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
4 Free Software Foundation, Inc.
5 Contributed by A. Lichnewsky (lich@inria.inria.fr).
6 Changed by Michael Meissner (meissner@osf.org).
7 64-bit r4000 support by Ian Lance Taylor (ian@cygnus.com) and
8 Brendan Eich (brendan@microunity.com).
10 This file is part of GCC.
12 GCC is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 3, or (at your option)
17 GCC is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with GCC; see the file COPYING3. If not see
24 <http://www.gnu.org/licenses/>. */
27 #include "config/vxworks-dummy.h"
29 /* MIPS external variables defined in mips.c. */
31 /* Which processor to schedule for. Since there is no difference between
32 a R2000 and R3000 in terms of the scheduler, we collapse them into
33 just an R3000. The elements of the enumeration must match exactly
34 the cpu attribute in the mips.md machine description. */
50 PROCESSOR_LOONGSON_2E,
51 PROCESSOR_LOONGSON_2F,
77 /* Costs of various operations on the different architectures. */
79 struct mips_rtx_cost_data
81 unsigned short fp_add;
82 unsigned short fp_mult_sf;
83 unsigned short fp_mult_df;
84 unsigned short fp_div_sf;
85 unsigned short fp_div_df;
86 unsigned short int_mult_si;
87 unsigned short int_mult_di;
88 unsigned short int_div_si;
89 unsigned short int_div_di;
90 unsigned short branch_cost;
91 unsigned short memory_latency;
94 /* Which ABI to use. ABI_32 (original 32, or o32), ABI_N32 (n32),
95 ABI_64 (n64) are all defined by SGI. ABI_O64 is o32 extended
96 to work on a 64-bit machine. */
104 /* Masks that affect tuning.
106 PTF_AVOID_BRANCHLIKELY
107 Set if it is usually not profitable to use branch-likely instructions
108 for this target, typically because the branches are always predicted
109 taken and so incur a large overhead when not taken. */
110 #define PTF_AVOID_BRANCHLIKELY 0x1
112 /* Information about one recognized processor. Defined here for the
113 benefit of TARGET_CPU_CPP_BUILTINS. */
114 struct mips_cpu_info {
115 /* The 'canonical' name of the processor as far as GCC is concerned.
116 It's typically a manufacturer's prefix followed by a numerical
117 designation. It should be lowercase. */
120 /* The internal processor number that most closely matches this
121 entry. Several processors can have the same value, if there's no
122 difference between them from GCC's point of view. */
123 enum processor_type cpu;
125 /* The ISA level that the processor implements. */
128 /* A mask of PTF_* values. */
129 unsigned int tune_flags;
132 /* Enumerates the setting of the -mcode-readable option. */
133 enum mips_code_readable_setting {
139 /* Macros to silence warnings about numbers being signed in traditional
140 C and unsigned in ISO C when compiled on 32-bit hosts. */
142 #define BITMASK_HIGH (((unsigned long)1) << 31) /* 0x80000000 */
143 #define BITMASK_UPPER16 ((unsigned long)0xffff << 16) /* 0xffff0000 */
144 #define BITMASK_LOWER16 ((unsigned long)0xffff) /* 0x0000ffff */
147 /* Run-time compilation parameters selecting different hardware subsets. */
149 /* True if we are generating position-independent VxWorks RTP code. */
150 #define TARGET_RTP_PIC (TARGET_VXWORKS_RTP && flag_pic)
152 /* True if the output file is marked as ".abicalls; .option pic0"
154 #define TARGET_ABICALLS_PIC0 \
155 (TARGET_ABSOLUTE_ABICALLS && TARGET_PLT)
157 /* True if the output file is marked as ".abicalls; .option pic2" (-KPIC). */
158 #define TARGET_ABICALLS_PIC2 \
159 (TARGET_ABICALLS && !TARGET_ABICALLS_PIC0)
161 /* True if the call patterns should be split into a jalr followed by
162 an instruction to restore $gp. It is only safe to split the load
163 from the call when every use of $gp is explicit. */
165 #define TARGET_SPLIT_CALLS \
166 (TARGET_EXPLICIT_RELOCS && TARGET_CALL_CLOBBERED_GP)
168 /* True if we're generating a form of -mabicalls in which we can use
169 operators like %hi and %lo to refer to locally-binding symbols.
170 We can only do this for -mno-shared, and only then if we can use
171 relocation operations instead of assembly macros. It isn't really
172 worth using absolute sequences for 64-bit symbols because GOT
173 accesses are so much shorter. */
175 #define TARGET_ABSOLUTE_ABICALLS \
178 && TARGET_EXPLICIT_RELOCS \
179 && !ABI_HAS_64BIT_SYMBOLS)
181 /* True if we can optimize sibling calls. For simplicity, we only
182 handle cases in which call_insn_operand will reject invalid
183 sibcall addresses. There are two cases in which this isn't true:
185 - TARGET_MIPS16. call_insn_operand accepts constant addresses
186 but there is no direct jump instruction. It isn't worth
187 using sibling calls in this case anyway; they would usually
188 be longer than normal calls.
190 - TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS. call_insn_operand
191 accepts global constants, but all sibcalls must be indirect. */
192 #define TARGET_SIBCALLS \
193 (!TARGET_MIPS16 && (!TARGET_USE_GOT || TARGET_EXPLICIT_RELOCS))
195 /* True if we need to use a global offset table to access some symbols. */
196 #define TARGET_USE_GOT (TARGET_ABICALLS || TARGET_RTP_PIC)
198 /* True if TARGET_USE_GOT and if $gp is a call-clobbered register. */
199 #define TARGET_CALL_CLOBBERED_GP (TARGET_ABICALLS && TARGET_OLDABI)
201 /* True if TARGET_USE_GOT and if $gp is a call-saved register. */
202 #define TARGET_CALL_SAVED_GP (TARGET_USE_GOT && !TARGET_CALL_CLOBBERED_GP)
204 /* True if indirect calls must use register class PIC_FN_ADDR_REG.
205 This is true for both the PIC and non-PIC VxWorks RTP modes. */
206 #define TARGET_USE_PIC_FN_ADDR_REG (TARGET_ABICALLS || TARGET_VXWORKS_RTP)
208 /* True if .gpword or .gpdword should be used for switch tables.
210 Although GAS does understand .gpdword, the SGI linker mishandles
211 the relocations GAS generates (R_MIPS_GPREL32 followed by R_MIPS_64).
212 We therefore disable GP-relative switch tables for n64 on IRIX targets. */
213 #define TARGET_GPWORD \
215 && !TARGET_ABSOLUTE_ABICALLS \
216 && !(mips_abi == ABI_64 && TARGET_IRIX))
218 /* Generate mips16 code */
219 #define TARGET_MIPS16 ((target_flags & MASK_MIPS16) != 0)
220 /* Generate mips16e code. Default 16bit ASE for mips32* and mips64* */
221 #define GENERATE_MIPS16E (TARGET_MIPS16 && mips_isa >= 32)
222 /* Generate mips16e register save/restore sequences. */
223 #define GENERATE_MIPS16E_SAVE_RESTORE (GENERATE_MIPS16E && mips_abi == ABI_32)
225 /* True if we're generating a form of MIPS16 code in which general
226 text loads are allowed. */
227 #define TARGET_MIPS16_TEXT_LOADS \
228 (TARGET_MIPS16 && mips_code_readable == CODE_READABLE_YES)
230 /* True if we're generating a form of MIPS16 code in which PC-relative
231 loads are allowed. */
232 #define TARGET_MIPS16_PCREL_LOADS \
233 (TARGET_MIPS16 && mips_code_readable >= CODE_READABLE_PCREL)
235 /* Generic ISA defines. */
236 #define ISA_MIPS1 (mips_isa == 1)
237 #define ISA_MIPS2 (mips_isa == 2)
238 #define ISA_MIPS3 (mips_isa == 3)
239 #define ISA_MIPS4 (mips_isa == 4)
240 #define ISA_MIPS32 (mips_isa == 32)
241 #define ISA_MIPS32R2 (mips_isa == 33)
242 #define ISA_MIPS64 (mips_isa == 64)
243 #define ISA_MIPS64R2 (mips_isa == 65)
245 /* Architecture target defines. */
246 #define TARGET_LOONGSON_2E (mips_arch == PROCESSOR_LOONGSON_2E)
247 #define TARGET_LOONGSON_2F (mips_arch == PROCESSOR_LOONGSON_2F)
248 #define TARGET_LOONGSON_2EF (TARGET_LOONGSON_2E || TARGET_LOONGSON_2F)
249 #define TARGET_MIPS3900 (mips_arch == PROCESSOR_R3900)
250 #define TARGET_MIPS4000 (mips_arch == PROCESSOR_R4000)
251 #define TARGET_MIPS4120 (mips_arch == PROCESSOR_R4120)
252 #define TARGET_MIPS4130 (mips_arch == PROCESSOR_R4130)
253 #define TARGET_MIPS5400 (mips_arch == PROCESSOR_R5400)
254 #define TARGET_MIPS5500 (mips_arch == PROCESSOR_R5500)
255 #define TARGET_MIPS7000 (mips_arch == PROCESSOR_R7000)
256 #define TARGET_MIPS9000 (mips_arch == PROCESSOR_R9000)
257 #define TARGET_OCTEON (mips_arch == PROCESSOR_OCTEON)
258 #define TARGET_SB1 (mips_arch == PROCESSOR_SB1 \
259 || mips_arch == PROCESSOR_SB1A)
260 #define TARGET_SR71K (mips_arch == PROCESSOR_SR71000)
262 /* Scheduling target defines. */
263 #define TUNE_20KC (mips_tune == PROCESSOR_20KC)
264 #define TUNE_24K (mips_tune == PROCESSOR_24KC \
265 || mips_tune == PROCESSOR_24KF2_1 \
266 || mips_tune == PROCESSOR_24KF1_1)
267 #define TUNE_74K (mips_tune == PROCESSOR_74KC \
268 || mips_tune == PROCESSOR_74KF2_1 \
269 || mips_tune == PROCESSOR_74KF1_1 \
270 || mips_tune == PROCESSOR_74KF3_2)
271 #define TUNE_LOONGSON_2EF (mips_tune == PROCESSOR_LOONGSON_2E \
272 || mips_tune == PROCESSOR_LOONGSON_2F)
273 #define TUNE_MIPS3000 (mips_tune == PROCESSOR_R3000)
274 #define TUNE_MIPS3900 (mips_tune == PROCESSOR_R3900)
275 #define TUNE_MIPS4000 (mips_tune == PROCESSOR_R4000)
276 #define TUNE_MIPS4120 (mips_tune == PROCESSOR_R4120)
277 #define TUNE_MIPS4130 (mips_tune == PROCESSOR_R4130)
278 #define TUNE_MIPS5000 (mips_tune == PROCESSOR_R5000)
279 #define TUNE_MIPS5400 (mips_tune == PROCESSOR_R5400)
280 #define TUNE_MIPS5500 (mips_tune == PROCESSOR_R5500)
281 #define TUNE_MIPS6000 (mips_tune == PROCESSOR_R6000)
282 #define TUNE_MIPS7000 (mips_tune == PROCESSOR_R7000)
283 #define TUNE_MIPS9000 (mips_tune == PROCESSOR_R9000)
284 #define TUNE_SB1 (mips_tune == PROCESSOR_SB1 \
285 || mips_tune == PROCESSOR_SB1A)
287 /* Whether vector modes and intrinsics for ST Microelectronics
288 Loongson-2E/2F processors should be enabled. In o32 pairs of
289 floating-point registers provide 64-bit values. */
290 #define TARGET_LOONGSON_VECTORS (TARGET_HARD_FLOAT_ABI \
291 && TARGET_LOONGSON_2EF)
293 /* True if the pre-reload scheduler should try to create chains of
294 multiply-add or multiply-subtract instructions. For example,
302 t1 will have a higher priority than t2 and t3 will have a higher
303 priority than t4. However, before reload, there is no dependence
304 between t1 and t3, and they can often have similar priorities.
305 The scheduler will then tend to prefer:
312 which stops us from making full use of macc/madd-style instructions.
313 This sort of situation occurs frequently in Fourier transforms and
316 To counter this, the TUNE_MACC_CHAINS code will reorder the ready
317 queue so that chained multiply-add and multiply-subtract instructions
318 appear ahead of any other instruction that is likely to clobber lo.
319 In the example above, if t2 and t3 become ready at the same time,
320 the code ensures that t2 is scheduled first.
322 Multiply-accumulate instructions are a bigger win for some targets
323 than others, so this macro is defined on an opt-in basis. */
324 #define TUNE_MACC_CHAINS (TUNE_MIPS5500 \
329 #define TARGET_OLDABI (mips_abi == ABI_32 || mips_abi == ABI_O64)
330 #define TARGET_NEWABI (mips_abi == ABI_N32 || mips_abi == ABI_64)
332 /* TARGET_HARD_FLOAT and TARGET_SOFT_FLOAT reflect whether the FPU is
333 directly accessible, while the command-line options select
334 TARGET_HARD_FLOAT_ABI and TARGET_SOFT_FLOAT_ABI to reflect the ABI
336 #define TARGET_HARD_FLOAT (TARGET_HARD_FLOAT_ABI && !TARGET_MIPS16)
337 #define TARGET_SOFT_FLOAT (TARGET_SOFT_FLOAT_ABI || TARGET_MIPS16)
339 /* IRIX specific stuff. */
340 #define TARGET_IRIX 0
341 #define TARGET_IRIX6 0
343 /* Define preprocessor macros for the -march and -mtune options.
