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config.gcc: Add mips*-mti-linux* target Handle with_synci like other options.
[gcc.git] / gcc / config / mips / mips.h
1 /* Definitions of target machine for GNU compiler. MIPS version.
2 Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011
4 2012
5 Free Software Foundation, Inc.
6 Contributed by A. Lichnewsky (lich@inria.inria.fr).
7 Changed by Michael Meissner (meissner@osf.org).
8 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
9 Brendan Eich (brendan@microunity.com).
10
11 This file is part of GCC.
12
13 GCC is free software; you can redistribute it and/or modify
14 it under the terms of the GNU General Public License as published by
15 the Free Software Foundation; either version 3, or (at your option)
16 any later version.
17
18 GCC is distributed in the hope that it will be useful,
19 but WITHOUT ANY WARRANTY; without even the implied warranty of
20 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 GNU General Public License for more details.
22
23 You should have received a copy of the GNU General Public License
24 along with GCC; see the file COPYING3. If not see
25 <http://www.gnu.org/licenses/>. */
26
27
28 #include "config/vxworks-dummy.h"
29
30 #ifdef GENERATOR_FILE
31 /* This is used in some insn conditions, so needs to be declared, but
32 does not need to be defined. */
33 extern int target_flags_explicit;
34 #endif
35
36 /* MIPS external variables defined in mips.c. */
37
38 /* Which ABI to use. ABI_32 (original 32, or o32), ABI_N32 (n32),
39 ABI_64 (n64) are all defined by SGI. ABI_O64 is o32 extended
40 to work on a 64-bit machine. */
41
42 #define ABI_32 0
43 #define ABI_N32 1
44 #define ABI_64 2
45 #define ABI_EABI 3
46 #define ABI_O64 4
47
48 /* Masks that affect tuning.
49
50 PTF_AVOID_BRANCHLIKELY
51 Set if it is usually not profitable to use branch-likely instructions
52 for this target, typically because the branches are always predicted
53 taken and so incur a large overhead when not taken. */
54 #define PTF_AVOID_BRANCHLIKELY 0x1
55
56 /* Information about one recognized processor. Defined here for the
57 benefit of TARGET_CPU_CPP_BUILTINS. */
58 struct mips_cpu_info {
59 /* The 'canonical' name of the processor as far as GCC is concerned.
60 It's typically a manufacturer's prefix followed by a numerical
61 designation. It should be lowercase. */
62 const char *name;
63
64 /* The internal processor number that most closely matches this
65 entry. Several processors can have the same value, if there's no
66 difference between them from GCC's point of view. */
67 enum processor cpu;
68
69 /* The ISA level that the processor implements. */
70 int isa;
71
72 /* A mask of PTF_* values. */
73 unsigned int tune_flags;
74 };
75
76 #include "config/mips/mips-opts.h"
77
78 /* Macros to silence warnings about numbers being signed in traditional
79 C and unsigned in ISO C when compiled on 32-bit hosts. */
80
81 #define BITMASK_HIGH (((unsigned long)1) << 31) /* 0x80000000 */
82 #define BITMASK_UPPER16 ((unsigned long)0xffff << 16) /* 0xffff0000 */
83 #define BITMASK_LOWER16 ((unsigned long)0xffff) /* 0x0000ffff */
84
85 \f
86 /* Run-time compilation parameters selecting different hardware subsets. */
87
88 /* True if we are generating position-independent VxWorks RTP code. */
89 #define TARGET_RTP_PIC (TARGET_VXWORKS_RTP && flag_pic)
90
91 /* True if the output file is marked as ".abicalls; .option pic0"
92 (-call_nonpic). */
93 #define TARGET_ABICALLS_PIC0 \
94 (TARGET_ABSOLUTE_ABICALLS && TARGET_PLT)
95
96 /* True if the output file is marked as ".abicalls; .option pic2" (-KPIC). */
97 #define TARGET_ABICALLS_PIC2 \
98 (TARGET_ABICALLS && !TARGET_ABICALLS_PIC0)
99
100 /* True if the call patterns should be split into a jalr followed by
101 an instruction to restore $gp. It is only safe to split the load
102 from the call when every use of $gp is explicit.
103
104 See mips_must_initialize_gp_p for details about how we manage the
105 global pointer. */
106
107 #define TARGET_SPLIT_CALLS \
108 (TARGET_EXPLICIT_RELOCS && TARGET_CALL_CLOBBERED_GP && epilogue_completed)
109
110 /* True if we're generating a form of -mabicalls in which we can use
111 operators like %hi and %lo to refer to locally-binding symbols.
112 We can only do this for -mno-shared, and only then if we can use
113 relocation operations instead of assembly macros. It isn't really
114 worth using absolute sequences for 64-bit symbols because GOT
115 accesses are so much shorter. */
116
117 #define TARGET_ABSOLUTE_ABICALLS \
118 (TARGET_ABICALLS \
119 && !TARGET_SHARED \
120 && TARGET_EXPLICIT_RELOCS \
121 && !ABI_HAS_64BIT_SYMBOLS)
122
123 /* True if we can optimize sibling calls. For simplicity, we only
124 handle cases in which call_insn_operand will reject invalid
125 sibcall addresses. There are two cases in which this isn't true:
126
127 - TARGET_MIPS16. call_insn_operand accepts constant addresses
128 but there is no direct jump instruction. It isn't worth
129 using sibling calls in this case anyway; they would usually
130 be longer than normal calls.
131
132 - TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS. call_insn_operand
133 accepts global constants, but all sibcalls must be indirect. */
134 #define TARGET_SIBCALLS \
135 (!TARGET_MIPS16 && (!TARGET_USE_GOT || TARGET_EXPLICIT_RELOCS))
136
137 /* True if we need to use a global offset table to access some symbols. */
138 #define TARGET_USE_GOT (TARGET_ABICALLS || TARGET_RTP_PIC)
139
140 /* True if TARGET_USE_GOT and if $gp is a call-clobbered register. */
141 #define TARGET_CALL_CLOBBERED_GP (TARGET_ABICALLS && TARGET_OLDABI)
142
143 /* True if TARGET_USE_GOT and if $gp is a call-saved register. */
144 #define TARGET_CALL_SAVED_GP (TARGET_USE_GOT && !TARGET_CALL_CLOBBERED_GP)
145
146 /* True if we should use .cprestore to store to the cprestore slot.
147
148 We continue to use .cprestore for explicit-reloc code so that JALs
149 inside inline asms will work correctly. */
150 #define TARGET_CPRESTORE_DIRECTIVE \
151 (TARGET_ABICALLS_PIC2 && !TARGET_MIPS16)
152
153 /* True if we can use the J and JAL instructions. */
154 #define TARGET_ABSOLUTE_JUMPS \
155 (!flag_pic || TARGET_ABSOLUTE_ABICALLS)
156
157 /* True if indirect calls must use register class PIC_FN_ADDR_REG.
158 This is true for both the PIC and non-PIC VxWorks RTP modes. */
159 #define TARGET_USE_PIC_FN_ADDR_REG (TARGET_ABICALLS || TARGET_VXWORKS_RTP)
160
161 /* True if .gpword or .gpdword should be used for switch tables. */
162 #define TARGET_GPWORD \
163 (TARGET_ABICALLS && !TARGET_ABSOLUTE_ABICALLS)
164
165 /* True if the output must have a writable .eh_frame.
166 See ASM_PREFERRED_EH_DATA_FORMAT for details. */
167 #ifdef HAVE_LD_PERSONALITY_RELAXATION
168 #define TARGET_WRITABLE_EH_FRAME 0
169 #else
170 #define TARGET_WRITABLE_EH_FRAME (flag_pic && TARGET_SHARED)
171 #endif
172
173 /* Test the assembler to set ISA_HAS_DSP_MULT to DSP Rev 1 or 2. */
174 #ifdef HAVE_AS_DSPR1_MULT
175 #define ISA_HAS_DSP_MULT ISA_HAS_DSP
176 #else
177 #define ISA_HAS_DSP_MULT ISA_HAS_DSPR2
178 #endif
179
180 /* Generate mips16 code */
181 #define TARGET_MIPS16 ((target_flags & MASK_MIPS16) != 0)
182 /* Generate mips16e code. Default 16bit ASE for mips32* and mips64* */
183 #define GENERATE_MIPS16E (TARGET_MIPS16 && mips_isa >= 32)
184 /* Generate mips16e register save/restore sequences. */
185 #define GENERATE_MIPS16E_SAVE_RESTORE (GENERATE_MIPS16E && mips_abi == ABI_32)
186
187 /* True if we're generating a form of MIPS16 code in which general
188 text loads are allowed. */
189 #define TARGET_MIPS16_TEXT_LOADS \
190 (TARGET_MIPS16 && mips_code_readable == CODE_READABLE_YES)
191
192 /* True if we're generating a form of MIPS16 code in which PC-relative
193 loads are allowed. */
194 #define TARGET_MIPS16_PCREL_LOADS \
195 (TARGET_MIPS16 && mips_code_readable >= CODE_READABLE_PCREL)
196
197 /* Generic ISA defines. */
198 #define ISA_MIPS1 (mips_isa == 1)
199 #define ISA_MIPS2 (mips_isa == 2)
200 #define ISA_MIPS3 (mips_isa == 3)
201 #define ISA_MIPS4 (mips_isa == 4)
202 #define ISA_MIPS32 (mips_isa == 32)
203 #define ISA_MIPS32R2 (mips_isa == 33)
204 #define ISA_MIPS64 (mips_isa == 64)
205 #define ISA_MIPS64R2 (mips_isa == 65)
206
207 /* Architecture target defines. */
208 #define TARGET_LOONGSON_2E (mips_arch == PROCESSOR_LOONGSON_2E)
209 #define TARGET_LOONGSON_2F (mips_arch == PROCESSOR_LOONGSON_2F)
210 #define TARGET_LOONGSON_2EF (TARGET_LOONGSON_2E || TARGET_LOONGSON_2F)
211 #define TARGET_LOONGSON_3A (mips_arch == PROCESSOR_LOONGSON_3A)
212 #define TARGET_MIPS3900 (mips_arch == PROCESSOR_R3900)
213 #define TARGET_MIPS4000 (mips_arch == PROCESSOR_R4000)
214 #define TARGET_MIPS4120 (mips_arch == PROCESSOR_R4120)
215 #define TARGET_MIPS4130 (mips_arch == PROCESSOR_R4130)
216 #define TARGET_MIPS5400 (mips_arch == PROCESSOR_R5400)
217 #define TARGET_MIPS5500 (mips_arch == PROCESSOR_R5500)
218 #define TARGET_MIPS7000 (mips_arch == PROCESSOR_R7000)
219 #define TARGET_MIPS9000 (mips_arch == PROCESSOR_R9000)
220 #define TARGET_OCTEON (mips_arch == PROCESSOR_OCTEON \
221 || mips_arch == PROCESSOR_OCTEON2)
222 #define TARGET_OCTEON2 (mips_arch == PROCESSOR_OCTEON2)
223 #define TARGET_SB1 (mips_arch == PROCESSOR_SB1 \
224 || mips_arch == PROCESSOR_SB1A)
225 #define TARGET_SR71K (mips_arch == PROCESSOR_SR71000)
226 #define TARGET_XLP (mips_arch == PROCESSOR_XLP)
227
228 /* Scheduling target defines. */
229 #define TUNE_20KC (mips_tune == PROCESSOR_20KC)
230 #define TUNE_24K (mips_tune == PROCESSOR_24KC \
231 || mips_tune == PROCESSOR_24KF2_1 \
232 || mips_tune == PROCESSOR_24KF1_1)
233 #define TUNE_74K (mips_tune == PROCESSOR_74KC \
234 || mips_tune == PROCESSOR_74KF2_1 \
235 || mips_tune == PROCESSOR_74KF1_1 \
236 || mips_tune == PROCESSOR_74KF3_2)
237 #define TUNE_LOONGSON_2EF (mips_tune == PROCESSOR_LOONGSON_2E \
238 || mips_tune == PROCESSOR_LOONGSON_2F)
239 #define TUNE_LOONGSON_3A (mips_tune == PROCESSOR_LOONGSON_3A)
240 #define TUNE_MIPS3000 (mips_tune == PROCESSOR_R3000)
241 #define TUNE_MIPS3900 (mips_tune == PROCESSOR_R3900)
242 #define TUNE_MIPS4000 (mips_tune == PROCESSOR_R4000)
243 #define TUNE_MIPS4120 (mips_tune == PROCESSOR_R4120)
244 #define TUNE_MIPS4130 (mips_tune == PROCESSOR_R4130)
245 #define TUNE_MIPS5000 (mips_tune == PROCESSOR_R5000)
246 #define TUNE_MIPS5400 (mips_tune == PROCESSOR_R5400)
247 #define TUNE_MIPS5500 (mips_tune == PROCESSOR_R5500)
248 #define TUNE_MIPS6000 (mips_tune == PROCESSOR_R6000)
249 #define TUNE_MIPS7000 (mips_tune == PROCESSOR_R7000)
250 #define TUNE_MIPS9000 (mips_tune == PROCESSOR_R9000)
251 #define TUNE_OCTEON (mips_tune == PROCESSOR_OCTEON \
252 || mips_tune == PROCESSOR_OCTEON2)
253 #define TUNE_SB1 (mips_tune == PROCESSOR_SB1 \
254 || mips_tune == PROCESSOR_SB1A)
255
256 /* Whether vector modes and intrinsics for ST Microelectronics
257 Loongson-2E/2F processors should be enabled. In o32 pairs of
258 floating-point registers provide 64-bit values. */
259 #define TARGET_LOONGSON_VECTORS (TARGET_HARD_FLOAT_ABI \
260 && (TARGET_LOONGSON_2EF \
261 || TARGET_LOONGSON_3A))
262
263 /* True if the pre-reload scheduler should try to create chains of
264 multiply-add or multiply-subtract instructions. For example,
265 suppose we have:
266
267 t1 = a * b
268 t2 = t1 + c * d
269 t3 = e * f
270 t4 = t3 - g * h
271
272 t1 will have a higher priority than t2 and t3 will have a higher
273 priority than t4. However, before reload, there is no dependence
274 between t1 and t3, and they can often have similar priorities.
275 The scheduler will then tend to prefer:
276
277 t1 = a * b
278 t3 = e * f
279 t2 = t1 + c * d
280 t4 = t3 - g * h
281
282 which stops us from making full use of macc/madd-style instructions.
283 This sort of situation occurs frequently in Fourier transforms and
284 in unrolled loops.
285
286 To counter this, the TUNE_MACC_CHAINS code will reorder the ready
287 queue so that chained multiply-add and multiply-subtract instructions
288 appear ahead of any other instruction that is likely to clobber lo.
289 In the example above, if t2 and t3 become ready at the same time,
290 the code ensures that t2 is scheduled first.
291
292 Multiply-accumulate instructions are a bigger win for some targets
293 than others, so this macro is defined on an opt-in basis. */
294 #define TUNE_MACC_CHAINS (TUNE_MIPS5500 \
295 || TUNE_MIPS4120 \
296 || TUNE_MIPS4130 \
297 || TUNE_24K)
298
299 #define TARGET_OLDABI (mips_abi == ABI_32 || mips_abi == ABI_O64)
300 #define TARGET_NEWABI (mips_abi == ABI_N32 || mips_abi == ABI_64)
301
302 /* TARGET_HARD_FLOAT and TARGET_SOFT_FLOAT reflect whether the FPU is
303 directly accessible, while the command-line options select
304 TARGET_HARD_FLOAT_ABI and TARGET_SOFT_FLOAT_ABI to reflect the ABI
305 in use. */
306 #define TARGET_HARD_FLOAT (TARGET_HARD_FLOAT_ABI && !TARGET_MIPS16)
307 #define TARGET_SOFT_FLOAT (TARGET_SOFT_FLOAT_ABI || TARGET_MIPS16)
308
309 /* False if SC acts as a memory barrier with respect to itself,
310 otherwise a SYNC will be emitted after SC for atomic operations
311 that require ordering between the SC and following loads and
312 stores. It does not tell anything about ordering of loads and
313 stores prior to and following the SC, only about the SC itself and
314 those loads and stores follow it. */
315 #define TARGET_SYNC_AFTER_SC (!TARGET_OCTEON && !TARGET_XLP)
316
317 /* Define preprocessor macros for the -march and -mtune options.
