1 /* Definitions of target machine for GNU compiler, for ARM.
2 Copyright (C) 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
3 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
4 Contributed by Pieter `Tiggr' Schoenmakers (rcpieter@win.tue.nl)
5 and Martin Simmons (@harleqn.co.uk).
6 More major hacks by Richard Earnshaw (rearnsha@arm.com)
7 Minor hacks by Nick Clifton (nickc@cygnus.com)
9 This file is part of GCC.
11 GCC is free software; you can redistribute it and/or modify it
12 under the terms of the GNU General Public License as published
13 by the Free Software Foundation; either version 2, or (at your
14 option) any later version.
16 GCC is distributed in the hope that it will be useful, but WITHOUT
17 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GCC; see the file COPYING. If not, write to
23 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
24 MA 02111-1307, USA. */
29 /* Target CPU builtins. */
30 #define TARGET_CPU_CPP_BUILTINS() \
33 /* Define __arm__ even when in thumb mode, for \
34 consistency with armcc. */ \
35 builtin_define ("__arm__"); \
37 builtin_define ("__thumb__"); \
41 builtin_define ("__ARMEB__"); \
43 builtin_define ("__THUMBEB__"); \
44 if (TARGET_LITTLE_WORDS) \
45 builtin_define ("__ARMWEL__"); \
49 builtin_define ("__ARMEL__"); \
51 builtin_define ("__THUMBEL__"); \
55 builtin_define ("__APCS_32__"); \
57 builtin_define ("__APCS_26__"); \
59 if (TARGET_SOFT_FLOAT) \
60 builtin_define ("__SOFTFP__"); \
63 builtin_define ("__VFP_FP__"); \
65 /* Add a define for interworking. \
66 Needed when building libgcc.a. */ \
67 if (TARGET_INTERWORK) \
68 builtin_define ("__THUMB_INTERWORK__"); \
70 builtin_assert ("cpu=arm"); \
71 builtin_assert ("machine=arm"); \
74 #define TARGET_CPU_arm2 0x0000
75 #define TARGET_CPU_arm250 0x0000
76 #define TARGET_CPU_arm3 0x0000
77 #define TARGET_CPU_arm6 0x0001
78 #define TARGET_CPU_arm600 0x0001
79 #define TARGET_CPU_arm610 0x0002
80 #define TARGET_CPU_arm7 0x0001
81 #define TARGET_CPU_arm7m 0x0004
82 #define TARGET_CPU_arm7dm 0x0004
83 #define TARGET_CPU_arm7dmi 0x0004
84 #define TARGET_CPU_arm700 0x0001
85 #define TARGET_CPU_arm710 0x0002
86 #define TARGET_CPU_arm7100 0x0002
87 #define TARGET_CPU_arm7500 0x0002
88 #define TARGET_CPU_arm7500fe 0x1001
89 #define TARGET_CPU_arm7tdmi 0x0008
90 #define TARGET_CPU_arm8 0x0010
91 #define TARGET_CPU_arm810 0x0020
92 #define TARGET_CPU_strongarm 0x0040
93 #define TARGET_CPU_strongarm110 0x0040
94 #define TARGET_CPU_strongarm1100 0x0040
95 #define TARGET_CPU_arm9 0x0080
96 #define TARGET_CPU_arm9tdmi 0x0080
97 #define TARGET_CPU_xscale 0x0100
98 #define TARGET_CPU_ep9312 0x0200
99 #define TARGET_CPU_iwmmxt 0x0400
100 #define TARGET_CPU_arm926ejs 0x0800
101 #define TARGET_CPU_arm1026ejs 0x1000
102 #define TARGET_CPU_arm1136js 0x2000
103 #define TARGET_CPU_arm1136jfs 0x4000
104 /* Configure didn't specify. */
105 #define TARGET_CPU_generic 0x8000
107 /* The various ARM cores. */
110 #define ARM_CORE(NAME, FLAGS, COSTS) \
112 #include "arm-cores.def"
114 /* Used to indicate that no processor has been specified. */
118 /* The processor for which instructions should be scheduled. */
119 extern enum processor_type arm_tune;
121 typedef enum arm_cond_code
123 ARM_EQ = 0, ARM_NE, ARM_CS, ARM_CC, ARM_MI, ARM_PL, ARM_VS, ARM_VC,
124 ARM_HI, ARM_LS, ARM_GE, ARM_LT, ARM_GT, ARM_LE, ARM_AL, ARM_NV
128 extern arm_cc arm_current_cc;
130 #define ARM_INVERSE_CONDITION_CODE(X) ((arm_cc) (((int)X) ^ 1))
132 extern int arm_target_label;
133 extern int arm_ccfsm_state;
134 extern GTY(()) rtx arm_target_insn;
135 /* Run-time compilation parameters selecting different hardware subsets. */
136 extern int target_flags;
137 /* The floating point mode. */
138 extern const char *target_fpu_name;
139 /* For backwards compatibility. */
140 extern const char *target_fpe_name;
141 /* Whether to use floating point hardware. */
142 extern const char *target_float_abi_name;
143 /* Which ABI to use. */
144 extern const char *target_abi_name;
145 /* Define the information needed to generate branch insns. This is
146 stored from the compare operation. */
147 extern GTY(()) rtx arm_compare_op0;
148 extern GTY(()) rtx arm_compare_op1;
149 /* The label of the current constant pool. */
150 extern rtx pool_vector_label;
151 /* Set to 1 when a return insn is output, this means that the epilogue
153 extern int return_used_this_function;
154 /* Used to produce AOF syntax assembler. */
155 extern GTY(()) rtx aof_pic_label;
157 /* Just in case configure has failed to define anything. */
158 #ifndef TARGET_CPU_DEFAULT
159 #define TARGET_CPU_DEFAULT TARGET_CPU_generic
162 /* If the configuration file doesn't specify the cpu, the subtarget may
163 override it. If it doesn't, then default to an ARM6. */
164 #if TARGET_CPU_DEFAULT == TARGET_CPU_generic
165 #undef TARGET_CPU_DEFAULT
167 #ifdef SUBTARGET_CPU_DEFAULT
168 #define TARGET_CPU_DEFAULT SUBTARGET_CPU_DEFAULT
170 #define TARGET_CPU_DEFAULT TARGET_CPU_arm6
174 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm2
175 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_2__"
177 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm6 || TARGET_CPU_DEFAULT == TARGET_CPU_arm610 || TARGET_CPU_DEFAULT == TARGET_CPU_arm7500fe
178 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3__"
180 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7m
181 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3M__"
183 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7tdmi || TARGET_CPU_DEFAULT == TARGET_CPU_arm9 || TARGET_CPU_DEFAULT == TARGET_CPU_arm9tdmi
184 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__"
186 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm8 || TARGET_CPU_DEFAULT == TARGET_CPU_arm810 || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm110 || TARGET_CPU_DEFAULT == TARGET_CPU_strongarm1100
187 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4__"
189 #if TARGET_CPU_DEFAULT == TARGET_CPU_xscale
190 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TE__ -D__XSCALE__"
192 #if TARGET_CPU_DEFAULT == TARGET_CPU_ep9312
193 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__ -D__MAVERICK__"
194 /* Set TARGET_DEFAULT to the default, but without soft-float. */
195 #ifdef TARGET_DEFAULT
196 #undef TARGET_DEFAULT
197 #define TARGET_DEFAULT (ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
200 #if TARGET_CPU_DEFAULT == TARGET_CPU_iwmmxt
201 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TE__ -D__XSCALE__ -D__IWMMXT__"
203 #if (TARGET_CPU_DEFAULT == TARGET_CPU_arm926ejs || \
204 TARGET_CPU_DEFAULT == TARGET_CPU_arm1026ejs)
205 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TEJ__"
207 #if (TARGET_CPU_DEFAULT == TARGET_CPU_arm1136js || \
208 TARGET_CPU_DEFAULT == TARGET_CPU_arm1136jfs)
209 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_6J__"
211 #error Unrecognized value in TARGET_CPU_DEFAULT.
224 #define CPP_SPEC "%(cpp_cpu_arch) %(subtarget_cpp_spec) \
225 %{mapcs-32:%{mapcs-26: \
226 %e-mapcs-26 and -mapcs-32 may not be used together}} \
227 %{msoft-float:%{mhard-float: \
228 %e-msoft-float and -mhard_float may not be used together}} \
229 %{mbig-endian:%{mlittle-endian: \
230 %e-mbig-endian and -mlittle-endian may not be used together}}"
232 /* Set the architecture define -- if -march= is set, then it overrides
233 the -mcpu= setting. */
234 #define CPP_CPU_ARCH_SPEC "\
235 %{march=arm2:-D__ARM_ARCH_2__} \
236 %{march=arm250:-D__ARM_ARCH_2__} \
237 %{march=arm3:-D__ARM_ARCH_2__} \
238 %{march=arm6:-D__ARM_ARCH_3__} \
239 %{march=arm600:-D__ARM_ARCH_3__} \
240 %{march=arm610:-D__ARM_ARCH_3__} \
241 %{march=arm7:-D__ARM_ARCH_3__} \
242 %{march=arm700:-D__ARM_ARCH_3__} \
243 %{march=arm710:-D__ARM_ARCH_3__} \
244 %{march=arm720:-D__ARM_ARCH_3__} \
245 %{march=arm7100:-D__ARM_ARCH_3__} \
246 %{march=arm7500:-D__ARM_ARCH_3__} \
247 %{march=arm7500fe:-D__ARM_ARCH_3__} \
248 %{march=arm7m:-D__ARM_ARCH_3M__} \
249 %{march=arm7dm:-D__ARM_ARCH_3M__} \
250 %{march=arm7dmi:-D__ARM_ARCH_3M__} \
251 %{march=arm7tdmi:-D__ARM_ARCH_4T__} \
252 %{march=arm8:-D__ARM_ARCH_4__} \
253 %{march=arm810:-D__ARM_ARCH_4__} \
254 %{march=arm9:-D__ARM_ARCH_4T__} \
255 %{march=arm920:-D__ARM_ARCH_4__} \
256 %{march=arm920t:-D__ARM_ARCH_4T__} \
257 %{march=arm926ejs:-D__ARM_ARCH_5TEJ__} \
258 %{march=arm9tdmi:-D__ARM_ARCH_4T__} \
259 %{march=arm1026ejs:-D__ARM_ARCH_5TEJ__} \
260 %{march=arm1136js:-D__ARM_ARCH_6J__} \
261 %{march=arm1136jfs:-D__ARM_ARCH_6J__} \
262 %{march=strongarm:-D__ARM_ARCH_4__} \
263 %{march=strongarm110:-D__ARM_ARCH_4__} \
264 %{march=strongarm1100:-D__ARM_ARCH_4__} \
265 %{march=xscale:-D__ARM_ARCH_5TE__} \
266 %{march=xscale:-D__XSCALE__} \
267 %{march=ep9312:-D__ARM_ARCH_4T__} \
268 %{march=ep9312:-D__MAVERICK__} \
269 %{march=armv2:-D__ARM_ARCH_2__} \
270 %{march=armv2a:-D__ARM_ARCH_2__} \
271 %{march=armv3:-D__ARM_ARCH_3__} \
272 %{march=armv3m:-D__ARM_ARCH_3M__} \
273 %{march=armv4:-D__ARM_ARCH_4__} \
274 %{march=armv4t:-D__ARM_ARCH_4T__} \
275 %{march=armv5:-D__ARM_ARCH_5__} \
276 %{march=armv5t:-D__ARM_ARCH_5T__} \
277 %{march=armv5e:-D__ARM_ARCH_5E__} \
278 %{march=armv5te:-D__ARM_ARCH_5TE__} \
279 %{march=armv6:-D__ARM_ARCH6__} \
280 %{march=armv6j:-D__ARM_ARCH6J__} \
282 %{mcpu=arm2:-D__ARM_ARCH_2__} \
283 %{mcpu=arm250:-D__ARM_ARCH_2__} \
284 %{mcpu=arm3:-D__ARM_ARCH_2__} \
285 %{mcpu=arm6:-D__ARM_ARCH_3__} \
286 %{mcpu=arm600:-D__ARM_ARCH_3__} \
287 %{mcpu=arm610:-D__ARM_ARCH_3__} \
288 %{mcpu=arm7:-D__ARM_ARCH_3__} \
289 %{mcpu=arm700:-D__ARM_ARCH_3__} \
290 %{mcpu=arm710:-D__ARM_ARCH_3__} \
291 %{mcpu=arm720:-D__ARM_ARCH_3__} \
292 %{mcpu=arm7100:-D__ARM_ARCH_3__} \
293 %{mcpu=arm7500:-D__ARM_ARCH_3__} \
294 %{mcpu=arm7500fe:-D__ARM_ARCH_3__} \
295 %{mcpu=arm7m:-D__ARM_ARCH_3M__} \
296 %{mcpu=arm7dm:-D__ARM_ARCH_3M__} \
297 %{mcpu=arm7dmi:-D__ARM_ARCH_3M__} \
298 %{mcpu=arm7tdmi:-D__ARM_ARCH_4T__} \
299 %{mcpu=arm8:-D__ARM_ARCH_4__} \
300 %{mcpu=arm810:-D__ARM_ARCH_4__} \
301 %{mcpu=arm9:-D__ARM_ARCH_4T__} \
302 %{mcpu=arm920:-D__ARM_ARCH_4__} \
303 %{mcpu=arm920t:-D__ARM_ARCH_4T__} \
304 %{mcpu=arm926ejs:-D__ARM_ARCH_5TEJ__} \
305 %{mcpu=arm9tdmi:-D__ARM_ARCH_4T__} \
306 %{mcpu=arm1026ejs:-D__ARM_ARCH_5TEJ__} \
307 %{mcpu=arm1136js:-D__ARM_ARCH_6J__} \
308 %{mcpu=arm1136jfs:-D__ARM_ARCH_6J__} \
309 %{mcpu=strongarm:-D__ARM_ARCH_4__} \
310 %{mcpu=strongarm110:-D__ARM_ARCH_4__} \
311 %{mcpu=strongarm1100:-D__ARM_ARCH_4__} \
312 %{mcpu=xscale:-D__ARM_ARCH_5TE__} \
313 %{mcpu=xscale:-D__XSCALE__} \
314 %{mcpu=ep9312:-D__ARM_ARCH_4T__} \
315 %{mcpu=ep9312:-D__MAVERICK__} \
316 %{mcpu=iwmmxt:-D__ARM_ARCH_5TE__} \
317 %{mcpu=iwmmxt:-D__XSCALE__} \
318 %{mcpu=iwmmxt:-D__IWMMXT__} \
319 %{!mcpu*:%(cpp_cpu_arch_default)}} \
326 /* This macro defines names of additional specifications to put in the specs
327 that can be used in various specifications like CC1_SPEC. Its definition
328 is an initializer with a subgrouping for each command option.
330 Each subgrouping contains a string constant, that defines the
331 specification name, and a string constant that used by the GCC driver
334 Do not define this macro if it does not need to do anything. */
335 #define EXTRA_SPECS \
336 { "cpp_cpu_arch", CPP_CPU_ARCH_SPEC }, \
337 { "cpp_cpu_arch_default", CPP_ARCH_DEFAULT_SPEC }, \
338 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
339 SUBTARGET_EXTRA_SPECS
341 #ifndef SUBTARGET_EXTRA_SPECS
342 #define SUBTARGET_EXTRA_SPECS
345 #ifndef SUBTARGET_CPP_SPEC
346 #define SUBTARGET_CPP_SPEC ""
349 /* Run-time Target Specification. */
350 #ifndef TARGET_VERSION
351 #define TARGET_VERSION fputs (" (ARM/generic)", stderr);
354 /* Nonzero if the function prologue (and epilogue) should obey
355 the ARM Procedure Call Standard. */
356 #define ARM_FLAG_APCS_FRAME (1 << 0)
358 /* Nonzero if the function prologue should output the function name to enable
359 the post mortem debugger to print a backtrace (very useful on RISCOS,
360 unused on RISCiX). Specifying this flag also enables
361 -fno-omit-frame-pointer.
