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18543a22 | 1 | /* Definitions of target machine for GNU compiler, Mitsubishi M32R cpu. |
cf011243 AO |
2 | Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 |
3 | Free Software Foundation, Inc. | |
8c5ca3b9 DE |
4 | |
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | /* Things to do: | |
23 | - longlong.h? | |
24 | */ | |
25 | ||
8c5ca3b9 DE |
26 | #undef SWITCH_TAKES_ARG |
27 | #undef WORD_SWITCH_TAKES_ARG | |
28 | #undef HANDLE_SYSV_PRAGMA | |
29 | #undef SIZE_TYPE | |
30 | #undef PTRDIFF_TYPE | |
31 | #undef WCHAR_TYPE | |
32 | #undef WCHAR_TYPE_SIZE | |
33 | #undef ASM_FILE_START | |
34 | #undef ASM_OUTPUT_EXTERNAL_LIBCALL | |
56e2e762 NC |
35 | #undef TARGET_VERSION |
36 | #undef CPP_SPEC | |
37 | #undef ASM_SPEC | |
38 | #undef LINK_SPEC | |
39 | #undef STARTFILE_SPEC | |
40 | #undef ENDFILE_SPEC | |
41 | #undef SUBTARGET_SWITCHES | |
8c5ca3b9 DE |
42 | \f |
43 | /* Print subsidiary information on the compiler version in use. */ | |
56e2e762 | 44 | #ifndef TARGET_VERSION |
8c5ca3b9 | 45 | #define TARGET_VERSION fprintf (stderr, " (m32r)") |
56e2e762 | 46 | #endif |
2b7972b0 | 47 | |
8c5ca3b9 DE |
48 | /* Switch Recognition by gcc.c. Add -G xx support */ |
49 | ||
56e2e762 | 50 | #undef SWITCH_TAKES_ARG |
8c5ca3b9 DE |
51 | #define SWITCH_TAKES_ARG(CHAR) \ |
52 | (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G') | |
53 | ||
54 | /* Names to predefine in the preprocessor for this target machine. */ | |
55 | /* __M32R__ is defined by the existing compiler so we use that. */ | |
2b57e919 | 56 | #define CPP_PREDEFINES "-Acpu=m32r -Amachine=m32r -D__M32R__" |
8c5ca3b9 | 57 | |
56e2e762 NC |
58 | /* This macro defines names of additional specifications to put in the specs |
59 | that can be used in various specifications like CC1_SPEC. Its definition | |
60 | is an initializer with a subgrouping for each command option. | |
8c5ca3b9 | 61 | |
56e2e762 NC |
62 | Each subgrouping contains a string constant, that defines the |
63 | specification name, and a string constant that used by the GNU CC driver | |
64 | program. | |
8c5ca3b9 | 65 | |
56e2e762 | 66 | Do not define this macro if it does not need to do anything. */ |
2b7972b0 | 67 | |
56e2e762 NC |
68 | #ifndef SUBTARGET_EXTRA_SPECS |
69 | #define SUBTARGET_EXTRA_SPECS | |
8c5ca3b9 DE |
70 | #endif |
71 | ||
56e2e762 NC |
72 | #ifndef ASM_CPU_SPEC |
73 | #define ASM_CPU_SPEC "" | |
74 | #endif | |
8c5ca3b9 | 75 | |
56e2e762 NC |
76 | #ifndef CPP_CPU_SPEC |
77 | #define CPP_CPU_SPEC "" | |
78 | #endif | |
79 | ||
80 | #ifndef CC1_CPU_SPEC | |
81 | #define CC1_CPU_SPEC "" | |
82 | #endif | |
83 | ||
84 | #ifndef LINK_CPU_SPEC | |
85 | #define LINK_CPU_SPEC "" | |
86 | #endif | |
87 | ||
88 | #ifndef STARTFILE_CPU_SPEC | |
89 | #define STARTFILE_CPU_SPEC "%{!shared:crt0.o%s} crtinit.o%s" | |
90 | #endif | |
91 | ||
92 | #ifndef ENDFILE_CPU_SPEC | |
93 | #define ENDFILE_CPU_SPEC "-lgloss crtfini.o%s" | |
94 | #endif | |
95 | ||
96 | #ifndef RELAX_SPEC | |
8c5ca3b9 | 97 | #if 0 /* not supported yet */ |
56e2e762 | 98 | #define RELAX_SPEC "%{mrelax:-relax}" |
8c5ca3b9 | 99 | #else |
56e2e762 NC |
100 | #define RELAX_SPEC "" |
101 | #endif | |
8c5ca3b9 DE |
102 | #endif |
103 | ||
56e2e762 NC |
104 | #define EXTRA_SPECS \ |
105 | { "asm_cpu", ASM_CPU_SPEC }, \ | |
106 | { "cpp_cpu", CPP_CPU_SPEC }, \ | |
107 | { "cc1_cpu", CC1_CPU_SPEC }, \ | |
108 | { "link_cpu", LINK_CPU_SPEC }, \ | |
109 | { "startfile_cpu", STARTFILE_CPU_SPEC }, \ | |
110 | { "endfile_cpu", ENDFILE_CPU_SPEC }, \ | |
111 | { "relax", RELAX_SPEC }, \ | |
112 | SUBTARGET_EXTRA_SPECS | |
8c5ca3b9 | 113 | |
56e2e762 | 114 | #define CC1_SPEC "%{G*} %(cc1_cpu)" |
2b7972b0 | 115 | |
56e2e762 NC |
116 | /* Options to pass on to the assembler. */ |
117 | #undef ASM_SPEC | |
118 | #define ASM_SPEC "%{v} %(asm_cpu) %(relax)" | |
119 | ||
120 | #undef ASM_FINAL_SPEC | |
121 | ||
122 | #define LINK_SPEC "%{v} %(link_cpu) %(relax)" | |
123 | ||
124 | #undef STARTFILE_SPEC | |
125 | #define STARTFILE_SPEC "%(startfile_cpu)" | |
126 | ||
127 | #undef ENDFILE_SPEC | |
128 | #define ENDFILE_SPEC "%(endfile_cpu)" | |
8c5ca3b9 DE |
129 | |
130 | #undef LIB_SPEC | |
131 | \f | |
132 | /* Run-time compilation parameters selecting different hardware subsets. */ | |
133 | ||
134 | extern int target_flags; | |
135 | ||
136 | /* If non-zero, tell the linker to do relaxing. | |
137 | We don't do anything with the option, other than recognize it. | |
138 | LINK_SPEC handles passing -relax to the linker. | |
139 | This can cause incorrect debugging information as line numbers may | |
140 | turn out wrong. This shouldn't be specified unless accompanied with -O2 | |
141 | [where the user expects debugging information to be less accurate]. */ | |
56e2e762 | 142 | #define TARGET_RELAX_MASK (1 << 0) |
8c5ca3b9 DE |
143 | |
144 | /* For miscellaneous debugging purposes. */ | |
56e2e762 NC |
145 | #define TARGET_DEBUG_MASK (1 << 1) |
146 | #define TARGET_DEBUG (target_flags & TARGET_DEBUG_MASK) | |
8c5ca3b9 DE |
147 | |
148 | /* Align loops to 32 byte boundaries (cache line size). */ | |
149 | /* ??? This option is experimental and is not documented. */ | |
56e2e762 NC |
150 | #define TARGET_ALIGN_LOOPS_MASK (1 << 2) |
151 | #define TARGET_ALIGN_LOOPS (target_flags & TARGET_ALIGN_LOOPS_MASK) | |
8c5ca3b9 | 152 | |
56e2e762 | 153 | /* Change issue rate. */ |
c237e94a ZW |
154 | #define TARGET_LOW_ISSUE_RATE_MASK (1 << 3) |
155 | #define TARGET_LOW_ISSUE_RATE (target_flags & TARGET_LOW_ISSUE_RATE_MASK) | |
8c5ca3b9 | 156 | |
56e2e762 NC |
157 | /* Change branch cost */ |
158 | #define TARGET_BRANCH_COST_MASK (1 << 4) | |
159 | #define TARGET_BRANCH_COST (target_flags & TARGET_BRANCH_COST_MASK) | |
2b7972b0 | 160 | |
56e2e762 NC |
161 | /* Target machine to compile for. */ |
162 | #define TARGET_M32R 1 | |
2b7972b0 | 163 | |
8c5ca3b9 DE |
164 | /* Macro to define tables used to set the flags. |
165 | This is a list in braces of pairs in braces, | |
166 | each pair being { "NAME", VALUE } | |
167 | where VALUE is the bits to set or minus the bits to clear. | |
168 | An empty string NAME is used to identify the default VALUE. */ | |
169 | ||
56e2e762 | 170 | #ifndef SUBTARGET_SWITCHES |
8c5ca3b9 | 171 | #define SUBTARGET_SWITCHES |
56e2e762 | 172 | #endif |
8c5ca3b9 | 173 | |
56e2e762 NC |
174 | #ifndef TARGET_DEFAULT |
175 | #define TARGET_DEFAULT 0 | |
176 | #endif | |
8c5ca3b9 | 177 | |
56e2e762 NC |
178 | #define TARGET_SWITCHES \ |
179 | { \ | |
180 | /* { "relax", TARGET_RELAX_MASK, "" }, \ | |
181 | { "no-relax", -TARGET_RELAX_MASK, "" },*/ \ | |
182 | { "debug", TARGET_DEBUG_MASK, \ | |
047142d3 | 183 | N_("Display compile time statistics") }, \ |
56e2e762 | 184 | { "align-loops", TARGET_ALIGN_LOOPS_MASK, \ |
047142d3 | 185 | N_("Align all loops to 32 byte boundary") }, \ |
56e2e762 | 186 | { "no-align-loops", -TARGET_ALIGN_LOOPS_MASK, "" }, \ |
c237e94a | 187 | { "issue-rate=1", TARGET_LOW_ISSUE_RATE_MASK, \ |
047142d3 | 188 | N_("Only issue one instruction per cycle") }, \ |
c237e94a | 189 | { "issue-rate=2", -TARGET_LOW_ISSUE_RATE_MASK, "" }, \ |
56e2e762 | 190 | { "branch-cost=1", TARGET_BRANCH_COST_MASK, \ |
047142d3 | 191 | N_("Prefer branches over conditional execution") }, \ |
56e2e762 NC |
192 | { "branch-cost=2", -TARGET_BRANCH_COST_MASK, "" }, \ |
193 | SUBTARGET_SWITCHES \ | |
194 | { "", TARGET_DEFAULT, "" } \ | |
195 | } | |
8c5ca3b9 | 196 | |
56e2e762 NC |
197 | extern const char * m32r_model_string; |
198 | extern const char * m32r_sdata_string; | |
2b7972b0 | 199 | |
56e2e762 NC |
200 | #ifndef SUBTARGET_OPTIONS |
201 | #define SUBTARGET_OPTIONS | |
202 | #endif | |
2b7972b0 | 203 | |
56e2e762 NC |
204 | #define TARGET_OPTIONS \ |
205 | { \ | |
047142d3 PT |
206 | { "model=", & m32r_model_string, \ |
207 | N_("Code size: small, medium or large") }, \ | |
208 | { "sdata=", & m32r_sdata_string, \ | |
209 | N_("Small data area: none, sdata, use") } \ | |
56e2e762 | 210 | SUBTARGET_OPTIONS \ |
8c5ca3b9 DE |
211 | } |
212 | ||
213 | /* Code Models | |
214 | ||
215 | Code models are used to select between two choices of two separate | |
216 | possibilities (address space size, call insn to use): | |
217 | ||
218 | small: addresses use 24 bits, use bl to make calls | |
219 | medium: addresses use 32 bits, use bl to make calls (*1) | |
220 | large: addresses use 32 bits, use seth/add3/jl to make calls (*2) | |
221 | ||
222 | The fourth is "addresses use 24 bits, use seth/add3/jl to make calls" but | |
223 | using this one doesn't make much sense. | |
224 | ||
225 | (*1) The linker may eventually be able to relax seth/add3 -> ld24. | |
226 | (*2) The linker may eventually be able to relax seth/add3/jl -> bl. | |
227 | ||
228 | Internally these are recorded as TARGET_ADDR{24,32} and | |
229 | TARGET_CALL{26,32}. | |
230 | ||
231 | The __model__ attribute can be used to select the code model to use when | |
232 | accessing particular objects. */ | |
233 | ||
234 | enum m32r_model { M32R_MODEL_SMALL, M32R_MODEL_MEDIUM, M32R_MODEL_LARGE }; | |
235 | ||
236 | extern enum m32r_model m32r_model; | |
237 | #define TARGET_MODEL_SMALL (m32r_model == M32R_MODEL_SMALL) | |
238 | #define TARGET_MODEL_MEDIUM (m32r_model == M32R_MODEL_MEDIUM) | |
239 | #define TARGET_MODEL_LARGE (m32r_model == M32R_MODEL_LARGE) | |
240 | #define TARGET_ADDR24 (m32r_model == M32R_MODEL_SMALL) | |
241 | #define TARGET_ADDR32 (! TARGET_ADDR24) | |
242 | #define TARGET_CALL26 (! TARGET_CALL32) | |
243 | #define TARGET_CALL32 (m32r_model == M32R_MODEL_LARGE) | |
244 | ||
245 | /* The default is the small model. */ | |
56e2e762 | 246 | #ifndef M32R_MODEL_DEFAULT |
8c5ca3b9 | 247 | #define M32R_MODEL_DEFAULT "small" |
56e2e762 | 248 | #endif |
8c5ca3b9 DE |
249 | |
250 | /* Small Data Area | |
251 | ||
252 | The SDA consists of sections .sdata, .sbss, and .scommon. | |
253 | .scommon isn't a real section, symbols in it have their section index | |
254 | set to SHN_M32R_SCOMMON, though support for it exists in the linker script. | |
255 | ||
256 | Two switches control the SDA: | |
257 | ||
258 | -G NNN - specifies the maximum size of variable to go in the SDA | |
259 | ||
260 | -msdata=foo - specifies how such variables are handled | |
261 | ||
262 | -msdata=none - small data area is disabled | |
263 | ||
264 | -msdata=sdata - small data goes in the SDA, special code isn't | |
265 | generated to use it, and special relocs aren't | |
266 | generated | |
267 | ||
268 | -msdata=use - small data goes in the SDA, special code is generated | |
269 | to use the SDA and special relocs are generated | |
270 | ||
271 | The SDA is not multilib'd, it isn't necessary. | |
272 | MULTILIB_EXTRA_OPTS is set in tmake_file to -msdata=sdata so multilib'd | |
273 | libraries have small data in .sdata/SHN_M32R_SCOMMON so programs that use | |
274 | -msdata=use will successfully link with them (references in header files | |
275 | will cause the compiler to emit code that refers to library objects in | |
276 | .data). ??? There can be a problem if the user passes a -G value greater | |
277 | than the default and a library object in a header file is that size. | |
278 | The default is 8 so this should be rare - if it occurs the user | |
279 | is required to rebuild the libraries or use a smaller value for -G. | |
280 | */ | |
281 | ||
282 | /* Maximum size of variables that go in .sdata/.sbss. | |
283 | The -msdata=foo switch also controls how small variables are handled. */ | |
56e2e762 | 284 | #ifndef SDATA_DEFAULT_SIZE |
8c5ca3b9 | 285 | #define SDATA_DEFAULT_SIZE 8 |
56e2e762 | 286 | #endif |
8c5ca3b9 DE |
287 | |
288 | extern int g_switch_value; /* value of the -G xx switch */ | |
289 | extern int g_switch_set; /* whether -G xx was passed. */ | |
290 | ||
291 | enum m32r_sdata { M32R_SDATA_NONE, M32R_SDATA_SDATA, M32R_SDATA_USE }; | |
292 | ||
293 | extern enum m32r_sdata m32r_sdata; | |
294 | #define TARGET_SDATA_NONE (m32r_sdata == M32R_SDATA_NONE) | |
295 | #define TARGET_SDATA_SDATA (m32r_sdata == M32R_SDATA_SDATA) | |
296 | #define TARGET_SDATA_USE (m32r_sdata == M32R_SDATA_USE) | |
297 | ||
298 | /* Default is to disable the SDA | |
299 | [for upward compatibility with previous toolchains]. */ | |