318 PREFIX is either _MIPS_ARCH or _MIPS_TUNE, INFO is the selected
319 processor. If INFO's canonical name is "foo", define PREFIX to
320 be "foo", and define an additional macro PREFIX_FOO. */
321 #define MIPS_CPP_SET_PROCESSOR(PREFIX, INFO) \
322 do \
323 { \
324 char *macro, *p; \
325 \
326 macro = concat ((PREFIX), "_", (INFO)->name, NULL); \
327 for (p = macro; *p != 0; p++) \
328 if (*p == '+') \
329 *p = 'P'; \
330 else \
331 *p = TOUPPER (*p); \
332 \
333 builtin_define (macro); \
334 builtin_define_with_value ((PREFIX), (INFO)->name, 1); \
335 free (macro); \
336 } \
337 while (0)
338
339 /* Target CPU builtins. */
340 #define TARGET_CPU_CPP_BUILTINS() \
341 do \
342 { \
343 builtin_assert ("machine=mips"); \
344 builtin_assert ("cpu=mips"); \
345 builtin_define ("__mips__"); \
346 builtin_define ("_mips"); \
347 \
348 /* We do this here because __mips is defined below and so we \
349 can't use builtin_define_std. We don't ever want to define \
350 "mips" for VxWorks because some of the VxWorks headers \
351 construct include filenames from a root directory macro, \
352 an architecture macro and a filename, where the architecture \
353 macro expands to 'mips'. If we define 'mips' to 1, the \
354 architecture macro expands to 1 as well. */ \
355 if (!flag_iso && !TARGET_VXWORKS) \
356 builtin_define ("mips"); \
357 \
358 if (TARGET_64BIT) \
359 builtin_define ("__mips64"); \
360 \
361 /* Treat _R3000 and _R4000 like register-size \
362 defines, which is how they've historically \
363 been used. */ \
364 if (TARGET_64BIT) \
365 { \
366 builtin_define_std ("R4000"); \
367 builtin_define ("_R4000"); \
368 } \
369 else \
370 { \
371 builtin_define_std ("R3000"); \
372 builtin_define ("_R3000"); \
373 } \
374 \
375 if (TARGET_FLOAT64) \
376 builtin_define ("__mips_fpr=64"); \
377 else \
378 builtin_define ("__mips_fpr=32"); \
379 \
380 if (mips_base_mips16) \
381 builtin_define ("__mips16"); \
382 \
383 if (TARGET_MIPS3D) \
384 builtin_define ("__mips3d"); \
385 \
386 if (TARGET_SMARTMIPS) \
387 builtin_define ("__mips_smartmips"); \
388 \
389 if (TARGET_MCU) \
390 builtin_define ("__mips_mcu"); \
391 \
392 if (TARGET_DSP) \
393 { \
394 builtin_define ("__mips_dsp"); \
395 if (TARGET_DSPR2) \
396 { \
397 builtin_define ("__mips_dspr2"); \
398 builtin_define ("__mips_dsp_rev=2"); \
399 } \
400 else \
401 builtin_define ("__mips_dsp_rev=1"); \
402 } \
403 \
404 MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \
405 MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \
406 \
407 if (ISA_MIPS1) \
408 { \
409 builtin_define ("__mips=1"); \
410 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS1"); \
411 } \
412 else if (ISA_MIPS2) \
413 { \
414 builtin_define ("__mips=2"); \
415 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS2"); \
416 } \
417 else if (ISA_MIPS3) \
418 { \
419 builtin_define ("__mips=3"); \
420 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS3"); \
421 } \
422 else if (ISA_MIPS4) \
423 { \
424 builtin_define ("__mips=4"); \
425 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS4"); \
426 } \
427 else if (ISA_MIPS32) \
428 { \
429 builtin_define ("__mips=32"); \
430 builtin_define ("__mips_isa_rev=1"); \
431 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
432 } \
433 else if (ISA_MIPS32R2) \
434 { \
435 builtin_define ("__mips=32"); \
436 builtin_define ("__mips_isa_rev=2"); \
437 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
438 } \
439 else if (ISA_MIPS64) \
440 { \
441 builtin_define ("__mips=64"); \
442 builtin_define ("__mips_isa_rev=1"); \
443 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
444 } \
445 else if (ISA_MIPS64R2) \
446 { \
447 builtin_define ("__mips=64"); \
448 builtin_define ("__mips_isa_rev=2"); \
449 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
450 } \
451 \
452 switch (mips_abi) \
453 { \
454 case ABI_32: \
455 builtin_define ("_ABIO32=1"); \
456 builtin_define ("_MIPS_SIM=_ABIO32"); \
457 break; \
458 \
459 case ABI_N32: \
460 builtin_define ("_ABIN32=2"); \
461 builtin_define ("_MIPS_SIM=_ABIN32"); \
462 break; \
463 \
464 case ABI_64: \
465 builtin_define ("_ABI64=3"); \
466 builtin_define ("_MIPS_SIM=_ABI64"); \
467 break; \
468 \
469 case ABI_O64: \
470 builtin_define ("_ABIO64=4"); \
471 builtin_define ("_MIPS_SIM=_ABIO64"); \
472 break; \
473 } \
474 \
475 builtin_define_with_int_value ("_MIPS_SZINT", INT_TYPE_SIZE); \
476 builtin_define_with_int_value ("_MIPS_SZLONG", LONG_TYPE_SIZE); \
477 builtin_define_with_int_value ("_MIPS_SZPTR", POINTER_SIZE); \
478 builtin_define_with_int_value ("_MIPS_FPSET", \
479 32 / MAX_FPRS_PER_FMT); \
480 \
481 /* These defines reflect the ABI in use, not whether the \
482 FPU is directly accessible. */ \
483 if (TARGET_NO_FLOAT) \
484 builtin_define ("__mips_no_float"); \
485 else if (TARGET_HARD_FLOAT_ABI) \
486 builtin_define ("__mips_hard_float"); \
487 else \
488 builtin_define ("__mips_soft_float"); \
489 \
490 if (TARGET_SINGLE_FLOAT) \
491 builtin_define ("__mips_single_float"); \
492 \
493 if (TARGET_PAIRED_SINGLE_FLOAT) \
494 builtin_define ("__mips_paired_single_float"); \
495 \
496 if (TARGET_BIG_ENDIAN) \
497 { \
498 builtin_define_std ("MIPSEB"); \
499 builtin_define ("_MIPSEB"); \
500 } \
501 else \
502 { \
503 builtin_define_std ("MIPSEL"); \
504 builtin_define ("_MIPSEL"); \
505 } \
506 \
507 /* Whether calls should go through $25. The separate __PIC__ \
508 macro indicates whether abicalls code might use a GOT. */ \
509 if (TARGET_ABICALLS) \
510 builtin_define ("__mips_abicalls"); \
511 \
512 /* Whether Loongson vector modes are enabled. */ \
513 if (TARGET_LOONGSON_VECTORS) \
514 builtin_define ("__mips_loongson_vector_rev"); \
515 \
516 /* Historical Octeon macro. */ \
517 if (TARGET_OCTEON) \
518 builtin_define ("__OCTEON__"); \
519 \
520 if (TARGET_SYNCI) \
521 builtin_define ("__mips_synci"); \
522 \
523 /* Macros dependent on the C dialect. */ \
524 if (preprocessing_asm_p ()) \
525 { \
526 builtin_define_std ("LANGUAGE_ASSEMBLY"); \
527 builtin_define ("_LANGUAGE_ASSEMBLY"); \
528 } \
529 else if (c_dialect_cxx ()) \
530 { \
531 builtin_define ("_LANGUAGE_C_PLUS_PLUS"); \
532 builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \
533 builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \
534 } \
535 else \
536 { \
537 builtin_define_std ("LANGUAGE_C"); \
538 builtin_define ("_LANGUAGE_C"); \
539 } \
540 if (c_dialect_objc ()) \
541 { \
542 builtin_define ("_LANGUAGE_OBJECTIVE_C"); \
543 builtin_define ("__LANGUAGE_OBJECTIVE_C"); \
544 /* Bizarre, but retained for backwards compatibility. */ \
545 builtin_define_std ("LANGUAGE_C"); \
546 builtin_define ("_LANGUAGE_C"); \
547 } \
548 \
549 if (mips_abi == ABI_EABI) \
550 builtin_define ("__mips_eabi"); \
551 \
552 if (TARGET_CACHE_BUILTIN) \
553 builtin_define ("__GCC_HAVE_BUILTIN_MIPS_CACHE"); \
554 } \
555 while (0)
556
557 /* Default target_flags if no switches are specified */
558
559 #ifndef TARGET_DEFAULT
560 #define TARGET_DEFAULT 0
561 #endif
562
563 #ifndef TARGET_CPU_DEFAULT
564 #define TARGET_CPU_DEFAULT 0
565 #endif
566
567 #ifndef TARGET_ENDIAN_DEFAULT
568 #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN
569 #endif
570
571 #ifndef TARGET_FP_EXCEPTIONS_DEFAULT
572 #define TARGET_FP_EXCEPTIONS_DEFAULT MASK_FP_EXCEPTIONS
573 #endif
574
575 #ifdef IN_LIBGCC2
576 #undef TARGET_64BIT
577 /* Make this compile time constant for libgcc2 */
578 #ifdef __mips64
579 #define TARGET_64BIT 1
580 #else
581 #define TARGET_64BIT 0
582 #endif
583 #endif /* IN_LIBGCC2 */
584
585 /* Force the call stack unwinders in unwind.inc not to be MIPS16 code
586 when compiled with hardware floating point. This is because MIPS16
587 code cannot save and restore the floating-point registers, which is
588 important if in a mixed MIPS16/non-MIPS16 environment. */
589
590 #ifdef IN_LIBGCC2
591 #if __mips_hard_float
592 #define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((__nomips16__))
593 #endif
594 #endif /* IN_LIBGCC2 */
595
596 #define TARGET_LIBGCC_SDATA_SECTION ".sdata"
597
598 #ifndef MULTILIB_ENDIAN_DEFAULT
599 #if TARGET_ENDIAN_DEFAULT == 0
600 #define MULTILIB_ENDIAN_DEFAULT "EL"
601 #else
602 #define MULTILIB_ENDIAN_DEFAULT "EB"
603 #endif
604 #endif
605
606 #ifndef MULTILIB_ISA_DEFAULT
607 # if MIPS_ISA_DEFAULT == 1
608 # define MULTILIB_ISA_DEFAULT "mips1"
609 # else
610 # if MIPS_ISA_DEFAULT == 2
611 # define MULTILIB_ISA_DEFAULT "mips2"
612 # else
613 # if MIPS_ISA_DEFAULT == 3
614 # define MULTILIB_ISA_DEFAULT "mips3"
615 # else
616 # if MIPS_ISA_DEFAULT == 4
617 # define MULTILIB_ISA_DEFAULT "mips4"
618 # else
619 # if MIPS_ISA_DEFAULT == 32
620 # define MULTILIB_ISA_DEFAULT "mips32"
621 # else
622 # if MIPS_ISA_DEFAULT == 33
623 # define MULTILIB_ISA_DEFAULT "mips32r2"
624 # else
625 # if MIPS_ISA_DEFAULT == 64
626 # define MULTILIB_ISA_DEFAULT "mips64"
627 # else
628 # if MIPS_ISA_DEFAULT == 65
629 # define MULTILIB_ISA_DEFAULT "mips64r2"
630 # else
631 # define MULTILIB_ISA_DEFAULT "mips1"
632 # endif
633 # endif
634 # endif
635 # endif
636 # endif
637 # endif
638 # endif
639 # endif
640 #endif
641
642 #ifndef MIPS_ABI_DEFAULT
643 #define MIPS_ABI_DEFAULT ABI_32
644 #endif
645
646 /* Use the most portable ABI flag for the ASM specs. */
647
648 #if MIPS_ABI_DEFAULT == ABI_32
649 #define MULTILIB_ABI_DEFAULT "mabi=32"
650 #endif
651
652 #if MIPS_ABI_DEFAULT == ABI_O64
653 #define MULTILIB_ABI_DEFAULT "mabi=o64"
654 #endif
655
656 #if MIPS_ABI_DEFAULT == ABI_N32
657 #define MULTILIB_ABI_DEFAULT "mabi=n32"
658 #endif
659
660 #if MIPS_ABI_DEFAULT == ABI_64
661 #define MULTILIB_ABI_DEFAULT "mabi=64"
662 #endif
663
664 #if MIPS_ABI_DEFAULT == ABI_EABI
665 #define MULTILIB_ABI_DEFAULT "mabi=eabi"
666 #endif
667
668 #ifndef MULTILIB_DEFAULTS
669 #define MULTILIB_DEFAULTS \
670 { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT }
671 #endif
672
673 /* We must pass -EL to the linker by default for little endian embedded
674 targets using linker scripts with a OUTPUT_FORMAT line. Otherwise, the
675 linker will default to using big-endian output files. The OUTPUT_FORMAT
676 line must be in the linker script, otherwise -EB/-EL will not work. */
677
678 #ifndef ENDIAN_SPEC
679 #if TARGET_ENDIAN_DEFAULT == 0
680 #define ENDIAN_SPEC "%{!EB:%{!meb:-EL}} %{EB|meb:-EB}"
681 #else
682 #define ENDIAN_SPEC "%{!EL:%{!mel:-EB}} %{EL|mel:-EL}"
683 #endif
684 #endif
685
686 /* A spec condition that matches all non-mips16 -mips arguments. */
687
688 #define MIPS_ISA_LEVEL_OPTION_SPEC \
689 "mips1|mips2|mips3|mips4|mips32*|mips64*"
690
691 /* A spec condition that matches all non-mips16 architecture arguments. */
692
693 #define MIPS_ARCH_OPTION_SPEC \
694 MIPS_ISA_LEVEL_OPTION_SPEC "|march=*"
695
696 /* A spec that infers a -mips argument from an -march argument,
697 or injects the default if no architecture is specified. */
698
699 #define MIPS_ISA_LEVEL_SPEC \
700 "%{" MIPS_ISA_LEVEL_OPTION_SPEC ":;: \
701 %{march=mips1|march=r2000|march=r3000|march=r3900:-mips1} \
702 %{march=mips2|march=r6000:-mips2} \
703 %{march=mips3|march=r4*|march=vr4*|march=orion|march=loongson2*:-mips3} \
704 %{march=mips4|march=r8000|march=vr5*|march=rm7000|march=rm9000 \
705 |march=r10000|march=r12000|march=r14000|march=r16000:-mips4} \
706 %{march=mips32|march=4kc|march=4km|march=4kp|march=4ksc:-mips32} \
707 %{march=mips32r2|march=m4k|march=4ke*|march=4ksd|march=24k* \
708 |march=34k*|march=74k*|march=1004k*: -mips32r2} \
709 %{march=mips64|march=5k*|march=20k*|march=sb1*|march=sr71000 \
710 |march=xlr|march=loongson3a: -mips64} \
711 %{march=mips64r2|march=octeon|march=xlp: -mips64r2} \
712 %{!march=*: -" MULTILIB_ISA_DEFAULT "}}"
713
714 /* A spec that infers a -mhard-float or -msoft-float setting from an
715 -march argument. Note that soft-float and hard-float code are not
716 link-compatible. */
717
718 #define MIPS_ARCH_FLOAT_SPEC \
719 "%{mhard-float|msoft-float|mno-float|march=mips*:; \
720 march=vr41*|march=m4k|march=4k*|march=24kc|march=24kec \
721 |march=34kc|march=34kn|march=74kc|march=1004kc|march=5kc \
722 |march=octeon|march=xlr: -msoft-float; \
723 march=*: -mhard-float}"
724
725 /* A spec condition that matches 32-bit options. It only works if
726 MIPS_ISA_LEVEL_SPEC has been applied. */
727
728 #define MIPS_32BIT_OPTION_SPEC \
729 "mips1|mips2|mips32*|mgp32"
730
731 /* Infer a -msynci setting from a -mips argument, on the assumption that
732 -msynci is desired where possible. */
733 #define MIPS_ISA_SYNCI_SPEC \
734 "%{msynci|mno-synci:;:%{mips32r2|mips64r2:-msynci;:-mno-synci}}"
735
736 #if MIPS_ABI_DEFAULT == ABI_O64 \
737 || MIPS_ABI_DEFAULT == ABI_N32 \
738 || MIPS_ABI_DEFAULT == ABI_64
739 #define OPT_ARCH64 "mabi=32|mgp32:;"
740 #define OPT_ARCH32 "mabi=32|mgp32"
741 #else
742 #define OPT_ARCH64 "mabi=o64|mabi=n32|mabi=64|mgp64"
743 #define OPT_ARCH32 "mabi=o64|mabi=n32|mabi=64|mgp64:;"
744 #endif
745
746 /* Support for a compile-time default CPU, et cetera. The rules are:
747 --with-arch is ignored if -march is specified or a -mips is specified
748 (other than -mips16); likewise --with-arch-32 and --with-arch-64.