362 XXX Must still be implemented in the prologue. */
363 #define ARM_FLAG_POKE (1 << 1)
365 /* Nonzero if floating point instructions are emulated by the FPE, in which
366 case instruction scheduling becomes very uninteresting. */
367 #define ARM_FLAG_FPE (1 << 2)
369 /* Nonzero if destined for a processor in 32-bit program mode. Takes out bit
370 that assume restoration of the condition flags when returning from a
371 branch and link (ie a function). */
372 #define ARM_FLAG_APCS_32 (1 << 3)
374 /* FLAGS 0x0008 and 0x0010 are now spare (used to be arm3/6 selection). */
376 /* Nonzero if stack checking should be performed on entry to each function
377 which allocates temporary variables on the stack. */
378 #define ARM_FLAG_APCS_STACK (1 << 4)
380 /* Nonzero if floating point parameters should be passed to functions in
381 floating point registers. */
382 #define ARM_FLAG_APCS_FLOAT (1 << 5)
384 /* Nonzero if re-entrant, position independent code should be generated.
385 This is equivalent to -fpic. */
386 #define ARM_FLAG_APCS_REENT (1 << 6)
388 /* Nonzero if the MMU will trap unaligned word accesses, so shorts must
389 be loaded using either LDRH or LDRB instructions. */
390 #define ARM_FLAG_MMU_TRAPS (1 << 7)
392 /* Nonzero if all floating point instructions are missing (and there is no
393 emulator either). Generate function calls for all ops in this case. */
394 #define ARM_FLAG_SOFT_FLOAT (1 << 8)
396 /* Nonzero if we should compile with BYTES_BIG_ENDIAN set to 1. */
397 #define ARM_FLAG_BIG_END (1 << 9)
399 /* Nonzero if we should compile for Thumb interworking. */
400 #define ARM_FLAG_INTERWORK (1 << 10)
402 /* Nonzero if we should have little-endian words even when compiling for
403 big-endian (for backwards compatibility with older versions of GCC). */
404 #define ARM_FLAG_LITTLE_WORDS (1 << 11)
406 /* Nonzero if we need to protect the prolog from scheduling */
407 #define ARM_FLAG_NO_SCHED_PRO (1 << 12)
409 /* Nonzero if a call to abort should be generated if a noreturn
410 function tries to return. */
411 #define ARM_FLAG_ABORT_NORETURN (1 << 13)
413 /* Nonzero if function prologues should not load the PIC register. */
414 #define ARM_FLAG_SINGLE_PIC_BASE (1 << 14)
416 /* Nonzero if all call instructions should be indirect. */
417 #define ARM_FLAG_LONG_CALLS (1 << 15)
419 /* Nonzero means that the target ISA is the THUMB, not the ARM. */
420 #define ARM_FLAG_THUMB (1 << 16)
422 /* Set if a TPCS style stack frame should be generated, for non-leaf
423 functions, even if they do not need one. */
424 #define THUMB_FLAG_BACKTRACE (1 << 17)
426 /* Set if a TPCS style stack frame should be generated, for leaf
427 functions, even if they do not need one. */
428 #define THUMB_FLAG_LEAF_BACKTRACE (1 << 18)
430 /* Set if externally visible functions should assume that they
431 might be called in ARM mode, from a non-thumb aware code. */
432 #define THUMB_FLAG_CALLEE_SUPER_INTERWORKING (1 << 19)
434 /* Set if calls via function pointers should assume that their
435 destination is non-Thumb aware. */
436 #define THUMB_FLAG_CALLER_SUPER_INTERWORKING (1 << 20)
438 /* Fix invalid Cirrus instruction combinations by inserting NOPs. */
439 #define CIRRUS_FIX_INVALID_INSNS (1 << 21)
441 #define TARGET_APCS_FRAME (target_flags & ARM_FLAG_APCS_FRAME)
442 #define TARGET_POKE_FUNCTION_NAME (target_flags & ARM_FLAG_POKE)
443 #define TARGET_FPE (target_flags & ARM_FLAG_FPE)
444 #define TARGET_APCS_32 (target_flags & ARM_FLAG_APCS_32)
445 #define TARGET_APCS_STACK (target_flags & ARM_FLAG_APCS_STACK)
446 #define TARGET_APCS_FLOAT (target_flags & ARM_FLAG_APCS_FLOAT)
447 #define TARGET_APCS_REENT (target_flags & ARM_FLAG_APCS_REENT)
448 #define TARGET_MMU_TRAPS (target_flags & ARM_FLAG_MMU_TRAPS)
449 #define TARGET_SOFT_FLOAT (arm_float_abi == ARM_FLOAT_ABI_SOFT)
450 #define TARGET_SOFT_FLOAT_ABI (arm_float_abi != ARM_FLOAT_ABI_HARD)
451 #define TARGET_HARD_FLOAT (arm_float_abi == ARM_FLOAT_ABI_HARD)
452 #define TARGET_FPA (arm_fp_model == ARM_FP_MODEL_FPA)
453 #define TARGET_MAVERICK (arm_fp_model == ARM_FP_MODEL_MAVERICK)
454 #define TARGET_VFP (arm_fp_model == ARM_FP_MODEL_VFP)
455 #define TARGET_IWMMXT (arm_arch_iwmmxt)
456 #define TARGET_REALLY_IWMMXT (TARGET_IWMMXT && TARGET_ARM)
457 #define TARGET_IWMMXT_ABI (TARGET_ARM && arm_abi == ARM_ABI_IWMMXT)
458 #define TARGET_BIG_END (target_flags & ARM_FLAG_BIG_END)
459 #define TARGET_INTERWORK (target_flags & ARM_FLAG_INTERWORK)
460 #define TARGET_LITTLE_WORDS (target_flags & ARM_FLAG_LITTLE_WORDS)
461 #define TARGET_NO_SCHED_PRO (target_flags & ARM_FLAG_NO_SCHED_PRO)
462 #define TARGET_ABORT_NORETURN (target_flags & ARM_FLAG_ABORT_NORETURN)
463 #define TARGET_SINGLE_PIC_BASE (target_flags & ARM_FLAG_SINGLE_PIC_BASE)
464 #define TARGET_LONG_CALLS (target_flags & ARM_FLAG_LONG_CALLS)
465 #define TARGET_THUMB (target_flags & ARM_FLAG_THUMB)
466 #define TARGET_ARM (! TARGET_THUMB)
467 #define TARGET_EITHER 1 /* (TARGET_ARM | TARGET_THUMB) */
468 #define TARGET_CALLEE_INTERWORKING (target_flags & THUMB_FLAG_CALLEE_SUPER_INTERWORKING)
469 #define TARGET_CALLER_INTERWORKING (target_flags & THUMB_FLAG_CALLER_SUPER_INTERWORKING)
470 #define TARGET_BACKTRACE (leaf_function_p () \
471 ? (target_flags & THUMB_FLAG_LEAF_BACKTRACE) \
472 : (target_flags & THUMB_FLAG_BACKTRACE))
473 #define TARGET_CIRRUS_FIX_INVALID_INSNS (target_flags & CIRRUS_FIX_INVALID_INSNS)
475 /* SUBTARGET_SWITCHES is used to add flags on a per-config basis. */
476 #ifndef SUBTARGET_SWITCHES
477 #define SUBTARGET_SWITCHES
480 #define TARGET_SWITCHES \
482 {"apcs", ARM_FLAG_APCS_FRAME, "" }, \
483 {"apcs-frame", ARM_FLAG_APCS_FRAME, \
484 N_("Generate APCS conformant stack frames") }, \
485 {"no-apcs-frame", -ARM_FLAG_APCS_FRAME, "" }, \
486 {"poke-function-name", ARM_FLAG_POKE, \
487 N_("Store function names in object code") }, \
488 {"no-poke-function-name", -ARM_FLAG_POKE, "" }, \
489 {"fpe", ARM_FLAG_FPE, "" }, \
490 {"apcs-32", ARM_FLAG_APCS_32, \
491 N_("Use the 32-bit version of the APCS") }, \
492 {"apcs-26", -ARM_FLAG_APCS_32, \
493 N_("Use the 26-bit version of the APCS") }, \
494 {"apcs-stack-check", ARM_FLAG_APCS_STACK, "" }, \
495 {"no-apcs-stack-check", -ARM_FLAG_APCS_STACK, "" }, \
496 {"apcs-float", ARM_FLAG_APCS_FLOAT, \
497 N_("Pass FP arguments in FP registers") }, \
498 {"no-apcs-float", -ARM_FLAG_APCS_FLOAT, "" }, \
499 {"apcs-reentrant", ARM_FLAG_APCS_REENT, \
500 N_("Generate re-entrant, PIC code") }, \
501 {"no-apcs-reentrant", -ARM_FLAG_APCS_REENT, "" }, \
502 {"alignment-traps", ARM_FLAG_MMU_TRAPS, \
503 N_("The MMU will trap on unaligned accesses") }, \
504 {"no-alignment-traps", -ARM_FLAG_MMU_TRAPS, "" }, \
505 {"short-load-bytes", ARM_FLAG_MMU_TRAPS, "" }, \
506 {"no-short-load-bytes", -ARM_FLAG_MMU_TRAPS, "" }, \
507 {"short-load-words", -ARM_FLAG_MMU_TRAPS, "" }, \
508 {"no-short-load-words", ARM_FLAG_MMU_TRAPS, "" }, \
509 {"soft-float", ARM_FLAG_SOFT_FLOAT, \
510 N_("Use library calls to perform FP operations") }, \
511 {"hard-float", -ARM_FLAG_SOFT_FLOAT, \
512 N_("Use hardware floating point instructions") }, \
513 {"big-endian", ARM_FLAG_BIG_END, \
514 N_("Assume target CPU is configured as big endian") }, \
515 {"little-endian", -ARM_FLAG_BIG_END, \
516 N_("Assume target CPU is configured as little endian") }, \
517 {"words-little-endian", ARM_FLAG_LITTLE_WORDS, \
518 N_("Assume big endian bytes, little endian words") }, \
519 {"thumb-interwork", ARM_FLAG_INTERWORK, \
520 N_("Support calls between Thumb and ARM instruction sets") }, \
521 {"no-thumb-interwork", -ARM_FLAG_INTERWORK, "" }, \
522 {"abort-on-noreturn", ARM_FLAG_ABORT_NORETURN, \
523 N_("Generate a call to abort if a noreturn function returns")}, \
524 {"no-abort-on-noreturn", -ARM_FLAG_ABORT_NORETURN, "" }, \
525 {"no-sched-prolog", ARM_FLAG_NO_SCHED_PRO, \
526 N_("Do not move instructions into a function's prologue") }, \
527 {"sched-prolog", -ARM_FLAG_NO_SCHED_PRO, "" }, \
528 {"single-pic-base", ARM_FLAG_SINGLE_PIC_BASE, \
529 N_("Do not load the PIC register in function prologues") }, \
530 {"no-single-pic-base", -ARM_FLAG_SINGLE_PIC_BASE, "" }, \
531 {"long-calls", ARM_FLAG_LONG_CALLS, \
532 N_("Generate call insns as indirect calls, if necessary") }, \
533 {"no-long-calls", -ARM_FLAG_LONG_CALLS, "" }, \
534 {"thumb", ARM_FLAG_THUMB, \
535 N_("Compile for the Thumb not the ARM") }, \
536 {"no-thumb", -ARM_FLAG_THUMB, "" }, \
537 {"arm", -ARM_FLAG_THUMB, "" }, \
538 {"tpcs-frame", THUMB_FLAG_BACKTRACE, \
539 N_("Thumb: Generate (non-leaf) stack frames even if not needed") }, \
540 {"no-tpcs-frame", -THUMB_FLAG_BACKTRACE, "" }, \
541 {"tpcs-leaf-frame", THUMB_FLAG_LEAF_BACKTRACE, \
542 N_("Thumb: Generate (leaf) stack frames even if not needed") }, \
543 {"no-tpcs-leaf-frame", -THUMB_FLAG_LEAF_BACKTRACE, "" }, \
544 {"callee-super-interworking", THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
545 N_("Thumb: Assume non-static functions may be called from ARM code") }, \
546 {"no-callee-super-interworking", -THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
548 {"caller-super-interworking", THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
549 N_("Thumb: Assume function pointers may go to non-Thumb aware code") }, \
550 {"no-caller-super-interworking", -THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
552 {"cirrus-fix-invalid-insns", CIRRUS_FIX_INVALID_INSNS, \
553 N_("Cirrus: Place NOPs to avoid invalid instruction combinations") }, \
554 {"no-cirrus-fix-invalid-insns", -CIRRUS_FIX_INVALID_INSNS, \
555 N_("Cirrus: Do not break up invalid instruction combinations with NOPs") },\
557 {"", TARGET_DEFAULT, "" } \
560 #define TARGET_OPTIONS \
562 {"cpu=", & arm_select[0].string, \
563 N_("Specify the name of the target CPU"), 0}, \
564 {"arch=", & arm_select[1].string, \
565 N_("Specify the name of the target architecture"), 0}, \
566 {"tune=", & arm_select[2].string, "", 0}, \
567 {"fpe=", & target_fpe_name, "", 0}, \
568 {"fp=", & target_fpe_name, "", 0}, \
569 {"fpu=", & target_fpu_name, \
570 N_("Specify the name of the target floating point hardware/format"), 0}, \
571 {"float-abi=", & target_float_abi_name, \
572 N_("Specify if floating point hardware should be used"), 0}, \
573 {"structure-size-boundary=", & structure_size_string, \
574 N_("Specify the minimum bit alignment of structures"), 0}, \
575 {"pic-register=", & arm_pic_register_string, \
576 N_("Specify the register to be used for PIC addressing"), 0}, \
577 {"abi=", &target_abi_name, N_("Specify an ABI"), 0} \
580 /* Support for a compile-time default CPU, et cetera. The rules are:
581 --with-arch is ignored if -march or -mcpu are specified.
582 --with-cpu is ignored if -march or -mcpu are specified, and is overridden
584 --with-tune is ignored if -mtune or -mcpu are specified (but not affected
586 --with-float is ignored if -mhard-float, -msoft-float or -mfloat-abi are
588 --with-fpu is ignored if -mfpu is specified.
