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 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 GNU CC.
11 GNU CC is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 2, or (at your option)
16 GNU CC is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with GNU CC; see the file COPYING. If not, write to
23 the Free Software Foundation, 59 Temple Place - Suite 330,
24 Boston, MA 02111-1307, USA. */
29 /* Target CPU builtins. */
30 #define TARGET_CPU_CPP_BUILTINS() \
34 builtin_define ("__arm__"); \
36 builtin_define ("__thumb__"); \
40 builtin_define ("__ARMEB__"); \
42 builtin_define ("__THUMBEB__"); \
43 if (TARGET_LITTLE_WORDS) \
44 builtin_define ("__ARMWEL__"); \
48 builtin_define ("__ARMEL__"); \
50 builtin_define ("__THUMBEL__"); \
54 builtin_define ("__APCS_32__"); \
56 builtin_define ("__APCS_26__"); \
58 if (TARGET_SOFT_FLOAT) \
59 builtin_define ("__SOFTFP__"); \
61 /* FIXME: TARGET_HARD_FLOAT currently implies \
63 if (TARGET_VFP && !TARGET_HARD_FLOAT) \
64 builtin_define ("__VFP_FP__"); \
66 /* Add a define for interworking. \
67 Needed when building libgcc.a. */ \
68 if (TARGET_INTERWORK) \
69 builtin_define ("__THUMB_INTERWORK__"); \
71 builtin_assert ("cpu=arm"); \
72 builtin_assert ("machine=arm"); \
75 #define TARGET_CPU_arm2 0x0000
76 #define TARGET_CPU_arm250 0x0000
77 #define TARGET_CPU_arm3 0x0000
78 #define TARGET_CPU_arm6 0x0001
79 #define TARGET_CPU_arm600 0x0001
80 #define TARGET_CPU_arm610 0x0002
81 #define TARGET_CPU_arm7 0x0001
82 #define TARGET_CPU_arm7m 0x0004
83 #define TARGET_CPU_arm7dm 0x0004
84 #define TARGET_CPU_arm7dmi 0x0004
85 #define TARGET_CPU_arm700 0x0001
86 #define TARGET_CPU_arm710 0x0002
87 #define TARGET_CPU_arm7100 0x0002
88 #define TARGET_CPU_arm7500 0x0002
89 #define TARGET_CPU_arm7500fe 0x1001
90 #define TARGET_CPU_arm7tdmi 0x0008
91 #define TARGET_CPU_arm8 0x0010
92 #define TARGET_CPU_arm810 0x0020
93 #define TARGET_CPU_strongarm 0x0040
94 #define TARGET_CPU_strongarm110 0x0040
95 #define TARGET_CPU_strongarm1100 0x0040
96 #define TARGET_CPU_arm9 0x0080
97 #define TARGET_CPU_arm9tdmi 0x0080
98 #define TARGET_CPU_xscale 0x0100
99 /* Configure didn't specify. */
100 #define TARGET_CPU_generic 0x8000
102 typedef enum arm_cond_code
104 ARM_EQ = 0, ARM_NE, ARM_CS, ARM_CC, ARM_MI, ARM_PL, ARM_VS, ARM_VC,
105 ARM_HI, ARM_LS, ARM_GE, ARM_LT, ARM_GT, ARM_LE, ARM_AL, ARM_NV
109 extern arm_cc arm_current_cc;
111 #define ARM_INVERSE_CONDITION_CODE(X) ((arm_cc) (((int)X) ^ 1))
113 extern int arm_target_label;
114 extern int arm_ccfsm_state;
115 extern GTY(()) rtx arm_target_insn;
116 /* Run-time compilation parameters selecting different hardware subsets. */
117 extern int target_flags;
118 /* The floating point instruction architecture, can be 2 or 3 */
119 extern const char * target_fp_name;
120 /* Define the information needed to generate branch insns. This is
121 stored from the compare operation. */
122 extern GTY(()) rtx arm_compare_op0;
123 extern GTY(()) rtx arm_compare_op1;
124 /* The label of the current constant pool. */
125 extern rtx pool_vector_label;
126 /* Set to 1 when a return insn is output, this means that the epilogue
128 extern int return_used_this_function;
129 /* Used to produce AOF syntax assembler. */
130 extern GTY(()) rtx aof_pic_label;
132 /* Just in case configure has failed to define anything. */
133 #ifndef TARGET_CPU_DEFAULT
134 #define TARGET_CPU_DEFAULT TARGET_CPU_generic
137 /* If the configuration file doesn't specify the cpu, the subtarget may
138 override it. If it doesn't, then default to an ARM6. */
139 #if TARGET_CPU_DEFAULT == TARGET_CPU_generic
140 #undef TARGET_CPU_DEFAULT
142 #ifdef SUBTARGET_CPU_DEFAULT
143 #define TARGET_CPU_DEFAULT SUBTARGET_CPU_DEFAULT
145 #define TARGET_CPU_DEFAULT TARGET_CPU_arm6
149 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm2
150 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_2__"
152 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm6 || TARGET_CPU_DEFAULT == TARGET_CPU_arm610 || TARGET_CPU_DEFAULT == TARGET_CPU_arm7500fe
153 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3__"
155 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7m
156 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_3M__"
158 #if TARGET_CPU_DEFAULT == TARGET_CPU_arm7tdmi || TARGET_CPU_DEFAULT == TARGET_CPU_arm9 || TARGET_CPU_DEFAULT == TARGET_CPU_arm9tdmi
159 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4T__"
161 #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
162 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_4__"
164 #if TARGET_CPU_DEFAULT == TARGET_CPU_xscale
165 #define CPP_ARCH_DEFAULT_SPEC "-D__ARM_ARCH_5TE__ -D__XSCALE__"