56e2e762 | 300 | #ifndef M32R_SDATA_DEFAULT |
8c5ca3b9 | 301 | #define M32R_SDATA_DEFAULT "none" |
56e2e762 | 302 | #endif |
8c5ca3b9 DE |
303 | |
304 | /* Define this macro as a C expression for the initializer of an array of | |
2b7972b0 | 305 | strings to tell the driver program which options are defaults for this |
8c5ca3b9 DE |
306 | target and thus do not need to be handled specially when using |
307 | `MULTILIB_OPTIONS'. */ | |
56e2e762 NC |
308 | #ifndef SUBTARGET_MULTILIB_DEFAULTS |
309 | #define SUBTARGET_MULTILIB_DEFAULTS | |
310 | #endif | |
311 | ||
312 | #ifndef MULTILIB_DEFAULTS | |
313 | #define MULTILIB_DEFAULTS { "mmodel=small" SUBTARGET_MULTILIB_DEFAULTS } | |
314 | #endif | |
8c5ca3b9 DE |
315 | |
316 | /* Sometimes certain combinations of command options do not make | |
317 | sense on a particular target machine. You can define a macro | |
318 | `OVERRIDE_OPTIONS' to take account of this. This macro, if | |
319 | defined, is executed once just after all the command options have | |
320 | been parsed. | |
321 | ||
322 | Don't use this macro to turn on various extra optimizations for | |
323 | `-O'. That is what `OPTIMIZATION_OPTIONS' is for. */ | |
324 | ||
56e2e762 NC |
325 | #ifndef SUBTARGET_OVERRIDE_OPTIONS |
326 | #define SUBTARGET_OVERRIDE_OPTIONS | |
327 | #endif | |
328 | ||
329 | #define OVERRIDE_OPTIONS \ | |
330 | do \ | |
331 | { \ | |
332 | /* These need to be done at start up. \ | |
333 | It's convenient to do them here. */ \ | |
334 | m32r_init (); \ | |
335 | SUBTARGET_OVERRIDE_OPTIONS \ | |
336 | } \ | |
337 | while (0) | |
338 | ||
339 | #ifndef SUBTARGET_OPTIMIZATION_OPTIONS | |
340 | #define SUBTARGET_OPTIMIZATION_OPTIONS | |
341 | #endif | |
342 | ||
343 | #define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \ | |
344 | do \ | |
345 | { \ | |
346 | if (LEVEL == 1) \ | |
347 | flag_regmove = TRUE; \ | |
348 | \ | |
349 | if (SIZE) \ | |
350 | { \ | |
351 | flag_omit_frame_pointer = TRUE; \ | |
352 | flag_strength_reduce = FALSE; \ | |
353 | } \ | |
354 | \ | |
355 | SUBTARGET_OPTIMIZATION_OPTIONS \ | |
356 | } \ | |
357 | while (0) | |
8c5ca3b9 DE |
358 | |
359 | /* Define this macro if debugging can be performed even without a | |
360 | frame pointer. If this macro is defined, GNU CC will turn on the | |
361 | `-fomit-frame-pointer' option whenever `-O' is specified. */ | |
362 | #define CAN_DEBUG_WITHOUT_FP | |
363 | \f | |
364 | /* Target machine storage layout. */ | |
365 | ||
366 | /* Define to use software floating point emulator for REAL_ARITHMETIC and | |
367 | decimal <-> binary conversion. */ | |
368 | #define REAL_ARITHMETIC | |
369 | ||
370 | /* Define this if most significant bit is lowest numbered | |
371 | in instructions that operate on numbered bit-fields. */ | |
372 | #define BITS_BIG_ENDIAN 1 | |
373 | ||
374 | /* Define this if most significant byte of a word is the lowest numbered. */ | |
375 | #define BYTES_BIG_ENDIAN 1 | |
376 | ||
377 | /* Define this if most significant word of a multiword number is the lowest | |
378 | numbered. */ | |
379 | #define WORDS_BIG_ENDIAN 1 | |
380 | ||
381 | /* Define this macro if WORDS_BIG_ENDIAN is not constant. This must | |
382 | be a constant value with the same meaning as WORDS_BIG_ENDIAN, | |
383 | which will be used only when compiling libgcc2.c. Typically the | |
384 | value will be set based on preprocessor defines. */ | |
385 | /*#define LIBGCC2_WORDS_BIG_ENDIAN 1*/ | |
386 | ||
387 | /* Number of bits in an addressable storage unit. */ | |
388 | #define BITS_PER_UNIT 8 | |
389 | ||
390 | /* Width in bits of a "word", which is the contents of a machine register. | |
391 | Note that this is not necessarily the width of data type `int'; | |
392 | if using 16-bit ints on a 68000, this would still be 32. | |
393 | But on a machine with 16-bit registers, this would be 16. */ | |
394 | #define BITS_PER_WORD 32 | |
395 | ||
396 | /* Width of a word, in units (bytes). */ | |
397 | #define UNITS_PER_WORD 4 | |
398 | ||
399 | /* Define this macro if it is advisable to hold scalars in registers | |
400 | in a wider mode than that declared by the program. In such cases, | |
401 | the value is constrained to be within the bounds of the declared | |
402 | type, but kept valid in the wider mode. The signedness of the | |
403 | extension may differ from that of the type. */ | |
56e2e762 NC |
404 | #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \ |
405 | if (GET_MODE_CLASS (MODE) == MODE_INT \ | |
406 | && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ | |
407 | { \ | |
408 | (MODE) = SImode; \ | |
409 | } | |
8c5ca3b9 DE |
410 | |
411 | /* Define this macro if the promotion described by `PROMOTE_MODE' | |
412 | should also be done for outgoing function arguments. */ | |
413 | /*#define PROMOTE_FUNCTION_ARGS*/ | |
414 | ||
415 | /* Likewise, if the function return value is promoted. | |
416 | If defined, FUNCTION_VALUE must perform the same promotions done by | |
417 | PROMOTE_MODE. */ | |
418 | /*#define PROMOTE_FUNCTION_RETURN*/ | |
419 | ||
420 | /* Width in bits of a pointer. | |
421 | See also the macro `Pmode' defined below. */ | |
422 | #define POINTER_SIZE 32 | |
423 | ||
424 | /* Allocation boundary (in *bits*) for storing arguments in argument list. */ | |
425 | #define PARM_BOUNDARY 32 | |
426 | ||
427 | /* Boundary (in *bits*) on which stack pointer should be aligned. */ | |
428 | #define STACK_BOUNDARY 32 | |
429 | ||
430 | /* ALIGN FRAMES on word boundaries */ | |
431 | #define M32R_STACK_ALIGN(LOC) (((LOC)+3) & ~3) | |
432 | ||
433 | /* Allocation boundary (in *bits*) for the code of a function. */ | |
434 | #define FUNCTION_BOUNDARY 32 | |
435 | ||
436 | /* Alignment of field after `int : 0' in a structure. */ | |
437 | #define EMPTY_FIELD_BOUNDARY 32 | |
438 | ||
439 | /* Every structure's size must be a multiple of this. */ | |
440 | #define STRUCTURE_SIZE_BOUNDARY 8 | |
441 | ||
442 | /* A bitfield declared as `int' forces `int' alignment for the struct. */ | |
443 | #define PCC_BITFIELD_TYPE_MATTERS 1 | |
444 | ||
445 | /* No data type wants to be aligned rounder than this. */ | |
446 | #define BIGGEST_ALIGNMENT 32 | |
447 | ||
448 | /* The best alignment to use in cases where we have a choice. */ | |
449 | #define FASTEST_ALIGNMENT 32 | |
450 | ||
451 | /* Make strings word-aligned so strcpy from constants will be faster. */ | |
56e2e762 | 452 | #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ |
8c5ca3b9 DE |
453 | ((TREE_CODE (EXP) == STRING_CST \ |
454 | && (ALIGN) < FASTEST_ALIGNMENT) \ | |
455 | ? FASTEST_ALIGNMENT : (ALIGN)) | |
456 | ||
457 | /* Make arrays of chars word-aligned for the same reasons. */ | |
56e2e762 NC |
458 | #define DATA_ALIGNMENT(TYPE, ALIGN) \ |
459 | (TREE_CODE (TYPE) == ARRAY_TYPE \ | |
460 | && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \ | |
8c5ca3b9 DE |
461 | && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN)) |
462 | ||
463 | /* Set this nonzero if move instructions will actually fail to work | |
464 | when given unaligned data. */ | |
465 | #define STRICT_ALIGNMENT 1 | |
466 | \f | |
467 | /* Layout of source language data types. */ | |
468 | ||
469 | #define SHORT_TYPE_SIZE 16 | |
470 | #define INT_TYPE_SIZE 32 | |
471 | #define LONG_TYPE_SIZE 32 | |
472 | #define LONG_LONG_TYPE_SIZE 64 | |
473 | #define FLOAT_TYPE_SIZE 32 | |
474 | #define DOUBLE_TYPE_SIZE 64 | |
475 | #define LONG_DOUBLE_TYPE_SIZE 64 | |
476 | ||
477 | /* Define this as 1 if `char' should by default be signed; else as 0. */ | |
478 | #define DEFAULT_SIGNED_CHAR 1 | |
479 | ||
480 | #define SIZE_TYPE "long unsigned int" | |
481 | #define PTRDIFF_TYPE "long int" | |
482 | #define WCHAR_TYPE "short unsigned int" | |
483 | #define WCHAR_TYPE_SIZE 16 | |
8c5ca3b9 DE |
484 | \f |
485 | /* Standard register usage. */ | |
486 | ||
487 | /* Number of actual hardware registers. | |
488 | The hardware registers are assigned numbers for the compiler | |
489 | from 0 to just below FIRST_PSEUDO_REGISTER. | |
490 | All registers that the compiler knows about must be given numbers, | |
491 | even those that are not normally considered general registers. */ | |
56e2e762 NC |
492 | |
493 | #define M32R_NUM_REGISTERS 19 | |
494 | ||
495 | #ifndef SUBTARGET_NUM_REGISTERS | |
496 | #define SUBTARGET_NUM_REGISTERS 0 | |
497 | #endif | |
498 | ||
499 | #define FIRST_PSEUDO_REGISTER (M32R_NUM_REGISTERS + SUBTARGET_NUM_REGISTERS) | |
2b7972b0 | 500 | |
8c5ca3b9 DE |
501 | /* 1 for registers that have pervasive standard uses |
502 | and are not available for the register allocator. | |
503 | ||
504 | 0-3 - arguments/results | |
505 | 4-5 - call used [4 is used as a tmp during prologue/epilogue generation] | |
506 | 6 - call used, gptmp | |
507 | 7 - call used, static chain pointer | |
508 | 8-11 - call saved | |
509 | 12 - call saved [reserved for global pointer] | |
510 | 13 - frame pointer | |
511 | 14 - subroutine link register | |
512 | 15 - stack pointer | |
513 | 16 - arg pointer | |
514 | 17 - carry flag | |
56e2e762 | 515 | 18 - accumulator |
8c5ca3b9 DE |
516 | |
517 | By default, the extension registers are not available. */ | |
518 | ||
56e2e762 NC |
519 | #ifndef SUBTARGET_FIXED_REGISTERS |
520 | #define SUBTARGET_FIXED_REGISTERS | |
521 | #endif | |
8c5ca3b9 | 522 | |
56e2e762 NC |
523 | #define FIXED_REGISTERS \ |
524 | { \ | |
525 | 0, 0, 0, 0, 0, 0, 0, 0, \ | |
526 | 0, 0, 0, 0, 0, 0, 0, 1, \ | |
527 | 1, 1, 1 \ | |
528 | SUBTARGET_FIXED_REGISTERS \ | |
529 | } | |
2b7972b0 | 530 | |
8c5ca3b9 DE |
531 | /* 1 for registers not available across function calls. |
532 | These must include the FIXED_REGISTERS and also any | |
533 | registers that can be used without being saved. | |
534 | The latter must include the registers where values are returned | |
535 | and the register where structure-value addresses are passed. | |
536 | Aside from that, you can include as many other registers as you like. */ | |
537 | ||
56e2e762 NC |
538 | #ifndef SUBTARGET_CALL_USED_REGISTERS |
539 | #define SUBTARGET_CALL_USED_REGISTERS | |
540 | #endif | |
8c5ca3b9 | 541 | |
56e2e762 NC |
542 | #define CALL_USED_REGISTERS \ |
543 | { \ | |
544 | 1, 1, 1, 1, 1, 1, 1, 1, \ | |
545 | 0, 0, 0, 0, 0, 0, 1, 1, \ | |
546 | 1, 1, 1 \ | |
547 | SUBTARGET_CALL_USED_REGISTERS \ | |
548 | } | |
2b7972b0 | 549 | |
8c5ca3b9 DE |
550 | /* Zero or more C statements that may conditionally modify two variables |
551 | `fixed_regs' and `call_used_regs' (both of type `char []') after they | |
552 | have been initialized from the two preceding macros. | |
553 | ||
554 | This is necessary in case the fixed or call-clobbered registers depend | |
555 | on target flags. | |
556 | ||
557 | You need not define this macro if it has no work to do. */ | |
558 | ||
56e2e762 NC |
559 | #ifdef SUBTARGET_CONDITIONAL_REGISTER_USAGE |
560 | #define CONDITIONAL_REGISTER_USAGE SUBTARGET_CONDITIONAL_REGISTER_USAGE | |
561 | #endif | |
8c5ca3b9 DE |
562 | |
563 | /* If defined, an initializer for a vector of integers, containing the | |
564 | numbers of hard registers in the order in which GNU CC should | |
565 | prefer to use them (from most preferred to least). */ | |
56e2e762 NC |
566 | |
567 | #ifndef SUBTARGET_REG_ALLOC_ORDER | |
568 | #define SUBTARGET_REG_ALLOC_ORDER | |
569 | #endif | |
570 | ||
9fd54896 | 571 | #if 1 /* better for int code */ |
56e2e762 NC |
572 | #define REG_ALLOC_ORDER \ |
573 | { \ | |
574 | 4, 5, 6, 7, 2, 3, 8, 9, 10, \ | |
575 | 11, 12, 13, 14, 0, 1, 15, 16, 17, 18 \ | |
576 | SUBTARGET_REG_ALLOC_ORDER \ | |
577 | } | |
578 | ||
9fd54896 | 579 | #else /* better for fp code at expense of int code */ |
56e2e762 NC |
580 | #define REG_ALLOC_ORDER \ |
581 | { \ | |
582 | 0, 1, 2, 3, 4, 5, 6, 7, 8, \ | |
583 | 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 \ | |
584 | SUBTARGET_REG_ALLOC_ORDER \ | |
585 | } | |
8c5ca3b9 DE |
586 | #endif |
587 | ||
588 | /* Return number of consecutive hard regs needed starting at reg REGNO | |
589 | to hold something of mode MODE. | |
590 | This is ordinarily the length in words of a value of mode MODE | |
591 | but can be less for certain modes in special long registers. */ | |
592 | #define HARD_REGNO_NREGS(REGNO, MODE) \ | |