589 --with-abi is ignored is -mabi is specified. */
590 #define OPTION_DEFAULT_SPECS \
591 {"arch", "%{!march=*:%{!mcpu=*:-march=%(VALUE)}}" }, \
592 {"cpu", "%{!march=*:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
593 {"tune", "%{!mcpu=*:%{!mtune=*:-mtune=%(VALUE)}}" }, \
595 "%{!msoft-float:%{!mhard-float:%{!mfloat-abi=*:-mfloat-abi=%(VALUE)}}}" }, \
596 {"fpu", "%{!mfpu=*:-mfpu=%(VALUE)}"}, \
597 {"abi", "%{!mabi=*:-mabi=%(VALUE)}"},
599 struct arm_cpu_select
603 const struct processors * processors;
606 /* This is a magic array. If the user specifies a command line switch
607 which matches one of the entries in TARGET_OPTIONS then the corresponding
608 string pointer will be set to the value specified by the user. */
609 extern struct arm_cpu_select arm_select[];
617 /* Recast the program mode class to be the prog_mode attribute. */
618 #define arm_prog_mode ((enum attr_prog_mode) arm_prgmode)
620 extern enum prog_mode_type arm_prgmode;
622 /* Which floating point model to use. */
625 ARM_FP_MODEL_UNKNOWN,
626 /* FPA model (Hardware or software). */
628 /* Cirrus Maverick floating point model. */
629 ARM_FP_MODEL_MAVERICK,
630 /* VFP floating point model. */
634 extern enum arm_fp_model arm_fp_model;
636 /* Which floating point hardware is available. Also update
637 fp_model_for_fpu in arm.c when adding entries to this list. */
640 /* No FP hardware. */
642 /* Full FPA support. */
644 /* Emulated FPA hardware, Issue 2 emulator (no LFM/SFM). */
646 /* Emulated FPA hardware, Issue 3 emulator. */
648 /* Cirrus Maverick floating point co-processor. */
654 /* Recast the floating point class to be the floating point attribute. */
655 #define arm_fpu_attr ((enum attr_fpu) arm_fpu_tune)
657 /* What type of floating point to tune for */
658 extern enum fputype arm_fpu_tune;
660 /* What type of floating point instructions are available */
661 extern enum fputype arm_fpu_arch;
666 ARM_FLOAT_ABI_SOFTFP,
670 extern enum float_abi_type arm_float_abi;
672 /* Default floating point architecture. Override in sub-target if
674 FIXME: Is this still necessary/desirable? Do we want VFP chips to
675 default to VFP unless overridden by a subtarget? If so it would be best
676 to remove these definitions. It also assumes there is only one cpu model
677 with a Maverick fpu. */
678 #ifndef FPUTYPE_DEFAULT
679 #define FPUTYPE_DEFAULT FPUTYPE_FPA_EMU2
682 #if TARGET_CPU_DEFAULT == TARGET_CPU_ep9312
683 #undef FPUTYPE_DEFAULT
684 #define FPUTYPE_DEFAULT FPUTYPE_MAVERICK
687 /* Which ABI to use. */
696 extern enum arm_abi_type arm_abi;
698 #ifndef ARM_DEFAULT_ABI
699 #define ARM_DEFAULT_ABI ARM_ABI_APCS
702 /* Nonzero if this chip supports the ARM Architecture 3M extensions. */
703 extern int arm_arch3m;
705 /* Nonzero if this chip supports the ARM Architecture 4 extensions. */
706 extern int arm_arch4;
708 /* Nonzero if this chip supports the ARM Architecture 5 extensions. */
709 extern int arm_arch5;
711 /* Nonzero if this chip supports the ARM Architecture 5E extensions. */
712 extern int arm_arch5e;
714 /* Nonzero if this chip supports the ARM Architecture 6 extensions. */
715 extern int arm_arch6;
717 /* Nonzero if this chip can benefit from load scheduling. */
718 extern int arm_ld_sched;
720 /* Nonzero if generating thumb code. */
721 extern int thumb_code;
723 /* Nonzero if this chip is a StrongARM. */
724 extern int arm_is_strong;
726 /* Nonzero if this chip is a Cirrus variant. */
727 extern int arm_is_cirrus;
729 /* Nonzero if this chip supports Intel XScale with Wireless MMX technology. */
730 extern int arm_arch_iwmmxt;
732 /* Nonzero if this chip is an XScale. */
733 extern int arm_arch_xscale;
735 /* Nonzero if tuning for XScale */
736 extern int arm_tune_xscale;
738 /* Nonzero if this chip is an ARM6 or an ARM7. */
739 extern int arm_is_6_or_7;
741 #ifndef TARGET_DEFAULT
742 #define TARGET_DEFAULT (ARM_FLAG_APCS_FRAME)
745 /* The frame pointer register used in gcc has nothing to do with debugging;
746 that is controlled by the APCS-FRAME option. */
747 #define CAN_DEBUG_WITHOUT_FP
749 #undef TARGET_MEM_FUNCTIONS
750 #define TARGET_MEM_FUNCTIONS 1
752 #define OVERRIDE_OPTIONS arm_override_options ()
754 /* Nonzero if PIC code requires explicit qualifiers to generate
755 PLT and GOT relocs rather than the assembler doing so implicitly.
756 Subtargets can override these if required. */
757 #ifndef NEED_GOT_RELOC
758 #define NEED_GOT_RELOC 0
760 #ifndef NEED_PLT_RELOC
761 #define NEED_PLT_RELOC 0
764 /* Nonzero if we need to refer to the GOT with a PC-relative
765 offset. In other words, generate
767 .word _GLOBAL_OFFSET_TABLE_ - [. - (.Lxx + 8)]
771 .word _GLOBAL_OFFSET_TABLE_ - (.Lxx + 8)
773 The default is true, which matches NetBSD. Subtargets can
774 override this if required. */
779 /* Target machine storage Layout. */
782 /* Define this macro if it is advisable to hold scalars in registers
783 in a wider mode than that declared by the program. In such cases,
784 the value is constrained to be within the bounds of the declared
785 type, but kept valid in the wider mode. The signedness of the
786 extension may differ from that of the type. */
788 /* It is far faster to zero extend chars than to sign extend them */
790 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
791 if (GET_MODE_CLASS (MODE) == MODE_INT \
792 && GET_MODE_SIZE (MODE) < 4) \
794 if (MODE == QImode) \
796 else if (MODE == HImode) \
797 UNSIGNEDP = TARGET_MMU_TRAPS != 0; \
801 #define PROMOTE_FUNCTION_MODE(MODE, UNSIGNEDP, TYPE) \
802 if (GET_MODE_CLASS (MODE) == MODE_INT \
803 && GET_MODE_SIZE (MODE) < 4) \
806 /* Define this if most significant bit is lowest numbered
807 in instructions that operate on numbered bit-fields. */
808 #define BITS_BIG_ENDIAN 0
810 /* Define this if most significant byte of a word is the lowest numbered.
811 Most ARM processors are run in little endian mode, so that is the default.
812 If you want to have it run-time selectable, change the definition in a
813 cover file to be TARGET_BIG_ENDIAN. */
814 #define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0)
816 /* Define this if most significant word of a multiword number is the lowest
818 This is always false, even when in big-endian mode. */
819 #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN && ! TARGET_LITTLE_WORDS)
821 /* LIBGCC2_WORDS_BIG_ENDIAN has to be a constant, so we define this based
822 on processor pre-defineds when compiling libgcc2.c. */
823 #if defined(__ARMEB__) && !defined(__ARMWEL__)
824 #define LIBGCC2_WORDS_BIG_ENDIAN 1
826 #define LIBGCC2_WORDS_BIG_ENDIAN 0
829 /* Define this if most significant word of doubles is the lowest numbered.
830 The rules are different based on whether or not we use FPA-format,
831 VFP-format or some other floating point co-processor's format doubles. */
832 #define FLOAT_WORDS_BIG_ENDIAN (arm_float_words_big_endian ())
834 #define UNITS_PER_WORD 4
836 /* True if natural alignment is used for doubleword types. */
837 #define ARM_DOUBLEWORD_ALIGN \
838 (arm_abi == ARM_ABI_AAPCS || arm_abi == ARM_ABI_IWMMXT)
839 #define DOUBLEWORD_ALIGNMENT 64
841 #define PARM_BOUNDARY 32
843 #define STACK_BOUNDARY (ARM_DOUBLEWORD_ALIGN ? DOUBLEWORD_ALIGNMENT : 32)
845 #define PREFERRED_STACK_BOUNDARY \
846 (arm_abi == ARM_ABI_ATPCS ? 64 : STACK_BOUNDARY)
848 #define FUNCTION_BOUNDARY 32
850 /* The lowest bit is used to indicate Thumb-mode functions, so the
851 vbit must go into the delta field of pointers to member
853 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
855 #define EMPTY_FIELD_BOUNDARY 32
857 #define BIGGEST_ALIGNMENT (ARM_DOUBLEWORD_ALIGN ? DOUBLEWORD_ALIGNMENT : 32)
859 /* XXX Blah -- this macro is used directly by libobjc. Since it
860 supports no vector modes, cut out the complexity and fall back
861 on BIGGEST_FIELD_ALIGNMENT. */
862 #ifdef IN_TARGET_LIBS
863 #define BIGGEST_FIELD_ALIGNMENT 64
866 /* Make strings word-aligned so strcpy from constants will be faster. */
867 #define CONSTANT_ALIGNMENT_FACTOR (TARGET_THUMB || ! arm_tune_xscale ? 1 : 2)
869 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
870 ((TREE_CODE (EXP) == STRING_CST \
871 && (ALIGN) < BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR) \
872 ? BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR : (ALIGN))
874 /* Setting STRUCTURE_SIZE_BOUNDARY to 32 produces more efficient code, but the
875 value set in previous versions of this toolchain was 8, which produces more
876 compact structures. The command line option -mstructure_size_boundary=<n>
877 can be used to change this value. For compatibility with the ARM SDK
878 however the value should be left at 32. ARM SDT Reference Manual (ARM DUI
879 0020D) page 2-20 says "Structures are aligned on word boundaries".
880 The AAPCS specifies a value of 8. */
881 #define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary
882 extern int arm_structure_size_boundary;
884 /* This is the value used to initialize arm_structure_size_boundary. If a
885 particular arm target wants to change the default value it should change
886 the definition of this macro, not STRUCTURE_SIZE_BOUNDARY. See netbsd.h
887 for an example of this. */
888 #ifndef DEFAULT_STRUCTURE_SIZE_BOUNDARY
889 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 32
892 /* Used when parsing command line option -mstructure_size_boundary. */
893 extern const char * structure_size_string;
895 /* Nonzero if move instructions will actually fail to work
896 when given unaligned data. */
897 #define STRICT_ALIGNMENT 1
899 /* Standard register usage. */
901 /* Register allocation in ARM Procedure Call Standard (as used on RISCiX):
902 (S - saved over call).
904 r0 * argument word/integer result
907 r4-r8 S register variable
908 r9 S (rfp) register variable (real frame pointer)
910 r10 F S (sl) stack limit (used by -mapcs-stack-check)
911 r11 F S (fp) argument pointer
912 r12 (ip) temp workspace
913 r13 F S (sp) lower end of current stack frame
914 r14 (lr) link address/workspace
915 r15 F (pc) program counter
917 f0 floating point result
918 f1-f3 floating point scratch
920 f4-f7 S floating point variable
922 cc This is NOT a real register, but is used internally
923 to represent things that use or set the condition
925 sfp This isn't either. It is used during rtl generation
926 since the offset between the frame pointer and the
927 auto's isn't known until after register allocation.
928 afp Nor this, we only need this because of non-local
929 goto. Without it fp appears to be used and the
930 elimination code won't get rid of sfp. It tracks
931 fp exactly at all times.
933 *: See CONDITIONAL_REGISTER_USAGE */
936 mvf0 Cirrus floating point result
937 mvf1-mvf3 Cirrus floating point scratch
938 mvf4-mvf15 S Cirrus floating point variable. */
940 /* s0-s15 VFP scratch (aka d0-d7).
941 s16-s31 S VFP variable (aka d8-d15).
942 vfpcc Not a real register. Represents the VFP condition
945 /* The stack backtrace structure is as follows:
946 fp points to here: | save code pointer | [fp]
947 | return link value | [fp, #-4]
948 | return sp value | [fp, #-8]
949 | return fp value | [fp, #-12]
950 [| saved r10 value |]
961 [| saved f7 value |] three words
962 [| saved f6 value |] three words
963 [| saved f5 value |] three words
964 [| saved f4 value |] three words
965 r0-r3 are not normally saved in a C function. */
967 /* 1 for registers that have pervasive standard uses
968 and are not available for the register allocator. */
969 #define FIXED_REGISTERS \
987 /* 1 for registers not available across function calls.
988 These must include the FIXED_REGISTERS and also any
989 registers that can be used without being saved.
990 The latter must include the registers where values are returned
991 and the register where structure-value addresses are passed.
992 Aside from that, you can include as many other registers as you like.
993 The CC is not preserved over function calls on the ARM 6, so it is
994 easier to assume this for all. SFP is preserved, since FP is. */
995 #define CALL_USED_REGISTERS \
1013 #ifndef SUBTARGET_CONDITIONAL_REGISTER_USAGE
1014 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE
1017 #define CONDITIONAL_REGISTER_USAGE \
1021 if (TARGET_SOFT_FLOAT || TARGET_THUMB || !TARGET_FPA) \
1023 for (regno = FIRST_FPA_REGNUM; \
1024 regno <= LAST_FPA_REGNUM; ++regno) \
1025 fixed_regs[regno] = call_used_regs[regno] = 1; \
1028 if (TARGET_THUMB && optimize_size) \
1030 /* When optimizing for size, it's better not to use \
1031 the HI regs, because of the overhead of stacking \
1033 for (regno = FIRST_HI_REGNUM; \
1034 regno <= LAST_HI_REGNUM; ++regno) \
1035 fixed_regs[regno] = call_used_regs[regno] = 1; \
1038 /* The link register can be clobbered by any branch insn, \
1039 but we have no way to track that at present, so mark \
1040 it as unavailable. */ \
1042 fixed_regs[LR_REGNUM] = call_used_regs[LR_REGNUM] = 1; \
1044 if (TARGET_ARM && TARGET_HARD_FLOAT) \
1046 if (TARGET_MAVERICK) \
1048 for (regno = FIRST_FPA_REGNUM; \
1049 regno <= LAST_FPA_REGNUM; ++ regno) \
1050 fixed_regs[regno] = call_used_regs[regno] = 1; \
1051 for (regno = FIRST_CIRRUS_FP_REGNUM; \
1052 regno <= LAST_CIRRUS_FP_REGNUM; ++ regno) \
1054 fixed_regs[regno] = 0; \
1055 call_used_regs[regno] = regno < FIRST_CIRRUS_FP_REGNUM + 4; \
1060 for (regno = FIRST_VFP_REGNUM; \
1061 regno <= LAST_VFP_REGNUM; ++ regno) \
1063 fixed_regs[regno] = 0; \
1064 call_used_regs[regno] = regno < FIRST_VFP_REGNUM + 16; \
1069 if (TARGET_REALLY_IWMMXT) \
1071 regno = FIRST_IWMMXT_GR_REGNUM; \
1072 /* The 2002/10/09 revision of the XScale ABI has wCG0 \
1073 and wCG1 as call-preserved registers. The 2002/11/21 \
1074 revision changed this so that all wCG registers are \
1075 scratch registers. */ \
1076 for (regno = FIRST_IWMMXT_GR_REGNUM; \
1077 regno <= LAST_IWMMXT_GR_REGNUM; ++ regno) \
1078 fixed_regs[regno] = call_used_regs[regno] = 0; \
1079 /* The XScale ABI has wR0 - wR9 as scratch registers, \
1080 the rest as call-preserved registers. */ \
1081 for (regno = FIRST_IWMMXT_REGNUM; \
1082 regno <= LAST_IWMMXT_REGNUM; ++ regno) \
1084 fixed_regs[regno] = 0; \
1085 call_used_regs[regno] = regno < FIRST_IWMMXT_REGNUM + 10; \
1089 if ((unsigned) PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM) \
1091 fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
1092 call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
1094 else if (TARGET_APCS_STACK) \
1096 fixed_regs[10] = 1; \
1097 call_used_regs[10] = 1; \
1099 if (TARGET_APCS_FRAME) \
1101 fixed_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
1102 call_used_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
1104 SUBTARGET_CONDITIONAL_REGISTER_USAGE \
1107 /* These are a couple of extensions to the formats accepted
1109 %@ prints out ASM_COMMENT_START
1110 %r prints out REGISTER_PREFIX reg_names[arg] */
1111 #define ASM_FPRINTF_EXTENSIONS(FILE, ARGS, P) \
1113 fputs (ASM_COMMENT_START, FILE); \
1117 fputs (REGISTER_PREFIX, FILE); \
1118 fputs (reg_names [va_arg (ARGS, int)], FILE); \
1121 /* Round X up to the nearest word. */
1122 #define ROUND_UP_WORD(X) (((X) + 3) & ~3)
1124 /* Convert fron bytes to ints. */
1125 #define ARM_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
1127 /* The number of (integer) registers required to hold a quantity of type MODE.