344 PREFIX is either _MIPS_ARCH or _MIPS_TUNE, INFO is the selected
345 processor. If INFO's canonical name is "foo", define PREFIX to
346 be "foo", and define an additional macro PREFIX_FOO. */
347 #define MIPS_CPP_SET_PROCESSOR(PREFIX, INFO) \
352 macro = concat ((PREFIX), "_", (INFO)->name, NULL); \
353 for (p = macro; *p != 0; p++) \
356 builtin_define (macro); \
357 builtin_define_with_value ((PREFIX), (INFO)->name, 1); \
362 /* Target CPU builtins. */
363 #define TARGET_CPU_CPP_BUILTINS() \
366 /* Everyone but IRIX defines this to mips. */ \
368 builtin_assert ("machine=mips"); \
370 builtin_assert ("cpu=mips"); \
371 builtin_define ("__mips__"); \
372 builtin_define ("_mips"); \
374 /* We do this here because __mips is defined below and so we \
375 can't use builtin_define_std. We don't ever want to define \
376 "mips" for VxWorks because some of the VxWorks headers \
377 construct include filenames from a root directory macro, \
378 an architecture macro and a filename, where the architecture \
379 macro expands to 'mips'. If we define 'mips' to 1, the \
380 architecture macro expands to 1 as well. */ \
381 if (!flag_iso && !TARGET_VXWORKS) \
382 builtin_define ("mips"); \
385 builtin_define ("__mips64"); \
389 /* Treat _R3000 and _R4000 like register-size \
390 defines, which is how they've historically \
394 builtin_define_std ("R4000"); \
395 builtin_define ("_R4000"); \
399 builtin_define_std ("R3000"); \
400 builtin_define ("_R3000"); \
403 if (TARGET_FLOAT64) \
404 builtin_define ("__mips_fpr=64"); \
406 builtin_define ("__mips_fpr=32"); \
408 if (mips_base_mips16) \
409 builtin_define ("__mips16"); \
412 builtin_define ("__mips3d"); \
414 if (TARGET_SMARTMIPS) \
415 builtin_define ("__mips_smartmips"); \
419 builtin_define ("__mips_dsp"); \
422 builtin_define ("__mips_dspr2"); \
423 builtin_define ("__mips_dsp_rev=2"); \
426 builtin_define ("__mips_dsp_rev=1"); \
429 MIPS_CPP_SET_PROCESSOR ("_MIPS_ARCH", mips_arch_info); \
430 MIPS_CPP_SET_PROCESSOR ("_MIPS_TUNE", mips_tune_info); \
434 builtin_define ("__mips=1"); \
435 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS1"); \
437 else if (ISA_MIPS2) \
439 builtin_define ("__mips=2"); \
440 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS2"); \
442 else if (ISA_MIPS3) \
444 builtin_define ("__mips=3"); \
445 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS3"); \
447 else if (ISA_MIPS4) \
449 builtin_define ("__mips=4"); \
450 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS4"); \
452 else if (ISA_MIPS32) \
454 builtin_define ("__mips=32"); \
455 builtin_define ("__mips_isa_rev=1"); \
456 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
458 else if (ISA_MIPS32R2) \
460 builtin_define ("__mips=32"); \
461 builtin_define ("__mips_isa_rev=2"); \
462 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS32"); \
464 else if (ISA_MIPS64) \
466 builtin_define ("__mips=64"); \
467 builtin_define ("__mips_isa_rev=1"); \
468 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
470 else if (ISA_MIPS64R2) \
472 builtin_define ("__mips=64"); \
473 builtin_define ("__mips_isa_rev=2"); \
474 builtin_define ("_MIPS_ISA=_MIPS_ISA_MIPS64"); \
480 builtin_define ("_ABIO32=1"); \
481 builtin_define ("_MIPS_SIM=_ABIO32"); \
485 builtin_define ("_ABIN32=2"); \
486 builtin_define ("_MIPS_SIM=_ABIN32"); \
490 builtin_define ("_ABI64=3"); \
491 builtin_define ("_MIPS_SIM=_ABI64"); \
495 builtin_define ("_ABIO64=4"); \
496 builtin_define ("_MIPS_SIM=_ABIO64"); \
500 builtin_define_with_int_value ("_MIPS_SZINT", INT_TYPE_SIZE); \
501 builtin_define_with_int_value ("_MIPS_SZLONG", LONG_TYPE_SIZE); \
502 builtin_define_with_int_value ("_MIPS_SZPTR", POINTER_SIZE); \
503 builtin_define_with_int_value ("_MIPS_FPSET", \
504 32 / MAX_FPRS_PER_FMT); \
506 /* These defines reflect the ABI in use, not whether the \
507 FPU is directly accessible. */ \
508 if (TARGET_HARD_FLOAT_ABI) \
509 builtin_define ("__mips_hard_float"); \
511 builtin_define ("__mips_soft_float"); \
513 if (TARGET_SINGLE_FLOAT) \
514 builtin_define ("__mips_single_float"); \
516 if (TARGET_PAIRED_SINGLE_FLOAT) \
517 builtin_define ("__mips_paired_single_float"); \
519 if (TARGET_BIG_ENDIAN) \
521 builtin_define_std ("MIPSEB"); \
522 builtin_define ("_MIPSEB"); \
526 builtin_define_std ("MIPSEL"); \
527 builtin_define ("_MIPSEL"); \
530 /* Whether Loongson vector modes are enabled. */ \
531 if (TARGET_LOONGSON_VECTORS) \
532 builtin_define ("__mips_loongson_vector_rev"); \
534 /* Historical Octeon macro. */ \
536 builtin_define ("__OCTEON__"); \
538 /* Macros dependent on the C dialect. */ \
539 if (preprocessing_asm_p ()) \
541 builtin_define_std ("LANGUAGE_ASSEMBLY"); \
542 builtin_define ("_LANGUAGE_ASSEMBLY"); \
544 else if (c_dialect_cxx ()) \
546 builtin_define ("_LANGUAGE_C_PLUS_PLUS"); \
547 builtin_define ("__LANGUAGE_C_PLUS_PLUS"); \
548 builtin_define ("__LANGUAGE_C_PLUS_PLUS__"); \
552 builtin_define_std ("LANGUAGE_C"); \
553 builtin_define ("_LANGUAGE_C"); \
555 if (c_dialect_objc ()) \
557 builtin_define ("_LANGUAGE_OBJECTIVE_C"); \
558 builtin_define ("__LANGUAGE_OBJECTIVE_C"); \
559 /* Bizarre, but needed at least for Irix. */ \
560 builtin_define_std ("LANGUAGE_C"); \
561 builtin_define ("_LANGUAGE_C"); \
564 if (mips_abi == ABI_EABI) \
565 builtin_define ("__mips_eabi"); \
569 /* Default target_flags if no switches are specified */
571 #ifndef TARGET_DEFAULT
572 #define TARGET_DEFAULT 0
575 #ifndef TARGET_CPU_DEFAULT
576 #define TARGET_CPU_DEFAULT 0
579 #ifndef TARGET_ENDIAN_DEFAULT
580 #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN
583 #ifndef TARGET_FP_EXCEPTIONS_DEFAULT
584 #define TARGET_FP_EXCEPTIONS_DEFAULT MASK_FP_EXCEPTIONS
587 /* 'from-abi' makes a good default: you get whatever the ABI requires. */
588 #ifndef MIPS_ISA_DEFAULT
589 #ifndef MIPS_CPU_STRING_DEFAULT
590 #define MIPS_CPU_STRING_DEFAULT "from-abi"
596 /* Make this compile time constant for libgcc2 */
598 #define TARGET_64BIT 1
600 #define TARGET_64BIT 0
602 #endif /* IN_LIBGCC2 */
604 /* Force the call stack unwinders in unwind.inc not to be MIPS16 code
605 when compiled with hardware floating point. This is because MIPS16
606 code cannot save and restore the floating-point registers, which is
607 important if in a mixed MIPS16/non-MIPS16 environment. */
610 #if __mips_hard_float
611 #define LIBGCC2_UNWIND_ATTRIBUTE __attribute__((__nomips16__))
613 #endif /* IN_LIBGCC2 */
615 #define TARGET_LIBGCC_SDATA_SECTION ".sdata"
617 #ifndef MULTILIB_ENDIAN_DEFAULT
618 #if TARGET_ENDIAN_DEFAULT == 0
619 #define MULTILIB_ENDIAN_DEFAULT "EL"
621 #define MULTILIB_ENDIAN_DEFAULT "EB"
625 #ifndef MULTILIB_ISA_DEFAULT
626 # if MIPS_ISA_DEFAULT == 1
627 # define MULTILIB_ISA_DEFAULT "mips1"
629 # if MIPS_ISA_DEFAULT == 2
630 # define MULTILIB_ISA_DEFAULT "mips2"
632 # if MIPS_ISA_DEFAULT == 3
633 # define MULTILIB_ISA_DEFAULT "mips3"
635 # if MIPS_ISA_DEFAULT == 4
636 # define MULTILIB_ISA_DEFAULT "mips4"
638 # if MIPS_ISA_DEFAULT == 32
639 # define MULTILIB_ISA_DEFAULT "mips32"
641 # if MIPS_ISA_DEFAULT == 33
642 # define MULTILIB_ISA_DEFAULT "mips32r2"
644 # if MIPS_ISA_DEFAULT == 64
645 # define MULTILIB_ISA_DEFAULT "mips64"
647 # if MIPS_ISA_DEFAULT == 65
648 # define MULTILIB_ISA_DEFAULT "mips64r2"
650 # define MULTILIB_ISA_DEFAULT "mips1"
661 #ifndef MULTILIB_DEFAULTS
662 #define MULTILIB_DEFAULTS \
663 { MULTILIB_ENDIAN_DEFAULT, MULTILIB_ISA_DEFAULT, MULTILIB_ABI_DEFAULT }
666 /* We must pass -EL to the linker by default for little endian embedded
667 targets using linker scripts with a OUTPUT_FORMAT line. Otherwise, the
668 linker will default to using big-endian output files. The OUTPUT_FORMAT
669 line must be in the linker script, otherwise -EB/-EL will not work. */
672 #if TARGET_ENDIAN_DEFAULT == 0
673 #define ENDIAN_SPEC "%{!EB:%{!meb:-EL}} %{EB|meb:-EB}"
675 #define ENDIAN_SPEC "%{!EL:%{!mel:-EB}} %{EL|mel:-EL}"
679 /* A spec condition that matches all non-mips16 -mips arguments. */
681 #define MIPS_ISA_LEVEL_OPTION_SPEC \
682 "mips1|mips2|mips3|mips4|mips32*|mips64*"
684 /* A spec condition that matches all non-mips16 architecture arguments. */
686 #define MIPS_ARCH_OPTION_SPEC \
687 MIPS_ISA_LEVEL_OPTION_SPEC "|march=*"
689 /* A spec that infers a -mips argument from an -march argument,
690 or injects the default if no architecture is specified. */
692 #define MIPS_ISA_LEVEL_SPEC \
693 "%{" MIPS_ISA_LEVEL_OPTION_SPEC ":;: \
694 %{march=mips1|march=r2000|march=r3000|march=r3900:-mips1} \
695 %{march=mips2|march=r6000:-mips2} \
696 %{march=mips3|march=r4*|march=vr4*|march=orion|march=loongson2*:-mips3} \
697 %{march=mips4|march=r8000|march=vr5*|march=rm7000|march=rm9000:-mips4} \
698 %{march=mips32|march=4kc|march=4km|march=4kp|march=4ksc:-mips32} \
699 %{march=mips32r2|march=m4k|march=4ke*|march=4ksd|march=24k* \
700 |march=34k*|march=74k*: -mips32r2} \
701 %{march=mips64|march=5k*|march=20k*|march=sb1*|march=sr71000: -mips64} \
702 %{march=mips64r2|march=octeon: -mips64r2} \
703 %{!march=*: -" MULTILIB_ISA_DEFAULT "}}"
705 /* A spec that infers a -mhard-float or -msoft-float setting from an
706 -march argument. Note that soft-float and hard-float code are not
709 #define MIPS_ARCH_FLOAT_SPEC \
710 "%{mhard-float|msoft-float|march=mips*:; \
711 march=vr41*|march=m4k|march=4k*|march=24kc|march=24kec \
712 |march=34kc|march=74kc|march=5kc|march=octeon: -msoft-float; \
713 march=*: -mhard-float}"
715 /* A spec condition that matches 32-bit options. It only works if
716 MIPS_ISA_LEVEL_SPEC has been applied. */
718 #define MIPS_32BIT_OPTION_SPEC \
719 "mips1|mips2|mips32*|mgp32"
721 /* Support for a compile-time default CPU, et cetera. The rules are:
722 --with-arch is ignored if -march is specified or a -mips is specified
723 (other than -mips16).
724 --with-tune is ignored if -mtune is specified.
725 --with-abi is ignored if -mabi is specified.
726 --with-float is ignored if -mhard-float or -msoft-float are
728 --with-divide is ignored if -mdivide-traps or -mdivide-breaks are
730 #define OPTION_DEFAULT_SPECS \
731 {"arch", "%{" MIPS_ARCH_OPTION_SPEC ":;: -march=%(VALUE)}" }, \
732 {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
733 {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
734 {"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }, \
735 {"divide", "%{!mdivide-traps:%{!mdivide-breaks:-mdivide-%(VALUE)}}" }, \
736 {"llsc", "%{!mllsc:%{!mno-llsc:-m%(VALUE)}}" }, \
737 {"mips-plt", "%{!mplt:%{!mno-plt:-m%(VALUE)}}" }
740 #define GENERATE_DIVIDE_TRAPS (TARGET_DIVIDE_TRAPS \
741 && ISA_HAS_COND_TRAP)
743 #define GENERATE_BRANCHLIKELY (TARGET_BRANCHLIKELY && !TARGET_MIPS16)
745 /* True if the ABI can only work with 64-bit integer registers. We
746 generally allow ad-hoc variations for TARGET_SINGLE_FLOAT, but
747 otherwise floating-point registers must also be 64-bit. */
748 #define ABI_NEEDS_64BIT_REGS (TARGET_NEWABI || mips_abi == ABI_O64)
750 /* Likewise for 32-bit regs. */
751 #define ABI_NEEDS_32BIT_REGS (mips_abi == ABI_32)
753 /* True if symbols are 64 bits wide. At present, n64 is the only
754 ABI for which this is true. */
755 #define ABI_HAS_64BIT_SYMBOLS (mips_abi == ABI_64 && !TARGET_SYM32)
757 /* ISA has instructions for managing 64-bit fp and gp regs (e.g. mips3). */
758 #define ISA_HAS_64BIT_REGS (ISA_MIPS3 \
763 /* ISA has branch likely instructions (e.g. mips2). */
764 /* Disable branchlikely for tx39 until compare rewrite. They haven't
765 been generated up to this point. */
766 #define ISA_HAS_BRANCHLIKELY (!ISA_MIPS1)
768 /* ISA has a three-operand multiplication instruction (usually spelt "mul"). */
769 #define ISA_HAS_MUL3 ((TARGET_MIPS3900 \
781 /* ISA has a three-operand multiplication instruction. */
782 #define ISA_HAS_DMUL3 (TARGET_64BIT && TARGET_OCTEON)
784 /* ISA has the floating-point conditional move instructions introduced
786 #define ISA_HAS_FP_CONDMOVE ((ISA_MIPS4 \
791 && !TARGET_MIPS5500 \
794 /* ISA has the integer conditional move instructions introduced in mips4 and
795 ST Loongson 2E/2F. */
796 #define ISA_HAS_CONDMOVE (ISA_HAS_FP_CONDMOVE || TARGET_LOONGSON_2EF)
798 /* ISA has LDC1 and SDC1. */
799 #define ISA_HAS_LDC1_SDC1 (!ISA_MIPS1 && !TARGET_MIPS16)
801 /* ISA has the mips4 FP condition code instructions: FP-compare to CC,
802 branch on CC, and move (both FP and non-FP) on CC. */
803 #define ISA_HAS_8CC (ISA_MIPS4 \
809 /* This is a catch all for other mips4 instructions: indexed load, the
810 FP madd and msub instructions, and the FP recip and recip sqrt
812 #define ISA_HAS_FP4 ((ISA_MIPS4 \
813 || (ISA_MIPS32R2 && TARGET_FLOAT64) \
818 /* ISA has paired-single instructions. */
819 #define ISA_HAS_PAIRED_SINGLE (ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2)
821 /* ISA has conditional trap instructions. */
822 #define ISA_HAS_COND_TRAP (!ISA_MIPS1 \
825 /* ISA has integer multiply-accumulate instructions, madd and msub. */
826 #define ISA_HAS_MADD_MSUB ((ISA_MIPS32 \
832 /* Integer multiply-accumulate instructions should be generated. */
833 #define GENERATE_MADD_MSUB (ISA_HAS_MADD_MSUB && !TUNE_74K)
835 /* ISA has floating-point madd and msub instructions 'd = a * b [+-] c'. */
836 #define ISA_HAS_FP_MADD4_MSUB4 ISA_HAS_FP4
838 /* ISA has floating-point madd and msub instructions 'c = a * b [+-] c'. */
839 #define ISA_HAS_FP_MADD3_MSUB3 TARGET_LOONGSON_2EF
841 /* ISA has floating-point nmadd and nmsub instructions
842 'd = -((a * b) [+-] c)'. */
843 #define ISA_HAS_NMADD4_NMSUB4(MODE) \
845 || (ISA_MIPS32R2 && (MODE) == V2SFmode) \
848 && (!TARGET_MIPS5400 || TARGET_MAD) \
851 /* ISA has floating-point nmadd and nmsub instructions
852 'c = -((a * b) [+-] c)'. */
853 #define ISA_HAS_NMADD3_NMSUB3(MODE) \
856 /* ISA has count leading zeroes/ones instruction (not implemented). */
857 #define ISA_HAS_CLZ_CLO ((ISA_MIPS32 \
863 /* ISA has three operand multiply instructions that put
864 the high part in an accumulator: mulhi or mulhiu. */
865 #define ISA_HAS_MULHI ((TARGET_MIPS5400 \
870 /* ISA has three operand multiply instructions that
871 negates the result and puts the result in an accumulator. */
872 #define ISA_HAS_MULS ((TARGET_MIPS5400 \
877 /* ISA has three operand multiply instructions that subtracts the
878 result from a 4th operand and puts the result in an accumulator. */
879 #define ISA_HAS_MSAC ((TARGET_MIPS5400 \
884 /* ISA has three operand multiply instructions that the result
885 from a 4th operand and puts the result in an accumulator. */
886 #define ISA_HAS_MACC ((TARGET_MIPS4120 \
893 /* ISA has NEC VR-style MACC, MACCHI, DMACC and DMACCHI instructions. */
894 #define ISA_HAS_MACCHI ((TARGET_MIPS4120 \
895 || TARGET_MIPS4130) \
898 /* ISA has the "ror" (rotate right) instructions. */
899 #define ISA_HAS_ROR ((ISA_MIPS32R2 \
904 || TARGET_SMARTMIPS) \
907 /* ISA has data prefetch instructions. This controls use of 'pref'. */
908 #define ISA_HAS_PREFETCH ((ISA_MIPS4 \
915 /* ISA has data indexed prefetch instructions. This controls use of
916 'prefx', along with TARGET_HARD_FLOAT and TARGET_DOUBLE_FLOAT.
917 (prefx is a cop1x instruction, so can only be used if FP is
919 #define ISA_HAS_PREFETCHX ((ISA_MIPS4 \
925 /* True if trunc.w.s and trunc.w.d are real (not synthetic)
926 instructions. Both require TARGET_HARD_FLOAT, and trunc.w.d
927 also requires TARGET_DOUBLE_FLOAT. */
928 #define ISA_HAS_TRUNC_W (!ISA_MIPS1)
930 /* ISA includes the MIPS32r2 seb and seh instructions. */
931 #define ISA_HAS_SEB_SEH ((ISA_MIPS32R2 \
935 /* ISA includes the MIPS32/64 rev 2 ext and ins instructions. */
936 #define ISA_HAS_EXT_INS ((ISA_MIPS32R2 \
940 /* ISA has instructions for accessing top part of 64-bit fp regs. */
941 #define ISA_HAS_MXHC1 (TARGET_FLOAT64 \
945 /* ISA has lwxs instruction (load w/scaled index address. */
946 #define ISA_HAS_LWXS (TARGET_SMARTMIPS && !TARGET_MIPS16)
948 /* The DSP ASE is available. */
949 #define ISA_HAS_DSP (TARGET_DSP && !TARGET_MIPS16)
951 /* Revision 2 of the DSP ASE is available. */
952 #define ISA_HAS_DSPR2 (TARGET_DSPR2 && !TARGET_MIPS16)
954 /* True if the result of a load is not available to the next instruction.