593 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
594 | ||
595 | /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE. */ | |
596 | extern unsigned int m32r_hard_regno_mode_ok[]; | |
597 | extern unsigned int m32r_mode_class[]; | |
598 | #define HARD_REGNO_MODE_OK(REGNO, MODE) \ | |
599 | ((m32r_hard_regno_mode_ok[REGNO] & m32r_mode_class[MODE]) != 0) | |
600 | ||
601 | /* A C expression that is nonzero if it is desirable to choose | |
602 | register allocation so as to avoid move instructions between a | |
603 | value of mode MODE1 and a value of mode MODE2. | |
604 | ||
605 | If `HARD_REGNO_MODE_OK (R, MODE1)' and `HARD_REGNO_MODE_OK (R, | |
606 | MODE2)' are ever different for any R, then `MODES_TIEABLE_P (MODE1, | |
607 | MODE2)' must be zero. */ | |
608 | ||
609 | /* Tie QI/HI/SI modes together. */ | |
610 | #define MODES_TIEABLE_P(MODE1, MODE2) \ | |
611 | (GET_MODE_CLASS (MODE1) == MODE_INT \ | |
612 | && GET_MODE_CLASS (MODE2) == MODE_INT \ | |
613 | && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ | |
614 | && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) | |
615 | \f | |
616 | /* Register classes and constants. */ | |
617 | ||
618 | /* Define the classes of registers for register constraints in the | |
619 | machine description. Also define ranges of constants. | |
620 | ||
621 | One of the classes must always be named ALL_REGS and include all hard regs. | |
622 | If there is more than one class, another class must be named NO_REGS | |
623 | and contain no registers. | |
624 | ||
625 | The name GENERAL_REGS must be the name of a class (or an alias for | |
626 | another name such as ALL_REGS). This is the class of registers | |
627 | that is allowed by "g" or "r" in a register constraint. | |
628 | Also, registers outside this class are allocated only when | |
629 | instructions express preferences for them. | |
630 | ||
631 | The classes must be numbered in nondecreasing order; that is, | |
632 | a larger-numbered class must never be contained completely | |
633 | in a smaller-numbered class. | |
634 | ||
635 | For any two classes, it is very desirable that there be another | |
636 | class that represents their union. | |
637 | ||
638 | It is important that any condition codes have class NO_REGS. | |
639 | See `register_operand'. */ | |
640 | ||
56e2e762 NC |
641 | enum reg_class |
642 | { | |
643 | NO_REGS, CARRY_REG, ACCUM_REGS, GENERAL_REGS, ALL_REGS, LIM_REG_CLASSES | |
8c5ca3b9 DE |
644 | }; |
645 | ||
56e2e762 | 646 | #define N_REG_CLASSES ((int) LIM_REG_CLASSES) |
8c5ca3b9 DE |
647 | |
648 | /* Give names of register classes as strings for dump file. */ | |
649 | #define REG_CLASS_NAMES \ | |
56e2e762 | 650 | { "NO_REGS", "CARRY_REG", "ACCUM_REGS", "GENERAL_REGS", "ALL_REGS" } |
8c5ca3b9 DE |
651 | |
652 | /* Define which registers fit in which classes. | |
653 | This is an initializer for a vector of HARD_REG_SET | |
654 | of length N_REG_CLASSES. */ | |
655 | ||
56e2e762 NC |
656 | #ifndef SUBTARGET_REG_CLASS_CARRY |
657 | #define SUBTARGET_REG_CLASS_CARRY 0 | |
658 | #endif | |
659 | ||
660 | #ifndef SUBTARGET_REG_CLASS_ACCUM | |
661 | #define SUBTARGET_REG_CLASS_ACCUM 0 | |
662 | #endif | |
663 | ||
664 | #ifndef SUBTARGET_REG_CLASS_GENERAL | |
665 | #define SUBTARGET_REG_CLASS_GENERAL 0 | |
666 | #endif | |
667 | ||
668 | #ifndef SUBTARGET_REG_CLASS_ALL | |
669 | #define SUBTARGET_REG_CLASS_ALL 0 | |
670 | #endif | |
8c5ca3b9 | 671 | |
56e2e762 NC |
672 | #define REG_CLASS_CONTENTS \ |
673 | { \ | |
674 | { 0x00000 }, \ | |
675 | { 0x20000 | SUBTARGET_REG_CLASS_CARRY }, \ | |
676 | { 0x40000 | SUBTARGET_REG_CLASS_ACCUM }, \ | |
677 | { 0x1ffff | SUBTARGET_REG_CLASS_GENERAL }, \ | |
678 | { 0x7ffff | SUBTARGET_REG_CLASS_ALL }, \ | |
679 | } | |
2b7972b0 | 680 | |
8c5ca3b9 DE |
681 | /* The same information, inverted: |
682 | Return the class number of the smallest class containing | |
683 | reg number REGNO. This could be a conditional expression | |
684 | or could index an array. */ | |
2b7972b0 | 685 | extern enum reg_class m32r_regno_reg_class[FIRST_PSEUDO_REGISTER]; |
56e2e762 | 686 | #define REGNO_REG_CLASS(REGNO) (m32r_regno_reg_class[REGNO]) |
8c5ca3b9 DE |
687 | |
688 | /* The class value for index registers, and the one for base regs. */ | |
689 | #define INDEX_REG_CLASS GENERAL_REGS | |
690 | #define BASE_REG_CLASS GENERAL_REGS | |
691 | ||
56e2e762 NC |
692 | #define REG_CLASS_FROM_LETTER(C) \ |
693 | ((C) == 'c' ? CARRY_REG \ | |
694 | : (C) == 'a' ? ACCUM_REGS \ | |
695 | : NO_REGS) | |
8c5ca3b9 DE |
696 | |
697 | /* These assume that REGNO is a hard or pseudo reg number. | |
698 | They give nonzero only if REGNO is a hard reg of the suitable class | |
699 | or a pseudo reg currently allocated to a suitable hard reg. | |
700 | Since they use reg_renumber, they are safe only once reg_renumber | |
701 | has been allocated, which happens in local-alloc.c. */ | |
702 | #define REGNO_OK_FOR_BASE_P(REGNO) \ | |
703 | ((REGNO) < FIRST_PSEUDO_REGISTER \ | |
704 | ? GPR_P (REGNO) || (REGNO) == ARG_POINTER_REGNUM \ | |
705 | : GPR_P (reg_renumber[REGNO])) | |
706 | #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO) | |
707 | ||
708 | /* Given an rtx X being reloaded into a reg required to be | |
709 | in class CLASS, return the class of reg to actually use. | |
710 | In general this is just CLASS; but on some machines | |
711 | in some cases it is preferable to use a more restrictive class. */ | |
712 | #define PREFERRED_RELOAD_CLASS(X,CLASS) \ | |
713 | (CLASS) | |
714 | ||
715 | /* Return the maximum number of consecutive registers | |
716 | needed to represent mode MODE in a register of class CLASS. */ | |
717 | #define CLASS_MAX_NREGS(CLASS, MODE) \ | |
718 | ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) | |
719 | ||
720 | /* The letters I, J, K, L, M, N, O, P in a register constraint string | |
721 | can be used to stand for particular ranges of immediate operands. | |
722 | This macro defines what the ranges are. | |
723 | C is the letter, and VALUE is a constant value. | |
724 | Return 1 if VALUE is in the range specified by C. */ | |
725 | /* 'I' is used for 8 bit signed immediates. | |
726 | 'J' is used for 16 bit signed immediates. | |
727 | 'K' is used for 16 bit unsigned immediates. | |
728 | 'L' is used for 16 bit immediates left shifted by 16 (sign ???). | |
729 | 'M' is used for 24 bit unsigned immediates. | |
730 | 'N' is used for any 32 bit non-symbolic value. | |
731 | 'O' is used for 5 bit unsigned immediates (shift count). | |
732 | 'P' is used for 16 bit signed immediates for compares | |
733 | (values in the range -32767 to +32768). */ | |
734 | ||
56e2e762 NC |
735 | /* Return true if a value is inside a range. */ |
736 | #define IN_RANGE_P(VALUE, LOW, HIGH) \ | |
737 | (((unsigned HOST_WIDE_INT)((VALUE) - (LOW))) \ | |
738 | <= ((unsigned HOST_WIDE_INT)((HIGH) - (LOW)))) | |
739 | ||
740 | /* Local to this file. */ | |
40cae311 RH |
741 | #define INT8_P(X) ((X) >= -0x80 && (X) <= 0x7f) |
742 | #define INT16_P(X) ((X) >= -0x8000 && (X) <= 0x7fff) | |
743 | #define CMP_INT16_P(X) ((X) >= -0x7fff && (X) <= 0x8000) | |
40cae311 RH |
744 | #define UPPER16_P(X) (((X) & 0xffff) == 0 \ |
745 | && ((X) >> 16) >= -0x8000 \ | |
746 | && ((X) >> 16) <= 0x7fff) | |
16f104b3 NC |
747 | #define UINT16_P(X) (((unsigned HOST_WIDE_INT) (X)) <= 0x0000ffff) |
748 | #define UINT24_P(X) (((unsigned HOST_WIDE_INT) (X)) <= 0x00ffffff) | |
749 | #define UINT32_P(X) (((unsigned HOST_WIDE_INT) (X)) <= 0xffffffff) | |
750 | #define UINT5_P(X) ((X) >= 0 && (X) < 32) | |
5b8ae21f | 751 | #define INVERTED_SIGNED_8BIT(VAL) ((VAL) >= -127 && (VAL) <= 128) |
8c5ca3b9 | 752 | |
5b8ae21f MM |
753 | #define CONST_OK_FOR_LETTER_P(VALUE, C) \ |
754 | ((C) == 'I' ? INT8_P (VALUE) \ | |
755 | : (C) == 'J' ? INT16_P (VALUE) \ | |
756 | : (C) == 'K' ? UINT16_P (VALUE) \ | |
757 | : (C) == 'L' ? UPPER16_P (VALUE) \ | |
758 | : (C) == 'M' ? UINT24_P (VALUE) \ | |
759 | : (C) == 'N' ? INVERTED_SIGNED_8BIT (VALUE) \ | |
760 | : (C) == 'O' ? UINT5_P (VALUE) \ | |
761 | : (C) == 'P' ? CMP_INT16_P (VALUE) \ | |
8c5ca3b9 DE |
762 | : 0) |
763 | ||
764 | /* Similar, but for floating constants, and defining letters G and H. | |
765 | Here VALUE is the CONST_DOUBLE rtx itself. | |
766 | For the m32r, handle a few constants inline. | |
767 | ??? We needn't treat DI and DF modes differently, but for now we do. */ | |
768 | #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ | |
5b8ae21f MM |
769 | ((C) == 'G' ? easy_di_const (VALUE) \ |
770 | : (C) == 'H' ? easy_df_const (VALUE) \ | |
8c5ca3b9 DE |
771 | : 0) |
772 | ||
773 | /* A C expression that defines the optional machine-dependent constraint | |
774 | letters that can be used to segregate specific types of operands, | |
775 | usually memory references, for the target machine. It should return 1 if | |
776 | VALUE corresponds to the operand type represented by the constraint letter | |
777 | C. If C is not defined as an extra constraint, the value returned should | |
778 | be 0 regardless of VALUE. */ | |
779 | /* Q is for symbolic addresses loadable with ld24. | |
2b7972b0 | 780 | R is for symbolic addresses when ld24 can't be used. |
56e2e762 | 781 | S is for stores with pre {inc,dec}rement |
5b8ae21f | 782 | T is for indirect of a pointer. |
56e2e762 | 783 | U is for loads with post increment. */ |
5b8ae21f MM |
784 | |
785 | #define EXTRA_CONSTRAINT(VALUE, C) \ | |
56e2e762 NC |
786 | ( (C) == 'Q' ? ((TARGET_ADDR24 && GET_CODE (VALUE) == LABEL_REF) \ |
787 | || addr24_operand (VALUE, VOIDmode)) \ | |
788 | : (C) == 'R' ? ((TARGET_ADDR32 && GET_CODE (VALUE) == LABEL_REF) \ | |
789 | || addr32_operand (VALUE, VOIDmode)) \ | |
790 | : (C) == 'S' ? (GET_CODE (VALUE) == MEM \ | |
791 | && STORE_PREINC_PREDEC_P (GET_MODE (VALUE), \ | |
792 | XEXP (VALUE, 0))) \ | |
793 | : (C) == 'T' ? (GET_CODE (VALUE) == MEM \ | |
794 | && memreg_operand (VALUE, GET_MODE (VALUE))) \ | |
795 | : (C) == 'U' ? (GET_CODE (VALUE) == MEM \ | |
796 | && LOAD_POSTINC_P (GET_MODE (VALUE), \ | |
797 | XEXP (VALUE, 0))) \ | |
8c5ca3b9 DE |
798 | : 0) |
799 | \f | |
800 | /* Stack layout and stack pointer usage. */ | |
801 | ||
802 | /* Define this macro if pushing a word onto the stack moves the stack | |
803 | pointer to a smaller address. */ | |
804 | #define STACK_GROWS_DOWNWARD | |
805 | ||
806 | /* Define this if the nominal address of the stack frame | |
807 | is at the high-address end of the local variables; | |
808 | that is, each additional local variable allocated | |
809 | goes at a more negative offset from the frame pointer. */ | |
810 | /*#define FRAME_GROWS_DOWNWARD*/ | |
811 | ||
812 | /* Offset from frame pointer to start allocating local variables at. | |
813 | If FRAME_GROWS_DOWNWARD, this is the offset to the END of the | |
814 | first local allocated. Otherwise, it is the offset to the BEGINNING | |
815 | of the first local allocated. */ | |
816 | /* The frame pointer points at the same place as the stack pointer, except if | |
817 | alloca has been called. */ | |
818 | #define STARTING_FRAME_OFFSET \ | |
819 | M32R_STACK_ALIGN (current_function_outgoing_args_size) | |
820 | ||
821 | /* Offset from the stack pointer register to the first location at which | |
822 | outgoing arguments are placed. */ | |
823 | #define STACK_POINTER_OFFSET 0 | |
824 | ||
825 | /* Offset of first parameter from the argument pointer register value. */ | |
826 | #define FIRST_PARM_OFFSET(FNDECL) 0 | |
827 | ||
828 | /* A C expression whose value is RTL representing the address in a | |
829 | stack frame where the pointer to the caller's frame is stored. | |
830 | Assume that FRAMEADDR is an RTL expression for the address of the | |
831 | stack frame itself. | |
832 | ||
833 | If you don't define this macro, the default is to return the value | |
834 | of FRAMEADDR--that is, the stack frame address is also the address | |
835 | of the stack word that points to the previous frame. */ | |
836 | /*define DYNAMIC_CHAIN_ADDRESS (FRAMEADDR)*/ | |
837 | ||
838 | /* A C expression whose value is RTL representing the value of the | |
839 | return address for the frame COUNT steps up from the current frame. | |
840 | FRAMEADDR is the frame pointer of the COUNT frame, or the frame | |
