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1 | /* Definitions of target machine for GNU compiler, for the M32R/D cpu. |
2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc. | |
3 | ||
4 | This file is part of GNU CC. | |
5 | ||
6 | GNU CC is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2, or (at your option) | |
9 | any later version. | |
10 | ||
11 | GNU CC is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GNU CC; see the file COPYING. If not, write to | |
18 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
19 | Boston, MA 02111-1307, USA. */ | |
20 | ||
21 | /* Things to do: | |
22 | - longlong.h? | |
23 | */ | |
24 | ||
25 | /* FIXME: Create elf.h and have svr4.h include it. */ | |
26 | #include "svr4.h" | |
27 | ||
28 | #undef SWITCH_TAKES_ARG | |
29 | #undef WORD_SWITCH_TAKES_ARG | |
30 | #undef HANDLE_SYSV_PRAGMA | |
31 | #undef SIZE_TYPE | |
32 | #undef PTRDIFF_TYPE | |
33 | #undef WCHAR_TYPE | |
34 | #undef WCHAR_TYPE_SIZE | |
35 | #undef ASM_FILE_START | |
36 | #undef ASM_OUTPUT_EXTERNAL_LIBCALL | |
37 | \f | |
38 | /* Print subsidiary information on the compiler version in use. */ | |
39 | #define TARGET_VERSION fprintf (stderr, " (m32r)") | |
40 | ||
41 | /* Switch Recognition by gcc.c. Add -G xx support */ | |
42 | ||
43 | #undef SWITCH_TAKES_ARG | |
44 | #define SWITCH_TAKES_ARG(CHAR) \ | |
45 | (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G') | |
46 | ||
47 | /* Names to predefine in the preprocessor for this target machine. */ | |
48 | /* __M32R__ is defined by the existing compiler so we use that. */ | |
49 | #define CPP_PREDEFINES "-Acpu(m32r) -Amachine(m32r) -D__M32R__" | |
50 | ||
51 | /* Additional flags for the preprocessor. */ | |
52 | #define CPP_SPEC "" | |
53 | ||
54 | #define CC1_SPEC "%{G*}" | |
55 | ||
56 | #undef ASM_SPEC | |
57 | #if 0 /* not supported yet */ | |
58 | #define ASM_SPEC "%{v} %{mrelax:-relax}" | |
59 | #else | |
60 | #define ASM_SPEC "%{v}" | |
61 | #endif | |
62 | ||
63 | #undef ASM_FINAL_SPEC | |
64 | ||
65 | #undef LINK_SPEC | |
66 | #if 0 /* not supported yet */ | |
67 | #define LINK_SPEC "%{v} %{mrelax:-relax}" | |
68 | #else | |
69 | #define LINK_SPEC "%{v}" | |
70 | #endif | |
71 | ||
72 | #undef STARTFILE_SPEC | |
73 | #define STARTFILE_SPEC "%{!shared:crt0.o%s crtsysc.o%s} crtinit.o%s" | |
74 | ||
75 | #undef ENDFILE_SPEC | |
76 | #define ENDFILE_SPEC "crtfini.o%s" | |
77 | ||
78 | #undef LIB_SPEC | |
79 | \f | |
80 | /* Run-time compilation parameters selecting different hardware subsets. */ | |
81 | ||
82 | extern int target_flags; | |
83 | ||
84 | /* If non-zero, tell the linker to do relaxing. | |
85 | We don't do anything with the option, other than recognize it. | |
86 | LINK_SPEC handles passing -relax to the linker. | |
87 | This can cause incorrect debugging information as line numbers may | |
88 | turn out wrong. This shouldn't be specified unless accompanied with -O2 | |
89 | [where the user expects debugging information to be less accurate]. */ | |
90 | #define TARGET_RELAX_MASK 1 | |
91 | ||
92 | /* For miscellaneous debugging purposes. */ | |
93 | #define TARGET_DEBUG_MASK 2 | |
94 | #define TARGET_DEBUG (target_flags & TARGET_DEBUG_MASK) | |
95 | ||
96 | /* Align loops to 32 byte boundaries (cache line size). */ | |
97 | /* ??? This option is experimental and is not documented. */ | |
98 | #define TARGET_ALIGN_LOOPS_MASK 4 | |
99 | #define TARGET_ALIGN_LOOPS (target_flags & TARGET_ALIGN_LOOPS_MASK) | |
100 | ||
101 | /* Use old compare/branch support (kept around for awhile for | |
102 | comparison and backoff purposes). */ | |
103 | /* ??? This option is experimental and is not documented. | |
104 | Eventually it will be deleted. */ | |
105 | #define TARGET_OLD_COMPARE_MASK 8 | |
106 | #define TARGET_OLD_COMPARE (target_flags & TARGET_OLD_COMPARE_MASK) | |
107 | ||
108 | /* Macro to define tables used to set the flags. | |
109 | This is a list in braces of pairs in braces, | |
110 | each pair being { "NAME", VALUE } | |
111 | where VALUE is the bits to set or minus the bits to clear. | |
112 | An empty string NAME is used to identify the default VALUE. */ | |
113 | ||
114 | #define TARGET_SWITCHES \ | |
115 | { \ | |
116 | /* { "relax", TARGET_RELAX_MASK }, \ | |
117 | { "no-relax", -TARGET_RELAX_MASK },*/ \ | |
118 | { "debug", TARGET_DEBUG_MASK }, \ | |
119 | { "align-loops", TARGET_ALIGN_LOOPS_MASK }, \ | |
120 | { "no-align-loops", -TARGET_ALIGN_LOOPS_MASK }, \ | |
121 | { "old-compare", TARGET_OLD_COMPARE_MASK }, \ | |
122 | { "no-old-compare", -TARGET_OLD_COMPARE_MASK }, \ | |
123 | SUBTARGET_SWITCHES \ | |
124 | { "", TARGET_DEFAULT } \ | |
125 | } | |
126 | ||
127 | #define TARGET_DEFAULT (0) | |
128 | ||
129 | #define SUBTARGET_SWITCHES | |
130 | ||
131 | /* This macro is similar to `TARGET_SWITCHES' but defines names of | |
132 | command options that have values. Its definition is an | |
133 | initializer with a subgrouping for each command option. | |
134 | ||
135 | Each subgrouping contains a string constant, that defines the | |
136 | fixed part of the option name, and the address of a variable. | |
137 | The variable, type `char *', is set to the variable part of the | |
138 | given option if the fixed part matches. The actual option name | |
139 | is made by appending `-m' to the specified name. | |
140 | ||
141 | Here is an example which defines `-mshort-data-NUMBER'. If the | |
142 | given option is `-mshort-data-512', the variable `m88k_short_data' | |
143 | will be set to the string `"512"'. | |
144 | ||
145 | extern char *m88k_short_data; | |
146 | #define TARGET_OPTIONS { { "short-data-", &m88k_short_data } } */ | |
147 | ||
148 | extern char *m32r_model_string; | |
149 | extern char *m32r_sdata_string; | |
150 | #define TARGET_OPTIONS \ | |
151 | { \ | |
152 | { "model=", &m32r_model_string }, \ | |
153 | { "sdata=", &m32r_sdata_string }, \ | |
154 | } | |
155 | ||
156 | /* Code Models | |
157 | ||
158 | Code models are used to select between two choices of two separate | |
159 | possibilities (address space size, call insn to use): | |
160 | ||
161 | small: addresses use 24 bits, use bl to make calls | |
162 | medium: addresses use 32 bits, use bl to make calls (*1) | |
163 | large: addresses use 32 bits, use seth/add3/jl to make calls (*2) | |
164 | ||
165 | The fourth is "addresses use 24 bits, use seth/add3/jl to make calls" but | |
166 | using this one doesn't make much sense. | |
167 | ||
168 | (*1) The linker may eventually be able to relax seth/add3 -> ld24. | |
169 | (*2) The linker may eventually be able to relax seth/add3/jl -> bl. | |
170 | ||
171 | Internally these are recorded as TARGET_ADDR{24,32} and | |
172 | TARGET_CALL{26,32}. | |
173 | ||
174 | The __model__ attribute can be used to select the code model to use when | |
175 | accessing particular objects. */ | |
176 | ||
177 | enum m32r_model { M32R_MODEL_SMALL, M32R_MODEL_MEDIUM, M32R_MODEL_LARGE }; | |
178 | ||
179 | extern enum m32r_model m32r_model; | |
180 | #define TARGET_MODEL_SMALL (m32r_model == M32R_MODEL_SMALL) | |
181 | #define TARGET_MODEL_MEDIUM (m32r_model == M32R_MODEL_MEDIUM) | |
182 | #define TARGET_MODEL_LARGE (m32r_model == M32R_MODEL_LARGE) | |
183 | #define TARGET_ADDR24 (m32r_model == M32R_MODEL_SMALL) | |
184 | #define TARGET_ADDR32 (! TARGET_ADDR24) | |
185 | #define TARGET_CALL26 (! TARGET_CALL32) | |
186 | #define TARGET_CALL32 (m32r_model == M32R_MODEL_LARGE) | |
187 | ||
188 | /* The default is the small model. */ | |
189 | #define M32R_MODEL_DEFAULT "small" | |
190 | ||
191 | /* Small Data Area | |
192 | ||
193 | The SDA consists of sections .sdata, .sbss, and .scommon. | |
194 | .scommon isn't a real section, symbols in it have their section index | |
195 | set to SHN_M32R_SCOMMON, though support for it exists in the linker script. | |
196 | ||
197 | Two switches control the SDA: | |
198 | ||
199 | -G NNN - specifies the maximum size of variable to go in the SDA | |
200 | ||
201 | -msdata=foo - specifies how such variables are handled | |
202 | ||
203 | -msdata=none - small data area is disabled | |
204 | ||
205 | -msdata=sdata - small data goes in the SDA, special code isn't | |
206 | generated to use it, and special relocs aren't | |
207 | generated | |
208 | ||
209 | -msdata=use - small data goes in the SDA, special code is generated | |
210 | to use the SDA and special relocs are generated | |
211 | ||
212 | The SDA is not multilib'd, it isn't necessary. | |
213 | MULTILIB_EXTRA_OPTS is set in tmake_file to -msdata=sdata so multilib'd | |
214 | libraries have small data in .sdata/SHN_M32R_SCOMMON so programs that use | |
215 | -msdata=use will successfully link with them (references in header files | |
216 | will cause the compiler to emit code that refers to library objects in | |
217 | .data). ??? There can be a problem if the user passes a -G value greater | |
218 | than the default and a library object in a header file is that size. | |
219 | The default is 8 so this should be rare - if it occurs the user | |
220 | is required to rebuild the libraries or use a smaller value for -G. | |
221 | */ | |
222 | ||
223 | /* Maximum size of variables that go in .sdata/.sbss. | |
224 | The -msdata=foo switch also controls how small variables are handled. */ | |
225 | #define SDATA_DEFAULT_SIZE 8 | |
226 | ||
227 | extern int g_switch_value; /* value of the -G xx switch */ | |
228 | extern int g_switch_set; /* whether -G xx was passed. */ | |
229 | ||
230 | enum m32r_sdata { M32R_SDATA_NONE, M32R_SDATA_SDATA, M32R_SDATA_USE }; | |
231 | ||
232 | extern enum m32r_sdata m32r_sdata; | |
233 | #define TARGET_SDATA_NONE (m32r_sdata == M32R_SDATA_NONE) | |
234 | #define TARGET_SDATA_SDATA (m32r_sdata == M32R_SDATA_SDATA) | |
235 | #define TARGET_SDATA_USE (m32r_sdata == M32R_SDATA_USE) | |
236 | ||
237 | /* Default is to disable the SDA | |
238 | [for upward compatibility with previous toolchains]. */ | |
239 | #define M32R_SDATA_DEFAULT "none" | |
240 | ||
241 | /* Define this macro as a C expression for the initializer of an array of | |
242 | string to tell the driver program which options are defaults for this | |
243 | target and thus do not need to be handled specially when using | |
244 | `MULTILIB_OPTIONS'. */ | |
245 | #define MULTILIB_DEFAULTS { "mmodel=small" } | |
246 | ||
247 | /* Sometimes certain combinations of command options do not make | |
248 | sense on a particular target machine. You can define a macro | |
249 | `OVERRIDE_OPTIONS' to take account of this. This macro, if | |
250 | defined, is executed once just after all the command options have | |
251 | been parsed. | |
252 | ||
253 | Don't use this macro to turn on various extra optimizations for | |
254 | `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */ | |
255 | ||
256 | extern void m32r_init (); | |
257 | ||
258 | #define OVERRIDE_OPTIONS \ | |
259 | do { \ | |
260 | /* These need to be done at start up. It's convenient to do them here. */ \ | |
261 | m32r_init (); \ | |