1128 Also used for VFP registers. */
1129 #define ARM_NUM_REGS(MODE) \
1130 ARM_NUM_INTS (GET_MODE_SIZE (MODE))
1132 /* The number of (integer) registers required to hold a quantity of TYPE MODE. */
1133 #define ARM_NUM_REGS2(MODE, TYPE) \
1134 ARM_NUM_INTS ((MODE) == BLKmode ? \
1135 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
1137 /* The number of (integer) argument register available. */
1138 #define NUM_ARG_REGS 4
1140 /* Return the register number of the N'th (integer) argument. */
1141 #define ARG_REGISTER(N) (N - 1)
1143 /* Specify the registers used for certain standard purposes.
1144 The values of these macros are register numbers. */
1146 /* The number of the last argument register. */
1147 #define LAST_ARG_REGNUM ARG_REGISTER (NUM_ARG_REGS)
1149 /* The numbers of the Thumb register ranges. */
1150 #define FIRST_LO_REGNUM 0
1151 #define LAST_LO_REGNUM 7
1152 #define FIRST_HI_REGNUM 8
1153 #define LAST_HI_REGNUM 11
1155 /* The register that holds the return address in exception handlers. */
1156 #define EXCEPTION_LR_REGNUM 2
1158 /* The native (Norcroft) Pascal compiler for the ARM passes the static chain
1159 as an invisible last argument (possible since varargs don't exist in
1160 Pascal), so the following is not true. */
1161 #define STATIC_CHAIN_REGNUM (TARGET_ARM ? 12 : 9)
1163 /* Define this to be where the real frame pointer is if it is not possible to
1164 work out the offset between the frame pointer and the automatic variables
1165 until after register allocation has taken place. FRAME_POINTER_REGNUM
1166 should point to a special register that we will make sure is eliminated.
1168 For the Thumb we have another problem. The TPCS defines the frame pointer
1169 as r11, and GCC believes that it is always possible to use the frame pointer
1170 as base register for addressing purposes. (See comments in
1171 find_reloads_address()). But - the Thumb does not allow high registers,
1172 including r11, to be used as base address registers. Hence our problem.
1174 The solution used here, and in the old thumb port is to use r7 instead of
1175 r11 as the hard frame pointer and to have special code to generate
1176 backtrace structures on the stack (if required to do so via a command line
1177 option) using r11. This is the only 'user visible' use of r11 as a frame
1179 #define ARM_HARD_FRAME_POINTER_REGNUM 11
1180 #define THUMB_HARD_FRAME_POINTER_REGNUM 7
1182 #define HARD_FRAME_POINTER_REGNUM \
1184 ? ARM_HARD_FRAME_POINTER_REGNUM \
1185 : THUMB_HARD_FRAME_POINTER_REGNUM)
1187 #define FP_REGNUM HARD_FRAME_POINTER_REGNUM
1189 /* Register to use for pushing function arguments. */
1190 #define STACK_POINTER_REGNUM SP_REGNUM
1192 /* ARM floating pointer registers. */
1193 #define FIRST_FPA_REGNUM 16
1194 #define LAST_FPA_REGNUM 23
1196 #define FIRST_IWMMXT_GR_REGNUM 43
1197 #define LAST_IWMMXT_GR_REGNUM 46
1198 #define FIRST_IWMMXT_REGNUM 47
1199 #define LAST_IWMMXT_REGNUM 62
1200 #define IS_IWMMXT_REGNUM(REGNUM) \
1201 (((REGNUM) >= FIRST_IWMMXT_REGNUM) && ((REGNUM) <= LAST_IWMMXT_REGNUM))
1202 #define IS_IWMMXT_GR_REGNUM(REGNUM) \
1203 (((REGNUM) >= FIRST_IWMMXT_GR_REGNUM) && ((REGNUM) <= LAST_IWMMXT_GR_REGNUM))
1205 /* Base register for access to local variables of the function. */
1206 #define FRAME_POINTER_REGNUM 25
1208 /* Base register for access to arguments of the function. */
1209 #define ARG_POINTER_REGNUM 26
1211 #define FIRST_CIRRUS_FP_REGNUM 27
1212 #define LAST_CIRRUS_FP_REGNUM 42
1213 #define IS_CIRRUS_REGNUM(REGNUM) \
1214 (((REGNUM) >= FIRST_CIRRUS_FP_REGNUM) && ((REGNUM) <= LAST_CIRRUS_FP_REGNUM))
1216 #define FIRST_VFP_REGNUM 63
1217 #define LAST_VFP_REGNUM 94
1218 #define IS_VFP_REGNUM(REGNUM) \
1219 (((REGNUM) >= FIRST_VFP_REGNUM) && ((REGNUM) <= LAST_VFP_REGNUM))
1221 /* The number of hard registers is 16 ARM + 8 FPA + 1 CC + 1 SFP + 1 AFP. */
1222 /* + 16 Cirrus registers take us up to 43. */
1223 /* Intel Wireless MMX Technology registers add 16 + 4 more. */
1224 /* VFP adds 32 + 1 more. */
1225 #define FIRST_PSEUDO_REGISTER 96
1227 /* Value should be nonzero if functions must have frame pointers.
1228 Zero means the frame pointer need not be set up (and parms may be accessed
1229 via the stack pointer) in functions that seem suitable.
1230 If we have to have a frame pointer we might as well make use of it.
1231 APCS says that the frame pointer does not need to be pushed in leaf
1232 functions, or simple tail call functions. */
1233 #define FRAME_POINTER_REQUIRED \
1234 (current_function_has_nonlocal_label \
1235 || (TARGET_ARM && TARGET_APCS_FRAME && ! leaf_function_p ()))
1237 /* Return number of consecutive hard regs needed starting at reg REGNO
1238 to hold something of mode MODE.
1239 This is ordinarily the length in words of a value of mode MODE
1240 but can be less for certain modes in special long registers.
1242 On the ARM regs are UNITS_PER_WORD bits wide; FPA regs can hold any FP
1244 #define HARD_REGNO_NREGS(REGNO, MODE) \
1246 && REGNO >= FIRST_FPA_REGNUM \
1247 && REGNO != FRAME_POINTER_REGNUM \
1248 && REGNO != ARG_POINTER_REGNUM) \
1249 && !IS_VFP_REGNUM (REGNO) \
1250 ? 1 : ARM_NUM_REGS (MODE))
1252 /* Return true if REGNO is suitable for holding a quantity of type MODE. */
1253 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
1254 arm_hard_regno_mode_ok ((REGNO), (MODE))
1256 /* Value is 1 if it is a good idea to tie two pseudo registers
1257 when one has mode MODE1 and one has mode MODE2.
1258 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
1259 for any hard reg, then this must be 0 for correct output. */
1260 #define MODES_TIEABLE_P(MODE1, MODE2) \
1261 (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
1263 #define VECTOR_MODE_SUPPORTED_P(MODE) \
1264 ((MODE) == V2SImode || (MODE) == V4HImode || (MODE) == V8QImode)
1266 #define VALID_IWMMXT_REG_MODE(MODE) \
1267 (VECTOR_MODE_SUPPORTED_P (MODE) || (MODE) == DImode)
1269 /* The order in which register should be allocated. It is good to use ip
1270 since no saving is required (though calls clobber it) and it never contains
1271 function parameters. It is quite good to use lr since other calls may
1272 clobber it anyway. Allocate r0 through r3 in reverse order since r3 is
1273 least likely to contain a function parameter; in addition results are
1276 #define REG_ALLOC_ORDER \
1278 3, 2, 1, 0, 12, 14, 4, 5, \
1279 6, 7, 8, 10, 9, 11, 13, 15, \
1280 16, 17, 18, 19, 20, 21, 22, 23, \
1281 27, 28, 29, 30, 31, 32, 33, 34, \
1282 35, 36, 37, 38, 39, 40, 41, 42, \
1283 43, 44, 45, 46, 47, 48, 49, 50, \
1284 51, 52, 53, 54, 55, 56, 57, 58, \
1287 78, 77, 76, 75, 74, 73, 72, 71, \
1288 70, 69, 68, 67, 66, 65, 64, 63, \
1289 79, 80, 81, 82, 83, 84, 85, 86, \
1290 87, 88, 89, 90, 91, 92, 93, 94, \
1294 /* Interrupt functions can only use registers that have already been
1295 saved by the prologue, even if they would normally be
1297 #define HARD_REGNO_RENAME_OK(SRC, DST) \
1298 (! IS_INTERRUPT (cfun->machine->func_type) || \
1299 regs_ever_live[DST])
1301 /* Register and constant classes. */
1303 /* Register classes: used to be simple, just all ARM regs or all FPA regs
1304 Now that the Thumb is involved it has become more complicated. */
1324 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1326 /* Give names of register classes as strings for dump file. */
1327 #define REG_CLASS_NAMES \
1345 /* Define which registers fit in which classes.
1346 This is an initializer for a vector of HARD_REG_SET
1347 of length N_REG_CLASSES. */
1348 #define REG_CLASS_CONTENTS \
1350 { 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
1351 { 0x00FF0000, 0x00000000, 0x00000000 }, /* FPA_REGS */ \
1352 { 0xF8000000, 0x000007FF, 0x00000000 }, /* CIRRUS_REGS */ \
1353 { 0x00000000, 0x80000000, 0x7FFFFFFF }, /* VFP_REGS */ \
1354 { 0x00000000, 0x00007800, 0x00000000 }, /* IWMMXT_GR_REGS */ \
1355 { 0x00000000, 0x7FFF8000, 0x00000000 }, /* IWMMXT_REGS */ \
1356 { 0x000000FF, 0x00000000, 0x00000000 }, /* LO_REGS */ \
1357 { 0x00002000, 0x00000000, 0x00000000 }, /* STACK_REG */ \
1358 { 0x000020FF, 0x00000000, 0x00000000 }, /* BASE_REGS */ \
1359 { 0x0000FF00, 0x00000000, 0x00000000 }, /* HI_REGS */ \
1360 { 0x01000000, 0x00000000, 0x00000000 }, /* CC_REG */ \
1361 { 0x00000000, 0x00000000, 0x80000000 }, /* VFPCC_REG */ \
1362 { 0x0200FFFF, 0x00000000, 0x00000000 }, /* GENERAL_REGS */ \
1363 { 0xFAFFFFFF, 0xFFFFFFFF, 0x7FFFFFFF } /* ALL_REGS */ \
1366 /* The same information, inverted:
1367 Return the class number of the smallest class containing
1368 reg number REGNO. This could be a conditional expression
1369 or could index an array. */
1370 #define REGNO_REG_CLASS(REGNO) arm_regno_class (REGNO)
1372 /* FPA registers can't do subreg as all values are reformatted to internal
1373 precision. VFP registers may only be accessed in the mode they
1375 #define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
1376 (GET_MODE_SIZE (FROM) != GET_MODE_SIZE (TO) \
1377 ? reg_classes_intersect_p (FPA_REGS, (CLASS)) \
1378 || reg_classes_intersect_p (VFP_REGS, (CLASS)) \
1381 /* The class value for index registers, and the one for base regs. */
1382 #define INDEX_REG_CLASS (TARGET_THUMB ? LO_REGS : GENERAL_REGS)
1383 #define BASE_REG_CLASS (TARGET_THUMB ? LO_REGS : GENERAL_REGS)
1385 /* For the Thumb the high registers cannot be used as base registers
1386 when addressing quantities in QI or HI mode; if we don't know the
1387 mode, then we must be conservative. After reload we must also be
1388 conservative, since we can't support SP+reg addressing, and we
1389 can't fix up any bad substitutions. */
1390 #define MODE_BASE_REG_CLASS(MODE) \
1391 (TARGET_ARM ? GENERAL_REGS : \
1392 (((MODE) == SImode && !reload_completed) ? BASE_REGS : LO_REGS))
1394 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1395 registers explicitly used in the rtl to be used as spill registers
1396 but prevents the compiler from extending the lifetime of these
1398 #define SMALL_REGISTER_CLASSES TARGET_THUMB
1400 /* Get reg_class from a letter such as appears in the machine description.
1401 We only need constraint `f' for FPA_REGS (`r' == GENERAL_REGS) for the
1402 ARM, but several more letters for the Thumb. */
1403 #define REG_CLASS_FROM_LETTER(C) \
1404 ( (C) == 'f' ? FPA_REGS \
1405 : (C) == 'v' ? CIRRUS_REGS \
1406 : (C) == 'w' ? VFP_REGS \
1407 : (C) == 'y' ? IWMMXT_REGS \
1408 : (C) == 'z' ? IWMMXT_GR_REGS \
1409 : (C) == 'l' ? (TARGET_ARM ? GENERAL_REGS : LO_REGS) \
1410 : TARGET_ARM ? NO_REGS \
1411 : (C) == 'h' ? HI_REGS \
1412 : (C) == 'b' ? BASE_REGS \
1413 : (C) == 'k' ? STACK_REG \
1414 : (C) == 'c' ? CC_REG \
1417 /* The letters I, J, K, L and M in a register constraint string
1418 can be used to stand for particular ranges of immediate operands.
1419 This macro defines what the ranges are.
1420 C is the letter, and VALUE is a constant value.
1421 Return 1 if VALUE is in the range specified by C.
1422 I: immediate arithmetic operand (i.e. 8 bits shifted as required).
1423 J: valid indexing constants.
1424 K: ~value ok in rhs argument of data operand.
1425 L: -value ok in rhs argument of data operand.
1426 M: 0..32, or a power of 2 (for shifts, or mult done by shift). */
1427 #define CONST_OK_FOR_ARM_LETTER(VALUE, C) \
1428 ((C) == 'I' ? const_ok_for_arm (VALUE) : \
1429 (C) == 'J' ? ((VALUE) < 4096 && (VALUE) > -4096) : \
1430 (C) == 'K' ? (const_ok_for_arm (~(VALUE))) : \
1431 (C) == 'L' ? (const_ok_for_arm (-(VALUE))) : \
1432 (C) == 'M' ? (((VALUE >= 0 && VALUE <= 32)) \
1433 || (((VALUE) & ((VALUE) - 1)) == 0)) \
1436 #define CONST_OK_FOR_THUMB_LETTER(VAL, C) \
1437 ((C) == 'I' ? (unsigned HOST_WIDE_INT) (VAL) < 256 : \
1438 (C) == 'J' ? (VAL) > -256 && (VAL) < 0 : \
1439 (C) == 'K' ? thumb_shiftable_const (VAL) : \
1440 (C) == 'L' ? (VAL) > -8 && (VAL) < 8 : \
1441 (C) == 'M' ? ((unsigned HOST_WIDE_INT) (VAL) < 1024 \
1442 && ((VAL) & 3) == 0) : \
1443 (C) == 'N' ? ((unsigned HOST_WIDE_INT) (VAL) < 32) : \
1444 (C) == 'O' ? ((VAL) >= -508 && (VAL) <= 508) \
1447 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1449 CONST_OK_FOR_ARM_LETTER (VALUE, C) : CONST_OK_FOR_THUMB_LETTER (VALUE, C))
1451 /* Constant letter 'G' for the FP immediate constants.
1452 'H' means the same constant negated. */
1453 #define CONST_DOUBLE_OK_FOR_ARM_LETTER(X, C) \
1454 ((C) == 'G' ? arm_const_double_rtx (X) : \
1455 (C) == 'H' ? neg_const_double_rtx_ok_for_fpa (X) : 0)
1457 #define CONST_DOUBLE_OK_FOR_LETTER_P(X, C) \
1459 CONST_DOUBLE_OK_FOR_ARM_LETTER (X, C) : 0)
1461 /* For the ARM, `Q' means that this is a memory operand that is just
1462 an offset from a register.
