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c6243b4c | 1 | /* Xstormy16 cpu description. |
e03f5d43 | 2 | Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 |
4b58290f GK |
3 | Free Software Foundation, Inc. |
4 | Contributed by Red Hat, Inc. | |
5 | ||
6 | This file is part of GNU CC. | |
7 | ||
8 | GNU CC is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2, or (at your option) | |
11 | any later version. | |
12 | ||
13 | GNU CC is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with GNU CC; see the file COPYING. If not, write to | |
20 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
21 | Boston, MA 02111-1307, USA. */ | |
22 | ||
4b58290f GK |
23 | \f |
24 | /* Driver configuration */ | |
25 | ||
d1552d7b | 26 | /* Defined in svr4.h. */ |
4b58290f GK |
27 | /* #define SWITCH_TAKES_ARG(CHAR) */ |
28 | ||
d1552d7b | 29 | /* Defined in svr4.h. */ |
4b58290f GK |
30 | /* #define WORD_SWITCH_TAKES_ARG(NAME) */ |
31 | ||
d1552d7b | 32 | /* Defined in svr4.h. */ |
4b58290f | 33 | #undef ASM_SPEC |
322fe6e1 | 34 | #define ASM_SPEC "" |
4b58290f | 35 | |
d1552d7b | 36 | /* Defined in svr4.h. */ |
4b58290f GK |
37 | /* #define ASM_FINAL_SPEC "" */ |
38 | ||
d1552d7b | 39 | /* Defined in svr4.h. */ |
4b58290f GK |
40 | /* #define LINK_SPEC "" */ |
41 | ||
d1552d7b | 42 | /* For xstormy16: |
3eaaf577 GK |
43 | - If -msim is specified, everything is built and linked as for the sim. |
44 | - If -T is specified, that linker script is used, and it should provide | |
45 | appropriate libraries. | |
46 | - If neither is specified, everything is built as for the sim, but no | |
47 | I/O support is assumed. | |
48 | ||
49 | */ | |
4b58290f | 50 | #undef LIB_SPEC |
3eaaf577 | 51 | #define LIB_SPEC "-( -lc %{msim:-lsim}%{!msim:%{!T*:-lnosys}} -)" |
4b58290f | 52 | |
d1552d7b | 53 | /* Defined in svr4.h. */ |
4b58290f GK |
54 | #undef STARTFILE_SPEC |
55 | #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s" | |
56 | ||
d1552d7b | 57 | /* Defined in svr4.h. */ |
4b58290f GK |
58 | #undef ENDFILE_SPEC |
59 | #define ENDFILE_SPEC "crtend.o%s crtn.o%s" | |
60 | ||
d1552d7b | 61 | /* Defined in svr4.h for host compilers. */ |
4b58290f GK |
62 | /* #define MD_EXEC_PREFIX "" */ |
63 | ||
d1552d7b | 64 | /* Defined in svr4.h for host compilers. */ |
4b58290f GK |
65 | /* #define MD_STARTFILE_PREFIX "" */ |
66 | ||
4b58290f GK |
67 | \f |
68 | /* Run-time target specifications */ | |
69 | ||
676997cf | 70 | #define CPP_PREDEFINES "-Dxstormy16 -Amachine=xstormy16" |
4b58290f GK |
71 | |
72 | /* This declaration should be present. */ | |
73 | extern int target_flags; | |
74 | ||
4b58290f GK |
75 | #define TARGET_SWITCHES \ |
76 | {{ "sim", 0, "Provide libraries for the simulator" }, \ | |
77 | { "", 0, "" }} | |
78 | ||
c6243b4c | 79 | #define TARGET_VERSION fprintf (stderr, " (xstormy16 cpu core)"); |
4b58290f | 80 | |
4b58290f GK |
81 | #define CAN_DEBUG_WITHOUT_FP |
82 | ||
83 | \f | |
84 | /* Storage Layout */ | |
85 | ||
4b58290f GK |
86 | #define BITS_BIG_ENDIAN 1 |
87 | ||
4b58290f GK |
88 | #define BYTES_BIG_ENDIAN 0 |
89 | ||
4b58290f GK |
90 | #define WORDS_BIG_ENDIAN 0 |
91 | ||
4b58290f GK |
92 | #define UNITS_PER_WORD 2 |
93 | ||
4b58290f GK |
94 | #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ |
95 | do { \ | |
96 | if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
97 | && GET_MODE_SIZE (MODE) < 2) \ | |
98 | (MODE) = HImode; \ | |
99 | } while (0) | |
100 | ||
4b58290f GK |
101 | #define PROMOTE_FUNCTION_ARGS 1 |
102 | ||
4b58290f GK |
103 | #define PROMOTE_FUNCTION_RETURN 1 |
104 | ||
4b58290f GK |
105 | #define PARM_BOUNDARY 16 |
106 | ||
4b58290f GK |
107 | #define STACK_BOUNDARY 16 |
108 | ||
4b58290f GK |
109 | #define FUNCTION_BOUNDARY 16 |
110 | ||
4b58290f GK |
111 | #define BIGGEST_ALIGNMENT 16 |
112 | ||
d1552d7b | 113 | /* Defined in svr4.h. */ |
4b58290f GK |
114 | /* #define MAX_OFILE_ALIGNMENT */ |
115 | ||
4b58290f GK |
116 | #define DATA_ALIGNMENT(TYPE, ALIGN) \ |
117 | (TREE_CODE (TYPE) == ARRAY_TYPE \ | |
118 | && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ | |
119 | && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) | |
120 | ||
4b58290f GK |
121 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ |
122 | (TREE_CODE (EXP) == STRING_CST \ | |
123 | && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) | |
124 | ||
4b58290f GK |
125 | #define STRICT_ALIGNMENT 1 |
126 | ||
d1552d7b | 127 | /* Defined in svr4.h. */ |
4b58290f GK |
128 | #define PCC_BITFIELD_TYPE_MATTERS 1 |
129 | ||
4b58290f GK |
130 | #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT |
131 | ||
4b58290f GK |
132 | \f |
133 | /* Layout of Source Language Data Types */ | |
134 | ||
4b58290f GK |
135 | #define INT_TYPE_SIZE 16 |
136 | ||
4b58290f GK |
137 | #define SHORT_TYPE_SIZE 16 |
138 | ||
4b58290f GK |
139 | #define LONG_TYPE_SIZE 32 |
140 | ||
4b58290f GK |
141 | #define LONG_LONG_TYPE_SIZE 64 |
142 | ||
4b58290f GK |
143 | #define FLOAT_TYPE_SIZE 32 |
144 | ||
4b58290f GK |
145 | #define DOUBLE_TYPE_SIZE 64 |
146 | ||
4b58290f GK |
147 | #define LONG_DOUBLE_TYPE_SIZE 64 |
148 | ||
4b58290f GK |
149 | #define DEFAULT_SIGNED_CHAR 0 |
150 | ||
d1552d7b | 151 | /* Defined in svr4.h. */ |
4b58290f GK |
152 | #define SIZE_TYPE "unsigned int" |
153 | ||
d1552d7b | 154 | /* Defined in svr4.h. */ |
4b58290f GK |
155 | #define PTRDIFF_TYPE "int" |
156 | ||
d1552d7b | 157 | /* Defined in svr4.h, to "long int". */ |
4b58290f GK |
158 | /* #define WCHAR_TYPE "long int" */ |
159 | ||
d1552d7b | 160 | /* Defined in svr4.h. */ |
4b58290f GK |
161 | #undef WCHAR_TYPE_SIZE |
162 | #define WCHAR_TYPE_SIZE 32 | |
163 | ||
4b58290f GK |
164 | /* Define this macro if the type of Objective C selectors should be `int'. |
165 | ||
166 | If this macro is not defined, then selectors should have the type `struct | |
167 | objc_selector *'. */ | |
168 | /* #define OBJC_INT_SELECTORS */ | |
169 | ||
4b58290f GK |
170 | \f |
171 | /* Register Basics */ | |
172 | ||
173 | /* Number of hardware registers known to the compiler. They receive numbers 0 | |
174 | through `FIRST_PSEUDO_REGISTER-1'; thus, the first pseudo register's number | |
175 | really is assigned the number `FIRST_PSEUDO_REGISTER'. */ | |
176 | #define FIRST_PSEUDO_REGISTER 19 | |
177 | ||
178 | /* An initializer that says which registers are used for fixed purposes all | |
179 | throughout the compiled code and are therefore not available for general | |
180 | allocation. These would include the stack pointer, the frame pointer | |
181 | (except on machines where that can be used as a general register when no | |
182 | frame pointer is needed), the program counter on machines where that is | |
183 | considered one of the addressable registers, and any other numbered register | |
184 | with a standard use. | |
185 | ||
186 | This information is expressed as a sequence of numbers, separated by commas | |
187 | and surrounded by braces. The Nth number is 1 if register N is fixed, 0 | |
188 | otherwise. | |
189 | ||
190 | The table initialized from this macro, and the table initialized by the | |
191 | following one, may be overridden at run time either automatically, by the | |
192 | actions of the macro `CONDITIONAL_REGISTER_USAGE', or by the user with the | |
193 | command options `-ffixed-REG', `-fcall-used-REG' and `-fcall-saved-REG'. */ | |
194 | #define FIXED_REGISTERS \ | |
195 | { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1 } | |
196 | ||
197 | /* Like `FIXED_REGISTERS' but has 1 for each register that is clobbered (in | |
198 | general) by function calls as well as for fixed registers. This macro | |
199 | therefore identifies the registers that are not available for general | |
200 | allocation of values that must live across function calls. | |
201 | ||
202 | If a register has 0 in `CALL_USED_REGISTERS', the compiler automatically | |
203 | saves it on function entry and restores it on function exit, if the register | |
204 | is used within the function. */ | |
205 | #define CALL_USED_REGISTERS \ | |
206 | { 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1 } | |
207 | ||
208 | /* Zero or more C statements that may conditionally modify two variables | |
209 | `fixed_regs' and `call_used_regs' (both of type `char []') after they have | |
210 | been initialized from the two preceding macros. | |
211 | ||
212 | This is necessary in case the fixed or call-clobbered registers depend on | |
213 | target flags. | |
214 | ||
215 | You need not define this macro if it has no work to do. | |
216 | ||
217 | If the usage of an entire class of registers depends on the target flags, | |
218 | you may indicate this to GCC by using this macro to modify `fixed_regs' and | |
219 | `call_used_regs' to 1 for each of the registers in the classes which should | |
220 | not be used by GCC. Also define the macro `REG_CLASS_FROM_LETTER' to return | |
221 | `NO_REGS' if it is called with a letter for a class that shouldn't be used. | |
222 | ||
223 | (However, if this class is not included in `GENERAL_REGS' and all of the | |
224 | insn patterns whose constraints permit this class are controlled by target | |
225 | switches, then GCC will automatically avoid using these registers when the | |
226 | target switches are opposed to them.) */ | |
227 | /* #define CONDITIONAL_REGISTER_USAGE */ | |
228 | ||
229 | /* If this macro is defined and has a nonzero value, it means that `setjmp' and | |
230 | related functions fail to save the registers, or that `longjmp' fails to | |
231 | restore them. To compensate, the compiler avoids putting variables in | |
232 | registers in functions that use `setjmp'. */ | |
233 | /* #define NON_SAVING_SETJMP */ | |
234 | ||
235 | /* Define this macro if the target machine has register windows. This C | |
236 | expression returns the register number as seen by the called function | |
237 | corresponding to the register number OUT as seen by the calling function. | |
238 | Return OUT if register number OUT is not an outbound register. */ | |
239 | /* #define INCOMING_REGNO(OUT) */ | |
240 | ||
241 | /* Define this macro if the target machine has register windows. This C | |
242 | expression returns the register number as seen by the calling function | |
243 | corresponding to the register number IN as seen by the called function. | |
244 | Return IN if register number IN is not an inbound register. */ | |
245 | /* #define OUTGOING_REGNO(IN) */ | |
246 | ||
247 | \f | |
248 | /* Order of allocation of registers */ | |
249 | ||
250 | /* If defined, an initializer for a vector of integers, containing the numbers | |
251 | of hard registers in the order in which GNU CC should prefer to use them | |
252 | (from most preferred to least). | |
253 | ||
254 | If this macro is not defined, registers are used lowest numbered first (all | |
255 | else being equal). | |
256 | ||
257 | One use of this macro is on machines where the highest numbered registers | |
258 | must always be saved and the save-multiple-registers instruction supports | |
259 | only sequences of consecutive registers. On such machines, define | |
260 | `REG_ALLOC_ORDER' to be an initializer that lists the highest numbered | |
261 | allocatable register first. */ | |
da6e254e | 262 | #define REG_ALLOC_ORDER { 7, 6, 5, 4, 3, 2, 1, 0, 9, 8, 10, 11, 12, 13, 14, 15, 16 } |
4b58290f GK |
263 | |
264 | /* A C statement (sans semicolon) to choose the order in which to allocate hard | |
265 | registers for pseudo-registers local to a basic block. | |
266 | ||
267 | Store the desired register order in the array `reg_alloc_order'. Element 0 | |
268 | should be the register to allocate first; element 1, the next register; and | |
269 | so on. | |
270 | ||
271 | The macro body should not assume anything about the contents of | |
272 | `reg_alloc_order' before execution of the macro. | |
273 | ||
274 | On most machines, it is not necessary to define this macro. */ | |
275 | /* #define ORDER_REGS_FOR_LOCAL_ALLOC */ | |
276 | ||
277 | \f | |
278 | /* How Values Fit in Registers */ | |
279 | ||
280 | /* A C expression for the number of consecutive hard registers, starting at | |
281 | register number REGNO, required to hold a value of mode MODE. | |
282 | ||
283 | On a machine where all registers are exactly one word, a suitable definition | |
284 | of this macro is | |
285 | ||
286 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
287 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ | |
288 | / UNITS_PER_WORD)) */ | |
289 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
290 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
291 | ||
292 | /* A C expression that is nonzero if it is permissible to store a value of mode | |
293 | MODE in hard register number REGNO (or in several registers starting with | |
294 | that one). For a machine where all registers are equivalent, a suitable | |
295 | definition is | |
296 | ||
297 | #define HARD_REGNO_MODE_OK(REGNO, MODE) 1 | |
298 | ||
299 | It is not necessary for this macro to check for the numbers of fixed | |
300 | registers, because the allocation mechanism considers them to be always | |
301 | occupied. | |
302 | ||
303 | On some machines, double-precision values must be kept in even/odd register | |
304 | pairs. The way to implement that is to define this macro to reject odd | |
305 | register numbers for such modes. | |
306 | ||
307 | The minimum requirement for a mode to be OK in a register is that the | |
308 | `movMODE' instruction pattern support moves between the register and any | |
309 | other hard register for which the mode is OK; and that moving a value into | |
310 | the register and back out not alter it. | |
311 | ||
312 | Since the same instruction used to move `SImode' will work for all narrower | |
313 | integer modes, it is not necessary on any machine for `HARD_REGNO_MODE_OK' | |
314 | to distinguish between these modes, provided you define patterns `movhi', | |
315 | etc., to take advantage of this. This is useful because of the interaction | |
316 | between `HARD_REGNO_MODE_OK' and `MODES_TIEABLE_P'; it is very desirable for | |
317 | all integer modes to be tieable. | |
318 | ||
319 | Many machines have special registers for floating point arithmetic. Often | |
320 | people assume that floating point machine modes are allowed only in floating | |
321 | point registers. This is not true. Any registers that can hold integers | |
322 | can safely *hold* a floating point machine mode, whether or not floating | |
323 | arithmetic can be done on it in those registers. Integer move instructions | |
324 | can be used to move the values. | |
325 | ||
326 | On some machines, though, the converse is true: fixed-point machine modes | |
327 | may not go in floating registers. This is true if the floating registers | |
328 | normalize any value stored in them, because storing a non-floating value | |
329 | there would garble it. In this case, `HARD_REGNO_MODE_OK' should reject | |
330 | fixed-point machine modes in floating registers. But if the floating | |
331 | registers do not automatically normalize, if you can store any bit pattern | |
332 | in one and retrieve it unchanged without a trap, then any machine mode may | |
333 | go in a floating register, so you can define this macro to say so. | |
334 | ||
335 | The primary significance of special floating registers is rather that they | |
336 | are the registers acceptable in floating point arithmetic instructions. | |
337 | However, this is of no concern to `HARD_REGNO_MODE_OK'. You handle it by | |
338 | writing the proper constraints for those instructions. | |
339 | ||
340 | On some machines, the floating registers are especially slow to access, so | |
341 | that it is better to store a value in a stack frame than in such a register | |
342 | if floating point arithmetic is not being done. As long as the floating | |
343 | registers are not in class `GENERAL_REGS', they will not be used unless some | |
344 | pattern's constraint asks for one. */ | |
345 | #define HARD_REGNO_MODE_OK(REGNO, MODE) ((REGNO) != 16 || (MODE) == BImode) | |
346 | ||
347 | /* A C expression that is nonzero if it is desirable to choose register | |
348 | allocation so as to avoid move instructions between a value of mode MODE1 | |
349 | and a value of mode MODE2. | |
350 | ||
351 | If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, MODE2)' are | |
352 | ever different for any R, then `MODES_TIEABLE_P (MODE1, MODE2)' must be | |
353 | zero. */ | |
354 | #define MODES_TIEABLE_P(MODE1, MODE2) ((MODE1) != BImode && (MODE2) != BImode) | |
355 | ||
356 | /* Define this macro if the compiler should avoid copies to/from CCmode | |
357 | registers. You should only define this macro if support fo copying to/from | |
358 | CCmode is incomplete. */ | |
359 | /* #define AVOID_CCMODE_COPIES */ | |
360 | ||
361 | \f | |
362 | /* Handling Leaf Functions */ | |
363 | ||
364 | /* A C initializer for a vector, indexed by hard register number, which | |
365 | contains 1 for a register that is allowable in a candidate for leaf function | |
366 | treatment. | |
367 | ||
368 | If leaf function treatment involves renumbering the registers, then the | |
369 | registers marked here should be the ones before renumbering--those that GNU | |
370 | CC would ordinarily allocate. The registers which will actually be used in | |
371 | the assembler code, after renumbering, should not be marked with 1 in this | |
372 | vector. | |
373 | ||
374 | Define this macro only if the target machine offers a way to optimize the | |
375 | treatment of leaf functions. */ | |
376 | /* #define LEAF_REGISTERS */ | |
377 | ||
378 | /* A C expression whose value is the register number to which REGNO should be | |
379 | renumbered, when a function is treated as a leaf function. | |
380 | ||
381 | If REGNO is a register number which should not appear in a leaf function | |
382 | before renumbering, then the expression should yield -1, which will cause | |
383 | the compiler to abort. | |
384 | ||
385 | Define this macro only if the target machine offers a way to optimize the | |
386 | treatment of leaf functions, and registers need to be renumbered to do this. */ | |
387 | /* #define LEAF_REG_REMAP(REGNO) */ | |
388 | ||
4b58290f GK |
389 | \f |
390 | /* Register Classes */ | |
391 | ||
392 | /* An enumeral type that must be defined with all the register class names as | |
393 | enumeral values. `NO_REGS' must be first. `ALL_REGS' must be the last | |
394 | register class, followed by one more enumeral value, `LIM_REG_CLASSES', | |
395 | which is not a register class but rather tells how many classes there are. | |
396 | ||
397 | Each register class has a number, which is the value of casting the class | |
398 | name to type `int'. The number serves as an index in many of the tables | |
399 | described below. */ | |
400 | enum reg_class | |
401 | { | |
402 | NO_REGS, | |
403 | R0_REGS, | |
404 | R1_REGS, | |
405 | TWO_REGS, | |
406 | R2_REGS, | |
407 | EIGHT_REGS, | |
408 | R8_REGS, | |
da6e254e | 409 | ICALL_REGS, |
4b58290f GK |
410 | GENERAL_REGS, |
411 | CARRY_REGS, | |
412 | ALL_REGS, | |
413 | LIM_REG_CLASSES | |
414 | }; | |
415 | ||
416 | /* The number of distinct register classes, defined as follows: | |
417 | ||
418 | #define N_REG_CLASSES (int) LIM_REG_CLASSES */ | |
419 | #define N_REG_CLASSES ((int) LIM_REG_CLASSES) | |
420 | ||
421 | /* An initializer containing the names of the register classes as C string | |
422 | constants. These names are used in writing some of the debugging dumps. */ | |
423 | #define REG_CLASS_NAMES \ | |
424 | { \ | |
425 | "NO_REGS", \ | |
426 | "R0_REGS", \ | |
427 | "R1_REGS", \ | |
428 | "TWO_REGS", \ | |
429 | "R2_REGS", \ | |
430 | "EIGHT_REGS", \ | |
431 | "R8_REGS", \ | |
da6e254e | 432 | "ICALL_REGS", \ |
4b58290f GK |
433 | "GENERAL_REGS", \ |
434 | "CARRY_REGS", \ | |
435 | "ALL_REGS" \ | |
436 | } | |
437 | ||
438 | /* An initializer containing the contents of the register classes, as integers | |
439 | which are bit masks. The Nth integer specifies the contents of class N. | |
440 | The way the integer MASK is interpreted is that register R is in the class | |
441 | if `MASK & (1 << R)' is 1. | |
442 | ||
443 | When the machine has more than 32 registers, an integer does not suffice. | |
444 | Then the integers are replaced by sub-initializers, braced groupings | |
445 | containing several integers. Each sub-initializer must be suitable as an | |
446 | initializer for the type `HARD_REG_SET' which is defined in | |
447 | `hard-reg-set.h'. */ | |
448 | #define REG_CLASS_CONTENTS \ | |
449 | { \ | |
b3656137 KG |
450 | { 0x00000 }, \ |
451 | { 0x00001 }, \ | |
452 | { 0x00002 }, \ | |
453 | { 0x00003 }, \ | |
454 | { 0x00004 }, \ | |
455 | { 0x000FF }, \ | |
456 | { 0x00100 }, \ | |
457 | { 0x00300 }, \ | |
458 | { 0x6FFFF }, \ | |
459 | { 0x10000 }, \ | |
460 | { (1 << FIRST_PSEUDO_REGISTER) - 1 } \ | |
4b58290f GK |
461 | } |
462 | ||
463 | /* A C expression whose value is a register class containing hard register | |
464 | REGNO. In general there is more than one such class; choose a class which | |
465 | is "minimal", meaning that no smaller class also contains the register. */ | |
466 | #define REGNO_REG_CLASS(REGNO) \ | |
467 | ((REGNO) == 0 ? R0_REGS \ | |
468 | : (REGNO) == 1 ? R1_REGS \ | |
469 | : (REGNO) == 2 ? R2_REGS \ | |
470 | : (REGNO) < 8 ? EIGHT_REGS \ | |
471 | : (REGNO) == 8 ? R8_REGS \ | |
472 | : (REGNO) == 16 ? CARRY_REGS \ | |
473 | : (REGNO) <= 18 ? GENERAL_REGS \ | |
474 | : ALL_REGS) | |
475 | ||
476 | /* A macro whose definition is the name of the class to which a valid base | |
477 | register must belong. A base register is one used in an address which is | |
478 | the register value plus a displacement. */ | |
479 | #define BASE_REG_CLASS GENERAL_REGS | |
480 | ||
481 | /* A macro whose definition is the name of the class to which a valid index | |
482 | register must belong. An index register is one used in an address where its | |
483 | value is either multiplied by a scale factor or added to another register | |
484 | (as well as added to a displacement). */ | |
485 | #define INDEX_REG_CLASS GENERAL_REGS | |
486 | ||
487 | /* A C expression which defines the machine-dependent operand constraint | |
488 | letters for register classes. If CHAR is such a letter, the value should be | |
489 | the register class corresponding to it. Otherwise, the value should be | |
490 | `NO_REGS'. The register letter `r', corresponding to class `GENERAL_REGS', | |
491 | will not be passed to this macro; you do not need to handle it. | |
492 | ||
493 | The following letters are unavailable, due to being used as | |
494 | constraints: | |
495 | '0'..'9' | |
496 | '<', '>' | |
497 | 'E', 'F', 'G', 'H' | |
498 | 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P' | |
499 | 'Q', 'R', 'S', 'T', 'U' | |
500 | 'V', 'X' | |
501 | 'g', 'i', 'm', 'n', 'o', 'p', 'r', 's' */ | |
502 | ||
503 | #define REG_CLASS_FROM_LETTER(CHAR) \ | |
504 | ( (CHAR) == 'a' ? R0_REGS \ | |
505 | : (CHAR) == 'b' ? R1_REGS \ | |
506 | : (CHAR) == 'c' ? R2_REGS \ | |
1853547e | 507 | : (CHAR) == 'd' ? R8_REGS \ |
4b58290f | 508 | : (CHAR) == 'e' ? EIGHT_REGS \ |
1853547e | 509 | : (CHAR) == 't' ? TWO_REGS \ |
4b58290f | 510 | : (CHAR) == 'y' ? CARRY_REGS \ |
da6e254e | 511 | : (CHAR) == 'z' ? ICALL_REGS \ |
4b58290f GK |
512 | : NO_REGS) |
513 | ||
514 | /* A C expression which is nonzero if register number NUM is suitable for use | |
515 | as a base register in operand addresses. It may be either a suitable hard | |
516 | register or a pseudo register that has been allocated such a hard register. */ | |
517 | #define REGNO_OK_FOR_BASE_P(NUM) 1 | |
518 | ||
519 | /* A C expression which is nonzero if register number NUM is suitable for use | |
520 | as an index register in operand addresses. It may be either a suitable hard | |
521 | register or a pseudo register that has been allocated such a hard register. | |
522 | ||
523 | The difference between an index register and a base register is that the | |
524 | index register may be scaled. If an address involves the sum of two | |
525 | registers, neither one of them scaled, then either one may be labeled the | |
526 | "base" and the other the "index"; but whichever labeling is used must fit | |
527 | the machine's constraints of which registers may serve in each capacity. | |
528 | The compiler will try both labelings, looking for one that is valid, and | |
529 | will reload one or both registers only if neither labeling works. */ | |
530 | #define REGNO_OK_FOR_INDEX_P(NUM) REGNO_OK_FOR_BASE_P (NUM) | |
531 | ||
532 | /* A C expression that places additional restrictions on the register class to | |
533 | use when it is necessary to copy value X into a register in class CLASS. | |
534 | The value is a register class; perhaps CLASS, or perhaps another, smaller | |
535 | class. On many machines, the following definition is safe: | |
536 | ||
537 | #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS | |
538 | ||
539 | Sometimes returning a more restrictive class makes better code. For | |
540 | example, on the 68000, when X is an integer constant that is in range for a | |
541 | `moveq' instruction, the value of this macro is always `DATA_REGS' as long | |
542 | as CLASS includes the data registers. Requiring a data register guarantees | |
543 | that a `moveq' will be used. | |
544 | ||
545 | If X is a `const_double', by returning `NO_REGS' you can force X into a | |
546 | memory constant. This is useful on certain machines where immediate | |
547 | floating values cannot be loaded into certain kinds of registers. | |
548 | ||
549 | This declaration must be present. */ | |
550 | #define PREFERRED_RELOAD_CLASS(X, CLASS) \ | |
c6243b4c | 551 | xstormy16_preferred_reload_class (X, CLASS) |
4b58290f GK |
552 | |
553 | /* Like `PREFERRED_RELOAD_CLASS', but for output reloads instead of input | |
554 | reloads. If you don't define this macro, the default is to use CLASS, | |
555 | unchanged. */ | |
556 | #define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \ | |
c6243b4c | 557 | xstormy16_preferred_reload_class (X, CLASS) |
4b58290f GK |
558 | |
559 | /* A C expression that places additional restrictions on the register class to | |
560 | use when it is necessary to be able to hold a value of mode MODE in a reload | |
561 | register for which class CLASS would ordinarily be used. | |
562 | ||
563 | Unlike `PREFERRED_RELOAD_CLASS', this macro should be used when there are | |
564 | certain modes that simply can't go in certain reload classes. | |
565 | ||
566 | The value is a register class; perhaps CLASS, or perhaps another, smaller | |
567 | class. | |
568 | ||
569 | Don't define this macro unless the target machine has limitations which | |
570 | require the macro to do something nontrivial. */ | |
571 | /* #define LIMIT_RELOAD_CLASS(MODE, CLASS) */ | |
572 | ||
573 | /* Many machines have some registers that cannot be copied directly to or from | |
574 | memory or even from other types of registers. An example is the `MQ' | |
575 | register, which on most machines, can only be copied to or from general | |
576 | registers, but not memory. Some machines allow copying all registers to and | |
577 | from memory, but require a scratch register for stores to some memory | |
578 | locations (e.g., those with symbolic address on the RT, and those with | |
579 | certain symbolic address on the Sparc when compiling PIC). In some cases, | |
580 | both an intermediate and a scratch register are required. | |
581 | ||
582 | You should define these macros to indicate to the reload phase that it may | |
583 | need to allocate at least one register for a reload in addition to the | |
584 | register to contain the data. Specifically, if copying X to a register | |
585 | CLASS in MODE requires an intermediate register, you should define | |
586 | `SECONDARY_INPUT_RELOAD_CLASS' to return the largest register class all of | |
587 | whose registers can be used as intermediate registers or scratch registers. | |
588 | ||
589 | If copying a register CLASS in MODE to X requires an intermediate or scratch | |
590 | register, `SECONDARY_OUTPUT_RELOAD_CLASS' should be defined to return the | |
591 | largest register class required. If the requirements for input and output | |
592 | reloads are the same, the macro `SECONDARY_RELOAD_CLASS' should be used | |