262 | } while (0) | |
263 | ||
264 | /* Define this macro if debugging can be performed even without a | |
265 | frame pointer. If this macro is defined, GNU CC will turn on the | |
266 | `-fomit-frame-pointer' option whenever `-O' is specified. */ | |
267 | #define CAN_DEBUG_WITHOUT_FP | |
268 | \f | |
269 | /* Target machine storage layout. */ | |
270 | ||
271 | /* Define to use software floating point emulator for REAL_ARITHMETIC and | |
272 | decimal <-> binary conversion. */ | |
273 | #define REAL_ARITHMETIC | |
274 | ||
275 | /* Define this if most significant bit is lowest numbered | |
276 | in instructions that operate on numbered bit-fields. */ | |
277 | #define BITS_BIG_ENDIAN 1 | |
278 | ||
279 | /* Define this if most significant byte of a word is the lowest numbered. */ | |
280 | #define BYTES_BIG_ENDIAN 1 | |
281 | ||
282 | /* Define this if most significant word of a multiword number is the lowest | |
283 | numbered. */ | |
284 | #define WORDS_BIG_ENDIAN 1 | |
285 | ||
286 | /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must | |
287 | be a constant value with the same meaning as WORDS_BIG_ENDIAN, | |
288 | which will be used only when compiling libgcc2.c. Typically the | |
289 | value will be set based on preprocessor defines. */ | |
290 | /*#define LIBGCC2_WORDS_BIG_ENDIAN 1*/ | |
291 | ||
292 | /* Number of bits in an addressable storage unit. */ | |
293 | #define BITS_PER_UNIT 8 | |
294 | ||
295 | /* Width in bits of a "word", which is the contents of a machine register. | |
296 | Note that this is not necessarily the width of data type `int'; | |
297 | if using 16-bit ints on a 68000, this would still be 32. | |
298 | But on a machine with 16-bit registers, this would be 16. */ | |
299 | #define BITS_PER_WORD 32 | |
300 | ||
301 | /* Width of a word, in units (bytes). */ | |
302 | #define UNITS_PER_WORD 4 | |
303 | ||
304 | /* Define this macro if it is advisable to hold scalars in registers | |
305 | in a wider mode than that declared by the program. In such cases, | |
306 | the value is constrained to be within the bounds of the declared | |
307 | type, but kept valid in the wider mode. The signedness of the | |
308 | extension may differ from that of the type. */ | |
309 | #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ | |
310 | if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
311 | && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ | |
312 | { \ | |
313 | (MODE) = SImode; \ | |
314 | } | |
315 | ||
316 | /* Define this macro if the promotion described by `PROMOTE_MODE' | |
317 | should also be done for outgoing function arguments. */ | |
318 | /*#define PROMOTE_FUNCTION_ARGS*/ | |
319 | ||
320 | /* Likewise, if the function return value is promoted. | |
321 | If defined, FUNCTION_VALUE must perform the same promotions done by | |
322 | PROMOTE_MODE. */ | |
323 | /*#define PROMOTE_FUNCTION_RETURN*/ | |
324 | ||
325 | /* Width in bits of a pointer. | |
326 | See also the macro `Pmode' defined below. */ | |
327 | #define POINTER_SIZE 32 | |
328 | ||
329 | /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
330 | #define PARM_BOUNDARY 32 | |
331 | ||
332 | /* Boundary (in *bits*) on which stack pointer should be aligned. */ | |
333 | #define STACK_BOUNDARY 32 | |
334 | ||
335 | /* ALIGN FRAMES on word boundaries */ | |
336 | #define M32R_STACK_ALIGN(LOC) (((LOC)+3) & ~3) | |
337 | ||
338 | /* Allocation boundary (in *bits*) for the code of a function. */ | |
339 | #define FUNCTION_BOUNDARY 32 | |
340 | ||
341 | /* Alignment of field after `int : 0' in a structure. */ | |
342 | #define EMPTY_FIELD_BOUNDARY 32 | |
343 | ||
344 | /* Every structure's size must be a multiple of this. */ | |
345 | #define STRUCTURE_SIZE_BOUNDARY 8 | |
346 | ||
347 | /* A bitfield declared as `int' forces `int' alignment for the struct. */ | |
348 | #define PCC_BITFIELD_TYPE_MATTERS 1 | |
349 | ||
350 | /* No data type wants to be aligned rounder than this. */ | |
351 | #define BIGGEST_ALIGNMENT 32 | |
352 | ||
353 | /* The best alignment to use in cases where we have a choice. */ | |
354 | #define FASTEST_ALIGNMENT 32 | |
355 | ||
356 | /* Make strings word-aligned so strcpy from constants will be faster. */ | |
357 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ | |
358 | ((TREE_CODE (EXP) == STRING_CST \ | |
359 | && (ALIGN) < FASTEST_ALIGNMENT) \ | |
360 | ? FASTEST_ALIGNMENT : (ALIGN)) | |
361 | ||
362 | /* Make arrays of chars word-aligned for the same reasons. */ | |
363 | #define DATA_ALIGNMENT(TYPE, ALIGN) \ | |
364 | (TREE_CODE (TYPE) == ARRAY_TYPE \ | |
365 | && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ | |
366 | && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN)) | |
367 | ||
368 | /* Set this nonzero if move instructions will actually fail to work | |
369 | when given unaligned data. */ | |
370 | #define STRICT_ALIGNMENT 1 | |
371 | \f | |
372 | /* Layout of source language data types. */ | |
373 | ||
374 | #define SHORT_TYPE_SIZE 16 | |
375 | #define INT_TYPE_SIZE 32 | |
376 | #define LONG_TYPE_SIZE 32 | |
377 | #define LONG_LONG_TYPE_SIZE 64 | |
378 | #define FLOAT_TYPE_SIZE 32 | |
379 | #define DOUBLE_TYPE_SIZE 64 | |
380 | #define LONG_DOUBLE_TYPE_SIZE 64 | |
381 | ||
382 | /* Define this as 1 if `char' should by default be signed; else as 0. */ | |
383 | #define DEFAULT_SIGNED_CHAR 1 | |
384 | ||
385 | #define SIZE_TYPE "long unsigned int" | |
386 | #define PTRDIFF_TYPE "long int" | |
387 | #define WCHAR_TYPE "short unsigned int" | |
388 | #define WCHAR_TYPE_SIZE 16 | |
389 | ||
390 | /* Define results of standard character escape sequences. */ | |
391 | #define TARGET_BELL 007 | |
392 | #define TARGET_BS 010 | |
393 | #define TARGET_TAB 011 | |
394 | #define TARGET_NEWLINE 012 | |
395 | #define TARGET_VT 013 | |
396 | #define TARGET_FF 014 | |
397 | #define TARGET_CR 015 | |
398 | \f | |
399 | /* Standard register usage. */ | |
400 | ||
401 | /* Number of actual hardware registers. | |
402 | The hardware registers are assigned numbers for the compiler | |
403 | from 0 to just below FIRST_PSEUDO_REGISTER. | |
404 | All registers that the compiler knows about must be given numbers, | |
405 | even those that are not normally considered general registers. */ | |
406 | #define FIRST_PSEUDO_REGISTER 18 | |
407 | ||
408 | /* 1 for registers that have pervasive standard uses | |
409 | and are not available for the register allocator. | |
410 | ||
411 | 0-3 - arguments/results | |
412 | 4-5 - call used [4 is used as a tmp during prologue/epilogue generation] | |
413 | 6 - call used, gptmp | |
414 | 7 - call used, static chain pointer | |
415 | 8-11 - call saved | |
416 | 12 - call saved [reserved for global pointer] | |
417 | 13 - frame pointer | |
418 | 14 - subroutine link register | |
419 | 15 - stack pointer | |
420 | 16 - arg pointer | |
421 | 17 - carry flag | |
422 | ||
423 | By default, the extension registers are not available. */ | |
424 | ||
425 | #define FIXED_REGISTERS \ | |
426 | { 0, 0, 0, 0, 0, 0, 0, 0, \ | |
427 | 0, 0, 0, 0, 0, 0, 0, 1, \ | |
428 | 1, 0 } | |
429 | ||
430 | /* 1 for registers not available across function calls. | |
431 | These must include the FIXED_REGISTERS and also any | |
432 | registers that can be used without being saved. | |
433 | The latter must include the registers where values are returned | |
434 | and the register where structure-value addresses are passed. | |
435 | Aside from that, you can include as many other registers as you like. */ | |
436 | ||
437 | #define CALL_USED_REGISTERS \ | |
438 | { 1, 1, 1, 1, 1, 1, 1, 1, \ | |
439 | 0, 0, 0, 0, 0, 0, 1, 1, \ | |
440 | 1, 1 } | |
441 | ||
442 | /* Zero or more C statements that may conditionally modify two variables | |
443 | `fixed_regs' and `call_used_regs' (both of type `char []') after they | |
444 | have been initialized from the two preceding macros. | |
445 | ||
446 | This is necessary in case the fixed or call-clobbered registers depend | |
447 | on target flags. | |
448 | ||
449 | You need not define this macro if it has no work to do. */ | |
450 | ||
451 | /*#define CONDITIONAL_REGISTER_USAGE*/ | |
452 | ||
453 | /* If defined, an initializer for a vector of integers, containing the | |
454 | numbers of hard registers in the order in which GNU CC should | |
455 | prefer to use them (from most preferred to least). */ | |
9fd54896 | 456 | #if 1 /* better for int code */ |
8c5ca3b9 DE |
457 | #define REG_ALLOC_ORDER \ |
458 | { 4, 5, 6, 7, 2, 3, 8, 9, 10, 11, 12, 13, 14, 0, 1, 15, 16, 17 } | |
9fd54896 | 459 | #else /* better for fp code at expense of int code */ |
8c5ca3b9 DE |
460 | #define REG_ALLOC_ORDER \ |
461 | { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 } | |
462 | #endif | |
463 | ||
464 | /* Return number of consecutive hard regs needed starting at reg REGNO | |
465 | to hold something of mode MODE. | |
466 | This is ordinarily the length in words of a value of mode MODE | |
467 | but can be less for certain modes in special long registers. */ | |
468 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
469 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
470 | ||
471 | /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */ | |
472 | extern unsigned int m32r_hard_regno_mode_ok[]; | |
473 | extern unsigned int m32r_mode_class[]; | |
474 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ | |
475 | ((m32r_hard_regno_mode_ok[REGNO] & m32r_mode_class[MODE]) != 0) | |
476 | ||
477 | /* A C expression that is nonzero if it is desirable to choose | |
478 | register allocation so as to avoid move instructions between a | |
479 | value of mode MODE1 and a value of mode MODE2. | |
480 | ||
481 | If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, | |
482 | MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1, | |
483 | MODE2)' must be zero. */ | |
484 | ||
485 | /* Tie QI/HI/SI modes together. */ | |
486 | #define MODES_TIEABLE_P(MODE1, MODE2) \ | |
487 | (GET_MODE_CLASS (MODE1) == MODE_INT \ | |
488 | && GET_MODE_CLASS (MODE2) == MODE_INT \ | |
489 | && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ | |
490 | && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) | |
491 | \f | |
492 | /* Register classes and constants. */ | |
493 | ||
494 | /* Define the classes of registers for register constraints in the | |
495 | machine description. Also define ranges of constants. | |
496 | ||
497 | One of the classes must always be named ALL_REGS and include all hard regs. | |
498 | If there is more than one class, another class must be named NO_REGS | |
499 | and contain no registers. | |
500 | ||
501 | The name GENERAL_REGS must be the name of a class (or an alias for | |
502 | another name such as ALL_REGS). This is the class of registers | |
503 | that is allowed by "g" or "r" in a register constraint. | |
504 | Also, registers outside this class are allocated only when | |
505 | instructions express preferences for them. | |
506 | ||
507 | The classes must be numbered in nondecreasing order; that is, | |