1463 `S' means any symbol that has the SYMBOL_REF_FLAG set or a CONSTANT_POOL
1464 address. This means that the symbol is in the text segment and can be
1465 accessed without using a load.
1466 'U' Prefixes an extended memory constraint where:
1467 'Uv' is an address valid for VFP load/store insns.
1468 'Uq' is an address valid for ldrsb. */
1470 #define EXTRA_CONSTRAINT_STR_ARM(OP, C, STR) \
1471 (((C) == 'Q') ? (GET_CODE (OP) == MEM \
1472 && GET_CODE (XEXP (OP, 0)) == REG) : \
1473 ((C) == 'R') ? (GET_CODE (OP) == MEM \
1474 && GET_CODE (XEXP (OP, 0)) == SYMBOL_REF \
1475 && CONSTANT_POOL_ADDRESS_P (XEXP (OP, 0))) : \
1476 ((C) == 'S') ? (optimize > 0 && CONSTANT_ADDRESS_P (OP)) : \
1477 ((C) == 'T') ? cirrus_memory_offset (OP) : \
1478 ((C) == 'U' && (STR)[1] == 'v') ? vfp_mem_operand (OP) : \
1479 ((C) == 'U' && (STR)[1] == 'q') \
1480 ? arm_extendqisi_mem_op (OP, GET_MODE (OP)) \
1483 #define CONSTRAINT_LEN(C,STR) \
1484 ((C) == 'U' ? 2 : DEFAULT_CONSTRAINT_LEN (C, STR))
1486 #define EXTRA_CONSTRAINT_THUMB(X, C) \
1487 ((C) == 'Q' ? (GET_CODE (X) == MEM \
1488 && GET_CODE (XEXP (X, 0)) == LABEL_REF) : 0)
1490 #define EXTRA_CONSTRAINT_STR(X, C, STR) \
1492 ? EXTRA_CONSTRAINT_STR_ARM (X, C, STR) \
1493 : EXTRA_CONSTRAINT_THUMB (X, C))
1495 #define EXTRA_MEMORY_CONSTRAINT(C, STR) ((C) == 'U')
1497 /* Given an rtx X being reloaded into a reg required to be
1498 in class CLASS, return the class of reg to actually use.
1499 In general this is just CLASS, but for the Thumb we prefer
1500 a LO_REGS class or a subset. */
1501 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1502 (TARGET_ARM ? (CLASS) : \
1503 ((CLASS) == BASE_REGS ? (CLASS) : LO_REGS))
1505 /* Must leave BASE_REGS reloads alone */
1506 #define THUMB_SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1507 ((CLASS) != LO_REGS && (CLASS) != BASE_REGS \
1508 ? ((true_regnum (X) == -1 ? LO_REGS \
1509 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1513 #define THUMB_SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1514 ((CLASS) != LO_REGS \
1515 ? ((true_regnum (X) == -1 ? LO_REGS \
1516 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1520 /* Return the register class of a scratch register needed to copy IN into
1521 or out of a register in CLASS in MODE. If it can be done directly,
1522 NO_REGS is returned. */
1523 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1524 /* Restrict which direct reloads are allowed for VFP regs. */ \
1525 ((TARGET_VFP && TARGET_HARD_FLOAT \
1526 && (CLASS) == VFP_REGS) \
1527 ? vfp_secondary_reload_class (MODE, X) \
1529 ? (((MODE) == HImode && ! arm_arch4 && true_regnum (X) == -1) \
1530 ? GENERAL_REGS : NO_REGS) \
1531 : THUMB_SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X))
1533 /* If we need to load shorts byte-at-a-time, then we need a scratch. */
1534 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1535 /* Restrict which direct reloads are allowed for VFP regs. */ \
1536 ((TARGET_VFP && TARGET_HARD_FLOAT \
1537 && (CLASS) == VFP_REGS) \
1538 ? vfp_secondary_reload_class (MODE, X) : \
1539 /* Cannot load constants into Cirrus registers. */ \
1540 (TARGET_MAVERICK && TARGET_HARD_FLOAT \
1541 && (CLASS) == CIRRUS_REGS \
1542 && (CONSTANT_P (X) || GET_CODE (X) == SYMBOL_REF)) \
1545 (((CLASS) == IWMMXT_REGS || (CLASS) == IWMMXT_GR_REGS) \
1546 && CONSTANT_P (X)) \
1548 (((MODE) == HImode && ! arm_arch4 && TARGET_MMU_TRAPS \
1549 && (GET_CODE (X) == MEM \
1550 || ((GET_CODE (X) == REG || GET_CODE (X) == SUBREG) \
1551 && true_regnum (X) == -1))) \
1552 ? GENERAL_REGS : NO_REGS) \
1553 : THUMB_SECONDARY_INPUT_RELOAD_CLASS (CLASS, MODE, X)))
1555 /* Try a machine-dependent way of reloading an illegitimate address
1556 operand. If we find one, push the reload and jump to WIN. This
1557 macro is used in only one place: `find_reloads_address' in reload.c.
1559 For the ARM, we wish to handle large displacements off a base
1560 register by splitting the addend across a MOV and the mem insn.
1561 This can cut the number of reloads needed. */
1562 #define ARM_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND, WIN) \
1565 if (GET_CODE (X) == PLUS \
1566 && GET_CODE (XEXP (X, 0)) == REG \
1567 && REGNO (XEXP (X, 0)) < FIRST_PSEUDO_REGISTER \
1568 && REG_MODE_OK_FOR_BASE_P (XEXP (X, 0), MODE) \
1569 && GET_CODE (XEXP (X, 1)) == CONST_INT) \
1571 HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
1572 HOST_WIDE_INT low, high; \
1574 if (MODE == DImode || (TARGET_SOFT_FLOAT && TARGET_FPA \
1575 && MODE == DFmode)) \
1576 low = ((val & 0xf) ^ 0x8) - 0x8; \
1577 else if (TARGET_MAVERICK && TARGET_HARD_FLOAT) \
1578 /* Need to be careful, -256 is not a valid offset. */ \
1579 low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \
1580 else if (MODE == SImode \
1581 || (MODE == SFmode && TARGET_SOFT_FLOAT && TARGET_FPA) \
1582 || ((MODE == HImode || MODE == QImode) && ! arm_arch4)) \
1583 /* Need to be careful, -4096 is not a valid offset. */ \
1584 low = val >= 0 ? (val & 0xfff) : -((-val) & 0xfff); \
1585 else if ((MODE == HImode || MODE == QImode) && arm_arch4) \
1586 /* Need to be careful, -256 is not a valid offset. */ \
1587 low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \
1588 else if (GET_MODE_CLASS (MODE) == MODE_FLOAT \
1589 && TARGET_HARD_FLOAT && TARGET_FPA) \
1590 /* Need to be careful, -1024 is not a valid offset. */ \
1591 low = val >= 0 ? (val & 0x3ff) : -((-val) & 0x3ff); \
1595 high = ((((val - low) & (unsigned HOST_WIDE_INT) 0xffffffff) \
1596 ^ (unsigned HOST_WIDE_INT) 0x80000000) \
1597 - (unsigned HOST_WIDE_INT) 0x80000000); \
1598 /* Check for overflow or zero */ \
1599 if (low == 0 || high == 0 || (high + low != val)) \
1602 /* Reload the high part into a base reg; leave the low part \
1604 X = gen_rtx_PLUS (GET_MODE (X), \
1605 gen_rtx_PLUS (GET_MODE (X), XEXP (X, 0), \
1608 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1609 MODE_BASE_REG_CLASS (MODE), GET_MODE (X), \
1610 VOIDmode, 0, 0, OPNUM, TYPE); \
1616 /* XXX If an HImode FP+large_offset address is converted to an HImode
1617 SP+large_offset address, then reload won't know how to fix it. It sees
1618 only that SP isn't valid for HImode, and so reloads the SP into an index
1619 register, but the resulting address is still invalid because the offset
1620 is too big. We fix it here instead by reloading the entire address. */
1621 /* We could probably achieve better results by defining PROMOTE_MODE to help
1622 cope with the variances between the Thumb's signed and unsigned byte and
1623 halfword load instructions. */
1624 #define THUMB_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1626 if (GET_CODE (X) == PLUS \
1627 && GET_MODE_SIZE (MODE) < 4 \
1628 && GET_CODE (XEXP (X, 0)) == REG \
1629 && XEXP (X, 0) == stack_pointer_rtx \
1630 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1631 && ! thumb_legitimate_offset_p (MODE, INTVAL (XEXP (X, 1)))) \
1635 push_reload (orig_X, NULL_RTX, &X, NULL, \
1636 MODE_BASE_REG_CLASS (MODE), \
1637 Pmode, VOIDmode, 0, 0, OPNUM, TYPE); \
1642 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1644 ARM_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN); \
1646 THUMB_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)
1648 /* Return the maximum number of consecutive registers
1649 needed to represent mode MODE in a register of class CLASS.
1650 ARM regs are UNITS_PER_WORD bits while FPA regs can hold any FP mode */
1651 #define CLASS_MAX_NREGS(CLASS, MODE) \
1652 (((CLASS) == FPA_REGS || (CLASS) == CIRRUS_REGS) ? 1 : ARM_NUM_REGS (MODE))
1654 /* If defined, gives a class of registers that cannot be used as the
1655 operand of a SUBREG that changes the mode of the object illegally. */
1657 /* Moves between FPA_REGS and GENERAL_REGS are two memory insns. */
1658 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
1660 ((FROM) == FPA_REGS && (TO) != FPA_REGS ? 20 : \
1661 (FROM) != FPA_REGS && (TO) == FPA_REGS ? 20 : \
1662 (FROM) == VFP_REGS && (TO) != VFP_REGS ? 10 : \
1663 (FROM) != VFP_REGS && (TO) == VFP_REGS ? 10 : \
1664 (FROM) == IWMMXT_REGS && (TO) != IWMMXT_REGS ? 4 : \
1665 (FROM) != IWMMXT_REGS && (TO) == IWMMXT_REGS ? 4 : \
1666 (FROM) == IWMMXT_GR_REGS || (TO) == IWMMXT_GR_REGS ? 20 : \
1667 (FROM) == CIRRUS_REGS && (TO) != CIRRUS_REGS ? 20 : \
1668 (FROM) != CIRRUS_REGS && (TO) == CIRRUS_REGS ? 20 : \
1671 ((FROM) == HI_REGS || (TO) == HI_REGS) ? 4 : 2)
1673 /* Stack layout; function entry, exit and calling. */
1675 /* Define this if pushing a word on the stack
1676 makes the stack pointer a smaller address. */
1677 #define STACK_GROWS_DOWNWARD 1
1679 /* Define this if the nominal address of the stack frame
1680 is at the high-address end of the local variables;
1681 that is, each additional local variable allocated
1682 goes at a more negative offset in the frame. */
1683 #define FRAME_GROWS_DOWNWARD 1
1685 /* Offset within stack frame to start allocating local variables at.
1686 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1687 first local allocated. Otherwise, it is the offset to the BEGINNING
1688 of the first local allocated. */
1689 #define STARTING_FRAME_OFFSET 0
1691 /* If we generate an insn to push BYTES bytes,
1692 this says how many the stack pointer really advances by. */
1693 /* The push insns do not do this rounding implicitly.
1694 So don't define this. */
1695 /* #define PUSH_ROUNDING(NPUSHED) ROUND_UP_WORD (NPUSHED) */
1697 /* Define this if the maximum size of all the outgoing args is to be
1698 accumulated and pushed during the prologue. The amount can be
1699 found in the variable current_function_outgoing_args_size. */
1700 #define ACCUMULATE_OUTGOING_ARGS 1
1702 /* Offset of first parameter from the argument pointer register value. */
1703 #define FIRST_PARM_OFFSET(FNDECL) (TARGET_ARM ? 4 : 0)
1705 /* Value is the number of byte of arguments automatically
1706 popped when returning from a subroutine call.
1707 FUNDECL is the declaration node of the function (as a tree),
1708 FUNTYPE is the data type of the function (as a tree),
1709 or for a library call it is an identifier node for the subroutine name.
1710 SIZE is the number of bytes of arguments passed on the stack.
1712 On the ARM, the caller does not pop any of its arguments that were passed
1714 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0
1716 /* Define how to find the value returned by a library function
1717 assuming the value has mode MODE. */
1718 #define LIBCALL_VALUE(MODE) \
1719 (TARGET_ARM && TARGET_HARD_FLOAT && TARGET_FPA \
1720 && GET_MODE_CLASS (MODE) == MODE_FLOAT \
1721 ? gen_rtx_REG (MODE, FIRST_FPA_REGNUM) \
1722 : TARGET_ARM && TARGET_HARD_FLOAT && TARGET_MAVERICK \
1723 && GET_MODE_CLASS (MODE) == MODE_FLOAT \
1724 ? gen_rtx_REG (MODE, FIRST_CIRRUS_FP_REGNUM) \
1725 : TARGET_IWMMXT_ABI && VECTOR_MODE_SUPPORTED_P (MODE) \
1726 ? gen_rtx_REG (MODE, FIRST_IWMMXT_REGNUM) \
1727 : gen_rtx_REG (MODE, ARG_REGISTER (1)))
1729 /* Define how to find the value returned by a function.
1730 VALTYPE is the data type of the value (as a tree).
1731 If the precise function being called is known, FUNC is its FUNCTION_DECL;
1732 otherwise, FUNC is 0. */
1733 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1734 arm_function_value (VALTYPE, FUNC);
1736 /* 1 if N is a possible register number for a function value.
1737 On the ARM, only r0 and f0 can return results. */
1738 /* On a Cirrus chip, mvf0 can return results. */
1739 #define FUNCTION_VALUE_REGNO_P(REGNO) \
1740 ((REGNO) == ARG_REGISTER (1) \
1741 || (TARGET_ARM && ((REGNO) == FIRST_CIRRUS_FP_REGNUM) \
1742 && TARGET_HARD_FLOAT && TARGET_MAVERICK) \
1743 || ((REGNO) == FIRST_IWMMXT_REGNUM && TARGET_IWMMXT_ABI) \
1744 || (TARGET_ARM && ((REGNO) == FIRST_FPA_REGNUM) \
1745 && TARGET_HARD_FLOAT && TARGET_FPA))
1747 /* How large values are returned */
1748 /* A C expression which can inhibit the returning of certain function values
1749 in registers, based on the type of value. */
1750 #define RETURN_IN_MEMORY(TYPE) arm_return_in_memory (TYPE)
1752 /* Define DEFAULT_PCC_STRUCT_RETURN to 1 if all structure and union return
1753 values must be in memory. On the ARM, they need only do so if larger
1754 than a word, or if they contain elements offset from zero in the struct. */
1755 #define DEFAULT_PCC_STRUCT_RETURN 0
1757 /* Flags for the call/call_value rtl operations set up by function_arg. */
1758 #define CALL_NORMAL 0x00000000 /* No special processing. */
1759 #define CALL_LONG 0x00000001 /* Always call indirect. */
1760 #define CALL_SHORT 0x00000002 /* Never call indirect. */
1762 /* These bits describe the different types of function supported
1763 by the ARM backend. They are exclusive. ie a function cannot be both a
1764 normal function and an interworked function, for example. Knowing the
1765 type of a function is important for determining its prologue and
1767 Note value 7 is currently unassigned. Also note that the interrupt
1768 function types all have bit 2 set, so that they can be tested for easily.