593 | instead of defining both macros identically. | |
594 | ||
595 | The values returned by these macros are often `GENERAL_REGS'. Return | |
596 | `NO_REGS' if no spare register is needed; i.e., if X can be directly copied | |
597 | to or from a register of CLASS in MODE without requiring a scratch register. | |
598 | Do not define this macro if it would always return `NO_REGS'. | |
599 | ||
600 | If a scratch register is required (either with or without an intermediate | |
601 | register), you should define patterns for `reload_inM' or `reload_outM', as | |
602 | required.. These patterns, which will normally be implemented with a | |
603 | `define_expand', should be similar to the `movM' patterns, except that | |
604 | operand 2 is the scratch register. | |
605 | ||
606 | Define constraints for the reload register and scratch register that contain | |
607 | a single register class. If the original reload register (whose class is | |
608 | CLASS) can meet the constraint given in the pattern, the value returned by | |
609 | these macros is used for the class of the scratch register. Otherwise, two | |
610 | additional reload registers are required. Their classes are obtained from | |
611 | the constraints in the insn pattern. | |
612 | ||
613 | X might be a pseudo-register or a `subreg' of a pseudo-register, which could | |
614 | either be in a hard register or in memory. Use `true_regnum' to find out; | |
615 | it will return -1 if the pseudo is in memory and the hard register number if | |
616 | it is in a register. | |
617 | ||
618 | These macros should not be used in the case where a particular class of | |
619 | registers can only be copied to memory and not to another class of | |
620 | registers. In that case, secondary reload registers are not needed and | |
621 | would not be helpful. Instead, a stack location must be used to perform the | |
e03f5d43 | 622 | copy and the `movM' pattern should use memory as an intermediate storage. |
4b58290f GK |
623 | This case often occurs between floating-point and general registers. */ |
624 | ||
625 | /* This chip has the interesting property that only the first eight | |
626 | registers can be moved to/from memory. */ | |
627 | #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \ | |
c6243b4c | 628 | xstormy16_secondary_reload_class (CLASS, MODE, X) |
4b58290f GK |
629 | |
630 | /* #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) */ | |
631 | /* #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) */ | |
632 | ||
633 | /* Certain machines have the property that some registers cannot be copied to | |
634 | some other registers without using memory. Define this macro on those | |
635 | machines to be a C expression that is non-zero if objects of mode M in | |
636 | registers of CLASS1 can only be copied to registers of class CLASS2 by | |
637 | storing a register of CLASS1 into memory and loading that memory location | |
638 | into a register of CLASS2. | |
639 | ||
640 | Do not define this macro if its value would always be zero. */ | |
641 | /* #define SECONDARY_MEMORY_NEEDED(CLASS1, CLASS2, M) */ | |
642 | ||
643 | /* Normally when `SECONDARY_MEMORY_NEEDED' is defined, the compiler allocates a | |
644 | stack slot for a memory location needed for register copies. If this macro | |
645 | is defined, the compiler instead uses the memory location defined by this | |
646 | macro. | |
647 | ||
648 | Do not define this macro if you do not define | |
649 | `SECONDARY_MEMORY_NEEDED'. */ | |
650 | /* #define SECONDARY_MEMORY_NEEDED_RTX(MODE) */ | |
651 | ||
652 | /* When the compiler needs a secondary memory location to copy between two | |
653 | registers of mode MODE, it normally allocates sufficient memory to hold a | |
654 | quantity of `BITS_PER_WORD' bits and performs the store and load operations | |
655 | in a mode that many bits wide and whose class is the same as that of MODE. | |
656 | ||
657 | This is right thing to do on most machines because it ensures that all bits | |
658 | of the register are copied and prevents accesses to the registers in a | |
659 | narrower mode, which some machines prohibit for floating-point registers. | |
660 | ||
661 | However, this default behavior is not correct on some machines, such as the | |
662 | DEC Alpha, that store short integers in floating-point registers differently | |
663 | than in integer registers. On those machines, the default widening will not | |
664 | work correctly and you must define this macro to suppress that widening in | |
665 | some cases. See the file `alpha.h' for details. | |
666 | ||
667 | Do not define this macro if you do not define `SECONDARY_MEMORY_NEEDED' or | |
668 | if widening MODE to a mode that is `BITS_PER_WORD' bits wide is correct for | |
669 | your machine. */ | |
670 | /* #define SECONDARY_MEMORY_NEEDED_MODE(MODE) */ | |
671 | ||
672 | /* Normally the compiler avoids choosing registers that have been explicitly | |
673 | mentioned in the rtl as spill registers (these registers are normally those | |
674 | used to pass parameters and return values). However, some machines have so | |
675 | few registers of certain classes that there would not be enough registers to | |
676 | use as spill registers if this were done. | |
677 | ||
678 | Define `SMALL_REGISTER_CLASSES' to be an expression with a non-zero value on | |
679 | these machines. When this macro has a non-zero value, the compiler allows | |
680 | registers explicitly used in the rtl to be used as spill registers but | |
681 | avoids extending the lifetime of these registers. | |
682 | ||
683 | It is always safe to define this macro with a non-zero value, but if you | |
684 | unnecessarily define it, you will reduce the amount of optimizations that | |
685 | can be performed in some cases. If you do not define this macro with a | |
686 | non-zero value when it is required, the compiler will run out of spill | |
687 | registers and print a fatal error message. For most machines, you should | |
688 | not define this macro at all. */ | |
689 | /* #define SMALL_REGISTER_CLASSES */ | |
690 | ||
691 | /* A C expression whose value is nonzero if pseudos that have been assigned to | |
692 | registers of class CLASS would likely be spilled because registers of CLASS | |
693 | are needed for spill registers. | |
694 | ||
695 | The default value of this macro returns 1 if CLASS has exactly one register | |
696 | and zero otherwise. On most machines, this default should be used. Only | |
697 | define this macro to some other expression if pseudo allocated by | |
698 | `local-alloc.c' end up in memory because their hard registers were needed | |
699 | for spill registers. If this macro returns nonzero for those classes, those | |
700 | pseudos will only be allocated by `global.c', which knows how to reallocate | |
701 | the pseudo to another register. If there would not be another register | |
702 | available for reallocation, you should not change the definition of this | |
703 | macro since the only effect of such a definition would be to slow down | |
704 | register allocation. */ | |
705 | /* #define CLASS_LIKELY_SPILLED_P(CLASS) */ | |
706 | ||
707 | /* A C expression for the maximum number of consecutive registers of | |
708 | class CLASS needed to hold a value of mode MODE. | |
709 | ||
710 | This is closely related to the macro `HARD_REGNO_NREGS'. In fact, the value | |
711 | of the macro `CLASS_MAX_NREGS (CLASS, MODE)' should be the maximum value of | |
712 | `HARD_REGNO_NREGS (REGNO, MODE)' for all REGNO values in the class CLASS. | |
713 | ||
714 | This macro helps control the handling of multiple-word values in | |
715 | the reload pass. | |
716 | ||
717 | This declaration is required. */ | |
718 | #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
719 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
720 | ||
721 | /* If defined, a C expression for a class that contains registers which the | |
722 | compiler must always access in a mode that is the same size as the mode in | |
723 | which it loaded the register. | |
724 | ||
725 | For the example, loading 32-bit integer or floating-point objects into | |
726 | floating-point registers on the Alpha extends them to 64-bits. Therefore | |
727 | loading a 64-bit object and then storing it as a 32-bit object does not | |
728 | store the low-order 32-bits, as would be the case for a normal register. | |
729 | Therefore, `alpha.h' defines this macro as `FLOAT_REGS'. */ | |
730 | /* #define CLASS_CANNOT_CHANGE_SIZE */ | |
731 | ||
732 | /* A C expression that defines the machine-dependent operand constraint letters | |
733 | (`I', `J', `K', .. 'P') that specify particular ranges of integer values. | |
734 | If C is one of those letters, the expression should check that VALUE, an | |
735 | integer, is in the appropriate range and return 1 if so, 0 otherwise. If C | |
736 | is not one of those letters, the value should be 0 regardless of VALUE. */ | |
737 | #define CONST_OK_FOR_LETTER_P(VALUE, C) \ | |
738 | ( (C) == 'I' ? (VALUE) >= 0 && (VALUE) <= 3 \ | |
739 | : (C) == 'J' ? exact_log2 (VALUE) != -1 \ | |
740 | : (C) == 'K' ? exact_log2 (~(VALUE)) != -1 \ | |
741 | : (C) == 'L' ? (VALUE) >= 0 && (VALUE) <= 255 \ | |
742 | : (C) == 'M' ? (VALUE) >= -255 && (VALUE) <= 0 \ | |
743 | : (C) == 'N' ? (VALUE) >= -3 && (VALUE) <= 0 \ | |
744 | : (C) == 'O' ? (VALUE) >= 1 && (VALUE) <= 4 \ | |
745 | : (C) == 'P' ? (VALUE) >= -4 && (VALUE) <= -1 \ | |
746 | : 0 ) | |
747 | ||
748 | /* A C expression that defines the machine-dependent operand constraint letters | |
749 | (`G', `H') that specify particular ranges of `const_double' values. | |
750 | ||
751 | If C is one of those letters, the expression should check that VALUE, an RTX | |
752 | of code `const_double', is in the appropriate range and return 1 if so, 0 | |
753 | otherwise. If C is not one of those letters, the value should be 0 | |
754 | regardless of VALUE. | |
755 | ||
756 | `const_double' is used for all floating-point constants and for `DImode' | |
757 | fixed-point constants. A given letter can accept either or both kinds of | |
758 | values. It can use `GET_MODE' to distinguish between these kinds. */ | |
759 | #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) 0 | |
760 | ||
761 | /* A C expression that defines the optional machine-dependent constraint | |
762 | letters (`Q', `R', `S', `T', `U') that can be used to segregate specific | |
763 | types of operands, usually memory references, for the target machine. | |
764 | Normally this macro will not be defined. If it is required for a particular | |
765 | target machine, it should return 1 if VALUE corresponds to the operand type | |
766 | represented by the constraint letter C. If C is not defined as an extra | |
767 | constraint, the value returned should be 0 regardless of VALUE. | |
768 | ||
769 | For example, on the ROMP, load instructions cannot have their output in r0 | |
770 | if the memory reference contains a symbolic address. Constraint letter `Q' | |
771 | is defined as representing a memory address that does *not* contain a | |
772 | symbolic address. An alternative is specified with a `Q' constraint on the | |
773 | input and `r' on the output. The next alternative specifies `m' on the | |
774 | input and a register class that does not include r0 on the output. */ | |
775 | #define EXTRA_CONSTRAINT(VALUE, C) \ | |
c6243b4c | 776 | xstormy16_extra_constraint_p (VALUE, C) |
4b58290f GK |
777 | |
778 | \f | |
779 | /* Basic Stack Layout */ | |
780 | ||
781 | /* Define this macro if pushing a word onto the stack moves the stack pointer | |
782 | to a smaller address. | |
783 | ||
784 | When we say, "define this macro if ...," it means that the compiler checks | |
785 | this macro only with `#ifdef' so the precise definition used does not | |
786 | matter. */ | |
787 | /* #define STACK_GROWS_DOWNWARD */ | |
788 | ||
789 | /* We want to use post-increment instructions to push things on the stack, | |
790 | because we don't have any pre-increment ones. */ | |
791 | #define STACK_PUSH_CODE POST_INC | |
792 | ||
793 | /* Define this macro if the addresses of local variable slots are at negative | |
794 | offsets from the frame pointer. */ | |
795 | /* #define FRAME_GROWS_DOWNWARD */ | |
796 | ||
797 | /* Define this macro if successive arguments to a function occupy decreasing | |
798 | addresses on the stack. */ | |
799 | #define ARGS_GROW_DOWNWARD 1 | |
800 | ||
801 | /* Offset from the frame pointer to the first local variable slot to be | |
802 | allocated. | |
803 | ||
804 | If `FRAME_GROWS_DOWNWARD', find the next slot's offset by | |
805 | subtracting the first slot's length from `STARTING_FRAME_OFFSET'. | |
806 | Otherwise, it is found by adding the length of the first slot to | |
807 | the value `STARTING_FRAME_OFFSET'. */ | |
808 | #define STARTING_FRAME_OFFSET 0 | |
809 | ||
810 | /* Offset from the stack pointer register to the first location at which | |
811 | outgoing arguments are placed. If not specified, the default value of zero | |
812 | is used. This is the proper value for most machines. | |
813 | ||
814 | If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first | |
815 | location at which outgoing arguments are placed. */ | |
816 | /* #define STACK_POINTER_OFFSET */ | |
817 | ||
818 | /* Offset from the argument pointer register to the first argument's address. | |
819 | On some machines it may depend on the data type of the function. | |
820 | ||
821 | If `ARGS_GROW_DOWNWARD', this is the offset to the location above the first | |
822 | argument's address. */ | |
823 | #define FIRST_PARM_OFFSET(FUNDECL) 0 | |
824 | ||
825 | /* Offset from the stack pointer register to an item dynamically allocated on | |
826 | the stack, e.g., by `alloca'. | |
827 | ||
828 | The default value for this macro is `STACK_POINTER_OFFSET' plus the length | |
829 | of the outgoing arguments. The default is correct for most machines. See | |
830 | `function.c' for details. */ | |
831 | /* #define STACK_DYNAMIC_OFFSET(FUNDECL) */ | |
832 | ||
833 | /* A C expression whose value is RTL representing the address in a stack frame | |
834 | where the pointer to the caller's frame is stored. Assume that FRAMEADDR is | |
835 | an RTL expression for the address of the stack frame itself. | |
836 | ||
837 | If you don't define this macro, the default is to return the value of | |
838 | FRAMEADDR--that is, the stack frame address is also the address of the stack | |
839 | word that points to the previous frame. */ | |
840 | /* #define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) */ | |
841 | ||
842 | /* If defined, a C expression that produces the machine-specific code to setup | |
843 | the stack so that arbitrary frames can be accessed. For example, on the | |
844 | Sparc, we must flush all of the register windows to the stack before we can | |
845 | access arbitrary stack frames. This macro will seldom need to be defined. */ | |
846 | /* #define SETUP_FRAME_ADDRESSES() */ | |
847 | ||
848 | /* A C expression whose value is RTL representing the value of the return | |
849 | address for the frame COUNT steps up from the current frame, after the | |
850 | prologue. FRAMEADDR is the frame pointer of the COUNT frame, or the frame | |
851 | pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' is | |
852 | defined. | |
853 | ||
854 | The value of the expression must always be the correct address when COUNT is | |
855 | zero, but may be `NULL_RTX' if there is not way to determine the return | |
856 | address of other frames. */ | |
857 | #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \ | |
858 | ((COUNT) == 0 \ | |
859 | ? gen_rtx_MEM (Pmode, arg_pointer_rtx) \ | |
860 | : NULL_RTX) | |
861 | ||
862 | /* Define this if the return address of a particular stack frame is | |
863 | accessed from the frame pointer of the previous stack frame. */ | |
864 | /* #define RETURN_ADDR_IN_PREVIOUS_FRAME */ | |
865 | ||
866 | /* A C expression whose value is RTL representing the location of the incoming | |
867 | return address at the beginning of any function, before the prologue. This | |
868 | RTL is either a `REG', indicating that the return value is saved in `REG', | |
869 | or a `MEM' representing a location in the stack. | |
870 | ||
871 | You only need to define this macro if you want to support call frame | |
872 | debugging information like that provided by DWARF 2. */ | |
873 | #define INCOMING_RETURN_ADDR_RTX \ | |
874 | gen_rtx_MEM (SImode, gen_rtx_PLUS (Pmode, stack_pointer_rtx, GEN_INT (-4))) | |
875 | ||
876 | /* A C expression whose value is an integer giving the offset, in bytes, from | |
877 | the value of the stack pointer register to the top of the stack frame at the | |
878 | beginning of any function, before the prologue. The top of the frame is | |
879 | defined to be the value of the stack pointer in the previous frame, just | |
880 | before the call instruction. | |
881 | ||
882 | You only need to define this macro if you want to support call frame | |
883 | debugging information like that provided by DWARF 2. */ | |
c6243b4c | 884 | #define INCOMING_FRAME_SP_OFFSET (xstormy16_interrupt_function_p () ? 6 : 4) |
4b58290f GK |
885 | |
886 | \f | |
887 | /* Stack Checking. */ | |
888 | ||
889 | /* A nonzero value if stack checking is done by the configuration files in a | |
890 | machine-dependent manner. You should define this macro if stack checking is | |
891 | require by the ABI of your machine or if you would like to have to stack | |
892 | checking in some more efficient way than GNU CC's portable approach. The | |
893 | default value of this macro is zero. */ | |
894 | /* #define STACK_CHECK_BUILTIN */ | |
895 | ||
896 | /* An integer representing the interval at which GNU CC must generate stack | |
897 | probe instructions. You will normally define this macro to be no larger | |
898 | than the size of the "guard pages" at the end of a stack area. The default | |
899 | value of 4096 is suitable for most systems. */ | |
900 | /* #define STACK_CHECK_PROBE_INTERVAL */ | |
901 | ||
902 | /* A integer which is nonzero if GNU CC should perform the stack probe as a | |
903 | load instruction and zero if GNU CC should use a store instruction. The | |
904 | default is zero, which is the most efficient choice on most systems. */ | |
905 | /* #define STACK_CHECK_PROBE_LOAD */ | |
906 | ||
907 | /* The number of bytes of stack needed to recover from a stack overflow, for | |
908 | languages where such a recovery is supported. The default value of 75 words | |
909 | should be adequate for most machines. */ | |
910 | /* #define STACK_CHECK_PROTECT */ | |
911 | ||
912 | /* The maximum size of a stack frame, in bytes. GNU CC will generate probe | |
913 | instructions in non-leaf functions to ensure at least this many bytes of | |
914 | stack are available. If a stack frame is larger than this size, stack | |
915 | checking will not be reliable and GNU CC will issue a warning. The default | |
916 | is chosen so that GNU CC only generates one instruction on most systems. | |
917 | You should normally not change the default value of this macro. */ | |
918 | /* #define STACK_CHECK_MAX_FRAME_SIZE */ | |
919 | ||
920 | /* GNU CC uses this value to generate the above warning message. It represents | |
921 | the amount of fixed frame used by a function, not including space for any | |
922 | callee-saved registers, temporaries and user variables. You need only | |
923 | specify an upper bound for this amount and will normally use the default of | |
924 | four words. */ | |
925 | /* #define STACK_CHECK_FIXED_FRAME_SIZE */ | |
926 | ||
927 | /* The maximum size, in bytes, of an object that GNU CC will place in the fixed | |
928 | area of the stack frame when the user specifies `-fstack-check'. GNU CC | |
929 | computed the default from the values of the above macros and you will | |
930 | normally not need to override that default. */ | |
931 | /* #define STACK_CHECK_MAX_VAR_SIZE */ | |
932 | ||
933 | \f | |
934 | /* Register That Address the Stack Frame. */ | |
935 | ||
936 | /* The register number of the stack pointer register, which must also be a | |
937 | fixed register according to `FIXED_REGISTERS'. On most machines, the | |
938 | hardware determines which register this is. */ | |
939 | #define STACK_POINTER_REGNUM 15 | |
940 | ||
941 | /* The register number of the frame pointer register, which is used to access | |
942 | automatic variables in the stack frame. On some machines, the hardware | |
943 | determines which register this is. On other machines, you can choose any | |
944 | register you wish for this purpose. */ | |
945 | #define FRAME_POINTER_REGNUM 17 | |
946 | ||
947 | /* On some machines the offset between the frame pointer and starting offset of | |
948 | the automatic variables is not known until after register allocation has | |
949 | been done (for example, because the saved registers are between these two | |
950 | locations). On those machines, define `FRAME_POINTER_REGNUM' the number of | |
951 | a special, fixed register to be used internally until the offset is known, | |
952 | and define `HARD_FRAME_POINTER_REGNUM' to be actual the hard register number | |
953 | used for the frame pointer. | |
954 | ||
955 | You should define this macro only in the very rare circumstances when it is | |
956 | not possible to calculate the offset between the frame pointer and the | |
957 | automatic variables until after register allocation has been completed. | |
958 | When this macro is defined, you must also indicate in your definition of | |
959 | `ELIMINABLE_REGS' how to eliminate `FRAME_POINTER_REGNUM' into either | |
960 | `HARD_FRAME_POINTER_REGNUM' or `STACK_POINTER_REGNUM'. | |
961 | ||
962 | Do not define this macro if it would be the same as `FRAME_POINTER_REGNUM'. */ | |
963 | #define HARD_FRAME_POINTER_REGNUM 13 | |
964 | ||
965 | /* The register number of the arg pointer register, which is used to access the | |
966 | function's argument list. On some machines, this is the same as the frame | |
967 | pointer register. On some machines, the hardware determines which register | |
968 | this is. On other machines, you can choose any register you wish for this | |
969 | purpose. If this is not the same register as the frame pointer register, | |
970 | then you must mark it as a fixed register according to `FIXED_REGISTERS', or | |
971 | arrange to be able to eliminate it. */ | |
972 | #define ARG_POINTER_REGNUM 18 | |
973 | ||
974 | /* The register number of the return address pointer register, which is used to | |
975 | access the current function's return address from the stack. On some | |
976 | machines, the return address is not at a fixed offset from the frame pointer | |
977 | or stack pointer or argument pointer. This register can be defined to point | |
978 | to the return address on the stack, and then be converted by | |
979 | `ELIMINABLE_REGS' into either the frame pointer or stack pointer. | |
980 | ||
981 | Do not define this macro unless there is no other way to get the return | |
982 | address from the stack. */ | |
983 | /* #define RETURN_ADDRESS_POINTER_REGNUM */ | |
984 | ||
985 | /* Register numbers used for passing a function's static chain pointer. If | |
986 | register windows are used, the register number as seen by the called | |
987 | function is `STATIC_CHAIN_INCOMING_REGNUM', while the register number as | |
988 | seen by the calling function is `STATIC_CHAIN_REGNUM'. If these registers | |
989 | are the same, `STATIC_CHAIN_INCOMING_REGNUM' need not be defined. | |
990 | ||
991 | The static chain register need not be a fixed register. | |
992 | ||
993 | If the static chain is passed in memory, these macros should not be defined; | |
994 | instead, the next two macros should be defined. */ | |
e2470e1b | 995 | #define STATIC_CHAIN_REGNUM 1 |
4b58290f GK |
996 | /* #define STATIC_CHAIN_INCOMING_REGNUM */ |
997 | ||
998 | /* If the static chain is passed in memory, these macros provide rtx giving | |
999 | `mem' expressions that denote where they are stored. `STATIC_CHAIN' and | |
1000 | `STATIC_CHAIN_INCOMING' give the locations as seen by the calling and called | |
1001 | functions, respectively. Often the former will be at an offset from the | |
1002 | stack pointer and the latter at an offset from the frame pointer. | |
1003 | ||
1004 | The variables `stack_pointer_rtx', `frame_pointer_rtx', and | |
1005 | `arg_pointer_rtx' will have been initialized prior to the use of these | |
1006 | macros and should be used to refer to those items. | |
1007 | ||
1008 | If the static chain is passed in a register, the two previous | |
1009 | macros should be defined instead. */ | |
1010 | /* #define STATIC_CHAIN */ | |
1011 | /* #define STATIC_CHAIN_INCOMING */ | |
1012 | ||
1013 | \f | |
1014 | /* Eliminating the Frame Pointer and the Arg Pointer */ | |
1015 | ||
1016 | /* A C expression which is nonzero if a function must have and use a frame | |
1017 | pointer. This expression is evaluated in the reload pass. If its value is | |
1018 | nonzero the function will have a frame pointer. | |
1019 | ||
1020 | The expression can in principle examine the current function and decide | |
1021 | according to the facts, but on most machines the constant 0 or the constant | |
1022 | 1 suffices. Use 0 when the machine allows code to be generated with no | |
1023 | frame pointer, and doing so saves some time or space. Use 1 when there is | |
1024 | no possible advantage to avoiding a frame pointer. | |
1025 | ||
1026 | In certain cases, the compiler does not know how to produce valid code | |
1027 | without a frame pointer. The compiler recognizes those cases and | |
1028 | automatically gives the function a frame pointer regardless of what | |
1029 | `FRAME_POINTER_REQUIRED' says. You don't need to worry about them. | |
1030 | ||
1031 | In a function that does not require a frame pointer, the frame pointer | |
1032 | register can be allocated for ordinary usage, unless you mark it as a fixed | |
1033 | register. See `FIXED_REGISTERS' for more information. */ | |
1034 | #define FRAME_POINTER_REQUIRED 0 | |
1035 | ||
1036 | /* A C statement to store in the variable DEPTH_VAR the difference between the | |
1037 | frame pointer and the stack pointer values immediately after the function | |
1038 | prologue. The value would be computed from information such as the result | |
1039 | of `get_frame_size ()' and the tables of registers `regs_ever_live' and | |
1040 | `call_used_regs'. | |
1041 | ||
1042 | If `ELIMINABLE_REGS' is defined, this macro will be not be used and need not | |
1043 | be defined. Otherwise, it must be defined even if `FRAME_POINTER_REQUIRED' | |
1044 | is defined to always be true; in that case, you may set DEPTH_VAR to | |
1045 | anything. */ | |
1046 | /* #define INITIAL_FRAME_POINTER_OFFSET(DEPTH_VAR) */ | |
1047 | ||
1048 | /* If defined, this macro specifies a table of register pairs used to eliminate | |
1049 | unneeded registers that point into the stack frame. If it is not defined, | |
1050 | the only elimination attempted by the compiler is to replace references to | |
1051 | the frame pointer with references to the stack pointer. | |
1052 | ||
1053 | The definition of this macro is a list of structure initializations, each of | |
1054 | which specifies an original and replacement register. | |
1055 | */ | |
1056 | ||
1057 | #define ELIMINABLE_REGS \ | |
1058 | { \ | |
1059 | {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1060 | {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
1061 | {ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ | |
1062 | {ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \ | |
1063 | } | |
1064 | ||
1065 | /* A C expression that returns non-zero if the compiler is allowed to try to | |
1066 | replace register number FROM with register number TO. This macro need only | |
1067 | be defined if `ELIMINABLE_REGS' is defined, and will usually be the constant | |
1068 | 1, since most of the cases preventing register elimination are things that | |
1069 | the compiler already knows about. */ | |
1070 | ||
1071 | #define CAN_ELIMINATE(FROM, TO) \ | |
1072 | ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \ | |
1073 | ? ! frame_pointer_needed \ | |
1074 | : 1) | |
1075 | ||