841 | pointer of the COUNT - 1 frame if `RETURN_ADDR_IN_PREVIOUS_FRAME' | |
842 | is defined. */ | |
843 | /* The current return address is in r14. */ | |
844 | #if 0 /* The default value should work. */ | |
845 | #define RETURN_ADDR_RTX(COUNT, FRAME) \ | |
c5c76735 JL |
846 | (((COUNT) == -1) \ |
847 | ? gen_rtx_REG (Pmode, 14) \ | |
848 | : copy_to_reg (gen_rtx_MEM (Pmode, \ | |
849 | memory_address (Pmode, \ | |
850 | plus_constant ((FRAME), \ | |
851 | UNITS_PER_WORD))))) | |
8c5ca3b9 DE |
852 | #endif |
853 | ||
854 | /* Register to use for pushing function arguments. */ | |
855 | #define STACK_POINTER_REGNUM 15 | |
856 | ||
857 | /* Base register for access to local variables of the function. */ | |
858 | #define FRAME_POINTER_REGNUM 13 | |
859 | ||
860 | /* Base register for access to arguments of the function. */ | |
861 | #define ARG_POINTER_REGNUM 16 | |
862 | ||
863 | /* The register number of the return address pointer register, which | |
864 | is used to access the current function's return address from the | |
865 | stack. On some machines, the return address is not at a fixed | |
866 | offset from the frame pointer or stack pointer or argument | |
867 | pointer. This register can be defined to point to the return | |
868 | address on the stack, and then be converted by `ELIMINABLE_REGS' | |
869 | into either the frame pointer or stack pointer. | |
870 | ||
871 | Do not define this macro unless there is no other way to get the | |
872 | return address from the stack. */ | |
18543a22 | 873 | /* ??? revisit */ |
8c5ca3b9 DE |
874 | /* #define RETURN_ADDRESS_POINTER_REGNUM */ |
875 | ||
876 | /* Register in which static-chain is passed to a function. This must | |
877 | not be a register used by the prologue. */ | |
878 | #define STATIC_CHAIN_REGNUM 7 | |
879 | ||
880 | /* These aren't official macros. */ | |
881 | #define PROLOGUE_TMP_REGNUM 4 | |
882 | #define RETURN_ADDR_REGNUM 14 | |
883 | /* #define GP_REGNUM 12 */ | |
884 | #define CARRY_REGNUM 17 | |
56e2e762 | 885 | #define ACCUM_REGNUM 18 |
8c5ca3b9 DE |
886 | #define M32R_MAX_INT_REGS 16 |
887 | ||
56e2e762 NC |
888 | #ifndef SUBTARGET_GPR_P |
889 | #define SUBTARGET_GPR_P(REGNO) 0 | |
890 | #endif | |
891 | ||
892 | #ifndef SUBTARGET_ACCUM_P | |
893 | #define SUBTARGET_ACCUM_P(REGNO) 0 | |
894 | #endif | |
895 | ||
896 | #ifndef SUBTARGET_CARRY_P | |
897 | #define SUBTARGET_CARRY_P(REGNO) 0 | |
898 | #endif | |
899 | ||
900 | #define GPR_P(REGNO) (IN_RANGE_P ((REGNO), 0, 15) || SUBTARGET_GPR_P (REGNO)) | |
901 | #define ACCUM_P(REGNO) ((REGNO) == ACCUM_REGNUM || SUBTARGET_ACCUM_P (REGNO)) | |
902 | #define CARRY_P(REGNO) ((REGNO) == CARRY_REGNUM || SUBTARGET_CARRY_P (REGNO)) | |
8c5ca3b9 DE |
903 | \f |
904 | /* Eliminating the frame and arg pointers. */ | |
905 | ||
906 | /* A C expression which is nonzero if a function must have and use a | |
907 | frame pointer. This expression is evaluated in the reload pass. | |
908 | If its value is nonzero the function will have a frame pointer. */ | |
56e2e762 | 909 | #define FRAME_POINTER_REQUIRED current_function_calls_alloca |
8c5ca3b9 DE |
910 | |
911 | #if 0 | |
912 | /* C statement to store the difference between the frame pointer | |
913 | and the stack pointer values immediately after the function prologue. | |
914 | If `ELIMINABLE_REGS' is defined, this macro will be not be used and | |
915 | need not be defined. */ | |
916 | #define INITIAL_FRAME_POINTER_OFFSET(VAR) \ | |
917 | ((VAR) = m32r_compute_frame_size (get_frame_size ())) | |
918 | #endif | |
919 | ||
920 | /* If defined, this macro specifies a table of register pairs used to | |
921 | eliminate unneeded registers that point into the stack frame. If | |
922 | it is not defined, the only elimination attempted by the compiler | |
923 | is to replace references to the frame pointer with references to | |
924 | the stack pointer. | |
925 | ||
926 | Note that the elimination of the argument pointer with the stack | |
927 | pointer is specified first since that is the preferred elimination. */ | |
928 | ||
56e2e762 NC |
929 | #define ELIMINABLE_REGS \ |
930 | {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ | |
931 | { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ | |
932 | { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM }} | |
8c5ca3b9 DE |
933 | |
934 | /* A C expression that returns non-zero if the compiler is allowed to | |
935 | try to replace register number FROM-REG with register number | |
936 | TO-REG. This macro need only be defined if `ELIMINABLE_REGS' is | |
937 | defined, and will usually be the constant 1, since most of the | |
938 | cases preventing register elimination are things that the compiler | |
939 | already knows about. */ | |
940 | ||
56e2e762 NC |
941 | #define CAN_ELIMINATE(FROM, TO) \ |
942 | ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM \ | |
943 | ? ! frame_pointer_needed \ | |
944 | : 1) | |
8c5ca3b9 DE |
945 | |
946 | /* This macro is similar to `INITIAL_FRAME_POINTER_OFFSET'. It | |
947 | specifies the initial difference between the specified pair of | |
948 | registers. This macro must be defined if `ELIMINABLE_REGS' is | |
949 | defined. */ | |
950 | ||
951 | #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ | |
952 | { \ | |
953 | int size = m32r_compute_frame_size (get_frame_size ()); \ | |
954 | \ | |
955 | if ((FROM) == FRAME_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ | |
956 | (OFFSET) = 0; \ | |
957 | else if ((FROM) == ARG_POINTER_REGNUM && (TO) == FRAME_POINTER_REGNUM) \ | |
958 | (OFFSET) = size - current_function_pretend_args_size; \ | |
959 | else if ((FROM) == ARG_POINTER_REGNUM && (TO) == STACK_POINTER_REGNUM) \ | |
960 | (OFFSET) = size - current_function_pretend_args_size; \ | |
961 | else \ | |
962 | abort (); \ | |
963 | } | |
964 | \f | |
965 | /* Function argument passing. */ | |
966 | ||
967 | /* When a prototype says `char' or `short', really pass an `int'. */ | |
cb560352 | 968 | #define PROMOTE_PROTOTYPES 1 |
8c5ca3b9 DE |
969 | |
970 | /* If defined, the maximum amount of space required for outgoing | |
971 | arguments will be computed and placed into the variable | |
972 | `current_function_outgoing_args_size'. No space will be pushed | |
973 | onto the stack for each call; instead, the function prologue should | |
974 | increase the stack frame size by this amount. */ | |
f73ad30e | 975 | #define ACCUMULATE_OUTGOING_ARGS 1 |
8c5ca3b9 DE |
976 | |
977 | /* Define this macro if functions should assume that stack space has | |
978 | been allocated for arguments even when their values are passed in | |
979 | registers. | |
980 | ||
981 | The value of this macro is the size, in bytes, of the area | |
982 | reserved for arguments passed in registers for the function | |
983 | represented by FNDECL. | |
984 | ||
985 | This space can be allocated by the caller, or be a part of the | |
986 | machine-dependent stack frame: `OUTGOING_REG_PARM_STACK_SPACE' says | |
987 | which. */ | |
988 | #if 0 | |
989 | #define REG_PARM_STACK_SPACE(FNDECL) \ | |
56e2e762 | 990 | (M32R_MAX_PARM_REGS * UNITS_PER_WORD) |
8c5ca3b9 DE |
991 | #endif |
992 | ||
993 | /* Value is the number of bytes of arguments automatically | |
994 | popped when returning from a subroutine call. | |
995 | FUNDECL is the declaration node of the function (as a tree), | |
996 | FUNTYPE is the data type of the function (as a tree), | |
997 | or for a library call it is an identifier node for the subroutine name. | |
998 | SIZE is the number of bytes of arguments passed on the stack. */ | |
999 | #define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 0 | |
1000 | ||
4abfe235 | 1001 | /* Nonzero if we do not know how to pass TYPE solely in registers. */ |
56e2e762 | 1002 | #define MUST_PASS_IN_STACK(MODE, TYPE) \ |
4abfe235 NC |
1003 | ((TYPE) != 0 \ |
1004 | && (TREE_CODE (TYPE_SIZE (TYPE)) != INTEGER_CST \ | |
1005 | || TREE_ADDRESSABLE (TYPE))) | |
1006 | ||
8c5ca3b9 DE |
1007 | /* Define a data type for recording info about an argument list |
1008 | during the scan of that argument list. This data type should | |
1009 | hold all necessary information about the function itself | |
1010 | and about the args processed so far, enough to enable macros | |
1011 | such as FUNCTION_ARG to determine where the next arg should go. */ | |
1012 | #define CUMULATIVE_ARGS int | |
1013 | ||
1014 | /* Initialize a variable CUM of type CUMULATIVE_ARGS | |
1015 | for a call to a function whose data type is FNTYPE. | |
1016 | For a library call, FNTYPE is 0. */ | |
56e2e762 NC |
1017 | #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \ |
1018 | ((CUM) = 0) | |
8c5ca3b9 DE |
1019 | |
1020 | /* The number of registers used for parameter passing. Local to this file. */ | |
1021 | #define M32R_MAX_PARM_REGS 4 | |
1022 | ||
1023 | /* 1 if N is a possible register number for function argument passing. */ | |
1024 | #define FUNCTION_ARG_REGNO_P(N) \ | |
56e2e762 | 1025 | ((unsigned) (N) < M32R_MAX_PARM_REGS) |
8c5ca3b9 DE |
1026 | |
1027 | /* The ROUND_ADVANCE* macros are local to this file. */ | |
1028 | /* Round SIZE up to a word boundary. */ | |
1029 | #define ROUND_ADVANCE(SIZE) \ | |
56e2e762 | 1030 | (((SIZE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) |
8c5ca3b9 DE |
1031 | |
1032 | /* Round arg MODE/TYPE up to the next word boundary. */ | |
1033 | #define ROUND_ADVANCE_ARG(MODE, TYPE) \ | |
56e2e762 | 1034 | ((MODE) == BLKmode \ |
16f104b3 | 1035 | ? ROUND_ADVANCE ((unsigned int) int_size_in_bytes (TYPE)) \ |
56e2e762 | 1036 | : ROUND_ADVANCE (GET_MODE_SIZE (MODE))) |
8c5ca3b9 DE |
1037 | |
1038 | /* Round CUM up to the necessary point for argument MODE/TYPE. */ | |
8c5ca3b9 | 1039 | #define ROUND_ADVANCE_CUM(CUM, MODE, TYPE) (CUM) |
8c5ca3b9 DE |
1040 | |
1041 | /* Return boolean indicating arg of type TYPE and mode MODE will be passed in | |
1042 | a reg. This includes arguments that have to be passed by reference as the | |
1043 | pointer to them is passed in a reg if one is available (and that is what | |
1044 | we're given). | |
1045 | This macro is only used in this file. */ | |
1046 | #define PASS_IN_REG_P(CUM, MODE, TYPE, NAMED) \ | |
56e2e762 | 1047 | (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) < M32R_MAX_PARM_REGS) |
8c5ca3b9 DE |
1048 | |
1049 | /* Determine where to put an argument to a function. | |
1050 | Value is zero to push the argument on the stack, | |
1051 | or a hard register in which to store the argument. | |
1052 | ||
1053 | MODE is the argument's machine mode. | |
1054 | TYPE is the data type of the argument (as a tree). | |
1055 | This is null for libcalls where that information may | |
1056 | not be available. | |
1057 | CUM is a variable of type CUMULATIVE_ARGS which gives info about | |
1058 | the preceding args and about the function being called. | |
1059 | NAMED is nonzero if this argument is a named parameter | |
1060 | (otherwise it is an extra parameter matching an ellipsis). */ | |
1061 | /* On the M32R the first M32R_MAX_PARM_REGS args are normally in registers | |
1062 | and the rest are pushed. */ | |
1063 | #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ | |
56e2e762 NC |
1064 | (PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED)) \ |
1065 | ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \ | |
1066 | : 0) | |
8c5ca3b9 | 1067 | |
18543a22 | 1068 | /* ??? Quick hack to try to get varargs working the normal way. */ |
8c5ca3b9 | 1069 | #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ |
56e2e762 NC |
1070 | (((! current_function_varargs || (NAMED)) \ |
1071 | && PASS_IN_REG_P ((CUM), (MODE), (TYPE), (NAMED))) \ | |
1072 | ? gen_rtx_REG ((MODE), ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE))) \ | |
1073 | : 0) | |
8c5ca3b9 DE |
1074 | |
1075 | /* A C expression for the number of words, at the beginning of an | |
1076 | argument, must be put in registers. The value must be zero for | |
1077 | arguments that are passed entirely in registers or that are entirely | |
1078 | pushed on the stack. | |
1079 | ||
1080 | On some machines, certain arguments must be passed partially in | |
1081 | registers and partially in memory. On these machines, typically the | |