749 --with-tune is ignored if -mtune is specified; likewise
750 --with-tune-32 and --with-tune-64.
751 --with-abi is ignored if -mabi is specified.
752 --with-float is ignored if -mhard-float or -msoft-float are
753 specified.
754 --with-divide is ignored if -mdivide-traps or -mdivide-breaks are
755 specified. */
756 #define OPTION_DEFAULT_SPECS \
757 {"arch", "%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}" }, \
758 {"arch_32", "%{" OPT_ARCH32 ":%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}}" }, \
759 {"arch_64", "%{" OPT_ARCH64 ":%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}}" }, \
760 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
761 {"tune_32", "%{" OPT_ARCH32 ":%{!mtune=*:-mtune=%(VALUE)}}" }, \
762 {"tune_64", "%{" OPT_ARCH64 ":%{!mtune=*:-mtune=%(VALUE)}}" }, \
763 {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
764 {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }, \
765 {"divide", "%{!mdivide-traps:%{!mdivide-breaks:-mdivide-%(VALUE)}}" }, \
766 {"llsc", "%{!mllsc:%{!mno-llsc:-m%(VALUE)}}" }, \
767 {"mips-plt", "%{!mplt:%{!mno-plt:-m%(VALUE)}}" }, \
768 {"synci", "%{!msynci:%{!mno-synci:-m%(VALUE)}}" }
769
770 /* A spec that infers the -mdsp setting from an -march argument. */
771 #define BASE_DRIVER_SELF_SPECS \
772 "%{!mno-dsp: \
773 %{march=24ke*|march=34kc*|march=34kf*|march=34kx*|march=1004k*: -mdsp} \
774 %{march=74k*:%{!mno-dspr2: -mdspr2 -mdsp}}}"
775
776 #define DRIVER_SELF_SPECS BASE_DRIVER_SELF_SPECS
777
778 #define GENERATE_DIVIDE_TRAPS (TARGET_DIVIDE_TRAPS \
779 && ISA_HAS_COND_TRAP)
780
781 #define GENERATE_BRANCHLIKELY (TARGET_BRANCHLIKELY && !TARGET_MIPS16)
782
783 /* True if the ABI can only work with 64-bit integer registers. We
784 generally allow ad-hoc variations for TARGET_SINGLE_FLOAT, but
785 otherwise floating-point registers must also be 64-bit. */
786 #define ABI_NEEDS_64BIT_REGS (TARGET_NEWABI || mips_abi == ABI_O64)
787
788 /* Likewise for 32-bit regs. */
789 #define ABI_NEEDS_32BIT_REGS (mips_abi == ABI_32)
790
791 /* True if the file format uses 64-bit symbols. At present, this is
792 only true for n64, which uses 64-bit ELF. */
793 #define FILE_HAS_64BIT_SYMBOLS (mips_abi == ABI_64)
794
795 /* True if symbols are 64 bits wide. This is usually determined by
796 the ABI's file format, but it can be overridden by -msym32. Note that
797 overriding the size with -msym32 changes the ABI of relocatable objects,
798 although it doesn't change the ABI of a fully-linked object. */
799 #define ABI_HAS_64BIT_SYMBOLS (FILE_HAS_64BIT_SYMBOLS \
800 && Pmode == DImode \
801 && !TARGET_SYM32)
802
803 /* ISA has instructions for managing 64-bit fp and gp regs (e.g. mips3). */
804 #define ISA_HAS_64BIT_REGS (ISA_MIPS3 \
805 || ISA_MIPS4 \
806 || ISA_MIPS64 \
807 || ISA_MIPS64R2)
808
809 /* ISA has branch likely instructions (e.g. mips2). */
810 /* Disable branchlikely for tx39 until compare rewrite. They haven't
811 been generated up to this point. */
812 #define ISA_HAS_BRANCHLIKELY (!ISA_MIPS1)
813
814 /* ISA has a three-operand multiplication instruction (usually spelt "mul"). */
815 #define ISA_HAS_MUL3 ((TARGET_MIPS3900 \
816 || TARGET_MIPS5400 \
817 || TARGET_MIPS5500 \
818 || TARGET_MIPS7000 \
819 || TARGET_MIPS9000 \
820 || TARGET_MAD \
821 || ISA_MIPS32 \
822 || ISA_MIPS32R2 \
823 || ISA_MIPS64 \
824 || ISA_MIPS64R2) \
825 && !TARGET_MIPS16)
826
827 /* ISA has a three-operand multiplication instruction. */
828 #define ISA_HAS_DMUL3 (TARGET_64BIT \
829 && TARGET_OCTEON \
830 && !TARGET_MIPS16)
831
832 /* ISA has the floating-point conditional move instructions introduced
833 in mips4. */
834 #define ISA_HAS_FP_CONDMOVE ((ISA_MIPS4 \
835 || ISA_MIPS32 \
836 || ISA_MIPS32R2 \
837 || ISA_MIPS64 \
838 || ISA_MIPS64R2) \
839 && !TARGET_MIPS5500 \
840 && !TARGET_MIPS16)
841
842 /* ISA has the integer conditional move instructions introduced in mips4 and
843 ST Loongson 2E/2F. */
844 #define ISA_HAS_CONDMOVE (ISA_HAS_FP_CONDMOVE || TARGET_LOONGSON_2EF)
845
846 /* ISA has LDC1 and SDC1. */
847 #define ISA_HAS_LDC1_SDC1 (!ISA_MIPS1 && !TARGET_MIPS16)
848
849 /* ISA has the mips4 FP condition code instructions: FP-compare to CC,
850 branch on CC, and move (both FP and non-FP) on CC. */
851 #define ISA_HAS_8CC (ISA_MIPS4 \
852 || ISA_MIPS32 \
853 || ISA_MIPS32R2 \
854 || ISA_MIPS64 \
855 || ISA_MIPS64R2)
856
857 /* This is a catch all for other mips4 instructions: indexed load, the
858 FP madd and msub instructions, and the FP recip and recip sqrt
859 instructions. */
860 #define ISA_HAS_FP4 ((ISA_MIPS4 \
861 || (ISA_MIPS32R2 && TARGET_FLOAT64) \
862 || ISA_MIPS64 \
863 || ISA_MIPS64R2) \
864 && !TARGET_MIPS16)
865
866 /* ISA has paired-single instructions. */
867 #define ISA_HAS_PAIRED_SINGLE (ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2)
868
869 /* ISA has conditional trap instructions. */
870 #define ISA_HAS_COND_TRAP (!ISA_MIPS1 \
871 && !TARGET_MIPS16)
872
873 /* ISA has integer multiply-accumulate instructions, madd and msub. */
874 #define ISA_HAS_MADD_MSUB ((ISA_MIPS32 \
875 || ISA_MIPS32R2 \
876 || ISA_MIPS64 \
877 || ISA_MIPS64R2) \
878 && !TARGET_MIPS16)
879
880 /* Integer multiply-accumulate instructions should be generated. */
881 #define GENERATE_MADD_MSUB (ISA_HAS_MADD_MSUB && !TUNE_74K)
882
883 /* ISA has floating-point madd and msub instructions 'd = a * b [+-] c'. */
884 #define ISA_HAS_FP_MADD4_MSUB4 ISA_HAS_FP4
885
886 /* ISA has floating-point madd and msub instructions 'c = a * b [+-] c'. */
887 #define ISA_HAS_FP_MADD3_MSUB3 TARGET_LOONGSON_2EF
888
889 /* ISA has floating-point nmadd and nmsub instructions
890 'd = -((a * b) [+-] c)'. */
891 #define ISA_HAS_NMADD4_NMSUB4(MODE) \
892 ((ISA_MIPS4 \
893 || (ISA_MIPS32R2 && (MODE) == V2SFmode) \
894 || ISA_MIPS64 \
895 || ISA_MIPS64R2) \
896 && (!TARGET_MIPS5400 || TARGET_MAD) \
897 && !TARGET_MIPS16)
898
899 /* ISA has floating-point nmadd and nmsub instructions
900 'c = -((a * b) [+-] c)'. */
901 #define ISA_HAS_NMADD3_NMSUB3(MODE) \
902 TARGET_LOONGSON_2EF
903
904 /* ISA has count leading zeroes/ones instruction (not implemented). */
905 #define ISA_HAS_CLZ_CLO ((ISA_MIPS32 \
906 || ISA_MIPS32R2 \
907 || ISA_MIPS64 \
908 || ISA_MIPS64R2) \
909 && !TARGET_MIPS16)
910
911 /* ISA has three operand multiply instructions that put
912 the high part in an accumulator: mulhi or mulhiu. */
913 #define ISA_HAS_MULHI ((TARGET_MIPS5400 \
914 || TARGET_MIPS5500 \
915 || TARGET_SR71K) \
916 && !TARGET_MIPS16)
917
918 /* ISA has three operand multiply instructions that
919 negates the result and puts the result in an accumulator. */
920 #define ISA_HAS_MULS ((TARGET_MIPS5400 \
921 || TARGET_MIPS5500 \
922 || TARGET_SR71K) \
923 && !TARGET_MIPS16)
924
925 /* ISA has three operand multiply instructions that subtracts the
926 result from a 4th operand and puts the result in an accumulator. */
927 #define ISA_HAS_MSAC ((TARGET_MIPS5400 \
928 || TARGET_MIPS5500 \
929 || TARGET_SR71K) \
930 && !TARGET_MIPS16)
931
932 /* ISA has three operand multiply instructions that the result
933 from a 4th operand and puts the result in an accumulator. */
934 #define ISA_HAS_MACC ((TARGET_MIPS4120 \
935 || TARGET_MIPS4130 \
936 || TARGET_MIPS5400 \
937 || TARGET_MIPS5500 \
938 || TARGET_SR71K) \
939 && !TARGET_MIPS16)
940
941 /* ISA has NEC VR-style MACC, MACCHI, DMACC and DMACCHI instructions. */
942 #define ISA_HAS_MACCHI ((TARGET_MIPS4120 \
943 || TARGET_MIPS4130) \
944 && !TARGET_MIPS16)
945
946 /* ISA has the "ror" (rotate right) instructions. */
947 #define ISA_HAS_ROR ((ISA_MIPS32R2 \
948 || ISA_MIPS64R2 \
949 || TARGET_MIPS5400 \
950 || TARGET_MIPS5500 \
951 || TARGET_SR71K \
952 || TARGET_SMARTMIPS) \
953 && !TARGET_MIPS16)
954
955 /* ISA has data prefetch instructions. This controls use of 'pref'. */
956 #define ISA_HAS_PREFETCH ((ISA_MIPS4 \
957 || TARGET_LOONGSON_2EF \
958 || ISA_MIPS32 \
959 || ISA_MIPS32R2 \
960 || ISA_MIPS64 \
961 || ISA_MIPS64R2) \
962 && !TARGET_MIPS16)
963
964 /* ISA has data indexed prefetch instructions. This controls use of
965 'prefx', along with TARGET_HARD_FLOAT and TARGET_DOUBLE_FLOAT.
966 (prefx is a cop1x instruction, so can only be used if FP is
967 enabled.) */
968 #define ISA_HAS_PREFETCHX ((ISA_MIPS4 \
969 || ISA_MIPS32R2 \
970 || ISA_MIPS64 \
971 || ISA_MIPS64R2) \
972 && !TARGET_MIPS16)
973
974 /* True if trunc.w.s and trunc.w.d are real (not synthetic)
975 instructions. Both require TARGET_HARD_FLOAT, and trunc.w.d
976 also requires TARGET_DOUBLE_FLOAT. */
977 #define ISA_HAS_TRUNC_W (!ISA_MIPS1)
978
979 /* ISA includes the MIPS32r2 seb and seh instructions. */
980 #define ISA_HAS_SEB_SEH ((ISA_MIPS32R2 \
981 || ISA_MIPS64R2) \
982 && !TARGET_MIPS16)
983
984 /* ISA includes the MIPS32/64 rev 2 ext and ins instructions. */
985 #define ISA_HAS_EXT_INS ((ISA_MIPS32R2 \
986 || ISA_MIPS64R2) \
987 && !TARGET_MIPS16)
988
989 /* ISA has instructions for accessing top part of 64-bit fp regs. */
990 #define ISA_HAS_MXHC1 (TARGET_FLOAT64 \
991 && (ISA_MIPS32R2 \
992 || ISA_MIPS64R2))
993
994 /* ISA has lwxs instruction (load w/scaled index address. */
995 #define ISA_HAS_LWXS (TARGET_SMARTMIPS && !TARGET_MIPS16)
996
997 /* ISA has lbx, lbux, lhx, lhx, lhux, lwx, lwux, or ldx instruction. */
998 #define ISA_HAS_LBX (TARGET_OCTEON2)
999 #define ISA_HAS_LBUX (ISA_HAS_DSP || TARGET_OCTEON2)
1000 #define ISA_HAS_LHX (ISA_HAS_DSP || TARGET_OCTEON2)
1001 #define ISA_HAS_LHUX (TARGET_OCTEON2)
1002 #define ISA_HAS_LWX (ISA_HAS_DSP || TARGET_OCTEON2)
1003 #define ISA_HAS_LWUX (TARGET_OCTEON2 && TARGET_64BIT)
1004 #define ISA_HAS_LDX ((ISA_HAS_DSP || TARGET_OCTEON2) \
1005 && TARGET_64BIT)
1006
1007 /* The DSP ASE is available. */
1008 #define ISA_HAS_DSP (TARGET_DSP && !TARGET_MIPS16)
1009
1010 /* Revision 2 of the DSP ASE is available. */
1011 #define ISA_HAS_DSPR2 (TARGET_DSPR2 && !TARGET_MIPS16)
1012
1013 /* True if the result of a load is not available to the next instruction.
1014 A nop will then be needed between instructions like "lw $4,..."
1015 and "addiu $4,$4,1". */
1016 #define ISA_HAS_LOAD_DELAY (ISA_MIPS1 \
1017 && !TARGET_MIPS3900 \
1018 && !TARGET_MIPS16)
1019
1020 /* Likewise mtc1 and mfc1. */
1021 #define ISA_HAS_XFER_DELAY (mips_isa <= 3 \
1022 && !TARGET_LOONGSON_2EF)
1023
1024 /* Likewise floating-point comparisons. */
1025 #define ISA_HAS_FCMP_DELAY (mips_isa <= 3 \
1026 && !TARGET_LOONGSON_2EF)
1027
1028 /* True if mflo and mfhi can be immediately followed by instructions
1029 which write to the HI and LO registers.
1030
1031 According to MIPS specifications, MIPS ISAs I, II, and III need
1032 (at least) two instructions between the reads of HI/LO and
1033 instructions which write them, and later ISAs do not. Contradicting
1034 the MIPS specifications, some MIPS IV processor user manuals (e.g.