1076 | /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It specifies the | |
1077 | initial difference between the specified pair of registers. This macro must | |
1078 | be defined if `ELIMINABLE_REGS' is defined. */ | |
1079 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
c6243b4c | 1080 | (OFFSET) = xstormy16_initial_elimination_offset (FROM, TO) |
4b58290f | 1081 | |
4b58290f GK |
1082 | \f |
1083 | /* Passing Function Arguments on the Stack */ | |
1084 | ||
1085 | /* Define this macro if an argument declared in a prototype as an integral type | |
1086 | smaller than `int' should actually be passed as an `int'. In addition to | |
1087 | avoiding errors in certain cases of mismatch, it also makes for better code | |
1088 | on certain machines. */ | |
1089 | #define PROMOTE_PROTOTYPES 1 | |
1090 | ||
1091 | /* A C expression that is the number of bytes actually pushed onto the stack | |
1092 | when an instruction attempts to push NPUSHED bytes. | |
1093 | ||
1094 | If the target machine does not have a push instruction, do not define this | |
1095 | macro. That directs GNU CC to use an alternate strategy: to allocate the | |
1096 | entire argument block and then store the arguments into it. | |
1097 | ||
1098 | On some machines, the definition | |
1099 | ||
1100 | #define PUSH_ROUNDING(BYTES) (BYTES) | |
1101 | ||
1102 | will suffice. But on other machines, instructions that appear to push one | |
1103 | byte actually push two bytes in an attempt to maintain alignment. Then the | |
1104 | definition should be | |
1105 | ||
1106 | #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) */ | |
1107 | #define PUSH_ROUNDING(BYTES) (((BYTES) + 1) & ~1) | |
1108 | ||
1109 | /* If defined, the maximum amount of space required for outgoing arguments will | |
1110 | be computed and placed into the variable | |
1111 | `current_function_outgoing_args_size'. No space will be pushed onto the | |
1112 | stack for each call; instead, the function prologue should increase the | |
1113 | stack frame size by this amount. | |
1114 | ||
1115 | Defining both `PUSH_ROUNDING' and `ACCUMULATE_OUTGOING_ARGS' is not | |
1116 | proper. */ | |
1117 | /* #define ACCUMULATE_OUTGOING_ARGS */ | |
1118 | ||
1119 | /* Define this macro if functions should assume that stack space has been | |
1120 | allocated for arguments even when their values are passed in registers. | |
1121 | ||
1122 | The value of this macro is the size, in bytes, of the area reserved for | |
1123 | arguments passed in registers for the function represented by FNDECL. | |
1124 | ||
1125 | This space can be allocated by the caller, or be a part of the | |
1126 | machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says | |
1127 | which. */ | |
1128 | /* #define REG_PARM_STACK_SPACE(FNDECL) */ | |
1129 | ||
1130 | /* Define these macros in addition to the one above if functions might allocate | |
1131 | stack space for arguments even when their values are passed in registers. | |
1132 | These should be used when the stack space allocated for arguments in | |
1133 | registers is not a simple constant independent of the function declaration. | |
1134 | ||
1135 | The value of the first macro is the size, in bytes, of the area that we | |
1136 | should initially assume would be reserved for arguments passed in registers. | |
1137 | ||
1138 | The value of the second macro is the actual size, in bytes, of the area that | |
1139 | will be reserved for arguments passed in registers. This takes two | |
1140 | arguments: an integer representing the number of bytes of fixed sized | |
1141 | arguments on the stack, and a tree representing the number of bytes of | |
1142 | variable sized arguments on the stack. | |
1143 | ||
1144 | When these macros are defined, `REG_PARM_STACK_SPACE' will only be called | |
1145 | for libcall functions, the current function, or for a function being called | |
1146 | when it is known that such stack space must be allocated. In each case this | |
1147 | value can be easily computed. | |
1148 | ||
1149 | When deciding whether a called function needs such stack space, and how much | |
1150 | space to reserve, GNU CC uses these two macros instead of | |
1151 | `REG_PARM_STACK_SPACE'. */ | |
1152 | /* #define MAYBE_REG_PARM_STACK_SPACE */ | |
1153 | /* #define FINAL_REG_PARM_STACK_SPACE(CONST_SIZE, VAR_SIZE) */ | |
1154 | ||
1155 | /* Define this if it is the responsibility of the caller to allocate the area | |
1156 | reserved for arguments passed in registers. | |
1157 | ||
1158 | If `ACCUMULATE_OUTGOING_ARGS' is defined, this macro controls whether the | |
1159 | space for these arguments counts in the value of | |
1160 | `current_function_outgoing_args_size'. */ | |
1161 | /* #define OUTGOING_REG_PARM_STACK_SPACE */ | |
1162 | ||
1163 | /* Define this macro if `REG_PARM_STACK_SPACE' is defined, but the stack | |
1164 | parameters don't skip the area specified by it. | |
1165 | ||
1166 | Normally, when a parameter is not passed in registers, it is placed on the | |
1167 | stack beyond the `REG_PARM_STACK_SPACE' area. Defining this macro | |
1168 | suppresses this behavior and causes the parameter to be passed on the stack | |
1169 | in its natural location. */ | |
1170 | /* #define STACK_PARMS_IN_REG_PARM_AREA */ | |
1171 | ||
1172 | /* A C expression that should indicate the number of bytes of its own arguments | |
1173 | that a function pops on returning, or 0 if the function pops no arguments | |
1174 | and the caller must therefore pop them all after the function returns. | |
1175 | ||
1176 | FUNDECL is a C variable whose value is a tree node that describes the | |
1177 | function in question. Normally it is a node of type `FUNCTION_DECL' that | |
1178 | describes the declaration of the function. From this it is possible to | |
91d231cb | 1179 | obtain the DECL_ATTRIBUTES of the function. |
4b58290f GK |
1180 | |
1181 | FUNTYPE is a C variable whose value is a tree node that describes the | |
1182 | function in question. Normally it is a node of type `FUNCTION_TYPE' that | |
1183 | describes the data type of the function. From this it is possible to obtain | |
1184 | the data types of the value and arguments (if known). | |
1185 | ||
1186 | When a call to a library function is being considered, FUNTYPE will contain | |
1187 | an identifier node for the library function. Thus, if you need to | |
1188 | distinguish among various library functions, you can do so by their names. | |
1189 | Note that "library function" in this context means a function used to | |
1190 | perform arithmetic, whose name is known specially in the compiler and was | |
1191 | not mentioned in the C code being compiled. | |
1192 | ||
1193 | STACK-SIZE is the number of bytes of arguments passed on the stack. If a | |
1194 | variable number of bytes is passed, it is zero, and argument popping will | |
1195 | always be the responsibility of the calling function. | |
1196 | ||
4912a07c | 1197 | On the VAX, all functions always pop their arguments, so the definition of |
4b58290f GK |
1198 | this macro is STACK-SIZE. On the 68000, using the standard calling |
1199 | convention, no functions pop their arguments, so the value of the macro is | |
1200 | always 0 in this case. But an alternative calling convention is available | |
1201 | in which functions that take a fixed number of arguments pop them but other | |
1202 | functions (such as `printf') pop nothing (the caller pops all). When this | |
1203 | convention is in use, FUNTYPE is examined to determine whether a function | |
1204 | takes a fixed number of arguments. */ | |
1205 | #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACK_SIZE) 0 | |
1206 | ||
1207 | \f | |
1208 | /* Function Arguments in Registers */ | |
1209 | ||
da6e254e | 1210 | #define NUM_ARGUMENT_REGISTERS 6 |
4b58290f GK |
1211 | #define FIRST_ARGUMENT_REGISTER 2 |
1212 | ||
c6243b4c | 1213 | #define XSTORMY16_WORD_SIZE(TYPE, MODE) \ |
4b58290f GK |
1214 | ((((TYPE) ? int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) \ |
1215 | + 1) \ | |
1216 | / 2) | |
1217 | ||
1218 | /* A C expression that controls whether a function argument is passed in a | |
1219 | register, and which register. | |
1220 | ||
1221 | The arguments are CUM, of type CUMULATIVE_ARGS, which summarizes | |
1222 | (in a way defined by INIT_CUMULATIVE_ARGS and FUNCTION_ARG_ADVANCE) | |
1223 | all of the previous arguments so far passed in registers; MODE, the | |
1224 | machine mode of the argument; TYPE, the data type of the argument | |
1225 | as a tree node or 0 if that is not known (which happens for C | |
1226 | support library functions); and NAMED, which is 1 for an ordinary | |
1227 | argument and 0 for nameless arguments that correspond to `...' in | |
1228 | the called function's prototype. | |
1229 | ||
1230 | The value of the expression should either be a `reg' RTX for the hard | |
1231 | register in which to pass the argument, or zero to pass the argument on the | |
1232 | stack. | |
1233 | ||
4912a07c | 1234 | For machines like the VAX and 68000, where normally all arguments are |
4b58290f GK |
1235 | pushed, zero suffices as a definition. |
1236 | ||
1237 | The usual way to make the ANSI library `stdarg.h' work on a machine where | |
1238 | some arguments are usually passed in registers, is to cause nameless | |
1239 | arguments to be passed on the stack instead. This is done by making | |
1240 | `FUNCTION_ARG' return 0 whenever NAMED is 0. | |
1241 | ||
1242 | You may use the macro `MUST_PASS_IN_STACK (MODE, TYPE)' in the definition of | |
1243 | this macro to determine if this argument is of a type that must be passed in | |
1244 | the stack. If `REG_PARM_STACK_SPACE' is not defined and `FUNCTION_ARG' | |
1245 | returns non-zero for such an argument, the compiler will abort. If | |
1246 | `REG_PARM_STACK_SPACE' is defined, the argument will be computed in the | |
1247 | stack and then loaded into a register. */ | |
1248 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
1249 | ((MODE) == VOIDmode ? const0_rtx \ | |
c6243b4c | 1250 | : (CUM) + XSTORMY16_WORD_SIZE (TYPE, MODE) > NUM_ARGUMENT_REGISTERS ? 0 \ |
4b58290f GK |
1251 | : gen_rtx_REG (MODE, (CUM) + 2)) |
1252 | ||
1253 | /* Define this macro if the target machine has "register windows", so that the | |
1254 | register in which a function sees an arguments is not necessarily the same | |
1255 | as the one in which the caller passed the argument. | |
1256 | ||
1257 | For such machines, `FUNCTION_ARG' computes the register in which the caller | |
1258 | passes the value, and `FUNCTION_INCOMING_ARG' should be defined in a similar | |
1259 | fashion to tell the function being called where the arguments will arrive. | |
1260 | ||
1261 | If `FUNCTION_INCOMING_ARG' is not defined, `FUNCTION_ARG' serves both | |
1262 | purposes. */ | |
1263 | /* #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) */ | |
1264 | ||
1265 | /* A C expression for the number of words, at the beginning of an argument, | |
1266 | must be put in registers. The value must be zero for arguments that are | |
1267 | passed entirely in registers or that are entirely pushed on the stack. | |
1268 | ||
1269 | On some machines, certain arguments must be passed partially in registers | |
1270 | and partially in memory. On these machines, typically the first N words of | |
1271 | arguments are passed in registers, and the rest on the stack. If a | |
1272 | multi-word argument (a `double' or a structure) crosses that boundary, its | |
1273 | first few words must be passed in registers and the rest must be pushed. | |
1274 | This macro tells the compiler when this occurs, and how many of the words | |
1275 | should go in registers. | |
1276 | ||
1277 | `FUNCTION_ARG' for these arguments should return the first register to be | |
1278 | used by the caller for this argument; likewise `FUNCTION_INCOMING_ARG', for | |
1279 | the called function. */ | |
1280 | #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) 0 | |
1281 | ||
1282 | /* A C expression that indicates when an argument must be passed by reference. | |
1283 | If nonzero for an argument, a copy of that argument is made in memory and a | |
1284 | pointer to the argument is passed instead of the argument itself. The | |
1285 | pointer is passed in whatever way is appropriate for passing a pointer to | |
1286 | that type. | |
1287 | ||
1288 | On machines where `REG_PARM_STACK_SPACE' is not defined, a suitable | |
1289 | definition of this macro might be | |
1290 | #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \ | |
1291 | MUST_PASS_IN_STACK (MODE, TYPE) */ | |
1292 | #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) 0 | |
1293 | ||
1294 | /* If defined, a C expression that indicates when it is more | |
1295 | desirable to keep an argument passed by invisible reference as a | |
1296 | reference, rather than copying it to a pseudo register. */ | |
1297 | /* #define FUNCTION_ARG_KEEP_AS_REFERENCE(CUM, MODE, TYPE, NAMED) */ | |
1298 | ||
1299 | /* If defined, a C expression that indicates when it is the called function's | |
1300 | responsibility to make a copy of arguments passed by invisible reference. | |
1301 | Normally, the caller makes a copy and passes the address of the copy to the | |
1302 | routine being called. When FUNCTION_ARG_CALLEE_COPIES is defined and is | |
1303 | nonzero, the caller does not make a copy. Instead, it passes a pointer to | |
1304 | the "live" value. The called function must not modify this value. If it | |
1305 | can be determined that the value won't be modified, it need not make a copy; | |
1306 | otherwise a copy must be made. */ | |
1307 | /* #define FUNCTION_ARG_CALLEE_COPIES(CUM, MODE, TYPE, NAMED) */ | |
1308 | ||
1309 | /* A C type for declaring a variable that is used as the first argument of | |
1310 | `FUNCTION_ARG' and other related values. For some target machines, the type | |
1311 | `int' suffices and can hold the number of bytes of argument so far. | |
1312 | ||
1313 | There is no need to record in `CUMULATIVE_ARGS' anything about the arguments | |
1314 | that have been passed on the stack. The compiler has other variables to | |
1315 | keep track of that. For target machines on which all arguments are passed | |
1316 | on the stack, there is no need to store anything in `CUMULATIVE_ARGS'; | |
1317 | however, the data structure must exist and should not be empty, so use | |
1318 | `int'. | |
1319 | ||
1320 | For this platform, the value of CUMULATIVE_ARGS is the number of words | |
1321 | of arguments that have been passed in registers so far. */ | |
c8f863fc | 1322 | #define CUMULATIVE_ARGS int |
4b58290f GK |
1323 | |
1324 | /* A C statement (sans semicolon) for initializing the variable CUM for the | |
1325 | state at the beginning of the argument list. The variable has type | |
1326 | `CUMULATIVE_ARGS'. The value of FNTYPE is the tree node for the data type | |
1327 | of the function which will receive the args, or 0 if the args are to a | |
1328 | compiler support library function. The value of INDIRECT is nonzero when | |
1329 | processing an indirect call, for example a call through a function pointer. | |
1330 | The value of INDIRECT is zero for a call to an explicitly named function, a | |
1331 | library function call, or when `INIT_CUMULATIVE_ARGS' is used to find | |
1332 | arguments for the function being compiled. | |
1333 | ||
1334 | When processing a call to a compiler support library function, LIBNAME | |
1335 | identifies which one. It is a `symbol_ref' rtx which contains the name of | |
1336 | the function, as a string. LIBNAME is 0 when an ordinary C function call is | |
1337 | being processed. Thus, each time this macro is called, either LIBNAME or | |
1338 | FNTYPE is nonzero, but never both of them at once. */ | |
1339 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) (CUM) = 0 | |
1340 | ||
1341 | /* Like `INIT_CUMULATIVE_ARGS' but overrides it for the purposes of finding the | |
1342 | arguments for the function being compiled. If this macro is undefined, | |
1343 | `INIT_CUMULATIVE_ARGS' is used instead. | |
1344 | ||
1345 | The value passed for LIBNAME is always 0, since library routines with | |
1346 | special calling conventions are never compiled with GNU CC. The argument | |
1347 | LIBNAME exists for symmetry with `INIT_CUMULATIVE_ARGS'. */ | |
1348 | /* #define INIT_CUMULATIVE_INCOMING_ARGS(CUM, FNTYPE, LIBNAME) */ | |
1349 | ||
1350 | /* A C statement (sans semicolon) to update the summarizer variable CUM to | |
1351 | advance past an argument in the argument list. The values MODE, TYPE and | |
1352 | NAMED describe that argument. Once this is done, the variable CUM is | |
1353 | suitable for analyzing the *following* argument with `FUNCTION_ARG', etc. | |
1354 | ||
1355 | This macro need not do anything if the argument in question was passed on | |
1356 | the stack. The compiler knows how to track the amount of stack space used | |
1357 | for arguments without any special help. */ | |
1358 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
c6243b4c | 1359 | ((CUM) = xstormy16_function_arg_advance (CUM, MODE, TYPE, NAMED)) |
4b58290f GK |
1360 | |
1361 | /* If defined, a C expression which determines whether, and in which direction, | |
1362 | to pad out an argument with extra space. The value should be of type `enum | |
1363 | direction': either `upward' to pad above the argument, `downward' to pad | |
1364 | below, or `none' to inhibit padding. | |
1365 | ||
1366 | The *amount* of padding is always just enough to reach the next multiple of | |
1367 | `FUNCTION_ARG_BOUNDARY'; this macro does not control it. | |
1368 | ||
1369 | This macro has a default definition which is right for most systems. For | |
1370 | little-endian machines, the default is to pad upward. For big-endian | |
1371 | machines, the default is to pad downward for an argument of constant size | |
1372 | shorter than an `int', and upward otherwise. */ | |
1373 | /* #define FUNCTION_ARG_PADDING(MODE, TYPE) */ | |
1374 | ||
1375 | /* If defined, a C expression that gives the alignment boundary, in bits, of an | |
1376 | argument with the specified mode and type. If it is not defined, | |
1377 | `PARM_BOUNDARY' is used for all arguments. */ | |
1378 | /* #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) */ | |
1379 | ||
1380 | /* A C expression that is nonzero if REGNO is the number of a hard register in | |
1381 | which function arguments are sometimes passed. This does *not* include | |
1382 | implicit arguments such as the static chain and the structure-value address. | |
1383 | On many machines, no registers can be used for this purpose since all | |
1384 | function arguments are pushed on the stack. */ | |
1385 | #define FUNCTION_ARG_REGNO_P(REGNO) \ | |
1386 | ((REGNO) >= FIRST_ARGUMENT_REGISTER \ | |
1387 | && (REGNO) < FIRST_ARGUMENT_REGISTER + NUM_ARGUMENT_REGISTERS) | |
1388 | ||
1389 | \f | |
1390 | /* How Scalar Function Values are Returned */ | |
1391 | ||
1392 | /* The number of the hard register that is used to return a scalar value from a | |
1393 | function call. */ | |
1394 | #define RETURN_VALUE_REGNUM FIRST_ARGUMENT_REGISTER | |
1395 | ||
4b58290f GK |
1396 | /* A C expression to create an RTX representing the place where a function |
1397 | returns a value of data type VALTYPE. VALTYPE is a tree node representing a | |
1398 | data type. Write `TYPE_MODE (VALTYPE)' to get the machine mode used to | |
1399 | represent that type. On many machines, only the mode is relevant. | |
1400 | (Actually, on most machines, scalar values are returned in the same place | |
1401 | regardless of mode). | |
1402 | ||
1403 | If `PROMOTE_FUNCTION_RETURN' is defined, you must apply the same promotion | |
1404 | rules specified in `PROMOTE_MODE' if VALTYPE is a scalar type. | |
1405 | ||
1406 | If the precise function being called is known, FUNC is a tree node | |
1407 | (`FUNCTION_DECL') for it; otherwise, FUNC is a null pointer. This makes it | |
1408 | possible to use a different value-returning convention for specific | |
1409 | functions when all their calls are known. | |
1410 | ||
1411 | `FUNCTION_VALUE' is not used for return vales with aggregate data types, | |
1412 | because these are returned in another way. See `STRUCT_VALUE_REGNUM' and | |
1413 | related macros, below. */ | |
1414 | #define FUNCTION_VALUE(VALTYPE, FUNC) \ | |
c6243b4c | 1415 | xstormy16_function_value (VALTYPE, FUNC) |
4b58290f GK |
1416 | |
1417 | ||
1418 | /* Define this macro if the target machine has "register windows" so that the | |
1419 | register in which a function returns its value is not the same as the one in | |
1420 | which the caller sees the value. | |
1421 | ||
1422 | For such machines, `FUNCTION_VALUE' computes the register in which the | |
1423 | caller will see the value. `FUNCTION_OUTGOING_VALUE' should be defined in a | |
1424 | similar fashion to tell the function where to put the value. | |
1425 | ||
1426 | If `FUNCTION_OUTGOING_VALUE' is not defined, `FUNCTION_VALUE' serves both | |
1427 | purposes. | |
1428 | ||
1429 | `FUNCTION_OUTGOING_VALUE' is not used for return vales with aggregate data | |
1430 | types, because these are returned in another way. See `STRUCT_VALUE_REGNUM' | |
1431 | and related macros, below. */ | |
1432 | /* #define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) */ | |
1433 | ||
1434 | /* A C expression to create an RTX representing the place where a library | |
1435 | function returns a value of mode MODE. | |
1436 | ||
1437 | Note that "library function" in this context means a compiler support | |
1438 | routine, used to perform arithmetic, whose name is known specially by the | |
1439 | compiler and was not mentioned in the C code being compiled. | |
1440 | ||
1441 | The definition of `LIBRARY_VALUE' need not be concerned aggregate data | |
1442 | types, because none of the library functions returns such types. */ | |
1443 | #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RETURN_VALUE_REGNUM) | |
1444 | ||
1445 | /* A C expression that is nonzero if REGNO is the number of a hard register in | |
1446 | which the values of called function may come back. | |
1447 | ||
1448 | A register whose use for returning values is limited to serving as the | |
1449 | second of a pair (for a value of type `double', say) need not be recognized | |
1450 | by this macro. So for most machines, this definition suffices: | |
1451 | ||
1452 | #define FUNCTION_VALUE_REGNO_P(N) ((N) == RETURN) | |
1453 | ||
1454 | If the machine has register windows, so that the caller and the called | |
1455 | function use different registers for the return value, this macro should | |
1456 | recognize only the caller's register numbers. */ | |
1457 | #define FUNCTION_VALUE_REGNO_P(REGNO) ((REGNO) == RETURN_VALUE_REGNUM) | |
1458 | ||
1459 | /* Define this macro if `untyped_call' and `untyped_return' need more space | |
1460 | than is implied by `FUNCTION_VALUE_REGNO_P' for saving and restoring an | |
1461 | arbitrary return value. */ | |
1462 | /* #define APPLY_RESULT_SIZE */ | |
1463 | ||
1464 | \f | |
1465 | /* How Large Values are Returned */ | |
1466 | ||
1467 | /* A C expression which can inhibit the returning of certain function values in | |
1468 | registers, based on the type of value. A nonzero value says to return the | |
1469 | function value in memory, just as large structures are always returned. | |
1470 | Here TYPE will be a C expression of type `tree', representing the data type | |
1471 | of the value. | |
1472 | ||
1473 | Note that values of mode `BLKmode' must be explicitly handled by this macro. | |
1474 | Also, the option `-fpcc-struct-return' takes effect regardless of this | |
1475 | macro. On most systems, it is possible to leave the macro undefined; this | |
1476 | causes a default definition to be used, whose value is the constant 1 for | |
1477 | `BLKmode' values, and 0 otherwise. | |
1478 | ||
1479 | Do not use this macro to indicate that structures and unions should always | |
1480 | be returned in memory. You should instead use `DEFAULT_PCC_STRUCT_RETURN' | |
1481 | to indicate this. */ | |
1482 | #define RETURN_IN_MEMORY(TYPE) \ | |
1483 | (int_size_in_bytes (TYPE) > UNITS_PER_WORD * NUM_ARGUMENT_REGISTERS) | |
1484 | ||
1485 | /* Define this macro to be 1 if all structure and union return values must be | |
1486 | in memory. Since this results in slower code, this should be defined only | |
1487 | if needed for compatibility with other compilers or with an ABI. If you | |
1488 | define this macro to be 0, then the conventions used for structure and union | |
1489 | return values are decided by the `RETURN_IN_MEMORY' macro. | |
1490 | ||
1491 | If not defined, this defaults to the value 1. */ | |
da6e254e | 1492 | /* #define DEFAULT_PCC_STRUCT_RETURN 0 */ |
4b58290f GK |
1493 | |
1494 | /* If the structure value address is passed in a register, then | |
1495 | `STRUCT_VALUE_REGNUM' should be the number of that register. */ | |
1496 | /* #define STRUCT_VALUE_REGNUM */ | |
1497 | ||
1498 | /* If the structure value address is not passed in a register, define | |
1499 | `STRUCT_VALUE' as an expression returning an RTX for the place where the | |
1500 | address is passed. If it returns 0, the address is passed as an "invisible" | |
1501 | first argument. */ | |
1502 | #define STRUCT_VALUE 0 | |
1503 | ||
1504 | /* On some architectures the place where the structure value address is found | |
1505 | by the called function is not the same place that the caller put it. This | |
1506 | can be due to register windows, or it could be because the function prologue | |
1507 | moves it to a different place. | |
1508 | ||
1509 | If the incoming location of the structure value address is in a register, | |
1510 | define this macro as the register number. */ | |
1511 | /* #define STRUCT_VALUE_INCOMING_REGNUM */ | |
1512 | ||
1513 | /* If the incoming location is not a register, then you should define | |
1514 | `STRUCT_VALUE_INCOMING' as an expression for an RTX for where the called | |
1515 | function should find the value. If it should find the value on the stack, | |
1516 | define this to create a `mem' which refers to the frame pointer. A | |
1517 | definition of 0 means that the address is passed as an "invisible" first | |
1518 | argument. */ | |
1519 | /* #define STRUCT_VALUE_INCOMING */ | |
1520 | ||
1521 | /* Define this macro if the usual system convention on the target machine for | |
1522 | returning structures and unions is for the called function to return the | |
1523 | address of a static variable containing the value. | |
1524 | ||
1525 | Do not define this if the usual system convention is for the caller to pass | |
1526 | an address to the subroutine. | |
1527 | ||
1528 | This macro has effect in `-fpcc-struct-return' mode, but it does nothing | |
1529 | when you use `-freg-struct-return' mode. */ | |
1530 | /* #define PCC_STATIC_STRUCT_RETURN */ | |
1531 | ||
1532 | \f | |
1533 | /* Caller-Saves Register Allocation */ | |
1534 | ||
1535 | /* Define this macro if function calls on the target machine do not preserve | |
1536 | any registers; in other words, if `CALL_USED_REGISTERS' has 1 for all | |
1537 | registers. This macro enables `-fcaller-saves' by default. Eventually that | |
1538 | option will be enabled by default on all machines and both the option and | |
1539 | this macro will be eliminated. */ | |
1540 | /* #define DEFAULT_CALLER_SAVES */ | |
1541 | ||
1542 | /* A C expression to determine whether it is worthwhile to consider placing a | |
1543 | pseudo-register in a call-clobbered hard register and saving and restoring | |
1544 | it around each function call. The expression should be 1 when this is worth | |
1545 | doing, and 0 otherwise. | |
1546 | ||
1547 | If you don't define this macro, a default is used which is good on most | |
1548 | machines: `4 * CALLS < REFS'. */ | |
1549 | /* #define CALLER_SAVE_PROFITABLE(REFS, CALLS) */ | |
1550 | ||
1551 | \f | |
1552 | /* Function Entry and Exit */ | |
1553 | ||
1554 | /* Define this macro as a C expression that is nonzero if the return | |
1555 | instruction or the function epilogue ignores the value of the stack pointer; | |
1556 | in other words, if it is safe to delete an instruction to adjust the stack | |
1557 | pointer before a return from the function. | |
1558 | ||
1559 | Note that this macro's value is relevant only for functions for which frame | |