508 | a larger-numbered class must never be contained completely | |
509 | in a smaller-numbered class. | |
510 | ||
511 | For any two classes, it is very desirable that there be another | |
512 | class that represents their union. | |
513 | ||
514 | It is important that any condition codes have class NO_REGS. | |
515 | See `register_operand'. */ | |
516 | ||
517 | enum reg_class { | |
518 | NO_REGS, CARRY_REG, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES | |
519 | }; | |
520 | ||
521 | #define N_REG_CLASSES (int) LIM_REG_CLASSES | |
522 | ||
523 | /* Give names of register classes as strings for dump file. */ | |
524 | #define REG_CLASS_NAMES \ | |
525 | { "NO_REGS", "CARRY_REG", "GENERAL_REGS", "ALL_REGS" } | |
526 | ||
527 | /* Define which registers fit in which classes. | |
528 | This is an initializer for a vector of HARD_REG_SET | |
529 | of length N_REG_CLASSES. */ | |
530 | ||
531 | #define REG_CLASS_CONTENTS \ | |
532 | { {0}, {0x20000}, {0x1ffff}, {0x3ffff} } | |
533 | ||
534 | /* The same information, inverted: | |
535 | Return the class number of the smallest class containing | |
536 | reg number REGNO. This could be a conditional expression | |
537 | or could index an array. */ | |
538 | extern enum reg_class m32r_regno_reg_class[]; | |
539 | #define REGNO_REG_CLASS(REGNO) \ | |
540 | (m32r_regno_reg_class[REGNO]) | |
541 | ||
542 | /* The class value for index registers, and the one for base regs. */ | |
543 | #define INDEX_REG_CLASS GENERAL_REGS | |
544 | #define BASE_REG_CLASS GENERAL_REGS | |
545 | ||
546 | /* Get reg_class from a letter such as appears in the machine description. */ | |
547 | #define REG_CLASS_FROM_LETTER(C) NO_REGS | |
548 | ||
549 | /* These assume that REGNO is a hard or pseudo reg number. | |
550 | They give nonzero only if REGNO is a hard reg of the suitable class | |
551 | or a pseudo reg currently allocated to a suitable hard reg. | |
552 | Since they use reg_renumber, they are safe only once reg_renumber | |
553 | has been allocated, which happens in local-alloc.c. */ | |
554 | #define REGNO_OK_FOR_BASE_P(REGNO) \ | |
555 | ((REGNO) < FIRST_PSEUDO_REGISTER \ | |
556 | ? GPR_P (REGNO) || (REGNO) == ARG_POINTER_REGNUM \ | |
557 | : GPR_P (reg_renumber[REGNO])) | |
558 | #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO) | |
559 | ||
560 | /* Given an rtx X being reloaded into a reg required to be | |
561 | in class CLASS, return the class of reg to actually use. | |
562 | In general this is just CLASS; but on some machines | |
563 | in some cases it is preferable to use a more restrictive class. */ | |
564 | #define PREFERRED_RELOAD_CLASS(X,CLASS) \ | |
565 | (CLASS) | |
566 | ||
567 | /* Return the maximum number of consecutive registers | |
568 | needed to represent mode MODE in a register of class CLASS. */ | |
569 | #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
570 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
571 | ||
572 | /* The letters I, J, K, L, M, N, O, P in a register constraint string | |
573 | can be used to stand for particular ranges of immediate operands. | |
574 | This macro defines what the ranges are. | |
575 | C is the letter, and VALUE is a constant value. | |
576 | Return 1 if VALUE is in the range specified by C. */ | |
577 | /* 'I' is used for 8 bit signed immediates. | |
578 | 'J' is used for 16 bit signed immediates. | |
579 | 'K' is used for 16 bit unsigned immediates. | |
580 | 'L' is used for 16 bit immediates left shifted by 16 (sign ???). | |
581 | 'M' is used for 24 bit unsigned immediates. | |
582 | 'N' is used for any 32 bit non-symbolic value. | |
583 | 'O' is used for 5 bit unsigned immediates (shift count). | |
584 | 'P' is used for 16 bit signed immediates for compares | |
585 | (values in the range -32767 to +32768). */ | |
586 | ||
587 | /* local to this file */ | |
588 | #define INT8_P(X) ((unsigned) ((X) + 0x80) < 0x100) | |
589 | #define INT16_P(X) ((unsigned) ((X) + 0x8000) < 0x10000) | |
590 | #define CMP_INT16_P(X) ((unsigned) ((X) - 1 + 0x8000) < 0x10000) | |
591 | #define UINT16_P(X) ((unsigned) (X) < 0x10000) | |
4d6c607f | 592 | #define UPPER16_P(X) (((X) & ~0xffff0000) == 0) |
8c5ca3b9 DE |
593 | #define UINT24_P(X) ((unsigned) (X) < 0x1000000) |
594 | #define INT32_P(X) ((X) >= (-(HOST_WIDE_INT) 0x7fffffff - 1) \ | |
595 | && (X) <= (unsigned HOST_WIDE_INT) 0xffffffff) | |
596 | #define UINT5_P(X) ((unsigned) (X) < 32) | |
597 | ||
598 | #define CONST_OK_FOR_LETTER_P(VALUE, C) \ | |
599 | ((C) == 'I' ? INT8_P (VALUE) \ | |
600 | : (C) == 'J' ? INT16_P (VALUE) \ | |
601 | : (C) == 'K' ? UINT16_P (VALUE) \ | |
602 | : (C) == 'L' ? UPPER16_P (VALUE) \ | |
603 | : (C) == 'M' ? UINT24_P (VALUE) \ | |
604 | : (C) == 'N' ? INT32_P (VALUE) \ | |
605 | : (C) == 'O' ? UINT5_P (VALUE) \ | |
606 | : (C) == 'P' ? CMP_INT16_P (VALUE) \ | |
607 | : 0) | |
608 | ||
609 | /* Similar, but for floating constants, and defining letters G and H. | |
610 | Here VALUE is the CONST_DOUBLE rtx itself. | |
611 | For the m32r, handle a few constants inline. | |
612 | ??? We needn't treat DI and DF modes differently, but for now we do. */ | |
613 | #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ | |
614 | ((C) == 'G' ? easy_di_const (VALUE) \ | |
615 | : (C) == 'H' ? easy_df_const (VALUE) \ | |
616 | : 0) | |
617 | ||
618 | /* A C expression that defines the optional machine-dependent constraint | |
619 | letters that can be used to segregate specific types of operands, | |
620 | usually memory references, for the target machine. It should return 1 if | |
621 | VALUE corresponds to the operand type represented by the constraint letter | |
622 | C. If C is not defined as an extra constraint, the value returned should | |
623 | be 0 regardless of VALUE. */ | |
624 | /* Q is for symbolic addresses loadable with ld24. | |
625 | R is for symbolic addresses when ld24 can't be used. */ | |
626 | #define EXTRA_CONSTRAINT(VALUE, C) \ | |
627 | ((C) == 'Q' \ | |
628 | ? ((TARGET_ADDR24 && GET_CODE (VALUE) == LABEL_REF) \ | |
629 | || addr24_operand (VALUE, VOIDmode)) \ | |
630 | : (C) == 'R' \ | |
631 | ? ((TARGET_ADDR32 && GET_CODE (VALUE) == LABEL_REF) \ | |
632 | || addr32_operand (VALUE, VOIDmode)) \ | |
633 | : 0) | |
634 | \f | |
635 | /* Stack layout and stack pointer usage. */ | |
636 | ||
637 | /* Define this macro if pushing a word onto the stack moves the stack | |
638 | pointer to a smaller address. */ | |
639 | #define STACK_GROWS_DOWNWARD | |
640 | ||
641 | /* Define this if the nominal address of the stack frame | |
642 | is at the high-address end of the local variables; | |
643 | that is, each additional local variable allocated | |
644 | goes at a more negative offset from the frame pointer. */ | |
645 | /*#define FRAME_GROWS_DOWNWARD*/ | |
646 | ||
647 | /* Offset from frame pointer to start allocating local variables at. | |
648 | If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
649 | first local allocated. Otherwise, it is the offset to the BEGINNING | |
650 | of the first local allocated. */ | |
651 | /* The frame pointer points at the same place as the stack pointer, except if | |
652 | alloca has been called. */ | |
653 | #define STARTING_FRAME_OFFSET \ | |
654 | M32R_STACK_ALIGN (current_function_outgoing_args_size) | |
655 | ||
656 | /* Offset from the stack pointer register to the first location at which | |
657 | outgoing arguments are placed. */ | |
658 | #define STACK_POINTER_OFFSET 0 | |
659 | ||
660 | /* Offset of first parameter from the argument pointer register value. */ | |
661 | #define FIRST_PARM_OFFSET(FNDECL) 0 | |
662 | ||
663 | /* A C expression whose value is RTL representing the address in a | |
664 | stack frame where the pointer to the caller's frame is stored. | |
665 | Assume that FRAMEADDR is an RTL expression for the address of the | |
666 | stack frame itself. | |
667 | ||
668 | If you don't define this macro, the default is to return the value | |
669 | of FRAMEADDR--that is, the stack frame address is also the address | |
670 | of the stack word that points to the previous frame. */ | |
671 | /*define DYNAMIC_CHAIN_ADDRESS (FRAMEADDR)*/ | |
672 | ||
673 | /* A C expression whose value is RTL representing the value of the | |
674 | return address for the frame COUNT steps up from the current frame. | |
675 | FRAMEADDR is the frame pointer of the COUNT frame, or the frame | |
676 | pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' | |
677 | is defined. */ | |
678 | /* The current return address is in r14. */ | |
679 | #if 0 /* The default value should work. */ | |
680 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
681 | (((COUNT) == -1) \ | |
682 | ? gen_rtx (REG, Pmode, 14) \ | |
683 | : copy_to_reg (gen_rtx (MEM, Pmode, \ | |
684 | memory_address (Pmode, plus_constant ((FRAME), UNITS_PER_WORD))))) | |
685 | #endif | |
686 | ||
687 | /* Register to use for pushing function arguments. */ | |
688 | #define STACK_POINTER_REGNUM 15 | |
689 | ||
690 | /* Base register for access to local variables of the function. */ | |
691 | #define FRAME_POINTER_REGNUM 13 | |
692 | ||
693 | /* Base register for access to arguments of the function. */ | |
694 | #define ARG_POINTER_REGNUM 16 | |
695 | ||
696 | /* The register number of the return address pointer register, which | |
697 | is used to access the current function's return address from the | |
698 | stack. On some machines, the return address is not at a fixed | |
699 | offset from the frame pointer or stack pointer or argument | |
700 | pointer. This register can be defined to point to the return | |
701 | address on the stack, and then be converted by `ELIMINABLE_REGS' | |
702 | into either the frame pointer or stack pointer. | |
703 | ||
704 | Do not define this macro unless there is no other way to get the | |
705 | return address from the stack. */ | |
706 | /* FIXME: revisit */ | |
707 | /* #define RETURN_ADDRESS_POINTER_REGNUM */ | |
708 | ||
709 | /* Register in which static-chain is passed to a function. This must | |
710 | not be a register used by the prologue. */ | |
711 | #define STATIC_CHAIN_REGNUM 7 | |
712 | ||
713 | /* These aren't official macros. */ | |
714 | #define PROLOGUE_TMP_REGNUM 4 | |
715 | #define RETURN_ADDR_REGNUM 14 | |
716 | /* #define GP_REGNUM 12 */ | |
717 | #define CARRY_REGNUM 17 | |
718 | #define M32R_MAX_INT_REGS 16 | |
719 | ||
720 | #define GPR_P(REGNO) ((unsigned) (REGNO) < M32R_MAX_INT_REGS) | |
721 | \f | |
722 | /* Eliminating the frame and arg pointers. */ | |
723 | ||
724 | /* A C expression which is nonzero if a function must have and use a | |
725 | frame pointer. This expression is evaluated in the reload pass. | |
726 | If its value is nonzero the function will have a frame pointer. */ | |
727 | #define FRAME_POINTER_REQUIRED \ | |
728 | (current_function_calls_alloca) | |
729 | ||
730 | #if 0 | |
731 | /* C statement to store the difference between the frame pointer | |