1082 | first @var{n} words of arguments are passed in registers, and the rest | |
1083 | on the stack. If a multi-word argument (a @code{double} or a | |
1084 | structure) crosses that boundary, its first few words must be passed | |
1085 | in registers and the rest must be pushed. This macro tells the | |
1086 | compiler when this occurs, and how many of the words should go in | |
1087 | registers. */ | |
1088 | #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \ | |
2b7972b0 | 1089 | function_arg_partial_nregs (&CUM, (int)MODE, TYPE, NAMED) |
8c5ca3b9 DE |
1090 | |
1091 | /* A C expression that indicates when an argument must be passed by | |
1092 | reference. If nonzero for an argument, a copy of that argument is | |
1093 | made in memory and a pointer to the argument is passed instead of | |
1094 | the argument itself. The pointer is passed in whatever way is | |
1095 | appropriate for passing a pointer to that type. */ | |
1096 | /* All arguments greater than 8 bytes are passed this way. */ | |
1097 | #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \ | |
56e2e762 | 1098 | ((TYPE) && int_size_in_bytes (TYPE) > 8) |
8c5ca3b9 DE |
1099 | |
1100 | /* Update the data in CUM to advance over an argument | |
1101 | of mode MODE and data type TYPE. | |
1102 | (TYPE is null for libcalls where that information may not be available.) */ | |
1103 | #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ | |
56e2e762 | 1104 | ((CUM) = (ROUND_ADVANCE_CUM ((CUM), (MODE), (TYPE)) \ |
8c5ca3b9 DE |
1105 | + ROUND_ADVANCE_ARG ((MODE), (TYPE)))) |
1106 | ||
1107 | /* If defined, a C expression that gives the alignment boundary, in bits, | |
1108 | of an argument with the specified mode and type. If it is not defined, | |
1109 | PARM_BOUNDARY is used for all arguments. */ | |
1110 | #if 0 | |
1111 | /* We assume PARM_BOUNDARY == UNITS_PER_WORD here. */ | |
1112 | #define FUNCTION_ARG_BOUNDARY(MODE, TYPE) \ | |
1113 | (((TYPE) ? TYPE_ALIGN (TYPE) : GET_MODE_BITSIZE (MODE)) <= PARM_BOUNDARY \ | |
1114 | ? PARM_BOUNDARY \ | |
1115 | : 2 * PARM_BOUNDARY) | |
1116 | #endif | |
1117 | ||
8c5ca3b9 DE |
1118 | /* This macro offers an alternative |
1119 | to using `__builtin_saveregs' and defining the macro | |
1120 | `EXPAND_BUILTIN_SAVEREGS'. Use it to store the anonymous register | |
1121 | arguments into the stack so that all the arguments appear to have | |
1122 | been passed consecutively on the stack. Once this is done, you | |
1123 | can use the standard implementation of varargs that works for | |
1124 | machines that pass all their arguments on the stack. | |
1125 | ||
1126 | The argument ARGS_SO_FAR is the `CUMULATIVE_ARGS' data structure, | |
1127 | containing the values that obtain after processing of the named | |
1128 | arguments. The arguments MODE and TYPE describe the last named | |
1129 | argument--its machine mode and its data type as a tree node. | |
1130 | ||
1131 | The macro implementation should do two things: first, push onto the | |
1132 | stack all the argument registers *not* used for the named | |
1133 | arguments, and second, store the size of the data thus pushed into | |
1134 | the `int'-valued variable whose name is supplied as the argument | |
1135 | PRETEND_SIZE. The value that you store here will serve as | |
1136 | additional offset for setting up the stack frame. | |
1137 | ||
1138 | If the argument NO_RTL is nonzero, it means that the | |
1139 | arguments of the function are being analyzed for the second time. | |
1140 | This happens for an inline function, which is not actually | |
1141 | compiled until the end of the source file. The macro | |
1142 | `SETUP_INCOMING_VARARGS' should not generate any instructions in | |
1143 | this case. */ | |
1144 | ||
1145 | #define SETUP_INCOMING_VARARGS(ARGS_SO_FAR, MODE, TYPE, PRETEND_SIZE, NO_RTL) \ | |
56e2e762 | 1146 | m32r_setup_incoming_varargs (&ARGS_SO_FAR, MODE, TYPE, &PRETEND_SIZE, NO_RTL) |
40cae311 RH |
1147 | |
1148 | /* Implement `va_arg'. */ | |
1149 | #define EXPAND_BUILTIN_VA_ARG(valist, type) \ | |
1150 | m32r_va_arg (valist, type) | |
8c5ca3b9 DE |
1151 | \f |
1152 | /* Function results. */ | |
1153 | ||
1154 | /* Define how to find the value returned by a function. | |
1155 | VALTYPE is the data type of the value (as a tree). | |
1156 | If the precise function being called is known, FUNC is its FUNCTION_DECL; | |
1157 | otherwise, FUNC is 0. */ | |
c5c76735 | 1158 | #define FUNCTION_VALUE(VALTYPE, FUNC) gen_rtx_REG (TYPE_MODE (VALTYPE), 0) |
8c5ca3b9 DE |
1159 | |
1160 | /* Define how to find the value returned by a library function | |
1161 | assuming the value has mode MODE. */ | |
c5c76735 | 1162 | #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0) |
8c5ca3b9 DE |
1163 | |
1164 | /* 1 if N is a possible register number for a function value | |
1165 | as seen by the caller. */ | |
1166 | /* ??? What about r1 in DI/DF values. */ | |
1167 | #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0) | |
1168 | ||
1169 | /* A C expression which can inhibit the returning of certain function | |
1170 | values in registers, based on the type of value. A nonzero value says | |
1171 | to return the function value in memory, just as large structures are | |
1172 | always returned. Here TYPE will be a C expression of type `tree', | |
1173 | representing the data type of the value. */ | |
1174 | #define RETURN_IN_MEMORY(TYPE) \ | |
1175 | (int_size_in_bytes (TYPE) > 8) | |
1176 | ||
1177 | /* Tell GCC to use RETURN_IN_MEMORY. */ | |
1178 | #define DEFAULT_PCC_STRUCT_RETURN 0 | |
1179 | ||
1180 | /* Register in which address to store a structure value | |
1181 | is passed to a function, or 0 to use `invisible' first argument. */ | |
1182 | #define STRUCT_VALUE 0 | |
1183 | \f | |
1184 | /* Function entry and exit. */ | |
1185 | ||
1186 | /* Initialize data used by insn expanders. This is called from | |
1187 | init_emit, once for each function, before code is generated. */ | |
1188 | #define INIT_EXPANDERS m32r_init_expanders () | |
1189 | ||
8c5ca3b9 DE |
1190 | /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function, |
1191 | the stack pointer does not matter. The value is tested only in | |
1192 | functions that have frame pointers. | |
1193 | No definition is equivalent to always zero. */ | |
1194 | #define EXIT_IGNORE_STACK 1 | |
1195 | ||
8c5ca3b9 DE |
1196 | /* Output assembler code to FILE to increment profiler label # LABELNO |
1197 | for profiling a function entry. */ | |
5b8ae21f | 1198 | #define FUNCTION_PROFILER(FILE, LABELNO) abort () |
8c5ca3b9 DE |
1199 | \f |
1200 | /* Trampolines. */ | |
1201 | ||
1202 | /* On the M32R, the trampoline is | |
1203 | ||
1204 | ld24 r7,STATIC | |
1205 | ld24 r6,FUNCTION | |
1206 | jmp r6 | |
1207 | nop | |
1208 | ||
18543a22 | 1209 | ??? Need addr32 support. |
8c5ca3b9 DE |
1210 | */ |
1211 | ||
1212 | /* Length in bytes of the trampoline for entering a nested function. */ | |
1213 | #define TRAMPOLINE_SIZE 12 | |
1214 | ||
1215 | /* Emit RTL insns to initialize the variable parts of a trampoline. | |
1216 | FNADDR is an RTX for the address of the function's pure code. | |
1217 | CXT is an RTX for the static chain value for the function. */ | |
1218 | #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \ | |
1219 | do { \ | |
c5c76735 | 1220 | emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 0)), \ |
8c5ca3b9 | 1221 | plus_constant ((CXT), 0xe7000000)); \ |
c5c76735 | 1222 | emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 4)), \ |
8c5ca3b9 | 1223 | plus_constant ((FNADDR), 0xe6000000)); \ |
c5c76735 | 1224 | emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 8)), \ |
8c5ca3b9 | 1225 | GEN_INT (0x1fc67000)); \ |
c5c76735 | 1226 | emit_insn (gen_flush_icache (validize_mem (gen_rtx_MEM (SImode, TRAMP)))); \ |
8c5ca3b9 DE |
1227 | } while (0) |
1228 | \f | |
1229 | /* Library calls. */ | |
1230 | ||
1231 | /* Generate calls to memcpy, memcmp and memset. */ | |
1232 | #define TARGET_MEM_FUNCTIONS | |
1233 | \f | |
1234 | /* Addressing modes, and classification of registers for them. */ | |
1235 | ||
1236 | /* Maximum number of registers that can appear in a valid memory address. */ | |
1237 | #define MAX_REGS_PER_ADDRESS 1 | |
1238 | ||
1239 | /* We have post-inc load and pre-dec,pre-inc store, | |
1240 | but only for 4 byte vals. */ | |
940da324 JL |
1241 | #define HAVE_PRE_DECREMENT 1 |
1242 | #define HAVE_PRE_INCREMENT 1 | |
1243 | #define HAVE_POST_INCREMENT 1 | |
8c5ca3b9 DE |
1244 | |
1245 | /* Recognize any constant value that is a valid address. */ | |
1246 | #define CONSTANT_ADDRESS_P(X) \ | |
1247 | (GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ | |
1248 | || GET_CODE (X) == CONST_INT || GET_CODE (X) == CONST) | |
1249 | ||
1250 | /* Nonzero if the constant value X is a legitimate general operand. | |
1251 | We don't allow (plus symbol large-constant) as the relocations can't | |
1252 | describe it. INTVAL > 32767 handles both 16 bit and 24 bit relocations. | |
1253 | We allow all CONST_DOUBLE's as the md file patterns will force the | |
1254 | constant to memory if they can't handle them. */ | |
1255 | ||
56e2e762 NC |
1256 | #define LEGITIMATE_CONSTANT_P(X) \ |
1257 | (! (GET_CODE (X) == CONST \ | |
1258 | && GET_CODE (XEXP (X, 0)) == PLUS \ | |
1259 | && GET_CODE (XEXP (XEXP (X, 0), 0)) == SYMBOL_REF \ | |
1260 | && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT \ | |
8c5ca3b9 DE |
1261 | && (unsigned HOST_WIDE_INT) INTVAL (XEXP (XEXP (X, 0), 1)) > 32767)) |
1262 | ||
1263 | /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx | |
1264 | and check its validity for a certain class. | |
1265 | We have two alternate definitions for each of them. | |
1266 | The usual definition accepts all pseudo regs; the other rejects | |
1267 | them unless they have been allocated suitable hard regs. | |
1268 | The symbol REG_OK_STRICT causes the latter definition to be used. | |
1269 | ||
1270 | Most source files want to accept pseudo regs in the hope that | |
1271 | they will get allocated to the class that the insn wants them to be in. | |
1272 | Source files for reload pass need to be strict. | |
1273 | After reload, it makes no difference, since pseudo regs have | |
1274 | been eliminated by then. */ | |
1275 | ||
1276 | #ifdef REG_OK_STRICT | |
1277 | ||
1278 | /* Nonzero if X is a hard reg that can be used as a base reg. */ | |
1279 | #define REG_OK_FOR_BASE_P(X) GPR_P (REGNO (X)) | |
1280 | /* Nonzero if X is a hard reg that can be used as an index. */ | |
1281 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) | |
1282 | ||
1283 | #else | |
1284 | ||
1285 | /* Nonzero if X is a hard reg that can be used as a base reg | |
1286 | or if it is a pseudo reg. */ | |
56e2e762 | 1287 | #define REG_OK_FOR_BASE_P(X) \ |
8c5ca3b9 DE |
1288 | (GPR_P (REGNO (X)) \ |
1289 | || (REGNO (X)) == ARG_POINTER_REGNUM \ | |
1290 | || REGNO (X) >= FIRST_PSEUDO_REGISTER) | |
1291 | /* Nonzero if X is a hard reg that can be used as an index | |
1292 | or if it is a pseudo reg. */ | |
1293 | #define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) | |
1294 | ||
1295 | #endif | |
1296 | ||
1297 | /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression | |
1298 | that is a valid memory address for an instruction. | |
1299 | The MODE argument is the machine mode for the MEM expression | |
1300 | that wants to use this address. */ | |
1301 | ||
56e2e762 NC |
1302 | /* Local to this file. */ |
1303 | #define RTX_OK_FOR_BASE_P(X) (REG_P (X) && REG_OK_FOR_BASE_P (X)) | |
8c5ca3b9 | 1304 | |
56e2e762 | 1305 | /* Local to this file. */ |
8c5ca3b9 DE |
1306 | #define RTX_OK_FOR_OFFSET_P(X) \ |
1307 | (GET_CODE (X) == CONST_INT && INT16_P (INTVAL (X))) | |
1308 | ||
56e2e762 | 1309 | /* Local to this file. */ |
5b8ae21f MM |
1310 | #define LEGITIMATE_OFFSET_ADDRESS_P(MODE, X) \ |
1311 | (GET_CODE (X) == PLUS \ | |
1312 | && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \ | |
8c5ca3b9 DE |
1313 | && RTX_OK_FOR_OFFSET_P (XEXP (X, 1))) |
1314 | ||
56e2e762 | 1315 | /* Local to this file. */ |
5b8ae21f MM |
1316 | /* For LO_SUM addresses, do not allow them if the MODE is > 1 word, |
1317 | since more than one instruction will be required. */ | |