1560 | pointers are maintained. It is never safe to delete a final stack | |
1561 | adjustment in a function that has no frame pointer, and the compiler knows | |
1562 | this regardless of `EXIT_IGNORE_STACK'. */ | |
1563 | /* #define EXIT_IGNORE_STACK */ | |
1564 | ||
1565 | /* Define this macro as a C expression that is nonzero for registers | |
1566 | are used by the epilogue or the `return' pattern. The stack and | |
1567 | frame pointer registers are already be assumed to be used as | |
1568 | needed. */ | |
1569 | #define EPILOGUE_USES(REGNO) \ | |
c6243b4c | 1570 | xstormy16_epilogue_uses (REGNO) |
4b58290f GK |
1571 | |
1572 | /* Define this macro if the function epilogue contains delay slots to which | |
1573 | instructions from the rest of the function can be "moved". The definition | |
1574 | should be a C expression whose value is an integer representing the number | |
1575 | of delay slots there. */ | |
1576 | /* #define DELAY_SLOTS_FOR_EPILOGUE */ | |
1577 | ||
1578 | /* A C expression that returns 1 if INSN can be placed in delay slot number N | |
1579 | of the epilogue. | |
1580 | ||
1581 | The argument N is an integer which identifies the delay slot now being | |
1582 | considered (since different slots may have different rules of eligibility). | |
1583 | It is never negative and is always less than the number of epilogue delay | |
1584 | slots (what `DELAY_SLOTS_FOR_EPILOGUE' returns). If you reject a particular | |
1585 | insn for a given delay slot, in principle, it may be reconsidered for a | |
1586 | subsequent delay slot. Also, other insns may (at least in principle) be | |
1587 | considered for the so far unfilled delay slot. | |
1588 | ||
1589 | The insns accepted to fill the epilogue delay slots are put in an | |
1590 | RTL list made with `insn_list' objects, stored in the variable | |
1591 | `current_function_epilogue_delay_list'. The insn for the first | |
1592 | delay slot comes first in the list. Your definition of the macro | |
1593 | `FUNCTION_EPILOGUE' should fill the delay slots by outputting the | |
1594 | insns in this list, usually by calling `final_scan_insn'. | |
1595 | ||
1596 | You need not define this macro if you did not define | |
1597 | `DELAY_SLOTS_FOR_EPILOGUE'. */ | |
1598 | /* #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) */ | |
1599 | ||
1600 | /* A C compound statement that outputs the assembler code for a thunk function, | |
1601 | used to implement C++ virtual function calls with multiple inheritance. The | |
1602 | thunk acts as a wrapper around a virtual function, adjusting the implicit | |
1603 | object parameter before handing control off to the real function. | |
1604 | ||
1605 | First, emit code to add the integer DELTA to the location that contains the | |
1606 | incoming first argument. Assume that this argument contains a pointer, and | |
1607 | is the one used to pass the `this' pointer in C++. This is the incoming | |
1608 | argument *before* the function prologue, e.g. `%o0' on a sparc. The | |
1609 | addition must preserve the values of all other incoming arguments. | |
1610 | ||
1611 | After the addition, emit code to jump to FUNCTION, which is a | |
1612 | `FUNCTION_DECL'. This is a direct pure jump, not a call, and does not touch | |
1613 | the return address. Hence returning from FUNCTION will return to whoever | |
1614 | called the current `thunk'. | |
1615 | ||
41441dc7 NB |
1616 | The effect must be as if @var{function} had been called directly |
1617 | with the adjusted first argument. This macro is responsible for | |
1618 | emitting all of the code for a thunk function; | |
1619 | TARGET_ASM_FUNCTION_PROLOGUE and TARGET_ASM_FUNCTION_EPILOGUE are | |
1620 | not invoked. | |
4b58290f GK |
1621 | |
1622 | The THUNK_FNDECL is redundant. (DELTA and FUNCTION have already been | |
1623 | extracted from it.) It might possibly be useful on some targets, but | |
1624 | probably not. | |
1625 | ||
1626 | If you do not define this macro, the target-independent code in the C++ | |
1627 | frontend will generate a less efficient heavyweight thunk that calls | |
1628 | FUNCTION instead of jumping to it. The generic approach does not support | |
1629 | varargs. */ | |
1630 | #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \ | |
c6243b4c | 1631 | xstormy16_asm_output_mi_thunk (FILE, THUNK_FNDECL, DELTA, FUNCTION) |
4b58290f GK |
1632 | |
1633 | \f | |
1634 | /* Generating Code for Profiling. */ | |
1635 | ||
1636 | /* A C statement or compound statement to output to FILE some assembler code to | |
1637 | call the profiling subroutine `mcount'. Before calling, the assembler code | |
1638 | must load the address of a counter variable into a register where `mcount' | |
1639 | expects to find the address. The name of this variable is `LP' followed by | |
1640 | the number LABELNO, so you would generate the name using `LP%d' in a | |
1641 | `fprintf'. | |
1642 | ||
1643 | The details of how the address should be passed to `mcount' are determined | |
1644 | by your operating system environment, not by GNU CC. To figure them out, | |
1645 | compile a small program for profiling using the system's installed C | |
1646 | compiler and look at the assembler code that results. | |
1647 | ||
1648 | This declaration must be present, but it can be an abort if profiling is | |
1649 | not implemented. */ | |
1650 | ||
1651 | #define FUNCTION_PROFILER(FILE, LABELNO) abort () | |
1652 | ||
1653 | /* Define this macro if the code for function profiling should come before the | |
1654 | function prologue. Normally, the profiling code comes after. */ | |
1655 | /* #define PROFILE_BEFORE_PROLOGUE */ | |
1656 | ||
4b58290f GK |
1657 | \f |
1658 | /* If the target has particular reasons why a function cannot be inlined, | |
1659 | it may define the TARGET_CANNOT_INLINE_P. This macro takes one argument, | |
1660 | the DECL describing the function. The function should NULL if the function | |
1661 | *can* be inlined. Otherwise it should return a pointer to a string containing | |
1662 | a message describing why the function could not be inlined. The message will | |
1663 | displayed if the '-Winline' command line switch has been given. If the message | |
1664 | contains a '%s' sequence, this will be replaced by the name of the function. */ | |
c6243b4c | 1665 | /* #define TARGET_CANNOT_INLINE_P(FN_DECL) xstormy16_cannot_inline_p (FN_DECL) */ |
4b58290f GK |
1666 | \f |
1667 | /* Implementing the Varargs Macros. */ | |
1668 | ||
1669 | /* If defined, is a C expression that produces the machine-specific code for a | |
1670 | call to `__builtin_saveregs'. This code will be moved to the very beginning | |
1671 | of the function, before any parameter access are made. The return value of | |
1672 | this function should be an RTX that contains the value to use as the return | |
1673 | of `__builtin_saveregs'. | |
1674 | ||
1675 | If this macro is not defined, the compiler will output an ordinary call to | |
1676 | the library function `__builtin_saveregs'. */ | |
1677 | /* #define EXPAND_BUILTIN_SAVEREGS() */ | |
1678 | ||
1679 | /* This macro offers an alternative to using `__builtin_saveregs' and defining | |
1680 | the macro `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register | |
1681 | arguments into the stack so that all the arguments appear to have been | |
1682 | passed consecutively on the stack. Once this is done, you can use the | |
1683 | standard implementation of varargs that works for machines that pass all | |
1684 | their arguments on the stack. | |
1685 | ||
1686 | The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, containing | |
1687 | the values that obtain after processing of the named arguments. The | |
1688 | arguments MODE and TYPE describe the last named argument--its machine mode | |
1689 | and its data type as a tree node. | |
1690 | ||
1691 | The macro implementation should do two things: first, push onto the stack | |
1692 | all the argument registers *not* used for the named arguments, and second, | |
1693 | store the size of the data thus pushed into the `int'-valued variable whose | |
1694 | name is supplied as the argument PRETEND_ARGS_SIZE. The value that you | |
1695 | store here will serve as additional offset for setting up the stack frame. | |
1696 | ||
1697 | Because you must generate code to push the anonymous arguments at compile | |
1698 | time without knowing their data types, `SETUP_INCOMING_VARARGS' is only | |
1699 | useful on machines that have just a single category of argument register and | |
1700 | use it uniformly for all data types. | |
1701 | ||
1702 | If the argument SECOND_TIME is nonzero, it means that the arguments of the | |
1703 | function are being analyzed for the second time. This happens for an inline | |
1704 | function, which is not actually compiled until the end of the source file. | |
1705 | The macro `SETUP_INCOMING_VARARGS' should not generate any instructions in | |
1706 | this case. */ | |
1707 | #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_ARGS_SIZE, SECOND_TIME) \ | |
1708 | if (! SECOND_TIME) \ | |
c6243b4c | 1709 | xstormy16_setup_incoming_varargs (ARGS_SO_FAR, MODE, TYPE, & PRETEND_ARGS_SIZE) |
4b58290f GK |
1710 | |
1711 | /* Define this macro if the location where a function argument is passed | |
1712 | depends on whether or not it is a named argument. | |
1713 | ||
1714 | This macro controls how the NAMED argument to `FUNCTION_ARG' is set for | |
1715 | varargs and stdarg functions. With this macro defined, the NAMED argument | |
1716 | is always true for named arguments, and false for unnamed arguments. If | |
1717 | this is not defined, but `SETUP_INCOMING_VARARGS' is defined, then all | |
1718 | arguments are treated as named. Otherwise, all named arguments except the | |
1719 | last are treated as named. */ | |
1720 | /* #define STRICT_ARGUMENT_NAMING 1 */ | |
1721 | ||
1722 | /* Build up the stdarg/varargs va_list type tree, assinging it to NODE. If not | |
1723 | defined, it is assumed that va_list is a void * pointer. */ | |
1724 | #define BUILD_VA_LIST_TYPE(NODE) \ | |
c6243b4c | 1725 | ((NODE) = xstormy16_build_va_list ()) |
4b58290f GK |
1726 | |
1727 | /* Implement the stdarg/varargs va_start macro. STDARG_P is non-zero if this | |
1728 | is stdarg.h instead of varargs.h. VALIST is the tree of the va_list | |
1729 | variable to initialize. NEXTARG is the machine independent notion of the | |
1730 | 'next' argument after the variable arguments. If not defined, a standard | |
1731 | implementation will be defined that works for arguments passed on the stack. */ | |
e5faf155 ZW |
1732 | #define EXPAND_BUILTIN_VA_START(VALIST, NEXTARG) \ |
1733 | xstormy16_expand_builtin_va_start (VALIST, NEXTARG) | |
4b58290f GK |
1734 | |
1735 | /* Implement the stdarg/varargs va_arg macro. VALIST is the variable of type | |
1736 | va_list as a tree, TYPE is the type passed to va_arg. */ | |
1737 | #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \ | |
c6243b4c | 1738 | xstormy16_expand_builtin_va_arg (VALIST, TYPE) |
4b58290f GK |
1739 | |
1740 | /* Implement the stdarg/varargs va_end macro. VALIST is the variable of type | |
1741 | va_list as a tree. */ | |
1742 | /* #define EXPAND_BUILTIN_VA_END(VALIST) */ | |
1743 | ||
1744 | \f | |
1745 | /* Trampolines for Nested Functions. */ | |
1746 | ||
1747 | /* A C statement to output, on the stream FILE, assembler code for a block of | |
1748 | data that contains the constant parts of a trampoline. This code should not | |
1749 | include a label--the label is taken care of automatically. */ | |
1750 | /* #define TRAMPOLINE_TEMPLATE(FILE) */ | |
1751 | ||
1752 | /* The name of a subroutine to switch to the section in which the trampoline | |
1753 | template is to be placed. The default is a value of `readonly_data_section', | |
1754 | which places the trampoline in the section containing read-only data. */ | |
1755 | /* #define TRAMPOLINE_SECTION */ | |
1756 | ||
1757 | /* A C expression for the size in bytes of the trampoline, as an integer. */ | |
1758 | #define TRAMPOLINE_SIZE 8 | |
1759 | ||
1760 | /* Alignment required for trampolines, in bits. | |
1761 | ||
1762 | If you don't define this macro, the value of `BIGGEST_ALIGNMENT' is used for | |
1763 | aligning trampolines. */ | |
1764 | #define TRAMPOLINE_ALIGNMENT 16 | |
1765 | ||
1766 | /* A C statement to initialize the variable parts of a trampoline. ADDR is an | |
1767 | RTX for the address of the trampoline; FNADDR is an RTX for the address of | |
1768 | the nested function; STATIC_CHAIN is an RTX for the static chain value that | |
1769 | should be passed to the function when it is called. */ | |
1770 | #define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \ | |
c6243b4c | 1771 | xstormy16_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN) |
4b58290f GK |
1772 | |
1773 | /* A C expression to allocate run-time space for a trampoline. The expression | |
1774 | value should be an RTX representing a memory reference to the space for the | |
1775 | trampoline. | |
1776 | ||
1777 | If this macro is not defined, by default the trampoline is allocated as a | |
1778 | stack slot. This default is right for most machines. The exceptions are | |
1779 | machines where it is impossible to execute instructions in the stack area. | |
1780 | On such machines, you may have to implement a separate stack, using this | |
41441dc7 NB |
1781 | macro in conjunction with `TARGET_ASM_FUNCTION_PROLOGUE' and |
1782 | `TARGET_ASM_FUNCTION_EPILOGUE'. | |
4b58290f GK |
1783 | |
1784 | FP points to a data structure, a `struct function', which describes the | |
1785 | compilation status of the immediate containing function of the function | |
1786 | which the trampoline is for. Normally (when `ALLOCATE_TRAMPOLINE' is not | |
1787 | defined), the stack slot for the trampoline is in the stack frame of this | |
1788 | containing function. Other allocation strategies probably must do something | |
1789 | analogous with this information. */ | |
1790 | /* #define ALLOCATE_TRAMPOLINE(FP) */ | |
1791 | ||
1792 | /* Implementing trampolines is difficult on many machines because they have | |
1793 | separate instruction and data caches. Writing into a stack location fails | |
1794 | to clear the memory in the instruction cache, so when the program jumps to | |
1795 | that location, it executes the old contents. | |
1796 | ||
1797 | Here are two possible solutions. One is to clear the relevant parts of the | |
1798 | instruction cache whenever a trampoline is set up. The other is to make all | |
1799 | trampolines identical, by having them jump to a standard subroutine. The | |
1800 | former technique makes trampoline execution faster; the latter makes | |
1801 | initialization faster. | |
1802 | ||
1803 | To clear the instruction cache when a trampoline is initialized, define the | |
1804 | following macros which describe the shape of the cache. */ | |
1805 | ||
1806 | /* The total size in bytes of the cache. */ | |
1807 | /* #define INSN_CACHE_SIZE */ | |
1808 | ||
1809 | /* The length in bytes of each cache line. The cache is divided into cache | |
1810 | lines which are disjoint slots, each holding a contiguous chunk of data | |
1811 | fetched from memory. Each time data is brought into the cache, an entire | |
1812 | line is read at once. The data loaded into a cache line is always aligned | |
1813 | on a boundary equal to the line size. */ | |
1814 | /* #define INSN_CACHE_LINE_WIDTH */ | |
1815 | ||
1816 | /* The number of alternative cache lines that can hold any particular memory | |
1817 | location. */ | |
1818 | /* #define INSN_CACHE_DEPTH */ | |
1819 | ||
1820 | /* Alternatively, if the machine has system calls or instructions to clear the | |
1821 | instruction cache directly, you can define the following macro. */ | |
1822 | ||
1823 | /* If defined, expands to a C expression clearing the *instruction cache* in | |
1824 | the specified interval. If it is not defined, and the macro INSN_CACHE_SIZE | |
1825 | is defined, some generic code is generated to clear the cache. The | |
1826 | definition of this macro would typically be a series of `asm' statements. | |
1827 | Both BEG and END are both pointer expressions. */ | |
1828 | /* #define CLEAR_INSN_CACHE (BEG, END) */ | |
1829 | ||
1830 | /* To use a standard subroutine, define the following macro. In addition, you | |
1831 | must make sure that the instructions in a trampoline fill an entire cache | |
1832 | line with identical instructions, or else ensure that the beginning of the | |
1833 | trampoline code is always aligned at the same point in its cache line. Look | |
1834 | in `m68k.h' as a guide. */ | |
1835 | ||
1836 | /* Define this macro if trampolines need a special subroutine to do their work. | |
1837 | The macro should expand to a series of `asm' statements which will be | |
1838 | compiled with GNU CC. They go in a library function named | |
1839 | `__transfer_from_trampoline'. | |
1840 | ||
1841 | If you need to avoid executing the ordinary prologue code of a compiled C | |
1842 | function when you jump to the subroutine, you can do so by placing a special | |
1843 | label of your own in the assembler code. Use one `asm' statement to | |
1844 | generate an assembler label, and another to make the label global. Then | |
1845 | trampolines can use that label to jump directly to your special assembler | |
1846 | code. */ | |
1847 | /* #define TRANSFER_FROM_TRAMPOLINE */ | |
1848 | ||
1849 | \f | |
1850 | /* Implicit Calls to Library Routines */ | |
1851 | ||
1852 | /* A C string constant giving the name of the function to call for | |
1853 | multiplication of one signed full-word by another. If you do not define | |
1854 | this macro, the default name is used, which is `__mulsi3', a function | |
1855 | defined in `libgcc.a'. */ | |
1856 | /* #define MULSI3_LIBCALL */ | |
1857 | ||
1858 | /* A C string constant giving the name of the function to call for division of | |
1859 | one signed full-word by another. If you do not define this macro, the | |
1860 | default name is used, which is `__divsi3', a function defined in `libgcc.a'. */ | |
1861 | /* #define DIVSI3_LIBCALL */ | |
1862 | ||
1863 | /* A C string constant giving the name of the function to call for division of | |
1864 | one unsigned full-word by another. If you do not define this macro, the | |
1865 | default name is used, which is `__udivsi3', a function defined in | |
1866 | `libgcc.a'. */ | |
1867 | /* #define UDIVSI3_LIBCALL */ | |
1868 | ||
1869 | /* A C string constant giving the name of the function to call for the | |
1870 | remainder in division of one signed full-word by another. If you do not | |
1871 | define this macro, the default name is used, which is `__modsi3', a function | |
1872 | defined in `libgcc.a'. */ | |
1873 | /* #define MODSI3_LIBCALL */ | |
1874 | ||
1875 | /* A C string constant giving the name of the function to call for the | |
1876 | remainder in division of one unsigned full-word by another. If you do not | |
1877 | define this macro, the default name is used, which is `__umodsi3', a | |
1878 | function defined in `libgcc.a'. */ | |
1879 | /* #define UMODSI3_LIBCALL */ | |
1880 | ||
1881 | /* A C string constant giving the name of the function to call for | |
1882 | multiplication of one signed double-word by another. If you do not define | |
1883 | this macro, the default name is used, which is `__muldi3', a function | |
1884 | defined in `libgcc.a'. */ | |
1885 | /* #define MULDI3_LIBCALL */ | |
1886 | ||
1887 | /* A C string constant giving the name of the function to call for division of | |
1888 | one signed double-word by another. If you do not define this macro, the | |
1889 | default name is used, which is `__divdi3', a function defined in `libgcc.a'. */ | |
1890 | /* #define DIVDI3_LIBCALL */ | |
1891 | ||
1892 | /* A C string constant giving the name of the function to call for division of | |
1893 | one unsigned full-word by another. If you do not define this macro, the | |
1894 | default name is used, which is `__udivdi3', a function defined in | |
1895 | `libgcc.a'. */ | |
1896 | /* #define UDIVDI3_LIBCALL */ | |
1897 | ||
1898 | /* A C string constant giving the name of the function to call for the | |
1899 | remainder in division of one signed double-word by another. If you do not | |
1900 | define this macro, the default name is used, which is `__moddi3', a function | |
1901 | defined in `libgcc.a'. */ | |
1902 | /* #define MODDI3_LIBCALL */ | |
1903 | ||
1904 | /* A C string constant giving the name of the function to call for the | |
1905 | remainder in division of one unsigned full-word by another. If you do not | |
1906 | define this macro, the default name is used, which is `__umoddi3', a | |
1907 | function defined in `libgcc.a'. */ | |
1908 | /* #define UMODDI3_LIBCALL */ | |
1909 | ||
1910 | /* Define this macro as a C statement that declares additional library routines | |
1911 | renames existing ones. `init_optabs' calls this macro after initializing all | |
1912 | the normal library routines. */ | |
1913 | /* #define INIT_TARGET_OPTABS */ | |
1914 | ||
1915 | /* The value of `EDOM' on the target machine, as a C integer constant | |
1916 | expression. If you don't define this macro, GNU CC does not attempt to | |
1917 | deposit the value of `EDOM' into `errno' directly. Look in | |
1918 | `/usr/include/errno.h' to find the value of `EDOM' on your system. | |
1919 | ||
1920 | If you do not define `TARGET_EDOM', then compiled code reports domain errors | |
1921 | by calling the library function and letting it report the error. If | |
1922 | mathematical functions on your system use `matherr' when there is an error, | |
1923 | then you should leave `TARGET_EDOM' undefined so that `matherr' is used | |
1924 | normally. */ | |
1925 | /* #define TARGET_EDOM */ | |
1926 | ||
1927 | /* Define this macro as a C expression to create an rtl expression that refers | |
1928 | to the global "variable" `errno'. (On certain systems, `errno' may not | |
1929 | actually be a variable.) If you don't define this macro, a reasonable | |
1930 | default is used. */ | |
1931 | /* #define GEN_ERRNO_RTX */ | |
1932 | ||
1933 | /* Define this macro if GNU CC should generate calls to the System V (and ANSI | |
1934 | C) library functions `memcpy' and `memset' rather than the BSD functions | |
1935 | `bcopy' and `bzero'. | |
1936 | ||
1937 | Defined in svr4.h. */ | |
1938 | #define TARGET_MEM_FUNCTIONS | |
1939 | ||
1940 | /* Define this macro if only `float' arguments cannot be passed to library | |
1941 | routines (so they must be converted to `double'). This macro affects both | |
1942 | how library calls are generated and how the library routines in `libgcc1.c' | |
1943 | accept their arguments. It is useful on machines where floating and fixed | |
1944 | point arguments are passed differently, such as the i860. */ | |
1945 | /* #define LIBGCC_NEEDS_DOUBLE */ | |
1946 | ||
1947 | /* Define this macro to override the type used by the library routines to pick | |
1948 | up arguments of type `float'. (By default, they use a union of `float' and | |
1949 | `int'.) | |
1950 | ||
1951 | The obvious choice would be `float'--but that won't work with traditional C | |
1952 | compilers that expect all arguments declared as `float' to arrive as | |
1953 | `double'. To avoid this conversion, the library routines ask for the value | |
1954 | as some other type and then treat it as a `float'. | |
1955 | ||
1956 | On some systems, no other type will work for this. For these systems, you | |
1957 | must use `LIBGCC_NEEDS_DOUBLE' instead, to force conversion of the values | |
1958 | `double' before they are passed. */ | |
1959 | /* #define FLOAT_ARG_TYPE */ | |
1960 | ||
1961 | /* Define this macro to override the way library routines redesignate a `float' | |
1962 | argument as a `float' instead of the type it was passed as. The default is | |
1963 | an expression which takes the `float' field of the union. */ | |
1964 | /* #define FLOATIFY(PASSED_VALUE) */ | |
1965 | ||
1966 | /* Define this macro to override the type used by the library routines to | |
1967 | return values that ought to have type `float'. (By default, they use | |
1968 | `int'.) | |
1969 | ||
1970 | The obvious choice would be `float'--but that won't work with traditional C | |
1971 | compilers gratuitously convert values declared as `float' into `double'. */ | |
1972 | /* #define FLOAT_VALUE_TYPE */ | |
1973 | ||
1974 | /* Define this macro to override the way the value of a `float'-returning | |
1975 | library routine should be packaged in order to return it. These functions | |
1976 | are actually declared to return type `FLOAT_VALUE_TYPE' (normally `int'). | |
1977 | ||
1978 | These values can't be returned as type `float' because traditional C | |
1979 | compilers would gratuitously convert the value to a `double'. | |
1980 | ||
1981 | A local variable named `intify' is always available when the macro `INTIFY' | |
1982 | is used. It is a union of a `float' field named `f' and a field named `i' | |
1983 | whose type is `FLOAT_VALUE_TYPE' or `int'. | |
1984 | ||
1985 | If you don't define this macro, the default definition works by copying the | |
1986 | value through that union. */ | |
1987 | /* #define INTIFY(FLOAT_VALUE) */ | |
1988 | ||
1989 | /* Define this macro as the name of the data type corresponding to `SImode' in | |
1990 | the system's own C compiler. | |
1991 | ||
1992 | You need not define this macro if that type is `long int', as it usually is. */ | |
1993 | /* #define nongcc_SI_type */ | |
1994 | ||
1995 | /* Define this macro as the name of the data type corresponding to the | |
1996 | word_mode in the system's own C compiler. | |
1997 | ||
1998 | You need not define this macro if that type is `long int', as it usually is. */ | |
1999 | /* #define nongcc_word_type */ | |
2000 | ||
2001 | /* Define these macros to supply explicit C statements to carry out various | |
2002 | arithmetic operations on types `float' and `double' in the library routines | |
2003 | in `libgcc1.c'. See that file for a full list of these macros and their | |
2004 | arguments. | |
2005 | ||
2006 | On most machines, you don't need to define any of these macros, because the | |
2007 | C compiler that comes with the system takes care of doing them. */ | |
b1c9bc51 | 2008 | /* #define perform_... */ |
4b58290f GK |
2009 | |
2010 | /* Define this macro to generate code for Objective C message sending using the | |
2011 | calling convention of the NeXT system. This calling convention involves | |
2012 | passing the object, the selector and the method arguments all at once to the | |
2013 | method-lookup library function. | |
2014 | ||
2015 | The default calling convention passes just the object and the selector to | |
2016 | the lookup function, which returns a pointer to the method. */ | |
2017 | /* #define NEXT_OBJC_RUNTIME */ | |
2018 | ||
2019 | \f | |
2020 | /* Addressing Modes */ | |
2021 | ||
2022 | /* Define this macro if the machine supports post-increment addressing. */ | |
2023 | #define HAVE_POST_INCREMENT 1 | |
2024 | ||
2025 | /* Similar for other kinds of addressing. */ | |
2026 | /* #define HAVE_PRE_INCREMENT 1 */ | |
2027 | /* #define HAVE_POST_DECREMENT 1 */ | |
2028 | #define HAVE_PRE_DECREMENT 1 | |
2029 | ||
2030 | /* A C expression that is 1 if the RTX X is a constant which is a valid | |
2031 | address. On most machines, this can be defined as `CONSTANT_P (X)', but a | |
2032 | few machines are more restrictive in which constant addresses are supported. | |
2033 | ||
2034 | `CONSTANT_P' accepts integer-values expressions whose values are not | |
2035 | explicitly known, such as `symbol_ref', `label_ref', and `high' expressions | |
2036 | and `const' arithmetic expressions, in addition to `const_int' and | |
2037 | `const_double' expressions. */ | |
2038 | #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X) | |
2039 | ||
2040 | /* A number, the maximum number of registers that can appear in a valid memory | |
2041 | address. Note that it is up to you to specify a value equal to the maximum | |
2042 | number that `GO_IF_LEGITIMATE_ADDRESS' would ever accept. */ | |
2043 | #define MAX_REGS_PER_ADDRESS 1 | |
2044 | ||
2045 | /* A C compound statement with a conditional `goto LABEL;' executed if X (an | |