732 | and the stack pointer values immediately after the function prologue. | |
733 | If `ELIMINABLE_REGS' is defined, this macro will be not be used and | |
734 | need not be defined. */ | |
735 | #define INITIAL_FRAME_POINTER_OFFSET(VAR) \ | |
736 | ((VAR) = m32r_compute_frame_size (get_frame_size ())) | |
737 | #endif | |
738 | ||
739 | /* If defined, this macro specifies a table of register pairs used to | |
740 | eliminate unneeded registers that point into the stack frame. If | |
741 | it is not defined, the only elimination attempted by the compiler | |
742 | is to replace references to the frame pointer with references to | |
743 | the stack pointer. | |
744 | ||
745 | Note that the elimination of the argument pointer with the stack | |
746 | pointer is specified first since that is the preferred elimination. */ | |
747 | ||
748 | #define ELIMINABLE_REGS \ | |
749 | {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ | |
750 | { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ | |
751 | { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }} \ | |
752 | ||
753 | /* A C expression that returns non-zero if the compiler is allowed to | |
754 | try to replace register number FROM-REG with register number | |
755 | TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is | |
756 | defined, and will usually be the constant 1, since most of the | |
757 | cases preventing register elimination are things that the compiler | |
758 | already knows about. */ | |
759 | ||
760 | #define CAN_ELIMINATE(FROM, TO) \ | |
761 | ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \ | |
762 | ? ! frame_pointer_needed \ | |
763 | : 1) | |
764 | ||
765 | /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It | |
766 | specifies the initial difference between the specified pair of | |
767 | registers. This macro must be defined if `ELIMINABLE_REGS' is | |
768 | defined. */ | |
769 | ||
770 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
771 | { \ | |
772 | int size = m32r_compute_frame_size (get_frame_size ()); \ | |
773 | \ | |
774 | if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ | |
775 | (OFFSET) = 0; \ | |
776 | else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \ | |
777 | (OFFSET) = size - current_function_pretend_args_size; \ | |
778 | else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ | |
779 | (OFFSET) = size - current_function_pretend_args_size; \ | |
780 | else \ | |
781 | abort (); \ | |
782 | } | |
783 | \f | |
784 | /* Function argument passing. */ | |
785 | ||
786 | /* When a prototype says `char' or `short', really pass an `int'. */ | |
8c5ca3b9 DE |
787 | #define PROMOTE_PROTOTYPES |
788 | ||
789 | /* If defined, the maximum amount of space required for outgoing | |
790 | arguments will be computed and placed into the variable | |
791 | `current_function_outgoing_args_size'. No space will be pushed | |
792 | onto the stack for each call; instead, the function prologue should | |
793 | increase the stack frame size by this amount. */ | |
794 | #define ACCUMULATE_OUTGOING_ARGS | |
795 | ||
796 | /* Define this macro if functions should assume that stack space has | |
797 | been allocated for arguments even when their values are passed in | |
798 | registers. | |
799 | ||
800 | The value of this macro is the size, in bytes, of the area | |
801 | reserved for arguments passed in registers for the function | |
802 | represented by FNDECL. | |
803 | ||
804 | This space can be allocated by the caller, or be a part of the | |
805 | machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says | |
806 | which. */ | |
807 | #if 0 | |
808 | #define REG_PARM_STACK_SPACE(FNDECL) \ | |
809 | (M32R_MAX_PARM_REGS * UNITS_PER_WORD) | |
810 | #endif | |
811 | ||
812 | /* Value is the number of bytes of arguments automatically | |
813 | popped when returning from a subroutine call. | |
814 | FUNDECL is the declaration node of the function (as a tree), | |
815 | FUNTYPE is the data type of the function (as a tree), | |
816 | or for a library call it is an identifier node for the subroutine name. | |
817 | SIZE is the number of bytes of arguments passed on the stack. */ | |
818 | #define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 0 | |
819 | ||
820 | /* Define a data type for recording info about an argument list | |
821 | during the scan of that argument list. This data type should | |
822 | hold all necessary information about the function itself | |
823 | and about the args processed so far, enough to enable macros | |
824 | such as FUNCTION_ARG to determine where the next arg should go. */ | |
825 | #define CUMULATIVE_ARGS int | |
826 | ||
827 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
828 | for a call to a function whose data type is FNTYPE. | |
829 | For a library call, FNTYPE is 0. */ | |
830 | #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT) \ | |
831 | ((CUM) = 0) | |
832 | ||
833 | /* The number of registers used for parameter passing. Local to this file. */ | |
834 | #define M32R_MAX_PARM_REGS 4 | |
835 | ||
836 | /* 1 if N is a possible register number for function argument passing. */ | |
837 | #define FUNCTION_ARG_REGNO_P(N) \ | |
838 | ((unsigned) (N) < M32R_MAX_PARM_REGS) | |
839 | ||
840 | /* The ROUND_ADVANCE* macros are local to this file. */ | |
841 | /* Round SIZE up to a word boundary. */ | |
842 | #define ROUND_ADVANCE(SIZE) \ | |
843 | (((SIZE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
844 | ||
845 | /* Round arg MODE/TYPE up to the next word boundary. */ | |
846 | #define ROUND_ADVANCE_ARG(MODE, TYPE) \ | |
847 | ((MODE) == BLKmode \ | |
848 | ? ROUND_ADVANCE (int_size_in_bytes (TYPE)) \ | |
849 | : ROUND_ADVANCE (GET_MODE_SIZE (MODE))) | |
850 | ||
851 | /* Round CUM up to the necessary point for argument MODE/TYPE. */ | |
852 | #if 0 | |
853 | #define ROUND_ADVANCE_CUM(CUM, MODE, TYPE) \ | |
854 | ((((MODE) == BLKmode ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) \ | |
855 | > BITS_PER_WORD) \ | |
856 | ? ((CUM) + 1 & ~1) \ | |
857 | : (CUM)) | |
858 | #else | |
859 | #define ROUND_ADVANCE_CUM(CUM, MODE, TYPE) (CUM) | |
860 | #endif | |
861 | ||
862 | /* Return boolean indicating arg of type TYPE and mode MODE will be passed in | |
863 | a reg. This includes arguments that have to be passed by reference as the | |
864 | pointer to them is passed in a reg if one is available (and that is what | |
865 | we're given). | |
866 | This macro is only used in this file. */ | |
867 | #define PASS_IN_REG_P(CUM, MODE, TYPE, NAMED) \ | |
868 | (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) < M32R_MAX_PARM_REGS) | |
869 | ||
870 | /* Determine where to put an argument to a function. | |
871 | Value is zero to push the argument on the stack, | |
872 | or a hard register in which to store the argument. | |
873 | ||
874 | MODE is the argument's machine mode. | |
875 | TYPE is the data type of the argument (as a tree). | |
876 | This is null for libcalls where that information may | |
877 | not be available. | |
878 | CUM is a variable of type CUMULATIVE_ARGS which gives info about | |
879 | the preceding args and about the function being called. | |
880 | NAMED is nonzero if this argument is a named parameter | |
881 | (otherwise it is an extra parameter matching an ellipsis). */ | |
882 | /* On the M32R the first M32R_MAX_PARM_REGS args are normally in registers | |
883 | and the rest are pushed. */ | |
884 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
885 | (PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED)) \ | |
886 | ? gen_rtx (REG, (MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \ | |
887 | : 0) | |
888 | ||
889 | /* FIXME: Quick hack to try to get varargs working the normal way. */ | |
890 | #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ | |
891 | (((! current_function_varargs || (NAMED)) \ | |
892 | && PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED))) \ | |
893 | ? gen_rtx (REG, (MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \ | |
894 | : 0) | |
895 | ||
896 | /* A C expression for the number of words, at the beginning of an | |
897 | argument, must be put in registers. The value must be zero for | |
898 | arguments that are passed entirely in registers or that are entirely | |
899 | pushed on the stack. | |
900 | ||
901 | On some machines, certain arguments must be passed partially in | |
902 | registers and partially in memory. On these machines, typically the | |
903 | first @var{n} words of arguments are passed in registers, and the rest | |
904 | on the stack. If a multi-word argument (a @code{double} or a | |
905 | structure) crosses that boundary, its first few words must be passed | |
906 | in registers and the rest must be pushed. This macro tells the | |
907 | compiler when this occurs, and how many of the words should go in | |
908 | registers. */ | |
909 | #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ | |
910 | function_arg_partial_nregs (&CUM, MODE, TYPE, NAMED) | |
911 | ||
912 | /* A C expression that indicates when an argument must be passed by | |
913 | reference. If nonzero for an argument, a copy of that argument is | |
914 | made in memory and a pointer to the argument is passed instead of | |
915 | the argument itself. The pointer is passed in whatever way is | |
916 | appropriate for passing a pointer to that type. */ | |
917 | /* All arguments greater than 8 bytes are passed this way. */ | |
918 | #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \ | |
919 | ((TYPE) && int_size_in_bytes (TYPE) > 8) | |
920 | ||
921 | /* Update the data in CUM to advance over an argument | |
922 | of mode MODE and data type TYPE. | |
923 | (TYPE is null for libcalls where that information may not be available.) */ | |
924 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
925 | ((CUM) = (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) \ | |
926 | + ROUND_ADVANCE_ARG ((MODE), (TYPE)))) | |
927 | ||
928 | /* If defined, a C expression that gives the alignment boundary, in bits, | |
929 | of an argument with the specified mode and type. If it is not defined, | |
930 | PARM_BOUNDARY is used for all arguments. */ | |
931 | #if 0 | |
932 | /* We assume PARM_BOUNDARY == UNITS_PER_WORD here. */ | |
933 | #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ | |
934 | (((TYPE) ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) <= PARM_BOUNDARY \ | |
935 | ? PARM_BOUNDARY \ | |
936 | : 2 * PARM_BOUNDARY) | |
937 | #endif | |
938 | ||
939 | #if 0 | |
940 | /* If defined, is a C expression that produces the machine-specific | |
941 | code for a call to `__builtin_saveregs'. This code will be moved | |
942 | to the very beginning of the function, before any parameter access | |
943 | are made. The return value of this function should be an RTX that | |
944 | contains the value to use as the return of `__builtin_saveregs'. | |
945 | ||
946 | The argument ARGS is a `tree_list' containing the arguments that | |
947 | were passed to `__builtin_saveregs'. | |