955 A nop will then be needed between instructions like "lw $4,..."
956 and "addiu $4,$4,1". */
957 #define ISA_HAS_LOAD_DELAY (ISA_MIPS1 \
958 && !TARGET_MIPS3900 \
961 /* Likewise mtc1 and mfc1. */
962 #define ISA_HAS_XFER_DELAY (mips_isa <= 3 \
963 && !TARGET_LOONGSON_2EF)
965 /* Likewise floating-point comparisons. */
966 #define ISA_HAS_FCMP_DELAY (mips_isa <= 3 \
967 && !TARGET_LOONGSON_2EF)
969 /* True if mflo and mfhi can be immediately followed by instructions
970 which write to the HI and LO registers.
972 According to MIPS specifications, MIPS ISAs I, II, and III need
973 (at least) two instructions between the reads of HI/LO and
974 instructions which write them, and later ISAs do not. Contradicting
975 the MIPS specifications, some MIPS IV processor user manuals (e.g.
976 the UM for the NEC Vr5000) document needing the instructions between
977 HI/LO reads and writes, as well. Therefore, we declare only MIPS32,
978 MIPS64 and later ISAs to have the interlocks, plus any specific
979 earlier-ISA CPUs for which CPU documentation declares that the
980 instructions are really interlocked. */
981 #define ISA_HAS_HILO_INTERLOCKS (ISA_MIPS32 \
986 || TARGET_LOONGSON_2EF)
988 /* ISA includes synci, jr.hb and jalr.hb. */
989 #define ISA_HAS_SYNCI ((ISA_MIPS32R2 \
993 /* ISA includes sync. */
994 #define ISA_HAS_SYNC ((mips_isa >= 2 || TARGET_MIPS3900) && !TARGET_MIPS16)
995 #define GENERATE_SYNC \
996 (target_flags_explicit & MASK_LLSC \
997 ? TARGET_LLSC && !TARGET_MIPS16 \
1000 /* ISA includes ll and sc. Note that this implies ISA_HAS_SYNC
1001 because the expanders use both ISA_HAS_SYNC and ISA_HAS_LL_SC
1003 #define ISA_HAS_LL_SC (mips_isa >= 2 && !TARGET_MIPS16)
1004 #define GENERATE_LL_SC \
1005 (target_flags_explicit & MASK_LLSC \
1006 ? TARGET_LLSC && !TARGET_MIPS16 \
1009 /* ISA includes the bbit* instructions. */
1010 #define ISA_HAS_BBIT TARGET_OCTEON
1012 /* ISA includes the pop instruction. */
1013 #define ISA_HAS_POP TARGET_OCTEON
1015 /* Add -G xx support. */
1017 #undef SWITCH_TAKES_ARG
1018 #define SWITCH_TAKES_ARG(CHAR) \
1019 (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G')
1021 #define OVERRIDE_OPTIONS mips_override_options ()
1023 #define CONDITIONAL_REGISTER_USAGE mips_conditional_register_usage ()
1025 /* Show we can debug even without a frame pointer. */
1026 #define CAN_DEBUG_WITHOUT_FP
1028 /* Tell collect what flags to pass to nm. */
1030 #define NM_FLAGS "-Bn"
1034 #ifndef MIPS_ABI_DEFAULT
1035 #define MIPS_ABI_DEFAULT ABI_32
1038 /* Use the most portable ABI flag for the ASM specs. */
1040 #if MIPS_ABI_DEFAULT == ABI_32
1041 #define MULTILIB_ABI_DEFAULT "mabi=32"
1044 #if MIPS_ABI_DEFAULT == ABI_O64
1045 #define MULTILIB_ABI_DEFAULT "mabi=o64"
1048 #if MIPS_ABI_DEFAULT == ABI_N32
1049 #define MULTILIB_ABI_DEFAULT "mabi=n32"
1052 #if MIPS_ABI_DEFAULT == ABI_64
1053 #define MULTILIB_ABI_DEFAULT "mabi=64"
1056 #if MIPS_ABI_DEFAULT == ABI_EABI
1057 #define MULTILIB_ABI_DEFAULT "mabi=eabi"
1060 /* SUBTARGET_ASM_OPTIMIZING_SPEC handles passing optimization options
1061 to the assembler. It may be overridden by subtargets. */
1062 #ifndef SUBTARGET_ASM_OPTIMIZING_SPEC
1063 #define SUBTARGET_ASM_OPTIMIZING_SPEC "\
1065 %{!noasmopt:%{O:-O2} %{O1:-O2} %{O2:-O2} %{O3:-O3}}"
1068 /* SUBTARGET_ASM_DEBUGGING_SPEC handles passing debugging options to
1069 the assembler. It may be overridden by subtargets.
1071 Beginning with gas 2.13, -mdebug must be passed to correctly handle
1072 COFF debugging info. */
1074 #ifndef SUBTARGET_ASM_DEBUGGING_SPEC
1075 #define SUBTARGET_ASM_DEBUGGING_SPEC "\
1076 %{g} %{g0} %{g1} %{g2} %{g3} \
1077 %{ggdb:-g} %{ggdb0:-g0} %{ggdb1:-g1} %{ggdb2:-g2} %{ggdb3:-g3} \
1078 %{gstabs:-g} %{gstabs0:-g0} %{gstabs1:-g1} %{gstabs2:-g2} %{gstabs3:-g3} \
1079 %{gstabs+:-g} %{gstabs+0:-g0} %{gstabs+1:-g1} %{gstabs+2:-g2} %{gstabs+3:-g3} \
1080 %{gcoff:-g} %{gcoff0:-g0} %{gcoff1:-g1} %{gcoff2:-g2} %{gcoff3:-g3} \
1081 %{gcoff*:-mdebug} %{!gcoff*:-no-mdebug}"
1084 /* SUBTARGET_ASM_SPEC is always passed to the assembler. It may be
1085 overridden by subtargets. */
1087 #ifndef SUBTARGET_ASM_SPEC
1088 #define SUBTARGET_ASM_SPEC ""
1093 %{G*} %(endian_spec) %{mips1} %{mips2} %{mips3} %{mips4} \
1094 %{mips32*} %{mips64*} \
1095 %{mips16} %{mno-mips16:-no-mips16} \
1096 %{mips3d} %{mno-mips3d:-no-mips3d} \
1097 %{mdmx} %{mno-mdmx:-no-mdmx} \
1098 %{mdsp} %{mno-dsp} \
1099 %{mdspr2} %{mno-dspr2} \
1100 %{msmartmips} %{mno-smartmips} \
1102 %{mfix-vr4120} %{mfix-vr4130} \
1103 %(subtarget_asm_optimizing_spec) \
1104 %(subtarget_asm_debugging_spec) \
1105 %{mabi=*} %{!mabi=*: %(asm_abi_default_spec)} \
1106 %{mgp32} %{mgp64} %{march=*} %{mxgot:-xgot} \
1108 %{mshared} %{mno-shared} \
1109 %{msym32} %{mno-sym32} \
1111 %(subtarget_asm_spec)"
1113 /* Extra switches sometimes passed to the linker. */
1114 /* ??? The bestGnum will never be passed to the linker, because the gcc driver
1115 will interpret it as a -b option. */
1118 #define LINK_SPEC "\
1120 %{G*} %{mips1} %{mips2} %{mips3} %{mips4} %{mips32*} %{mips64*} \
1121 %{bestGnum} %{shared} %{non_shared}"
1122 #endif /* LINK_SPEC defined */
1125 /* Specs for the compiler proper */
1127 /* SUBTARGET_CC1_SPEC is passed to the compiler proper. It may be
1128 overridden by subtargets. */
1129 #ifndef SUBTARGET_CC1_SPEC
1130 #define SUBTARGET_CC1_SPEC ""
1133 /* CC1_SPEC is the set of arguments to pass to the compiler proper. */
1137 %{gline:%{!g:%{!g0:%{!g1:%{!g2: -g1}}}}} \
1138 %{G*} %{EB:-meb} %{EL:-mel} %{EB:%{EL:%emay not use both -EB and -EL}} \
1140 %(subtarget_cc1_spec)"
1142 /* Preprocessor specs. */
1144 /* SUBTARGET_CPP_SPEC is passed to the preprocessor. It may be
1145 overridden by subtargets. */
1146 #ifndef SUBTARGET_CPP_SPEC
1147 #define SUBTARGET_CPP_SPEC ""
1150 #define CPP_SPEC "%(subtarget_cpp_spec)"
1152 /* This macro defines names of additional specifications to put in the specs
1153 that can be used in various specifications like CC1_SPEC. Its definition
1154 is an initializer with a subgrouping for each command option.
1156 Each subgrouping contains a string constant, that defines the
1157 specification name, and a string constant that used by the GCC driver
1160 Do not define this macro if it does not need to do anything. */
1162 #define EXTRA_SPECS \
1163 { "subtarget_cc1_spec", SUBTARGET_CC1_SPEC }, \
1164 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
1165 { "subtarget_asm_optimizing_spec", SUBTARGET_ASM_OPTIMIZING_SPEC }, \
1166 { "subtarget_asm_debugging_spec", SUBTARGET_ASM_DEBUGGING_SPEC }, \
1167 { "subtarget_asm_spec", SUBTARGET_ASM_SPEC }, \
1168 { "asm_abi_default_spec", "-" MULTILIB_ABI_DEFAULT }, \
1169 { "endian_spec", ENDIAN_SPEC }, \
1170 SUBTARGET_EXTRA_SPECS
1172 #ifndef SUBTARGET_EXTRA_SPECS
1173 #define SUBTARGET_EXTRA_SPECS
1176 #define DBX_DEBUGGING_INFO 1 /* generate stabs (OSF/rose) */
1177 #define DWARF2_DEBUGGING_INFO 1 /* dwarf2 debugging info */
1179 #ifndef PREFERRED_DEBUGGING_TYPE
1180 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
1183 #define DWARF2_ADDR_SIZE (ABI_HAS_64BIT_SYMBOLS ? 8 : 4)
1185 /* By default, turn on GDB extensions. */
1186 #define DEFAULT_GDB_EXTENSIONS 1
1188 /* Local compiler-generated symbols must have a prefix that the assembler
1189 understands. By default, this is $, although some targets (e.g.,
1190 NetBSD-ELF) need to override this. */
1192 #ifndef LOCAL_LABEL_PREFIX
1193 #define LOCAL_LABEL_PREFIX "$"
1196 /* By default on the mips, external symbols do not have an underscore
1197 prepended, but some targets (e.g., NetBSD) require this. */
1199 #ifndef USER_LABEL_PREFIX
1200 #define USER_LABEL_PREFIX ""
1203 /* On Sun 4, this limit is 2048. We use 1500 to be safe,
1204 since the length can run past this up to a continuation point. */
1205 #undef DBX_CONTIN_LENGTH
1206 #define DBX_CONTIN_LENGTH 1500
1208 /* How to renumber registers for dbx and gdb. */
1209 #define DBX_REGISTER_NUMBER(REGNO) mips_dbx_regno[REGNO]
1211 /* The mapping from gcc register number to DWARF 2 CFA column number. */
1212 #define DWARF_FRAME_REGNUM(REGNO) mips_dwarf_regno[REGNO]
1214 /* The DWARF 2 CFA column which tracks the return address. */
1215 #define DWARF_FRAME_RETURN_COLUMN (GP_REG_FIRST + 31)
1217 /* Before the prologue, RA lives in r31. */
1218 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, GP_REG_FIRST + 31)
1220 /* Describe how we implement __builtin_eh_return. */
1221 #define EH_RETURN_DATA_REGNO(N) \
1222 ((N) < (TARGET_MIPS16 ? 2 : 4) ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
1224 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_REG_FIRST + 3)
1226 /* Offsets recorded in opcodes are a multiple of this alignment factor.
1227 The default for this in 64-bit mode is 8, which causes problems with
1228 SFmode register saves. */
1229 #define DWARF_CIE_DATA_ALIGNMENT -4
1231 /* Correct the offset of automatic variables and arguments. Note that
1232 the MIPS debug format wants all automatic variables and arguments
1233 to be in terms of the virtual frame pointer (stack pointer before
1234 any adjustment in the function), while the MIPS 3.0 linker wants
1235 the frame pointer to be the stack pointer after the initial
1238 #define DEBUGGER_AUTO_OFFSET(X) \
1239 mips_debugger_offset (X, (HOST_WIDE_INT) 0)
1240 #define DEBUGGER_ARG_OFFSET(OFFSET, X) \
1241 mips_debugger_offset (X, (HOST_WIDE_INT) OFFSET)
1243 /* Target machine storage layout */
1245 #define BITS_BIG_ENDIAN 0
1246 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1247 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
1249 /* Define this to set the endianness to use in libgcc2.c, which can
1250 not depend on target_flags. */
1251 #if !defined(MIPSEL) && !defined(__MIPSEL__)
1252 #define LIBGCC2_WORDS_BIG_ENDIAN 1
1254 #define LIBGCC2_WORDS_BIG_ENDIAN 0
1257 #define MAX_BITS_PER_WORD 64
1259 /* Width of a word, in units (bytes). */
1260 #define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
1262 #define MIN_UNITS_PER_WORD 4
1265 /* For MIPS, width of a floating point register. */
1266 #define UNITS_PER_FPREG (TARGET_FLOAT64 ? 8 : 4)
1268 /* The number of consecutive floating-point registers needed to store the
1269 largest format supported by the FPU. */
1270 #define MAX_FPRS_PER_FMT (TARGET_FLOAT64 || TARGET_SINGLE_FLOAT ? 1 : 2)
1272 /* The number of consecutive floating-point registers needed to store the
1273 smallest format supported by the FPU. */
1274 #define MIN_FPRS_PER_FMT \
1275 (ISA_MIPS32 || ISA_MIPS32R2 || ISA_MIPS64 || ISA_MIPS64R2 \
1276 ? 1 : MAX_FPRS_PER_FMT)
1278 /* The largest size of value that can be held in floating-point
1279 registers and moved with a single instruction. */
1280 #define UNITS_PER_HWFPVALUE \
1281 (TARGET_SOFT_FLOAT_ABI ? 0 : MAX_FPRS_PER_FMT * UNITS_PER_FPREG)
1283 /* The largest size of value that can be held in floating-point
1285 #define UNITS_PER_FPVALUE \
1286 (TARGET_SOFT_FLOAT_ABI ? 0 \
1287 : TARGET_SINGLE_FLOAT ? UNITS_PER_FPREG \
1288 : LONG_DOUBLE_TYPE_SIZE / BITS_PER_UNIT)
1290 /* The number of bytes in a double. */
1291 #define UNITS_PER_DOUBLE (TYPE_PRECISION (double_type_node) / BITS_PER_UNIT)
1293 #define UNITS_PER_SIMD_WORD(MODE) \
1294 (TARGET_PAIRED_SINGLE_FLOAT ? 8 : UNITS_PER_WORD)
1296 /* Set the sizes of the core types. */
1297 #define SHORT_TYPE_SIZE 16
1298 #define INT_TYPE_SIZE 32
1299 #define LONG_TYPE_SIZE (TARGET_LONG64 ? 64 : 32)
1300 #define LONG_LONG_TYPE_SIZE 64
1302 #define FLOAT_TYPE_SIZE 32
1303 #define DOUBLE_TYPE_SIZE 64
1304 #define LONG_DOUBLE_TYPE_SIZE (TARGET_NEWABI ? 128 : 64)
1306 /* Define the sizes of fixed-point types. */
1307 #define SHORT_FRACT_TYPE_SIZE 8
1308 #define FRACT_TYPE_SIZE 16
1309 #define LONG_FRACT_TYPE_SIZE 32
1310 #define LONG_LONG_FRACT_TYPE_SIZE 64
1312 #define SHORT_ACCUM_TYPE_SIZE 16
1313 #define ACCUM_TYPE_SIZE 32
1314 #define LONG_ACCUM_TYPE_SIZE 64
1315 /* FIXME. LONG_LONG_ACCUM_TYPE_SIZE should be 128 bits, but GCC
1316 doesn't support 128-bit integers for MIPS32 currently. */
1317 #define LONG_LONG_ACCUM_TYPE_SIZE (TARGET_64BIT ? 128 : 64)
1319 /* long double is not a fixed mode, but the idea is that, if we
1320 support long double, we also want a 128-bit integer type. */
1321 #define MAX_FIXED_MODE_SIZE LONG_DOUBLE_TYPE_SIZE
1324 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
1325 || (defined _ABI64 && _MIPS_SIM == _ABI64)
1326 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
1328 # define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
1332 /* Width in bits of a pointer. */
1333 #ifndef POINTER_SIZE
1334 #define POINTER_SIZE ((TARGET_LONG64 && TARGET_64BIT) ? 64 : 32)
1337 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
1338 #define PARM_BOUNDARY BITS_PER_WORD
1340 /* Allocation boundary (in *bits*) for the code of a function. */
1341 #define FUNCTION_BOUNDARY 32
1343 /* Alignment of field after `int : 0' in a structure. */
1344 #define EMPTY_FIELD_BOUNDARY 32
1346 /* Every structure's size must be a multiple of this. */
1347 /* 8 is observed right on a DECstation and on riscos 4.02. */
1348 #define STRUCTURE_SIZE_BOUNDARY 8
1350 /* There is no point aligning anything to a rounder boundary than this. */
1351 #define BIGGEST_ALIGNMENT LONG_DOUBLE_TYPE_SIZE
1353 /* All accesses must be aligned. */
1354 #define STRICT_ALIGNMENT 1
1356 /* Define this if you wish to imitate the way many other C compilers
1357 handle alignment of bitfields and the structures that contain
1360 The behavior is that the type written for a bit-field (`int',
1361 `short', or other integer type) imposes an alignment for the
1362 entire structure, as if the structure really did contain an
1363 ordinary field of that type. In addition, the bit-field is placed
1364 within the structure so that it would fit within such a field,
1365 not crossing a boundary for it.