1769 Note that 0 is deliberately chosen for ARM_FT_UNKNOWN so that when the
1770 machine_function structure is initialized (to zero) func_type will
1771 default to unknown. This will force the first use of arm_current_func_type
1772 to call arm_compute_func_type. */
1773 #define ARM_FT_UNKNOWN 0 /* Type has not yet been determined. */
1774 #define ARM_FT_NORMAL 1 /* Your normal, straightforward function. */
1775 #define ARM_FT_INTERWORKED 2 /* A function that supports interworking. */
1776 #define ARM_FT_EXCEPTION_HANDLER 3 /* A C++ exception handler. */
1777 #define ARM_FT_ISR 4 /* An interrupt service routine. */
1778 #define ARM_FT_FIQ 5 /* A fast interrupt service routine. */
1779 #define ARM_FT_EXCEPTION 6 /* An ARM exception handler (subcase of ISR). */
1781 #define ARM_FT_TYPE_MASK ((1 << 3) - 1)
1783 /* In addition functions can have several type modifiers,
1784 outlined by these bit masks: */
1785 #define ARM_FT_INTERRUPT (1 << 2) /* Note overlap with FT_ISR and above. */
1786 #define ARM_FT_NAKED (1 << 3) /* No prologue or epilogue. */
1787 #define ARM_FT_VOLATILE (1 << 4) /* Does not return. */
1788 #define ARM_FT_NESTED (1 << 5) /* Embedded inside another func. */
1790 /* Some macros to test these flags. */
1791 #define ARM_FUNC_TYPE(t) (t & ARM_FT_TYPE_MASK)
1792 #define IS_INTERRUPT(t) (t & ARM_FT_INTERRUPT)
1793 #define IS_VOLATILE(t) (t & ARM_FT_VOLATILE)
1794 #define IS_NAKED(t) (t & ARM_FT_NAKED)
1795 #define IS_NESTED(t) (t & ARM_FT_NESTED)
1798 /* Structure used to hold the function stack frame layout. Offsets are
1799 relative to the stack pointer on function entry. Positive offsets are
1800 in the direction of stack growth.
1801 Only soft_frame is used in thumb mode. */
1803 typedef struct arm_stack_offsets GTY(())
1805 int saved_args; /* ARG_POINTER_REGNUM. */
1806 int frame; /* ARM_HARD_FRAME_POINTER_REGNUM. */
1808 int soft_frame; /* FRAME_POINTER_REGNUM. */
1809 int outgoing_args; /* STACK_POINTER_REGNUM. */
1813 /* A C structure for machine-specific, per-function data.
1814 This is added to the cfun structure. */
1815 typedef struct machine_function GTY(())
1817 /* Additional stack adjustment in __builtin_eh_throw. */
1818 rtx eh_epilogue_sp_ofs;
1819 /* Records if LR has to be saved for far jumps. */
1821 /* Records if ARG_POINTER was ever live. */
1822 int arg_pointer_live;
1823 /* Records if the save of LR has been eliminated. */
1824 int lr_save_eliminated;
1825 /* The size of the stack frame. Only valid after reload. */
1826 arm_stack_offsets stack_offsets;
1827 /* Records the type of the current function. */
1828 unsigned long func_type;
1829 /* Record if the function has a variable argument list. */
1830 int uses_anonymous_args;
1831 /* Records if sibcalls are blocked because an argument
1832 register is needed to preserve stack alignment. */
1833 int sibcall_blocked;
1837 /* A C type for declaring a variable that is used as the first argument of
1838 `FUNCTION_ARG' and other related values. For some target machines, the
1839 type `int' suffices and can hold the number of bytes of argument so far. */
1842 /* This is the number of registers of arguments scanned so far. */
1844 /* This is the number of iWMMXt register arguments scanned so far. */
1848 /* One of CALL_NORMAL, CALL_LONG or CALL_SHORT. */
1853 /* Define where to put the arguments to a function.
1854 Value is zero to push the argument on the stack,
1855 or a hard register in which to store the argument.
1857 MODE is the argument's machine mode.
1858 TYPE is the data type of the argument (as a tree).
1859 This is null for libcalls where that information may
1861 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1862 the preceding args and about the function being called.
1863 NAMED is nonzero if this argument is a named parameter
1864 (otherwise it is an extra parameter matching an ellipsis).
1866 On the ARM, normally the first 16 bytes are passed in registers r0-r3; all
1867 other arguments are passed on the stack. If (NAMED == 0) (which happens
1868 only in assign_parms, since TARGET_SETUP_INCOMING_VARARGS is
1869 defined), say it is passed in the stack (function_prologue will
1870 indeed make it pass in the stack if necessary). */
1871 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1872 arm_function_arg (&(CUM), (MODE), (TYPE), (NAMED))
1874 /* For an arg passed partly in registers and partly in memory,
1875 this is the number of registers used.
1876 For args passed entirely in registers or entirely in memory, zero. */
1877 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1878 (VECTOR_MODE_SUPPORTED_P (MODE) ? 0 : \
1879 NUM_ARG_REGS > (CUM).nregs \
1880 && (NUM_ARG_REGS < ((CUM).nregs + ARM_NUM_REGS2 (MODE, TYPE)) \
1881 && (CUM).can_split) \
1882 ? NUM_ARG_REGS - (CUM).nregs : 0)
1884 /* A C expression that indicates when an argument must be passed by
1885 reference. If nonzero for an argument, a copy of that argument is
1886 made in memory and a pointer to the argument is passed instead of
1887 the argument itself. The pointer is passed in whatever way is
1888 appropriate for passing a pointer to that type. */
1889 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
1890 arm_function_arg_pass_by_reference (&CUM, MODE, TYPE, NAMED)
1892 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1893 for a call to a function whose data type is FNTYPE.
1894 For a library call, FNTYPE is 0.
1895 On the ARM, the offset starts at 0. */
1896 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
1897 arm_init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (FNDECL))
1899 /* Update the data in CUM to advance over an argument
1900 of mode MODE and data type TYPE.
1901 (TYPE is null for libcalls where that information may not be available.) */
1902 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1904 if (VECTOR_MODE_SUPPORTED_P (MODE) \
1905 && (CUM).named_count > (CUM).nargs) \
1906 (CUM).iwmmxt_nregs += 1; \
1908 (CUM).nregs += ARM_NUM_REGS2 (MODE, TYPE)
1910 /* If defined, a C expression that gives the alignment boundary, in bits, of an
1911 argument with the specified mode and type. If it is not defined,
1912 `PARM_BOUNDARY' is used for all arguments. */
1913 #define FUNCTION_ARG_BOUNDARY(MODE,TYPE) \
1914 ((ARM_DOUBLEWORD_ALIGN && arm_needs_doubleword_align (MODE, TYPE)) \
1915 ? DOUBLEWORD_ALIGNMENT \
1918 /* 1 if N is a possible register number for function argument passing.
1919 On the ARM, r0-r3 are used to pass args. */
1920 #define FUNCTION_ARG_REGNO_P(REGNO) \
1921 (IN_RANGE ((REGNO), 0, 3) \
1922 || (TARGET_IWMMXT_ABI \
1923 && IN_RANGE ((REGNO), FIRST_IWMMXT_REGNUM, FIRST_IWMMXT_REGNUM + 9)))
1925 /* Implement `va_arg'. */
1926 #define EXPAND_BUILTIN_VA_ARG(valist, type) \
1927 arm_va_arg (valist, type)
1930 /* If your target environment doesn't prefix user functions with an
1931 underscore, you may wish to re-define this to prevent any conflicts.
1932 e.g. AOF may prefix mcount with an underscore. */
1933 #ifndef ARM_MCOUNT_NAME
1934 #define ARM_MCOUNT_NAME "*mcount"
1937 /* Call the function profiler with a given profile label. The Acorn
1938 compiler puts this BEFORE the prolog but gcc puts it afterwards.
1939 On the ARM the full profile code will look like:
1948 profile_function() in final.c outputs the .data section, FUNCTION_PROFILER
1949 will output the .text section.
1951 The ``mov ip,lr'' seems like a good idea to stick with cc convention.
1952 ``prof'' doesn't seem to mind about this!
1954 Note - this version of the code is designed to work in both ARM and
1956 #ifndef ARM_FUNCTION_PROFILER
1957 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
1962 asm_fprintf (STREAM, "\tmov\t%r, %r\n\tbl\t", \
1963 IP_REGNUM, LR_REGNUM); \
1964 assemble_name (STREAM, ARM_MCOUNT_NAME); \
1965 fputc ('\n', STREAM); \
1966 ASM_GENERATE_INTERNAL_LABEL (temp, "LP", LABELNO); \
1967 sym = gen_rtx_SYMBOL_REF (Pmode, temp); \
1968 assemble_aligned_integer (UNITS_PER_WORD, sym); \
1972 #ifdef THUMB_FUNCTION_PROFILER
1973 #define FUNCTION_PROFILER(STREAM, LABELNO) \
1975 ARM_FUNCTION_PROFILER (STREAM, LABELNO) \
1977 THUMB_FUNCTION_PROFILER (STREAM, LABELNO)
1979 #define FUNCTION_PROFILER(STREAM, LABELNO) \
1980 ARM_FUNCTION_PROFILER (STREAM, LABELNO)
1983 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1984 the stack pointer does not matter. The value is tested only in
1985 functions that have frame pointers.
1986 No definition is equivalent to always zero.
1988 On the ARM, the function epilogue recovers the stack pointer from the
1990 #define EXIT_IGNORE_STACK 1
1992 #define EPILOGUE_USES(REGNO) (reload_completed && (REGNO) == LR_REGNUM)
1994 /* Determine if the epilogue should be output as RTL.
1995 You should override this if you define FUNCTION_EXTRA_EPILOGUE. */
1996 #define USE_RETURN_INSN(ISCOND) \
1997 (TARGET_ARM ? use_return_insn (ISCOND, NULL) : 0)
1999 /* Definitions for register eliminations.
2001 This is an array of structures. Each structure initializes one pair
2002 of eliminable registers. The "from" register number is given first,
2003 followed by "to". Eliminations of the same "from" register are listed
2004 in order of preference.
2006 We have two registers that can be eliminated on the ARM. First, the
2007 arg pointer register can often be eliminated in favor of the stack
2008 pointer register. Secondly, the pseudo frame pointer register can always
2009 be eliminated; it is replaced with either the stack or the real frame
2010 pointer. Note we have to use {ARM|THUMB}_HARD_FRAME_POINTER_REGNUM
2011 because the definition of HARD_FRAME_POINTER_REGNUM is not a constant. */
2013 #define ELIMINABLE_REGS \
2014 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },\
2015 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM },\
2016 { ARG_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
2017 { ARG_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM },\
2018 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },\
2019 { FRAME_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
2020 { FRAME_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM }}
2022 /* Given FROM and TO register numbers, say whether this elimination is
2023 allowed. Frame pointer elimination is automatically handled.
2025 All eliminations are permissible. Note that ARG_POINTER_REGNUM and
2026 HARD_FRAME_POINTER_REGNUM are in fact the same thing. If we need a frame
2027 pointer, we must eliminate FRAME_POINTER_REGNUM into
2028 HARD_FRAME_POINTER_REGNUM and not into STACK_POINTER_REGNUM or
2029 ARG_POINTER_REGNUM. */
2030 #define CAN_ELIMINATE(FROM, TO) \
2031 (((TO) == FRAME_POINTER_REGNUM && (FROM) == ARG_POINTER_REGNUM) ? 0 : \
2032 ((TO) == STACK_POINTER_REGNUM && frame_pointer_needed) ? 0 : \
2033 ((TO) == ARM_HARD_FRAME_POINTER_REGNUM && TARGET_THUMB) ? 0 : \
2034 ((TO) == THUMB_HARD_FRAME_POINTER_REGNUM && TARGET_ARM) ? 0 : \
2037 #define THUMB_REG_PUSHED_P(reg) \
2038 (regs_ever_live [reg] \
2039 && (! call_used_regs [reg] \
2040 || (flag_pic && (reg) == PIC_OFFSET_TABLE_REGNUM)) \
2041 && !(TARGET_SINGLE_PIC_BASE && ((reg) == arm_pic_register)))
2043 /* Define the offset between two registers, one to be eliminated, and the
2044 other its replacement, at the start of a routine. */
2045 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
2047 (OFFSET) = arm_compute_initial_elimination_offset (FROM, TO); \
2049 (OFFSET) = thumb_compute_initial_elimination_offset (FROM, TO)
2051 /* Special case handling of the location of arguments passed on the stack. */
2052 #define DEBUGGER_ARG_OFFSET(value, addr) value ? value : arm_debugger_arg_offset (value, addr)
2054 /* Initialize data used by insn expanders. This is called from insn_emit,
2055 once for every function before code is generated. */
2056 #define INIT_EXPANDERS arm_init_expanders ()
2058 /* Output assembler code for a block containing the constant parts
2059 of a trampoline, leaving space for the variable parts.
2061 On the ARM, (if r8 is the static chain regnum, and remembering that
2062 referencing pc adds an offset of 8) the trampoline looks like:
2065 .word static chain value
2066 .word function's address
2067 XXX FIXME: When the trampoline returns, r8 will be clobbered. */
2068 #define ARM_TRAMPOLINE_TEMPLATE(FILE) \
2070 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
2071 STATIC_CHAIN_REGNUM, PC_REGNUM); \
2072 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
2073 PC_REGNUM, PC_REGNUM); \
2074 assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \
2075 assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \
2078 /* On the Thumb we always switch into ARM mode to execute the trampoline.
2079 Why - because it is easier. This code will always be branched to via
2080 a BX instruction and since the compiler magically generates the address
2081 of the function the linker has no opportunity to ensure that the
2082 bottom bit is set. Thus the processor will be in ARM mode when it
2083 reaches this code. So we duplicate the ARM trampoline code and add
2084 a switch into Thumb mode as well. */
2085 #define THUMB_TRAMPOLINE_TEMPLATE(FILE) \
2087 fprintf (FILE, "\t.code 32\n"); \
2088 fprintf (FILE, ".Ltrampoline_start:\n"); \
2089 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
2090 STATIC_CHAIN_REGNUM, PC_REGNUM); \
2091 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
2092 IP_REGNUM, PC_REGNUM); \
2093 asm_fprintf (FILE, "\torr\t%r, %r, #1\n", \
2094 IP_REGNUM, IP_REGNUM); \
2095 asm_fprintf (FILE, "\tbx\t%r\n", IP_REGNUM); \
2096 fprintf (FILE, "\t.word\t0\n"); \
2097 fprintf (FILE, "\t.word\t0\n"); \
2098 fprintf (FILE, "\t.code 16\n"); \
2101 #define TRAMPOLINE_TEMPLATE(FILE) \
2103 ARM_TRAMPOLINE_TEMPLATE (FILE) \
2105 THUMB_TRAMPOLINE_TEMPLATE (FILE)
2107 /* Length in units of the trampoline for entering a nested function. */
2108 #define TRAMPOLINE_SIZE (TARGET_ARM ? 16 : 24)
2110 /* Alignment required for a trampoline in bits. */
2111 #define TRAMPOLINE_ALIGNMENT 32
2113 /* Emit RTL insns to initialize the variable parts of a trampoline.
2114 FNADDR is an RTX for the address of the function's pure code.
2115 CXT is an RTX for the static chain value for the function. */
2116 #ifndef INITIALIZE_TRAMPOLINE
2117 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
2119 emit_move_insn (gen_rtx_MEM (SImode, \
2120 plus_constant (TRAMP, \
2121 TARGET_ARM ? 8 : 16)), \
2123 emit_move_insn (gen_rtx_MEM (SImode, \
2124 plus_constant (TRAMP, \
2125 TARGET_ARM ? 12 : 20)), \
2131 /* Addressing modes, and classification of registers for them. */
2132 #define HAVE_POST_INCREMENT 1
2133 #define HAVE_PRE_INCREMENT TARGET_ARM
2134 #define HAVE_POST_DECREMENT TARGET_ARM
2135 #define HAVE_PRE_DECREMENT TARGET_ARM
2136 #define HAVE_PRE_MODIFY_DISP TARGET_ARM
2137 #define HAVE_POST_MODIFY_DISP TARGET_ARM
2138 #define HAVE_PRE_MODIFY_REG TARGET_ARM
2139 #define HAVE_POST_MODIFY_REG TARGET_ARM
2141 /* Macros to check register numbers against specific register classes. */
2143 /* These assume that REGNO is a hard or pseudo reg number.