948 | ||
949 | If this macro is not defined, the compiler will output an ordinary | |
950 | call to the library function `__builtin_saveregs'. */ | |
951 | extern struct rtx *m32r_expand_builtin_savergs (); | |
952 | #define EXPAND_BUILTIN_SAVEREGS(ARGS) m32r_expand_builtin_saveregs (ARGS) | |
953 | #endif | |
954 | ||
955 | /* This macro offers an alternative | |
956 | to using `__builtin_saveregs' and defining the macro | |
957 | `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register | |
958 | arguments into the stack so that all the arguments appear to have | |
959 | been passed consecutively on the stack. Once this is done, you | |
960 | can use the standard implementation of varargs that works for | |
961 | machines that pass all their arguments on the stack. | |
962 | ||
963 | The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, | |
964 | containing the values that obtain after processing of the named | |
965 | arguments. The arguments MODE and TYPE describe the last named | |
966 | argument--its machine mode and its data type as a tree node. | |
967 | ||
968 | The macro implementation should do two things: first, push onto the | |
969 | stack all the argument registers *not* used for the named | |
970 | arguments, and second, store the size of the data thus pushed into | |
971 | the `int'-valued variable whose name is supplied as the argument | |
972 | PRETEND_SIZE. The value that you store here will serve as | |
973 | additional offset for setting up the stack frame. | |
974 | ||
975 | If the argument NO_RTL is nonzero, it means that the | |
976 | arguments of the function are being analyzed for the second time. | |
977 | This happens for an inline function, which is not actually | |
978 | compiled until the end of the source file. The macro | |
979 | `SETUP_INCOMING_VARARGS' should not generate any instructions in | |
980 | this case. */ | |
981 | ||
982 | #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_SIZE, NO_RTL) \ | |
983 | m32r_setup_incoming_varargs (&ARGS_SO_FAR, MODE, TYPE, &PRETEND_SIZE, NO_RTL) | |
984 | \f | |
985 | /* Function results. */ | |
986 | ||
987 | /* Define how to find the value returned by a function. | |
988 | VALTYPE is the data type of the value (as a tree). | |
989 | If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
990 | otherwise, FUNC is 0. */ | |
991 | #define FUNCTION_VALUE(VALTYPE, FUNC) gen_rtx (REG, TYPE_MODE (VALTYPE), 0) | |
992 | ||
993 | /* Define how to find the value returned by a library function | |
994 | assuming the value has mode MODE. */ | |
995 | #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, 0) | |
996 | ||
997 | /* 1 if N is a possible register number for a function value | |
998 | as seen by the caller. */ | |
999 | /* ??? What about r1 in DI/DF values. */ | |
1000 | #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) | |
1001 | ||
1002 | /* A C expression which can inhibit the returning of certain function | |
1003 | values in registers, based on the type of value. A nonzero value says | |
1004 | to return the function value in memory, just as large structures are | |
1005 | always returned. Here TYPE will be a C expression of type `tree', | |
1006 | representing the data type of the value. */ | |
1007 | #define RETURN_IN_MEMORY(TYPE) \ | |
1008 | (int_size_in_bytes (TYPE) > 8) | |
1009 | ||
1010 | /* Tell GCC to use RETURN_IN_MEMORY. */ | |
1011 | #define DEFAULT_PCC_STRUCT_RETURN 0 | |
1012 | ||
1013 | /* Register in which address to store a structure value | |
1014 | is passed to a function, or 0 to use `invisible' first argument. */ | |
1015 | #define STRUCT_VALUE 0 | |
1016 | \f | |
1017 | /* Function entry and exit. */ | |
1018 | ||
1019 | /* Initialize data used by insn expanders. This is called from | |
1020 | init_emit, once for each function, before code is generated. */ | |
1021 | #define INIT_EXPANDERS m32r_init_expanders () | |
1022 | ||
1023 | /* This macro generates the assembly code for function entry. | |
1024 | FILE is a stdio stream to output the code to. | |
1025 | SIZE is an int: how many units of temporary storage to allocate. | |
1026 | Refer to the array `regs_ever_live' to determine which registers | |
1027 | to save; `regs_ever_live[I]' is nonzero if register number I | |
1028 | is ever used in the function. This macro is responsible for | |
1029 | knowing which registers should not be saved even if used. */ | |
1030 | #define FUNCTION_PROLOGUE(FILE, SIZE) \ | |
1031 | m32r_output_function_prologue (FILE, SIZE) | |
1032 | ||
1033 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, | |
1034 | the stack pointer does not matter. The value is tested only in | |
1035 | functions that have frame pointers. | |
1036 | No definition is equivalent to always zero. */ | |
1037 | #define EXIT_IGNORE_STACK 1 | |
1038 | ||
1039 | /* This macro generates the assembly code for function exit, | |
1040 | on machines that need it. If FUNCTION_EPILOGUE is not defined | |
1041 | then individual return instructions are generated for each | |
1042 | return statement. Args are same as for FUNCTION_PROLOGUE. | |
1043 | ||
1044 | The function epilogue should not depend on the current stack pointer! | |
1045 | It should use the frame pointer only. This is mandatory because | |
1046 | of alloca; we also take advantage of it to omit stack adjustments | |
1047 | before returning. */ | |
1048 | #define FUNCTION_EPILOGUE(FILE, SIZE) \ | |
1049 | m32r_output_function_epilogue (FILE, SIZE) | |
1050 | ||
1051 | /* Output assembler code to FILE to increment profiler label # LABELNO | |
1052 | for profiling a function entry. */ | |
1053 | #define FUNCTION_PROFILER(FILE, LABELNO) | |
1054 | \f | |
1055 | /* Trampolines. */ | |
1056 | ||
1057 | /* On the M32R, the trampoline is | |
1058 | ||
1059 | ld24 r7,STATIC | |
1060 | ld24 r6,FUNCTION | |
1061 | jmp r6 | |
1062 | nop | |
1063 | ||
1064 | FIXME: Need addr32 support. | |
1065 | */ | |
1066 | ||
1067 | /* Length in bytes of the trampoline for entering a nested function. */ | |
1068 | #define TRAMPOLINE_SIZE 12 | |
1069 | ||
1070 | /* Emit RTL insns to initialize the variable parts of a trampoline. | |
1071 | FNADDR is an RTX for the address of the function's pure code. | |
1072 | CXT is an RTX for the static chain value for the function. */ | |
1073 | #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ | |
1074 | do { \ | |
1075 | emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 0)), \ | |
1076 | plus_constant ((CXT), 0xe7000000)); \ | |
1077 | emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 4)), \ | |
1078 | plus_constant ((FNADDR), 0xe6000000)); \ | |
1079 | emit_move_insn (gen_rtx (MEM, SImode, plus_constant (TRAMP, 8)), \ | |
1080 | GEN_INT (0x1fc67000)); \ | |
1081 | emit_insn (gen_flush_icache (validize_mem (gen_rtx (MEM, SImode, TRAMP)))); \ | |
1082 | } while (0) | |
1083 | \f | |
1084 | /* Library calls. */ | |
1085 | ||
1086 | /* Generate calls to memcpy, memcmp and memset. */ | |
1087 | #define TARGET_MEM_FUNCTIONS | |
1088 | \f | |
1089 | /* Addressing modes, and classification of registers for them. */ | |
1090 | ||
1091 | /* Maximum number of registers that can appear in a valid memory address. */ | |
1092 | #define MAX_REGS_PER_ADDRESS 1 | |
1093 | ||
1094 | /* We have post-inc load and pre-dec,pre-inc store, | |
1095 | but only for 4 byte vals. */ | |
1096 | #if 0 | |
1097 | #define HAVE_PRE_DECREMENT | |
1098 | #define HAVE_PRE_INCREMENT | |
1099 | #define HAVE_POST_INCREMENT | |
1100 | #endif | |
1101 | ||
1102 | /* Recognize any constant value that is a valid address. */ | |
1103 | #define CONSTANT_ADDRESS_P(X) \ | |
1104 | (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ | |
1105 | || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST) | |
1106 | ||
1107 | /* Nonzero if the constant value X is a legitimate general operand. | |
1108 | We don't allow (plus symbol large-constant) as the relocations can't | |
1109 | describe it. INTVAL > 32767 handles both 16 bit and 24 bit relocations. | |
1110 | We allow all CONST_DOUBLE's as the md file patterns will force the | |
1111 | constant to memory if they can't handle them. */ | |
1112 | ||
1113 | #define LEGITIMATE_CONSTANT_P(X) \ | |
1114 | (! (GET_CODE (X) == CONST \ | |
1115 | && GET_CODE (XEXP (X, 0)) == PLUS \ | |
1116 | && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \ | |
1117 | && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \ | |
1118 | && (unsigned HOST_WIDE_INT) INTVAL (XEXP (XEXP (X, 0), 1)) > 32767)) | |
1119 | ||
1120 | /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
1121 | and check its validity for a certain class. | |
1122 | We have two alternate definitions for each of them. | |
1123 | The usual definition accepts all pseudo regs; the other rejects | |
1124 | them unless they have been allocated suitable hard regs. | |
1125 | The symbol REG_OK_STRICT causes the latter definition to be used. | |
1126 | ||
1127 | Most source files want to accept pseudo regs in the hope that | |
1128 | they will get allocated to the class that the insn wants them to be in. | |
1129 | Source files for reload pass need to be strict. | |
1130 | After reload, it makes no difference, since pseudo regs have | |
1131 | been eliminated by then. */ | |
1132 | ||
1133 | #ifdef REG_OK_STRICT | |
1134 | ||
1135 | /* Nonzero if X is a hard reg that can be used as a base reg. */ | |
1136 | #define REG_OK_FOR_BASE_P(X) GPR_P (REGNO (X)) | |
1137 | /* Nonzero if X is a hard reg that can be used as an index. */ | |
1138 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) | |
1139 | ||
1140 | #else | |
1141 | ||
1142 | /* Nonzero if X is a hard reg that can be used as a base reg | |
1143 | or if it is a pseudo reg. */ | |
1144 | #define REG_OK_FOR_BASE_P(X) \ | |
1145 | (GPR_P (REGNO (X)) \ | |
1146 | || (REGNO (X)) == ARG_POINTER_REGNUM \ | |
1147 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) | |
1148 | /* Nonzero if X is a hard reg that can be used as an index | |
1149 | or if it is a pseudo reg. */ | |
1150 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) | |
1151 | ||
1152 | #endif | |
1153 | ||
1154 | /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression | |
1155 | that is a valid memory address for an instruction. | |
1156 | The MODE argument is the machine mode for the MEM expression | |
1157 | that wants to use this address. */ | |
1158 | ||
1159 | /* local to this file */ | |
1160 | #define RTX_OK_FOR_BASE_P(X) \ | |
1161 | (REG_P (X) && REG_OK_FOR_BASE_P (X)) | |
1162 | ||
1163 | /* local to this file */ | |
1164 | #define RTX_OK_FOR_OFFSET_P(X) \ | |
1165 | (GET_CODE (X) == CONST_INT && INT16_P (INTVAL (X))) | |
1166 | ||
1167 | /* local to this file */ | |
1168 | #define LEGITIMATE_OFFSET_ADDRESS_P(MODE, X) \ | |
1169 | (GET_CODE (X) == PLUS \ | |
1170 | && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \ | |
1171 | && RTX_OK_FOR_OFFSET_P (XEXP (X, 1))) | |
1172 | ||
1173 | /* local to this file */ | |