1318 | #define LEGITIMATE_LO_SUM_ADDRESS_P(MODE, X) \ | |
1319 | (GET_CODE (X) == LO_SUM \ | |
1320 | && (MODE != BLKmode && GET_MODE_SIZE (MODE) <= UNITS_PER_WORD) \ | |
1321 | && RTX_OK_FOR_BASE_P (XEXP (X, 0)) \ | |
8c5ca3b9 DE |
1322 | && CONSTANT_P (XEXP (X, 1))) |
1323 | ||
56e2e762 NC |
1324 | /* Local to this file. */ |
1325 | /* Is this a load and increment operation. */ | |
1326 | #define LOAD_POSTINC_P(MODE, X) \ | |
1327 | (((MODE) == SImode || (MODE) == SFmode) \ | |
1328 | && GET_CODE (X) == POST_INC \ | |
1329 | && GET_CODE (XEXP (X, 0)) == REG \ | |
1330 | && RTX_OK_FOR_BASE_P (XEXP (X, 0))) | |
1331 | ||
1332 | /* Local to this file. */ | |
1333 | /* Is this a increment/decrement and store operation. */ | |
1334 | #define STORE_PREINC_PREDEC_P(MODE, X) \ | |
1335 | (((MODE) == SImode || (MODE) == SFmode) \ | |
1336 | && (GET_CODE (X) == PRE_INC || GET_CODE (X) == PRE_DEC) \ | |
1337 | && GET_CODE (XEXP (X, 0)) == REG \ | |
1338 | && RTX_OK_FOR_BASE_P (XEXP (X, 0))) | |
5b8ae21f MM |
1339 | |
1340 | #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \ | |
1341 | { if (RTX_OK_FOR_BASE_P (X)) \ | |
1342 | goto ADDR; \ | |
1343 | if (LEGITIMATE_OFFSET_ADDRESS_P ((MODE), (X))) \ | |
1344 | goto ADDR; \ | |
1345 | if (LEGITIMATE_LO_SUM_ADDRESS_P ((MODE), (X))) \ | |
1346 | goto ADDR; \ | |
56e2e762 NC |
1347 | if (LOAD_POSTINC_P ((MODE), (X))) \ |
1348 | goto ADDR; \ | |
1349 | if (STORE_PREINC_PREDEC_P ((MODE), (X))) \ | |
5b8ae21f | 1350 | goto ADDR; \ |
8c5ca3b9 DE |
1351 | } |
1352 | ||
1353 | /* Try machine-dependent ways of modifying an illegitimate address | |
1354 | to be legitimate. If we find one, return the new, valid address. | |
1355 | This macro is used in only one place: `memory_address' in explow.c. | |
1356 | ||
1357 | OLDX is the address as it was before break_out_memory_refs was called. | |
1358 | In some cases it is useful to look at this to decide what needs to be done. | |
1359 | ||
1360 | MODE and WIN are passed so that this macro can use | |
1361 | GO_IF_LEGITIMATE_ADDRESS. | |
1362 | ||
1363 | It is always safe for this macro to do nothing. It exists to recognize | |
1364 | opportunities to optimize the output. | |
1365 | ||
1366 | ??? Is there anything useful we can do here for the M32R? */ | |
1367 | ||
1368 | #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) | |
1369 | ||
1370 | /* Go to LABEL if ADDR (a legitimate address expression) | |
1371 | has an effect that depends on the machine mode it is used for. */ | |
5b8ae21f MM |
1372 | #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \ |
1373 | do { \ | |
1374 | if (GET_CODE (ADDR) == PRE_DEC \ | |
1375 | || GET_CODE (ADDR) == PRE_INC \ | |
1376 | || GET_CODE (ADDR) == POST_INC \ | |
1377 | || GET_CODE (ADDR) == LO_SUM) \ | |
1378 | goto LABEL; \ | |
8c5ca3b9 DE |
1379 | } while (0) |
1380 | \f | |
1381 | /* Condition code usage. */ | |
1382 | ||
1383 | /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE, | |
1384 | return the mode to be used for the comparison. */ | |
8c5ca3b9 | 1385 | #define SELECT_CC_MODE(OP, X, Y) \ |
2b7972b0 | 1386 | ((enum machine_mode)m32r_select_cc_mode ((int)OP, X, Y)) |
8c5ca3b9 DE |
1387 | |
1388 | /* Return non-zero if SELECT_CC_MODE will never return MODE for a | |
1389 | floating point inequality comparison. */ | |
18543a22 | 1390 | #define REVERSIBLE_CC_MODE(MODE) 1 /*???*/ |
8c5ca3b9 DE |
1391 | \f |
1392 | /* Costs. */ | |
1393 | ||
1394 | /* ??? I'm quite sure I don't understand enough of the subtleties involved | |
1395 | in choosing the right numbers to use here, but there doesn't seem to be | |
1396 | enough documentation on this. What I've done is define an insn to cost | |
1397 | 4 "units" and work from there. COSTS_N_INSNS (N) is defined as (N) * 4 - 2 | |
1398 | so that seems reasonable. Some values are supposed to be defined relative | |
1399 | to each other and thus aren't necessarily related to COSTS_N_INSNS. */ | |
1400 | ||
1401 | /* Compute the cost of computing a constant rtl expression RTX | |
1402 | whose rtx-code is CODE. The body of this macro is a portion | |
1403 | of a switch statement. If the code is computed here, | |
1404 | return it with a return statement. Otherwise, break from the switch. */ | |
1405 | /* Small integers are as cheap as registers. 4 byte values can be fetched | |
1406 | as immediate constants - let's give that the cost of an extra insn. */ | |
56e2e762 | 1407 | #define CONST_COSTS(X, CODE, OUTER_CODE) \ |
8c5ca3b9 DE |
1408 | case CONST_INT : \ |
1409 | if (INT16_P (INTVAL (X))) \ | |
1410 | return 0; \ | |
1411 | /* fall through */ \ | |
1412 | case CONST : \ | |
1413 | case LABEL_REF : \ | |
1414 | case SYMBOL_REF : \ | |
1415 | return 4; \ | |
1416 | case CONST_DOUBLE : \ | |
1417 | { \ | |
1418 | rtx high, low; \ | |
1419 | split_double (X, &high, &low); \ | |
1420 | return 4 * (!INT16_P (INTVAL (high)) \ | |
1421 | + !INT16_P (INTVAL (low))); \ | |
1422 | } | |
1423 | ||
1424 | /* Compute the cost of an address. */ | |
1425 | #define ADDRESS_COST(ADDR) m32r_address_cost (ADDR) | |
1426 | ||
1427 | /* Compute extra cost of moving data between one register class | |
1428 | and another. */ | |
cf011243 | 1429 | #define REGISTER_MOVE_COST(MODE, CLASS1, CLASS2) 2 |
8c5ca3b9 DE |
1430 | |
1431 | /* Compute the cost of moving data between registers and memory. */ | |
1432 | /* Memory is 3 times as expensive as registers. | |
1433 | ??? Is that the right way to look at it? */ | |
5b8ae21f | 1434 | #define MEMORY_MOVE_COST(MODE,CLASS,IN_P) \ |
8c5ca3b9 DE |
1435 | (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD ? 6 : 12) |
1436 | ||
1437 | /* The cost of a branch insn. */ | |
1438 | /* A value of 2 here causes GCC to avoid using branches in comparisons like | |
1439 | while (a < N && a). Branches aren't that expensive on the M32R so | |
1440 | we define this as 1. Defining it as 2 had a heavy hit in fp-bit.c. */ | |
56e2e762 | 1441 | #define BRANCH_COST ((TARGET_BRANCH_COST) ? 2 : 1) |
8c5ca3b9 DE |
1442 | |
1443 | /* Provide the costs of a rtl expression. This is in the body of a | |
1444 | switch on CODE. The purpose for the cost of MULT is to encourage | |
1445 | `synth_mult' to find a synthetic multiply when reasonable. | |
1446 | ||
1447 | If we need more than 12 insns to do a multiply, then go out-of-line, | |
1448 | since the call overhead will be < 10% of the cost of the multiply. */ | |
56e2e762 NC |
1449 | #define RTX_COSTS(X, CODE, OUTER_CODE) \ |
1450 | case MULT : \ | |
1451 | return COSTS_N_INSNS (3); \ | |
1452 | case DIV : \ | |
1453 | case UDIV : \ | |
1454 | case MOD : \ | |
1455 | case UMOD : \ | |
1456 | return COSTS_N_INSNS (10); | |
8c5ca3b9 DE |
1457 | |
1458 | /* Nonzero if access to memory by bytes is slow and undesirable. | |
1459 | For RISC chips, it means that access to memory by bytes is no | |
1460 | better than access by words when possible, so grab a whole word | |
1461 | and maybe make use of that. */ | |
1462 | #define SLOW_BYTE_ACCESS 1 | |
1463 | ||
1464 | /* Define this macro if it is as good or better to call a constant | |
1465 | function address than to call an address kept in a register. */ | |
8c5ca3b9 DE |
1466 | #define NO_FUNCTION_CSE |
1467 | ||
1468 | /* Define this macro if it is as good or better for a function to call | |
1469 | itself with an explicit address than to call an address kept in a | |
1470 | register. */ | |
8c5ca3b9 DE |
1471 | #define NO_RECURSIVE_FUNCTION_CSE |
1472 | ||
2b7972b0 MM |
1473 | /* When the `length' insn attribute is used, this macro specifies the |
1474 | value to be assigned to the address of the first insn in a | |
1475 | function. If not specified, 0 is used. */ | |
1476 | #define FIRST_INSN_ADDRESS m32r_first_insn_address () | |
1477 | ||
8c5ca3b9 DE |
1478 | \f |
1479 | /* Section selection. */ | |
1480 | ||
1481 | #define TEXT_SECTION_ASM_OP "\t.section .text" | |
1482 | #define DATA_SECTION_ASM_OP "\t.section .data" | |
1483 | #define RODATA_SECTION_ASM_OP "\t.section .rodata" | |
1484 | #define BSS_SECTION_ASM_OP "\t.section .bss" | |
1485 | #define SDATA_SECTION_ASM_OP "\t.section .sdata" | |
1486 | #define SBSS_SECTION_ASM_OP "\t.section .sbss" | |
1487 | /* This one is for svr4.h. */ | |
56e2e762 | 1488 | #undef CONST_SECTION_ASM_OP |
8c5ca3b9 DE |
1489 | #define CONST_SECTION_ASM_OP "\t.section .rodata" |
1490 | ||
1491 | /* A list of names for sections other than the standard two, which are | |
1492 | `in_text' and `in_data'. You need not define this macro | |
1493 | on a system with no other sections (that GCC needs to use). */ | |
56e2e762 | 1494 | #undef EXTRA_SECTIONS |
19652adf | 1495 | #define EXTRA_SECTIONS in_sdata, in_sbss, in_const |
8c5ca3b9 DE |
1496 | |
1497 | /* One or more functions to be defined in "varasm.c". These | |
1498 | functions should do jobs analogous to those of `text_section' and | |
1499 | `data_section', for your additional sections. Do not define this | |
1500 | macro if you do not define `EXTRA_SECTIONS'. */ | |
56e2e762 NC |
1501 | #undef EXTRA_SECTION_FUNCTIONS |
1502 | #define EXTRA_SECTION_FUNCTIONS \ | |
1503 | CONST_SECTION_FUNCTION \ | |
56e2e762 NC |
1504 | SDATA_SECTION_FUNCTION \ |
1505 | SBSS_SECTION_FUNCTION | |
8c5ca3b9 | 1506 | |
2b7972b0 | 1507 | #define SDATA_SECTION_FUNCTION \ |
8c5ca3b9 DE |
1508 | void \ |
1509 | sdata_section () \ | |
1510 | { \ | |
1511 | if (in_section != in_sdata) \ | |
1512 | { \ | |
1513 | fprintf (asm_out_file, "%s\n", SDATA_SECTION_ASM_OP); \ | |
1514 | in_section = in_sdata; \ | |
1515 | } \ | |
1516 | } \ | |
1517 | ||
2b7972b0 | 1518 | #define SBSS_SECTION_FUNCTION \ |
8c5ca3b9 DE |
1519 | void \ |
1520 | sbss_section () \ | |
1521 | { \ | |
1522 | if (in_section != in_sbss) \ | |
1523 | { \ | |
1524 | fprintf (asm_out_file, "%s\n", SBSS_SECTION_ASM_OP); \ | |
1525 | in_section = in_sbss; \ | |
1526 | } \ | |
1527 | } \ | |
1528 | ||
1529 | /* A C statement or statements to switch to the appropriate section for | |
1530 | output of EXP. You can assume that EXP is either a `VAR_DECL' node | |
1531 | or a constant of some sort. RELOC indicates whether the initial value | |
1532 | of EXP requires link-time relocations. */ | |
56e2e762 | 1533 | #undef SELECT_SECTION |
201556f0 JJ |
1534 | #define SELECT_SECTION(EXP, RELOC, ALIGN) \ |
1535 | m32r_select_section ((EXP), (RELOC)) | |
8c5ca3b9 DE |
1536 | |
1537 | /* A C statement or statements to switch to the appropriate section for | |
1538 | output of RTX in mode MODE. You can assume that RTX | |
1539 | is some kind of constant in RTL. The argument MODE is redundant | |
1540 | except in the case of a `const_int' rtx. Select the section by | |
1541 | calling `text_section' or one of the alternatives for other | |
1542 | sections. | |
1543 | ||
1544 | Do not define this macro if you put all constants in the read-only | |
1545 | data section. */ | |
1546 | ||
1547 | #undef SELECT_RTX_SECTION | |
1548 | ||
1549 | /* Define this macro if jump tables (for tablejump insns) should be | |
1550 | output in the text section, along with the assembler instructions. | |
1551 | Otherwise, the readonly data section is used. | |
1552 | This macro is irrelevant if there is no separate readonly data section. */ | |
1553 | /*#define JUMP_TABLES_IN_TEXT_SECTION*/ | |
1554 | ||
1555 | /* Define this macro if references to a symbol must be treated | |
1556 | differently depending on something about the variable or | |
1557 | function named by the symbol (such as what section it is in). | |
1558 | ||
1559 | The macro definition, if any, is executed immediately after the | |
1560 | rtl for DECL or other node is created. | |
1561 | The value of the rtl will be a `mem' whose address is a | |
1562 | `symbol_ref'. | |
1563 | ||
1564 | The usual thing for this macro to do is to store a flag in the | |
1565 | `symbol_ref' (such as `SYMBOL_REF_FLAG') or to store a modified | |
1566 | name string in the `symbol_ref' (if one bit is not enough | |
1567 | information). */ | |
1568 | ||
1569 | #define SDATA_FLAG_CHAR '@' | |
1570 | /* Small objects are recorded with no prefix for space efficiency since | |
1571 | they'll be the most common. This isn't the case if the user passes | |
1572 | -mmodel={medium|large} and one could choose to not mark symbols that | |