1367 Thus, on most machines, a bit-field whose type is written as `int'
1368 would not cross a four-byte boundary, and would force four-byte
1369 alignment for the whole structure. (The alignment used may not
1370 be four bytes; it is controlled by the other alignment
1373 If the macro is defined, its definition should be a C expression;
1374 a nonzero value for the expression enables this behavior. */
1376 #define PCC_BITFIELD_TYPE_MATTERS 1
1378 /* If defined, a C expression to compute the alignment given to a
1379 constant that is being placed in memory. CONSTANT is the constant
1380 and ALIGN is the alignment that the object would ordinarily have.
1381 The value of this macro is used instead of that alignment to align
1384 If this macro is not defined, then ALIGN is used.
1386 The typical use of this macro is to increase alignment for string
1387 constants to be word aligned so that `strcpy' calls that copy
1388 constants can be done inline. */
1390 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
1391 ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
1392 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
1394 /* If defined, a C expression to compute the alignment for a static
1395 variable. TYPE is the data type, and ALIGN is the alignment that
1396 the object would ordinarily have. The value of this macro is used
1397 instead of that alignment to align the object.
1399 If this macro is not defined, then ALIGN is used.
1401 One use of this macro is to increase alignment of medium-size
1402 data to make it all fit in fewer cache lines. Another is to
1403 cause character arrays to be word-aligned so that `strcpy' calls
1404 that copy constants to character arrays can be done inline. */
1406 #undef DATA_ALIGNMENT
1407 #define DATA_ALIGNMENT(TYPE, ALIGN) \
1408 ((((ALIGN) < BITS_PER_WORD) \
1409 && (TREE_CODE (TYPE) == ARRAY_TYPE \
1410 || TREE_CODE (TYPE) == UNION_TYPE \
1411 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
1413 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause
1414 character arrays to be word-aligned so that `strcpy' calls that copy
1415 constants to character arrays can be done inline, and 'strcmp' can be
1416 optimised to use word loads. */
1417 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \
1418 DATA_ALIGNMENT (TYPE, ALIGN)
1420 #define PAD_VARARGS_DOWN \
1421 (FUNCTION_ARG_PADDING (TYPE_MODE (type), type) == downward)
1423 /* Define if operations between registers always perform the operation
1424 on the full register even if a narrower mode is specified. */
1425 #define WORD_REGISTER_OPERATIONS
1427 /* When in 64-bit mode, move insns will sign extend SImode and CCmode
1428 moves. All other references are zero extended. */
1429 #define LOAD_EXTEND_OP(MODE) \
1430 (TARGET_64BIT && ((MODE) == SImode || (MODE) == CCmode) \
1431 ? SIGN_EXTEND : ZERO_EXTEND)
1433 /* Define this macro if it is advisable to hold scalars in registers
1434 in a wider mode than that declared by the program. In such cases,
1435 the value is constrained to be within the bounds of the declared
1436 type, but kept valid in the wider mode. The signedness of the
1437 extension may differ from that of the type. */
1439 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
1440 if (GET_MODE_CLASS (MODE) == MODE_INT \
1441 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
1443 if ((MODE) == SImode) \
1448 /* Pmode is always the same as ptr_mode, but not always the same as word_mode.
1449 Extensions of pointers to word_mode must be signed. */
1450 #define POINTERS_EXTEND_UNSIGNED false
1452 /* Define if loading short immediate values into registers sign extends. */
1453 #define SHORT_IMMEDIATES_SIGN_EXTEND
1455 /* The [d]clz instructions have the natural values at 0. */
1457 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) \
1458 ((VALUE) = GET_MODE_BITSIZE (MODE), 2)
1460 /* Standard register usage. */
1462 /* Number of hardware registers. We have:
1464 - 32 integer registers
1465 - 32 floating point registers
1466 - 8 condition code registers
1467 - 2 accumulator registers (hi and lo)
1468 - 32 registers each for coprocessors 0, 2 and 3
1470 - ARG_POINTER_REGNUM
1471 - FRAME_POINTER_REGNUM
1472 - GOT_VERSION_REGNUM (see the comment above load_call<mode> for details)
1473 - 3 dummy entries that were used at various times in the past.
1474 - 6 DSP accumulator registers (3 hi-lo pairs) for MIPS DSP ASE
1475 - 6 DSP control registers */
1477 #define FIRST_PSEUDO_REGISTER 188
1479 /* By default, fix the kernel registers ($26 and $27), the global
1480 pointer ($28) and the stack pointer ($29). This can change
1481 depending on the command-line options.
1483 Regarding coprocessor registers: without evidence to the contrary,
1484 it's best to assume that each coprocessor register has a unique
1485 use. This can be overridden, in, e.g., mips_override_options or
1486 CONDITIONAL_REGISTER_USAGE should the assumption be inappropriate
1487 for a particular target. */
1489 #define FIXED_REGISTERS \
1491 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1492 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 0, \
1493 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1494 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1495 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, \
1496 /* COP0 registers */ \
1497 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1498 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1499 /* COP2 registers */ \
1500 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1501 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1502 /* COP3 registers */ \
1503 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1504 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1505 /* 6 DSP accumulator registers & 6 control registers */ \
1506 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1 \
1510 /* Set up this array for o32 by default.
1512 Note that we don't mark $31 as a call-clobbered register. The idea is
1513 that it's really the call instructions themselves which clobber $31.
1514 We don't care what the called function does with it afterwards.
1516 This approach makes it easier to implement sibcalls. Unlike normal
1517 calls, sibcalls don't clobber $31, so the register reaches the
1518 called function in tact. EPILOGUE_USES says that $31 is useful
1519 to the called function. */
1521 #define CALL_USED_REGISTERS \
1523 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1524 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, \
1525 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1526 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1527 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1528 /* COP0 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 /* COP2 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 /* COP3 registers */ \
1535 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1536 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1537 /* 6 DSP accumulator registers & 6 control registers */ \
1538 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 \
1542 /* Define this since $28, though fixed, is call-saved in many ABIs. */
1544 #define CALL_REALLY_USED_REGISTERS \
1545 { /* General registers. */ \
1546 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1547 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, \
1548 /* Floating-point registers. */ \
1549 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
1550 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1552 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, \
1553 /* COP0 registers */ \
1554 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1555 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1556 /* COP2 registers */ \
1557 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1558 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1559 /* COP3 registers */ \
1560 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1561 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
1562 /* 6 DSP accumulator registers & 6 control registers */ \
1563 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0 \
1566 /* Internal macros to classify a register number as to whether it's a
1567 general purpose register, a floating point register, a
1568 multiply/divide register, or a status register. */
1570 #define GP_REG_FIRST 0
1571 #define GP_REG_LAST 31
1572 #define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
1573 #define GP_DBX_FIRST 0
1575 #define FP_REG_FIRST 32
1576 #define FP_REG_LAST 63
1577 #define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
1578 #define FP_DBX_FIRST ((write_symbols == DBX_DEBUG) ? 38 : 32)
1580 #define MD_REG_FIRST 64
1581 #define MD_REG_LAST 65
1582 #define MD_REG_NUM (MD_REG_LAST - MD_REG_FIRST + 1)
1583 #define MD_DBX_FIRST (FP_DBX_FIRST + FP_REG_NUM)
1585 /* The DWARF 2 CFA column which tracks the return address from a
1586 signal handler context. This means that to maintain backwards
1587 compatibility, no hard register can be assigned this column if it
1588 would need to be handled by the DWARF unwinder. */
1589 #define DWARF_ALT_FRAME_RETURN_COLUMN 66
1591 #define ST_REG_FIRST 67
1592 #define ST_REG_LAST 74
1593 #define ST_REG_NUM (ST_REG_LAST - ST_REG_FIRST + 1)
1596 /* FIXME: renumber. */
1597 #define COP0_REG_FIRST 80
1598 #define COP0_REG_LAST 111
1599 #define COP0_REG_NUM (COP0_REG_LAST - COP0_REG_FIRST + 1)
1601 #define COP2_REG_FIRST 112
1602 #define COP2_REG_LAST 143
1603 #define COP2_REG_NUM (COP2_REG_LAST - COP2_REG_FIRST + 1)
1605 #define COP3_REG_FIRST 144
1606 #define COP3_REG_LAST 175
1607 #define COP3_REG_NUM (COP3_REG_LAST - COP3_REG_FIRST + 1)
1608 /* ALL_COP_REG_NUM assumes that COP0,2,and 3 are numbered consecutively. */
1609 #define ALL_COP_REG_NUM (COP3_REG_LAST - COP0_REG_FIRST + 1)
1611 #define DSP_ACC_REG_FIRST 176
1612 #define DSP_ACC_REG_LAST 181
1613 #define DSP_ACC_REG_NUM (DSP_ACC_REG_LAST - DSP_ACC_REG_FIRST + 1)
1615 #define AT_REGNUM (GP_REG_FIRST + 1)
1616 #define HI_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST : MD_REG_FIRST + 1)
1617 #define LO_REGNUM (TARGET_BIG_ENDIAN ? MD_REG_FIRST + 1 : MD_REG_FIRST)
1619 /* FPSW_REGNUM is the single condition code used if !ISA_HAS_8CC.
1620 If ISA_HAS_8CC, it should not be used, and an arbitrary ST_REG
1621 should be used instead. */
1622 #define FPSW_REGNUM ST_REG_FIRST
1624 #define GP_REG_P(REGNO) \
1625 ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
1626 #define M16_REG_P(REGNO) \
1627 (((REGNO) >= 2 && (REGNO) <= 7) || (REGNO) == 16 || (REGNO) == 17)
1628 #define FP_REG_P(REGNO) \
1629 ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
1630 #define MD_REG_P(REGNO) \
1631 ((unsigned int) ((int) (REGNO) - MD_REG_FIRST) < MD_REG_NUM)
1632 #define ST_REG_P(REGNO) \
1633 ((unsigned int) ((int) (REGNO) - ST_REG_FIRST) < ST_REG_NUM)
1634 #define COP0_REG_P(REGNO) \
1635 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < COP0_REG_NUM)
1636 #define COP2_REG_P(REGNO) \
1637 ((unsigned int) ((int) (REGNO) - COP2_REG_FIRST) < COP2_REG_NUM)
1638 #define COP3_REG_P(REGNO) \
1639 ((unsigned int) ((int) (REGNO) - COP3_REG_FIRST) < COP3_REG_NUM)
1640 #define ALL_COP_REG_P(REGNO) \
1641 ((unsigned int) ((int) (REGNO) - COP0_REG_FIRST) < ALL_COP_REG_NUM)
1642 /* Test if REGNO is one of the 6 new DSP accumulators. */
1643 #define DSP_ACC_REG_P(REGNO) \
1644 ((unsigned int) ((int) (REGNO) - DSP_ACC_REG_FIRST) < DSP_ACC_REG_NUM)
1645 /* Test if REGNO is hi, lo, or one of the 6 new DSP accumulators. */
1646 #define ACC_REG_P(REGNO) \
1647 (MD_REG_P (REGNO) || DSP_ACC_REG_P (REGNO))
1649 #define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
1651 /* True if X is (const (unspec [(const_int 0)] UNSPEC_GP)). This is used
1652 to initialize the mips16 gp pseudo register. */
1653 #define CONST_GP_P(X) \
1654 (GET_CODE (X) == CONST \
1655 && GET_CODE (XEXP (X, 0)) == UNSPEC \
1656 && XINT (XEXP (X, 0), 1) == UNSPEC_GP)
1658 /* Return coprocessor number from register number. */
1660 #define COPNUM_AS_CHAR_FROM_REGNUM(REGNO) \
1661 (COP0_REG_P (REGNO) ? '0' : COP2_REG_P (REGNO) ? '2' \
1662 : COP3_REG_P (REGNO) ? '3' : '?')
1665 #define HARD_REGNO_NREGS(REGNO, MODE) mips_hard_regno_nregs (REGNO, MODE)
1667 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1668 mips_hard_regno_mode_ok[ (int)(MODE) ][ (REGNO) ]
1670 #define MODES_TIEABLE_P mips_modes_tieable_p
1672 /* Register to use for pushing function arguments. */
1673 #define STACK_POINTER_REGNUM (GP_REG_FIRST + 29)
1675 /* These two registers don't really exist: they get eliminated to either
1676 the stack or hard frame pointer. */
1677 #define ARG_POINTER_REGNUM 77
1678 #define FRAME_POINTER_REGNUM 78
1680 /* $30 is not available on the mips16, so we use $17 as the frame
1682 #define HARD_FRAME_POINTER_REGNUM \
1683 (TARGET_MIPS16 ? GP_REG_FIRST + 17 : GP_REG_FIRST + 30)
1685 #define FRAME_POINTER_REQUIRED (mips_frame_pointer_required ())
1687 /* Register in which static-chain is passed to a function. */
1688 #define STATIC_CHAIN_REGNUM (GP_REG_FIRST + 15)
1690 /* Registers used as temporaries in prologue/epilogue code:
1692 - If a MIPS16 PIC function needs access to _gp, it first loads
1693 the value into MIPS16_PIC_TEMP and then copies it to $gp.
1695 - The prologue can use MIPS_PROLOGUE_TEMP as a general temporary
1696 register. The register must not conflict with MIPS16_PIC_TEMP.
1698 - The epilogue can use MIPS_EPILOGUE_TEMP as a general temporary
1701 If we're generating MIPS16 code, these registers must come from the
1702 core set of 8. The prologue registers mustn't conflict with any
1703 incoming arguments, the static chain pointer, or the frame pointer.
1704 The epilogue temporary mustn't conflict with the return registers,
1705 the PIC call register ($25), the frame pointer, the EH stack adjustment,
1706 or the EH data registers. */
1708 #define MIPS16_PIC_TEMP_REGNUM (GP_REG_FIRST + 2)
1709 #define MIPS_PROLOGUE_TEMP_REGNUM (GP_REG_FIRST + 3)
1710 #define MIPS_EPILOGUE_TEMP_REGNUM (GP_REG_FIRST + (TARGET_MIPS16 ? 6 : 8))
1712 #define MIPS16_PIC_TEMP gen_rtx_REG (Pmode, MIPS16_PIC_TEMP_REGNUM)
1713 #define MIPS_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_PROLOGUE_TEMP_REGNUM)
1714 #define MIPS_EPILOGUE_TEMP(MODE) gen_rtx_REG (MODE, MIPS_EPILOGUE_TEMP_REGNUM)
1716 /* Define this macro if it is as good or better to call a constant
1717 function address than to call an address kept in a register. */
1718 #define NO_FUNCTION_CSE 1
1720 /* The ABI-defined global pointer. Sometimes we use a different
1721 register in leaf functions: see PIC_OFFSET_TABLE_REGNUM. */
1722 #define GLOBAL_POINTER_REGNUM (GP_REG_FIRST + 28)
1724 /* We normally use $28 as the global pointer. However, when generating
1725 n32/64 PIC, it is better for leaf functions to use a call-clobbered
1726 register instead. They can then avoid saving and restoring $28
1727 and perhaps avoid using a frame at all.
1729 When a leaf function uses something other than $28, mips_expand_prologue
1730 will modify pic_offset_table_rtx in place. Take the register number
1731 from there after reload. */
1732 #define PIC_OFFSET_TABLE_REGNUM \
1733 (reload_completed ? REGNO (pic_offset_table_rtx) : GLOBAL_POINTER_REGNUM)
1735 #define PIC_FUNCTION_ADDR_REGNUM (GP_REG_FIRST + 25)
1737 /* Define the classes of registers for register constraints in the
1738 machine description. Also define ranges of constants.