1035 the UM for the NEC Vr5000) document needing the instructions between
1036 HI/LO reads and writes, as well. Therefore, we declare only MIPS32,
1037 MIPS64 and later ISAs to have the interlocks, plus any specific
1038 earlier-ISA CPUs for which CPU documentation declares that the
1039 instructions are really interlocked. */
1040 #define ISA_HAS_HILO_INTERLOCKS (ISA_MIPS32 \
1041 || ISA_MIPS32R2 \
1042 || ISA_MIPS64 \
1043 || ISA_MIPS64R2 \
1044 || TARGET_MIPS5500 \
1045 || TARGET_LOONGSON_2EF)
1046
1047 /* ISA includes synci, jr.hb and jalr.hb. */
1048 #define ISA_HAS_SYNCI ((ISA_MIPS32R2 \
1049 || ISA_MIPS64R2) \
1050 && !TARGET_MIPS16)
1051
1052 /* ISA includes sync. */
1053 #define ISA_HAS_SYNC ((mips_isa >= 2 || TARGET_MIPS3900) && !TARGET_MIPS16)
1054 #define GENERATE_SYNC \
1055 (target_flags_explicit & MASK_LLSC \
1056 ? TARGET_LLSC && !TARGET_MIPS16 \
1057 : ISA_HAS_SYNC)
1058
1059 /* ISA includes ll and sc. Note that this implies ISA_HAS_SYNC
1060 because the expanders use both ISA_HAS_SYNC and ISA_HAS_LL_SC
1061 instructions. */
1062 #define ISA_HAS_LL_SC (mips_isa >= 2 && !TARGET_MIPS16)
1063 #define GENERATE_LL_SC \
1064 (target_flags_explicit & MASK_LLSC \
1065 ? TARGET_LLSC && !TARGET_MIPS16 \
1066 : ISA_HAS_LL_SC)
1067
1068 #define ISA_HAS_SWAP (TARGET_XLP)
1069 #define ISA_HAS_LDADD (TARGET_XLP)
1070
1071 /* ISA includes the baddu instruction. */
1072 #define ISA_HAS_BADDU (TARGET_OCTEON && !TARGET_MIPS16)
1073
1074 /* ISA includes the bbit* instructions. */
1075 #define ISA_HAS_BBIT (TARGET_OCTEON && !TARGET_MIPS16)
1076
1077 /* ISA includes the cins instruction. */
1078 #define ISA_HAS_CINS (TARGET_OCTEON && !TARGET_MIPS16)
1079
1080 /* ISA includes the exts instruction. */
1081 #define ISA_HAS_EXTS (TARGET_OCTEON && !TARGET_MIPS16)
1082
1083 /* ISA includes the seq and sne instructions. */
1084 #define ISA_HAS_SEQ_SNE (TARGET_OCTEON && !TARGET_MIPS16)
1085
1086 /* ISA includes the pop instruction. */
1087 #define ISA_HAS_POP (TARGET_OCTEON && !TARGET_MIPS16)
1088
1089 /* The CACHE instruction is available in non-MIPS16 code. */
1090 #define TARGET_CACHE_BUILTIN (mips_isa >= 3)
1091
1092 /* The CACHE instruction is available. */
1093 #define ISA_HAS_CACHE (TARGET_CACHE_BUILTIN && !TARGET_MIPS16)
1094 \f
1095 /* Tell collect what flags to pass to nm. */
1096 #ifndef NM_FLAGS
1097 #define NM_FLAGS "-Bn"
1098 #endif
1099
1100 \f
1101 /* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to
1102 the assembler. It may be overridden by subtargets.
1103
1104 Beginning with gas 2.13, -mdebug must be passed to correctly handle
1105 COFF debugging info. */
1106
1107 #ifndef SUBTARGET_ASM_DEBUGGING_SPEC
1108 #define SUBTARGET_ASM_DEBUGGING_SPEC "\
1109 %{g} %{g0} %{g1} %{g2} %{g3} \
1110 %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
1111 %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
1112 %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
1113 %{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
1114 %{gcoff*:-mdebug} %{!gcoff*:-no-mdebug}"
1115 #endif
1116
1117 /* SUBTARGET_ASM_SPEC is always passed to the assembler. It may be
1118 overridden by subtargets. */
1119
1120 #ifndef SUBTARGET_ASM_SPEC
1121 #define SUBTARGET_ASM_SPEC ""
1122 #endif
1123
1124 #undef ASM_SPEC
1125 #define ASM_SPEC "\
1126 %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \
1127 %{mips32*} %{mips64*} \
1128 %{mips16} %{mno-mips16:-no-mips16} \
1129 %{mips3d} %{mno-mips3d:-no-mips3d} \
1130 %{mdmx} %{mno-mdmx:-no-mdmx} \
1131 %{mdsp} %{mno-dsp} \
1132 %{mdspr2} %{mno-dspr2} \
1133 %{mmcu} %{mno-mcu} \
1134 %{msmartmips} %{mno-smartmips} \
1135 %{mmt} %{mno-mt} \
1136 %{mfix-vr4120} %{mfix-vr4130} \
1137 %{mfix-24k} \
1138 %{noasmopt:-O0; O0|fno-delayed-branch:-O1; O*:-O2; :-O1} \
1139 %(subtarget_asm_debugging_spec) \
1140 %{mabi=*} %{!mabi=*: %(asm_abi_default_spec)} \
1141 %{mgp32} %{mgp64} %{march=*} %{mxgot:-xgot} \
1142 %{mfp32} %{mfp64} \
1143 %{mshared} %{mno-shared} \
1144 %{msym32} %{mno-sym32} \
1145 %{mtune=*} \
1146 %(subtarget_asm_spec)"
1147
1148 /* Extra switches sometimes passed to the linker. */
1149
1150 #ifndef LINK_SPEC
1151 #define LINK_SPEC "\
1152 %(endian_spec) \
1153 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
1154 %{shared}"
1155 #endif /* LINK_SPEC defined */
1156
1157
1158 /* Specs for the compiler proper */
1159
1160 /* SUBTARGET_CC1_SPEC is passed to the compiler proper. It may be
1161 overridden by subtargets. */
1162 #ifndef SUBTARGET_CC1_SPEC
1163 #define SUBTARGET_CC1_SPEC ""
1164 #endif
1165
1166 /* CC1_SPEC is the set of arguments to pass to the compiler proper. */
1167
1168 #undef CC1_SPEC
1169 #define CC1_SPEC "\
1170 %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
1171 %(subtarget_cc1_spec)"
1172
1173 /* Preprocessor specs. */
1174
1175 /* SUBTARGET_CPP_SPEC is passed to the preprocessor. It may be
1176 overridden by subtargets. */
1177 #ifndef SUBTARGET_CPP_SPEC
1178 #define SUBTARGET_CPP_SPEC ""
1179 #endif
1180
1181 #define CPP_SPEC "%(subtarget_cpp_spec)"
1182
1183 /* This macro defines names of additional specifications to put in the specs
1184 that can be used in various specifications like CC1_SPEC. Its definition
1185 is an initializer with a subgrouping for each command option.
1186
1187 Each subgrouping contains a string constant, that defines the
1188 specification name, and a string constant that used by the GCC driver
1189 program.
1190
1191 Do not define this macro if it does not need to do anything. */
1192
1193 #define EXTRA_SPECS \
1194 { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC }, \
1195 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
1196 { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC }, \
1197 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
1198 { "asm_abi_default_spec", "-" MULTILIB_ABI_DEFAULT }, \
1199 { "endian_spec", ENDIAN_SPEC }, \
1200 SUBTARGET_EXTRA_SPECS
1201
1202 #ifndef SUBTARGET_EXTRA_SPECS
1203 #define SUBTARGET_EXTRA_SPECS
1204 #endif
1205 \f
1206 #define DBX_DEBUGGING_INFO 1 /* generate stabs (OSF/rose) */
1207 #define DWARF2_DEBUGGING_INFO 1 /* dwarf2 debugging info */
1208
1209 #ifndef PREFERRED_DEBUGGING_TYPE
1210 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
1211 #endif
1212
1213 /* The size of DWARF addresses should be the same as the size of symbols
1214 in the target file format. They shouldn't depend on things like -msym32,
1215 because many DWARF consumers do not allow the mixture of address sizes
1216 that one would then get from linking -msym32 code with -msym64 code.
1217
1218 Note that the default POINTER_SIZE test is not appropriate for MIPS.
1219 EABI64 has 64-bit pointers but uses 32-bit ELF. */
1220 #define DWARF2_ADDR_SIZE (FILE_HAS_64BIT_SYMBOLS ? 8 : 4)
1221
1222 /* By default, turn on GDB extensions. */
1223 #define DEFAULT_GDB_EXTENSIONS 1
1224
1225 /* Local compiler-generated symbols must have a prefix that the assembler
1226 understands. By default, this is $, although some targets (e.g.,
1227 NetBSD-ELF) need to override this. */
1228
1229 #ifndef LOCAL_LABEL_PREFIX
1230 #define LOCAL_LABEL_PREFIX "$"
1231 #endif
1232
1233 /* By default on the mips, external symbols do not have an underscore
1234 prepended, but some targets (e.g., NetBSD) require this. */
1235
1236 #ifndef USER_LABEL_PREFIX
1237 #define USER_LABEL_PREFIX ""
1238 #endif
1239
1240 /* On Sun 4, this limit is 2048. We use 1500 to be safe,
1241 since the length can run past this up to a continuation point. */
1242 #undef DBX_CONTIN_LENGTH
1243 #define DBX_CONTIN_LENGTH 1500
1244
1245 /* How to renumber registers for dbx and gdb. */
1246 #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[REGNO]
1247
1248 /* The mapping from gcc register number to DWARF 2 CFA column number. */
1249 #define DWARF_FRAME_REGNUM(REGNO) mips_dwarf_regno[REGNO]
1250
1251 /* The DWARF 2 CFA column which tracks the return address. */
1252 #define DWARF_FRAME_RETURN_COLUMN RETURN_ADDR_REGNUM
1253
1254 /* Before the prologue, RA lives in r31. */
1255 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, RETURN_ADDR_REGNUM)
1256
1257 /* Describe how we implement __builtin_eh_return. */
1258 #define EH_RETURN_DATA_REGNO(N) \
1259 ((N) < (TARGET_MIPS16 ? 2 : 4) ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
1260
1261 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_REG_FIRST + 3)
1262
1263 #define EH_USES(N) mips_eh_uses (N)
1264
1265 /* Offsets recorded in opcodes are a multiple of this alignment factor.
1266 The default for this in 64-bit mode is 8, which causes problems with
1267 SFmode register saves. */
1268 #define DWARF_CIE_DATA_ALIGNMENT -4
1269
1270 /* Correct the offset of automatic variables and arguments. Note that
1271 the MIPS debug format wants all automatic variables and arguments
1272 to be in terms of the virtual frame pointer (stack pointer before
1273 any adjustment in the function), while the MIPS 3.0 linker wants
1274 the frame pointer to be the stack pointer after the initial
1275 adjustment. */
1276
1277 #define DEBUGGER_AUTO_OFFSET(X) \
1278 mips_debugger_offset (X, (HOST_WIDE_INT) 0)
1279 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
1280 mips_debugger_offset (X, (HOST_WIDE_INT) OFFSET)
1281 \f
1282 /* Target machine storage layout */
1283
1284 #define BITS_BIG_ENDIAN 0
1285 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1286 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1287
1288 #define MAX_BITS_PER_WORD 64
1289
1290 /* Width of a word, in units (bytes). */
1291 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
1292 #ifndef IN_LIBGCC2
1293 #define MIN_UNITS_PER_WORD 4
1294 #endif
1295
1296 /* For MIPS, width of a floating point register. */
1297 #define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
1298
1299 /* The number of consecutive floating-point registers needed to store the
1300 largest format supported by the FPU. */
1301 #define MAX_FPRS_PER_FMT (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT ? 1 : 2)
1302
1303 /* The number of consecutive floating-point registers needed to store the
1304 smallest format supported by the FPU. */
1305 #define MIN_FPRS_PER_FMT \
1306 (ISA_MIPS32 || ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2 \
1307 ? 1 : MAX_FPRS_PER_FMT)
1308
1309 /* The largest size of value that can be held in floating-point
1310 registers and moved with a single instruction. */
1311 #define UNITS_PER_HWFPVALUE \
1312 (TARGET_SOFT_FLOAT_ABI ? 0 : MAX_FPRS_PER_FMT * UNITS_PER_FPREG)
1313
1314 /* The largest size of value that can be held in floating-point
1315 registers. */
1316 #define UNITS_PER_FPVALUE \
1317 (TARGET_SOFT_FLOAT_ABI ? 0 \
1318 : TARGET_SINGLE_FLOAT ? UNITS_PER_FPREG \
1319 : LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
1320
1321 /* The number of bytes in a double. */
1322 #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT)
1323
1324 /* Set the sizes of the core types. */
1325 #define SHORT_TYPE_SIZE 16
1326 #define INT_TYPE_SIZE 32
1327 #define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
1328 #define LONG_LONG_TYPE_SIZE 64
1329
1330 #define FLOAT_TYPE_SIZE 32
1331 #define DOUBLE_TYPE_SIZE 64
1332 #define LONG_DOUBLE_TYPE_SIZE (TARGET_NEWABI ? 128 : 64)
1333
1334 /* Define the sizes of fixed-point types. */
1335 #define SHORT_FRACT_TYPE_SIZE 8
1336 #define FRACT_TYPE_SIZE 16
1337 #define LONG_FRACT_TYPE_SIZE 32
1338 #define LONG_LONG_FRACT_TYPE_SIZE 64
1339
1340 #define SHORT_ACCUM_TYPE_SIZE 16
1341 #define ACCUM_TYPE_SIZE 32
1342 #define LONG_ACCUM_TYPE_SIZE 64
1343 /* FIXME. LONG_LONG_ACCUM_TYPE_SIZE should be 128 bits, but GCC
1344 doesn't support 128-bit integers for MIPS32 currently. */
1345 #define LONG_LONG_ACCUM_TYPE_SIZE (TARGET_64BIT ? 128 : 64)
1346
1347 /* long double is not a fixed mode, but the idea is that, if we
1348 support long double, we also want a 128-bit integer type. */
1349 #define MAX_FIXED_MODE_SIZE LONG_DOUBLE_TYPE_SIZE
1350
1351 #ifdef IN_LIBGCC2
1352 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
1353 || (defined _ABI64 && _MIPS_SIM == _ABI64)
1354 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
1355 # else
1356 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
1357 # endif
1358 #endif
1359
1360 /* Width in bits of a pointer. */
1361 #ifndef POINTER_SIZE
1362 #define POINTER_SIZE ((TARGET_LONG64 && TARGET_64BIT) ? 64 : 32)
1363 #endif
1364
1365 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
1366 #define PARM_BOUNDARY BITS_PER_WORD
1367
1368 /* Allocation boundary (in *bits*) for the code of a function. */
1369 #define FUNCTION_BOUNDARY 32
1370
1371 /* Alignment of field after `int : 0' in a structure. */
1372 #define EMPTY_FIELD_BOUNDARY 32
1373
1374 /* Every structure's size must be a multiple of this. */
1375 /* 8 is observed right on a DECstation and on riscos 4.02. */
1376 #define STRUCTURE_SIZE_BOUNDARY 8
1377
1378 /* There is no point aligning anything to a rounder boundary than this. */
1379 #define BIGGEST_ALIGNMENT LONG_DOUBLE_TYPE_SIZE
1380
1381 /* All accesses must be aligned. */
1382 #define STRICT_ALIGNMENT 1
1383
1384 /* Define this if you wish to imitate the way many other C compilers
1385 handle alignment of bitfields and the structures that contain
1386 them.
1387
1388 The behavior is that the type written for a bit-field (`int',
1389 `short', or other integer type) imposes an alignment for the
1390 entire structure, as if the structure really did contain an
1391 ordinary field of that type. In addition, the bit-field is placed
1392 within the structure so that it would fit within such a field,
1393 not crossing a boundary for it.
1394
1395 Thus, on most machines, a bit-field whose type is written as `int'
1396 would not cross a four-byte boundary, and would force four-byte
1397 alignment for the whole structure. (The alignment used may not
1398 be four bytes; it is controlled by the other alignment
1399 parameters.)
1400
1401 If the macro is defined, its definition should be a C expression;
1402 a nonzero value for the expression enables this behavior. */
1403
1404 #define PCC_BITFIELD_TYPE_MATTERS 1
1405
1406 /* If defined, a C expression to compute the alignment given to a
1407 constant that is being placed in memory. CONSTANT is the constant
1408 and ALIGN is the alignment that the object would ordinarily have.
1409 The value of this macro is used instead of that alignment to align
1410 the object.
1411
1412 If this macro is not defined, then ALIGN is used.
1413
1414 The typical use of this macro is to increase alignment for string
1415 constants to be word aligned so that `strcpy' calls that copy
1416 constants can be done inline. */
1417
1418 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
1419 ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
1420 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
1421
1422 /* If defined, a C expression to compute the alignment for a static
1423 variable. TYPE is the data type, and ALIGN is the alignment that
1424 the object would ordinarily have. The value of this macro is used
1425 instead of that alignment to align the object.