1573 | are the default, but that complicates things. */ | |
1574 | /*#define SMALL_FLAG_CHAR '#'*/ | |
1575 | #define MEDIUM_FLAG_CHAR '%' | |
1576 | #define LARGE_FLAG_CHAR '&' | |
1577 | ||
1578 | #define SDATA_NAME_P(NAME) (*(NAME) == SDATA_FLAG_CHAR) | |
1579 | /*#define SMALL_NAME_P(NAME) (*(NAME) == SMALL_FLAG_CHAR)*/ | |
0ebaa85d | 1580 | #define SMALL_NAME_P(NAME) (! ENCODED_NAME_P (NAME) && ! LIT_NAME_P (NAME)) |
8c5ca3b9 DE |
1581 | #define MEDIUM_NAME_P(NAME) (*(NAME) == MEDIUM_FLAG_CHAR) |
1582 | #define LARGE_NAME_P(NAME) (*(NAME) == LARGE_FLAG_CHAR) | |
0ebaa85d DE |
1583 | /* For string literals, etc. */ |
1584 | #define LIT_NAME_P(NAME) ((NAME)[0] == '*' && (NAME)[1] == '.') | |
8c5ca3b9 DE |
1585 | |
1586 | #define ENCODED_NAME_P(SYMBOL_NAME) \ | |
1587 | (SDATA_NAME_P (SYMBOL_NAME) \ | |
1588 | /*|| SMALL_NAME_P (SYMBOL_NAME)*/ \ | |
1589 | || MEDIUM_NAME_P (SYMBOL_NAME) \ | |
1590 | || LARGE_NAME_P (SYMBOL_NAME)) | |
1591 | ||
8c5ca3b9 DE |
1592 | #define ENCODE_SECTION_INFO(DECL) m32r_encode_section_info (DECL) |
1593 | ||
1594 | /* Decode SYM_NAME and store the real name part in VAR, sans | |
1595 | the characters that encode section info. Define this macro if | |
1596 | ENCODE_SECTION_INFO alters the symbol's name string. */ | |
0ebaa85d | 1597 | /* Note that we have to handle symbols like "%*start". */ |
8c5ca3b9 DE |
1598 | #define STRIP_NAME_ENCODING(VAR, SYMBOL_NAME) \ |
1599 | do { \ | |
1600 | (VAR) = (SYMBOL_NAME) + ENCODED_NAME_P (SYMBOL_NAME); \ | |
1601 | (VAR) += *(VAR) == '*'; \ | |
1602 | } while (0) | |
1603 | \f | |
1604 | /* PIC */ | |
1605 | ||
1606 | /* The register number of the register used to address a table of static | |
1607 | data addresses in memory. In some cases this register is defined by a | |
1608 | processor's ``application binary interface'' (ABI). When this macro | |
1609 | is defined, RTL is generated for this register once, as with the stack | |
1610 | pointer and frame pointer registers. If this macro is not defined, it | |
1611 | is up to the machine-dependent files to allocate such a register (if | |
1612 | necessary). */ | |
1613 | /*#define PIC_OFFSET_TABLE_REGNUM 12*/ | |
1614 | ||
1615 | /* Define this macro if the register defined by PIC_OFFSET_TABLE_REGNUM is | |
1616 | clobbered by calls. Do not define this macro if PIC_OFFSET_TABLE_REGNUM | |
1617 | is not defined. */ | |
1618 | /* This register is call-saved on the M32R. */ | |
1619 | /*#define PIC_OFFSET_TABLE_REG_CALL_CLOBBERED*/ | |
1620 | ||
1621 | /* By generating position-independent code, when two different programs (A | |
1622 | and B) share a common library (libC.a), the text of the library can be | |
1623 | shared whether or not the library is linked at the same address for both | |
1624 | programs. In some of these environments, position-independent code | |
1625 | requires not only the use of different addressing modes, but also | |
1626 | special code to enable the use of these addressing modes. | |
1627 | ||
1628 | The FINALIZE_PIC macro serves as a hook to emit these special | |
1629 | codes once the function is being compiled into assembly code, but not | |
1630 | before. (It is not done before, because in the case of compiling an | |
1631 | inline function, it would lead to multiple PIC prologues being | |
1632 | included in functions which used inline functions and were compiled to | |
1633 | assembly language.) */ | |
1634 | ||
1635 | /*#define FINALIZE_PIC m32r_finalize_pic ()*/ | |
1636 | ||
1637 | /* A C expression that is nonzero if X is a legitimate immediate | |
1638 | operand on the target machine when generating position independent code. | |
1639 | You can assume that X satisfies CONSTANT_P, so you need not | |
1640 | check this. You can also assume `flag_pic' is true, so you need not | |
1641 | check it either. You need not define this macro if all constants | |
1642 | (including SYMBOL_REF) can be immediate operands when generating | |
1643 | position independent code. */ | |
1644 | /*#define LEGITIMATE_PIC_OPERAND_P(X)*/ | |
1645 | \f | |
1646 | /* Control the assembler format that we output. */ | |
1647 | ||
1648 | /* Output at beginning of assembler file. */ | |
8c5ca3b9 DE |
1649 | #define ASM_FILE_START(FILE) m32r_asm_file_start (FILE) |
1650 | ||
1651 | /* A C string constant describing how to begin a comment in the target | |
1652 | assembler language. The compiler assumes that the comment will | |
1653 | end at the end of the line. */ | |
1654 | #define ASM_COMMENT_START ";" | |
1655 | ||
1656 | /* Output to assembler file text saying following lines | |
1657 | may contain character constants, extra white space, comments, etc. */ | |
1658 | #define ASM_APP_ON "" | |
1659 | ||
1660 | /* Output to assembler file text saying following lines | |
1661 | no longer contain unusual constructs. */ | |
1662 | #define ASM_APP_OFF "" | |
1663 | ||
1664 | /* This is how to output an assembler line defining a `char' constant. */ | |
56e2e762 NC |
1665 | #define ASM_OUTPUT_CHAR(FILE, VALUE) \ |
1666 | do \ | |
1667 | { \ | |
1668 | fprintf (FILE, "\t.byte\t"); \ | |
1669 | output_addr_const (FILE, (VALUE)); \ | |
1670 | fprintf (FILE, "\n"); \ | |
1671 | } \ | |
1672 | while (0) | |
8c5ca3b9 DE |
1673 | |
1674 | /* This is how to output an assembler line defining a `short' constant. */ | |
56e2e762 NC |
1675 | #define ASM_OUTPUT_SHORT(FILE, VALUE) \ |
1676 | do \ | |
1677 | { \ | |
1678 | fprintf (FILE, "\t.hword\t"); \ | |
1679 | output_addr_const (FILE, (VALUE)); \ | |
1680 | fprintf (FILE, "\n"); \ | |
1681 | } \ | |
1682 | while (0) | |
8c5ca3b9 DE |
1683 | |
1684 | /* This is how to output an assembler line defining an `int' constant. | |
1685 | We also handle symbol output here. */ | |
56e2e762 NC |
1686 | #define ASM_OUTPUT_INT(FILE, VALUE) \ |
1687 | do \ | |
1688 | { \ | |
1689 | fprintf (FILE, "\t.word\t"); \ | |
1690 | output_addr_const (FILE, (VALUE)); \ | |
1691 | fprintf (FILE, "\n"); \ | |
1692 | } \ | |
1693 | while (0) | |
8c5ca3b9 DE |
1694 | |
1695 | /* This is how to output an assembler line defining a `float' constant. */ | |
56e2e762 NC |
1696 | #define ASM_OUTPUT_FLOAT(FILE, VALUE) \ |
1697 | do \ | |
1698 | { \ | |
1699 | long t; \ | |
1700 | char str[30]; \ | |
1701 | REAL_VALUE_TO_TARGET_SINGLE ((VALUE), t); \ | |
1702 | REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \ | |
1703 | fprintf (FILE, "\t.word\t0x%lx %s %s\n", \ | |
1704 | t, ASM_COMMENT_START, str); \ | |
1705 | } \ | |
1706 | while (0) | |
8c5ca3b9 DE |
1707 | |
1708 | /* This is how to output an assembler line defining a `double' constant. */ | |
56e2e762 NC |
1709 | #define ASM_OUTPUT_DOUBLE(FILE, VALUE) \ |
1710 | do \ | |
1711 | { \ | |
1712 | long t[2]; \ | |
1713 | char str[30]; \ | |
1714 | REAL_VALUE_TO_TARGET_DOUBLE ((VALUE), t); \ | |
1715 | REAL_VALUE_TO_DECIMAL ((VALUE), "%.20e", str); \ | |
1716 | fprintf (FILE, "\t.word\t0x%lx %s %s\n\t.word\t0x%lx\n", \ | |
1717 | t[0], ASM_COMMENT_START, str, t[1]); \ | |
1718 | } \ | |
1719 | while (0) | |
8c5ca3b9 DE |
1720 | |
1721 | /* This is how to output an assembler line for a numeric constant byte. */ | |
56e2e762 | 1722 | #define ASM_OUTPUT_BYTE(FILE, VALUE) \ |
016c8440 | 1723 | fprintf (FILE, "%s0x%x\n", ASM_BYTE_OP, (VALUE)) |
8c5ca3b9 | 1724 | |
8c5ca3b9 DE |
1725 | /* This is how to output the definition of a user-level label named NAME, |
1726 | such as the label on a static function or variable NAME. */ | |
1727 | /* On the M32R we need to ensure the next instruction starts on a 32 bit | |
1728 | boundary [the previous insn must either be 2 16 bit insns or 1 32 bit]. */ | |
56e2e762 NC |
1729 | #define ASM_OUTPUT_LABEL(FILE, NAME) \ |
1730 | do \ | |
1731 | { \ | |
1732 | assemble_name (FILE, NAME); \ | |
1733 | fputs (":\n", FILE); \ | |
1734 | } \ | |
1735 | while (0) | |
8c5ca3b9 DE |
1736 | |
1737 | /* This is how to output a command to make the user-level label named NAME | |
1738 | defined for reference from other files. */ | |
56e2e762 NC |
1739 | #define ASM_GLOBALIZE_LABEL(FILE, NAME) \ |
1740 | do \ | |
1741 | { \ | |
1742 | fputs ("\t.global\t", FILE); \ | |
1743 | assemble_name (FILE, NAME); \ | |
1744 | fputs ("\n", FILE); \ | |
1745 | } \ | |
1746 | while (0) | |
8c5ca3b9 DE |
1747 | |
1748 | /* This is how to output a reference to a user-level label named NAME. | |
1749 | `assemble_name' uses this. */ | |
56e2e762 NC |
1750 | #undef ASM_OUTPUT_LABELREF |
1751 | #define ASM_OUTPUT_LABELREF(FILE, NAME) \ | |
1752 | do \ | |
1753 | { \ | |
1754 | const char * real_name; \ | |
1755 | STRIP_NAME_ENCODING (real_name, (NAME)); \ | |
1756 | asm_fprintf (FILE, "%U%s", real_name); \ | |
1757 | } \ | |
1758 | while (0) | |
8c5ca3b9 | 1759 | |
5f97de0a DE |
1760 | /* If -Os, don't force line number labels to begin at the beginning of |
1761 | the word; we still want the assembler to try to put things in parallel, | |
1762 | should that be possible. | |
1763 | For m32r/d, instructions are never in parallel (other than with a nop) | |
1764 | and the simulator and stub both handle a breakpoint in the middle of | |
1765 | a word so don't ever force line number labels to begin at the beginning | |
1766 | of a word. */ | |
5b8ae21f MM |
1767 | |
1768 | #undef ASM_OUTPUT_SOURCE_LINE | |
1769 | #define ASM_OUTPUT_SOURCE_LINE(file, line) \ | |
56e2e762 NC |
1770 | do \ |
1771 | { \ | |
1772 | static int sym_lineno = 1; \ | |
1773 | fprintf (file, ".stabn 68,0,%d,.LM%d-", \ | |
1774 | line, sym_lineno); \ | |
1775 | assemble_name \ | |
1776 | (file, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ | |
1777 | fprintf (file, (optimize_size || TARGET_M32R) \ | |
1778 | ? "\n\t.debugsym .LM%d\n" \ | |
1779 | : "\n.LM%d:\n", \ | |
1780 | sym_lineno); \ | |
1781 | sym_lineno += 1; \ | |
1782 | } \ | |
1783 | while (0) | |
5b8ae21f | 1784 | |
8c5ca3b9 DE |
1785 | /* Store in OUTPUT a string (made with alloca) containing |
1786 | an assembler-name for a local static variable named NAME. | |
1787 | LABELNO is an integer which is different for each call. */ | |
56e2e762 NC |
1788 | #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \ |
1789 | do \ | |
1790 | { \ | |
1791 | (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10);\ | |
1792 | sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)); \ | |
1793 | } \ | |
1794 | while (0) | |
8c5ca3b9 DE |
1795 | |
1796 | /* How to refer to registers in assembler output. | |
1797 | This sequence is indexed by compiler's hard-register-number (see above). */ | |
56e2e762 NC |
1798 | #ifndef SUBTARGET_REGISTER_NAMES |
1799 | #define SUBTARGET_REGISTER_NAMES | |
1800 | #endif | |
1801 | ||
1802 | #define REGISTER_NAMES \ | |
8c5ca3b9 DE |
1803 | { \ |
1804 | "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ | |
1805 | "r8", "r9", "r10", "r11", "r12", "fp", "lr", "sp", \ | |
56e2e762 NC |
1806 | "ap", "cbit", "a0" \ |
1807 | SUBTARGET_REGISTER_NAMES \ | |
8c5ca3b9 DE |
1808 | } |
1809 | ||
1810 | /* If defined, a C initializer for an array of structures containing | |
1811 | a name and a register number. This macro defines additional names | |
1812 | for hard registers, thus allowing the `asm' option in declarations | |
1813 | to refer to registers using alternate names. */ | |
56e2e762 NC |
1814 | #ifndef SUBTARGET_ADDITIONAL_REGISTER_NAMES |
1815 | #define SUBTARGET_ADDITIONAL_REGISTER_NAMES | |
1816 | #endif | |
1817 | ||
1818 | #define ADDITIONAL_REGISTER_NAMES \ | |
8c5ca3b9 DE |
1819 | { \ |
1820 | /*{ "gp", GP_REGNUM },*/ \ | |
1821 | { "r13", FRAME_POINTER_REGNUM }, \ | |
1822 | { "r14", RETURN_ADDR_REGNUM }, \ | |
1823 | { "r15", STACK_POINTER_REGNUM }, \ | |
56e2e762 | 1824 | SUBTARGET_ADDITIONAL_REGISTER_NAMES \ |
8c5ca3b9 DE |
1825 | } |
1826 | ||
1827 | /* A C expression which evaluates to true if CODE is a valid | |
1828 | punctuation character for use in the `PRINT_OPERAND' macro. */ | |
1829 | extern char m32r_punct_chars[]; | |
1830 | #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ | |
56e2e762 | 1831 | m32r_punct_chars[(unsigned char) (CHAR)] |
8c5ca3b9 DE |
1832 | |
1833 | /* Print operand X (an rtx) in assembler syntax to file FILE. | |
1834 | CODE is a letter or dot (`z' in `%z0') or 0 if no letter was specified. | |