2046 | RTX) is a legitimate memory address on the target machine for a memory | |
fb49053f | 2047 | operand of mode MODE. */ |
4b58290f GK |
2048 | #ifdef REG_OK_STRICT |
2049 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ | |
2050 | do { \ | |
c6243b4c | 2051 | if (xstormy16_legitimate_address_p (MODE, X, 1)) \ |
4b58290f GK |
2052 | goto LABEL; \ |
2053 | } while (0) | |
2054 | #else | |
2055 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ | |
2056 | do { \ | |
c6243b4c | 2057 | if (xstormy16_legitimate_address_p (MODE, X, 0)) \ |
4b58290f GK |
2058 | goto LABEL; \ |
2059 | } while (0) | |
2060 | #endif | |
2061 | /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for | |
2062 | use as a base register. For hard registers, it should always accept those | |
2063 | which the hardware permits and reject the others. Whether the macro accepts | |
2064 | or rejects pseudo registers must be controlled by `REG_OK_STRICT' as | |
2065 | described above. This usually requires two variant definitions, of which | |
2066 | `REG_OK_STRICT' controls the one actually used. */ | |
2067 | #ifdef REG_OK_STRICT | |
2068 | #define REG_OK_FOR_BASE_P(X) \ | |
2069 | (REGNO_OK_FOR_BASE_P (REGNO (X)) && (REGNO (X) < FIRST_PSEUDO_REGISTER)) | |
2070 | #else | |
2071 | #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) | |
2072 | #endif | |
2073 | ||
2074 | /* A C expression that is nonzero if X (assumed to be a `reg' RTX) is valid for | |
2075 | use as an index register. | |
2076 | ||
2077 | The difference between an index register and a base register is that the | |
2078 | index register may be scaled. If an address involves the sum of two | |
2079 | registers, neither one of them scaled, then either one may be labeled the | |
2080 | "base" and the other the "index"; but whichever labeling is used must fit | |
2081 | the machine's constraints of which registers may serve in each capacity. | |
2082 | The compiler will try both labelings, looking for one that is valid, and | |
2083 | will reload one or both registers only if neither labeling works. */ | |
2084 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) | |
2085 | ||
2086 | /* A C compound statement that attempts to replace X with a valid memory | |
2087 | address for an operand of mode MODE. WIN will be a C statement label | |
2088 | elsewhere in the code; the macro definition may use | |
2089 | ||
2090 | GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN); | |
2091 | ||
2092 | to avoid further processing if the address has become legitimate. | |
2093 | ||
2094 | X will always be the result of a call to `break_out_memory_refs', and OLDX | |
2095 | will be the operand that was given to that function to produce X. | |
2096 | ||
2097 | The code generated by this macro should not alter the substructure of X. If | |
2098 | it transforms X into a more legitimate form, it should assign X (which will | |
2099 | always be a C variable) a new value. | |
2100 | ||
2101 | It is not necessary for this macro to come up with a legitimate address. | |
2102 | The compiler has standard ways of doing so in all cases. In fact, it is | |
2103 | safe for this macro to do nothing. But often a machine-dependent strategy | |
2104 | can generate better code. */ | |
2105 | #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) | |
2106 | ||
2107 | /* A C statement or compound statement with a conditional `goto LABEL;' | |
2108 | executed if memory address X (an RTX) can have different meanings depending | |
2109 | on the machine mode of the memory reference it is used for or if the address | |
2110 | is valid for some modes but not others. | |
2111 | ||
2112 | Autoincrement and autodecrement addresses typically have mode-dependent | |
2113 | effects because the amount of the increment or decrement is the size of the | |
2114 | operand being addressed. Some machines have other mode-dependent addresses. | |
2115 | Many RISC machines have no mode-dependent addresses. | |
2116 | ||
2117 | You may assume that ADDR is a valid address for the machine. | |
2118 | ||
2119 | On this chip, this is true if the address is valid with an offset | |
2120 | of 0 but not of 6, because in that case it cannot be used as an | |
2121 | address for DImode or DFmode, or if the address is a post-increment | |
2122 | or pre-decrement address. | |
2123 | */ | |
2124 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) \ | |
c6243b4c | 2125 | if (xstormy16_mode_dependent_address_p (ADDR)) \ |
4b58290f GK |
2126 | goto LABEL |
2127 | ||
2128 | /* A C expression that is nonzero if X is a legitimate constant for an | |
2129 | immediate operand on the target machine. You can assume that X satisfies | |
2130 | `CONSTANT_P', so you need not check this. In fact, `1' is a suitable | |
2131 | definition for this macro on machines where anything `CONSTANT_P' is valid. */ | |
2132 | #define LEGITIMATE_CONSTANT_P(X) 1 | |
2133 | ||
2134 | \f | |
2135 | /* Condition Code Status */ | |
2136 | ||
2137 | /* C code for a data type which is used for declaring the `mdep' component of | |
2138 | `cc_status'. It defaults to `int'. | |
2139 | ||
2140 | This macro is not used on machines that do not use `cc0'. */ | |
2141 | /* #define CC_STATUS_MDEP */ | |
2142 | ||
2143 | /* A C expression to initialize the `mdep' field to "empty". The default | |
2144 | definition does nothing, since most machines don't use the field anyway. If | |
2145 | you want to use the field, you should probably define this macro to | |
2146 | initialize it. | |
2147 | ||
2148 | This macro is not used on machines that do not use `cc0'. */ | |
2149 | /* #define CC_STATUS_MDEP_INIT */ | |
2150 | ||
2151 | /* A C compound statement to set the components of `cc_status' appropriately | |
2152 | for an insn INSN whose body is EXP. It is this macro's responsibility to | |
2153 | recognize insns that set the condition code as a byproduct of other activity | |
2154 | as well as those that explicitly set `(cc0)'. | |
2155 | ||
2156 | This macro is not used on machines that do not use `cc0'. | |
2157 | ||
2158 | If there are insns that do not set the condition code but do alter other | |
2159 | machine registers, this macro must check to see whether they invalidate the | |
2160 | expressions that the condition code is recorded as reflecting. For example, | |
2161 | on the 68000, insns that store in address registers do not set the condition | |
2162 | code, which means that usually `NOTICE_UPDATE_CC' can leave `cc_status' | |
2163 | unaltered for such insns. But suppose that the previous insn set the | |
2164 | condition code based on location `a4@(102)' and the current insn stores a | |
2165 | new value in `a4'. Although the condition code is not changed by this, it | |
2166 | will no longer be true that it reflects the contents of `a4@(102)'. | |
2167 | Therefore, `NOTICE_UPDATE_CC' must alter `cc_status' in this case to say | |
2168 | that nothing is known about the condition code value. | |
2169 | ||
2170 | The definition of `NOTICE_UPDATE_CC' must be prepared to deal with the | |
2171 | results of peephole optimization: insns whose patterns are `parallel' RTXs | |
2172 | containing various `reg', `mem' or constants which are just the operands. | |
2173 | The RTL structure of these insns is not sufficient to indicate what the | |
2174 | insns actually do. What `NOTICE_UPDATE_CC' should do when it sees one is | |
2175 | just to run `CC_STATUS_INIT'. | |
2176 | ||
2177 | A possible definition of `NOTICE_UPDATE_CC' is to call a function that looks | |
2178 | at an attribute named, for example, `cc'. This avoids having detailed | |
2179 | information about patterns in two places, the `md' file and in | |
2180 | `NOTICE_UPDATE_CC'. */ | |
2181 | /* #define NOTICE_UPDATE_CC(EXP, INSN) */ | |
2182 | ||
2183 | /* A list of names to be used for additional modes for condition code values in | |
2184 | registers. These names are added to `enum machine_mode' and all have class | |
2185 | `MODE_CC'. By convention, they should start with `CC' and end with `mode'. | |
2186 | ||
2187 | You should only define this macro if your machine does not use `cc0' and | |
2188 | only if additional modes are required. */ | |
2189 | /* #define EXTRA_CC_MODES */ | |
2190 | ||
2191 | /* Returns a mode from class `MODE_CC' to be used when comparison operation | |
2192 | code OP is applied to rtx X and Y. For example, on the Sparc, | |
2193 | `SELECT_CC_MODE' is defined as (see *note Jump Patterns::. for a | |
2194 | description of the reason for this definition) | |
2195 | ||
2196 | #define SELECT_CC_MODE(OP,X,Y) \ | |
2197 | (GET_MODE_CLASS (GET_MODE (X)) == MODE_FLOAT \ | |
2198 | ? ((OP == EQ || OP == NE) ? CCFPmode : CCFPEmode) \ | |
2199 | : ((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS \ | |
2200 | || GET_CODE (X) == NEG) \ | |
2201 | ? CC_NOOVmode : CCmode)) | |
2202 | ||
2203 | You need not define this macro if `EXTRA_CC_MODES' is not defined. */ | |
2204 | /* #define SELECT_CC_MODE(OP, X, Y) */ | |
2205 | ||
2206 | /* One some machines not all possible comparisons are defined, but you can | |
2207 | convert an invalid comparison into a valid one. For example, the Alpha does | |
2208 | not have a `GT' comparison, but you can use an `LT' comparison instead and | |
2209 | swap the order of the operands. | |
2210 | ||
2211 | On such machines, define this macro to be a C statement to do any required | |
2212 | conversions. CODE is the initial comparison code and OP0 and OP1 are the | |
2213 | left and right operands of the comparison, respectively. You should modify | |
2214 | CODE, OP0, and OP1 as required. | |
2215 | ||
2216 | GNU CC will not assume that the comparison resulting from this macro is | |
2217 | valid but will see if the resulting insn matches a pattern in the `md' file. | |
2218 | ||
2219 | You need not define this macro if it would never change the comparison code | |
2220 | or operands. */ | |
2221 | /* #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) */ | |
2222 | ||
2223 | /* A C expression whose value is one if it is always safe to reverse a | |
2224 | comparison whose mode is MODE. If `SELECT_CC_MODE' can ever return MODE for | |
2225 | a floating-point inequality comparison, then `REVERSIBLE_CC_MODE (MODE)' | |
2226 | must be zero. | |
2227 | ||
2228 | You need not define this macro if it would always returns zero or if the | |
2229 | floating-point format is anything other than `IEEE_FLOAT_FORMAT'. For | |
2230 | example, here is the definition used on the Sparc, where floating-point | |
2231 | inequality comparisons are always given `CCFPEmode': | |
2232 | ||
2233 | #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode) */ | |
2234 | /* #define REVERSIBLE_CC_MODE(MODE) */ | |
2235 | ||
2236 | \f | |
2237 | /* Describing Relative Costs of Operations */ | |
2238 | ||
2239 | /* A part of a C `switch' statement that describes the relative costs of | |
2240 | constant RTL expressions. It must contain `case' labels for expression | |
2241 | codes `const_int', `const', `symbol_ref', `label_ref' and `const_double'. | |
2242 | Each case must ultimately reach a `return' statement to return the relative | |
2243 | cost of the use of that kind of constant value in an expression. The cost | |
2244 | may depend on the precise value of the constant, which is available for | |
2245 | examination in X, and the rtx code of the expression in which it is | |
2246 | contained, found in OUTER_CODE. | |
2247 | ||
2248 | CODE is the expression code--redundant, since it can be obtained with | |
2249 | `GET_CODE (X)'. */ | |
3fdb2f71 GK |
2250 | #define CONST_COSTS(X, CODE, OUTER_CODE) \ |
2251 | case CONST_INT: \ | |
2252 | if (INTVAL (X) < 16 && INTVAL (X) >= 0) \ | |
2253 | return COSTS_N_INSNS (1)/2; \ | |
2254 | if (INTVAL (X) < 256 && INTVAL (X) >= 0) \ | |
2255 | return COSTS_N_INSNS (1); \ | |
2256 | case CONST_DOUBLE: \ | |
2257 | case CONST: \ | |
2258 | case SYMBOL_REF: \ | |
2259 | case LABEL_REF: \ | |
2260 | return COSTS_N_INSNS(2); | |
4b58290f GK |
2261 | |
2262 | /* Like `CONST_COSTS' but applies to nonconstant RTL expressions. This can be | |
2263 | used, for example, to indicate how costly a multiply instruction is. In | |
2264 | writing this macro, you can use the construct `COSTS_N_INSNS (N)' to specify | |
2265 | a cost equal to N fast instructions. OUTER_CODE is the code of the | |
2266 | expression in which X is contained. | |
2267 | ||
2268 | This macro is optional; do not define it if the default cost assumptions are | |
2269 | adequate for the target machine. */ | |
3fdb2f71 GK |
2270 | #define RTX_COSTS(X, CODE, OUTER_CODE) \ |
2271 | case MULT: \ | |
2272 | return COSTS_N_INSNS (35 + 6); \ | |
2273 | case DIV: \ | |
2274 | return COSTS_N_INSNS (51 - 6); | |
4b58290f GK |
2275 | |
2276 | /* An expression giving the cost of an addressing mode that contains ADDRESS. | |
2277 | If not defined, the cost is computed from the ADDRESS expression and the | |
2278 | `CONST_COSTS' values. | |
2279 | ||
2280 | For most CISC machines, the default cost is a good approximation of the true | |
2281 | cost of the addressing mode. However, on RISC machines, all instructions | |
2282 | normally have the same length and execution time. Hence all addresses will | |
2283 | have equal costs. | |
2284 | ||
2285 | In cases where more than one form of an address is known, the form with the | |
2286 | lowest cost will be used. If multiple forms have the same, lowest, cost, | |
2287 | the one that is the most complex will be used. | |
2288 | ||
2289 | For example, suppose an address that is equal to the sum of a register and a | |
2290 | constant is used twice in the same basic block. When this macro is not | |
2291 | defined, the address will be computed in a register and memory references | |
2292 | will be indirect through that register. On machines where the cost of the | |
2293 | addressing mode containing the sum is no higher than that of a simple | |
2294 | indirect reference, this will produce an additional instruction and possibly | |
2295 | require an additional register. Proper specification of this macro | |
2296 | eliminates this overhead for such machines. | |
2297 | ||
2298 | Similar use of this macro is made in strength reduction of loops. | |
2299 | ||
2300 | ADDRESS need not be valid as an address. In such a case, the cost is not | |
2301 | relevant and can be any value; invalid addresses need not be assigned a | |
2302 | different cost. | |
2303 | ||
2304 | On machines where an address involving more than one register is as cheap as | |
2305 | an address computation involving only one register, defining `ADDRESS_COST' | |
2306 | to reflect this can cause two registers to be live over a region of code | |
2307 | where only one would have been if `ADDRESS_COST' were not defined in that | |
2308 | manner. This effect should be considered in the definition of this macro. | |
2309 | Equivalent costs should probably only be given to addresses with different | |
2310 | numbers of registers on machines with lots of registers. | |
2311 | ||
3fdb2f71 GK |
2312 | This macro will normally either not be defined or be defined as a |
2313 | constant. */ | |
2314 | #define ADDRESS_COST(ADDRESS) \ | |
2315 | (GET_CODE (ADDRESS) == CONST_INT ? 2 \ | |
2316 | : GET_CODE (ADDRESS) == PLUS ? 7 \ | |
2317 | : 5) | |
4b58290f GK |
2318 | |
2319 | /* A C expression for the cost of moving data of mode MODE from a | |
2320 | register in class FROM to one in class TO. The classes are | |
2321 | expressed using the enumeration values such as `GENERAL_REGS'. A | |
2322 | value of 4 is the default; other values are interpreted relative to | |
2323 | that. | |
2324 | ||
2325 | It is not required that the cost always equal 2 when FROM is the same as TO; | |
2326 | on some machines it is expensive to move between registers if they are not | |
2327 | general registers. | |
2328 | ||
2329 | If reload sees an insn consisting of a single `set' between two hard | |
2330 | registers, and if `REGISTER_MOVE_COST' applied to their classes returns a | |
2331 | value of 2, reload does not check to ensure that the constraints of the insn | |
2332 | are met. Setting a cost of other than 2 will allow reload to verify that | |
2333 | the constraints are met. You should do this if the `movM' pattern's | |
2334 | constraints do not allow such copying. */ | |
2335 | #define REGISTER_MOVE_COST(MODE, FROM, TO) 2 | |
2336 | ||
2337 | /* A C expression for the cost of moving data of mode M between a register and | |
2338 | memory. A value of 2 is the default; this cost is relative to those in | |
2339 | `REGISTER_MOVE_COST'. | |
2340 | ||
2341 | If moving between registers and memory is more expensive than between two | |
2342 | registers, you should define this macro to express the relative cost. */ | |
3fdb2f71 | 2343 | #define MEMORY_MOVE_COST(M,C,I) (5 + memory_move_secondary_cost (M, C, I)) |
4b58290f GK |
2344 | |
2345 | /* A C expression for the cost of a branch instruction. A value of 1 is the | |
2346 | default; other values are interpreted relative to that. */ | |
2347 | ||
2348 | #define BRANCH_COST 5 | |
2349 | ||
2350 | /* Here are additional macros which do not specify precise relative costs, but | |
2351 | only that certain actions are more expensive than GNU CC would ordinarily | |
2352 | expect. */ | |
2353 | ||
2354 | /* Define this macro as a C expression which is nonzero if accessing less than | |
2355 | a word of memory (i.e. a `char' or a `short') is no faster than accessing a | |
2356 | word of memory, i.e., if such access require more than one instruction or if | |
2357 | there is no difference in cost between byte and (aligned) word loads. | |
2358 | ||
2359 | When this macro is not defined, the compiler will access a field by finding | |
2360 | the smallest containing object; when it is defined, a fullword load will be | |
2361 | used if alignment permits. Unless bytes accesses are faster than word | |
2362 | accesses, using word accesses is preferable since it may eliminate | |
2363 | subsequent memory access if subsequent accesses occur to other fields in the | |
2364 | same word of the structure, but to different bytes. */ | |
2365 | #define SLOW_BYTE_ACCESS 0 | |
2366 | ||
4b58290f GK |
2367 | /* Define this macro to be the value 1 if unaligned accesses have a cost many |
2368 | times greater than aligned accesses, for example if they are emulated in a | |
2369 | trap handler. | |
2370 | ||
2371 | When this macro is non-zero, the compiler will act as if `STRICT_ALIGNMENT' | |
2372 | were non-zero when generating code for block moves. This can cause | |
2373 | significantly more instructions to be produced. Therefore, do not set this | |
2374 | macro non-zero if unaligned accesses only add a cycle or two to the time for | |
2375 | a memory access. | |
2376 | ||
2377 | If the value of this macro is always zero, it need not be defined. */ | |
2378 | /* #define SLOW_UNALIGNED_ACCESS */ | |
2379 | ||
2380 | /* Define this macro to inhibit strength reduction of memory addresses. (On | |
2381 | some machines, such strength reduction seems to do harm rather than good.) */ | |
2382 | /* #define DONT_REDUCE_ADDR */ | |
2383 | ||
2384 | /* The number of scalar move insns which should be generated instead of a | |
2385 | string move insn or a library call. Increasing the value will always make | |
2386 | code faster, but eventually incurs high cost in increased code size. | |
2387 | ||
2388 | If you don't define this, a reasonable default is used. */ | |
2389 | /* #define MOVE_RATIO */ | |
2390 | ||
2391 | /* Define this macro if it is as good or better to call a constant function | |
2392 | address than to call an address kept in a register. */ | |
2393 | #define NO_FUNCTION_CSE | |
2394 | ||
2395 | /* Define this macro if it is as good or better for a function to call itself | |
2396 | with an explicit address than to call an address kept in a register. */ | |
2397 | #define NO_RECURSIVE_FUNCTION_CSE | |
2398 | ||
2399 | /* A C statement (sans semicolon) to update the integer variable COST based on | |
2400 | the relationship between INSN that is dependent on DEP_INSN through the | |
2401 | dependence LINK. The default is to make no adjustment to COST. This can be | |
2402 | used for example to specify to the scheduler that an output- or | |
2403 | anti-dependence does not incur the same cost as a data-dependence. */ | |
2404 | /* #define ADJUST_COST(INSN, LINK, DEP_INSN, COST) */ | |
2405 | ||
2406 | /* A C statement (sans semicolon) to update the integer scheduling | |
2407 | priority `INSN_PRIORITY(INSN)'. Reduce the priority to execute | |
2408 | the INSN earlier, increase the priority to execute INSN later. | |
2409 | Do not define this macro if you do not need to adjust the | |
2410 | scheduling priorities of insns. */ | |
2411 | /* #define ADJUST_PRIORITY (INSN) */ | |
2412 | ||
2413 | \f | |
2414 | /* Dividing the output into sections. */ | |
2415 | ||
2416 | /* A C expression whose value is a string containing the assembler operation | |
2417 | that should precede instructions and read-only data. Normally `".text"' is | |
2418 | right. */ | |
2419 | #define TEXT_SECTION_ASM_OP ".text" | |
2420 | ||
2421 | /* A C expression whose value is a string containing the assembler operation to | |
2422 | identify the following data as writable initialized data. Normally | |
2423 | `".data"' is right. */ | |
2424 | #define DATA_SECTION_ASM_OP ".data" | |
2425 | ||
2426 | /* if defined, a C expression whose value is a string containing the assembler | |
2427 | operation to identify the following data as shared data. If not defined, | |
2428 | `DATA_SECTION_ASM_OP' will be used. */ | |
2429 | /* #define SHARED_SECTION_ASM_OP */ | |
2430 | ||
2431 | /* If defined, a C expression whose value is a string containing the | |
2432 | assembler operation to identify the following data as | |
2433 | uninitialized global data. If not defined, and neither | |
2434 | `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, | |
2435 | uninitialized global data will be output in the data section if | |
2436 | `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be | |
2437 | used. */ | |
752151e8 | 2438 | #define BSS_SECTION_ASM_OP "\t.section\t.bss" |
4b58290f GK |
2439 | |
2440 | /* If defined, a C expression whose value is a string containing the | |
2441 | assembler operation to identify the following data as | |
2442 | uninitialized global shared data. If not defined, and | |
2443 | `BSS_SECTION_ASM_OP' is, the latter will be used. */ | |
2444 | /* #define SHARED_BSS_SECTION_ASM_OP */ | |
2445 | ||
2446 | /* Define the pseudo-ops used to switch to the .ctors and .dtors sections. | |
2447 | There are no shared libraries on this target so these sections need | |
2448 | not be writable. | |
2449 | ||
2450 | Defined in elfos.h. */ | |
2451 | ||
2452 | #undef CTORS_SECTION_ASM_OP | |
2453 | #undef DTORS_SECTION_ASM_OP | |
2454 | #define CTORS_SECTION_ASM_OP "\t.section\t.ctors,\"a\"" | |
2455 | #define DTORS_SECTION_ASM_OP "\t.section\t.dtors,\"a\"" | |
2456 | ||
2457 | /* A list of names for sections other than the standard two, which are | |
2458 | `in_text' and `in_data'. You need not define this macro on a system with no | |
2459 | other sections (that GCC needs to use). | |
2460 | ||
2461 | Defined in svr4.h. */ | |
2462 | /* #define EXTRA_SECTIONS */ | |
2463 | ||
2464 | /* One or more functions to be defined in `varasm.c'. These functions should | |
2465 | do jobs analogous to those of `text_section' and `data_section', for your | |
2466 | additional sections. Do not define this macro if you do not define | |
2467 | `EXTRA_SECTIONS'. | |
2468 | ||
2469 | Defined in svr4.h. */ | |
2470 | /* #define EXTRA_SECTION_FUNCTIONS */ | |
2471 | ||
4b58290f GK |
2472 | /* Define this macro if jump tables (for `tablejump' insns) should be output in |
2473 | the text section, along with the assembler instructions. Otherwise, the | |
2474 | readonly data section is used. | |
2475 | ||
2476 | This macro is irrelevant if there is no separate readonly data section. */ | |
2477 | #define JUMP_TABLES_IN_TEXT_SECTION 1 | |
4b58290f GK |
2478 | \f |
2479 | /* Position Independent Code. */ | |
2480 | ||
2481 | /* The register number of the register used to address a table of static data | |
2482 | addresses in memory. In some cases this register is defined by a | |
2483 | processor's "application binary interface" (ABI). When this macro is | |
2484 | defined, RTL is generated for this register once, as with the stack pointer | |
2485 | and frame pointer registers. If this macro is not defined, it is up to the | |
2486 | machine-dependent files to allocate such a register (if necessary). */ | |
2487 | /* #define PIC_OFFSET_TABLE_REGNUM */ | |
2488 | ||
2489 | /* Define this macro if the register defined by `PIC_OFFSET_TABLE_REGNUM' is | |
2490 | clobbered by calls. Do not define this macro if `PPIC_OFFSET_TABLE_REGNUM' | |
2491 | is not defined. */ | |
2492 | /* #define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED */ | |
2493 | ||
2494 | /* By generating position-independent code, when two different programs (A and | |
2495 | B) share a common library (libC.a), the text of the library can be shared | |
2496 | whether or not the library is linked at the same address for both programs. | |
2497 | In some of these environments, position-independent code requires not only | |
2498 | the use of different addressing modes, but also special code to enable the | |
2499 | use of these addressing modes. | |
2500 | ||
2501 | The `FINALIZE_PIC' macro serves as a hook to emit these special codes once | |
2502 | the function is being compiled into assembly code, but not before. (It is | |
2503 | not done before, because in the case of compiling an inline function, it | |
2504 | would lead to multiple PIC prologues being included in functions which used | |
2505 | inline functions and were compiled to assembly language.) */ | |
2506 | /* #define FINALIZE_PIC */ | |
2507 | ||
2508 | /* A C expression that is nonzero if X is a legitimate immediate operand on the | |
2509 | target machine when generating position independent code. You can assume | |
2510 | that X satisfies `CONSTANT_P', so you need not check this. You can also | |
2511 | assume FLAG_PIC is true, so you need not check it either. You need not | |
2512 | define this macro if all constants (including `SYMBOL_REF') can be immediate | |
2513 | operands when generating position independent code. */ | |
2514 | /* #define LEGITIMATE_PIC_OPERAND_P(X) */ | |
2515 | ||
2516 | \f | |
2517 | /* The Overall Framework of an Assembler File. */ | |
2518 | ||
2519 | /* A C expression which outputs to the stdio stream STREAM some appropriate | |
2520 | text to go at the start of an assembler file. | |
2521 | ||
2522 | Normally this macro is defined to output a line containing `#NO_APP', which | |
2523 | is a comment that has no effect on most assemblers but tells the GNU | |
2524 | assembler that it can save time by not checking for certain assembler | |
2525 | constructs. | |
2526 | ||
2527 | On systems that use SDB, it is necessary to output certain commands; see | |
2528 | `attasm.h'. | |
2529 | ||
2530 | Defined in svr4.h. */ | |
2531 | /* #define ASM_FILE_START(STREAM) */ | |
2532 | ||
2533 | /* A C expression which outputs to the stdio stream STREAM some appropriate | |
2534 | text to go at the end of an assembler file. | |
2535 | ||
2536 | If this macro is not defined, the default is to output nothing special at | |
2537 | the end of the file. Most systems don't require any definition. | |
2538 | ||
2539 | On systems that use SDB, it is necessary to output certain commands; see | |
2540 | `attasm.h'. | |
2541 | ||
2542 | Defined in svr4.h. */ | |
2543 | /* #define ASM_FILE_END(STREAM) */ | |
2544 | ||
4b58290f GK |
2545 | /* A C string constant describing how to begin a comment in the target |
2546 | assembler language. The compiler assumes that the comment will end at the | |
2547 | end of the line. */ | |
7c87e9f9 | 2548 | #define ASM_COMMENT_START ";" |
4b58290f GK |
2549 | |
2550 | /* A C string constant for text to be output before each `asm' statement or | |
2551 | group of consecutive ones. Normally this is `"#APP"', which is a comment | |
2552 | that has no effect on most assemblers but tells the GNU assembler that it | |