1740 One of the classes must always be named ALL_REGS and include all hard regs.
1741 If there is more than one class, another class must be named NO_REGS
1742 and contain no registers.
1744 The name GENERAL_REGS must be the name of a class (or an alias for
1745 another name such as ALL_REGS). This is the class of registers
1746 that is allowed by "g" or "r" in a register constraint.
1747 Also, registers outside this class are allocated only when
1748 instructions express preferences for them.
1750 The classes must be numbered in nondecreasing order; that is,
1751 a larger-numbered class must never be contained completely
1752 in a smaller-numbered class.
1754 For any two classes, it is very desirable that there be another
1755 class that represents their union. */
1759 NO_REGS, /* no registers in set */
1760 M16_REGS, /* mips16 directly accessible registers */
1761 T_REG, /* mips16 T register ($24) */
1762 M16_T_REGS, /* mips16 registers plus T register */
1763 PIC_FN_ADDR_REG, /* SVR4 PIC function address register */
1764 V1_REG, /* Register $v1 ($3) used for TLS access. */
1765 LEA_REGS, /* Every GPR except $25 */
1766 GR_REGS, /* integer registers */
1767 FP_REGS, /* floating point registers */
1768 MD0_REG, /* first multiply/divide register */
1769 MD1_REG, /* second multiply/divide register */
1770 MD_REGS, /* multiply/divide registers (hi/lo) */
1771 COP0_REGS, /* generic coprocessor classes */
1774 HI_AND_GR_REGS, /* union classes */
1781 ALL_COP_AND_GR_REGS,
1782 ST_REGS, /* status registers (fp status) */
1783 DSP_ACC_REGS, /* DSP accumulator registers */
1784 ACC_REGS, /* Hi/Lo and DSP accumulator registers */
1785 ALL_REGS, /* all registers */
1786 LIM_REG_CLASSES /* max value + 1 */
1789 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1791 #define GENERAL_REGS GR_REGS
1793 /* An initializer containing the names of the register classes as C
1794 string constants. These names are used in writing some of the
1797 #define REG_CLASS_NAMES \
1803 "PIC_FN_ADDR_REG", \
1811 /* coprocessor registers */ \
1818 "COP0_AND_GR_REGS", \
1819 "COP2_AND_GR_REGS", \
1820 "COP3_AND_GR_REGS", \
1822 "ALL_COP_AND_GR_REGS", \
1829 /* An initializer containing the contents of the register classes,
1830 as integers which are bit masks. The Nth integer specifies the
1831 contents of class N. The way the integer MASK is interpreted is
1832 that register R is in the class if `MASK & (1 << R)' is 1.
1834 When the machine has more than 32 registers, an integer does not
1835 suffice. Then the integers are replaced by sub-initializers,
1836 braced groupings containing several integers. Each
1837 sub-initializer must be suitable as an initializer for the type
1838 `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
1840 #define REG_CLASS_CONTENTS \
1842 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* no registers */ \
1843 { 0x000300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 registers */ \
1844 { 0x01000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 T register */ \
1845 { 0x010300fc, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* mips16 and T regs */ \
1846 { 0x02000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* SVR4 PIC function address register */ \
1847 { 0x00000008, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* only $v1 */ \
1848 { 0xfdffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* Every other GPR except $25 */ \
1849 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* integer registers */ \
1850 { 0x00000000, 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* floating registers*/ \
1851 { 0x00000000, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* hi register */ \
1852 { 0x00000000, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, /* lo register */ \
1853 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x00000000 }, /* mul/div registers */ \
1854 { 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, /* cop0 registers */ \
1855 { 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, /* cop2 registers */ \
1856 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, /* cop3 registers */ \
1857 { 0xffffffff, 0x00000000, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, /* union classes */ \
1858 { 0xffffffff, 0x00000000, 0x00000002, 0x00000000, 0x00000000, 0x00000000 }, \
1859 { 0x00000000, 0xffffffff, 0x00000001, 0x00000000, 0x00000000, 0x00000000 }, \
1860 { 0xffffffff, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000, 0x00000000 }, \
1861 { 0xffffffff, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff, 0x00000000 }, \
1862 { 0xffffffff, 0x00000000, 0x00000000, 0x00000000, 0xffff0000, 0x0000ffff }, \
1863 { 0x00000000, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
1864 { 0xffffffff, 0x00000000, 0xffff0000, 0xffffffff, 0xffffffff, 0x0000ffff }, \
1865 { 0x00000000, 0x00000000, 0x000007f8, 0x00000000, 0x00000000, 0x00000000 }, /* status registers */ \
1866 { 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x003f0000 }, /* dsp accumulator registers */ \
1867 { 0x00000000, 0x00000000, 0x00000003, 0x00000000, 0x00000000, 0x003f0000 }, /* hi/lo and dsp accumulator registers */ \
1868 { 0xffffffff, 0xffffffff, 0xffff07ff, 0xffffffff, 0xffffffff, 0x0fffffff } /* all registers */ \
1872 /* A C expression whose value is a register class containing hard
1873 register REGNO. In general there is more that one such class;
1874 choose a class which is "minimal", meaning that no smaller class
1875 also contains the register. */
1877 #define REGNO_REG_CLASS(REGNO) mips_regno_to_class[ (REGNO) ]
1879 /* A macro whose definition is the name of the class to which a
1880 valid base register must belong. A base register is one used in
1881 an address which is the register value plus a displacement. */
1883 #define BASE_REG_CLASS (TARGET_MIPS16 ? M16_REGS : GR_REGS)
1885 /* A macro whose definition is the name of the class to which a
1886 valid index register must belong. An index register is one used
1887 in an address where its value is either multiplied by a scale
1888 factor or added to another register (as well as added to a
1891 #define INDEX_REG_CLASS NO_REGS
1893 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1894 registers explicitly used in the rtl to be used as spill registers
1895 but prevents the compiler from extending the lifetime of these
1898 #define SMALL_REGISTER_CLASSES (TARGET_MIPS16)
1900 /* REG_ALLOC_ORDER is to order in which to allocate registers. This
1901 is the default value (allocate the registers in numeric order). We
1902 define it just so that we can override it for the mips16 target in
1903 ORDER_REGS_FOR_LOCAL_ALLOC. */
1905 #define REG_ALLOC_ORDER \
1906 { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
1907 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, \
1908 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
1909 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \
1910 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
1911 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \
1912 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \
1913 112,113,114,115,116,117,118,119,120,121,122,123,124,125,126,127, \
1914 128,129,130,131,132,133,134,135,136,137,138,139,140,141,142,143, \
1915 144,145,146,147,148,149,150,151,152,153,154,155,156,157,158,159, \
1916 160,161,162,163,164,165,166,167,168,169,170,171,172,173,174,175, \
1917 176,177,178,179,180,181,182,183,184,185,186,187 \
1920 /* ORDER_REGS_FOR_LOCAL_ALLOC is a macro which permits reg_alloc_order
1921 to be rearranged based on a particular function. On the mips16, we
1922 want to allocate $24 (T_REG) before other registers for
1923 instructions for which it is possible. */
1925 #define ORDER_REGS_FOR_LOCAL_ALLOC mips_order_regs_for_local_alloc ()
1927 /* True if VALUE is an unsigned 6-bit number. */
1929 #define UIMM6_OPERAND(VALUE) \
1930 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0x3f) == 0)
1932 /* True if VALUE is a signed 10-bit number. */
1934 #define IMM10_OPERAND(VALUE) \
1935 ((unsigned HOST_WIDE_INT) (VALUE) + 0x200 < 0x400)
1937 /* True if VALUE is a signed 16-bit number. */
1939 #define SMALL_OPERAND(VALUE) \
1940 ((unsigned HOST_WIDE_INT) (VALUE) + 0x8000 < 0x10000)
1942 /* True if VALUE is an unsigned 16-bit number. */
1944 #define SMALL_OPERAND_UNSIGNED(VALUE) \
1945 (((VALUE) & ~(unsigned HOST_WIDE_INT) 0xffff) == 0)
1947 /* True if VALUE can be loaded into a register using LUI. */
1949 #define LUI_OPERAND(VALUE) \
1950 (((VALUE) | 0x7fff0000) == 0x7fff0000 \
1951 || ((VALUE) | 0x7fff0000) + 0x10000 == 0)
1953 /* Return a value X with the low 16 bits clear, and such that
1954 VALUE - X is a signed 16-bit value. */
1956 #define CONST_HIGH_PART(VALUE) \
1957 (((VALUE) + 0x8000) & ~(unsigned HOST_WIDE_INT) 0xffff)
1959 #define CONST_LOW_PART(VALUE) \
1960 ((VALUE) - CONST_HIGH_PART (VALUE))
1962 #define SMALL_INT(X) SMALL_OPERAND (INTVAL (X))
1963 #define SMALL_INT_UNSIGNED(X) SMALL_OPERAND_UNSIGNED (INTVAL (X))
1964 #define LUI_INT(X) LUI_OPERAND (INTVAL (X))
1966 #define PREFERRED_RELOAD_CLASS(X,CLASS) \
1967 mips_preferred_reload_class (X, CLASS)
1969 /* The HI and LO registers can only be reloaded via the general
1970 registers. Condition code registers can only be loaded to the
1971 general registers, and from the floating point registers. */
1973 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1974 mips_secondary_reload_class (CLASS, MODE, X, true)
1975 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1976 mips_secondary_reload_class (CLASS, MODE, X, false)
1978 /* Return the maximum number of consecutive registers
1979 needed to represent mode MODE in a register of class CLASS. */
1981 #define CLASS_MAX_NREGS(CLASS, MODE) mips_class_max_nregs (CLASS, MODE)
1983 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1984 mips_cannot_change_mode_class (FROM, TO, CLASS)
1986 /* Stack layout; function entry, exit and calling. */
1988 #define STACK_GROWS_DOWNWARD
1990 /* The offset of the first local variable from the beginning of the frame.
1991 See mips_compute_frame_info for details about the frame layout. */
1993 #define STARTING_FRAME_OFFSET \
1994 (crtl->outgoing_args_size \
1995 + (TARGET_CALL_CLOBBERED_GP ? MIPS_STACK_ALIGN (UNITS_PER_WORD) : 0))
1997 #define RETURN_ADDR_RTX mips_return_addr
1999 /* Mask off the MIPS16 ISA bit in unwind addresses.
2001 The reason for this is a little subtle. When unwinding a call,
2002 we are given the call's return address, which on most targets
2003 is the address of the following instruction. However, what we
2004 actually want to find is the EH region for the call itself.
2005 The target-independent unwind code therefore searches for "RA - 1".
2007 In the MIPS16 case, RA is always an odd-valued (ISA-encoded) address.
2008 RA - 1 is therefore the real (even-valued) start of the return
2009 instruction. EH region labels are usually odd-valued MIPS16 symbols
2010 too, so a search for an even address within a MIPS16 region would
2013 However, there is an exception. If the end of an EH region is also
2014 the end of a function, the end label is allowed to be even. This is
2015 necessary because a following non-MIPS16 function may also need EH
2016 information for its first instruction.
2018 Thus a MIPS16 region may be terminated by an ISA-encoded or a
2019 non-ISA-encoded address. This probably isn't ideal, but it is
2020 the traditional (legacy) behavior. It is therefore only safe
2021 to search MIPS EH regions for an _odd-valued_ address.
2023 Masking off the ISA bit means that the target-independent code
2024 will search for "(RA & -2) - 1", which is guaranteed to be odd. */
2025 #define MASK_RETURN_ADDR GEN_INT (-2)
2028 /* Similarly, don't use the least-significant bit to tell pointers to
2029 code from vtable index. */
2031 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
2033 /* The eliminations to $17 are only used for mips16 code. See the
2034 definition of HARD_FRAME_POINTER_REGNUM. */
2036 #define ELIMINABLE_REGS \
2037 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2038 { ARG_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2039 { ARG_POINTER_REGNUM, GP_REG_FIRST + 17}, \
2040 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
2041 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 30}, \
2042 { FRAME_POINTER_REGNUM, GP_REG_FIRST + 17}}
2044 /* Make sure that we're not trying to eliminate to the wrong hard frame
2046 #define CAN_ELIMINATE(FROM, TO) \
2047 ((TO) == HARD_FRAME_POINTER_REGNUM || (TO) == STACK_POINTER_REGNUM)
2049 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2050 (OFFSET) = mips_initial_elimination_offset ((FROM), (TO))
2052 /* Allocate stack space for arguments at the beginning of each function. */
2053 #define ACCUMULATE_OUTGOING_ARGS 1
2055 /* The argument pointer always points to the first argument. */
2056 #define FIRST_PARM_OFFSET(FNDECL) 0
2058 /* o32 and o64 reserve stack space for all argument registers. */
2059 #define REG_PARM_STACK_SPACE(FNDECL) \
2061 ? (MAX_ARGS_IN_REGISTERS * UNITS_PER_WORD) \
2064 /* Define this if it is the responsibility of the caller to
2065 allocate the area reserved for arguments passed in registers.
2066 If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
2067 of this macro is to determine whether the space is included in
2068 `crtl->outgoing_args_size'. */
2069 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
2071 #define STACK_BOUNDARY (TARGET_NEWABI ? 128 : 64)
2073 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) 0
2075 /* Symbolic macros for the registers used to return integer and floating
2078 #define GP_RETURN (GP_REG_FIRST + 2)
2079 #define FP_RETURN ((TARGET_SOFT_FLOAT) ? GP_RETURN : (FP_REG_FIRST + 0))
2081 #define MAX_ARGS_IN_REGISTERS (TARGET_OLDABI ? 4 : 8)
2083 /* Symbolic macros for the first/last argument registers. */
2085 #define GP_ARG_FIRST (GP_REG_FIRST + 4)
2086 #define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2087 #define FP_ARG_FIRST (FP_REG_FIRST + 12)
2088 #define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
2090 #define LIBCALL_VALUE(MODE) \
2091 mips_function_value (NULL_TREE, MODE)
2093 #define FUNCTION_VALUE(VALTYPE, FUNC) \
2094 mips_function_value (VALTYPE, VOIDmode)
2096 /* 1 if N is a possible register number for a function value.
2097 On the MIPS, R2 R3 and F0 F2 are the only register thus used.
2098 Currently, R2 and F0 are only implemented here (C has no complex type) */
2100 #define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN \
2101 || (LONG_DOUBLE_TYPE_SIZE == 128 && FP_RETURN != GP_RETURN \
2102 && (N) == FP_RETURN + 2))
2104 /* 1 if N is a possible register number for function argument passing.
2105 We have no FP argument registers when soft-float. When FP registers
2106 are 32 bits, we can't directly reference the odd numbered ones. */
2108 #define FUNCTION_ARG_REGNO_P(N) \
2109 ((IN_RANGE((N), GP_ARG_FIRST, GP_ARG_LAST) \
2110 || (IN_RANGE((N), FP_ARG_FIRST, FP_ARG_LAST))) \
2113 /* This structure has to cope with two different argument allocation
2114 schemes. Most MIPS ABIs view the arguments as a structure, of which
2115 the first N words go in registers and the rest go on the stack. If I
2116 < N, the Ith word might go in Ith integer argument register or in a
2117 floating-point register. For these ABIs, we only need to remember
2118 the offset of the current argument into the structure.
2120 The EABI instead allocates the integer and floating-point arguments
2121 separately. The first N words of FP arguments go in FP registers,
2122 the rest go on the stack. Likewise, the first N words of the other
2123 arguments go in integer registers, and the rest go on the stack. We
2124 need to maintain three counts: the number of integer registers used,
2125 the number of floating-point registers used, and the number of words
2126 passed on the stack.
2128 We could keep separate information for the two ABIs (a word count for
2129 the standard ABIs, and three separate counts for the EABI). But it
2130 seems simpler to view the standard ABIs as forms of EABI that do not
2131 allocate floating-point registers.
2133 So for the standard ABIs, the first N words are allocated to integer
2134 registers, and mips_function_arg decides on an argument-by-argument
2135 basis whether that argument should really go in an integer register,
2136 or in a floating-point one. */
2138 typedef struct mips_args {
2139 /* Always true for varargs functions. Otherwise true if at least
2140 one argument has been passed in an integer register. */
2143 /* The number of arguments seen so far. */
2144 unsigned int arg_number;
2146 /* The number of integer registers used so far. For all ABIs except
2147 EABI, this is the number of words that have been added to the
2148 argument structure, limited to MAX_ARGS_IN_REGISTERS. */
2149 unsigned int num_gprs;
2151 /* For EABI, the number of floating-point registers used so far. */
2152 unsigned int num_fprs;
2154 /* The number of words passed on the stack. */
2155 unsigned int stack_words;
2157 /* On the mips16, we need to keep track of which floating point
2158 arguments were passed in general registers, but would have been
2159 passed in the FP regs if this were a 32-bit function, so that we
2160 can move them to the FP regs if we wind up calling a 32-bit
2161 function. We record this information in fp_code, encoded in base
2162 four. A zero digit means no floating point argument, a one digit
2163 means an SFmode argument, and a two digit means a DFmode argument,
2164 and a three digit is not used. The low order digit is the first
2165 argument. Thus 6 == 1 * 4 + 2 means a DFmode argument followed by
2166 an SFmode argument. ??? A more sophisticated approach will be
2167 needed if MIPS_ABI != ABI_32. */
2170 /* True if the function has a prototype. */
2174 /* Initialize a variable CUM of type CUMULATIVE_ARGS
2175 for a call to a function whose data type is FNTYPE.