2144 They give nonzero only if REGNO is a hard reg of the suitable class
2145 or a pseudo reg currently allocated to a suitable hard reg.
2146 Since they use reg_renumber, they are safe only once reg_renumber
2147 has been allocated, which happens in local-alloc.c. */
2148 #define TEST_REGNO(R, TEST, VALUE) \
2149 ((R TEST VALUE) || ((unsigned) reg_renumber[R] TEST VALUE))
2151 /* On the ARM, don't allow the pc to be used. */
2152 #define ARM_REGNO_OK_FOR_BASE_P(REGNO) \
2153 (TEST_REGNO (REGNO, <, PC_REGNUM) \
2154 || TEST_REGNO (REGNO, ==, FRAME_POINTER_REGNUM) \
2155 || TEST_REGNO (REGNO, ==, ARG_POINTER_REGNUM))
2157 #define THUMB_REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2158 (TEST_REGNO (REGNO, <=, LAST_LO_REGNUM) \
2159 || (GET_MODE_SIZE (MODE) >= 4 \
2160 && TEST_REGNO (REGNO, ==, STACK_POINTER_REGNUM)))
2162 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
2164 ? THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE) \
2165 : ARM_REGNO_OK_FOR_BASE_P (REGNO))
2167 /* For ARM code, we don't care about the mode, but for Thumb, the index
2168 must be suitable for use in a QImode load. */
2169 #define REGNO_OK_FOR_INDEX_P(REGNO) \
2170 REGNO_MODE_OK_FOR_BASE_P (REGNO, QImode)
2172 /* Maximum number of registers that can appear in a valid memory address.
2173 Shifts in addresses can't be by a register. */
2174 #define MAX_REGS_PER_ADDRESS 2
2176 /* Recognize any constant value that is a valid address. */
2177 /* XXX We can address any constant, eventually... */
2179 #ifdef AOF_ASSEMBLER
2181 #define CONSTANT_ADDRESS_P(X) \
2182 (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X))
2186 #define CONSTANT_ADDRESS_P(X) \
2187 (GET_CODE (X) == SYMBOL_REF \
2188 && (CONSTANT_POOL_ADDRESS_P (X) \
2189 || (TARGET_ARM && optimize > 0 && SYMBOL_REF_FLAG (X))))
2191 #endif /* AOF_ASSEMBLER */
2193 /* Nonzero if the constant value X is a legitimate general operand.
2194 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
2196 On the ARM, allow any integer (invalid ones are removed later by insn
2197 patterns), nice doubles and symbol_refs which refer to the function's
2200 When generating pic allow anything. */
2201 #define ARM_LEGITIMATE_CONSTANT_P(X) (flag_pic || ! label_mentioned_p (X))
2203 #define THUMB_LEGITIMATE_CONSTANT_P(X) \
2204 ( GET_CODE (X) == CONST_INT \
2205 || GET_CODE (X) == CONST_DOUBLE \
2206 || GET_CODE (X) == CONSTANT_P_RTX \
2207 || CONSTANT_ADDRESS_P (X) \
2210 #define LEGITIMATE_CONSTANT_P(X) \
2211 (TARGET_ARM ? ARM_LEGITIMATE_CONSTANT_P (X) : THUMB_LEGITIMATE_CONSTANT_P (X))
2213 /* Special characters prefixed to function names
2214 in order to encode attribute like information.
2215 Note, '@' and '*' have already been taken. */
2216 #define SHORT_CALL_FLAG_CHAR '^'
2217 #define LONG_CALL_FLAG_CHAR '#'
2219 #define ENCODED_SHORT_CALL_ATTR_P(SYMBOL_NAME) \
2220 (*(SYMBOL_NAME) == SHORT_CALL_FLAG_CHAR)
2222 #define ENCODED_LONG_CALL_ATTR_P(SYMBOL_NAME) \
2223 (*(SYMBOL_NAME) == LONG_CALL_FLAG_CHAR)
2225 #ifndef SUBTARGET_NAME_ENCODING_LENGTHS
2226 #define SUBTARGET_NAME_ENCODING_LENGTHS
2229 /* This is a C fragment for the inside of a switch statement.
2230 Each case label should return the number of characters to
2231 be stripped from the start of a function's name, if that
2232 name starts with the indicated character. */
2233 #define ARM_NAME_ENCODING_LENGTHS \
2234 case SHORT_CALL_FLAG_CHAR: return 1; \
2235 case LONG_CALL_FLAG_CHAR: return 1; \
2236 case '*': return 1; \
2237 SUBTARGET_NAME_ENCODING_LENGTHS
2239 /* This is how to output a reference to a user-level label named NAME.
2240 `assemble_name' uses this. */
2241 #undef ASM_OUTPUT_LABELREF
2242 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
2243 arm_asm_output_labelref (FILE, NAME)
2245 #define ARM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
2246 arm_encode_call_attribute (DECL, SHORT_CALL_FLAG_CHAR)
2248 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
2249 and check its validity for a certain class.
2250 We have two alternate definitions for each of them.
2251 The usual definition accepts all pseudo regs; the other rejects
2252 them unless they have been allocated suitable hard regs.
2253 The symbol REG_OK_STRICT causes the latter definition to be used. */
2254 #ifndef REG_OK_STRICT
2256 #define ARM_REG_OK_FOR_BASE_P(X) \
2257 (REGNO (X) <= LAST_ARM_REGNUM \
2258 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
2259 || REGNO (X) == FRAME_POINTER_REGNUM \
2260 || REGNO (X) == ARG_POINTER_REGNUM)
2262 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
2263 (REGNO (X) <= LAST_LO_REGNUM \
2264 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
2265 || (GET_MODE_SIZE (MODE) >= 4 \
2266 && (REGNO (X) == STACK_POINTER_REGNUM \
2267 || (X) == hard_frame_pointer_rtx \
2268 || (X) == arg_pointer_rtx)))
2270 #define REG_STRICT_P 0
2272 #else /* REG_OK_STRICT */
2274 #define ARM_REG_OK_FOR_BASE_P(X) \
2275 ARM_REGNO_OK_FOR_BASE_P (REGNO (X))
2277 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
2278 THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO (X), MODE)
2280 #define REG_STRICT_P 1
2282 #endif /* REG_OK_STRICT */
2284 /* Now define some helpers in terms of the above. */
2286 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
2288 ? THUMB_REG_MODE_OK_FOR_BASE_P (X, MODE) \
2289 : ARM_REG_OK_FOR_BASE_P (X))
2291 #define ARM_REG_OK_FOR_INDEX_P(X) ARM_REG_OK_FOR_BASE_P (X)
2293 /* For Thumb, a valid index register is anything that can be used in
2294 a byte load instruction. */
2295 #define THUMB_REG_OK_FOR_INDEX_P(X) THUMB_REG_MODE_OK_FOR_BASE_P (X, QImode)
2297 /* Nonzero if X is a hard reg that can be used as an index
2298 or if it is a pseudo reg. On the Thumb, the stack pointer
2300 #define REG_OK_FOR_INDEX_P(X) \
2302 ? THUMB_REG_OK_FOR_INDEX_P (X) \
2303 : ARM_REG_OK_FOR_INDEX_P (X))
2306 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
2307 that is a valid memory address for an instruction.
2308 The MODE argument is the machine mode for the MEM expression
2309 that wants to use this address. */
2311 #define ARM_BASE_REGISTER_RTX_P(X) \
2312 (GET_CODE (X) == REG && ARM_REG_OK_FOR_BASE_P (X))
2314 #define ARM_INDEX_REGISTER_RTX_P(X) \
2315 (GET_CODE (X) == REG && ARM_REG_OK_FOR_INDEX_P (X))
2317 #define ARM_GO_IF_LEGITIMATE_ADDRESS(MODE,X,WIN) \
2319 if (arm_legitimate_address_p (MODE, X, SET, REG_STRICT_P)) \
2323 #define THUMB_GO_IF_LEGITIMATE_ADDRESS(MODE,X,WIN) \
2325 if (thumb_legitimate_address_p (MODE, X, REG_STRICT_P)) \
2329 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \
2331 ARM_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN) \
2332 else /* if (TARGET_THUMB) */ \
2333 THUMB_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN)
2336 /* Try machine-dependent ways of modifying an illegitimate address
2337 to be legitimate. If we find one, return the new, valid address. */
2338 #define ARM_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2340 X = arm_legitimize_address (X, OLDX, MODE); \
2343 #define THUMB_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2345 X = thumb_legitimize_address (X, OLDX, MODE); \
2348 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2351 ARM_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN); \
2353 THUMB_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN); \
2355 if (memory_address_p (MODE, X)) \
2359 /* Go to LABEL if ADDR (a legitimate address expression)
2360 has an effect that depends on the machine mode it is used for. */
2361 #define ARM_GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2363 if ( GET_CODE (ADDR) == PRE_DEC || GET_CODE (ADDR) == POST_DEC \
2364 || GET_CODE (ADDR) == PRE_INC || GET_CODE (ADDR) == POST_INC) \
2368 /* Nothing helpful to do for the Thumb */
2369 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2371 ARM_GO_IF_MODE_DEPENDENT_ADDRESS (ADDR, LABEL)
2374 /* Specify the machine mode that this machine uses
2375 for the index in the tablejump instruction. */
2376 #define CASE_VECTOR_MODE Pmode
2378 /* signed 'char' is most compatible, but RISC OS wants it unsigned.
2379 unsigned is probably best, but may break some code. */
2380 #ifndef DEFAULT_SIGNED_CHAR
2381 #define DEFAULT_SIGNED_CHAR 0
2384 /* Don't cse the address of the function being compiled. */
2385 #define NO_RECURSIVE_FUNCTION_CSE 1
2387 /* Max number of bytes we can move from memory to memory
2388 in one reasonably fast instruction. */
2392 #define MOVE_RATIO (arm_tune_xscale ? 4 : 2)
2394 /* Define if operations between registers always perform the operation
2395 on the full register even if a narrower mode is specified. */
2396 #define WORD_REGISTER_OPERATIONS
2398 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
2399 will either zero-extend or sign-extend. The value of this macro should
2400 be the code that says which one of the two operations is implicitly
2401 done, NIL if none. */
2402 #define LOAD_EXTEND_OP(MODE) \
2403 (TARGET_THUMB ? ZERO_EXTEND : \
2404 ((arm_arch4 || (MODE) == QImode) ? ZERO_EXTEND \
2405 : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : NIL)))
2407 /* Nonzero if access to memory by bytes is slow and undesirable. */
2408 #define SLOW_BYTE_ACCESS 0
2410 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1
2412 /* Immediate shift counts are truncated by the output routines (or was it
2413 the assembler?). Shift counts in a register are truncated by ARM. Note
2414 that the native compiler puts too large (> 32) immediate shift counts
2415 into a register and shifts by the register, letting the ARM decide what
2416 to do instead of doing that itself. */
2417 /* This is all wrong. Defining SHIFT_COUNT_TRUNCATED tells combine that
2418 code like (X << (Y % 32)) for register X, Y is equivalent to (X << Y).