1426
1427 If this macro is not defined, then ALIGN is used.
1428
1429 One use of this macro is to increase alignment of medium-size
1430 data to make it all fit in fewer cache lines. Another is to
1431 cause character arrays to be word-aligned so that `strcpy' calls
1432 that copy constants to character arrays can be done inline. */
1433
1434 #undef DATA_ALIGNMENT
1435 #define DATA_ALIGNMENT(TYPE, ALIGN) \
1436 ((((ALIGN) < BITS_PER_WORD) \
1437 && (TREE_CODE (TYPE) == ARRAY_TYPE \
1438 || TREE_CODE (TYPE) == UNION_TYPE \
1439 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
1440
1441 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause
1442 character arrays to be word-aligned so that `strcpy' calls that copy
1443 constants to character arrays can be done inline, and 'strcmp' can be
1444 optimised to use word loads. */
1445 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
1446 DATA_ALIGNMENT (TYPE, ALIGN)
1447
1448 #define PAD_VARARGS_DOWN \
1449 (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward)
1450
1451 /* Define if operations between registers always perform the operation
1452 on the full register even if a narrower mode is specified. */
1453 #define WORD_REGISTER_OPERATIONS
1454
1455 /* When in 64-bit mode, move insns will sign extend SImode and CCmode
1456 moves. All other references are zero extended. */
1457 #define LOAD_EXTEND_OP(MODE) \
1458 (TARGET_64BIT && ((MODE) == SImode || (MODE) == CCmode) \
1459 ? SIGN_EXTEND : ZERO_EXTEND)
1460
1461 /* Define this macro if it is advisable to hold scalars in registers
1462 in a wider mode than that declared by the program. In such cases,
1463 the value is constrained to be within the bounds of the declared
1464 type, but kept valid in the wider mode. The signedness of the
1465 extension may differ from that of the type. */
1466
1467 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
1468 if (GET_MODE_CLASS (MODE) == MODE_INT \
1469 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
1470 { \
1471 if ((MODE) == SImode) \
1472 (UNSIGNEDP) = 0; \
1473 (MODE) = Pmode; \
1474 }
1475
1476 /* Pmode is always the same as ptr_mode, but not always the same as word_mode.
1477 Extensions of pointers to word_mode must be signed. */
1478 #define POINTERS_EXTEND_UNSIGNED false
1479
1480 /* Define if loading short immediate values into registers sign extends. */
1481 #define SHORT_IMMEDIATES_SIGN_EXTEND
1482
1483 /* The [d]clz instructions have the natural values at 0. */
1484
1485 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1486 ((VALUE) = GET_MODE_BITSIZE (MODE), 2)
1487 \f
1488 /* Standard register usage. */
1489
1490 /* Number of hardware registers. We have:
1491
1492 - 32 integer registers
1493 - 32 floating point registers
1494 - 8 condition code registers
1495 - 2 accumulator registers (hi and lo)
1496 - 32 registers each for coprocessors 0, 2 and 3
1497 - 4 fake registers:
1498 - ARG_POINTER_REGNUM
1499 - FRAME_POINTER_REGNUM
1500 - GOT_VERSION_REGNUM (see the comment above load_call<mode> for details)
1501 - CPRESTORE_SLOT_REGNUM
1502 - 2 dummy entries that were used at various times in the past.
1503 - 6 DSP accumulator registers (3 hi-lo pairs) for MIPS DSP ASE
1504 - 6 DSP control registers */
1505
1506 #define FIRST_PSEUDO_REGISTER 188
1507
1508 /* By default, fix the kernel registers ($26 and $27), the global
1509 pointer ($28) and the stack pointer ($29). This can change
1510 depending on the command-line options.
1511
1512 Regarding coprocessor registers: without evidence to the contrary,
1513 it's best to assume that each coprocessor register has a unique
1514 use. This can be overridden, in, e.g., mips_option_override or
1515 TARGET_CONDITIONAL_REGISTER_USAGE should the assumption be
1516 inappropriate for a particular target. */
1517
1518 #define FIXED_REGISTERS \
1519 { \
1520 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1521 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, \
1522 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1523 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1524 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, \
1525 /* COP0 registers */ \
1526 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1527 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1528 /* COP2 registers */ \
1529 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1530 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1531 /* COP3 registers */ \
1532 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1533 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1534 /* 6 DSP accumulator registers & 6 control registers */ \
1535 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1 \
1536 }
1537
1538
1539 /* Set up this array for o32 by default.
1540
1541 Note that we don't mark $31 as a call-clobbered register. The idea is
1542 that it's really the call instructions themselves which clobber $31.
1543 We don't care what the called function does with it afterwards.
1544
1545 This approach makes it easier to implement sibcalls. Unlike normal
1546 calls, sibcalls don't clobber $31, so the register reaches the
1547 called function in tact. EPILOGUE_USES says that $31 is useful
1548 to the called function. */
1549
1550 #define CALL_USED_REGISTERS \
1551 { \
1552 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1553 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, \
1554 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1555 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1556 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1557 /* COP0 registers */ \
1558 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1559 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1560 /* COP2 registers */ \
1561 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1562 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1563 /* COP3 registers */ \
1564 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1565 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1566 /* 6 DSP accumulator registers & 6 control registers */ \
1567 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
1568 }
1569
1570
1571 /* Define this since $28, though fixed, is call-saved in many ABIs. */
1572
1573 #define CALL_REALLY_USED_REGISTERS \
1574 { /* General registers. */ \
1575 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1576 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, \
1577 /* Floating-point registers. */ \
1578 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1579 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1580 /* Others. */ \
1581 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, \
1582 /* COP0 registers */ \
1583 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1584 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1585 /* COP2 registers */ \
1586 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1587 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1588 /* COP3 registers */ \
1589 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1590 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1591 /* 6 DSP accumulator registers & 6 control registers */ \
1592 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 \
1593 }
1594
1595 /* Internal macros to classify a register number as to whether it's a
1596 general purpose register, a floating point register, a
1597 multiply/divide register, or a status register. */
1598
1599 #define GP_REG_FIRST 0
1600 #define GP_REG_LAST 31
1601 #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
1602 #define GP_DBX_FIRST 0
1603 #define K0_REG_NUM (GP_REG_FIRST + 26)
1604 #define K1_REG_NUM (GP_REG_FIRST + 27)
1605 #define KERNEL_REG_P(REGNO) (IN_RANGE (REGNO, K0_REG_NUM, K1_REG_NUM))
1606
1607 #define FP_REG_FIRST 32
1608 #define FP_REG_LAST 63
1609 #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
1610 #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32)
1611
1612 #define MD_REG_FIRST 64
1613 #define MD_REG_LAST 65
1614 #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1)
1615 #define MD_DBX_FIRST (FP_DBX_FIRST + FP_REG_NUM)
1616
1617 /* The DWARF 2 CFA column which tracks the return address from a
1618 signal handler context. This means that to maintain backwards
1619 compatibility, no hard register can be assigned this column if it
1620 would need to be handled by the DWARF unwinder. */
1621 #define DWARF_ALT_FRAME_RETURN_COLUMN 66
1622
1623 #define ST_REG_FIRST 67
1624 #define ST_REG_LAST 74
1625 #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1)
1626
1627
1628 /* FIXME: renumber. */
1629 #define COP0_REG_FIRST 80
1630 #define COP0_REG_LAST 111
1631 #define COP0_REG_NUM (COP0_REG_LAST - COP0_REG_FIRST + 1)
1632
1633 #define COP0_STATUS_REG_NUM (COP0_REG_FIRST + 12)
1634 #define COP0_CAUSE_REG_NUM (COP0_REG_FIRST + 13)
1635 #define COP0_EPC_REG_NUM (COP0_REG_FIRST + 14)
1636
1637 #define COP2_REG_FIRST 112
1638 #define COP2_REG_LAST 143
1639 #define COP2_REG_NUM (COP2_REG_LAST - COP2_REG_FIRST + 1)
1640
1641 #define COP3_REG_FIRST 144
1642 #define COP3_REG_LAST 175
1643 #define COP3_REG_NUM (COP3_REG_LAST - COP3_REG_FIRST + 1)
1644 /* ALL_COP_REG_NUM assumes that COP0,2,and 3 are numbered consecutively. */
1645 #define ALL_COP_REG_NUM (COP3_REG_LAST - COP0_REG_FIRST + 1)
1646
1647 #define DSP_ACC_REG_FIRST 176
1648 #define DSP_ACC_REG_LAST 181
1649 #define DSP_ACC_REG_NUM (DSP_ACC_REG_LAST - DSP_ACC_REG_FIRST + 1)
1650
1651 #define AT_REGNUM (GP_REG_FIRST + 1)
1652 #define HI_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST : MD_REG_FIRST + 1)
1653 #define LO_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST + 1 : MD_REG_FIRST)
1654
1655 /* A few bitfield locations for the coprocessor registers. */
1656 /* Request Interrupt Priority Level is from bit 10 to bit 15 of
1657 the cause register for the EIC interrupt mode. */
1658 #define CAUSE_IPL 10
1659 /* Interrupt Priority Level is from bit 10 to bit 15 of the status register. */
1660 #define SR_IPL 10
1661 /* Exception Level is at bit 1 of the status register. */
1662 #define SR_EXL 1
1663 /* Interrupt Enable is at bit 0 of the status register. */
1664 #define SR_IE 0
1665
1666 /* FPSW_REGNUM is the single condition code used if !ISA_HAS_8CC.
1667 If ISA_HAS_8CC, it should not be used, and an arbitrary ST_REG
1668 should be used instead. */
1669 #define FPSW_REGNUM ST_REG_FIRST
1670
1671 #define GP_REG_P(REGNO) \
1672 ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
1673 #define M16_REG_P(REGNO) \
1674 (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17)
1675 #define FP_REG_P(REGNO) \
1676 ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
1677 #define MD_REG_P(REGNO) \
1678 ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM)
1679 #define ST_REG_P(REGNO) \
1680 ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM)
1681 #define COP0_REG_P(REGNO) \
1682 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < COP0_REG_NUM)
1683 #define COP2_REG_P(REGNO) \
1684 ((unsigned int) ((int) (REGNO) - COP2_REG_FIRST) < COP2_REG_NUM)
1685 #define COP3_REG_P(REGNO) \
1686 ((unsigned int) ((int) (REGNO) - COP3_REG_FIRST) < COP3_REG_NUM)
1687 #define ALL_COP_REG_P(REGNO) \
1688 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < ALL_COP_REG_NUM)
1689 /* Test if REGNO is one of the 6 new DSP accumulators. */
1690 #define DSP_ACC_REG_P(REGNO) \
1691 ((unsigned int) ((int) (REGNO) - DSP_ACC_REG_FIRST) < DSP_ACC_REG_NUM)
1692 /* Test if REGNO is hi, lo, or one of the 6 new DSP accumulators. */
1693 #define ACC_REG_P(REGNO) \
1694 (MD_REG_P (REGNO) || DSP_ACC_REG_P (REGNO))
1695
1696 #define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
1697
1698 /* True if X is (const (unspec [(const_int 0)] UNSPEC_GP)). This is used
1699 to initialize the mips16 gp pseudo register. */
1700 #define CONST_GP_P(X) \
1701 (GET_CODE (X) == CONST \
1702 && GET_CODE (XEXP (X, 0)) == UNSPEC \
1703 && XINT (XEXP (X, 0), 1) == UNSPEC_GP)
1704
1705 /* Return coprocessor number from register number. */
1706
1707 #define COPNUM_AS_CHAR_FROM_REGNUM(REGNO) \
1708 (COP0_REG_P (REGNO) ? '0' : COP2_REG_P (REGNO) ? '2' \
1709 : COP3_REG_P (REGNO) ? '3' : '?')
1710
1711
1712 #define HARD_REGNO_NREGS(REGNO, MODE) mips_hard_regno_nregs (REGNO, MODE)
1713
1714 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1715 mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ]
1716
1717 #define MODES_TIEABLE_P mips_modes_tieable_p
1718
1719 /* Register to use for pushing function arguments. */
1720 #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29)
1721
1722 /* These two registers don't really exist: they get eliminated to either
1723 the stack or hard frame pointer. */
1724 #define ARG_POINTER_REGNUM 77
1725 #define FRAME_POINTER_REGNUM 78
1726
1727 /* $30 is not available on the mips16, so we use $17 as the frame
1728 pointer. */
1729 #define HARD_FRAME_POINTER_REGNUM \
1730 (TARGET_MIPS16 ? GP_REG_FIRST + 17 : GP_REG_FIRST + 30)
1731
1732 #define HARD_FRAME_POINTER_IS_FRAME_POINTER 0
1733 #define HARD_FRAME_POINTER_IS_ARG_POINTER 0
1734
1735 /* Register in which static-chain is passed to a function. */
1736 #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 15)
1737
1738 /* Registers used as temporaries in prologue/epilogue code:
1739
1740 - If a MIPS16 PIC function needs access to _gp, it first loads
1741 the value into MIPS16_PIC_TEMP and then copies it to $gp.
1742
1743 - The prologue can use MIPS_PROLOGUE_TEMP as a general temporary
1744 register. The register must not conflict with MIPS16_PIC_TEMP.
1745
1746 - The epilogue can use MIPS_EPILOGUE_TEMP as a general temporary
1747 register.
1748
1749 If we're generating MIPS16 code, these registers must come from the
1750 core set of 8. The prologue registers mustn't conflict with any
1751 incoming arguments, the static chain pointer, or the frame pointer.
1752 The epilogue temporary mustn't conflict with the return registers,
1753 the PIC call register ($25), the frame pointer, the EH stack adjustment,
1754 or the EH data registers.
1755
1756 If we're generating interrupt handlers, we use K0 as a temporary register
1757 in prologue/epilogue code. */
1758
1759 #define MIPS16_PIC_TEMP_REGNUM (GP_REG_FIRST + 2)
1760 #define MIPS_PROLOGUE_TEMP_REGNUM \
1761 (cfun->machine->interrupt_handler_p ? K0_REG_NUM : GP_REG_FIRST + 3)
1762 #define MIPS_EPILOGUE_TEMP_REGNUM \
1763 (cfun->machine->interrupt_handler_p \
1764 ? K0_REG_NUM \
1765 : GP_REG_FIRST + (TARGET_MIPS16 ? 6 : 8))
1766
1767 #define MIPS16_PIC_TEMP gen_rtx_REG (Pmode, MIPS16_PIC_TEMP_REGNUM)
1768 #define MIPS_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_PROLOGUE_TEMP_REGNUM)
1769 #define MIPS_EPILOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_EPILOGUE_TEMP_REGNUM)
1770
1771 /* Define this macro if it is as good or better to call a constant
1772 function address than to call an address kept in a register. */
1773 #define NO_FUNCTION_CSE 1
1774
1775 /* The ABI-defined global pointer. Sometimes we use a different
1776 register in leaf functions: see PIC_OFFSET_TABLE_REGNUM. */
1777 #define GLOBAL_POINTER_REGNUM (GP_REG_FIRST + 28)
1778
1779 /* We normally use $28 as the global pointer. However, when generating
1780 n32/64 PIC, it is better for leaf functions to use a call-clobbered
1781 register instead. They can then avoid saving and restoring $28
1782 and perhaps avoid using a frame at all.
1783
1784 When a leaf function uses something other than $28, mips_expand_prologue
1785 will modify pic_offset_table_rtx in place. Take the register number
1786 from there after reload. */
1787 #define PIC_OFFSET_TABLE_REGNUM \
1788 (reload_completed ? REGNO (pic_offset_table_rtx) : GLOBAL_POINTER_REGNUM)
1789 \f
1790 /* Define the classes of registers for register constraints in the
1791 machine description. Also define ranges of constants.
1792
1793 One of the classes must always be named ALL_REGS and include all hard regs.
1794 If there is more than one class, another class must be named NO_REGS
1795 and contain no registers.
1796
1797 The name GENERAL_REGS must be the name of a class (or an alias for
1798 another name such as ALL_REGS). This is the class of registers
1799 that is allowed by "g" or "r" in a register constraint.
1800 Also, registers outside this class are allocated only when
1801 instructions express preferences for them.
1802
1803 The classes must be numbered in nondecreasing order; that is,
1804 a larger-numbered class must never be contained completely
1805 in a smaller-numbered class.