2176 For a library call, FNTYPE is 0. */
2178 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
2179 mips_init_cumulative_args (&CUM, FNTYPE)
2181 /* Update the data in CUM to advance over an argument
2182 of mode MODE and data type TYPE.
2183 (TYPE is null for libcalls where that information may not be available.) */
2185 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
2186 mips_function_arg_advance (&CUM, MODE, TYPE, NAMED)
2188 /* Determine where to put an argument to a function.
2189 Value is zero to push the argument on the stack,
2190 or a hard register in which to store the argument.
2192 MODE is the argument's machine mode.
2193 TYPE is the data type of the argument (as a tree).
2194 This is null for libcalls where that information may
2196 CUM is a variable of type CUMULATIVE_ARGS which gives info about
2197 the preceding args and about the function being called.
2198 NAMED is nonzero if this argument is a named parameter
2199 (otherwise it is an extra parameter matching an ellipsis). */
2201 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
2202 mips_function_arg (&CUM, MODE, TYPE, NAMED)
2204 #define FUNCTION_ARG_BOUNDARY mips_function_arg_boundary
2206 #define FUNCTION_ARG_PADDING(MODE, TYPE) \
2207 (mips_pad_arg_upward (MODE, TYPE) ? upward : downward)
2209 #define BLOCK_REG_PADDING(MODE, TYPE, FIRST) \
2210 (mips_pad_reg_upward (MODE, TYPE) ? upward : downward)
2212 /* True if using EABI and varargs can be passed in floating-point
2213 registers. Under these conditions, we need a more complex form
2214 of va_list, which tracks GPR, FPR and stack arguments separately. */
2215 #define EABI_FLOAT_VARARGS_P \
2216 (mips_abi == ABI_EABI && UNITS_PER_FPVALUE >= UNITS_PER_DOUBLE)
2219 /* Say that the epilogue uses the return address register. Note that
2220 in the case of sibcalls, the values "used by the epilogue" are
2221 considered live at the start of the called function.
2223 If using a GOT, say that the epilogue also uses GOT_VERSION_REGNUM.
2224 See the comment above load_call<mode> for details. */
2225 #define EPILOGUE_USES(REGNO) \
2226 ((REGNO) == 31 || (TARGET_USE_GOT && (REGNO) == GOT_VERSION_REGNUM))
2228 /* Treat LOC as a byte offset from the stack pointer and round it up
2229 to the next fully-aligned offset. */
2230 #define MIPS_STACK_ALIGN(LOC) \
2231 (TARGET_NEWABI ? ((LOC) + 15) & -16 : ((LOC) + 7) & -8)
2234 /* Output assembler code to FILE to increment profiler label # LABELNO
2235 for profiling a function entry. */
2237 #define FUNCTION_PROFILER(FILE, LABELNO) \
2239 if (TARGET_MIPS16) \
2240 sorry ("mips16 function profiling"); \
2241 fprintf (FILE, "\t.set\tnoat\n"); \
2242 fprintf (FILE, "\tmove\t%s,%s\t\t# save current return address\n", \
2243 reg_names[GP_REG_FIRST + 1], reg_names[GP_REG_FIRST + 31]); \
2244 /* _mcount treats $2 as the static chain register. */ \
2245 if (cfun->static_chain_decl != NULL) \
2246 fprintf (FILE, "\tmove\t%s,%s\n", reg_names[2], \
2247 reg_names[STATIC_CHAIN_REGNUM]); \
2248 if (!TARGET_NEWABI) \
2251 "\t%s\t%s,%s,%d\t\t# _mcount pops 2 words from stack\n", \
2252 TARGET_64BIT ? "dsubu" : "subu", \
2253 reg_names[STACK_POINTER_REGNUM], \
2254 reg_names[STACK_POINTER_REGNUM], \
2255 Pmode == DImode ? 16 : 8); \
2257 fprintf (FILE, "\tjal\t_mcount\n"); \
2258 fprintf (FILE, "\t.set\tat\n"); \
2259 /* _mcount treats $2 as the static chain register. */ \
2260 if (cfun->static_chain_decl != NULL) \
2261 fprintf (FILE, "\tmove\t%s,%s\n", reg_names[STATIC_CHAIN_REGNUM], \
2265 /* The profiler preserves all interesting registers, including $31. */
2266 #define MIPS_SAVE_REG_FOR_PROFILING_P(REGNO) false
2268 /* No mips port has ever used the profiler counter word, so don't emit it
2269 or the label for it. */
2271 #define NO_PROFILE_COUNTERS 1
2273 /* Define this macro if the code for function profiling should come
2274 before the function prologue. Normally, the profiling code comes
2277 /* #define PROFILE_BEFORE_PROLOGUE */
2279 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
2280 the stack pointer does not matter. The value is tested only in
2281 functions that have frame pointers.
2282 No definition is equivalent to always zero. */
2284 #define EXIT_IGNORE_STACK 1
2287 /* A C statement to output, on the stream FILE, assembler code for a
2288 block of data that contains the constant parts of a trampoline.
2289 This code should not include a label--the label is taken care of
2292 #define TRAMPOLINE_TEMPLATE(STREAM) \
2294 if (ptr_mode == DImode) \
2295 fprintf (STREAM, "\t.word\t0x03e0082d\t\t# dmove $1,$31\n"); \
2297 fprintf (STREAM, "\t.word\t0x03e00821\t\t# move $1,$31\n"); \
2298 fprintf (STREAM, "\t.word\t0x04110001\t\t# bgezal $0,.+8\n"); \
2299 fprintf (STREAM, "\t.word\t0x00000000\t\t# nop\n"); \
2300 if (ptr_mode == DImode) \
2302 fprintf (STREAM, "\t.word\t0xdff90014\t\t# ld $25,20($31)\n"); \
2303 fprintf (STREAM, "\t.word\t0xdfef001c\t\t# ld $15,28($31)\n"); \
2307 fprintf (STREAM, "\t.word\t0x8ff90010\t\t# lw $25,16($31)\n"); \
2308 fprintf (STREAM, "\t.word\t0x8fef0014\t\t# lw $15,20($31)\n"); \
2310 fprintf (STREAM, "\t.word\t0x03200008\t\t# jr $25\n"); \
2311 if (ptr_mode == DImode) \
2313 fprintf (STREAM, "\t.word\t0x0020f82d\t\t# dmove $31,$1\n"); \
2314 fprintf (STREAM, "\t.word\t0x00000000\t\t# <padding>\n"); \
2315 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <function address>\n"); \
2316 fprintf (STREAM, "\t.dword\t0x00000000\t\t# <static chain value>\n"); \
2320 fprintf (STREAM, "\t.word\t0x0020f821\t\t# move $31,$1\n"); \
2321 fprintf (STREAM, "\t.word\t0x00000000\t\t# <function address>\n"); \
2322 fprintf (STREAM, "\t.word\t0x00000000\t\t# <static chain value>\n"); \
2326 /* A C expression for the size in bytes of the trampoline, as an
2329 #define TRAMPOLINE_SIZE (ptr_mode == DImode ? 48 : 36)
2331 /* Alignment required for trampolines, in bits. */
2333 #define TRAMPOLINE_ALIGNMENT GET_MODE_BITSIZE (ptr_mode)
2335 /* INITIALIZE_TRAMPOLINE calls this library function to flush
2336 program and data caches. */
2338 #ifndef CACHE_FLUSH_FUNC
2339 #define CACHE_FLUSH_FUNC "_flush_cache"
2342 #define MIPS_ICACHE_SYNC(ADDR, SIZE) \
2343 /* Flush both caches. We need to flush the data cache in case \
2344 the system has a write-back cache. */ \
2345 emit_library_call (gen_rtx_SYMBOL_REF (Pmode, mips_cache_flush_func), \
2346 0, VOIDmode, 3, ADDR, Pmode, SIZE, Pmode, \
2347 GEN_INT (3), TYPE_MODE (integer_type_node))
2349 /* A C statement to initialize the variable parts of a trampoline.
2350 ADDR is an RTX for the address of the trampoline; FNADDR is an
2351 RTX for the address of the nested function; STATIC_CHAIN is an
2352 RTX for the static chain value that should be passed to the
2353 function when it is called. */
2355 #define INITIALIZE_TRAMPOLINE(ADDR, FUNC, CHAIN) \
2357 rtx func_addr, chain_addr, end_addr; \
2359 func_addr = plus_constant (ADDR, ptr_mode == DImode ? 32 : 28); \
2360 chain_addr = plus_constant (func_addr, GET_MODE_SIZE (ptr_mode)); \
2361 mips_emit_move (gen_rtx_MEM (ptr_mode, func_addr), FUNC); \
2362 mips_emit_move (gen_rtx_MEM (ptr_mode, chain_addr), CHAIN); \
2363 end_addr = gen_reg_rtx (Pmode); \
2364 emit_insn (gen_add3_insn (end_addr, copy_rtx (ADDR), \
2365 GEN_INT (TRAMPOLINE_SIZE))); \
2366 emit_insn (gen_clear_cache (copy_rtx (ADDR), end_addr)); \
2369 /* Addressing modes, and classification of registers for them. */
2371 #define REGNO_OK_FOR_INDEX_P(REGNO) 0
2372 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2373 mips_regno_mode_ok_for_base_p (REGNO, MODE, 1)
2375 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
2376 and check its validity for a certain class.
2377 We have two alternate definitions for each of them.
2378 The usual definition accepts all pseudo regs; the other rejects them all.
2379 The symbol REG_OK_STRICT causes the latter definition to be used.
2381 Most source files want to accept pseudo regs in the hope that
2382 they will get allocated to the class that the insn wants them to be in.
2383 Some source files that are used after register allocation
2384 need to be strict. */
2386 #ifndef REG_OK_STRICT
2387 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2388 mips_regno_mode_ok_for_base_p (REGNO (X), MODE, 0)
2390 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2391 mips_regno_mode_ok_for_base_p (REGNO (X), MODE, 1)
2394 #define REG_OK_FOR_INDEX_P(X) 0
2397 /* Maximum number of registers that can appear in a valid memory address. */
2399 #define MAX_REGS_PER_ADDRESS 1
2401 #ifdef REG_OK_STRICT
2402 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2404 if (mips_legitimate_address_p (MODE, X, 1)) \
2408 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
2410 if (mips_legitimate_address_p (MODE, X, 0)) \
2415 /* Check for constness inline but use mips_legitimate_address_p
2416 to check whether a constant really is an address. */
2418 #define CONSTANT_ADDRESS_P(X) \
2419 (CONSTANT_P (X) && mips_legitimate_address_p (SImode, X, 0))
2421 #define LEGITIMATE_CONSTANT_P(X) (mips_const_insns (X) > 0)
2423 #define LEGITIMIZE_ADDRESS(X,OLDX,MODE,WIN) \
2425 if (mips_legitimize_address (&(X), MODE)) \
2430 /* A C statement or compound statement with a conditional `goto
2431 LABEL;' executed if memory address X (an RTX) can have different
2432 meanings depending on the machine mode of the memory reference it
2435 Autoincrement and autodecrement addresses typically have
2436 mode-dependent effects because the amount of the increment or
2437 decrement is the size of the operand being addressed. Some
2438 machines have other mode-dependent addresses. Many RISC machines
2439 have no mode-dependent addresses.
2441 You may assume that ADDR is a valid address for the machine. */
2443 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR,LABEL) {}
2445 /* This handles the magic '..CURRENT_FUNCTION' symbol, which means
2446 'the start of the function that this code is output in'. */
2448 #define ASM_OUTPUT_LABELREF(FILE,NAME) \
2449 if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
2450 asm_fprintf ((FILE), "%U%s", \
2451 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
2453 asm_fprintf ((FILE), "%U%s", (NAME))
2455 /* Flag to mark a function decl symbol that requires a long call. */
2456 #define SYMBOL_FLAG_LONG_CALL (SYMBOL_FLAG_MACH_DEP << 0)
2457 #define SYMBOL_REF_LONG_CALL_P(X) \
2458 ((SYMBOL_REF_FLAGS (X) & SYMBOL_FLAG_LONG_CALL) != 0)
2460 /* This flag marks functions that cannot be lazily bound. */
2461 #define SYMBOL_FLAG_BIND_NOW (SYMBOL_FLAG_MACH_DEP << 1)
2462 #define SYMBOL_REF_BIND_NOW_P(RTX) \
2463 ((SYMBOL_REF_FLAGS (RTX) & SYMBOL_FLAG_BIND_NOW) != 0)
2465 /* True if we're generating a form of MIPS16 code in which jump tables
2466 are stored in the text section and encoded as 16-bit PC-relative
2467 offsets. This is only possible when general text loads are allowed,
2468 since the table access itself will be an "lh" instruction. */
2469 /* ??? 16-bit offsets can overflow in large functions. */
2470 #define TARGET_MIPS16_SHORT_JUMP_TABLES TARGET_MIPS16_TEXT_LOADS
2472 #define JUMP_TABLES_IN_TEXT_SECTION TARGET_MIPS16_SHORT_JUMP_TABLES
2474 #define CASE_VECTOR_MODE (TARGET_MIPS16_SHORT_JUMP_TABLES ? HImode : ptr_mode)
2476 #define CASE_VECTOR_PC_RELATIVE TARGET_MIPS16_SHORT_JUMP_TABLES
2478 /* Define this as 1 if `char' should by default be signed; else as 0. */
2479 #ifndef DEFAULT_SIGNED_CHAR
2480 #define DEFAULT_SIGNED_CHAR 1
2483 /* Although LDC1 and SDC1 provide 64-bit moves on 32-bit targets,
2484 we generally don't want to use them for copying arbitrary data.
2485 A single N-word move is usually the same cost as N single-word moves. */
2486 #define MOVE_MAX UNITS_PER_WORD
2487 #define MAX_MOVE_MAX 8
2489 /* Define this macro as a C expression which is nonzero if
2490 accessing less than a word of memory (i.e. a `char' or a
2491 `short') is no faster than accessing a word of memory, i.e., if
2492 such access require more than one instruction or if there is no
2493 difference in cost between byte and (aligned) word loads.
2495 On RISC machines, it tends to generate better code to define
2496 this as 1, since it avoids making a QI or HI mode register.
2498 But, generating word accesses for -mips16 is generally bad as shifts
2499 (often extended) would be needed for byte accesses. */
2500 #define SLOW_BYTE_ACCESS (!TARGET_MIPS16)
2502 /* Define this to be nonzero if shift instructions ignore all but the low-order
2504 #define SHIFT_COUNT_TRUNCATED 1
2506 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
2507 is done just by pretending it is already truncated. */
2508 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) \
2509 (TARGET_64BIT ? ((INPREC) <= 32 || (OUTPREC) > 32) : 1)
2512 /* Specify the machine mode that pointers have.
2513 After generation of rtl, the compiler makes no further distinction
2514 between pointers and any other objects of this machine mode. */
2517 #define Pmode (TARGET_64BIT && TARGET_LONG64 ? DImode : SImode)
2520 /* Give call MEMs SImode since it is the "most permissive" mode
2521 for both 32-bit and 64-bit targets. */
2523 #define FUNCTION_MODE SImode
2526 /* A C expression for the cost of moving data from a register in
2527 class FROM to one in class TO. The classes are expressed using
2528 the enumeration values such as `GENERAL_REGS'. A value of 2 is
2529 the default; other values are interpreted relative to that.
2531 It is not required that the cost always equal 2 when FROM is the
2532 same as TO; on some machines it is expensive to move between
2533 registers if they are not general registers.
2535 If reload sees an insn consisting of a single `set' between two
2536 hard registers, and if `REGISTER_MOVE_COST' applied to their
2537 classes returns a value of 2, reload does not check to ensure
2538 that the constraints of the insn are met. Setting a cost of
2539 other than 2 will allow reload to verify that the constraints are
2540 met. You should do this if the `movM' pattern's constraints do
2541 not allow such copying. */
2543 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
2544 mips_register_move_cost (MODE, FROM, TO)
2546 #define MEMORY_MOVE_COST(MODE,CLASS,TO_P) \
2547 (mips_cost->memory_latency \
2548 + memory_move_secondary_cost ((MODE), (CLASS), (TO_P)))
2550 /* Define if copies to/from condition code registers should be avoided.