2553 | must check the lines that follow for all valid assembler constructs. */ | |
2554 | #define ASM_APP_ON "#APP\n" | |
2555 | ||
2556 | /* A C string constant for text to be output after each `asm' statement or | |
2557 | group of consecutive ones. Normally this is `"#NO_APP"', which tells the | |
2558 | GNU assembler to resume making the time-saving assumptions that are valid | |
2559 | for ordinary compiler output. */ | |
2560 | #define ASM_APP_OFF "#NO_APP\n" | |
2561 | ||
2562 | /* A C statement to output COFF information or DWARF debugging information | |
2563 | which indicates that filename NAME is the current source file to the stdio | |
2564 | stream STREAM. | |
2565 | ||
2566 | This macro need not be defined if the standard form of output for the file | |
2567 | format in use is appropriate. */ | |
2568 | /* #define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */ | |
2569 | ||
2570 | /* A C statement to output DBX or SDB debugging information before code for | |
2571 | line number LINE of the current source file to the stdio stream STREAM. | |
2572 | ||
2573 | This macro need not be defined if the standard form of debugging information | |
2574 | for the debugger in use is appropriate. | |
2575 | ||
2576 | Defined in svr4.h. */ | |
2577 | /* #define ASM_OUTPUT_SOURCE_LINE(STREAM, LINE) */ | |
2578 | ||
2579 | /* A C statement to output something to the assembler file to handle a `#ident' | |
2580 | directive containing the text STRING. If this macro is not defined, nothing | |
2581 | is output for a `#ident' directive. | |
2582 | ||
2583 | Defined in svr4.h. */ | |
2584 | /* #define ASM_OUTPUT_IDENT(STREAM, STRING) */ | |
2585 | ||
2586 | /* A C statement to output something to the assembler file to switch to section | |
2587 | NAME for object DECL which is either a `FUNCTION_DECL', a `VAR_DECL' or | |
2588 | `NULL_TREE'. Some target formats do not support arbitrary sections. Do not | |
2589 | define this macro in such cases. | |
2590 | ||
2591 | At present this macro is only used to support section attributes. When this | |
2592 | macro is undefined, section attributes are disabled. | |
2593 | ||
2594 | Defined in svr4.h. */ | |
2595 | /* #define ASM_OUTPUT_SECTION_NAME(STREAM, DECL, NAME) */ | |
2596 | ||
2597 | /* A C statement to output any assembler statements which are required to | |
2598 | precede any Objective C object definitions or message sending. The | |
2599 | statement is executed only when compiling an Objective C program. */ | |
2600 | /* #define OBJC_PROLOGUE */ | |
2601 | ||
2602 | \f | |
2603 | /* Output of Data. */ | |
2604 | ||
4b58290f GK |
2605 | /* A C statement to output to the stdio stream STREAM an assembler instruction |
2606 | to assemble a string constant containing the LEN bytes at PTR. PTR will be | |
2607 | a C expression of type `char *' and LEN a C expression of type `int'. | |
2608 | ||
2609 | If the assembler has a `.ascii' pseudo-op as found in the Berkeley Unix | |
2610 | assembler, do not define the macro `ASM_OUTPUT_ASCII'. | |
2611 | ||
2612 | Defined in svr4.h. */ | |
2613 | /* #define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) */ | |
2614 | ||
2615 | /* You may define this macro as a C expression. You should define the | |
2616 | expression to have a non-zero value if GNU CC should output the | |
2617 | constant pool for a function before the code for the function, or | |
2618 | a zero value if GNU CC should output the constant pool after the | |
2619 | function. If you do not define this macro, the usual case, GNU CC | |
2620 | will output the constant pool before the function. */ | |
2621 | /* #define CONSTANT_POOL_BEFORE_FUNCTION */ | |
2622 | ||
2623 | /* A C statement to output assembler commands to define the start of the | |
2624 | constant pool for a function. FUNNAME is a string giving the name of the | |
2625 | function. Should the return type of the function be required, it can be | |
2626 | obtained via FUNDECL. SIZE is the size, in bytes, of the constant pool that | |
2627 | will be written immediately after this call. | |
2628 | ||
2629 | If no constant-pool prefix is required, the usual case, this macro need not | |
2630 | be defined. */ | |
2631 | /* #define ASM_OUTPUT_POOL_PROLOGUE(FILE FUNNAME FUNDECL SIZE) */ | |
2632 | ||
2633 | /* A C statement (with or without semicolon) to output a constant in the | |
2634 | constant pool, if it needs special treatment. (This macro need not do | |
2635 | anything for RTL expressions that can be output normally.) | |
2636 | ||
2637 | The argument FILE is the standard I/O stream to output the assembler code | |
2638 | on. X is the RTL expression for the constant to output, and MODE is the | |
2639 | machine mode (in case X is a `const_int'). ALIGN is the required alignment | |
2640 | for the value X; you should output an assembler directive to force this much | |
2641 | alignment. | |
2642 | ||
2643 | The argument LABELNO is a number to use in an internal label for the address | |
2644 | of this pool entry. The definition of this macro is responsible for | |
2645 | outputting the label definition at the proper place. Here is how to do | |
2646 | this: | |
2647 | ||
2648 | ASM_OUTPUT_INTERNAL_LABEL (FILE, "LC", LABELNO); | |
2649 | ||
2650 | When you output a pool entry specially, you should end with a `goto' to the | |
2651 | label JUMPTO. This will prevent the same pool entry from being output a | |
2652 | second time in the usual manner. | |
2653 | ||
2654 | You need not define this macro if it would do nothing. */ | |
2655 | /* #define ASM_OUTPUT_SPECIAL_POOL_ENTRY(FILE, X, MODE, ALIGN, LABELNO, JUMPTO) */ | |
2656 | ||
2657 | /* Define this macro as a C expression which is nonzero if the constant EXP, of | |
2658 | type `tree', should be output after the code for a function. The compiler | |
2659 | will normally output all constants before the function; you need not define | |
2660 | this macro if this is OK. */ | |
2661 | /* #define CONSTANT_AFTER_FUNCTION_P(EXP) */ | |
2662 | ||
2663 | /* A C statement to output assembler commands to at the end of the constant | |
2664 | pool for a function. FUNNAME is a string giving the name of the function. | |
2665 | Should the return type of the function be required, you can obtain it via | |
2666 | FUNDECL. SIZE is the size, in bytes, of the constant pool that GNU CC wrote | |
2667 | immediately before this call. | |
2668 | ||
2669 | If no constant-pool epilogue is required, the usual case, you need not | |
2670 | define this macro. */ | |
2671 | /* #define ASM_OUTPUT_POOL_EPILOGUE (FILE FUNNAME FUNDECL SIZE) */ | |
2672 | ||
2673 | /* Define this macro as a C expression which is nonzero if C is used as a | |
2674 | logical line separator by the assembler. | |
2675 | ||
2676 | If you do not define this macro, the default is that only the character `;' | |
2677 | is treated as a logical line separator. */ | |
2678 | #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '|') | |
2679 | ||
4b58290f GK |
2680 | \f |
2681 | /* Output of Uninitialized Variables. */ | |
2682 | ||
2683 | /* A C statement (sans semicolon) to output to the stdio stream STREAM the | |
2684 | assembler definition of a common-label named NAME whose size is SIZE bytes. | |
2685 | The variable ROUNDED is the size rounded up to whatever alignment the caller | |
2686 | wants. | |
2687 | ||
2688 | Use the expression `assemble_name (STREAM, NAME)' to output the name itself; | |
2689 | before and after that, output the additional assembler syntax for defining | |
2690 | the name, and a newline. | |
2691 | ||
2692 | This macro controls how the assembler definitions of uninitialized global | |
2693 | variables are output. */ | |
2694 | /* #define ASM_OUTPUT_COMMON(STREAM, NAME, SIZE, ROUNDED) */ | |
2695 | ||
2696 | /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a separate, | |
2697 | explicit argument. If you define this macro, it is used in place of | |
2698 | `ASM_OUTPUT_COMMON', and gives you more flexibility in handling the required | |
2699 | alignment of the variable. The alignment is specified as the number of | |
2700 | bits. | |
2701 | ||
2702 | Defined in svr4.h. */ | |
2703 | /* #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGNMENT) */ | |
2704 | ||
2705 | /* Like ASM_OUTPUT_ALIGNED_COMMON except that it takes an additional argument - | |
2706 | the DECL of the variable to be output, if there is one. This macro can be | |
2707 | called with DECL == NULL_TREE. If you define this macro, it is used in | |
2708 | place of both ASM_OUTPUT_COMMON and ASM_OUTPUT_ALIGNED_COMMON, and gives you | |
2709 | more flexibility in handling the destination of the variable. */ | |
2710 | /* #define ASM_OUTPUT_DECL_COMMON (STREAM, DECL, NAME, SIZE, ALIGNMENT) */ | |
2711 | ||
2712 | /* If defined, it is similar to `ASM_OUTPUT_COMMON', except that it is used | |
2713 | when NAME is shared. If not defined, `ASM_OUTPUT_COMMON' will be used. */ | |
2714 | /* #define ASM_OUTPUT_SHARED_COMMON(STREAM, NAME, SIZE, ROUNDED) */ | |
2715 | ||
2716 | /* A C statement (sans semicolon) to output to the stdio stream STREAM the | |
2717 | assembler definition of uninitialized global DECL named NAME whose size is | |
2718 | SIZE bytes. The variable ROUNDED is the size rounded up to whatever | |
2719 | alignment the caller wants. | |
2720 | ||
2721 | Try to use function `asm_output_bss' defined in `varasm.c' when defining | |
2722 | this macro. If unable, use the expression `assemble_name (STREAM, NAME)' to | |
2723 | output the name itself; before and after that, output the additional | |
2724 | assembler syntax for defining the name, and a newline. | |
2725 | ||
2726 | This macro controls how the assembler definitions of uninitialized global | |
2727 | variables are output. This macro exists to properly support languages like | |
2728 | `c++' which do not have `common' data. However, this macro currently is not | |
2729 | defined for all targets. If this macro and `ASM_OUTPUT_ALIGNED_BSS' are not | |
2730 | defined then `ASM_OUTPUT_COMMON' or `ASM_OUTPUT_ALIGNED_COMMON' or | |
2731 | `ASM_OUTPUT_DECL_COMMON' is used. */ | |
2732 | /* #define ASM_OUTPUT_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */ | |
2733 | ||
2734 | /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a separate, | |
2735 | explicit argument. If you define this macro, it is used in place of | |
2736 | `ASM_OUTPUT_BSS', and gives you more flexibility in handling the required | |
2737 | alignment of the variable. The alignment is specified as the number of | |
2738 | bits. | |
2739 | ||
2740 | Try to use function `asm_output_aligned_bss' defined in file `varasm.c' when | |
2741 | defining this macro. */ | |
2742 | /* #define ASM_OUTPUT_ALIGNED_BSS(STREAM, DECL, NAME, SIZE, ALIGNMENT) */ | |
2743 | ||
2744 | /* If defined, it is similar to `ASM_OUTPUT_BSS', except that it is used when | |
2745 | NAME is shared. If not defined, `ASM_OUTPUT_BSS' will be used. */ | |
2746 | /* #define ASM_OUTPUT_SHARED_BSS(STREAM, DECL, NAME, SIZE, ROUNDED) */ | |
2747 | ||
2748 | /* A C statement (sans semicolon) to output to the stdio stream STREAM the | |
2749 | assembler definition of a local-common-label named NAME whose size is SIZE | |
2750 | bytes. The variable ROUNDED is the size rounded up to whatever alignment | |
2751 | the caller wants. | |
2752 | ||
2753 | Use the expression `assemble_name (STREAM, NAME)' to output the name itself; | |
2754 | before and after that, output the additional assembler syntax for defining | |
2755 | the name, and a newline. | |
2756 | ||
2757 | This macro controls how the assembler definitions of uninitialized static | |
2758 | variables are output. */ | |
2759 | /* #define ASM_OUTPUT_LOCAL(STREAM, NAME, SIZE, ROUNDED) */ | |
2760 | ||
2761 | /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a separate, | |
2762 | explicit argument. If you define this macro, it is used in place of | |
2763 | `ASM_OUTPUT_LOCAL', and gives you more flexibility in handling the required | |
2764 | alignment of the variable. The alignment is specified as the number of | |
2765 | bits. | |
2766 | ||
2767 | Defined in svr4.h. */ | |
2768 | /* #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGNMENT) */ | |
2769 | ||
2770 | /* Like `ASM_OUTPUT_ALIGNED_LOCAL' except that it takes an additional | |
2771 | parameter - the DECL of variable to be output, if there is one. | |
2772 | This macro can be called with DECL == NULL_TREE. If you define | |
2773 | this macro, it is used in place of `ASM_OUTPUT_LOCAL' and | |
2774 | `ASM_OUTPUT_ALIGNED_LOCAL', and gives you more flexibility in | |
2775 | handling the destination of the variable. */ | |
2776 | /* #define ASM_OUTPUT_DECL_LOCAL(STREAM, DECL, NAME, SIZE, ALIGNMENT) */ | |
2777 | ||
2778 | /* If defined, it is similar to `ASM_OUTPUT_LOCAL', except that it is used when | |
2779 | NAME is shared. If not defined, `ASM_OUTPUT_LOCAL' will be used. */ | |
2780 | /* #define ASM_OUTPUT_SHARED_LOCAL (STREAM, NAME, SIZE, ROUNDED) */ | |
2781 | ||
2782 | \f | |
2783 | /* Output and Generation of Labels. */ | |
2784 | ||
4b58290f GK |
2785 | /* A C statement to output to the stdio stream STREAM the assembler |
2786 | definition of a symbol named SYMBOL. */ | |
2787 | #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \ | |
2788 | do { \ | |
2789 | if (SYMBOL_REF_FLAG (SYMBOL)) \ | |
c27c15db | 2790 | ASM_OUTPUT_LABEL_REF ((STREAM), XSTR (SYMBOL, 0)); \ |
4b58290f GK |
2791 | else \ |
2792 | assemble_name (STREAM, XSTR (SYMBOL, 0)); \ | |
2793 | } while (0) | |
2794 | ||
2f0b7af6 GK |
2795 | /* A C statement to output to the stdio stream STREAM the assembler |
2796 | definition of a label, the textual form is in 'BUF'. Not used | |
2797 | for %l. */ | |
2798 | #define ASM_OUTPUT_LABEL_REF(STREAM, NAME) \ | |
2799 | do { \ | |
2800 | fputs ("@fptr(", STREAM); \ | |
2801 | assemble_name (STREAM, NAME); \ | |
2802 | fputc (')', STREAM); \ | |
2803 | } while (0) | |
2804 | ||
4b58290f GK |
2805 | /* A C statement (sans semicolon) to output to the stdio stream STREAM any text |
2806 | necessary for declaring the name NAME of a function which is being defined. | |
2807 | This macro is responsible for outputting the label definition (perhaps using | |
2808 | `ASM_OUTPUT_LABEL'). The argument DECL is the `FUNCTION_DECL' tree node | |
2809 | representing the function. | |
2810 | ||
2811 | If this macro is not defined, then the function name is defined in the usual | |
2812 | manner as a label (by means of `ASM_OUTPUT_LABEL'). | |
2813 | ||
2814 | Defined in svr4.h. */ | |
2815 | /* #define ASM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) */ | |
2816 | ||
2817 | /* A C statement (sans semicolon) to output to the stdio stream STREAM any text | |
2818 | necessary for declaring the size of a function which is being defined. The | |
2819 | argument NAME is the name of the function. The argument DECL is the | |
2820 | `FUNCTION_DECL' tree node representing the function. | |
2821 | ||
2822 | If this macro is not defined, then the function size is not defined. | |
2823 | ||
2824 | Defined in svr4.h. */ | |
2825 | /* #define ASM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) */ | |
2826 | ||
2827 | /* A C statement (sans semicolon) to output to the stdio stream STREAM any text | |
2828 | necessary for declaring the name NAME of an initialized variable which is | |
2829 | being defined. This macro must output the label definition (perhaps using | |
2830 | `ASM_OUTPUT_LABEL'). The argument DECL is the `VAR_DECL' tree node | |
2831 | representing the variable. | |
2832 | ||
2833 | If this macro is not defined, then the variable name is defined in the usual | |
2834 | manner as a label (by means of `ASM_OUTPUT_LABEL'). | |
2835 | ||
2836 | Defined in svr4.h. */ | |
2837 | /* #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) */ | |
2838 | ||
2839 | /* A C statement (sans semicolon) to finish up declaring a variable name once | |
2840 | the compiler has processed its initializer fully and thus has had a chance | |
2841 | to determine the size of an array when controlled by an initializer. This | |
2842 | is used on systems where it's necessary to declare something about the size | |
2843 | of the object. | |
2844 | ||
2845 | If you don't define this macro, that is equivalent to defining it to do | |
2846 | nothing. | |
2847 | ||
2848 | Defined in svr4.h. */ | |
2849 | /* #define ASM_FINISH_DECLARE_OBJECT(STREAM, DECL, TOPLEVEL, ATEND) */ | |
2850 | ||
506a61b1 KG |
2851 | /* Globalizing directive for a label. */ |
2852 | #define GLOBAL_ASM_OP "\t.globl " | |
4b58290f GK |
2853 | |
2854 | /* A C statement (sans semicolon) to output to the stdio stream STREAM some | |
2855 | commands that will make the label NAME weak; that is, available for | |
2856 | reference from other files but only used if no other definition is | |
2857 | available. Use the expression `assemble_name (STREAM, NAME)' to output the | |
2858 | name itself; before and after that, output the additional assembler syntax | |
2859 | for making that name weak, and a newline. | |
2860 | ||
2861 | If you don't define this macro, GNU CC will not support weak symbols and you | |
2862 | should not define the `SUPPORTS_WEAK' macro. | |
2863 | ||
2864 | Defined in svr4.h. */ | |
2865 | /* #define ASM_WEAKEN_LABEL */ | |
2866 | ||
2867 | /* A C expression which evaluates to true if the target supports weak symbols. | |
2868 | ||
2869 | If you don't define this macro, `defaults.h' provides a default definition. | |
2870 | If `ASM_WEAKEN_LABEL' is defined, the default definition is `1'; otherwise, | |
2871 | it is `0'. Define this macro if you want to control weak symbol support | |
2872 | with a compiler flag such as `-melf'. */ | |
2873 | /* #define SUPPORTS_WEAK */ | |
2874 | ||
2875 | /* A C statement (sans semicolon) to mark DECL to be emitted as a | |
2876 | public symbol such that extra copies in multiple translation units | |
2877 | will be discarded by the linker. Define this macro if your object | |
2878 | file format provides support for this concept, such as the `COMDAT' | |
2879 | section flags in the Microsoft Windows PE/COFF format, and this | |
2880 | support requires changes to DECL, such as putting it in a separate | |
2881 | section. | |
2882 | ||
2883 | Defined in svr4.h. */ | |
2884 | /* #define MAKE_DECL_ONE_ONLY */ | |
2885 | ||
2886 | /* A C expression which evaluates to true if the target supports one-only | |
2887 | semantics. | |
2888 | ||
2889 | If you don't define this macro, `varasm.c' provides a default definition. | |
2890 | If `MAKE_DECL_ONE_ONLY' is defined, the default definition is `1'; | |
2891 | otherwise, it is `0'. Define this macro if you want to control one-only | |
2892 | symbol support with a compiler flag, or if setting the `DECL_ONE_ONLY' flag | |
2893 | is enough to mark a declaration to be emitted as one-only. */ | |
2894 | /* #define SUPPORTS_ONE_ONLY */ | |
2895 | ||
2896 | /* A C statement (sans semicolon) to output to the stdio stream STREAM any text | |
2897 | necessary for declaring the name of an external symbol named NAME which is | |
2898 | referenced in this compilation but not defined. The value of DECL is the | |
2899 | tree node for the declaration. | |
2900 | ||
2901 | This macro need not be defined if it does not need to output anything. The | |
2902 | GNU assembler and most Unix assemblers don't require anything. */ | |
2903 | /* #define ASM_OUTPUT_EXTERNAL(STREAM, DECL, NAME) */ | |
2904 | ||
2905 | /* A C statement (sans semicolon) to output on STREAM an assembler pseudo-op to | |
2906 | declare a library function name external. The name of the library function | |
2907 | is given by SYMREF, which has type `rtx' and is a `symbol_ref'. | |
2908 | ||
2909 | This macro need not be defined if it does not need to output anything. The | |
2910 | GNU assembler and most Unix assemblers don't require anything. | |
2911 | ||
2912 | Defined in svr4.h. */ | |
2913 | /* #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM, SYMREF) */ | |
2914 | ||
2915 | /* A C statement (sans semicolon) to output to the stdio stream STREAM a | |
2916 | reference in assembler syntax to a label named NAME. This should add `_' to | |
2917 | the front of the name, if that is customary on your operating system, as it | |
2918 | is in most Berkeley Unix systems. This macro is used in `assemble_name'. */ | |
2919 | /* #define ASM_OUTPUT_LABELREF(STREAM, NAME) */ | |
2920 | ||
2921 | /* A C statement to output to the stdio stream STREAM a label whose name is | |
2922 | made from the string PREFIX and the number NUM. | |
2923 | ||
2924 | It is absolutely essential that these labels be distinct from the labels | |
2925 | used for user-level functions and variables. Otherwise, certain programs | |
2926 | will have name conflicts with internal labels. | |
2927 | ||
2928 | It is desirable to exclude internal labels from the symbol table of the | |
2929 | object file. Most assemblers have a naming convention for labels that | |
2930 | should be excluded; on many systems, the letter `L' at the beginning of a | |
2931 | label has this effect. You should find out what convention your system | |
2932 | uses, and follow it. | |
2933 | ||
2934 | The usual definition of this macro is as follows: | |
2935 | ||
2936 | fprintf (STREAM, "L%s%d:\n", PREFIX, NUM) | |
2937 | ||
2938 | Defined in svr4.h. */ | |
2939 | /* #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) */ | |
2940 | ||
2941 | /* A C statement to store into the string STRING a label whose name is made | |
2942 | from the string PREFIX and the number NUM. | |
2943 | ||
2944 | This string, when output subsequently by `assemble_name', should produce the | |
2945 | output that `ASM_OUTPUT_INTERNAL_LABEL' would produce with the same PREFIX | |
2946 | and NUM. | |
2947 | ||
2948 | If the string begins with `*', then `assemble_name' will output the rest of | |
2949 | the string unchanged. It is often convenient for | |
2950 | `ASM_GENERATE_INTERNAL_LABEL' to use `*' in this way. If the string doesn't | |
2951 | start with `*', then `ASM_OUTPUT_LABELREF' gets to output the string, and | |
2952 | may change it. (Of course, `ASM_OUTPUT_LABELREF' is also part of your | |
2953 | machine description, so you should know what it does on your machine.) | |
2954 | ||
2955 | Defined in svr4.h. */ | |
2956 | /* #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) */ | |
2957 | ||
2958 | /* A C expression to assign to OUTVAR (which is a variable of type `char *') a | |
2959 | newly allocated string made from the string NAME and the number NUMBER, with | |
2960 | some suitable punctuation added. Use `alloca' to get space for the string. | |
2961 | ||
2962 | The string will be used as an argument to `ASM_OUTPUT_LABELREF' to produce | |
2963 | an assembler label for an internal static variable whose name is NAME. | |
2964 | Therefore, the string must be such as to result in valid assembler code. | |
2965 | The argument NUMBER is different each time this macro is executed; it | |
2966 | prevents conflicts between similarly-named internal static variables in | |
2967 | different scopes. | |
2968 | ||
2969 | Ideally this string should not be a valid C identifier, to prevent any | |
2970 | conflict with the user's own symbols. Most assemblers allow periods or | |
2971 | percent signs in assembler symbols; putting at least one of these between | |
2972 | the name and the number will suffice. */ | |
2973 | #define ASM_FORMAT_PRIVATE_NAME(OUTVAR, NAME, NUMBER) \ | |
2974 | do { \ | |
2975 | (OUTVAR) = (char *) alloca (strlen ((NAME)) + 12); \ | |
2976 | sprintf ((OUTVAR), "%s.%ld", (NAME), (long)(NUMBER)); \ | |
2977 | } while (0) | |
2978 | ||
2979 | /* A C statement to output to the stdio stream STREAM assembler code which | |
2980 | defines (equates) the symbol NAME to have the value VALUE. | |
2981 | ||
2982 | If SET_ASM_OP is defined, a default definition is provided which is correct | |
2983 | for most systems. | |
2984 | ||
2985 | Defined in svr4.h. */ | |
2986 | /* #define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) */ | |
2987 | ||
2988 | /* A C statement to output to the stdio stream STREAM assembler code which | |
2989 | defines (equates) the weak symbol NAME to have the value VALUE. | |
2990 | ||
2991 | Define this macro if the target only supports weak aliases; define | |
2992 | ASM_OUTPUT_DEF instead if possible. */ | |
2993 | /* #define ASM_OUTPUT_WEAK_ALIAS (STREAM, NAME, VALUE) */ | |
2994 | ||
2995 | /* Define this macro to override the default assembler names used for Objective | |
2996 | C methods. | |
2997 | ||
2998 | The default name is a unique method number followed by the name of the class | |
2999 | (e.g. `_1_Foo'). For methods in categories, the name of the category is | |
3000 | also included in the assembler name (e.g. `_1_Foo_Bar'). | |
3001 | ||
3002 | These names are safe on most systems, but make debugging difficult since the | |
3003 | method's selector is not present in the name. Therefore, particular systems | |
3004 | define other ways of computing names. | |
3005 | ||
3006 | BUF is an expression of type `char *' which gives you a buffer in which to | |
3007 | store the name; its length is as long as CLASS_NAME, CAT_NAME and SEL_NAME | |
3008 | put together, plus 50 characters extra. | |
3009 | ||
3010 | The argument IS_INST specifies whether the method is an instance method or a | |
3011 | class method; CLASS_NAME is the name of the class; CAT_NAME is the name of | |
3012 | the category (or NULL if the method is not in a category); and SEL_NAME is | |
3013 | the name of the selector. | |
3014 | ||
3015 | On systems where the assembler can handle quoted names, you can use this | |
3016 | macro to provide more human-readable names. */ | |
3017 | /* #define OBJC_GEN_METHOD_LABEL(BUF, IS_INST, CLASS_NAME, CAT_NAME, SEL_NAME) */ | |
3018 | ||
3019 | \f | |
3020 | /* Macros Controlling Initialization Routines. */ | |
3021 | ||
3022 | /* If defined, a C string constant for the assembler operation to identify the | |
3023 | following data as initialization code. If not defined, GNU CC will assume | |
3024 | such a section does not exist. When you are using special sections for | |
3025 | initialization and termination functions, this macro also controls how | |
3026 | `crtstuff.c' and `libgcc2.c' arrange to run the initialization functions. | |
3027 | ||
3028 | Defined in svr4.h. */ | |
3029 | /* #define INIT_SECTION_ASM_OP */ | |
3030 | ||
3031 | /* If defined, `main' will not call `__main' as described above. This macro | |
3032 | should be defined for systems that control the contents of the init section | |
3033 | on a symbol-by-symbol basis, such as OSF/1, and should not be defined | |
3034 | explicitly for systems that support `INIT_SECTION_ASM_OP'. */ | |
3035 | /* #define HAS_INIT_SECTION */ | |
3036 | ||
3037 | /* If defined, a C string constant for a switch that tells the linker that the | |
3038 | following symbol is an initialization routine. */ | |
3039 | /* #define LD_INIT_SWITCH */ | |
3040 | ||
3041 | /* If defined, a C string constant for a switch that tells the linker that the | |
3042 | following symbol is a finalization routine. */ | |
3043 | /* #define LD_FINI_SWITCH */ | |
3044 | ||
3045 | /* If defined, `main' will call `__main' despite the presence of | |
3046 | `INIT_SECTION_ASM_OP'. This macro should be defined for systems where the | |
3047 | init section is not actually run automatically, but is still useful for | |
3048 | collecting the lists of constructors and destructors. */ | |
3049 | /* #define INVOKE__main */ | |
3050 | ||
3051 | /* Define this macro as a C statement to output on the stream STREAM the | |
3052 | assembler code to arrange to call the function named NAME at initialization | |
3053 | time. | |
3054 | ||
3055 | Assume that NAME is the name of a C function generated automatically by the | |
3056 | compiler. This function takes no arguments. Use the function | |
3057 | `assemble_name' to output the name NAME; this performs any system-specific | |
3058 | syntactic transformations such as adding an underscore. | |
3059 | ||
3060 | If you don't define this macro, nothing special is output to arrange to call | |
3061 | the function. This is correct when the function will be called in some | |
3062 | other manner--for example, by means of the `collect2' program, which looks | |