2419 On the arm, Y in a register is used modulo 256 for the shift. Only for
2420 rotates is modulo 32 used. */
2421 /* #define SHIFT_COUNT_TRUNCATED 1 */
2423 /* All integers have the same format so truncation is easy. */
2424 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2426 /* Calling from registers is a massive pain. */
2427 #define NO_FUNCTION_CSE 1
2429 /* The machine modes of pointers and functions */
2430 #define Pmode SImode
2431 #define FUNCTION_MODE Pmode
2433 #define ARM_FRAME_RTX(X) \
2434 ( (X) == frame_pointer_rtx || (X) == stack_pointer_rtx \
2435 || (X) == arg_pointer_rtx)
2437 /* Moves to and from memory are quite expensive */
2438 #define MEMORY_MOVE_COST(M, CLASS, IN) \
2439 (TARGET_ARM ? 10 : \
2440 ((GET_MODE_SIZE (M) < 4 ? 8 : 2 * GET_MODE_SIZE (M)) \
2441 * (CLASS == LO_REGS ? 1 : 2)))
2443 /* Try to generate sequences that don't involve branches, we can then use
2444 conditional instructions */
2445 #define BRANCH_COST \
2446 (TARGET_ARM ? 4 : (optimize > 1 ? 1 : 0))
2448 /* Position Independent Code. */
2449 /* We decide which register to use based on the compilation options and
2450 the assembler in use; this is more general than the APCS restriction of
2451 using sb (r9) all the time. */
2452 extern int arm_pic_register;
2454 /* Used when parsing command line option -mpic-register=. */
2455 extern const char * arm_pic_register_string;
2457 /* The register number of the register used to address a table of static
2458 data addresses in memory. */
2459 #define PIC_OFFSET_TABLE_REGNUM arm_pic_register
2461 #define FINALIZE_PIC arm_finalize_pic (1)
2463 /* We can't directly access anything that contains a symbol,
2464 nor can we indirect via the constant pool. */
2465 #define LEGITIMATE_PIC_OPERAND_P(X) \
2466 (!(symbol_mentioned_p (X) \
2467 || label_mentioned_p (X) \
2468 || (GET_CODE (X) == SYMBOL_REF \
2469 && CONSTANT_POOL_ADDRESS_P (X) \
2470 && (symbol_mentioned_p (get_pool_constant (X)) \
2471 || label_mentioned_p (get_pool_constant (X))))))
2473 /* We need to know when we are making a constant pool; this determines
2474 whether data needs to be in the GOT or can be referenced via a GOT
2476 extern int making_const_table;
2478 /* Handle pragmas for compatibility with Intel's compilers. */
2479 #define REGISTER_TARGET_PRAGMAS() do { \
2480 c_register_pragma (0, "long_calls", arm_pr_long_calls); \
2481 c_register_pragma (0, "no_long_calls", arm_pr_no_long_calls); \
2482 c_register_pragma (0, "long_calls_off", arm_pr_long_calls_off); \
2485 /* Condition code information. */
2486 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
2487 return the mode to be used for the comparison. */
2489 #define SELECT_CC_MODE(OP, X, Y) arm_select_cc_mode (OP, X, Y)
2491 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode)
2493 #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) \
2496 if (GET_CODE (OP1) == CONST_INT \
2497 && ! (const_ok_for_arm (INTVAL (OP1)) \
2498 || (const_ok_for_arm (- INTVAL (OP1))))) \
2500 rtx const_op = OP1; \
2501 CODE = arm_canonicalize_comparison ((CODE), &const_op); \
2507 /* The arm5 clz instruction returns 32. */
2508 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
2511 #define ASM_APP_OFF (TARGET_THUMB ? "\t.code\t16\n" : "")
2513 /* Output a push or a pop instruction (only used when profiling). */
2514 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2518 asm_fprintf (STREAM,"\tstmfd\t%r!,{%r}\n", \
2519 STACK_POINTER_REGNUM, REGNO); \
2521 asm_fprintf (STREAM, "\tpush {%r}\n", REGNO); \
2525 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2529 asm_fprintf (STREAM, "\tldmfd\t%r!,{%r}\n", \
2530 STACK_POINTER_REGNUM, REGNO); \
2532 asm_fprintf (STREAM, "\tpop {%r}\n", REGNO); \
2535 /* This is how to output a label which precedes a jumptable. Since
2536 Thumb instructions are 2 bytes, we may need explicit alignment here. */
2537 #undef ASM_OUTPUT_CASE_LABEL
2538 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
2542 ASM_OUTPUT_ALIGN (FILE, 2); \
2543 (*targetm.asm_out.internal_label) (FILE, PREFIX, NUM); \
2547 #define ARM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
2552 if (is_called_in_ARM_mode (DECL) \
2553 || current_function_is_thunk) \
2554 fprintf (STREAM, "\t.code 32\n") ; \
2556 fprintf (STREAM, "\t.code 16\n\t.thumb_func\n") ; \
2558 if (TARGET_POKE_FUNCTION_NAME) \
2559 arm_poke_function_name (STREAM, (char *) NAME); \
2563 /* For aliases of functions we use .thumb_set instead. */
2564 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL1, DECL2) \
2567 const char *const LABEL1 = XSTR (XEXP (DECL_RTL (decl), 0), 0); \
2568 const char *const LABEL2 = IDENTIFIER_POINTER (DECL2); \
2570 if (TARGET_THUMB && TREE_CODE (DECL1) == FUNCTION_DECL) \
2572 fprintf (FILE, "\t.thumb_set "); \
2573 assemble_name (FILE, LABEL1); \
2574 fprintf (FILE, ","); \
2575 assemble_name (FILE, LABEL2); \
2576 fprintf (FILE, "\n"); \
2579 ASM_OUTPUT_DEF (FILE, LABEL1, LABEL2); \
2583 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
2584 /* To support -falign-* switches we need to use .p2align so
2585 that alignment directives in code sections will be padded
2586 with no-op instructions, rather than zeroes. */
2587 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \
2590 if ((MAX_SKIP) == 0) \
2591 fprintf ((FILE), "\t.p2align %d\n", (int) (LOG)); \
2593 fprintf ((FILE), "\t.p2align %d,,%d\n", \
2594 (int) (LOG), (int) (MAX_SKIP)); \
2598 /* Only perform branch elimination (by making instructions conditional) if
2599 we're optimizing. Otherwise it's of no use anyway. */
2600 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
2601 if (TARGET_ARM && optimize) \
2602 arm_final_prescan_insn (INSN); \
2603 else if (TARGET_THUMB) \
2604 thumb_final_prescan_insn (INSN)
2606 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2607 (CODE == '@' || CODE == '|' \
2608 || (TARGET_ARM && (CODE == '?')) \
2609 || (TARGET_THUMB && (CODE == '_')))
2611 /* Output an operand of an instruction. */
2612 #define PRINT_OPERAND(STREAM, X, CODE) \
2613 arm_print_operand (STREAM, X, CODE)
2615 #define ARM_SIGN_EXTEND(x) ((HOST_WIDE_INT) \
2616 (HOST_BITS_PER_WIDE_INT <= 32 ? (unsigned HOST_WIDE_INT) (x) \
2617 : ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0xffffffff) |\
2618 ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0x80000000) \
2619 ? ((~ (unsigned HOST_WIDE_INT) 0) \
2620 & ~ (unsigned HOST_WIDE_INT) 0xffffffff) \
2623 /* Output the address of an operand. */
2624 #define ARM_PRINT_OPERAND_ADDRESS(STREAM, X) \
2626 int is_minus = GET_CODE (X) == MINUS; \
2628 if (GET_CODE (X) == REG) \
2629 asm_fprintf (STREAM, "[%r, #0]", REGNO (X)); \
2630 else if (GET_CODE (X) == PLUS || is_minus) \
2632 rtx base = XEXP (X, 0); \
2633 rtx index = XEXP (X, 1); \
2634 HOST_WIDE_INT offset = 0; \
2635 if (GET_CODE (base) != REG) \
2637 /* Ensure that BASE is a register. */ \
2638 /* (one of them must be). */ \
2643 switch (GET_CODE (index)) \
2646 offset = INTVAL (index); \
2649 asm_fprintf (STREAM, "[%r, #%wd]", \
2650 REGNO (base), offset); \
2654 asm_fprintf (STREAM, "[%r, %s%r]", \
2655 REGNO (base), is_minus ? "-" : "", \
2665 asm_fprintf (STREAM, "[%r, %s%r", \
2666 REGNO (base), is_minus ? "-" : "", \
2667 REGNO (XEXP (index, 0))); \
2668 arm_print_operand (STREAM, index, 'S'); \
2669 fputs ("]", STREAM); \
2677 else if (GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_INC \
2678 || GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_DEC) \
2680 extern enum machine_mode output_memory_reference_mode; \
2682 if (GET_CODE (XEXP (X, 0)) != REG) \
2685 if (GET_CODE (X) == PRE_DEC || GET_CODE (X) == PRE_INC) \
2686 asm_fprintf (STREAM, "[%r, #%s%d]!", \
2687 REGNO (XEXP (X, 0)), \
2688 GET_CODE (X) == PRE_DEC ? "-" : "", \
2689 GET_MODE_SIZE (output_memory_reference_mode)); \
2691 asm_fprintf (STREAM, "[%r], #%s%d", \
2692 REGNO (XEXP (X, 0)), \
2693 GET_CODE (X) == POST_DEC ? "-" : "", \
2694 GET_MODE_SIZE (output_memory_reference_mode)); \
2696 else if (GET_CODE (X) == PRE_MODIFY) \
2698 asm_fprintf (STREAM, "[%r, ", REGNO (XEXP (X, 0))); \
2699 if (GET_CODE (XEXP (XEXP (X, 1), 1)) == CONST_INT) \
2700 asm_fprintf (STREAM, "#%wd]!", \
2701 INTVAL (XEXP (XEXP (X, 1), 1))); \
2703 asm_fprintf (STREAM, "%r]!", \
2704 REGNO (XEXP (XEXP (X, 1), 1))); \
2706 else if (GET_CODE (X) == POST_MODIFY) \
2708 asm_fprintf (STREAM, "[%r], ", REGNO (XEXP (X, 0))); \
2709 if (GET_CODE (XEXP (XEXP (X, 1), 1)) == CONST_INT) \
2710 asm_fprintf (STREAM, "#%wd", \
2711 INTVAL (XEXP (XEXP (X, 1), 1))); \
2713 asm_fprintf (STREAM, "%r", \
2714 REGNO (XEXP (XEXP (X, 1), 1))); \
2716 else output_addr_const (STREAM, X); \
2719 #define THUMB_PRINT_OPERAND_ADDRESS(STREAM, X) \
2721 if (GET_CODE (X) == REG) \
2722 asm_fprintf (STREAM, "[%r]", REGNO (X)); \
2723 else if (GET_CODE (X) == POST_INC) \
2724 asm_fprintf (STREAM, "%r!", REGNO (XEXP (X, 0))); \
2725 else if (GET_CODE (X) == PLUS) \
2727 if (GET_CODE (XEXP (X, 0)) != REG) \
2729 if (GET_CODE (XEXP (X, 1)) == CONST_INT) \
2730 asm_fprintf (STREAM, "[%r, #%wd]", \
2731 REGNO (XEXP (X, 0)), \
2732 INTVAL (XEXP (X, 1))); \
2734 asm_fprintf (STREAM, "[%r, %r]", \
2735 REGNO (XEXP (X, 0)), \
2736 REGNO (XEXP (X, 1))); \
2739 output_addr_const (STREAM, X); \
2742 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
2744 ARM_PRINT_OPERAND_ADDRESS (STREAM, X) \
2746 THUMB_PRINT_OPERAND_ADDRESS (STREAM, X)
2748 #define OUTPUT_ADDR_CONST_EXTRA(FILE, X, FAIL) \
2749 if (GET_CODE (X) != CONST_VECTOR \
2750 || ! arm_emit_vector_const (FILE, X)) \
2753 /* A C expression whose value is RTL representing the value of the return
2754 address for the frame COUNT steps up from the current frame. */
2756 #define RETURN_ADDR_RTX(COUNT, FRAME) \
2757 arm_return_addr (COUNT, FRAME)
2759 /* Mask of the bits in the PC that contain the real return address
2760 when running in 26-bit mode. */
2761 #define RETURN_ADDR_MASK26 (0x03fffffc)
2763 /* Pick up the return address upon entry to a procedure. Used for
2764 dwarf2 unwind information. This also enables the table driven
2766 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNUM)
2767 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LR_REGNUM)
2769 /* Used to mask out junk bits from the return address, such as
2770 processor state, interrupt status, condition codes and the like. */
2771 #define MASK_RETURN_ADDR \
2772 /* If we are generating code for an ARM2/ARM3 machine or for an ARM6 \
2773 in 26 bit mode, the condition codes must be masked out of the \
2774 return address. This does not apply to ARM6 and later processors \
2775 when running in 32 bit mode. */ \
2776 ((!TARGET_APCS_32) ? (gen_int_mode (RETURN_ADDR_MASK26, Pmode)) \
2777 : (arm_arch4 || TARGET_THUMB) ? \
2778 (gen_int_mode ((unsigned long)0xffffffff, Pmode)) \
2779 : arm_gen_return_addr_mask ())
2782 /* Define the codes that are matched by predicates in arm.c */
2783 #define PREDICATE_CODES \
2784 {"s_register_operand", {SUBREG, REG}}, \
2785 {"arm_general_register_operand", {SUBREG, REG}}, \
2786 {"arm_hard_register_operand", {REG}}, \
2787 {"f_register_operand", {SUBREG, REG}}, \
2788 {"arm_add_operand", {SUBREG, REG, CONST_INT}}, \
2789 {"arm_addimm_operand", {CONST_INT}}, \
2790 {"arm_float_add_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2791 {"arm_float_rhs_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2792 {"arm_rhs_operand", {SUBREG, REG, CONST_INT}}, \
2793 {"arm_not_operand", {SUBREG, REG, CONST_INT}}, \
2794 {"reg_or_int_operand", {SUBREG, REG, CONST_INT}}, \
2795 {"index_operand", {SUBREG, REG, CONST_INT}}, \
2796 {"thumb_cmp_operand", {SUBREG, REG, CONST_INT}}, \
2797 {"thumb_cmpneg_operand", {CONST_INT}}, \
2798 {"thumb_cbrch_target_operand", {SUBREG, REG, MEM}}, \
2799 {"offsettable_memory_operand", {MEM}}, \
2800 {"alignable_memory_operand", {MEM}}, \
2801 {"shiftable_operator", {PLUS, MINUS, AND, IOR, XOR}}, \
2802 {"minmax_operator", {SMIN, SMAX, UMIN, UMAX}}, \
2803 {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT, ROTATERT, MULT}}, \
2804 {"di_operand", {SUBREG, REG, CONST_INT, CONST_DOUBLE, MEM}}, \
2805 {"nonimmediate_di_operand", {SUBREG, REG, MEM}}, \
2806 {"soft_df_operand", {SUBREG, REG, CONST_DOUBLE, MEM}}, \
2807 {"nonimmediate_soft_df_operand", {SUBREG, REG, MEM}}, \
2808 {"load_multiple_operation", {PARALLEL}}, \
2809 {"store_multiple_operation", {PARALLEL}}, \
2810 {"equality_operator", {EQ, NE}}, \
2811 {"arm_comparison_operator", {EQ, NE, LE, LT, GE, GT, GEU, GTU, LEU, \
2812 LTU, UNORDERED, ORDERED, UNLT, UNLE, \
2814 {"arm_rhsm_operand", {SUBREG, REG, CONST_INT, MEM}}, \
2815 {"const_shift_operand", {CONST_INT}}, \
2816 {"multi_register_push", {PARALLEL}}, \
2817 {"cc_register", {REG}}, \
2818 {"logical_binary_operator", {AND, IOR, XOR}}, \
2819 {"cirrus_register_operand", {REG}}, \
2820 {"cirrus_fp_register", {REG}}, \
2821 {"cirrus_shift_const", {CONST_INT}}, \
2822 {"dominant_cc_register", {REG}}, \
2823 {"arm_float_compare_operand", {REG, CONST_DOUBLE}}, \
2824 {"vfp_compare_operand", {REG, CONST_DOUBLE}},
2826 /* Define this if you have special predicates that know special things
2827 about modes. Genrecog will warn about certain forms of
2828 match_operand without a mode; if the operand predicate is listed in
2829 SPECIAL_MODE_PREDICATES, the warning will be suppressed. */
2830 #define SPECIAL_MODE_PREDICATES \
2831 "cc_register", "dominant_cc_register",
2840 ARM_BUILTIN_WAVG2BR,
2841 ARM_BUILTIN_WAVG2HR,
2868 ARM_BUILTIN_TMOVMSKB,
2869 ARM_BUILTIN_TMOVMSKH,
2870 ARM_BUILTIN_TMOVMSKW,
2879 ARM_BUILTIN_WPACKHSS,
2880 ARM_BUILTIN_WPACKWSS,
2881 ARM_BUILTIN_WPACKDSS,
2882 ARM_BUILTIN_WPACKHUS,
2883 ARM_BUILTIN_WPACKWUS,
2884 ARM_BUILTIN_WPACKDUS,
2889 ARM_BUILTIN_WADDSSB,
2890 ARM_BUILTIN_WADDSSH,
2891 ARM_BUILTIN_WADDSSW,
2892 ARM_BUILTIN_WADDUSB,
2893 ARM_BUILTIN_WADDUSH,
2894 ARM_BUILTIN_WADDUSW,
2898 ARM_BUILTIN_WSUBSSB,
2899 ARM_BUILTIN_WSUBSSH,
2900 ARM_BUILTIN_WSUBSSW,
2901 ARM_BUILTIN_WSUBUSB,
2902 ARM_BUILTIN_WSUBUSH,
2903 ARM_BUILTIN_WSUBUSW,
2910 ARM_BUILTIN_WCMPEQB,
2911 ARM_BUILTIN_WCMPEQH,
2912 ARM_BUILTIN_WCMPEQW,
2913 ARM_BUILTIN_WCMPGTUB,
2914 ARM_BUILTIN_WCMPGTUH,
2915 ARM_BUILTIN_WCMPGTUW,
2916 ARM_BUILTIN_WCMPGTSB,
2917 ARM_BUILTIN_WCMPGTSH,
2918 ARM_BUILTIN_WCMPGTSW,
2920 ARM_BUILTIN_TEXTRMSB,
2921 ARM_BUILTIN_TEXTRMSH,
2922 ARM_BUILTIN_TEXTRMSW,
2923 ARM_BUILTIN_TEXTRMUB,
2924 ARM_BUILTIN_TEXTRMUH,
2925 ARM_BUILTIN_TEXTRMUW,
2975 ARM_BUILTIN_WUNPCKIHB,
2976 ARM_BUILTIN_WUNPCKIHH,
2977 ARM_BUILTIN_WUNPCKIHW,
2978 ARM_BUILTIN_WUNPCKILB,
2979 ARM_BUILTIN_WUNPCKILH,
2980 ARM_BUILTIN_WUNPCKILW,
2982 ARM_BUILTIN_WUNPCKEHSB,
2983 ARM_BUILTIN_WUNPCKEHSH,
2984 ARM_BUILTIN_WUNPCKEHSW,
2985 ARM_BUILTIN_WUNPCKEHUB,
2986 ARM_BUILTIN_WUNPCKEHUH,
2987 ARM_BUILTIN_WUNPCKEHUW,
2988 ARM_BUILTIN_WUNPCKELSB,
2989 ARM_BUILTIN_WUNPCKELSH,
2990 ARM_BUILTIN_WUNPCKELSW,
2991 ARM_BUILTIN_WUNPCKELUB,
2992 ARM_BUILTIN_WUNPCKELUH,
2993 ARM_BUILTIN_WUNPCKELUW,
2997 #endif /* ! GCC_ARM_H */
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