1174 | #define LEGITIMATE_LO_SUM_ADDRESS_P(MODE, X) \ | |
1175 | (GET_CODE (X) == LO_SUM \ | |
1176 | && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \ | |
1177 | && CONSTANT_P (XEXP (X, 1))) | |
1178 | ||
1179 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ | |
1180 | { if (RTX_OK_FOR_BASE_P (X)) \ | |
1181 | goto ADDR; \ | |
1182 | if (LEGITIMATE_OFFSET_ADDRESS_P ((MODE), (X))) \ | |
1183 | goto ADDR; \ | |
1184 | if (LEGITIMATE_LO_SUM_ADDRESS_P ((MODE), (X))) \ | |
1185 | goto ADDR; \ | |
1186 | } | |
1187 | ||
1188 | /* Try machine-dependent ways of modifying an illegitimate address | |
1189 | to be legitimate. If we find one, return the new, valid address. | |
1190 | This macro is used in only one place: `memory_address' in explow.c. | |
1191 | ||
1192 | OLDX is the address as it was before break_out_memory_refs was called. | |
1193 | In some cases it is useful to look at this to decide what needs to be done. | |
1194 | ||
1195 | MODE and WIN are passed so that this macro can use | |
1196 | GO_IF_LEGITIMATE_ADDRESS. | |
1197 | ||
1198 | It is always safe for this macro to do nothing. It exists to recognize | |
1199 | opportunities to optimize the output. | |
1200 | ||
1201 | ??? Is there anything useful we can do here for the M32R? */ | |
1202 | ||
1203 | #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) | |
1204 | ||
1205 | /* Go to LABEL if ADDR (a legitimate address expression) | |
1206 | has an effect that depends on the machine mode it is used for. */ | |
1207 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \ | |
1208 | do { \ | |
1209 | if (GET_CODE (ADDR) == PRE_DEC) \ | |
1210 | goto LABEL; \ | |
1211 | if (GET_CODE (ADDR) == PRE_INC) \ | |
1212 | goto LABEL; \ | |
1213 | if (GET_CODE (ADDR) == POST_INC) \ | |
1214 | goto LABEL; \ | |
1215 | } while (0) | |
1216 | \f | |
1217 | /* Condition code usage. */ | |
1218 | ||
1219 | /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, | |
1220 | return the mode to be used for the comparison. */ | |
1221 | extern enum machine_mode m32r_select_cc_mode (); | |
1222 | #define SELECT_CC_MODE(OP, X, Y) \ | |
1223 | m32r_select_cc_mode (OP, X, Y) | |
1224 | ||
1225 | /* Return non-zero if SELECT_CC_MODE will never return MODE for a | |
1226 | floating point inequality comparison. */ | |
1227 | #define REVERSIBLE_CC_MODE(MODE) 1 /*FIXME*/ | |
1228 | \f | |
1229 | /* Costs. */ | |
1230 | ||
1231 | /* ??? I'm quite sure I don't understand enough of the subtleties involved | |
1232 | in choosing the right numbers to use here, but there doesn't seem to be | |
1233 | enough documentation on this. What I've done is define an insn to cost | |
1234 | 4 "units" and work from there. COSTS_N_INSNS (N) is defined as (N) * 4 - 2 | |
1235 | so that seems reasonable. Some values are supposed to be defined relative | |
1236 | to each other and thus aren't necessarily related to COSTS_N_INSNS. */ | |
1237 | ||
1238 | /* Compute the cost of computing a constant rtl expression RTX | |
1239 | whose rtx-code is CODE. The body of this macro is a portion | |
1240 | of a switch statement. If the code is computed here, | |
1241 | return it with a return statement. Otherwise, break from the switch. */ | |
1242 | /* Small integers are as cheap as registers. 4 byte values can be fetched | |
1243 | as immediate constants - let's give that the cost of an extra insn. */ | |
1244 | #define CONST_COSTS(X, CODE, OUTER_CODE) \ | |
1245 | case CONST_INT : \ | |
1246 | if (INT16_P (INTVAL (X))) \ | |
1247 | return 0; \ | |
1248 | /* fall through */ \ | |
1249 | case CONST : \ | |
1250 | case LABEL_REF : \ | |
1251 | case SYMBOL_REF : \ | |
1252 | return 4; \ | |
1253 | case CONST_DOUBLE : \ | |
1254 | { \ | |
1255 | rtx high, low; \ | |
1256 | split_double (X, &high, &low); \ | |
1257 | return 4 * (!INT16_P (INTVAL (high)) \ | |
1258 | + !INT16_P (INTVAL (low))); \ | |
1259 | } | |
1260 | ||
1261 | /* Compute the cost of an address. */ | |
1262 | #define ADDRESS_COST(ADDR) m32r_address_cost (ADDR) | |
1263 | ||
1264 | /* Compute extra cost of moving data between one register class | |
1265 | and another. */ | |
1266 | #define REGISTER_MOVE_COST(CLASS1, CLASS2) 2 | |
1267 | ||
1268 | /* Compute the cost of moving data between registers and memory. */ | |
1269 | /* Memory is 3 times as expensive as registers. | |
1270 | ??? Is that the right way to look at it? */ | |
1271 | #define MEMORY_MOVE_COST(MODE) \ | |
1272 | (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD ? 6 : 12) | |
1273 | ||
1274 | /* The cost of a branch insn. */ | |
1275 | /* A value of 2 here causes GCC to avoid using branches in comparisons like | |
1276 | while (a < N && a). Branches aren't that expensive on the M32R so | |
1277 | we define this as 1. Defining it as 2 had a heavy hit in fp-bit.c. */ | |
1278 | #define BRANCH_COST 1 | |
1279 | ||
1280 | /* Provide the costs of a rtl expression. This is in the body of a | |
1281 | switch on CODE. The purpose for the cost of MULT is to encourage | |
1282 | `synth_mult' to find a synthetic multiply when reasonable. | |
1283 | ||
1284 | If we need more than 12 insns to do a multiply, then go out-of-line, | |
1285 | since the call overhead will be < 10% of the cost of the multiply. */ | |
1286 | #define RTX_COSTS(X, CODE, OUTER_CODE) \ | |
1287 | case MULT : \ | |
1288 | return COSTS_N_INSNS (3); \ | |
1289 | case DIV : \ | |
1290 | case UDIV : \ | |
1291 | case MOD : \ | |
1292 | case UMOD : \ | |
1293 | return COSTS_N_INSNS (10); \ | |
1294 | ||
1295 | /* Nonzero if access to memory by bytes is slow and undesirable. | |
1296 | For RISC chips, it means that access to memory by bytes is no | |
1297 | better than access by words when possible, so grab a whole word | |
1298 | and maybe make use of that. */ | |
1299 | #define SLOW_BYTE_ACCESS 1 | |
1300 | ||
1301 | /* Define this macro if it is as good or better to call a constant | |
1302 | function address than to call an address kept in a register. */ | |
8c5ca3b9 DE |
1303 | #define NO_FUNCTION_CSE |
1304 | ||
1305 | /* Define this macro if it is as good or better for a function to call | |
1306 | itself with an explicit address than to call an address kept in a | |
1307 | register. */ | |
8c5ca3b9 DE |
1308 | #define NO_RECURSIVE_FUNCTION_CSE |
1309 | ||
1310 | /* Enable the register move pass. | |
1311 | This is useful for machines with only 2 address instructions. | |
1312 | It's not currently enabled by default because on the stanford benchmarks | |
1313 | the improvement wasn't significant and in a couple of cases caused a | |
1314 | significant de-optimization. */ | |
1315 | /* #define ENABLE_REGMOVE_PASS */ | |
1316 | \f | |
1317 | /* Section selection. */ | |
1318 | ||
1319 | #define TEXT_SECTION_ASM_OP "\t.section .text" | |
1320 | #define DATA_SECTION_ASM_OP "\t.section .data" | |
1321 | #define RODATA_SECTION_ASM_OP "\t.section .rodata" | |
1322 | #define BSS_SECTION_ASM_OP "\t.section .bss" | |
1323 | #define SDATA_SECTION_ASM_OP "\t.section .sdata" | |
1324 | #define SBSS_SECTION_ASM_OP "\t.section .sbss" | |
1325 | /* This one is for svr4.h. */ | |
1326 | #undef CONST_SECTION_ASM_OP | |
1327 | #define CONST_SECTION_ASM_OP "\t.section .rodata" | |
1328 | ||
1329 | /* A list of names for sections other than the standard two, which are | |
1330 | `in_text' and `in_data'. You need not define this macro | |
1331 | on a system with no other sections (that GCC needs to use). */ | |
1332 | #undef EXTRA_SECTIONS | |
1333 | #define EXTRA_SECTIONS in_sdata, in_sbss, in_const, in_ctors, in_dtors | |
1334 | ||
1335 | /* One or more functions to be defined in "varasm.c". These | |
1336 | functions should do jobs analogous to those of `text_section' and | |
1337 | `data_section', for your additional sections. Do not define this | |
1338 | macro if you do not define `EXTRA_SECTIONS'. */ | |
1339 | #undef EXTRA_SECTION_FUNCTIONS | |
1340 | #define EXTRA_SECTION_FUNCTIONS \ | |
1341 | CONST_SECTION_FUNCTION \ | |
1342 | CTORS_SECTION_FUNCTION \ | |
1343 | DTORS_SECTION_FUNCTION \ | |
1344 | SDATA_SECTION_FUNCTION \ | |
1345 | SBSS_SECTION_FUNCTION | |
1346 | ||
1347 | #define SDATA_SECTION_FUNCTION \ | |
1348 | void \ | |
1349 | sdata_section () \ | |
1350 | { \ | |
1351 | if (in_section != in_sdata) \ | |
1352 | { \ | |
1353 | fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \ | |
1354 | in_section = in_sdata; \ | |
1355 | } \ | |
1356 | } \ | |
1357 | ||
1358 | #define SBSS_SECTION_FUNCTION \ | |
1359 | void \ | |
1360 | sbss_section () \ | |
1361 | { \ | |
1362 | if (in_section != in_sbss) \ | |
1363 | { \ | |
1364 | fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \ | |
1365 | in_section = in_sbss; \ | |
1366 | } \ | |
1367 | } \ | |
1368 | ||
1369 | /* A C statement or statements to switch to the appropriate section for | |
1370 | output of EXP. You can assume that EXP is either a `VAR_DECL' node | |
1371 | or a constant of some sort. RELOC indicates whether the initial value | |
1372 | of EXP requires link-time relocations. */ | |
1373 | extern void m32r_select_section (); | |
1374 | #undef SELECT_SECTION | |
1375 | #define SELECT_SECTION(EXP, RELOC) m32r_select_section ((EXP), (RELOC)) | |
1376 | ||
1377 | /* A C statement or statements to switch to the appropriate section for | |
1378 | output of RTX in mode MODE. You can assume that RTX | |
1379 | is some kind of constant in RTL. The argument MODE is redundant | |
1380 | except in the case of a `const_int' rtx. Select the section by | |
1381 | calling `text_section' or one of the alternatives for other | |
1382 | sections. | |
1383 | ||
1384 | Do not define this macro if you put all constants in the read-only | |
1385 | data section. */ | |
1386 | ||
1387 | #undef SELECT_RTX_SECTION | |
1388 | ||
1389 | /* Define this macro if jump tables (for tablejump insns) should be | |
1390 | output in the text section, along with the assembler instructions. | |
1391 | Otherwise, the readonly data section is used. | |
1392 | This macro is irrelevant if there is no separate readonly data section. */ | |
1393 | /*#define JUMP_TABLES_IN_TEXT_SECTION*/ | |
1394 | ||
1395 | /* Define this macro if references to a symbol must be treated | |
1396 | differently depending on something about the variable or | |
1397 | function named by the symbol (such as what section it is in). | |
1398 | ||
1399 | The macro definition, if any, is executed immediately after the | |
1400 | rtl for DECL or other node is created. | |
1401 | The value of the rtl will be a `mem' whose address is a | |
1402 | `symbol_ref'. | |
1403 | ||
1404 | The usual thing for this macro to do is to store a flag in the | |
1405 | `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified | |
1406 | name string in the `symbol_ref' (if one bit is not enough | |
1407 | information). */ | |
1408 | ||
1409 | #define SDATA_FLAG_CHAR '@' | |
1410 | /* Small objects are recorded with no prefix for space efficiency since | |
1411 | they'll be the most common. This isn't the case if the user passes | |