3063 | through the symbol table to find these functions by their names. | |
3064 | ||
3065 | Defined in svr4.h. */ | |
3066 | /* #define ASM_OUTPUT_CONSTRUCTOR(STREAM, NAME) */ | |
3067 | ||
3068 | /* This is like `ASM_OUTPUT_CONSTRUCTOR' but used for termination functions | |
3069 | rather than initialization functions. | |
3070 | ||
3071 | Defined in svr4.h. */ | |
3072 | /* #define ASM_OUTPUT_DESTRUCTOR(STREAM, NAME) */ | |
3073 | ||
3074 | /* If your system uses `collect2' as the means of processing constructors, then | |
3075 | that program normally uses `nm' to scan an object file for constructor | |
3076 | functions to be called. On certain kinds of systems, you can define these | |
3077 | macros to make `collect2' work faster (and, in some cases, make it work at | |
3078 | all): */ | |
3079 | ||
3080 | /* Define this macro if the system uses COFF (Common Object File Format) object | |
3081 | files, so that `collect2' can assume this format and scan object files | |
3082 | directly for dynamic constructor/destructor functions. */ | |
3083 | /* #define OBJECT_FORMAT_COFF */ | |
3084 | ||
3085 | /* Define this macro if the system uses ROSE format object files, so that | |
3086 | `collect2' can assume this format and scan object files directly for dynamic | |
3087 | constructor/destructor functions. | |
3088 | ||
3089 | These macros are effective only in a native compiler; `collect2' as | |
3090 | part of a cross compiler always uses `nm' for the target machine. */ | |
3091 | /* #define OBJECT_FORMAT_ROSE */ | |
3092 | ||
3093 | /* Define this macro if the system uses ELF format object files. | |
3094 | ||
3095 | Defined in svr4.h. */ | |
3096 | /* #define OBJECT_FORMAT_ELF */ | |
3097 | ||
3098 | /* Define this macro as a C string constant containing the file name to use to | |
3099 | execute `nm'. The default is to search the path normally for `nm'. | |
3100 | ||
3101 | If your system supports shared libraries and has a program to list the | |
3102 | dynamic dependencies of a given library or executable, you can define these | |
3103 | macros to enable support for running initialization and termination | |
3104 | functions in shared libraries: */ | |
3105 | /* #define REAL_NM_FILE_NAME */ | |
3106 | ||
3107 | /* Define this macro to a C string constant containing the name of the program | |
3108 | which lists dynamic dependencies, like `"ldd"' under SunOS 4. */ | |
3109 | /* #define LDD_SUFFIX */ | |
3110 | ||
3111 | /* Define this macro to be C code that extracts filenames from the output of | |
3112 | the program denoted by `LDD_SUFFIX'. PTR is a variable of type `char *' | |
3113 | that points to the beginning of a line of output from `LDD_SUFFIX'. If the | |
3114 | line lists a dynamic dependency, the code must advance PTR to the beginning | |
3115 | of the filename on that line. Otherwise, it must set PTR to `NULL'. */ | |
3116 | /* #define PARSE_LDD_OUTPUT (PTR) */ | |
3117 | ||
3118 | \f | |
3119 | /* Output of Assembler Instructions. */ | |
3120 | ||
3121 | /* A C initializer containing the assembler's names for the machine registers, | |
3122 | each one as a C string constant. This is what translates register numbers | |
3123 | in the compiler into assembler language. */ | |
3124 | #define REGISTER_NAMES \ | |
3125 | { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", \ | |
3126 | "r11", "r12", "r13", "psw", "sp", "carry", "fp", "ap" } | |
3127 | ||
3128 | /* If defined, a C initializer for an array of structures containing a name and | |
3129 | a register number. This macro defines additional names for hard registers, | |
3130 | thus allowing the `asm' option in declarations to refer to registers using | |
3131 | alternate names. */ | |
3132 | #define ADDITIONAL_REGISTER_NAMES \ | |
3133 | { { "r14", 14 }, \ | |
3134 | { "r15", 15 } } | |
3135 | ||
3136 | /* Define this macro if you are using an unusual assembler that requires | |
3137 | different names for the machine instructions. | |
3138 | ||
3139 | The definition is a C statement or statements which output an assembler | |
3140 | instruction opcode to the stdio stream STREAM. The macro-operand PTR is a | |
3141 | variable of type `char *' which points to the opcode name in its "internal" | |
3142 | form--the form that is written in the machine description. The definition | |
3143 | should output the opcode name to STREAM, performing any translation you | |
3144 | desire, and increment the variable PTR to point at the end of the opcode so | |
3145 | that it will not be output twice. | |
3146 | ||
3147 | In fact, your macro definition may process less than the entire opcode name, | |
3148 | or more than the opcode name; but if you want to process text that includes | |
3149 | `%'-sequences to substitute operands, you must take care of the substitution | |
3150 | yourself. Just be sure to increment PTR over whatever text should not be | |
3151 | output normally. | |
3152 | ||
3153 | If you need to look at the operand values, they can be found as the elements | |
3154 | of `recog_data.operand'. | |
3155 | ||
3156 | If the macro definition does nothing, the instruction is output in the usual | |
3157 | way. */ | |
3158 | /* #define ASM_OUTPUT_OPCODE(STREAM, PTR) */ | |
3159 | ||
3160 | /* If defined, a C statement to be executed just prior to the output of | |
3161 | assembler code for INSN, to modify the extracted operands so they will be | |
3162 | output differently. | |
3163 | ||
3164 | Here the argument OPVEC is the vector containing the operands extracted from | |
3165 | INSN, and NOPERANDS is the number of elements of the vector which contain | |
3166 | meaningful data for this insn. The contents of this vector are what will be | |
3167 | used to convert the insn template into assembler code, so you can change the | |
3168 | assembler output by changing the contents of the vector. | |
3169 | ||
3170 | This macro is useful when various assembler syntaxes share a single file of | |
3171 | instruction patterns; by defining this macro differently, you can cause a | |
3172 | large class of instructions to be output differently (such as with | |
3173 | rearranged operands). Naturally, variations in assembler syntax affecting | |
3174 | individual insn patterns ought to be handled by writing conditional output | |
3175 | routines in those patterns. | |
3176 | ||
3177 | If this macro is not defined, it is equivalent to a null statement. */ | |
3178 | /* #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) */ | |
3179 | ||
3180 | /* If defined, `FINAL_PRESCAN_INSN' will be called on each | |
3181 | `CODE_LABEL'. In that case, OPVEC will be a null pointer and | |
3182 | NOPERANDS will be zero. */ | |
3183 | /* #define FINAL_PRESCAN_LABEL */ | |
3184 | ||
3185 | /* A C compound statement to output to stdio stream STREAM the assembler syntax | |
3186 | for an instruction operand X. X is an RTL expression. | |
3187 | ||
3188 | CODE is a value that can be used to specify one of several ways of printing | |
3189 | the operand. It is used when identical operands must be printed differently | |
3190 | depending on the context. CODE comes from the `%' specification that was | |
3191 | used to request printing of the operand. If the specification was just | |
3192 | `%DIGIT' then CODE is 0; if the specification was `%LTR DIGIT' then CODE is | |
3193 | the ASCII code for LTR. | |
3194 | ||
3195 | If X is a register, this macro should print the register's name. The names | |
3196 | can be found in an array `reg_names' whose type is `char *[]'. `reg_names' | |
3197 | is initialized from `REGISTER_NAMES'. | |
3198 | ||
3199 | When the machine description has a specification `%PUNCT' (a `%' followed by | |
3200 | a punctuation character), this macro is called with a null pointer for X and | |
3201 | the punctuation character for CODE. */ | |
c6243b4c | 3202 | #define PRINT_OPERAND(STREAM, X, CODE) xstormy16_print_operand (STREAM, X, CODE) |
4b58290f GK |
3203 | |
3204 | /* A C expression which evaluates to true if CODE is a valid punctuation | |
3205 | character for use in the `PRINT_OPERAND' macro. If | |
3206 | `PRINT_OPERAND_PUNCT_VALID_P' is not defined, it means that no punctuation | |
3207 | characters (except for the standard one, `%') are used in this way. */ | |
3208 | /* #define PRINT_OPERAND_PUNCT_VALID_P(CODE) */ | |
3209 | ||
3210 | /* A C compound statement to output to stdio stream STREAM the assembler syntax | |
3211 | for an instruction operand that is a memory reference whose address is X. X | |
fb49053f | 3212 | is an RTL expression. */ |
c6243b4c | 3213 | #define PRINT_OPERAND_ADDRESS(STREAM, X) xstormy16_print_operand_address (STREAM, X) |
4b58290f GK |
3214 | |
3215 | /* A C statement, to be executed after all slot-filler instructions have been | |
3216 | output. If necessary, call `dbr_sequence_length' to determine the number of | |
3217 | slots filled in a sequence (zero if not currently outputting a sequence), to | |
3218 | decide how many no-ops to output, or whatever. | |
3219 | ||
3220 | Don't define this macro if it has nothing to do, but it is helpful in | |
3221 | reading assembly output if the extent of the delay sequence is made explicit | |
3222 | (e.g. with white space). | |
3223 | ||
3224 | Note that output routines for instructions with delay slots must be prepared | |
3225 | to deal with not being output as part of a sequence (i.e. when the | |
3226 | scheduling pass is not run, or when no slot fillers could be found.) The | |
3227 | variable `final_sequence' is null when not processing a sequence, otherwise | |
3228 | it contains the `sequence' rtx being output. */ | |
3229 | /* #define DBR_OUTPUT_SEQEND(FILE) */ | |
3230 | ||
3231 | /* If defined, C string expressions to be used for the `%R', `%L', `%U', and | |
3232 | `%I' options of `asm_fprintf' (see `final.c'). These are useful when a | |
3233 | single `md' file must support multiple assembler formats. In that case, the | |
3234 | various `tm.h' files can define these macros differently. | |
3235 | ||
3236 | USER_LABEL_PREFIX is defined in svr4.h. */ | |
3237 | #define REGISTER_PREFIX "" | |
3238 | #define LOCAL_LABEL_PREFIX "." | |
3239 | #define USER_LABEL_PREFIX "" | |
3240 | #define IMMEDIATE_PREFIX "#" | |
3241 | ||
3242 | /* If your target supports multiple dialects of assembler language (such as | |
3243 | different opcodes), define this macro as a C expression that gives the | |
3244 | numeric index of the assembler language dialect to use, with zero as the | |
3245 | first variant. | |
3246 | ||
3247 | If this macro is defined, you may use `{option0|option1|option2...}' | |
3248 | constructs in the output templates of patterns or in the first argument of | |
3249 | `asm_fprintf'. This construct outputs `option0', `option1' or `option2', | |
3250 | etc., if the value of `ASSEMBLER_DIALECT' is zero, one or two, etc. Any | |
3251 | special characters within these strings retain their usual meaning. | |
3252 | ||
3253 | If you do not define this macro, the characters `{', `|' and `}' do not have | |
3254 | any special meaning when used in templates or operands to `asm_fprintf'. | |
3255 | ||
3256 | Define the macros `REGISTER_PREFIX', `LOCAL_LABEL_PREFIX', | |
3257 | `USER_LABEL_PREFIX' and `IMMEDIATE_PREFIX' if you can express the variations | |
3258 | in assemble language syntax with that mechanism. Define `ASSEMBLER_DIALECT' | |
3259 | and use the `{option0|option1}' syntax if the syntax variant are larger and | |
3260 | involve such things as different opcodes or operand order. */ | |
3261 | /* #define ASSEMBLER_DIALECT */ | |
3262 | ||
3263 | /* A C expression to output to STREAM some assembler code which will push hard | |
3264 | register number REGNO onto the stack. The code need not be optimal, since | |
3265 | this macro is used only when profiling. */ | |
3266 | #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \ | |
3267 | fprintf (STREAM, "\tpush %d\n", REGNO) | |
3268 | ||
3269 | /* A C expression to output to STREAM some assembler code which will pop hard | |
3270 | register number REGNO off of the stack. The code need not be optimal, since | |
3271 | this macro is used only when profiling. */ | |
3272 | #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \ | |
3273 | fprintf (STREAM, "\tpop %d\n", REGNO) | |
3274 | ||
3275 | \f | |
3276 | /* Output of dispatch tables. */ | |
3277 | ||
3278 | /* This port does not use the ASM_OUTPUT_ADDR_VEC_ELT macro, because | |
3279 | this could cause label alignment to appear between the 'br' and the table, | |
3280 | which would be bad. Instead, it controls the output of the table | |
3281 | itself. */ | |
3282 | #define ASM_OUTPUT_ADDR_VEC(LABEL, BODY) \ | |
c6243b4c | 3283 | xstormy16_output_addr_vec (file, LABEL, BODY) |
4b58290f GK |
3284 | |
3285 | /* Alignment for ADDR_VECs is the same as for code. */ | |
3286 | #define ADDR_VEC_ALIGN(ADDR_VEC) 1 | |
3287 | ||
3288 | \f | |
3289 | /* Assembler Commands for Exception Regions. */ | |
3290 | ||
4b58290f GK |
3291 | /* An rtx used to mask the return address found via RETURN_ADDR_RTX, so that it |
3292 | does not contain any extraneous set bits in it. */ | |
3293 | /* #define MASK_RETURN_ADDR */ | |
3294 | ||
3295 | /* Define this macro to 0 if your target supports DWARF 2 frame unwind | |
3296 | information, but it does not yet work with exception handling. Otherwise, | |
3297 | if your target supports this information (if it defines | |
301d03af | 3298 | `INCOMING_RETURN_ADDR_RTX'), GCC will provide a default definition of 1. |
4b58290f GK |
3299 | |
3300 | If this macro is defined to 1, the DWARF 2 unwinder will be the default | |
3301 | exception handling mechanism; otherwise, setjmp/longjmp will be used by | |
3302 | default. | |
3303 | ||
3304 | If this macro is defined to anything, the DWARF 2 unwinder will be used | |
3305 | instead of inline unwinders and __unwind_function in the non-setjmp case. */ | |
e27e731d | 3306 | #define DWARF2_UNWIND_INFO 0 |
4b58290f | 3307 | |
9defc9b7 RH |
3308 | /* Don't use __builtin_setjmp for unwinding, since it's tricky to get |
3309 | at the high 16 bits of an address. */ | |
3310 | #define DONT_USE_BUILTIN_SETJMP | |
3311 | #define JMP_BUF_SIZE 8 | |
4b58290f GK |
3312 | \f |
3313 | /* Assembler Commands for Alignment. */ | |
3314 | ||
3315 | /* The alignment (log base 2) to put in front of LABEL, which follows | |
3316 | a BARRIER. | |
3317 | ||
3318 | This macro need not be defined if you don't want any special alignment to be | |
3319 | done at such a time. Most machine descriptions do not currently define the | |
3320 | macro. */ | |
3321 | /* #define LABEL_ALIGN_AFTER_BARRIER(LABEL) */ | |
3322 | ||
3323 | /* The desired alignment for the location counter at the beginning | |
3324 | of a loop. | |
3325 | ||
3326 | This macro need not be defined if you don't want any special alignment to be | |
3327 | done at such a time. Most machine descriptions do not currently define the | |
3328 | macro. */ | |
3329 | /* #define LOOP_ALIGN(LABEL) */ | |
3330 | ||
3331 | /* A C statement to output to the stdio stream STREAM an assembler instruction | |
3332 | to advance the location counter by NBYTES bytes. Those bytes should be zero | |
3333 | when loaded. NBYTES will be a C expression of type `int'. | |
3334 | ||
3335 | Defined in elfos.h. */ | |
3336 | /* #define ASM_OUTPUT_SKIP(STREAM, NBYTES) */ | |
3337 | ||
3338 | /* Define this macro if `ASM_OUTPUT_SKIP' should not be used in the text | |
3339 | section because it fails put zeros in the bytes that are skipped. This is | |
3340 | true on many Unix systems, where the pseudo-op to skip bytes produces no-op | |
3341 | instructions rather than zeros when used in the text section. */ | |
3342 | /* #define ASM_NO_SKIP_IN_TEXT */ | |
3343 | ||
3344 | /* A C statement to output to the stdio stream STREAM an assembler command to | |
3345 | advance the location counter to a multiple of 2 to the POWER bytes. POWER | |
3346 | will be a C expression of type `int'. */ | |
3347 | #define ASM_OUTPUT_ALIGN(STREAM, POWER) \ | |
3348 | fprintf ((STREAM), "\t.p2align %d\n", (POWER)) | |
3349 | ||
3350 | \f | |
3351 | /* Macros Affecting all Debug Formats. */ | |
3352 | ||
4b58290f GK |
3353 | /* A C expression that returns the integer offset value for an automatic |
3354 | variable having address X (an RTL expression). The default computation | |
3355 | assumes that X is based on the frame-pointer and gives the offset from the | |
3356 | frame-pointer. This is required for targets that produce debugging output | |
3357 | for DBX or COFF-style debugging output for SDB and allow the frame-pointer | |
3358 | to be eliminated when the `-g' options is used. */ | |
3359 | /* #define DEBUGGER_AUTO_OFFSET(X) */ | |
3360 | ||
3361 | /* A C expression that returns the integer offset value for an argument having | |
3362 | address X (an RTL expression). The nominal offset is OFFSET. */ | |
3363 | /* #define DEBUGGER_ARG_OFFSET(OFFSET, X) */ | |
3364 | ||
3365 | /* A C expression that returns the type of debugging output GNU CC produces | |
3366 | when the user specifies `-g' or `-ggdb'. Define this if you have arranged | |
3367 | for GNU CC to support more than one format of debugging output. Currently, | |
3368 | the allowable values are `DBX_DEBUG', `SDB_DEBUG', `DWARF_DEBUG', | |
3369 | `DWARF2_DEBUG', and `XCOFF_DEBUG'. | |
3370 | ||
3371 | The value of this macro only affects the default debugging output; the user | |
3372 | can always get a specific type of output by using `-gstabs', `-gcoff', | |
3373 | `-gdwarf-1', `-gdwarf-2', or `-gxcoff'. | |
3374 | ||
3375 | Defined in svr4.h. */ | |
3376 | #undef PREFERRED_DEBUGGING_TYPE | |
3377 | #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG | |
3378 | ||
3379 | \f | |
3380 | /* Specific Options for DBX Output. */ | |
3381 | ||
3382 | /* Define this macro if GNU CC should produce debugging output for DBX in | |
3383 | response to the `-g' option. | |
3384 | ||
3385 | Defined in svr4.h. */ | |
3386 | /* #define DBX_DEBUGGING_INFO */ | |
3387 | ||
3388 | /* Define this macro if GNU CC should produce XCOFF format debugging output in | |
3389 | response to the `-g' option. This is a variant of DBX format. */ | |
3390 | /* #define XCOFF_DEBUGGING_INFO */ | |
3391 | ||
3392 | /* Define this macro to control whether GNU CC should by default generate GDB's | |
3393 | extended version of DBX debugging information (assuming DBX-format debugging | |
3394 | information is enabled at all). If you don't define the macro, the default | |
3395 | is 1: always generate the extended information if there is any occasion to. */ | |
3396 | /* #define DEFAULT_GDB_EXTENSIONS */ | |
3397 | ||
3398 | /* Define this macro if all `.stabs' commands should be output while in the | |
3399 | text section. */ | |
3400 | /* #define DEBUG_SYMS_TEXT */ | |
3401 | ||
3402 | /* A C string constant naming the assembler pseudo op to use instead of | |
3403 | `.stabs' to define an ordinary debugging symbol. If you don't define this | |
3404 | macro, `.stabs' is used. This macro applies only to DBX debugging | |
3405 | information format. */ | |
3406 | /* #define ASM_STABS_OP */ | |
3407 | ||
3408 | /* A C string constant naming the assembler pseudo op to use instead of | |
3409 | `.stabd' to define a debugging symbol whose value is the current location. | |
3410 | If you don't define this macro, `.stabd' is used. This macro applies only | |
3411 | to DBX debugging information format. */ | |
3412 | /* #define ASM_STABD_OP */ | |
3413 | ||
3414 | /* A C string constant naming the assembler pseudo op to use instead of | |
3415 | `.stabn' to define a debugging symbol with no name. If you don't define | |
3416 | this macro, `.stabn' is used. This macro applies only to DBX debugging | |
3417 | information format. */ | |
3418 | /* #define ASM_STABN_OP */ | |
3419 | ||
3420 | /* Define this macro if DBX on your system does not support the construct | |
3421 | `xsTAGNAME'. On some systems, this construct is used to describe a forward | |
3422 | reference to a structure named TAGNAME. On other systems, this construct is | |
3423 | not supported at all. */ | |
3424 | /* #define DBX_NO_XREFS */ | |
3425 | ||
3426 | /* A symbol name in DBX-format debugging information is normally continued | |
3427 | (split into two separate `.stabs' directives) when it exceeds a certain | |
3428 | length (by default, 80 characters). On some operating systems, DBX requires | |
3429 | this splitting; on others, splitting must not be done. You can inhibit | |
3430 | splitting by defining this macro with the value zero. You can override the | |
3431 | default splitting-length by defining this macro as an expression for the | |
3432 | length you desire. */ | |
3433 | /* #define DBX_CONTIN_LENGTH */ | |
3434 | ||
3435 | /* Normally continuation is indicated by adding a `\' character to the end of a | |
3436 | `.stabs' string when a continuation follows. To use a different character | |
3437 | instead, define this macro as a character constant for the character you | |
3438 | want to use. Do not define this macro if backslash is correct for your | |
3439 | system. */ | |
3440 | /* #define DBX_CONTIN_CHAR */ | |
3441 | ||
3442 | /* Define this macro if it is necessary to go to the data section before | |
3443 | outputting the `.stabs' pseudo-op for a non-global static variable. */ | |
3444 | /* #define DBX_STATIC_STAB_DATA_SECTION */ | |
3445 | ||
3446 | /* The value to use in the "code" field of the `.stabs' directive for a | |
3447 | typedef. The default is `N_LSYM'. */ | |
3448 | /* #define DBX_TYPE_DECL_STABS_CODE */ | |
3449 | ||
3450 | /* The value to use in the "code" field of the `.stabs' directive for a static | |
3451 | variable located in the text section. DBX format does not provide any | |
3452 | "right" way to do this. The default is `N_FUN'. */ | |
3453 | /* #define DBX_STATIC_CONST_VAR_CODE */ | |
3454 | ||
3455 | /* The value to use in the "code" field of the `.stabs' directive for a | |
3456 | parameter passed in registers. DBX format does not provide any "right" way | |
3457 | to do this. The default is `N_RSYM'. */ | |
3458 | /* #define DBX_REGPARM_STABS_CODE */ | |
3459 | ||
3460 | /* The letter to use in DBX symbol data to identify a symbol as a parameter | |
3461 | passed in registers. DBX format does not customarily provide any way to do | |
3462 | this. The default is `'P''. */ | |
3463 | /* #define DBX_REGPARM_STABS_LETTER */ | |
3464 | ||
3465 | /* The letter to use in DBX symbol data to identify a symbol as a stack | |
3466 | parameter. The default is `'p''. */ | |
3467 | /* #define DBX_MEMPARM_STABS_LETTER */ | |
3468 | ||
3469 | /* Define this macro if the DBX information for a function and its arguments | |
3470 | should precede the assembler code for the function. Normally, in DBX | |
3471 | format, the debugging information entirely follows the assembler code. | |
3472 | ||
3473 | Defined in svr4.h. */ | |
3474 | /* #define DBX_FUNCTION_FIRST */ | |
3475 | ||
3476 | /* Define this macro if the `N_LBRAC' symbol for a block should precede the | |
3477 | debugging information for variables and functions defined in that block. | |
3478 | Normally, in DBX format, the `N_LBRAC' symbol comes first. */ | |
3479 | /* #define DBX_LBRAC_FIRST */ | |
3480 | ||
3481 | /* Define this macro if the value of a symbol describing the scope of a block | |
3482 | (`N_LBRAC' or `N_RBRAC') should be relative to the start of the enclosing | |
3483 | function. Normally, GNU C uses an absolute address. | |
3484 | ||
3485 | Defined in svr4.h. */ | |
3486 | /* #define DBX_BLOCKS_FUNCTION_RELATIVE */ | |
3487 | ||
3488 | /* Define this macro if GNU C should generate `N_BINCL' and `N_EINCL' | |
3489 | stabs for included header files, as on Sun systems. This macro | |
3490 | also directs GNU C to output a type number as a pair of a file | |
3491 | number and a type number within the file. Normally, GNU C does not | |
3492 | generate `N_BINCL' or `N_EINCL' stabs, and it outputs a single | |
3493 | number for a type number. */ | |
3494 | /* #define DBX_USE_BINCL */ | |
3495 | ||
3496 | \f | |
3497 | /* Open ended Hooks for DBX Output. */ | |
3498 | ||
3499 | /* Define this macro to say how to output to STREAM the debugging information | |
3500 | for the start of a scope level for variable names. The argument NAME is the | |
3501 | name of an assembler symbol (for use with `assemble_name') whose value is | |
3502 | the address where the scope begins. */ | |
3503 | /* #define DBX_OUTPUT_LBRAC(STREAM, NAME) */ | |
3504 | ||
3505 | /* Like `DBX_OUTPUT_LBRAC', but for the end of a scope level. */ | |
3506 | /* #define DBX_OUTPUT_RBRAC(STREAM, NAME) */ | |
3507 | ||
3508 | /* Define this macro if the target machine requires special handling to output | |
3509 | an enumeration type. The definition should be a C statement (sans | |
3510 | semicolon) to output the appropriate information to STREAM for the type | |
3511 | TYPE. */ | |
3512 | /* #define DBX_OUTPUT_ENUM(STREAM, TYPE) */ | |
3513 | ||
3514 | /* Define this macro if the target machine requires special output at the end | |
3515 | of the debugging information for a function. The definition should be a C | |
3516 | statement (sans semicolon) to output the appropriate information to STREAM. | |
3517 | FUNCTION is the `FUNCTION_DECL' node for the function. */ | |
3518 | /* #define DBX_OUTPUT_FUNCTION_END(STREAM, FUNCTION) */ | |
3519 | ||
3520 | /* Define this macro if you need to control the order of output of the standard | |
3521 | data types at the beginning of compilation. The argument SYMS is a `tree' | |
3522 | which is a chain of all the predefined global symbols, including names of | |
3523 | data types. | |
3524 | ||
3525 | Normally, DBX output starts with definitions of the types for integers and | |
3526 | characters, followed by all the other predefined types of the particular | |
3527 | language in no particular order. | |
3528 | ||
3529 | On some machines, it is necessary to output different particular types | |
3530 | first. To do this, define `DBX_OUTPUT_STANDARD_TYPES' to output those | |
3531 | symbols in the necessary order. Any predefined types that you don't | |
3532 | explicitly output will be output afterward in no particular order. | |
3533 | ||
3534 | Be careful not to define this macro so that it works only for C. There are | |
3535 | no global variables to access most of the built-in types, because another | |
3536 | language may have another set of types. The way to output a particular type | |
3537 | is to look through SYMS to see if you can find it. Here is an example: | |
3538 | ||
3539 | { | |
3540 | tree decl; | |
3541 | for (decl = syms; decl; decl = TREE_CHAIN (decl)) | |
3542 | if (!strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)), | |
3543 | "long int")) | |
3544 | dbxout_symbol (decl); | |
3545 | ... | |
3546 | } | |
3547 | ||
3548 | This does nothing if the expected type does not exist. | |
3549 | ||
3550 | See the function `init_decl_processing' in `c-decl.c' to find the names to | |
b1c9bc51 | 3551 | use for all the built-in C types. */ |
4b58290f GK |
3552 | /* #define DBX_OUTPUT_STANDARD_TYPES(SYMS) */ |
3553 | ||
3554 | /* Some stabs encapsulation formats (in particular ECOFF), cannot | |
3555 | handle the `.stabs "",N_FUN,,0,0,Lscope-function-1' gdb dbx | |
f710504c | 3556 | extension construct. On those machines, define this macro to turn |
4b58290f GK |
3557 | this feature off without disturbing the rest of the gdb extensions. */ |
3558 | /* #define NO_DBX_FUNCTION_END */ | |
3559 | ||
3560 | \f | |
3561 | /* File names in DBX format. */ | |
3562 | ||
3563 | /* Define this if DBX wants to have the current directory recorded in each | |
3564 | object file. | |
3565 | ||
3566 | Note that the working directory is always recorded if GDB extensions are | |
3567 | enabled. */ | |
3568 | /* #define DBX_WORKING_DIRECTORY */ | |
3569 | ||
3570 | /* A C statement to output DBX debugging information to the stdio stream STREAM | |
3571 | which indicates that file NAME is the main source file--the file specified | |
3572 | as the input file for compilation. This macro is called only once, at the | |
3573 | beginning of compilation. | |
3574 | ||
3575 | This macro need not be defined if the standard form of output for DBX | |
3576 | debugging information is appropriate. | |