2552 This is needed for the MIPS because reload_outcc is not complete;
2553 it needs to handle cases where the source is a general or another
2554 condition code register. */
2555 #define AVOID_CCMODE_COPIES
2557 /* A C expression for the cost of a branch instruction. A value of
2558 1 is the default; other values are interpreted relative to that. */
2560 #define BRANCH_COST(speed_p, predictable_p) mips_branch_cost
2561 #define LOGICAL_OP_NON_SHORT_CIRCUIT 0
2563 /* If defined, modifies the length assigned to instruction INSN as a
2564 function of the context in which it is used. LENGTH is an lvalue
2565 that contains the initially computed length of the insn and should
2566 be updated with the correct length of the insn. */
2567 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
2568 ((LENGTH) = mips_adjust_insn_length ((INSN), (LENGTH)))
2570 /* Return the asm template for a non-MIPS16 conditional branch instruction.
2571 OPCODE is the opcode's mnemonic and OPERANDS is the asm template for
2573 #define MIPS_BRANCH(OPCODE, OPERANDS) \
2574 "%*" OPCODE "%?\t" OPERANDS "%/"
2576 /* Return the asm template for a call. INSN is the instruction's mnemonic
2577 ("j" or "jal"), OPERANDS are its operands, and OPNO is the operand number
2580 When generating GOT code without explicit relocation operators,
2581 all calls should use assembly macros. Otherwise, all indirect
2582 calls should use "jr" or "jalr"; we will arrange to restore $gp
2583 afterwards if necessary. Finally, we can only generate direct
2584 calls for -mabicalls by temporarily switching to non-PIC mode. */
2585 #define MIPS_CALL(INSN, OPERANDS, OPNO) \
2586 (TARGET_USE_GOT && !TARGET_EXPLICIT_RELOCS \
2587 ? "%*" INSN "\t%" #OPNO "%/" \
2588 : REG_P (OPERANDS[OPNO]) \
2589 ? "%*" INSN "r\t%" #OPNO "%/" \
2590 : TARGET_ABICALLS_PIC2 \
2591 ? (".option\tpic0\n\t" \
2592 "%*" INSN "\t%" #OPNO "%/\n\t" \
2594 : "%*" INSN "\t%" #OPNO "%/")
2596 /* Control the assembler format that we output. */
2598 /* Output to assembler file text saying following lines
2599 may contain character constants, extra white space, comments, etc. */
2602 #define ASM_APP_ON " #APP\n"
2605 /* Output to assembler file text saying following lines
2606 no longer contain unusual constructs. */
2609 #define ASM_APP_OFF " #NO_APP\n"
2612 #define REGISTER_NAMES \
2613 { "$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \
2614 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \
2615 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \
2616 "$24", "$25", "$26", "$27", "$28", "$sp", "$fp", "$31", \
2617 "$f0", "$f1", "$f2", "$f3", "$f4", "$f5", "$f6", "$f7", \
2618 "$f8", "$f9", "$f10", "$f11", "$f12", "$f13", "$f14", "$f15", \
2619 "$f16", "$f17", "$f18", "$f19", "$f20", "$f21", "$f22", "$f23", \
2620 "$f24", "$f25", "$f26", "$f27", "$f28", "$f29", "$f30", "$f31", \
2621 "hi", "lo", "", "$fcc0","$fcc1","$fcc2","$fcc3","$fcc4", \
2622 "$fcc5","$fcc6","$fcc7","", "", "$arg", "$frame", "$fakec", \
2623 "$c0r0", "$c0r1", "$c0r2", "$c0r3", "$c0r4", "$c0r5", "$c0r6", "$c0r7", \
2624 "$c0r8", "$c0r9", "$c0r10","$c0r11","$c0r12","$c0r13","$c0r14","$c0r15", \
2625 "$c0r16","$c0r17","$c0r18","$c0r19","$c0r20","$c0r21","$c0r22","$c0r23", \
2626 "$c0r24","$c0r25","$c0r26","$c0r27","$c0r28","$c0r29","$c0r30","$c0r31", \
2627 "$c2r0", "$c2r1", "$c2r2", "$c2r3", "$c2r4", "$c2r5", "$c2r6", "$c2r7", \
2628 "$c2r8", "$c2r9", "$c2r10","$c2r11","$c2r12","$c2r13","$c2r14","$c2r15", \
2629 "$c2r16","$c2r17","$c2r18","$c2r19","$c2r20","$c2r21","$c2r22","$c2r23", \
2630 "$c2r24","$c2r25","$c2r26","$c2r27","$c2r28","$c2r29","$c2r30","$c2r31", \
2631 "$c3r0", "$c3r1", "$c3r2", "$c3r3", "$c3r4", "$c3r5", "$c3r6", "$c3r7", \
2632 "$c3r8", "$c3r9", "$c3r10","$c3r11","$c3r12","$c3r13","$c3r14","$c3r15", \
2633 "$c3r16","$c3r17","$c3r18","$c3r19","$c3r20","$c3r21","$c3r22","$c3r23", \
2634 "$c3r24","$c3r25","$c3r26","$c3r27","$c3r28","$c3r29","$c3r30","$c3r31", \
2635 "$ac1hi","$ac1lo","$ac2hi","$ac2lo","$ac3hi","$ac3lo","$dsp_po","$dsp_sc", \
2636 "$dsp_ca","$dsp_ou","$dsp_cc","$dsp_ef" }
2638 /* List the "software" names for each register. Also list the numerical
2639 names for $fp and $sp. */
2641 #define ADDITIONAL_REGISTER_NAMES \
2643 { "$29", 29 + GP_REG_FIRST }, \
2644 { "$30", 30 + GP_REG_FIRST }, \
2645 { "at", 1 + GP_REG_FIRST }, \
2646 { "v0", 2 + GP_REG_FIRST }, \
2647 { "v1", 3 + GP_REG_FIRST }, \
2648 { "a0", 4 + GP_REG_FIRST }, \
2649 { "a1", 5 + GP_REG_FIRST }, \
2650 { "a2", 6 + GP_REG_FIRST }, \
2651 { "a3", 7 + GP_REG_FIRST }, \
2652 { "t0", 8 + GP_REG_FIRST }, \
2653 { "t1", 9 + GP_REG_FIRST }, \
2654 { "t2", 10 + GP_REG_FIRST }, \
2655 { "t3", 11 + GP_REG_FIRST }, \
2656 { "t4", 12 + GP_REG_FIRST }, \
2657 { "t5", 13 + GP_REG_FIRST }, \
2658 { "t6", 14 + GP_REG_FIRST }, \
2659 { "t7", 15 + GP_REG_FIRST }, \
2660 { "s0", 16 + GP_REG_FIRST }, \
2661 { "s1", 17 + GP_REG_FIRST }, \
2662 { "s2", 18 + GP_REG_FIRST }, \
2663 { "s3", 19 + GP_REG_FIRST }, \
2664 { "s4", 20 + GP_REG_FIRST }, \
2665 { "s5", 21 + GP_REG_FIRST }, \
2666 { "s6", 22 + GP_REG_FIRST }, \
2667 { "s7", 23 + GP_REG_FIRST }, \
2668 { "t8", 24 + GP_REG_FIRST }, \
2669 { "t9", 25 + GP_REG_FIRST }, \
2670 { "k0", 26 + GP_REG_FIRST }, \
2671 { "k1", 27 + GP_REG_FIRST }, \
2672 { "gp", 28 + GP_REG_FIRST }, \
2673 { "sp", 29 + GP_REG_FIRST }, \
2674 { "fp", 30 + GP_REG_FIRST }, \
2675 { "ra", 31 + GP_REG_FIRST }, \
2676 ALL_COP_ADDITIONAL_REGISTER_NAMES \
2679 /* This is meant to be redefined in the host dependent files. It is a
2680 set of alternative names and regnums for mips coprocessors. */
2682 #define ALL_COP_ADDITIONAL_REGISTER_NAMES
2684 #define PRINT_OPERAND mips_print_operand
2685 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) mips_print_operand_punct[CODE]
2686 #define PRINT_OPERAND_ADDRESS mips_print_operand_address
2688 /* A C statement, to be executed after all slot-filler instructions
2689 have been output. If necessary, call `dbr_sequence_length' to
2690 determine the number of slots filled in a sequence (zero if not
2691 currently outputting a sequence), to decide how many no-ops to
2692 output, or whatever.
2694 Don't define this macro if it has nothing to do, but it is
2695 helpful in reading assembly output if the extent of the delay
2696 sequence is made explicit (e.g. with white space).
2698 Note that output routines for instructions with delay slots must
2699 be prepared to deal with not being output as part of a sequence
2700 (i.e. when the scheduling pass is not run, or when no slot
2701 fillers could be found.) The variable `final_sequence' is null
2702 when not processing a sequence, otherwise it contains the
2703 `sequence' rtx being output. */
2705 #define DBR_OUTPUT_SEQEND(STREAM) \
2708 if (set_nomacro > 0 && --set_nomacro == 0) \
2709 fputs ("\t.set\tmacro\n", STREAM); \
2711 if (set_noreorder > 0 && --set_noreorder == 0) \
2712 fputs ("\t.set\treorder\n", STREAM); \
2714 fputs ("\n", STREAM); \
2718 /* How to tell the debugger about changes of source files. */
2719 #define ASM_OUTPUT_SOURCE_FILENAME mips_output_filename
2721 /* mips-tfile does not understand .stabd directives. */
2722 #define DBX_OUTPUT_SOURCE_LINE(STREAM, LINE, COUNTER) do { \
2723 dbxout_begin_stabn_sline (LINE); \
2724 dbxout_stab_value_internal_label ("LM", &COUNTER); \
2727 /* Use .loc directives for SDB line numbers. */
2728 #define SDB_OUTPUT_SOURCE_LINE(STREAM, LINE) \
2729 fprintf (STREAM, "\t.loc\t%d %d\n", num_source_filenames, LINE)
2731 /* The MIPS implementation uses some labels for its own purpose. The
2732 following lists what labels are created, and are all formed by the
2733 pattern $L[a-z].*. The machine independent portion of GCC creates
2734 labels matching: $L[A-Z][0-9]+ and $L[0-9]+.
2736 LM[0-9]+ Silicon Graphics/ECOFF stabs label before each stmt.
2737 $Lb[0-9]+ Begin blocks for MIPS debug support
2738 $Lc[0-9]+ Label for use in s<xx> operation.
2739 $Le[0-9]+ End blocks for MIPS debug support */
2741 #undef ASM_DECLARE_OBJECT_NAME
2742 #define ASM_DECLARE_OBJECT_NAME(STREAM, NAME, DECL) \
2743 mips_declare_object (STREAM, NAME, "", ":\n")
2745 /* Globalizing directive for a label. */
2746 #define GLOBAL_ASM_OP "\t.globl\t"
2748 /* This says how to define a global common symbol. */
2750 #define ASM_OUTPUT_ALIGNED_DECL_COMMON mips_output_aligned_decl_common
2752 /* This says how to define a local common symbol (i.e., not visible to
2755 #ifndef ASM_OUTPUT_ALIGNED_LOCAL
2756 #define ASM_OUTPUT_ALIGNED_LOCAL(STREAM, NAME, SIZE, ALIGN) \
2757 mips_declare_common_object (STREAM, NAME, "\n\t.lcomm\t", SIZE, ALIGN, false)
2760 /* This says how to output an external. It would be possible not to
2761 output anything and let undefined symbol become external. However
2762 the assembler uses length information on externals to allocate in
2763 data/sdata bss/sbss, thereby saving exec time. */
2765 #undef ASM_OUTPUT_EXTERNAL
2766 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \
2767 mips_output_external(STREAM,DECL,NAME)
2769 /* This is how to declare a function name. The actual work of
2770 emitting the label is moved to function_prologue, so that we can
2771 get the line number correctly emitted before the .ent directive,
2772 and after any .file directives. Define as empty so that the function
2773 is not declared before the .ent directive elsewhere. */
2775 #undef ASM_DECLARE_FUNCTION_NAME
2776 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL)
2778 /* This is how to store into the string LABEL
2779 the symbol_ref name of an internal numbered label where
2780 PREFIX is the class of label and NUM is the number within the class.
2781 This is suitable for output with `assemble_name'. */
2783 #undef ASM_GENERATE_INTERNAL_LABEL
2784 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
2785 sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
2787 /* This is how to output an element of a case-vector that is absolute. */
2789 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
2790 fprintf (STREAM, "\t%s\t%sL%d\n", \
2791 ptr_mode == DImode ? ".dword" : ".word", \
2792 LOCAL_LABEL_PREFIX, \
2795 /* This is how to output an element of a case-vector. We can make the
2796 entries PC-relative in MIPS16 code and GP-relative when .gp(d)word
2799 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
2801 if (TARGET_MIPS16_SHORT_JUMP_TABLES) \
2802 fprintf (STREAM, "\t.half\t%sL%d-%sL%d\n", \
2803 LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL); \
2804 else if (TARGET_GPWORD) \
2805 fprintf (STREAM, "\t%s\t%sL%d\n", \
2806 ptr_mode == DImode ? ".gpdword" : ".gpword", \
2807 LOCAL_LABEL_PREFIX, VALUE); \
2808 else if (TARGET_RTP_PIC) \
2810 /* Make the entry relative to the start of the function. */ \
2811 rtx fnsym = XEXP (DECL_RTL (current_function_decl), 0); \
2812 fprintf (STREAM, "\t%s\t%sL%d-", \
2813 Pmode == DImode ? ".dword" : ".word", \
2814 LOCAL_LABEL_PREFIX, VALUE); \
2815 assemble_name (STREAM, XSTR (fnsym, 0)); \
2816 fprintf (STREAM, "\n"); \
2819 fprintf (STREAM, "\t%s\t%sL%d\n", \
2820 ptr_mode == DImode ? ".dword" : ".word", \
2821 LOCAL_LABEL_PREFIX, VALUE); \
2824 /* This is how to output an assembler line
2825 that says to advance the location counter
2826 to a multiple of 2**LOG bytes. */
2828 #define ASM_OUTPUT_ALIGN(STREAM,LOG) \
2829 fprintf (STREAM, "\t.align\t%d\n", (LOG))
2831 /* This is how to output an assembler line to advance the location
2832 counter by SIZE bytes. */
2834 #undef ASM_OUTPUT_SKIP
2835 #define ASM_OUTPUT_SKIP(STREAM,SIZE) \
2836 fprintf (STREAM, "\t.space\t"HOST_WIDE_INT_PRINT_UNSIGNED"\n", (SIZE))
2838 /* This is how to output a string. */
2839 #undef ASM_OUTPUT_ASCII
2840 #define ASM_OUTPUT_ASCII mips_output_ascii
2842 /* Output #ident as a in the read-only data section. */
2843 #undef ASM_OUTPUT_IDENT
2844 #define ASM_OUTPUT_IDENT(FILE, STRING) \
2846 const char *p = STRING; \
2847 int size = strlen (p) + 1; \
2848 switch_to_section (readonly_data_section); \
2849 assemble_string (p, size); \
2852 /* Default to -G 8 */
2853 #ifndef MIPS_DEFAULT_GVALUE
2854 #define MIPS_DEFAULT_GVALUE 8
2857 /* Define the strings to put out for each section in the object file. */
2858 #define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
2859 #define DATA_SECTION_ASM_OP "\t.data" /* large data */
2861 #undef READONLY_DATA_SECTION_ASM_OP
2862 #define READONLY_DATA_SECTION_ASM_OP "\t.rdata" /* read-only data */
2864 #define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
2867 fprintf (STREAM, "\t%s\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \
2868 TARGET_64BIT ? "daddiu" : "addiu", \
2869 reg_names[STACK_POINTER_REGNUM], \
2870 reg_names[STACK_POINTER_REGNUM], \
2871 TARGET_64BIT ? "sd" : "sw", \
2873 reg_names[STACK_POINTER_REGNUM]); \
2877 #define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
2880 if (! set_noreorder) \
2881 fprintf (STREAM, "\t.set\tnoreorder\n"); \
2883 fprintf (STREAM, "\t%s\t%s,0(%s)\n\t%s\t%s,%s,8\n", \
2884 TARGET_64BIT ? "ld" : "lw", \
2886 reg_names[STACK_POINTER_REGNUM], \
2887 TARGET_64BIT ? "daddu" : "addu", \
2888 reg_names[STACK_POINTER_REGNUM], \
2889 reg_names[STACK_POINTER_REGNUM]); \
2891 if (! set_noreorder) \
2892 fprintf (STREAM, "\t.set\treorder\n"); \
2896 /* How to start an assembler comment.