1806
1807 For any two classes, it is very desirable that there be another
1808 class that represents their union. */
1809
1810 enum reg_class
1811 {
1812 NO_REGS, /* no registers in set */
1813 M16_REGS, /* mips16 directly accessible registers */
1814 T_REG, /* mips16 T register ($24) */
1815 M16_T_REGS, /* mips16 registers plus T register */
1816 PIC_FN_ADDR_REG, /* SVR4 PIC function address register */
1817 V1_REG, /* Register $v1 ($3) used for TLS access. */
1818 LEA_REGS, /* Every GPR except $25 */
1819 GR_REGS, /* integer registers */
1820 FP_REGS, /* floating point registers */
1821 MD0_REG, /* first multiply/divide register */
1822 MD1_REG, /* second multiply/divide register */
1823 MD_REGS, /* multiply/divide registers (hi/lo) */
1824 COP0_REGS, /* generic coprocessor classes */
1825 COP2_REGS,
1826 COP3_REGS,
1827 ST_REGS, /* status registers (fp status) */
1828 DSP_ACC_REGS, /* DSP accumulator registers */
1829 ACC_REGS, /* Hi/Lo and DSP accumulator registers */
1830 FRAME_REGS, /* $arg and $frame */
1831 GR_AND_MD0_REGS, /* union classes */
1832 GR_AND_MD1_REGS,
1833 GR_AND_MD_REGS,
1834 GR_AND_ACC_REGS,
1835 ALL_REGS, /* all registers */
1836 LIM_REG_CLASSES /* max value + 1 */
1837 };
1838
1839 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1840
1841 #define GENERAL_REGS GR_REGS
1842
1843 /* An initializer containing the names of the register classes as C
1844 string constants. These names are used in writing some of the
1845 debugging dumps. */
1846
1847 #define REG_CLASS_NAMES \
1848 { \
1849 "NO_REGS", \
1850 "M16_REGS", \
1851 "T_REG", \
1852 "M16_T_REGS", \
1853 "PIC_FN_ADDR_REG", \
1854 "V1_REG", \
1855 "LEA_REGS", \
1856 "GR_REGS", \
1857 "FP_REGS", \
1858 "MD0_REG", \
1859 "MD1_REG", \
1860 "MD_REGS", \
1861 /* coprocessor registers */ \
1862 "COP0_REGS", \
1863 "COP2_REGS", \
1864 "COP3_REGS", \
1865 "ST_REGS", \
1866 "DSP_ACC_REGS", \
1867 "ACC_REGS", \
1868 "FRAME_REGS", \
1869 "GR_AND_MD0_REGS", \
1870 "GR_AND_MD1_REGS", \
1871 "GR_AND_MD_REGS", \
1872 "GR_AND_ACC_REGS", \
1873 "ALL_REGS" \
1874 }
1875
1876 /* An initializer containing the contents of the register classes,
1877 as integers which are bit masks. The Nth integer specifies the
1878 contents of class N. The way the integer MASK is interpreted is
1879 that register R is in the class if `MASK & (1 << R)' is 1.
1880
1881 When the machine has more than 32 registers, an integer does not
1882 suffice. Then the integers are replaced by sub-initializers,
1883 braced groupings containing several integers. Each
1884 sub-initializer must be suitable as an initializer for the type
1885 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
1886
1887 #define REG_CLASS_CONTENTS \
1888 { \
1889 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
1890 { 0x000300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* M16_REGS */ \
1891 { 0x01000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* T_REG */ \
1892 { 0x010300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* M16_T_REGS */ \
1893 { 0x02000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* PIC_FN_ADDR_REG */ \
1894 { 0x00000008, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* V1_REG */ \
1895 { 0xfdffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* LEA_REGS */ \
1896 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* GR_REGS */ \
1897 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* FP_REGS */ \
1898 { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* MD0_REG */ \
1899 { 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* MD1_REG */ \
1900 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* MD_REGS */ \
1901 { 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, /* COP0_REGS */ \
1902 { 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, /* COP2_REGS */ \
1903 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, /* COP3_REGS */ \
1904 { 0x00000000, 0x00000000, 0x000007f8, 0x00000000, 0x00000000, 0x00000000 }, /* ST_REGS */ \
1905 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x003f0000 }, /* DSP_ACC_REGS */ \
1906 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* ACC_REGS */ \
1907 { 0x00000000, 0x00000000, 0x00006000, 0x00000000, 0x00000000, 0x00000000 }, /* FRAME_REGS */ \
1908 { 0xffffffff, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* GR_AND_MD0_REGS */ \
1909 { 0xffffffff, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* GR_AND_MD1_REGS */ \
1910 { 0xffffffff, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* GR_AND_MD_REGS */ \
1911 { 0xffffffff, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* GR_AND_ACC_REGS */ \
1912 { 0xffffffff, 0xffffffff, 0xffff67ff, 0xffffffff, 0xffffffff, 0x0fffffff } /* ALL_REGS */ \
1913 }
1914
1915
1916 /* A C expression whose value is a register class containing hard
1917 register REGNO. In general there is more that one such class;
1918 choose a class which is "minimal", meaning that no smaller class
1919 also contains the register. */
1920
1921 #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ]
1922
1923 /* A macro whose definition is the name of the class to which a
1924 valid base register must belong. A base register is one used in
1925 an address which is the register value plus a displacement. */
1926
1927 #define BASE_REG_CLASS (TARGET_MIPS16 ? M16_REGS : GR_REGS)
1928
1929 /* A macro whose definition is the name of the class to which a
1930 valid index register must belong. An index register is one used
1931 in an address where its value is either multiplied by a scale
1932 factor or added to another register (as well as added to a
1933 displacement). */
1934
1935 #define INDEX_REG_CLASS NO_REGS
1936
1937 /* We generally want to put call-clobbered registers ahead of
1938 call-saved ones. (IRA expects this.) */
1939
1940 #define REG_ALLOC_ORDER \
1941 { /* Accumulator registers. When GPRs and accumulators have equal \
1942 cost, we generally prefer to use accumulators. For example, \
1943 a division of multiplication result is better allocated to LO, \
1944 so that we put the MFLO at the point of use instead of at the \
1945 point of definition. It's also needed if we're to take advantage \
1946 of the extra accumulators available with -mdspr2. In some cases, \
1947 it can also help to reduce register pressure. */ \
1948 64, 65,176,177,178,179,180,181, \
1949 /* Call-clobbered GPRs. */ \
1950 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
1951 24, 25, 31, \
1952 /* The global pointer. This is call-clobbered for o32 and o64 \
1953 abicalls, call-saved for n32 and n64 abicalls, and a program \
1954 invariant otherwise. Putting it between the call-clobbered \
1955 and call-saved registers should cope with all eventualities. */ \
1956 28, \
1957 /* Call-saved GPRs. */ \
1958 16, 17, 18, 19, 20, 21, 22, 23, 30, \
1959 /* GPRs that can never be exposed to the register allocator. */ \
1960 0, 26, 27, 29, \
1961 /* Call-clobbered FPRs. */ \
1962 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
1963 48, 49, 50, 51, \
1964 /* FPRs that are usually call-saved. The odd ones are actually \
1965 call-clobbered for n32, but listing them ahead of the even \
1966 registers might encourage the register allocator to fragment \
1967 the available FPR pairs. We need paired FPRs to store long \
1968 doubles, so it isn't clear that using a different order \
1969 for n32 would be a win. */ \
1970 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \
1971 /* None of the remaining classes have defined call-saved \
1972 registers. */ \
1973 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
1974 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \
1975 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \
1976 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, \
1977 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, \
1978 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, \
1979 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, \
1980 182,183,184,185,186,187 \
1981 }
1982
1983 /* ADJUST_REG_ALLOC_ORDER is a macro which permits reg_alloc_order
1984 to be rearranged based on a particular function. On the mips16, we
1985 want to allocate $24 (T_REG) before other registers for
1986 instructions for which it is possible. */
1987
1988 #define ADJUST_REG_ALLOC_ORDER mips_order_regs_for_local_alloc ()
1989
1990 /* True if VALUE is an unsigned 6-bit number. */
1991
1992 #define UIMM6_OPERAND(VALUE) \
1993 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0x3f) == 0)
1994
1995 /* True if VALUE is a signed 10-bit number. */
1996
1997 #define IMM10_OPERAND(VALUE) \
1998 ((unsigned HOST_WIDE_INT) (VALUE) + 0x200 < 0x400)
1999
2000 /* True if VALUE is a signed 16-bit number. */
2001
2002 #define SMALL_OPERAND(VALUE) \
2003 ((unsigned HOST_WIDE_INT) (VALUE) + 0x8000 < 0x10000)
2004
2005 /* True if VALUE is an unsigned 16-bit number. */
2006
2007 #define SMALL_OPERAND_UNSIGNED(VALUE) \
2008 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0xffff) == 0)
2009
2010 /* True if VALUE can be loaded into a register using LUI. */
2011
2012 #define LUI_OPERAND(VALUE) \
2013 (((VALUE) | 0x7fff0000) == 0x7fff0000 \
2014 || ((VALUE) | 0x7fff0000) + 0x10000 == 0)
2015
2016 /* Return a value X with the low 16 bits clear, and such that
2017 VALUE - X is a signed 16-bit value. */
2018
2019 #define CONST_HIGH_PART(VALUE) \
2020 (((VALUE) + 0x8000) & ~(unsigned HOST_WIDE_INT) 0xffff)
2021
2022 #define CONST_LOW_PART(VALUE) \
2023 ((VALUE) - CONST_HIGH_PART (VALUE))
2024
2025 #define SMALL_INT(X) SMALL_OPERAND (INTVAL (X))
2026 #define SMALL_INT_UNSIGNED(X) SMALL_OPERAND_UNSIGNED (INTVAL (X))
2027 #define LUI_INT(X) LUI_OPERAND (INTVAL (X))
2028
2029 /* The HI and LO registers can only be reloaded via the general
2030 registers. Condition code registers can only be loaded to the
2031 general registers, and from the floating point registers. */
2032
2033 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
2034 mips_secondary_reload_class (CLASS, MODE, X, true)
2035 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
2036 mips_secondary_reload_class (CLASS, MODE, X, false)
2037
2038 /* Return the maximum number of consecutive registers
2039 needed to represent mode MODE in a register of class CLASS. */
2040
2041 #define CLASS_MAX_NREGS(CLASS, MODE) mips_class_max_nregs (CLASS, MODE)
2042
2043 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
2044 mips_cannot_change_mode_class (FROM, TO, CLASS)
2045 \f
2046 /* Stack layout; function entry, exit and calling. */
2047
2048 #define STACK_GROWS_DOWNWARD
2049
2050 #define FRAME_GROWS_DOWNWARD flag_stack_protect
2051
2052 /* Size of the area allocated in the frame to save the GP. */
2053
2054 #define MIPS_GP_SAVE_AREA_SIZE \
2055 (TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0)
2056
2057 /* The offset of the first local variable from the frame pointer. See
2058 mips_compute_frame_info for details about the frame layout. */
2059
2060 #define STARTING_FRAME_OFFSET \
2061 (FRAME_GROWS_DOWNWARD \
2062 ? 0 \
2063 : crtl->outgoing_args_size + MIPS_GP_SAVE_AREA_SIZE)
2064
2065 #define RETURN_ADDR_RTX mips_return_addr
2066
2067 /* Mask off the MIPS16 ISA bit in unwind addresses.
2068
2069 The reason for this is a little subtle. When unwinding a call,
2070 we are given the call's return address, which on most targets
2071 is the address of the following instruction. However, what we
2072 actually want to find is the EH region for the call itself.
2073 The target-independent unwind code therefore searches for "RA - 1".
2074
2075 In the MIPS16 case, RA is always an odd-valued (ISA-encoded) address.
2076 RA - 1 is therefore the real (even-valued) start of the return
2077 instruction. EH region labels are usually odd-valued MIPS16 symbols
2078 too, so a search for an even address within a MIPS16 region would
2079 usually work.
2080
2081 However, there is an exception. If the end of an EH region is also
2082 the end of a function, the end label is allowed to be even. This is
2083 necessary because a following non-MIPS16 function may also need EH
2084 information for its first instruction.
2085
2086 Thus a MIPS16 region may be terminated by an ISA-encoded or a
2087 non-ISA-encoded address. This probably isn't ideal, but it is
2088 the traditional (legacy) behavior. It is therefore only safe
2089 to search MIPS EH regions for an _odd-valued_ address.
2090
2091 Masking off the ISA bit means that the target-independent code
2092 will search for "(RA & -2) - 1", which is guaranteed to be odd. */
2093 #define MASK_RETURN_ADDR GEN_INT (-2)
2094
2095
2096 /* Similarly, don't use the least-significant bit to tell pointers to
2097 code from vtable index. */
2098
2099 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
2100
2101 /* The eliminations to $17 are only used for mips16 code. See the
2102 definition of HARD_FRAME_POINTER_REGNUM. */
2103
2104 #define ELIMINABLE_REGS \
2105 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2106 { ARG_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2107 { ARG_POINTER_REGNUM, GP_REG_FIRST + 17}, \
2108 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2109 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2110 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 17}}
2111
2112 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2113 (OFFSET) = mips_initial_elimination_offset ((FROM), (TO))
2114
2115 /* Allocate stack space for arguments at the beginning of each function. */
2116 #define ACCUMULATE_OUTGOING_ARGS 1
2117
2118 /* The argument pointer always points to the first argument. */
2119 #define FIRST_PARM_OFFSET(FNDECL) 0
2120
2121 /* o32 and o64 reserve stack space for all argument registers. */
2122 #define REG_PARM_STACK_SPACE(FNDECL) \
2123 (TARGET_OLDABI \
2124 ? (MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD) \
2125 : 0)
2126
2127 /* Define this if it is the responsibility of the caller to
2128 allocate the area reserved for arguments passed in registers.
2129 If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
2130 of this macro is to determine whether the space is included in
2131 `crtl->outgoing_args_size'. */
2132 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
2133
2134 #define STACK_BOUNDARY (TARGET_NEWABI ? 128 : 64)
2135 \f
2136 /* Symbolic macros for the registers used to return integer and floating
2137 point values. */
2138
2139 #define GP_RETURN (GP_REG_FIRST + 2)
2140 #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0))
2141
2142 #define MAX_ARGS_IN_REGISTERS (TARGET_OLDABI ? 4 : 8)
2143
2144 /* Symbolic macros for the first/last argument registers. */
2145
2146 #define GP_ARG_FIRST (GP_REG_FIRST + 4)
2147 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2148 #define FP_ARG_FIRST (FP_REG_FIRST + 12)
2149 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2150
2151 /* 1 if N is a possible register number for function argument passing.
2152 We have no FP argument registers when soft-float. When FP registers
2153 are 32 bits, we can't directly reference the odd numbered ones. */
2154
2155 #define FUNCTION_ARG_REGNO_P(N) \
2156 ((IN_RANGE((N), GP_ARG_FIRST, GP_ARG_LAST) \
2157 || (IN_RANGE((N), FP_ARG_FIRST, FP_ARG_LAST))) \
2158 && !fixed_regs[N])
2159 \f
2160 /* This structure has to cope with two different argument allocation
2161 schemes. Most MIPS ABIs view the arguments as a structure, of which
2162 the first N words go in registers and the rest go on the stack. If I
2163 < N, the Ith word might go in Ith integer argument register or in a
2164 floating-point register. For these ABIs, we only need to remember
2165 the offset of the current argument into the structure.
2166
2167 The EABI instead allocates the integer and floating-point arguments
2168 separately. The first N words of FP arguments go in FP registers,
2169 the rest go on the stack. Likewise, the first N words of the other
2170 arguments go in integer registers, and the rest go on the stack. We
2171 need to maintain three counts: the number of integer registers used,
2172 the number of floating-point registers used, and the number of words
2173 passed on the stack.
2174
2175 We could keep separate information for the two ABIs (a word count for
2176 the standard ABIs, and three separate counts for the EABI). But it
2177 seems simpler to view the standard ABIs as forms of EABI that do not
2178 allocate floating-point registers.
2179
2180 So for the standard ABIs, the first N words are allocated to integer
2181 registers, and mips_function_arg decides on an argument-by-argument
2182 basis whether that argument should really go in an integer register,
2183 or in a floating-point one. */
2184
2185 typedef struct mips_args {
2186 /* Always true for varargs functions. Otherwise true if at least
2187 one argument has been passed in an integer register. */
2188 int gp_reg_found;
2189
2190 /* The number of arguments seen so far. */
2191 unsigned int arg_number;
2192
2193 /* The number of integer registers used so far. For all ABIs except
2194 EABI, this is the number of words that have been added to the
2195 argument structure, limited to MAX_ARGS_IN_REGISTERS. */
2196 unsigned int num_gprs;
2197
2198 /* For EABI, the number of floating-point registers used so far. */
2199 unsigned int num_fprs;
2200
2201 /* The number of words passed on the stack. */
2202 unsigned int stack_words;
2203
2204 /* On the mips16, we need to keep track of which floating point
2205 arguments were passed in general registers, but would have been
2206 passed in the FP regs if this were a 32-bit function, so that we
2207 can move them to the FP regs if we wind up calling a 32-bit
2208 function. We record this information in fp_code, encoded in base
2209 four. A zero digit means no floating point argument, a one digit
2210 means an SFmode argument, and a two digit means a DFmode argument,
2211 and a three digit is not used. The low order digit is the first
2212 argument. Thus 6 == 1 * 4 + 2 means a DFmode argument followed by
2213 an SFmode argument. ??? A more sophisticated approach will be
2214 needed if MIPS_ABI != ABI_32. */
2215 int fp_code;
2216
2217 /* True if the function has a prototype. */
2218 int prototype;
2219 } CUMULATIVE_ARGS;
2220
2221 /* Initialize a variable CUM of type CUMULATIVE_ARGS
2222 for a call to a function whose data type is FNTYPE.