3577 | ||
3578 | Defined in svr4.h. */ | |
3579 | /* #define DBX_OUTPUT_MAIN_SOURCE_FILENAME(STREAM, NAME) */ | |
3580 | ||
3581 | /* A C statement to output DBX debugging information to the stdio stream STREAM | |
3582 | which indicates that the current directory during compilation is named NAME. | |
3583 | ||
3584 | This macro need not be defined if the standard form of output for DBX | |
3585 | debugging information is appropriate. */ | |
3586 | /* #define DBX_OUTPUT_MAIN_SOURCE_DIRECTORY(STREAM, NAME) */ | |
3587 | ||
3588 | /* A C statement to output DBX debugging information at the end of compilation | |
3589 | of the main source file NAME. | |
3590 | ||
3591 | If you don't define this macro, nothing special is output at the end of | |
3592 | compilation, which is correct for most machines. */ | |
3593 | /* #define DBX_OUTPUT_MAIN_SOURCE_FILE_END(STREAM, NAME) */ | |
3594 | ||
3595 | /* A C statement to output DBX debugging information to the stdio stream STREAM | |
3596 | which indicates that file NAME is the current source file. This output is | |
3597 | generated each time input shifts to a different source file as a result of | |
3598 | `#include', the end of an included file, or a `#line' command. | |
3599 | ||
3600 | This macro need not be defined if the standard form of output for DBX | |
3601 | debugging information is appropriate. */ | |
3602 | /* #define DBX_OUTPUT_SOURCE_FILENAME(STREAM, NAME) */ | |
3603 | ||
3604 | \f | |
3605 | /* Macros for SDB and Dwarf Output. */ | |
3606 | ||
3607 | /* Define this macro if GNU CC should produce COFF-style debugging output for | |
3608 | SDB in response to the `-g' option. */ | |
3609 | /* #define SDB_DEBUGGING_INFO */ | |
3610 | ||
3611 | /* Define this macro if GNU CC should produce dwarf format debugging output in | |
3612 | response to the `-g' option. | |
3613 | ||
3614 | Defined in svr4.h. */ | |
3615 | /* #define DWARF_DEBUGGING_INFO */ | |
3616 | ||
3617 | /* Define this macro if GNU CC should produce dwarf version 2 format debugging | |
3618 | output in response to the `-g' option. | |
3619 | ||
3620 | To support optional call frame debugging information, you must also define | |
3621 | `INCOMING_RETURN_ADDR_RTX' and either set `RTX_FRAME_RELATED_P' on the | |
3622 | prologue insns if you use RTL for the prologue, or call `dwarf2out_def_cfa' | |
41441dc7 NB |
3623 | and `dwarf2out_reg_save' as appropriate from `TARGET_ASM_FUNCTION_PROLOGUE' |
3624 | if you don't. | |
4b58290f GK |
3625 | |
3626 | Defined in svr4.h. */ | |
3627 | /* #define DWARF2_DEBUGGING_INFO */ | |
3628 | ||
3629 | /* Define this macro if GNU CC should produce dwarf version 2-style | |
3630 | line numbers. This usually requires extending the assembler to | |
3631 | support them, and #defining DWARF2_LINE_MIN_INSN_LENGTH in the | |
3632 | assembler configuration header files. */ | |
3633 | /* #define DWARF2_ASM_LINE_DEBUG_INFO 1 */ | |
3634 | ||
3635 | /* Define this macro if addresses in Dwarf 2 debugging info should not | |
3636 | be the same size as pointers on the target architecture. The | |
3637 | macro's value should be the size, in bytes, to use for addresses in | |
3638 | the debugging info. | |
3639 | ||
3640 | Some architectures use word addresses to refer to code locations, | |
3641 | but Dwarf 2 info always uses byte addresses. On such machines, | |
3642 | Dwarf 2 addresses need to be larger than the architecture's | |
3643 | pointers. */ | |
3644 | #define DWARF2_ADDR_SIZE 4 | |
3645 | ||
3646 | /* Define these macros to override the assembler syntax for the special SDB | |
3647 | assembler directives. See `sdbout.c' for a list of these macros and their | |
3648 | arguments. If the standard syntax is used, you need not define them | |
3649 | yourself. */ | |
b1c9bc51 | 3650 | /* #define PUT_SDB_... */ |
4b58290f GK |
3651 | |
3652 | /* Some assemblers do not support a semicolon as a delimiter, even between SDB | |
3653 | assembler directives. In that case, define this macro to be the delimiter | |
3654 | to use (usually `\n'). It is not necessary to define a new set of | |
3655 | `PUT_SDB_OP' macros if this is the only change required. */ | |
3656 | /* #define SDB_DELIM */ | |
3657 | ||
3658 | /* Define this macro to override the usual method of constructing a dummy name | |
3659 | for anonymous structure and union types. See `sdbout.c' for more | |
3660 | information. */ | |
3661 | /* #define SDB_GENERATE_FAKE */ | |
3662 | ||
3663 | /* Define this macro to allow references to unknown structure, union, or | |
3664 | enumeration tags to be emitted. Standard COFF does not allow handling of | |
3665 | unknown references, MIPS ECOFF has support for it. */ | |
3666 | /* #define SDB_ALLOW_UNKNOWN_REFERENCES */ | |
3667 | ||
3668 | /* Define this macro to allow references to structure, union, or enumeration | |
3669 | tags that have not yet been seen to be handled. Some assemblers choke if | |
3670 | forward tags are used, while some require it. */ | |
3671 | /* #define SDB_ALLOW_FORWARD_REFERENCES */ | |
3672 | ||
3673 | \f | |
3674 | /* Miscellaneous Parameters. */ | |
3675 | ||
4b58290f GK |
3676 | /* Define this if you have defined special-purpose predicates in the file |
3677 | `MACHINE.c'. This macro is called within an initializer of an array of | |
3678 | structures. The first field in the structure is the name of a predicate and | |
3679 | the second field is an array of rtl codes. For each predicate, list all rtl | |
3680 | codes that can be in expressions matched by the predicate. The list should | |
3681 | have a trailing comma. Here is an example of two entries in the list for a | |
3682 | typical RISC machine: | |
3683 | ||
3684 | #define PREDICATE_CODES \ | |
3685 | {"gen_reg_rtx_operand", {SUBREG, REG}}, \ | |
3686 | {"reg_or_short_cint_operand", {SUBREG, REG, CONST_INT}}, | |
3687 | ||
3688 | Defining this macro does not affect the generated code (however, incorrect | |
3689 | definitions that omit an rtl code that may be matched by the predicate can | |
3690 | cause the compiler to malfunction). Instead, it allows the table built by | |
3691 | `genrecog' to be more compact and efficient, thus speeding up the compiler. | |
3692 | The most important predicates to include in the list specified by this macro | |
3693 | are thoses used in the most insn patterns. */ | |
3694 | #define PREDICATE_CODES \ | |
3695 | {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT }}, \ | |
3696 | {"equality_operator", {EQ, NE }}, \ | |
3697 | {"inequality_operator", {GE, GT, LE, LT, GEU, GTU, LEU, LTU }}, \ | |
5ee4950e AH |
3698 | {"xstormy16_ineqsi_operator", {LT, GE, LTU, GEU }}, \ |
3699 | {"nonimmediate_nonstack_operand", {REG, MEM}}, | |
4b58290f GK |
3700 | /* An alias for a machine mode name. This is the machine mode that elements of |
3701 | a jump-table should have. */ | |
3702 | #define CASE_VECTOR_MODE SImode | |
3703 | ||
3704 | /* Define as C expression which evaluates to nonzero if the tablejump | |
3705 | instruction expects the table to contain offsets from the address of the | |
3706 | table. | |
b1c9bc51 | 3707 | Do not define this if the table should contain absolute addresses. */ |
4b58290f GK |
3708 | /* #define CASE_VECTOR_PC_RELATIVE 1 */ |
3709 | ||
3710 | /* Define this if control falls through a `case' insn when the index value is | |
3711 | out of range. This means the specified default-label is actually ignored by | |
3712 | the `case' insn proper. */ | |
3713 | /* #define CASE_DROPS_THROUGH */ | |
3714 | ||
3715 | /* Define this to be the smallest number of different values for which it is | |
3716 | best to use a jump-table instead of a tree of conditional branches. The | |
3717 | default is four for machines with a `casesi' instruction and five otherwise. | |
3718 | This is best for most machines. */ | |
3719 | /* #define CASE_VALUES_THRESHOLD */ | |
3720 | ||
3721 | /* Define this macro if operations between registers with integral mode smaller | |
3722 | than a word are always performed on the entire register. Most RISC machines | |
3723 | have this property and most CISC machines do not. */ | |
3724 | #define WORD_REGISTER_OPERATIONS | |
3725 | ||
3726 | /* Define this macro to be a C expression indicating when insns that read | |
3727 | memory in MODE, an integral mode narrower than a word, set the bits outside | |
3728 | of MODE to be either the sign-extension or the zero-extension of the data | |
3729 | read. Return `SIGN_EXTEND' for values of MODE for which the insn | |
3730 | sign-extends, `ZERO_EXTEND' for which it zero-extends, and `NIL' for other | |
3731 | modes. | |
3732 | ||
3733 | This macro is not called with MODE non-integral or with a width greater than | |
3734 | or equal to `BITS_PER_WORD', so you may return any value in this case. Do | |
3735 | not define this macro if it would always return `NIL'. On machines where | |
3736 | this macro is defined, you will normally define it as the constant | |
3737 | `SIGN_EXTEND' or `ZERO_EXTEND'. */ | |
3738 | #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND | |
3739 | ||
3740 | /* Define if loading short immediate values into registers sign extends. */ | |
3741 | /* #define SHORT_IMMEDIATES_SIGN_EXTEND */ | |
3742 | ||
4b58290f GK |
3743 | /* Define this macro if the same instructions that convert a floating point |
3744 | number to a signed fixed point number also convert validly to an unsigned | |
3745 | one. */ | |
3746 | /* #define FIXUNS_TRUNC_LIKE_FIX_TRUNC */ | |
3747 | ||
4b58290f GK |
3748 | /* The maximum number of bytes that a single instruction can move quickly from |
3749 | memory to memory. */ | |
3750 | #define MOVE_MAX 2 | |
3751 | ||
3752 | /* The maximum number of bytes that a single instruction can move quickly from | |
3753 | memory to memory. If this is undefined, the default is `MOVE_MAX'. | |
3754 | Otherwise, it is the constant value that is the largest value that | |
3755 | `MOVE_MAX' can have at run-time. */ | |
3756 | /* #define MAX_MOVE_MAX */ | |
3757 | ||
3758 | /* A C expression that is nonzero if on this machine the number of bits | |
3759 | actually used for the count of a shift operation is equal to the number of | |
3760 | bits needed to represent the size of the object being shifted. When this | |
3761 | macro is non-zero, the compiler will assume that it is safe to omit a | |
3762 | sign-extend, zero-extend, and certain bitwise `and' instructions that | |
3763 | truncates the count of a shift operation. On machines that have | |
3764 | instructions that act on bitfields at variable positions, which may include | |
3765 | `bit test' instructions, a nonzero `SHIFT_COUNT_TRUNCATED' also enables | |
3766 | deletion of truncations of the values that serve as arguments to bitfield | |
3767 | instructions. | |
3768 | ||
3769 | If both types of instructions truncate the count (for shifts) and position | |
3770 | (for bitfield operations), or if no variable-position bitfield instructions | |
3771 | exist, you should define this macro. | |
3772 | ||
3773 | However, on some machines, such as the 80386 and the 680x0, truncation only | |
3774 | applies to shift operations and not the (real or pretended) bitfield | |
3775 | operations. Define `SHIFT_COUNT_TRUNCATED' to be zero on such machines. | |
3776 | Instead, add patterns to the `md' file that include the implied truncation | |
3777 | of the shift instructions. | |
3778 | ||
3779 | You need not define this macro if it would always have the value of zero. */ | |
3780 | #define SHIFT_COUNT_TRUNCATED 1 | |
3781 | ||
3782 | /* A C expression which is nonzero if on this machine it is safe to "convert" | |
3783 | an integer of INPREC bits to one of OUTPREC bits (where OUTPREC is smaller | |
3784 | than INPREC) by merely operating on it as if it had only OUTPREC bits. | |
3785 | ||
3786 | On many machines, this expression can be 1. | |
3787 | ||
3788 | When `TRULY_NOOP_TRUNCATION' returns 1 for a pair of sizes for modes for | |
3789 | which `MODES_TIEABLE_P' is 0, suboptimal code can result. If this is the | |
3790 | case, making `TRULY_NOOP_TRUNCATION' return 0 in such cases may improve | |
3791 | things. */ | |
3792 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
3793 | ||
3794 | /* A C expression describing the value returned by a comparison operator with | |
3795 | an integral mode and stored by a store-flag instruction (`sCOND') when the | |
3796 | condition is true. This description must apply to *all* the `sCOND' | |
3797 | patterns and all the comparison operators whose results have a `MODE_INT' | |
3798 | mode. | |
3799 | ||
3800 | A value of 1 or -1 means that the instruction implementing the comparison | |
3801 | operator returns exactly 1 or -1 when the comparison is true and 0 when the | |
3802 | comparison is false. Otherwise, the value indicates which bits of the | |
3803 | result are guaranteed to be 1 when the comparison is true. This value is | |
3804 | interpreted in the mode of the comparison operation, which is given by the | |
3805 | mode of the first operand in the `sCOND' pattern. Either the low bit or the | |
3806 | sign bit of `STORE_FLAG_VALUE' be on. Presently, only those bits are used | |
3807 | by the compiler. | |
3808 | ||
3809 | If `STORE_FLAG_VALUE' is neither 1 or -1, the compiler will generate code | |
3810 | that depends only on the specified bits. It can also replace comparison | |
3811 | operators with equivalent operations if they cause the required bits to be | |
3812 | set, even if the remaining bits are undefined. For example, on a machine | |
3813 | whose comparison operators return an `SImode' value and where | |
3814 | `STORE_FLAG_VALUE' is defined as `0x80000000', saying that just the sign bit | |
3815 | is relevant, the expression | |
3816 | ||
3817 | (ne:SI (and:SI X (const_int POWER-OF-2)) (const_int 0)) | |
3818 | ||
3819 | can be converted to | |
3820 | ||
3821 | (ashift:SI X (const_int N)) | |
3822 | ||
3823 | where N is the appropriate shift count to move the bit being tested into the | |
3824 | sign bit. | |
3825 | ||
3826 | There is no way to describe a machine that always sets the low-order bit for | |
3827 | a true value, but does not guarantee the value of any other bits, but we do | |
3828 | not know of any machine that has such an instruction. If you are trying to | |
3829 | port GNU CC to such a machine, include an instruction to perform a | |
3830 | logical-and of the result with 1 in the pattern for the comparison operators | |
3831 | and let us know. | |
3832 | ||
3833 | Often, a machine will have multiple instructions that obtain a value from a | |
3834 | comparison (or the condition codes). Here are rules to guide the choice of | |
3835 | value for `STORE_FLAG_VALUE', and hence the instructions to be used: | |
3836 | ||
3837 | * Use the shortest sequence that yields a valid definition for | |
3838 | `STORE_FLAG_VALUE'. It is more efficient for the compiler to | |
3839 | "normalize" the value (convert it to, e.g., 1 or 0) than for | |
3840 | the comparison operators to do so because there may be | |
3841 | opportunities to combine the normalization with other | |
3842 | operations. | |
3843 | ||
3844 | * For equal-length sequences, use a value of 1 or -1, with -1 | |
3845 | being slightly preferred on machines with expensive jumps and | |
3846 | 1 preferred on other machines. | |
3847 | ||
3848 | * As a second choice, choose a value of `0x80000001' if | |
3849 | instructions exist that set both the sign and low-order bits | |
3850 | but do not define the others. | |
3851 | ||
3852 | * Otherwise, use a value of `0x80000000'. | |
3853 | ||
3854 | Many machines can produce both the value chosen for `STORE_FLAG_VALUE' and | |
3855 | its negation in the same number of instructions. On those machines, you | |
3856 | should also define a pattern for those cases, e.g., one matching | |
3857 | ||
3858 | (set A (neg:M (ne:M B C))) | |
3859 | ||
3860 | Some machines can also perform `and' or `plus' operations on condition code | |
3861 | values with less instructions than the corresponding `sCOND' insn followed | |
3862 | by `and' or `plus'. On those machines, define the appropriate patterns. | |
27d30956 | 3863 | Use the names `incscc' and `decscc', respectively, for the patterns |
4b58290f GK |
3864 | which perform `plus' or `minus' operations on condition code values. See |
3865 | `rs6000.md' for some examples. The GNU Superoptizer can be used to find | |
3866 | such instruction sequences on other machines. | |
3867 | ||
3868 | You need not define `STORE_FLAG_VALUE' if the machine has no store-flag | |
3869 | instructions. */ | |
3870 | /* #define STORE_FLAG_VALUE */ | |
3871 | ||
3872 | /* A C expression that gives a non-zero floating point value that is returned | |
3873 | when comparison operators with floating-point results are true. Define this | |
3874 | macro on machine that have comparison operations that return floating-point | |
3875 | values. If there are no such operations, do not define this macro. */ | |
3876 | /* #define FLOAT_STORE_FLAG_VALUE */ | |
3877 | ||
3878 | /* An alias for the machine mode for pointers. On most machines, define this | |
3879 | to be the integer mode corresponding to the width of a hardware pointer; | |
3880 | `SImode' on 32-bit machine or `DImode' on 64-bit machines. On some machines | |
3881 | you must define this to be one of the partial integer modes, such as | |
3882 | `PSImode'. | |
3883 | ||
3884 | The width of `Pmode' must be at least as large as the value of | |
3885 | `POINTER_SIZE'. If it is not equal, you must define the macro | |
3886 | `POINTERS_EXTEND_UNSIGNED' to specify how pointers are extended to `Pmode'. */ | |
3887 | #define Pmode HImode | |
3888 | ||
3889 | /* An alias for the machine mode used for memory references to functions being | |
3890 | called, in `call' RTL expressions. On most machines this should be | |
3891 | `QImode'. */ | |
3892 | #define FUNCTION_MODE HImode | |
3893 | ||
3894 | /* A C expression for the maximum number of instructions above which the | |
3895 | function DECL should not be inlined. DECL is a `FUNCTION_DECL' node. | |
3896 | ||
3897 | The default definition of this macro is 64 plus 8 times the number of | |
3898 | arguments that the function accepts. Some people think a larger threshold | |
3899 | should be used on RISC machines. */ | |
3900 | /* #define INTEGRATE_THRESHOLD(DECL) */ | |
3901 | ||
4b58290f GK |
3902 | /* Define this macro if the system header files support C++ as well as C. This |
3903 | macro inhibits the usual method of using system header files in C++, which | |
3904 | is to pretend that the file's contents are enclosed in `extern "C" {...}'. */ | |
3905 | #define NO_IMPLICIT_EXTERN_C | |
3906 | ||
3907 | /* Define this macro if you want to implement any pragmas. If defined, it | |
3908 | should be a C expression to be executed when #pragma is seen. The | |
3909 | argument GETC is a function which will return the next character in the | |
3910 | input stream, or EOF if no characters are left. The argument UNGETC is | |
3911 | a function which will push a character back into the input stream. The | |
3912 | argument NAME is the word following #pragma in the input stream. The input | |
3913 | stream pointer will be pointing just beyond the end of this word. The | |
3914 | expression should return true if it handled the pragma, false otherwise. | |
3915 | The input stream should be left undistrubed if false is returned, otherwise | |
3916 | it should be pointing at the next character after the end of the pragma. | |
3917 | Any characters left between the end of the pragma and the end of the line will | |
3918 | be ignored. | |
3919 | ||
3920 | It is generally a bad idea to implement new uses of `#pragma'. The only | |
3921 | reason to define this macro is for compatibility with other compilers that | |
3922 | do support `#pragma' for the sake of any user programs which already use it. */ | |
3923 | /* #define HANDLE_PRAGMA(GETC, UNGETC, NAME) handle_pragma (GETC, UNGETC, NAME) */ | |
3924 | ||
3925 | /* Define this macro to handle System V style pragmas: #pragma pack and | |
3926 | #pragma weak. Note, #pragma weak will only be supported if SUPPORT_WEAK is | |
3927 | defined. | |
3928 | ||
3929 | Defined in svr4.h. */ | |
3930 | #define HANDLE_SYSV_PRAGMA | |
3931 | ||
3932 | /* Define this macro if you want to support the Win32 style pragmas | |
b1c9bc51 | 3933 | #pragma pack(push,<n>) and #pragma pack(pop). */ |
4b58290f GK |
3934 | /* HANDLE_PRAGMA_PACK_PUSH_POP 1 */ |
3935 | ||
4b58290f GK |
3936 | /* Define this macro if the assembler does not accept the character `$' in |
3937 | label names. By default constructors and destructors in G++ have `$' in the | |
3938 | identifiers. If this macro is defined, `.' is used instead. | |
3939 | ||
3940 | Defined in svr4.h. */ | |
3941 | /* #define NO_DOLLAR_IN_LABEL */ | |
3942 | ||
3943 | /* Define this macro if the assembler does not accept the character `.' in | |
3944 | label names. By default constructors and destructors in G++ have names that | |
3945 | use `.'. If this macro is defined, these names are rewritten to avoid `.'. */ | |
3946 | /* #define NO_DOT_IN_LABEL */ | |
3947 | ||
3948 | /* Define this macro if the target system expects every program's `main' | |
3949 | function to return a standard "success" value by default (if no other value | |
3950 | is explicitly returned). | |
3951 | ||
3952 | The definition should be a C statement (sans semicolon) to generate the | |
3953 | appropriate rtl instructions. It is used only when compiling the end of | |
3954 | `main'. */ | |
3955 | /* #define DEFAULT_MAIN_RETURN */ | |
3956 | ||
3957 | /* Define this if the target system supports the function `atexit' from the | |
3958 | ANSI C standard. If this is not defined, and `INIT_SECTION_ASM_OP' is not | |
3959 | defined, a default `exit' function will be provided to support C++. | |
3960 | ||
3961 | Defined by svr4.h */ | |
3962 | /* #define HAVE_ATEXIT */ | |
3963 | ||
3964 | /* Define this if your `exit' function needs to do something besides calling an | |
3965 | external function `_cleanup' before terminating with `_exit'. The | |
3966 | `EXIT_BODY' macro is only needed if netiher `HAVE_ATEXIT' nor | |
3967 | `INIT_SECTION_ASM_OP' are defined. */ | |
3968 | /* #define EXIT_BODY */ | |
3969 | ||
3970 | /* Define this macro as a C expression that is nonzero if it is safe for the | |
3971 | delay slot scheduler to place instructions in the delay slot of INSN, even | |
3972 | if they appear to use a resource set or clobbered in INSN. INSN is always a | |
3973 | `jump_insn' or an `insn'; GNU CC knows that every `call_insn' has this | |
3974 | behavior. On machines where some `insn' or `jump_insn' is really a function | |
3975 | call and hence has this behavior, you should define this macro. | |
3976 | ||
3977 | You need not define this macro if it would always return zero. */ | |
3978 | /* #define INSN_SETS_ARE_DELAYED(INSN) */ | |
3979 | ||
3980 | /* Define this macro as a C expression that is nonzero if it is safe for the | |
3981 | delay slot scheduler to place instructions in the delay slot of INSN, even | |
3982 | if they appear to set or clobber a resource referenced in INSN. INSN is | |
3983 | always a `jump_insn' or an `insn'. On machines where some `insn' or | |
3984 | `jump_insn' is really a function call and its operands are registers whose | |
3985 | use is actually in the subroutine it calls, you should define this macro. | |
3986 | Doing so allows the delay slot scheduler to move instructions which copy | |
3987 | arguments into the argument registers into the delay slot of INSN. | |
3988 | ||
3989 | You need not define this macro if it would always return zero. */ | |
3990 | /* #define INSN_REFERENCES_ARE_DELAYED(INSN) */ | |
3991 | ||
3992 | /* In rare cases, correct code generation requires extra machine dependent | |
3993 | processing between the second jump optimization pass and delayed branch | |
3994 | scheduling. On those machines, define this macro as a C statement to act on | |
3995 | the code starting at INSN. */ | |
3996 | /* #define MACHINE_DEPENDENT_REORG(INSN) */ | |
3997 | ||
3998 | /* Define this macro if in some cases global symbols from one translation unit | |
3999 | may not be bound to undefined symbols in another translation unit without | |
4000 | user intervention. For instance, under Microsoft Windows symbols must be | |
4001 | explicitly imported from shared libraries (DLLs). */ | |
4002 | /* #define MULTIPLE_SYMBOL_SPACES */ | |
4003 | ||
4004 | /* A C expression for the maximum number of instructions to execute via | |
4005 | conditional execution instructions instead of a branch. A value of | |
4006 | BRANCH_COST+1 is the default if the machine does not use | |
4007 | cc0, and 1 if it does use cc0. */ | |
4008 | /* #define MAX_CONDITIONAL_EXECUTE */ | |
4009 | ||
4010 | /* A C statement that adds to tree CLOBBERS a set of STRING_CST trees for any | |
b1c9bc51 | 4011 | hard regs the port wishes to automatically clobber for all asms. */ |
4b58290f GK |
4012 | /* #define MD_ASM_CLOBBERS(CLOBBERS) */ |
4013 | ||
4014 | /* Indicate how many instructions can be issued at the same time. */ | |
4015 | /* #define ISSUE_RATE */ | |
4016 | ||
4017 | /* A C statement which is executed by the Haifa scheduler at the beginning of | |
4018 | each block of instructions that are to be scheduled. FILE is either a null | |
4019 | pointer, or a stdio stream to write any debug output to. VERBOSE is the | |
b1c9bc51 | 4020 | verbose level provided by -fsched-verbose-<n>. */ |
4b58290f GK |
4021 | /* #define MD_SCHED_INIT (FILE, VERBOSE) */ |
4022 | ||
4023 | /* A C statement which is executed by the Haifa scheduler after it has scheduled | |
4024 | the ready list to allow the machine description to reorder it (for example to | |
4025 | combine two small instructions together on VLIW machines). FILE is either a | |
4026 | null pointer, or a stdio stream to write any debug output to. VERBOSE is the | |
4027 | verbose level provided by -fsched-verbose-=<n>. READY is a pointer to the | |
4028 | ready list of instructions that are ready to be scheduled. N_READY is the | |
4029 | number of elements in the ready list. The scheduler reads the ready list in | |
4030 | reverse order, starting with READY[N_READY-1] and going to READY[0]. CLOCK | |
4031 | is the timer tick of the scheduler. CAN_ISSUE_MORE is an output parameter that | |
4032 | is set to the number of insns that can issue this clock; normally this is just | |
4033 | 'issue_rate' */ | |
4034 | /* #define MD_SCHED_REORDER (FILE, VERBOSE, READY, N_READY, CLOCK, CAN_ISSUE_MORE) */ | |
4035 | ||
4036 | /* A C statement which is executed by the Haifa scheduler after it has scheduled | |
4037 | an insn from the ready list. FILE is either a null pointer, or a stdio stream | |
4038 | to write any debug output to. VERBOSE is the verbose level provided by | |
4039 | -fsched-verbose-<n>. INSN is the instruction that was scheduled. MORE is the | |
4040 | number of instructions that can be issued in the current cycle. This macro | |
b1c9bc51 | 4041 | is responsible for updating the value of MORE (typically by (MORE)--). */ |
4b58290f GK |
4042 | /* #define MD_SCHED_VARIABLE_ISSUE (FILE, VERBOSE, INSN, MORE) */ |
4043 | ||
4044 | /* Define this to the largest integer machine mode which can be used for | |
4045 | operations other than load, store and copy operations. You need only define | |
4046 | this macro if the target holds values larger than word_mode in general purpose | |
4047 | registers. Most targets should not define this macro. */ | |
4048 | /* #define MAX_INTEGER_COMPUTATION_MODE */ | |
4049 | ||
4050 | /* Define this macro as a C string constant for the linker argument to link in the | |
4051 | system math library, or "" if the target does not have a separate math library. | |
b1c9bc51 | 4052 | You need only define this macro if the default of "-lm" is wrong. */ |
4b58290f GK |
4053 | /* #define MATH_LIBRARY */ |
4054 | \f | |
4055 | /* Define the information needed to generate branch and scc insns. This is | |
4056 | stored from the compare operation. Note that we can't use "rtx" here | |
4057 | since it hasn't been defined! */ | |
4058 | ||
c6243b4c | 4059 | extern struct rtx_def *xstormy16_compare_op0, *xstormy16_compare_op1; |
4b58290f | 4060 | |
c6243b4c | 4061 | /* End of xstormy16.h */ |