1835 | For `%' followed by punctuation, CODE is the punctuation and X is null. */ | |
1836 | #define PRINT_OPERAND(FILE, X, CODE) \ | |
56e2e762 | 1837 | m32r_print_operand (FILE, X, CODE) |
8c5ca3b9 DE |
1838 | |
1839 | /* A C compound statement to output to stdio stream STREAM the | |
1840 | assembler syntax for an instruction operand that is a memory | |
1841 | reference whose address is ADDR. ADDR is an RTL expression. | |
1842 | ||
1843 | On some machines, the syntax for a symbolic address depends on | |
1844 | the section that the address refers to. On these machines, | |
1845 | define the macro `ENCODE_SECTION_INFO' to store the information | |
1846 | into the `symbol_ref', and then check for it here. */ | |
1847 | #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ | |
56e2e762 | 1848 | m32r_print_operand_address (FILE, ADDR) |
8c5ca3b9 DE |
1849 | |
1850 | /* If defined, C string expressions to be used for the `%R', `%L', | |
1851 | `%U', and `%I' options of `asm_fprintf' (see `final.c'). These | |
1852 | are useful when a single `md' file must support multiple assembler | |
1853 | formats. In that case, the various `tm.h' files can define these | |
1854 | macros differently. */ | |
1855 | #define REGISTER_PREFIX "" | |
1856 | #define LOCAL_LABEL_PREFIX ".L" | |
1857 | #define USER_LABEL_PREFIX "" | |
1858 | #define IMMEDIATE_PREFIX "#" | |
1859 | ||
1860 | /* This is how to output an element of a case-vector that is absolute. */ | |
56e2e762 NC |
1861 | #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ |
1862 | do \ | |
1863 | { \ | |
1864 | char label[30]; \ | |
1865 | ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ | |
1866 | fprintf (FILE, "\t.word\t"); \ | |
1867 | assemble_name (FILE, label); \ | |
1868 | fprintf (FILE, "\n"); \ | |
1869 | } \ | |
1870 | while (0) | |
8c5ca3b9 DE |
1871 | |
1872 | /* This is how to output an element of a case-vector that is relative. */ | |
56e2e762 NC |
1873 | #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)\ |
1874 | do \ | |
1875 | { \ | |
1876 | char label[30]; \ | |
1877 | ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ | |
1878 | fprintf (FILE, "\t.word\t"); \ | |
1879 | assemble_name (FILE, label); \ | |
1880 | fprintf (FILE, "-"); \ | |
1881 | ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ | |
1882 | assemble_name (FILE, label); \ | |
1883 | fprintf (FILE, ")\n"); \ | |
1884 | } \ | |
1885 | while (0) | |
8c5ca3b9 | 1886 | |
fc470718 R |
1887 | /* The desired alignment for the location counter at the beginning |
1888 | of a loop. */ | |
8c5ca3b9 DE |
1889 | /* On the M32R, align loops to 32 byte boundaries (cache line size) |
1890 | if -malign-loops. */ | |
fc470718 | 1891 | #define LOOP_ALIGN(LABEL) (TARGET_ALIGN_LOOPS ? 5 : 0) |
8c5ca3b9 | 1892 | |
56e2e762 NC |
1893 | /* Define this to be the maximum number of insns to move around when moving |
1894 | a loop test from the top of a loop to the bottom | |
1895 | and seeing whether to duplicate it. The default is thirty. | |
1896 | ||
1897 | Loop unrolling currently doesn't like this optimization, so | |
1898 | disable doing if we are unrolling loops and saving space. */ | |
1899 | #define LOOP_TEST_THRESHOLD (optimize_size \ | |
1900 | && !flag_unroll_loops \ | |
1901 | && !flag_unroll_all_loops ? 2 : 30) | |
1902 | ||
8c5ca3b9 DE |
1903 | /* This is how to output an assembler line |
1904 | that says to advance the location counter | |
1905 | to a multiple of 2**LOG bytes. */ | |
1906 | /* .balign is used to avoid confusion. */ | |
56e2e762 NC |
1907 | #define ASM_OUTPUT_ALIGN(FILE,LOG) \ |
1908 | do \ | |
1909 | { \ | |
1910 | if ((LOG) != 0) \ | |
1911 | fprintf (FILE, "\t.balign %d\n", 1 << (LOG)); \ | |
1912 | } \ | |
1913 | while (0) | |
8c5ca3b9 DE |
1914 | |
1915 | /* Like `ASM_OUTPUT_COMMON' except takes the required alignment as a | |
1916 | separate, explicit argument. If you define this macro, it is used in | |
1917 | place of `ASM_OUTPUT_COMMON', and gives you more flexibility in | |
1918 | handling the required alignment of the variable. The alignment is | |
1919 | specified as the number of bits. */ | |
1920 | ||
6e7b07a7 | 1921 | #define SCOMMON_ASM_OP "\t.scomm\t" |
8c5ca3b9 | 1922 | |
56e2e762 NC |
1923 | #undef ASM_OUTPUT_ALIGNED_COMMON |
1924 | #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ | |
1925 | do \ | |
8c5ca3b9 | 1926 | { \ |
56e2e762 NC |
1927 | if (! TARGET_SDATA_NONE \ |
1928 | && (SIZE) > 0 && (SIZE) <= g_switch_value) \ | |
016c8440 | 1929 | fprintf ((FILE), "%s", SCOMMON_ASM_OP); \ |
56e2e762 | 1930 | else \ |
016c8440 | 1931 | fprintf ((FILE), "%s", COMMON_ASM_OP); \ |
8c5ca3b9 | 1932 | assemble_name ((FILE), (NAME)); \ |
56e2e762 | 1933 | fprintf ((FILE), ",%u,%u\n", (SIZE), (ALIGN) / BITS_PER_UNIT); \ |
8c5ca3b9 | 1934 | } \ |
56e2e762 | 1935 | while (0) |
8c5ca3b9 DE |
1936 | |
1937 | /* Like `ASM_OUTPUT_BSS' except takes the required alignment as a | |
1938 | separate, explicit argument. If you define this macro, it is used in | |
1939 | place of `ASM_OUTPUT_BSS', and gives you more flexibility in | |
1940 | handling the required alignment of the variable. The alignment is | |
1941 | specified as the number of bits. | |
1942 | ||
1943 | For the M32R we need sbss support. */ | |
1944 | ||
56e2e762 NC |
1945 | #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ |
1946 | do \ | |
1947 | { \ | |
1948 | ASM_GLOBALIZE_LABEL (FILE, NAME); \ | |
1949 | ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN); \ | |
1950 | } \ | |
1951 | while (0) | |
8c5ca3b9 DE |
1952 | \f |
1953 | /* Debugging information. */ | |
1954 | ||
1955 | /* Generate DBX and DWARF debugging information. */ | |
56e2e762 NC |
1956 | #undef DBX_DEBUGGING_INFO |
1957 | #undef DWARF_DEBUGGING_INFO | |
1958 | #undef DWARF2_DEBUGGING_INFO | |
1959 | ||
8c5ca3b9 DE |
1960 | #define DBX_DEBUGGING_INFO |
1961 | #define DWARF_DEBUGGING_INFO | |
56e2e762 | 1962 | #define DWARF2_DEBUGGING_INFO |
8c5ca3b9 DE |
1963 | |
1964 | /* Prefer STABS (for now). */ | |
56e2e762 | 1965 | #undef PREFERRED_DEBUGGING_TYPE |
8c5ca3b9 DE |
1966 | #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG |
1967 | ||
1968 | /* How to renumber registers for dbx and gdb. */ | |
1969 | #define DBX_REGISTER_NUMBER(REGNO) (REGNO) | |
1970 | ||
1971 | /* Turn off splitting of long stabs. */ | |
1972 | #define DBX_CONTIN_LENGTH 0 | |
1973 | \f | |
1974 | /* Miscellaneous. */ | |
1975 | ||
1976 | /* Specify the machine mode that this machine uses | |
1977 | for the index in the tablejump instruction. */ | |
1978 | #define CASE_VECTOR_MODE Pmode | |
1979 | ||
18543a22 ILT |
1980 | /* Define as C expression which evaluates to nonzero if the tablejump |
1981 | instruction expects the table to contain offsets from the address of the | |
1982 | table. | |
1983 | Do not define this if the table should contain absolute addresses. */ | |
8c5ca3b9 DE |
1984 | /* It's not clear what PIC will look like or whether we want to use -fpic |
1985 | for the embedded form currently being talked about. For now require -fpic | |
1986 | to get pc relative switch tables. */ | |
18543a22 | 1987 | /*#define CASE_VECTOR_PC_RELATIVE 1 */ |
8c5ca3b9 DE |
1988 | |
1989 | /* Define if operations between registers always perform the operation | |
1990 | on the full register even if a narrower mode is specified. */ | |
1991 | #define WORD_REGISTER_OPERATIONS | |
1992 | ||
1993 | /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD | |
1994 | will either zero-extend or sign-extend. The value of this macro should | |
1995 | be the code that says which one of the two operations is implicitly | |
1996 | done, NIL if none. */ | |
1997 | #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND | |
1998 | ||
1999 | /* Specify the tree operation to be used to convert reals to integers. */ | |
2000 | #define IMPLICIT_FIX_EXPR FIX_ROUND_EXPR | |
2001 | ||
2002 | /* This is the kind of divide that is easiest to do in the general case. */ | |
2003 | #define EASY_DIV_EXPR TRUNC_DIV_EXPR | |
2004 | ||
2005 | /* Max number of bytes we can move from memory to memory | |
2006 | in one reasonably fast instruction. */ | |
2007 | #define MOVE_MAX 4 | |
2008 | ||
2009 | /* Define this to be nonzero if shift instructions ignore all but the low-order | |
2010 | few bits. */ | |
2011 | #define SHIFT_COUNT_TRUNCATED 1 | |
2012 | ||
2013 | /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits | |
2014 | is done just by pretending it is already truncated. */ | |
2015 | #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 | |
2016 | ||
2017 | /* We assume that the store-condition-codes instructions store 0 for false | |
2018 | and some other value for true. This is the value stored for true. */ | |
2019 | #define STORE_FLAG_VALUE 1 | |
2020 | ||
2021 | /* Specify the machine mode that pointers have. | |
2022 | After generation of rtl, the compiler makes no further distinction | |
2023 | between pointers and any other objects of this machine mode. */ | |
2024 | /* ??? The M32R doesn't have full 32 bit pointers, but making this PSImode has | |
56e2e762 | 2025 | it's own problems (you have to add extendpsisi2 and truncsipsi2). |
8c5ca3b9 DE |
2026 | Try to avoid it. */ |
2027 | #define Pmode SImode | |
2028 | ||
2029 | /* A function address in a call instruction. */ | |
2030 | #define FUNCTION_MODE SImode | |
8c5ca3b9 DE |
2031 | \f |
2032 | /* Define the information needed to generate branch and scc insns. This is | |
2033 | stored from the compare operation. Note that we can't use "rtx" here | |
2034 | since it hasn't been defined! */ | |
2b7972b0 MM |
2035 | extern struct rtx_def * m32r_compare_op0; |
2036 | extern struct rtx_def * m32r_compare_op1; | |
8c5ca3b9 DE |
2037 | |
2038 | /* M32R function types. */ | |
2b7972b0 MM |
2039 | enum m32r_function_type |
2040 | { | |
8c5ca3b9 DE |
2041 | M32R_FUNCTION_UNKNOWN, M32R_FUNCTION_NORMAL, M32R_FUNCTION_INTERRUPT |
2042 | }; | |
56e2e762 NC |
2043 | |
2044 | #define M32R_INTERRUPT_P(TYPE) ((TYPE) == M32R_FUNCTION_INTERRUPT) | |
2b7972b0 MM |
2045 | |
2046 | /* Define this if you have defined special-purpose predicates in the | |
2047 | file `MACHINE.c'. This macro is called within an initializer of an | |
2048 | array of structures. The first field in the structure is the name | |
2049 | of a predicate and the second field is an array of rtl codes. For | |
2050 | each predicate, list all rtl codes that can be in expressions | |
2051 | matched by the predicate. The list should have a trailing comma. */ | |
2052 | ||
2053 | #define PREDICATE_CODES \ | |
2054 | { "conditional_move_operand", { REG, SUBREG, CONST_INT }}, \ | |
2055 | { "carry_compare_operand", { EQ, NE }}, \ | |
2056 | { "eqne_comparison_operator", { EQ, NE }}, \ | |
2057 | { "signed_comparison_operator", { EQ, NE, LT, LE, GT, GE }}, \ | |
2058 | { "move_dest_operand", { REG, SUBREG, MEM }}, \ | |
2059 | { "move_src_operand", { REG, SUBREG, MEM, CONST_INT, \ | |
2060 | CONST_DOUBLE, LABEL_REF, CONST, \ | |
2061 | SYMBOL_REF }}, \ | |
2062 | { "move_double_src_operand", { REG, SUBREG, MEM, CONST_INT, \ | |
2063 | CONST_DOUBLE }}, \ | |
2064 | { "two_insn_const_operand", { CONST_INT }}, \ | |
2065 | { "symbolic_operand", { SYMBOL_REF, LABEL_REF, CONST }}, \ | |
56e2e762 NC |
2066 | { "seth_add3_operand", { SYMBOL_REF, LABEL_REF, CONST }}, \ |
2067 | { "int8_operand", { CONST_INT }}, \ | |
2068 | { "uint16_operand", { CONST_INT }}, \ | |
2b7972b0 MM |
2069 | { "reg_or_int16_operand", { REG, SUBREG, CONST_INT }}, \ |
2070 | { "reg_or_uint16_operand", { REG, SUBREG, CONST_INT }}, \ | |
2071 | { "reg_or_cmp_int16_operand", { REG, SUBREG, CONST_INT }}, \ | |
56e2e762 | 2072 | { "reg_or_eq_int16_operand", { REG, SUBREG, CONST_INT }}, \ |
2b7972b0 MM |
2073 | { "cmp_int16_operand", { CONST_INT }}, \ |
2074 | { "call_address_operand", { SYMBOL_REF, LABEL_REF, CONST }}, \ | |
56e2e762 | 2075 | { "extend_operand", { REG, SUBREG, MEM }}, \ |
2b7972b0 | 2076 | { "small_insn_p", { INSN, CALL_INSN, JUMP_INSN }}, \ |
d2a73f8e | 2077 | { "m32r_block_immediate_operand",{ CONST_INT }}, \ |
997718c7 RH |
2078 | { "large_insn_p", { INSN, CALL_INSN, JUMP_INSN }}, \ |
2079 | { "seth_add3_operand", { SYMBOL_REF, LABEL_REF, CONST }}, | |
2b7972b0 | 2080 |