2223 For a library call, FNTYPE is 0. */
2224
2225 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
2226 mips_init_cumulative_args (&CUM, FNTYPE)
2227
2228 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
2229 (mips_pad_arg_upward (MODE, TYPE) ? upward : downward)
2230
2231 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
2232 (mips_pad_reg_upward (MODE, TYPE) ? upward : downward)
2233
2234 /* True if using EABI and varargs can be passed in floating-point
2235 registers. Under these conditions, we need a more complex form
2236 of va_list, which tracks GPR, FPR and stack arguments separately. */
2237 #define EABI_FLOAT_VARARGS_P \
2238 (mips_abi == ABI_EABI && UNITS_PER_FPVALUE >= UNITS_PER_DOUBLE)
2239
2240 \f
2241 #define EPILOGUE_USES(REGNO) mips_epilogue_uses (REGNO)
2242
2243 /* Treat LOC as a byte offset from the stack pointer and round it up
2244 to the next fully-aligned offset. */
2245 #define MIPS_STACK_ALIGN(LOC) \
2246 (TARGET_NEWABI ? ((LOC) + 15) & -16 : ((LOC) + 7) & -8)
2247
2248 \f
2249 /* Output assembler code to FILE to increment profiler label # LABELNO
2250 for profiling a function entry. */
2251
2252 #define FUNCTION_PROFILER(FILE, LABELNO) mips_function_profiler ((FILE))
2253
2254 /* The profiler preserves all interesting registers, including $31. */
2255 #define MIPS_SAVE_REG_FOR_PROFILING_P(REGNO) false
2256
2257 /* No mips port has ever used the profiler counter word, so don't emit it
2258 or the label for it. */
2259
2260 #define NO_PROFILE_COUNTERS 1
2261
2262 /* Define this macro if the code for function profiling should come
2263 before the function prologue. Normally, the profiling code comes
2264 after. */
2265
2266 /* #define PROFILE_BEFORE_PROLOGUE */
2267
2268 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
2269 the stack pointer does not matter. The value is tested only in
2270 functions that have frame pointers.
2271 No definition is equivalent to always zero. */
2272
2273 #define EXIT_IGNORE_STACK 1
2274
2275 \f
2276 /* Trampolines are a block of code followed by two pointers. */
2277
2278 #define TRAMPOLINE_SIZE \
2279 (mips_trampoline_code_size () + GET_MODE_SIZE (ptr_mode) * 2)
2280
2281 /* Forcing a 64-bit alignment for 32-bit targets allows us to load two
2282 pointers from a single LUI base. */
2283
2284 #define TRAMPOLINE_ALIGNMENT 64
2285
2286 /* mips_trampoline_init calls this library function to flush
2287 program and data caches. */
2288
2289 #ifndef CACHE_FLUSH_FUNC
2290 #define CACHE_FLUSH_FUNC "_flush_cache"
2291 #endif
2292
2293 #define MIPS_ICACHE_SYNC(ADDR, SIZE) \
2294 /* Flush both caches. We need to flush the data cache in case \
2295 the system has a write-back cache. */ \
2296 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func), \
2297 LCT_NORMAL, VOIDmode, 3, ADDR, Pmode, SIZE, Pmode, \
2298 GEN_INT (3), TYPE_MODE (integer_type_node))
2299
2300 \f
2301 /* Addressing modes, and classification of registers for them. */
2302
2303 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
2304 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2305 mips_regno_mode_ok_for_base_p (REGNO, MODE, 1)
2306 \f
2307 /* Maximum number of registers that can appear in a valid memory address. */
2308
2309 #define MAX_REGS_PER_ADDRESS 1
2310
2311 /* Check for constness inline but use mips_legitimate_address_p
2312 to check whether a constant really is an address. */
2313
2314 #define CONSTANT_ADDRESS_P(X) \
2315 (CONSTANT_P (X) && memory_address_p (SImode, X))
2316
2317 /* This handles the magic '..CURRENT_FUNCTION' symbol, which means
2318 'the start of the function that this code is output in'. */
2319
2320 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
2321 if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
2322 asm_fprintf ((FILE), "%U%s", \
2323 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
2324 else \
2325 asm_fprintf ((FILE), "%U%s", (NAME))
2326 \f
2327 /* Flag to mark a function decl symbol that requires a long call. */
2328 #define SYMBOL_FLAG_LONG_CALL (SYMBOL_FLAG_MACH_DEP << 0)
2329 #define SYMBOL_REF_LONG_CALL_P(X) \
2330 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_LONG_CALL) != 0)
2331
2332 /* This flag marks functions that cannot be lazily bound. */
2333 #define SYMBOL_FLAG_BIND_NOW (SYMBOL_FLAG_MACH_DEP << 1)
2334 #define SYMBOL_REF_BIND_NOW_P(RTX) \
2335 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_BIND_NOW) != 0)
2336
2337 /* True if we're generating a form of MIPS16 code in which jump tables
2338 are stored in the text section and encoded as 16-bit PC-relative
2339 offsets. This is only possible when general text loads are allowed,
2340 since the table access itself will be an "lh" instruction. If the
2341 PC-relative offsets grow too large, 32-bit offsets are used instead. */
2342 #define TARGET_MIPS16_SHORT_JUMP_TABLES TARGET_MIPS16_TEXT_LOADS
2343
2344 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_MIPS16_SHORT_JUMP_TABLES
2345
2346 #define CASE_VECTOR_MODE (TARGET_MIPS16_SHORT_JUMP_TABLES ? SImode : ptr_mode)
2347
2348 /* Only use short offsets if their range will not overflow. */
2349 #define CASE_VECTOR_SHORTEN_MODE(MIN, MAX, BODY) \
2350 (!TARGET_MIPS16_SHORT_JUMP_TABLES ? ptr_mode \
2351 : ((MIN) >= -32768 && (MAX) < 32768) ? HImode \
2352 : SImode)
2353
2354 #define CASE_VECTOR_PC_RELATIVE TARGET_MIPS16_SHORT_JUMP_TABLES
2355
2356 /* Define this as 1 if `char' should by default be signed; else as 0. */
2357 #ifndef DEFAULT_SIGNED_CHAR
2358 #define DEFAULT_SIGNED_CHAR 1
2359 #endif
2360
2361 /* Although LDC1 and SDC1 provide 64-bit moves on 32-bit targets,
2362 we generally don't want to use them for copying arbitrary data.
2363 A single N-word move is usually the same cost as N single-word moves. */
2364 #define MOVE_MAX UNITS_PER_WORD
2365 #define MAX_MOVE_MAX 8
2366
2367 /* Define this macro as a C expression which is nonzero if
2368 accessing less than a word of memory (i.e. a `char' or a
2369 `short') is no faster than accessing a word of memory, i.e., if
2370 such access require more than one instruction or if there is no
2371 difference in cost between byte and (aligned) word loads.
2372
2373 On RISC machines, it tends to generate better code to define
2374 this as 1, since it avoids making a QI or HI mode register.
2375
2376 But, generating word accesses for -mips16 is generally bad as shifts
2377 (often extended) would be needed for byte accesses. */
2378 #define SLOW_BYTE_ACCESS (!TARGET_MIPS16)
2379
2380 /* Standard MIPS integer shifts truncate the shift amount to the
2381 width of the shifted operand. However, Loongson vector shifts
2382 do not truncate the shift amount at all. */
2383 #define SHIFT_COUNT_TRUNCATED (!TARGET_LOONGSON_VECTORS)
2384
2385 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
2386 is done just by pretending it is already truncated. */
2387 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) \
2388 (TARGET_64BIT ? ((INPREC) <= 32 || (OUTPREC) > 32) : 1)
2389
2390
2391 /* Specify the machine mode that pointers have.
2392 After generation of rtl, the compiler makes no further distinction
2393 between pointers and any other objects of this machine mode. */
2394
2395 #ifndef Pmode
2396 #define Pmode (TARGET_64BIT && TARGET_LONG64 ? DImode : SImode)
2397 #endif
2398
2399 /* Give call MEMs SImode since it is the "most permissive" mode
2400 for both 32-bit and 64-bit targets. */
2401
2402 #define FUNCTION_MODE SImode
2403
2404 \f
2405 /* We allocate $fcc registers by hand and can't cope with moves of
2406 CCmode registers to and from pseudos (or memory). */
2407 #define AVOID_CCMODE_COPIES
2408
2409 /* A C expression for the cost of a branch instruction. A value of
2410 1 is the default; other values are interpreted relative to that. */
2411
2412 #define BRANCH_COST(speed_p, predictable_p) mips_branch_cost
2413 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
2414
2415 /* If defined, modifies the length assigned to instruction INSN as a
2416 function of the context in which it is used. LENGTH is an lvalue
2417 that contains the initially computed length of the insn and should
2418 be updated with the correct length of the insn. */
2419 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
2420 ((LENGTH) = mips_adjust_insn_length ((INSN), (LENGTH)))
2421
2422 /* Return the asm template for a non-MIPS16 conditional branch instruction.
2423 OPCODE is the opcode's mnemonic and OPERANDS is the asm template for
2424 its operands. */
2425 #define MIPS_BRANCH(OPCODE, OPERANDS) \
2426 "%*" OPCODE "%?\t" OPERANDS "%/"
2427
2428 /* Return an asm string that forces INSN to be treated as an absolute
2429 J or JAL instruction instead of an assembler macro. */
2430 #define MIPS_ABSOLUTE_JUMP(INSN) \
2431 (TARGET_ABICALLS_PIC2 \
2432 ? ".option\tpic0\n\t" INSN "\n\t.option\tpic2" \
2433 : INSN)
2434
2435 /* Return the asm template for a call. INSN is the instruction's mnemonic
2436 ("j" or "jal"), OPERANDS are its operands, TARGET_OPNO is the operand
2437 number of the target. SIZE_OPNO is the operand number of the argument size
2438 operand that can optionally hold the call attributes. If SIZE_OPNO is not
2439 -1 and the call is indirect, use the function symbol from the call
2440 attributes to attach a R_MIPS_JALR relocation to the call.
2441
2442 When generating GOT code without explicit relocation operators,
2443 all calls should use assembly macros. Otherwise, all indirect
2444 calls should use "jr" or "jalr"; we will arrange to restore $gp
2445 afterwards if necessary. Finally, we can only generate direct
2446 calls for -mabicalls by temporarily switching to non-PIC mode. */
2447 #define MIPS_CALL(INSN, OPERANDS, TARGET_OPNO, SIZE_OPNO) \
2448 (TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS \
2449 ? "%*" INSN "\t%" #TARGET_OPNO "%/" \
2450 : (REG_P (OPERANDS[TARGET_OPNO]) \
2451 && mips_get_pic_call_symbol (OPERANDS, SIZE_OPNO)) \
2452 ? ("%*.reloc\t1f,R_MIPS_JALR,%" #SIZE_OPNO "\n" \
2453 "1:\t" INSN "r\t%" #TARGET_OPNO "%/") \
2454 : REG_P (OPERANDS[TARGET_OPNO]) \
2455 ? "%*" INSN "r\t%" #TARGET_OPNO "%/" \
2456 : MIPS_ABSOLUTE_JUMP ("%*" INSN "\t%" #TARGET_OPNO "%/"))
2457 \f
2458 /* Control the assembler format that we output. */
2459
2460 /* Output to assembler file text saying following lines
2461 may contain character constants, extra white space, comments, etc. */
2462
2463 #ifndef ASM_APP_ON
2464 #define ASM_APP_ON " #APP\n"
2465 #endif
2466
2467 /* Output to assembler file text saying following lines
2468 no longer contain unusual constructs. */
2469
2470 #ifndef ASM_APP_OFF
2471 #define ASM_APP_OFF " #NO_APP\n"
2472 #endif
2473
2474 #define REGISTER_NAMES \
2475 { "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
2476 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
2477 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
2478 "$24", "$25", "$26", "$27", "$28", "$sp", "$fp", "$31", \
2479 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \
2480 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \
2481 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \
2482 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \
2483 "hi", "lo", "", "$fcc0","$fcc1","$fcc2","$fcc3","$fcc4", \
2484 "$fcc5","$fcc6","$fcc7","", "$cprestore", "$arg", "$frame", "$fakec", \
2485 "$c0r0", "$c0r1", "$c0r2", "$c0r3", "$c0r4", "$c0r5", "$c0r6", "$c0r7", \
2486 "$c0r8", "$c0r9", "$c0r10","$c0r11","$c0r12","$c0r13","$c0r14","$c0r15", \
2487 "$c0r16","$c0r17","$c0r18","$c0r19","$c0r20","$c0r21","$c0r22","$c0r23", \
2488 "$c0r24","$c0r25","$c0r26","$c0r27","$c0r28","$c0r29","$c0r30","$c0r31", \
2489 "$c2r0", "$c2r1", "$c2r2", "$c2r3", "$c2r4", "$c2r5", "$c2r6", "$c2r7", \
2490 "$c2r8", "$c2r9", "$c2r10","$c2r11","$c2r12","$c2r13","$c2r14","$c2r15", \
2491 "$c2r16","$c2r17","$c2r18","$c2r19","$c2r20","$c2r21","$c2r22","$c2r23", \
2492 "$c2r24","$c2r25","$c2r26","$c2r27","$c2r28","$c2r29","$c2r30","$c2r31", \
2493 "$c3r0", "$c3r1", "$c3r2", "$c3r3", "$c3r4", "$c3r5", "$c3r6", "$c3r7", \
2494 "$c3r8", "$c3r9", "$c3r10","$c3r11","$c3r12","$c3r13","$c3r14","$c3r15", \
2495 "$c3r16","$c3r17","$c3r18","$c3r19","$c3r20","$c3r21","$c3r22","$c3r23", \
2496 "$c3r24","$c3r25","$c3r26","$c3r27","$c3r28","$c3r29","$c3r30","$c3r31", \
2497 "$ac1hi","$ac1lo","$ac2hi","$ac2lo","$ac3hi","$ac3lo","$dsp_po","$dsp_sc", \
2498 "$dsp_ca","$dsp_ou","$dsp_cc","$dsp_ef" }
2499
2500 /* List the "software" names for each register. Also list the numerical
2501 names for $fp and $sp. */
2502
2503 #define ADDITIONAL_REGISTER_NAMES \
2504 { \
2505 { "$29", 29 + GP_REG_FIRST }, \
2506 { "$30", 30 + GP_REG_FIRST }, \
2507 { "at", 1 + GP_REG_FIRST }, \
2508 { "v0", 2 + GP_REG_FIRST }, \
2509 { "v1", 3 + GP_REG_FIRST }, \
2510 { "a0", 4 + GP_REG_FIRST }, \
2511 { "a1", 5 + GP_REG_FIRST }, \
2512 { "a2", 6 + GP_REG_FIRST }, \
2513 { "a3", 7 + GP_REG_FIRST }, \
2514 { "t0", 8 + GP_REG_FIRST }, \
2515 { "t1", 9 + GP_REG_FIRST }, \
2516 { "t2", 10 + GP_REG_FIRST }, \
2517 { "t3", 11 + GP_REG_FIRST }, \
2518 { "t4", 12 + GP_REG_FIRST }, \
2519 { "t5", 13 + GP_REG_FIRST }, \
2520 { "t6", 14 + GP_REG_FIRST }, \
2521 { "t7", 15 + GP_REG_FIRST }, \
2522 { "s0", 16 + GP_REG_FIRST }, \
2523 { "s1", 17 + GP_REG_FIRST }, \
2524 { "s2", 18 + GP_REG_FIRST }, \
2525 { "s3", 19 + GP_REG_FIRST }, \
2526 { "s4", 20 + GP_REG_FIRST }, \
2527 { "s5", 21 + GP_REG_FIRST }, \
2528 { "s6", 22 + GP_REG_FIRST }, \
2529 { "s7", 23 + GP_REG_FIRST }, \
2530 { "t8", 24 + GP_REG_FIRST }, \
2531 { "t9", 25 + GP_REG_FIRST }, \
2532 { "k0", 26 + GP_REG_FIRST }, \
2533 { "k1", 27 + GP_REG_FIRST }, \
2534 { "gp", 28 + GP_REG_FIRST }, \
2535 { "sp", 29 + GP_REG_FIRST }, \
2536 { "fp", 30 + GP_REG_FIRST }, \
2537 { "ra", 31 + GP_REG_FIRST } \
2538 }
2539
2540 #define DBR_OUTPUT_SEQEND(STREAM) \
2541 do \
2542 { \
2543 /* Undo the effect of '%*'. */ \
2544 mips_pop_asm_switch (&mips_nomacro); \
2545 mips_pop_asm_switch (&mips_noreorder); \
2546 /* Emit a blank line after the delay slot for emphasis. */ \
2547 fputs ("\n", STREAM); \
2548 } \
2549 while (0)
2550
2551 /* The MIPS implementation uses some labels for its own purpose. The
2552 following lists what labels are created, and are all formed by the
2553 pattern $L[a-z].*. The machine independent portion of GCC creates
2554 labels matching: $L[A-Z][0-9]+ and $L[0-9]+.