2897 The leading space is important (the mips native assembler requires it). */
2898 #ifndef ASM_COMMENT_START
2899 #define ASM_COMMENT_START " #"
2902 /* Default definitions for size_t and ptrdiff_t. We must override the
2903 definitions from ../svr4.h on mips-*-linux-gnu. */
2906 #define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
2909 #define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
2911 /* The maximum number of bytes that can be copied by one iteration of
2912 a movmemsi loop; see mips_block_move_loop. */
2913 #define MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER \
2914 (UNITS_PER_WORD * 4)
2916 /* The maximum number of bytes that can be copied by a straight-line
2917 implementation of movmemsi; see mips_block_move_straight. We want
2918 to make sure that any loop-based implementation will iterate at
2920 #define MIPS_MAX_MOVE_BYTES_STRAIGHT \
2921 (MIPS_MAX_MOVE_BYTES_PER_LOOP_ITER * 2)
2923 /* The base cost of a memcpy call, for MOVE_RATIO and friends. These
2924 values were determined experimentally by benchmarking with CSiBE.
2925 In theory, the call overhead is higher for TARGET_ABICALLS (especially
2926 for o32 where we have to restore $gp afterwards as well as make an
2927 indirect call), but in practice, bumping this up higher for
2928 TARGET_ABICALLS doesn't make much difference to code size. */
2930 #define MIPS_CALL_RATIO 8
2932 /* Any loop-based implementation of movmemsi will have at least
2933 MIPS_MAX_MOVE_BYTES_STRAIGHT / UNITS_PER_WORD memory-to-memory
2934 moves, so allow individual copies of fewer elements.
2936 When movmemsi is not available, use a value approximating
2937 the length of a memcpy call sequence, so that move_by_pieces
2938 will generate inline code if it is shorter than a function call.
2939 Since move_by_pieces_ninsns counts memory-to-memory moves, but
2940 we'll have to generate a load/store pair for each, halve the
2941 value of MIPS_CALL_RATIO to take that into account. */
2943 #define MOVE_RATIO(speed) \
2945 ? MIPS_MAX_MOVE_BYTES_STRAIGHT / MOVE_MAX \
2946 : MIPS_CALL_RATIO / 2)
2948 /* movmemsi is meant to generate code that is at least as good as
2949 move_by_pieces. However, movmemsi effectively uses a by-pieces
2950 implementation both for moves smaller than a word and for word-aligned
2951 moves of no more than MIPS_MAX_MOVE_BYTES_STRAIGHT bytes. We should
2952 allow the tree-level optimisers to do such moves by pieces, as it
2953 often exposes other optimization opportunities. We might as well
2954 continue to use movmemsi at the rtl level though, as it produces
2955 better code when scheduling is disabled (such as at -O). */
2957 #define MOVE_BY_PIECES_P(SIZE, ALIGN) \
2959 ? (!currently_expanding_to_rtl \
2960 && ((ALIGN) < BITS_PER_WORD \
2961 ? (SIZE) < UNITS_PER_WORD \
2962 : (SIZE) <= MIPS_MAX_MOVE_BYTES_STRAIGHT)) \
2963 : (move_by_pieces_ninsns (SIZE, ALIGN, MOVE_MAX_PIECES + 1) \
2964 < (unsigned int) MOVE_RATIO (false)))
2966 /* For CLEAR_RATIO, when optimizing for size, give a better estimate
2967 of the length of a memset call, but use the default otherwise. */
2969 #define CLEAR_RATIO(speed)\
2970 ((speed) ? 15 : MIPS_CALL_RATIO)
2972 /* This is similar to CLEAR_RATIO, but for a non-zero constant, so when
2973 optimizing for size adjust the ratio to account for the overhead of
2974 loading the constant and replicating it across the word. */
2976 #define SET_RATIO(speed) \
2977 ((speed) ? 15 : MIPS_CALL_RATIO - 2)
2979 /* STORE_BY_PIECES_P can be used when copying a constant string, but
2980 in that case each word takes 3 insns (lui, ori, sw), or more in
2981 64-bit mode, instead of 2 (lw, sw). For now we always fail this
2982 and let the move_by_pieces code copy the string from read-only
2983 memory. In the future, this could be tuned further for multi-issue
2984 CPUs that can issue stores down one pipe and arithmetic instructions
2985 down another; in that case, the lui/ori/sw combination would be a
2986 win for long enough strings. */
2988 #define STORE_BY_PIECES_P(SIZE, ALIGN) 0
2991 /* Since the bits of the _init and _fini function is spread across
2992 many object files, each potentially with its own GP, we must assume
2993 we need to load our GP. We don't preserve $gp or $ra, since each
2994 init/fini chunk is supposed to initialize $gp, and crti/crtn
2995 already take care of preserving $ra and, when appropriate, $gp. */
2996 #if (defined _ABIO32 && _MIPS_SIM == _ABIO32)
2997 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
2998 asm (SECTION_OP "\n\
3004 jal " USER_LABEL_PREFIX #FUNC "\n\
3005 " TEXT_SECTION_ASM_OP);
3006 #endif /* Switch to #elif when we're no longer limited by K&R C. */
3007 #if (defined _ABIN32 && _MIPS_SIM == _ABIN32) \
3008 || (defined _ABI64 && _MIPS_SIM == _ABI64)
3009 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
3010 asm (SECTION_OP "\n\
3015 .cpsetup $31, $2, 1b\n\
3016 jal " USER_LABEL_PREFIX #FUNC "\n\
3017 " TEXT_SECTION_ASM_OP);
3022 #define HAVE_AS_TLS 0
3025 /* Return an asm string that atomically:
3027 - Compares memory reference %1 to register %2 and, if they are
3028 equal, changes %1 to %3.
3030 - Sets register %0 to the old value of memory reference %1.
3032 SUFFIX is the suffix that should be added to "ll" and "sc" instructions
3033 and OP is the instruction that should be used to load %3 into a
3035 #define MIPS_COMPARE_AND_SWAP(SUFFIX, OP) \
3037 "1:\tll" SUFFIX "\t%0,%1\n" \
3038 "\tbne\t%0,%z2,2f\n" \
3039 "\t" OP "\t%@,%3\n" \
3040 "\tsc" SUFFIX "\t%@,%1\n" \
3041 "\tbeq\t%@,%.,1b\n" \
3043 "\tsync%-%]%>%)\n" \
3046 /* Return an asm string that atomically:
3048 - Given that %2 contains a bit mask and %3 the inverted mask and
3049 that %4 and %5 have already been ANDed with %2.
3051 - Compares the bits in memory reference %1 selected by mask %2 to
3052 register %4 and, if they are equal, changes the selected bits
3055 - Sets register %0 to the old value of memory reference %1.
3057 OPS are the instructions needed to OR %5 with %@. */
3058 #define MIPS_COMPARE_AND_SWAP_12(OPS) \
3061 "\tand\t%@,%0,%2\n" \
3062 "\tbne\t%@,%z4,2f\n" \
3063 "\tand\t%@,%0,%3\n" \
3066 "\tbeq\t%@,%.,1b\n" \
3068 "\tsync%-%]%>%)\n" \
3071 #define MIPS_COMPARE_AND_SWAP_12_ZERO_OP ""
3072 #define MIPS_COMPARE_AND_SWAP_12_NONZERO_OP "\tor\t%@,%@,%5\n"
3075 /* Return an asm string that atomically:
3077 - Sets memory reference %0 to %0 INSN %1.
3079 SUFFIX is the suffix that should be added to "ll" and "sc"
3081 #define MIPS_SYNC_OP(SUFFIX, INSN) \
3083 "1:\tll" SUFFIX "\t%@,%0\n" \
3084 "\t" INSN "\t%@,%@,%1\n" \
3085 "\tsc" SUFFIX "\t%@,%0\n" \
3086 "\tbeq\t%@,%.,1b\n" \
3090 /* Return an asm string that atomically:
3092 - Given that %1 contains a bit mask and %2 the inverted mask and
3093 that %3 has already been ANDed with %1.
3095 - Sets the selected bits of memory reference %0 to %0 INSN %3.
3097 - Uses scratch register %4.
3099 NOT_OP are the optional instructions to do a bit-wise not
3100 operation in conjunction with an AND INSN to generate a sync_nand
3102 #define MIPS_SYNC_OP_12(INSN, NOT_OP) \
3105 "\tand\t%@,%4,%2\n" \
3107 "\t" INSN "\t%4,%4,%z3\n" \
3108 "\tand\t%4,%4,%1\n" \
3109 "\tor\t%@,%@,%4\n" \
3111 "\tbeq\t%@,%.,1b\n" \
3115 #define MIPS_SYNC_OP_12_NOT_NOP ""
3116 #define MIPS_SYNC_OP_12_NOT_NOT "\tnor\t%4,%4,%.\n"
3118 /* Return an asm string that atomically:
3120 - Given that %2 contains a bit mask and %3 the inverted mask and
3121 that %4 has already been ANDed with %2.
3123 - Sets the selected bits of memory reference %1 to %1 INSN %4.
3125 - Sets %0 to the original value of %1.
3127 - Uses scratch register %5.
3129 NOT_OP are the optional instructions to do a bit-wise not
3130 operation in conjunction with an AND INSN to generate a sync_nand
3133 REG is used in conjunction with NOT_OP and is used to select the
3134 register operated on by the INSN. */
3135 #define MIPS_SYNC_OLD_OP_12(INSN, NOT_OP, REG) \
3138 "\tand\t%@,%0,%3\n" \
3140 "\t" INSN "\t%5," REG ",%z4\n" \
3141 "\tand\t%5,%5,%2\n" \
3142 "\tor\t%@,%@,%5\n" \
3144 "\tbeq\t%@,%.,1b\n" \
3148 #define MIPS_SYNC_OLD_OP_12_NOT_NOP ""
3149 #define MIPS_SYNC_OLD_OP_12_NOT_NOP_REG "%0"
3150 #define MIPS_SYNC_OLD_OP_12_NOT_NOT "\tnor\t%5,%0,%.\n"
3151 #define MIPS_SYNC_OLD_OP_12_NOT_NOT_REG "%5"
3153 /* Return an asm string that atomically:
3155 - Given that %2 contains a bit mask and %3 the inverted mask and
3156 that %4 has already been ANDed with %2.
3158 - Sets the selected bits of memory reference %1 to %1 INSN %4.
3160 - Sets %0 to the new value of %1.
3162 NOT_OP are the optional instructions to do a bit-wise not
3163 operation in conjunction with an AND INSN to generate a sync_nand
3165 #define MIPS_SYNC_NEW_OP_12(INSN, NOT_OP) \
3168 "\tand\t%@,%0,%3\n" \
3170 "\t" INSN "\t%0,%0,%z4\n" \
3171 "\tand\t%0,%0,%2\n" \
3172 "\tor\t%@,%@,%0\n" \
3174 "\tbeq\t%@,%.,1b\n" \
3178 #define MIPS_SYNC_NEW_OP_12_NOT_NOP ""
3179 #define MIPS_SYNC_NEW_OP_12_NOT_NOT "\tnor\t%0,%0,%.\n"
3181 /* Return an asm string that atomically:
3183 - Sets memory reference %1 to %1 INSN %2.
3185 - Sets register %0 to the old value of memory reference %1.
3187 SUFFIX is the suffix that should be added to "ll" and "sc"
3189 #define MIPS_SYNC_OLD_OP(SUFFIX, INSN) \
3191 "1:\tll" SUFFIX "\t%0,%1\n" \
3192 "\t" INSN "\t%@,%0,%2\n" \
3193 "\tsc" SUFFIX "\t%@,%1\n" \
3194 "\tbeq\t%@,%.,1b\n" \
3198 /* Return an asm string that atomically:
3200 - Sets memory reference %1 to %1 INSN %2.
3202 - Sets register %0 to the new value of memory reference %1.
3204 SUFFIX is the suffix that should be added to "ll" and "sc"
3206 #define MIPS_SYNC_NEW_OP(SUFFIX, INSN) \
3208 "1:\tll" SUFFIX "\t%0,%1\n" \
3209 "\t" INSN "\t%@,%0,%2\n" \
3210 "\tsc" SUFFIX "\t%@,%1\n" \
3211 "\tbeq\t%@,%.,1b\n" \
3212 "\t" INSN "\t%0,%0,%2\n" \
3215 /* Return an asm string that atomically:
3217 - Sets memory reference %0 to ~%0 AND %1.
3219 SUFFIX is the suffix that should be added to "ll" and "sc"
3220 instructions. INSN is the and instruction needed to and a register
3222 #define MIPS_SYNC_NAND(SUFFIX, INSN) \
3224 "1:\tll" SUFFIX "\t%@,%0\n" \
3225 "\tnor\t%@,%@,%.\n" \
3226 "\t" INSN "\t%@,%@,%1\n" \
3227 "\tsc" SUFFIX "\t%@,%0\n" \
3228 "\tbeq\t%@,%.,1b\n" \
3232 /* Return an asm string that atomically:
3234 - Sets memory reference %1 to ~%1 AND %2.
3236 - Sets register %0 to the old value of memory reference %1.
3238 SUFFIX is the suffix that should be added to "ll" and "sc"
3239 instructions. INSN is the and instruction needed to and a register
3241 #define MIPS_SYNC_OLD_NAND(SUFFIX, INSN) \
3243 "1:\tll" SUFFIX "\t%0,%1\n" \
3244 "\tnor\t%@,%0,%.\n" \
3245 "\t" INSN "\t%@,%@,%2\n" \
3246 "\tsc" SUFFIX "\t%@,%1\n" \
3247 "\tbeq\t%@,%.,1b\n" \
3251 /* Return an asm string that atomically:
3253 - Sets memory reference %1 to ~%1 AND %2.
3255 - Sets register %0 to the new value of memory reference %1.
3257 SUFFIX is the suffix that should be added to "ll" and "sc"
3258 instructions. INSN is the and instruction needed to and a register
3260 #define MIPS_SYNC_NEW_NAND(SUFFIX, INSN) \
3262 "1:\tll" SUFFIX "\t%0,%1\n" \
3263 "\tnor\t%0,%0,%.\n" \
3264 "\t" INSN "\t%@,%0,%2\n" \
3265 "\tsc" SUFFIX "\t%@,%1\n" \
3266 "\tbeq\t%@,%.,1b\n" \
3267 "\t" INSN "\t%0,%0,%2\n" \
3270 /* Return an asm string that atomically:
3272 - Sets memory reference %1 to %2.
3274 - Sets register %0 to the old value of memory reference %1.
3276 SUFFIX is the suffix that should be added to "ll" and "sc"
3277 instructions. OP is the and instruction that should be used to
3278 load %2 into a register. */
3279 #define MIPS_SYNC_EXCHANGE(SUFFIX, OP) \
3281 "1:\tll" SUFFIX "\t%0,%1\n" \
3282 "\t" OP "\t%@,%2\n" \
3283 "\tsc" SUFFIX "\t%@,%1\n" \
3284 "\tbeq\t%@,%.,1b\n" \
3288 /* Return an asm string that atomically:
3290 - Given that %2 contains an inclusive mask, %3 and exclusive mask
3291 and %4 has already been ANDed with the inclusive mask.
3293 - Sets bits selected by the inclusive mask of memory reference %1
3296 - Sets register %0 to the old value of memory reference %1.
3298 OPS are the instructions needed to OR %4 with %@.
3300 Operand %2 is unused, but needed as to give the test_and_set_12
3301 insn the five operands expected by the expander. */
3302 #define MIPS_SYNC_EXCHANGE_12(OPS) \
3305 "\tand\t%@,%0,%3\n" \
3308 "\tbeq\t%@,%.,1b\n" \
3312 #define MIPS_SYNC_EXCHANGE_12_ZERO_OP ""
3313 #define MIPS_SYNC_EXCHANGE_12_NONZERO_OP "\tor\t%@,%@,%4\n"
3315 #ifndef USED_FOR_TARGET
3316 extern const enum reg_class mips_regno_to_class[];
3317 extern bool mips_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
3318 extern bool mips_print_operand_punct[256];
3319 extern const char *current_function_file; /* filename current function is in */
3320 extern int num_source_filenames; /* current .file # */
3321 extern int set_noreorder; /* # of nested .set noreorder's */
3322 extern int set_nomacro; /* # of nested .set nomacro's */
3323 extern int mips_dbx_regno[];
3324 extern int mips_dwarf_regno[];
3325 extern bool mips_split_p[];
3326 extern bool mips_split_hi_p[];
3327 extern GTY(()) rtx cmp_operands[2];
3328 extern enum processor_type mips_arch; /* which cpu to codegen for */
3329 extern enum processor_type mips_tune; /* which cpu to schedule for */
3330 extern int mips_isa; /* architectural level */
3331 extern int mips_abi; /* which ABI to use */
3332 extern const struct mips_cpu_info *mips_arch_info;
3333 extern const struct mips_cpu_info *mips_tune_info;
3334 extern const struct mips_rtx_cost_data *mips_cost;
3335 extern bool mips_base_mips16;
3336 extern enum mips_code_readable_setting mips_code_readable;
3339 /* Enable querying of DFA units. */
3340 #define CPU_UNITS_QUERY 1
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