1412 | -mmodel={medium|large} and one could choose to not mark symbols that | |
1413 | are the default, but that complicates things. */ | |
1414 | /*#define SMALL_FLAG_CHAR '#'*/ | |
1415 | #define MEDIUM_FLAG_CHAR '%' | |
1416 | #define LARGE_FLAG_CHAR '&' | |
1417 | ||
1418 | #define SDATA_NAME_P(NAME) (*(NAME) == SDATA_FLAG_CHAR) | |
1419 | /*#define SMALL_NAME_P(NAME) (*(NAME) == SMALL_FLAG_CHAR)*/ | |
0ebaa85d | 1420 | #define SMALL_NAME_P(NAME) (! ENCODED_NAME_P (NAME) && ! LIT_NAME_P (NAME)) |
8c5ca3b9 DE |
1421 | #define MEDIUM_NAME_P(NAME) (*(NAME) == MEDIUM_FLAG_CHAR) |
1422 | #define LARGE_NAME_P(NAME) (*(NAME) == LARGE_FLAG_CHAR) | |
0ebaa85d DE |
1423 | /* For string literals, etc. */ |
1424 | #define LIT_NAME_P(NAME) ((NAME)[0] == '*' && (NAME)[1] == '.') | |
8c5ca3b9 DE |
1425 | |
1426 | #define ENCODED_NAME_P(SYMBOL_NAME) \ | |
1427 | (SDATA_NAME_P (SYMBOL_NAME) \ | |
1428 | /*|| SMALL_NAME_P (SYMBOL_NAME)*/ \ | |
1429 | || MEDIUM_NAME_P (SYMBOL_NAME) \ | |
1430 | || LARGE_NAME_P (SYMBOL_NAME)) | |
1431 | ||
1432 | extern void m32r_encode_section_info (); | |
1433 | #define ENCODE_SECTION_INFO(DECL) m32r_encode_section_info (DECL) | |
1434 | ||
1435 | /* Decode SYM_NAME and store the real name part in VAR, sans | |
1436 | the characters that encode section info. Define this macro if | |
1437 | ENCODE_SECTION_INFO alters the symbol's name string. */ | |
0ebaa85d | 1438 | /* Note that we have to handle symbols like "%*start". */ |
8c5ca3b9 DE |
1439 | #define STRIP_NAME_ENCODING(VAR, SYMBOL_NAME) \ |
1440 | do { \ | |
1441 | (VAR) = (SYMBOL_NAME) + ENCODED_NAME_P (SYMBOL_NAME); \ | |
1442 | (VAR) += *(VAR) == '*'; \ | |
1443 | } while (0) | |
1444 | \f | |
1445 | /* PIC */ | |
1446 | ||
1447 | /* The register number of the register used to address a table of static | |
1448 | data addresses in memory. In some cases this register is defined by a | |
1449 | processor's ``application binary interface'' (ABI). When this macro | |
1450 | is defined, RTL is generated for this register once, as with the stack | |
1451 | pointer and frame pointer registers. If this macro is not defined, it | |
1452 | is up to the machine-dependent files to allocate such a register (if | |
1453 | necessary). */ | |
1454 | /*#define PIC_OFFSET_TABLE_REGNUM 12*/ | |
1455 | ||
1456 | /* Define this macro if the register defined by PIC_OFFSET_TABLE_REGNUM is | |
1457 | clobbered by calls. Do not define this macro if PIC_OFFSET_TABLE_REGNUM | |
1458 | is not defined. */ | |
1459 | /* This register is call-saved on the M32R. */ | |
1460 | /*#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED*/ | |
1461 | ||
1462 | /* By generating position-independent code, when two different programs (A | |
1463 | and B) share a common library (libC.a), the text of the library can be | |
1464 | shared whether or not the library is linked at the same address for both | |
1465 | programs. In some of these environments, position-independent code | |
1466 | requires not only the use of different addressing modes, but also | |
1467 | special code to enable the use of these addressing modes. | |
1468 | ||
1469 | The FINALIZE_PIC macro serves as a hook to emit these special | |
1470 | codes once the function is being compiled into assembly code, but not | |
1471 | before. (It is not done before, because in the case of compiling an | |
1472 | inline function, it would lead to multiple PIC prologues being | |
1473 | included in functions which used inline functions and were compiled to | |
1474 | assembly language.) */ | |
1475 | ||
1476 | /*#define FINALIZE_PIC m32r_finalize_pic ()*/ | |
1477 | ||
1478 | /* A C expression that is nonzero if X is a legitimate immediate | |
1479 | operand on the target machine when generating position independent code. | |
1480 | You can assume that X satisfies CONSTANT_P, so you need not | |
1481 | check this. You can also assume `flag_pic' is true, so you need not | |
1482 | check it either. You need not define this macro if all constants | |
1483 | (including SYMBOL_REF) can be immediate operands when generating | |
1484 | position independent code. */ | |
1485 | /*#define LEGITIMATE_PIC_OPERAND_P(X)*/ | |
1486 | \f | |
1487 | /* Control the assembler format that we output. */ | |
1488 | ||
1489 | /* Output at beginning of assembler file. */ | |
1490 | extern void m32r_asm_file_start (); | |
1491 | #define ASM_FILE_START(FILE) m32r_asm_file_start (FILE) | |
1492 | ||
1493 | /* A C string constant describing how to begin a comment in the target | |
1494 | assembler language. The compiler assumes that the comment will | |
1495 | end at the end of the line. */ | |
1496 | #define ASM_COMMENT_START ";" | |
1497 | ||
1498 | /* Output to assembler file text saying following lines | |
1499 | may contain character constants, extra white space, comments, etc. */ | |
1500 | #define ASM_APP_ON "" | |
1501 | ||
1502 | /* Output to assembler file text saying following lines | |
1503 | no longer contain unusual constructs. */ | |
1504 | #define ASM_APP_OFF "" | |
1505 | ||
1506 | /* This is how to output an assembler line defining a `char' constant. */ | |
1507 | #define ASM_OUTPUT_CHAR(FILE, VALUE) \ | |
1508 | do { \ | |
1509 | fprintf (FILE, "\t.byte\t"); \ | |
1510 | output_addr_const (FILE, (VALUE)); \ | |
1511 | fprintf (FILE, "\n"); \ | |
1512 | } while (0) | |
1513 | ||
1514 | /* This is how to output an assembler line defining a `short' constant. */ | |
1515 | #define ASM_OUTPUT_SHORT(FILE, VALUE) \ | |
1516 | do { \ | |
1517 | fprintf (FILE, "\t.hword\t"); \ | |
1518 | output_addr_const (FILE, (VALUE)); \ | |
1519 | fprintf (FILE, "\n"); \ | |
1520 | } while (0) | |
1521 | ||
1522 | /* This is how to output an assembler line defining an `int' constant. | |
1523 | We also handle symbol output here. */ | |
1524 | #define ASM_OUTPUT_INT(FILE, VALUE) \ | |
1525 | do { \ | |
1526 | fprintf (FILE, "\t.word\t"); \ | |
1527 | output_addr_const (FILE, (VALUE)); \ | |
1528 | fprintf (FILE, "\n"); \ | |
1529 | } while (0) | |
1530 | ||
1531 | /* This is how to output an assembler line defining a `float' constant. */ | |
1532 | #define ASM_OUTPUT_FLOAT(FILE, VALUE) \ | |
1533 | do { \ | |
1534 | long t; \ | |
1535 | char str[30]; \ | |
1536 | REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \ | |
1537 | REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \ | |
1538 | fprintf (FILE, "\t.word\t0x%lx %s %s\n", \ | |
1539 | t, ASM_COMMENT_START, str); \ | |
1540 | } while (0) | |
1541 | ||
1542 | /* This is how to output an assembler line defining a `double' constant. */ | |
1543 | #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \ | |
1544 | do { \ | |
1545 | long t[2]; \ | |
1546 | char str[30]; \ | |
1547 | REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \ | |
1548 | REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \ | |
1549 | fprintf (FILE, "\t.word\t0x%lx %s %s\n\t.word\t0x%lx\n", \ | |
1550 | t[0], ASM_COMMENT_START, str, t[1]); \ | |
1551 | } while (0) | |
1552 | ||
1553 | /* This is how to output an assembler line for a numeric constant byte. */ | |
1554 | #define ASM_OUTPUT_BYTE(FILE, VALUE) \ | |
1555 | fprintf (FILE, "\t%s\t0x%x\n", ASM_BYTE_OP, (VALUE)) | |
1556 | ||
1557 | /* The assembler's parentheses characters. */ | |
1558 | #define ASM_OPEN_PAREN "(" | |
1559 | #define ASM_CLOSE_PAREN ")" | |
1560 | ||
1561 | /* This is how to output the definition of a user-level label named NAME, | |
1562 | such as the label on a static function or variable NAME. */ | |
1563 | /* On the M32R we need to ensure the next instruction starts on a 32 bit | |
1564 | boundary [the previous insn must either be 2 16 bit insns or 1 32 bit]. */ | |
1565 | #define ASM_OUTPUT_LABEL(FILE, NAME) \ | |
1566 | do { \ | |
1567 | assemble_name (FILE, NAME); \ | |
1568 | fputs (":\n", FILE); \ | |
1569 | } while (0) | |
1570 | ||
1571 | /* This is how to output a command to make the user-level label named NAME | |
1572 | defined for reference from other files. */ | |
1573 | #define ASM_GLOBALIZE_LABEL(FILE, NAME) \ | |
1574 | do { \ | |
1575 | fputs ("\t.global\t", FILE); \ | |
1576 | assemble_name (FILE, NAME); \ | |
1577 | fputs ("\n", FILE); \ | |
1578 | } while (0) | |
1579 | ||
1580 | /* This is how to output a reference to a user-level label named NAME. | |
1581 | `assemble_name' uses this. */ | |
1582 | #undef ASM_OUTPUT_LABELREF | |
1583 | #define ASM_OUTPUT_LABELREF(FILE, NAME) \ | |
1584 | do { \ | |
1585 | char *real_name; \ | |
1586 | STRIP_NAME_ENCODING (real_name, (NAME)); \ | |
1587 | fprintf (FILE, "%s%s", USER_LABEL_PREFIX, real_name); \ | |
1588 | } while (0) | |
1589 | ||
1590 | /* Store in OUTPUT a string (made with alloca) containing | |
1591 | an assembler-name for a local static variable named NAME. | |
1592 | LABELNO is an integer which is different for each call. */ | |
1593 | #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ | |
1594 | do { \ | |
1595 | (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10); \ | |
1596 | sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)); \ | |
1597 | } while (0) | |
1598 | ||
1599 | /* How to refer to registers in assembler output. | |
1600 | This sequence is indexed by compiler's hard-register-number (see above). */ | |
1601 | #define REGISTER_NAMES \ | |
1602 | { \ | |
1603 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
1604 | "r8", "r9", "r10", "r11", "r12", "fp", "lr", "sp", \ | |
1605 | "ap", "cbit" \ | |
1606 | } | |
1607 | ||
1608 | /* If defined, a C initializer for an array of structures containing | |
1609 | a name and a register number. This macro defines additional names | |
1610 | for hard registers, thus allowing the `asm' option in declarations | |
1611 | to refer to registers using alternate names. */ | |
1612 | #define ADDITIONAL_REGISTER_NAMES \ | |
1613 | { \ | |
1614 | /*{ "gp", GP_REGNUM },*/ \ | |
1615 | { "r13", FRAME_POINTER_REGNUM }, \ | |
1616 | { "r14", RETURN_ADDR_REGNUM }, \ | |
1617 | { "r15", STACK_POINTER_REGNUM }, \ | |
1618 | } | |
1619 | ||
1620 | /* A C expression which evaluates to true if CODE is a valid | |
1621 | punctuation character for use in the `PRINT_OPERAND' macro. */ | |
1622 | extern char m32r_punct_chars[]; | |
1623 | #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ | |
1624 | m32r_punct_chars[(unsigned char) (CHAR)] | |
1625 | ||
1626 | /* Print operand X (an rtx) in assembler syntax to file FILE. | |
1627 | CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. | |
1628 | For `%' followed by punctuation, CODE is the punctuation and X is null. */ | |
1629 | #define PRINT_OPERAND(FILE, X, CODE) \ | |
1630 | m32r_print_operand (FILE, X, CODE) | |
1631 | ||
1632 | /* A C compound statement to output to stdio stream STREAM the | |
1633 | assembler syntax for an instruction operand that is a memory | |
1634 | reference whose address is ADDR. ADDR is an RTL expression. | |
1635 | ||
1636 | On some machines, the syntax for a symbolic address depends on | |