2555
2556 LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt.
2557 $Lb[0-9]+ Begin blocks for MIPS debug support
2558 $Lc[0-9]+ Label for use in s<xx> operation.
2559 $Le[0-9]+ End blocks for MIPS debug support */
2560
2561 #undef ASM_DECLARE_OBJECT_NAME
2562 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
2563 mips_declare_object (STREAM, NAME, "", ":\n")
2564
2565 /* Globalizing directive for a label. */
2566 #define GLOBAL_ASM_OP "\t.globl\t"
2567
2568 /* This says how to define a global common symbol. */
2569
2570 #define ASM_OUTPUT_ALIGNED_DECL_COMMON mips_output_aligned_decl_common
2571
2572 /* This says how to define a local common symbol (i.e., not visible to
2573 linker). */
2574
2575 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
2576 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
2577 mips_declare_common_object (STREAM, NAME, "\n\t.lcomm\t", SIZE, ALIGN, false)
2578 #endif
2579
2580 /* This says how to output an external. It would be possible not to
2581 output anything and let undefined symbol become external. However
2582 the assembler uses length information on externals to allocate in
2583 data/sdata bss/sbss, thereby saving exec time. */
2584
2585 #undef ASM_OUTPUT_EXTERNAL
2586 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \
2587 mips_output_external(STREAM,DECL,NAME)
2588
2589 /* This is how to declare a function name. The actual work of
2590 emitting the label is moved to function_prologue, so that we can
2591 get the line number correctly emitted before the .ent directive,
2592 and after any .file directives. Define as empty so that the function
2593 is not declared before the .ent directive elsewhere. */
2594
2595 #undef ASM_DECLARE_FUNCTION_NAME
2596 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL)
2597
2598 /* This is how to store into the string LABEL
2599 the symbol_ref name of an internal numbered label where
2600 PREFIX is the class of label and NUM is the number within the class.
2601 This is suitable for output with `assemble_name'. */
2602
2603 #undef ASM_GENERATE_INTERNAL_LABEL
2604 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
2605 sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
2606
2607 /* Print debug labels as "foo = ." rather than "foo:" because they should
2608 represent a byte pointer rather than an ISA-encoded address. This is
2609 particularly important for code like:
2610
2611 $LFBxxx = .
2612 .cfi_startproc
2613 ...
2614 .section .gcc_except_table,...
2615 ...
2616 .uleb128 foo-$LFBxxx
2617
2618 The .uleb128 requies $LFBxxx to match the FDE start address, which is
2619 likewise a byte pointer rather than an ISA-encoded address.
2620
2621 At the time of writing, this hook is not used for the function end
2622 label:
2623
2624 $LFExxx:
2625 .end foo
2626
2627 But this doesn't matter, because GAS doesn't treat a pre-.end label
2628 as a MIPS16 one anyway. */
2629
2630 #define ASM_OUTPUT_DEBUG_LABEL(FILE, PREFIX, NUM) \
2631 fprintf (FILE, "%s%s%d = .\n", LOCAL_LABEL_PREFIX, PREFIX, NUM)
2632
2633 /* This is how to output an element of a case-vector that is absolute. */
2634
2635 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2636 fprintf (STREAM, "\t%s\t%sL%d\n", \
2637 ptr_mode == DImode ? ".dword" : ".word", \
2638 LOCAL_LABEL_PREFIX, \
2639 VALUE)
2640
2641 /* This is how to output an element of a case-vector. We can make the
2642 entries PC-relative in MIPS16 code and GP-relative when .gp(d)word
2643 is supported. */
2644
2645 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
2646 do { \
2647 if (TARGET_MIPS16_SHORT_JUMP_TABLES) \
2648 { \
2649 if (GET_MODE (BODY) == HImode) \
2650 fprintf (STREAM, "\t.half\t%sL%d-%sL%d\n", \
2651 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
2652 else \
2653 fprintf (STREAM, "\t.word\t%sL%d-%sL%d\n", \
2654 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
2655 } \
2656 else if (TARGET_GPWORD) \
2657 fprintf (STREAM, "\t%s\t%sL%d\n", \
2658 ptr_mode == DImode ? ".gpdword" : ".gpword", \
2659 LOCAL_LABEL_PREFIX, VALUE); \
2660 else if (TARGET_RTP_PIC) \
2661 { \
2662 /* Make the entry relative to the start of the function. */ \
2663 rtx fnsym = XEXP (DECL_RTL (current_function_decl), 0); \
2664 fprintf (STREAM, "\t%s\t%sL%d-", \
2665 Pmode == DImode ? ".dword" : ".word", \
2666 LOCAL_LABEL_PREFIX, VALUE); \
2667 assemble_name (STREAM, XSTR (fnsym, 0)); \
2668 fprintf (STREAM, "\n"); \
2669 } \
2670 else \
2671 fprintf (STREAM, "\t%s\t%sL%d\n", \
2672 ptr_mode == DImode ? ".dword" : ".word", \
2673 LOCAL_LABEL_PREFIX, VALUE); \
2674 } while (0)
2675
2676 /* This is how to output an assembler line
2677 that says to advance the location counter
2678 to a multiple of 2**LOG bytes. */
2679
2680 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
2681 fprintf (STREAM, "\t.align\t%d\n", (LOG))
2682
2683 /* This is how to output an assembler line to advance the location
2684 counter by SIZE bytes. */
2685
2686 #undef ASM_OUTPUT_SKIP
2687 #define ASM_OUTPUT_SKIP(STREAM,SIZE) \
2688 fprintf (STREAM, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))
2689
2690 /* This is how to output a string. */
2691 #undef ASM_OUTPUT_ASCII
2692 #define ASM_OUTPUT_ASCII mips_output_ascii
2693
2694 \f
2695 /* Default to -G 8 */
2696 #ifndef MIPS_DEFAULT_GVALUE
2697 #define MIPS_DEFAULT_GVALUE 8
2698 #endif
2699
2700 /* Define the strings to put out for each section in the object file. */
2701 #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
2702 #define DATA_SECTION_ASM_OP "\t.data" /* large data */
2703
2704 #undef READONLY_DATA_SECTION_ASM_OP
2705 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" /* read-only data */
2706 \f
2707 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
2708 do \
2709 { \
2710 fprintf (STREAM, "\t%s\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \
2711 TARGET_64BIT ? "daddiu" : "addiu", \
2712 reg_names[STACK_POINTER_REGNUM], \
2713 reg_names[STACK_POINTER_REGNUM], \
2714 TARGET_64BIT ? "sd" : "sw", \
2715 reg_names[REGNO], \
2716 reg_names[STACK_POINTER_REGNUM]); \
2717 } \
2718 while (0)
2719
2720 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
2721 do \
2722 { \
2723 mips_push_asm_switch (&mips_noreorder); \
2724 fprintf (STREAM, "\t%s\t%s,0(%s)\n\t%s\t%s,%s,8\n", \
2725 TARGET_64BIT ? "ld" : "lw", \
2726 reg_names[REGNO], \
2727 reg_names[STACK_POINTER_REGNUM], \
2728 TARGET_64BIT ? "daddu" : "addu", \
2729 reg_names[STACK_POINTER_REGNUM], \
2730 reg_names[STACK_POINTER_REGNUM]); \
2731 mips_pop_asm_switch (&mips_noreorder); \
2732 } \
2733 while (0)
2734
2735 /* How to start an assembler comment.
2736 The leading space is important (the mips native assembler requires it). */
2737 #ifndef ASM_COMMENT_START
2738 #define ASM_COMMENT_START " #"
2739 #endif
2740 \f
2741 #undef SIZE_TYPE
2742 #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
2743
2744 #undef PTRDIFF_TYPE
2745 #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
2746
2747 /* The maximum number of bytes that can be copied by one iteration of
2748 a movmemsi loop; see mips_block_move_loop. */
2749 #define MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER \
2750 (UNITS_PER_WORD * 4)
2751
2752 /* The maximum number of bytes that can be copied by a straight-line
2753 implementation of movmemsi; see mips_block_move_straight. We want
2754 to make sure that any loop-based implementation will iterate at
2755 least twice. */
2756 #define MIPS_MAX_MOVE_BYTES_STRAIGHT \
2757 (MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER * 2)
2758
2759 /* The base cost of a memcpy call, for MOVE_RATIO and friends. These
2760 values were determined experimentally by benchmarking with CSiBE.
2761 In theory, the call overhead is higher for TARGET_ABICALLS (especially
2762 for o32 where we have to restore $gp afterwards as well as make an
2763 indirect call), but in practice, bumping this up higher for
2764 TARGET_ABICALLS doesn't make much difference to code size. */
2765
2766 #define MIPS_CALL_RATIO 8
2767
2768 /* Any loop-based implementation of movmemsi will have at least
2769 MIPS_MAX_MOVE_BYTES_STRAIGHT / UNITS_PER_WORD memory-to-memory
2770 moves, so allow individual copies of fewer elements.
2771
2772 When movmemsi is not available, use a value approximating
2773 the length of a memcpy call sequence, so that move_by_pieces
2774 will generate inline code if it is shorter than a function call.
2775 Since move_by_pieces_ninsns counts memory-to-memory moves, but
2776 we'll have to generate a load/store pair for each, halve the
2777 value of MIPS_CALL_RATIO to take that into account. */
2778
2779 #define MOVE_RATIO(speed) \
2780 (HAVE_movmemsi \
2781 ? MIPS_MAX_MOVE_BYTES_STRAIGHT / MOVE_MAX \
2782 : MIPS_CALL_RATIO / 2)
2783
2784 #define MOVE_BY_PIECES_P(SIZE, ALIGN) \
2785 mips_move_by_pieces_p (SIZE, ALIGN)
2786
2787 /* For CLEAR_RATIO, when optimizing for size, give a better estimate
2788 of the length of a memset call, but use the default otherwise. */
2789
2790 #define CLEAR_RATIO(speed)\
2791 ((speed) ? 15 : MIPS_CALL_RATIO)
2792
2793 /* This is similar to CLEAR_RATIO, but for a non-zero constant, so when
2794 optimizing for size adjust the ratio to account for the overhead of
2795 loading the constant and replicating it across the word. */
2796
2797 #define SET_RATIO(speed) \
2798 ((speed) ? 15 : MIPS_CALL_RATIO - 2)
2799
2800 #define STORE_BY_PIECES_P(SIZE, ALIGN) \
2801 mips_store_by_pieces_p (SIZE, ALIGN)
2802 \f
2803 /* Since the bits of the _init and _fini function is spread across
2804 many object files, each potentially with its own GP, we must assume
2805 we need to load our GP. We don't preserve $gp or $ra, since each
2806 init/fini chunk is supposed to initialize $gp, and crti/crtn
2807 already take care of preserving $ra and, when appropriate, $gp. */
2808 #if (defined _ABIO32 && _MIPS_SIM == _ABIO32)
2809 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2810 asm (SECTION_OP "\n\
2811 .set push\n\
2812 .set nomips16\n\
2813 .set noreorder\n\
2814 bal 1f\n\
2815 nop\n\
2816 1: .cpload $31\n\
2817 .set reorder\n\
2818 jal " USER_LABEL_PREFIX #FUNC "\n\
2819 .set pop\n\
2820 " TEXT_SECTION_ASM_OP);
2821 #endif /* Switch to #elif when we're no longer limited by K&R C. */
2822 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
2823 || (defined _ABI64 && _MIPS_SIM == _ABI64)
2824 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2825 asm (SECTION_OP "\n\
2826 .set push\n\
2827 .set nomips16\n\
2828 .set noreorder\n\
2829 bal 1f\n\
2830 nop\n\
2831 1: .set reorder\n\
2832 .cpsetup $31, $2, 1b\n\
2833 jal " USER_LABEL_PREFIX #FUNC "\n\
2834 .set pop\n\
2835 " TEXT_SECTION_ASM_OP);
2836 #endif
2837
2838 #ifndef HAVE_AS_TLS
2839 #define HAVE_AS_TLS 0
2840 #endif
2841
2842 #ifndef USED_FOR_TARGET
2843 /* Information about ".set noFOO; ...; .set FOO" blocks. */
2844 struct mips_asm_switch {
2845 /* The FOO in the description above. */
2846 const char *name;
2847
2848 /* The current block nesting level, or 0 if we aren't in a block. */
2849 int nesting_level;
2850 };
2851
2852 extern const enum reg_class mips_regno_to_class[];
2853 extern bool mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
2854 extern const char *current_function_file; /* filename current function is in */
2855 extern int num_source_filenames; /* current .file # */
2856 extern struct mips_asm_switch mips_noreorder;
2857 extern struct mips_asm_switch mips_nomacro;
2858 extern struct mips_asm_switch mips_noat;
2859 extern int mips_dbx_regno[];
2860 extern int mips_dwarf_regno[];
2861 extern bool mips_split_p[];
2862 extern bool mips_split_hi_p[];
2863 extern bool mips_use_pcrel_pool_p[];
2864 extern const char *mips_lo_relocs[];
2865 extern const char *mips_hi_relocs[];
2866 extern enum processor mips_arch; /* which cpu to codegen for */
2867 extern enum processor mips_tune; /* which cpu to schedule for */
2868 extern int mips_isa; /* architectural level */
2869 extern const struct mips_cpu_info *mips_arch_info;
2870 extern const struct mips_cpu_info *mips_tune_info;
2871 extern bool mips_base_mips16;
2872 extern GTY(()) struct target_globals *mips16_globals;
2873 #endif
2874
2875 /* Enable querying of DFA units. */
2876 #define CPU_UNITS_QUERY 1
2877
2878 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
2879 mips_final_prescan_insn (INSN, OPVEC, NOPERANDS)
2880
2881 /* As on most targets, we want the .eh_frame section to be read-only where
2882 possible. And as on most targets, this means two things:
2883
2884 (a) Non-locally-binding pointers must have an indirect encoding,
2885 so that the addresses in the .eh_frame section itself become
2886 locally-binding.
2887
2888 (b) A shared library's .eh_frame section must encode locally-binding
2889 pointers in a relative (relocation-free) form.
2890
2891 However, MIPS has traditionally not allowed directives like:
2892
2893 .long x-.
2894
2895 in cases where "x" is in a different section, or is not defined in the
2896 same assembly file. We are therefore unable to emit the PC-relative
2897 form required by (b) at assembly time.
2898
2899 Fortunately, the linker is able to convert absolute addresses into
2900 PC-relative addresses on our behalf. Unfortunately, only certain
2901 versions of the linker know how to do this for indirect pointers,
2902 and for personality data. We must fall back on using writable
2903 .eh_frame sections for shared libraries if the linker does not
2904 support this feature. */
2905 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
2906 (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_absptr)
2907
2908 /* For switching between MIPS16 and non-MIPS16 modes. */
2909 #define SWITCHABLE_TARGET 1
2910
2911 /* Several named MIPS patterns depend on Pmode. These patterns have the
2912 form <NAME>_si for Pmode == SImode and <NAME>_di for Pmode == DImode.
2913 Add the appropriate suffix to generator function NAME and invoke it
2914 with arguments ARGS. */
2915 #define PMODE_INSN(NAME, ARGS) \
2916 (Pmode == SImode ? NAME ## _si ARGS : NAME ## _di ARGS)