1637 | the section that the address refers to. On these machines, | |
1638 | define the macro `ENCODE_SECTION_INFO' to store the information | |
1639 | into the `symbol_ref', and then check for it here. */ | |
1640 | #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
1641 | m32r_print_operand_address (FILE, ADDR) | |
1642 | ||
1643 | /* If defined, C string expressions to be used for the `%R', `%L', | |
1644 | `%U', and `%I' options of `asm_fprintf' (see `final.c'). These | |
1645 | are useful when a single `md' file must support multiple assembler | |
1646 | formats. In that case, the various `tm.h' files can define these | |
1647 | macros differently. */ | |
1648 | #define REGISTER_PREFIX "" | |
1649 | #define LOCAL_LABEL_PREFIX ".L" | |
1650 | #define USER_LABEL_PREFIX "" | |
1651 | #define IMMEDIATE_PREFIX "#" | |
1652 | ||
1653 | /* This is how to output an element of a case-vector that is absolute. */ | |
1654 | #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ | |
1655 | do { \ | |
1656 | char label[30]; \ | |
1657 | ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ | |
1658 | fprintf (FILE, "\t.word\t"); \ | |
1659 | assemble_name (FILE, label); \ | |
1660 | fprintf (FILE, "\n"); \ | |
1661 | } while (0) | |
1662 | ||
1663 | /* This is how to output an element of a case-vector that is relative. */ | |
1664 | #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \ | |
1665 | do { \ | |
1666 | char label[30]; \ | |
1667 | ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ | |
1668 | fprintf (FILE, "\t.word\t"); \ | |
1669 | assemble_name (FILE, label); \ | |
1670 | fprintf (FILE, "-"); \ | |
1671 | ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ | |
1672 | assemble_name (FILE, label); \ | |
1673 | fprintf (FILE, ")\n"); \ | |
1674 | } while (0) | |
1675 | ||
1676 | /* A C expression to output text to align the location counter in the way | |
1677 | that is desirable at the beginning of a loop. */ | |
1678 | /* On the M32R, align loops to 32 byte boundaries (cache line size) | |
1679 | if -malign-loops. */ | |
1680 | #define ASM_OUTPUT_LOOP_ALIGN(FILE) \ | |
1681 | do { if (TARGET_ALIGN_LOOPS) ASM_OUTPUT_ALIGN (FILE, 5); } while (0) | |
1682 | ||
1683 | /* This is how to output an assembler line | |
1684 | that says to advance the location counter | |
1685 | to a multiple of 2**LOG bytes. */ | |
1686 | /* .balign is used to avoid confusion. */ | |
1687 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ | |
1688 | do { if ((LOG) != 0) fprintf (FILE, "\t.balign %d\n", 1 << (LOG)); } while (0) | |
1689 | ||
1690 | /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a | |
1691 | separate, explicit argument. If you define this macro, it is used in | |
1692 | place of `ASM_OUTPUT_COMMON', and gives you more flexibility in | |
1693 | handling the required alignment of the variable. The alignment is | |
1694 | specified as the number of bits. */ | |
1695 | ||
1696 | #define SCOMMON_ASM_OP ".scomm" | |
1697 | ||
1698 | #undef ASM_OUTPUT_ALIGNED_COMMON | |
1699 | #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ | |
1700 | do { \ | |
0ebaa85d DE |
1701 | if (! TARGET_SDATA_NONE \ |
1702 | && (SIZE) > 0 && (SIZE) <= g_switch_value) \ | |
8c5ca3b9 DE |
1703 | fprintf ((FILE), "\t%s\t", SCOMMON_ASM_OP); \ |
1704 | else \ | |
1705 | fprintf ((FILE), "\t%s\t", COMMON_ASM_OP); \ | |
1706 | assemble_name ((FILE), (NAME)); \ | |
1707 | fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \ | |
1708 | } while (0) | |
1709 | ||
1710 | #if 0 /* not needed, delete later */ | |
1711 | /* Like `ASM_OUTPUT_LOCAL' except takes the required alignment as a | |
1712 | separate, explicit argument. If you define this macro, it is used in | |
1713 | place of `ASM_OUTPUT_LOCAL', and gives you more flexibility in | |
1714 | handling the required alignment of the variable. The alignment is | |
1715 | specified as the number of bits. */ | |
1716 | ||
1717 | extern void sbss_section (); | |
1718 | ||
1719 | #undef ASM_OUTPUT_ALIGNED_LOCAL | |
1720 | #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ | |
1721 | do { \ | |
1722 | if ((SIZE) > 0 && (SIZE) <= g_switch_value) \ | |
1723 | { \ | |
1724 | sbss_section (); \ | |
1725 | ASM_OUTPUT_ALIGN (FILE, exact_log2 (ALIGN / BITS_PER_UNIT)); \ | |
1726 | ASM_OUTPUT_LABEL (FILE, NAME); \ | |
1727 | ASM_OUTPUT_SKIP (FILE, SIZE); \ | |
1728 | if (!flag_inhibit_size_directive) \ | |
1729 | { \ | |
1730 | fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ | |
1731 | assemble_name (FILE, NAME); \ | |
1732 | fprintf (FILE, ",%d\n", SIZE); \ | |
1733 | } \ | |
1734 | } \ | |
1735 | else \ | |
1736 | { \ | |
1737 | /* This is copied from svr4.h. */ \ | |
1738 | fprintf ((FILE), "\t%s\t", LOCAL_ASM_OP); \ | |
1739 | assemble_name ((FILE), (NAME)); \ | |
1740 | fprintf ((FILE), "\n"); \ | |
1741 | ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \ | |
1742 | } \ | |
1743 | } while (0) | |
1744 | #endif | |
1745 | ||
1746 | /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a | |
1747 | separate, explicit argument. If you define this macro, it is used in | |
1748 | place of `ASM_OUTPUT_BSS', and gives you more flexibility in | |
1749 | handling the required alignment of the variable. The alignment is | |
1750 | specified as the number of bits. | |
1751 | ||
1752 | For the M32R we need sbss support. */ | |
1753 | ||
1754 | #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ | |
1755 | do { \ | |
1756 | ASM_GLOBALIZE_LABEL (FILE, NAME); \ | |
1757 | ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \ | |
1758 | } while (0) | |
1759 | \f | |
1760 | /* Debugging information. */ | |
1761 | ||
1762 | /* Generate DBX and DWARF debugging information. */ | |
1763 | #define DBX_DEBUGGING_INFO | |
1764 | #define DWARF_DEBUGGING_INFO | |
1765 | ||
1766 | /* Prefer STABS (for now). */ | |
1767 | #undef PREFERRED_DEBUGGING_TYPE | |
1768 | #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG | |
1769 | ||
1770 | /* How to renumber registers for dbx and gdb. */ | |
1771 | #define DBX_REGISTER_NUMBER(REGNO) (REGNO) | |
1772 | ||
1773 | /* Turn off splitting of long stabs. */ | |
1774 | #define DBX_CONTIN_LENGTH 0 | |
1775 | \f | |
1776 | /* Miscellaneous. */ | |
1777 | ||
1778 | /* Specify the machine mode that this machine uses | |
1779 | for the index in the tablejump instruction. */ | |
1780 | #define CASE_VECTOR_MODE Pmode | |
1781 | ||
1782 | /* Define this if the tablejump instruction expects the table | |
1783 | to contain offsets from the address of the table. | |
1784 | Do not define this if the table should contain absolute addresses. */ | |
1785 | /* It's not clear what PIC will look like or whether we want to use -fpic | |
1786 | for the embedded form currently being talked about. For now require -fpic | |
1787 | to get pc relative switch tables. */ | |
1788 | /*#define CASE_VECTOR_PC_RELATIVE*/ | |
1789 | ||
1790 | /* Define if operations between registers always perform the operation | |
1791 | on the full register even if a narrower mode is specified. */ | |
1792 | #define WORD_REGISTER_OPERATIONS | |
1793 | ||
1794 | /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD | |
1795 | will either zero-extend or sign-extend. The value of this macro should | |
1796 | be the code that says which one of the two operations is implicitly | |
1797 | done, NIL if none. */ | |
1798 | #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND | |
1799 | ||
1800 | /* Specify the tree operation to be used to convert reals to integers. */ | |
1801 | #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR | |
1802 | ||
1803 | /* This is the kind of divide that is easiest to do in the general case. */ | |
1804 | #define EASY_DIV_EXPR TRUNC_DIV_EXPR | |
1805 | ||
1806 | /* Max number of bytes we can move from memory to memory | |
1807 | in one reasonably fast instruction. */ | |
1808 | #define MOVE_MAX 4 | |
1809 | ||
1810 | /* Define this to be nonzero if shift instructions ignore all but the low-order | |
1811 | few bits. */ | |
1812 | #define SHIFT_COUNT_TRUNCATED 1 | |
1813 | ||
1814 | /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
1815 | is done just by pretending it is already truncated. */ | |
1816 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
1817 | ||
1818 | /* We assume that the store-condition-codes instructions store 0 for false | |
1819 | and some other value for true. This is the value stored for true. */ | |
1820 | #define STORE_FLAG_VALUE 1 | |
1821 | ||
1822 | /* Specify the machine mode that pointers have. | |
1823 | After generation of rtl, the compiler makes no further distinction | |
1824 | between pointers and any other objects of this machine mode. */ | |
1825 | /* ??? The M32R doesn't have full 32 bit pointers, but making this PSImode has | |
1826 | it's own problems (you have to add extendpsisi2 and truncsipsi2). | |
1827 | Try to avoid it. */ | |
1828 | #define Pmode SImode | |
1829 | ||
1830 | /* A function address in a call instruction. */ | |
1831 | #define FUNCTION_MODE SImode | |
1832 | ||
1833 | /* A C expression whose value is nonzero if IDENTIFIER with arguments ARGS | |
1834 | is a valid machine specific attribute for DECL. | |
1835 | The attributes in ATTRIBUTES have previously been assigned to TYPE. */ | |
1836 | extern int m32r_valid_machine_attribute (); | |
1837 | #define VALID_MACHINE_DECL_ATTRIBUTE(DECL, ATTRIBUTES, IDENTIFIER, ARGS) \ | |
1838 | m32r_valid_machine_decl_attribute (DECL, ATTRIBUTES, IDENTIFIER, ARGS) | |
1839 | ||
1840 | /* A C expression that returns zero if the attributes on TYPE1 and TYPE2 are | |
1841 | incompatible, one if they are compatible, and two if they are | |
1842 | nearly compatible (which causes a warning to be generated). */ | |
1843 | extern int m32r_comp_type_attributes (); | |
1844 | #define COMP_TYPE_ATTRIBUTES(TYPE1, TYPE2) \ | |
1845 | m32r_comp_type_attributes (TYPE1, TYPE2) | |
1846 | ||
1847 | /* Give newly defined TYPE some default attributes. */ | |
1848 | extern void m32r_set_default_type_attributes (); | |
1849 | #define SET_DEFAULT_TYPE_ATTRIBUTES(TYPE) \ | |
1850 | m32r_set_default_type_attributes (TYPE) | |
1851 | \f | |
1852 | /* Define the information needed to generate branch and scc insns. This is | |
1853 | stored from the compare operation. Note that we can't use "rtx" here | |
1854 | since it hasn't been defined! */ | |
1855 | extern struct rtx_def *m32r_compare_op0, *m32r_compare_op1; | |
1856 | ||
1857 | /* Define the function that build the compare insn for scc and bcc. */ | |
1858 | extern struct rtx_def *gen_compare (); | |
1859 | ||
1860 | /* M32R function types. */ | |
1861 | enum m32r_function_type { | |
1862 | M32R_FUNCTION_UNKNOWN, M32R_FUNCTION_NORMAL, M32R_FUNCTION_INTERRUPT | |
1863 | }; | |
1864 | #define M32R_INTERRUPT_P(TYPE) \ | |
1865 | ((TYPE) == M32R_FUNCTION_INTERRUPT) | |
1866 | /* Compute the type of a function from its DECL. */ | |
1867 | enum m32r_function_type m32r_compute_function_type (); |