167 Unrecognized value in TARGET_CPU_DEFAULT.
176 #define CPP_SPEC "%(cpp_cpu_arch) %(subtarget_cpp_spec) \
177 %{mapcs-32:%{mapcs-26: \
178 %e-mapcs-26 and -mapcs-32 may not be used together}} \
179 %{msoft-float:%{mhard-float: \
180 %e-msoft-float and -mhard_float may not be used together}} \
181 %{mbig-endian:%{mlittle-endian: \
182 %e-mbig-endian and -mlittle-endian may not be used together}}"
184 /* Set the architecture define -- if -march= is set, then it overrides
185 the -mcpu= setting. */
186 #define CPP_CPU_ARCH_SPEC "\
187 %{march=arm2:-D__ARM_ARCH_2__} \
188 %{march=arm250:-D__ARM_ARCH_2__} \
189 %{march=arm3:-D__ARM_ARCH_2__} \
190 %{march=arm6:-D__ARM_ARCH_3__} \
191 %{march=arm600:-D__ARM_ARCH_3__} \
192 %{march=arm610:-D__ARM_ARCH_3__} \
193 %{march=arm7:-D__ARM_ARCH_3__} \
194 %{march=arm700:-D__ARM_ARCH_3__} \
195 %{march=arm710:-D__ARM_ARCH_3__} \
196 %{march=arm720:-D__ARM_ARCH_3__} \
197 %{march=arm7100:-D__ARM_ARCH_3__} \
198 %{march=arm7500:-D__ARM_ARCH_3__} \
199 %{march=arm7500fe:-D__ARM_ARCH_3__} \
200 %{march=arm7m:-D__ARM_ARCH_3M__} \
201 %{march=arm7dm:-D__ARM_ARCH_3M__} \
202 %{march=arm7dmi:-D__ARM_ARCH_3M__} \
203 %{march=arm7tdmi:-D__ARM_ARCH_4T__} \
204 %{march=arm8:-D__ARM_ARCH_4__} \
205 %{march=arm810:-D__ARM_ARCH_4__} \
206 %{march=arm9:-D__ARM_ARCH_4T__} \
207 %{march=arm920:-D__ARM_ARCH_4__} \
208 %{march=arm920t:-D__ARM_ARCH_4T__} \
209 %{march=arm9tdmi:-D__ARM_ARCH_4T__} \
210 %{march=strongarm:-D__ARM_ARCH_4__} \
211 %{march=strongarm110:-D__ARM_ARCH_4__} \
212 %{march=strongarm1100:-D__ARM_ARCH_4__} \
213 %{march=xscale:-D__ARM_ARCH_5TE__} \
214 %{march=xscale:-D__XSCALE__} \
215 %{march=armv2:-D__ARM_ARCH_2__} \
216 %{march=armv2a:-D__ARM_ARCH_2__} \
217 %{march=armv3:-D__ARM_ARCH_3__} \
218 %{march=armv3m:-D__ARM_ARCH_3M__} \
219 %{march=armv4:-D__ARM_ARCH_4__} \
220 %{march=armv4t:-D__ARM_ARCH_4T__} \
221 %{march=armv5:-D__ARM_ARCH_5__} \
222 %{march=armv5t:-D__ARM_ARCH_5T__} \
223 %{march=armv5e:-D__ARM_ARCH_5E__} \
224 %{march=armv5te:-D__ARM_ARCH_5TE__} \
226 %{mcpu=arm2:-D__ARM_ARCH_2__} \
227 %{mcpu=arm250:-D__ARM_ARCH_2__} \
228 %{mcpu=arm3:-D__ARM_ARCH_2__} \
229 %{mcpu=arm6:-D__ARM_ARCH_3__} \
230 %{mcpu=arm600:-D__ARM_ARCH_3__} \
231 %{mcpu=arm610:-D__ARM_ARCH_3__} \
232 %{mcpu=arm7:-D__ARM_ARCH_3__} \
233 %{mcpu=arm700:-D__ARM_ARCH_3__} \
234 %{mcpu=arm710:-D__ARM_ARCH_3__} \
235 %{mcpu=arm720:-D__ARM_ARCH_3__} \
236 %{mcpu=arm7100:-D__ARM_ARCH_3__} \
237 %{mcpu=arm7500:-D__ARM_ARCH_3__} \
238 %{mcpu=arm7500fe:-D__ARM_ARCH_3__} \
239 %{mcpu=arm7m:-D__ARM_ARCH_3M__} \
240 %{mcpu=arm7dm:-D__ARM_ARCH_3M__} \
241 %{mcpu=arm7dmi:-D__ARM_ARCH_3M__} \
242 %{mcpu=arm7tdmi:-D__ARM_ARCH_4T__} \
243 %{mcpu=arm8:-D__ARM_ARCH_4__} \
244 %{mcpu=arm810:-D__ARM_ARCH_4__} \
245 %{mcpu=arm9:-D__ARM_ARCH_4T__} \
246 %{mcpu=arm920:-D__ARM_ARCH_4__} \
247 %{mcpu=arm920t:-D__ARM_ARCH_4T__} \
248 %{mcpu=arm9tdmi:-D__ARM_ARCH_4T__} \
249 %{mcpu=strongarm:-D__ARM_ARCH_4__} \
250 %{mcpu=strongarm110:-D__ARM_ARCH_4__} \
251 %{mcpu=strongarm1100:-D__ARM_ARCH_4__} \
252 %{mcpu=xscale:-D__ARM_ARCH_5TE__} \
253 %{mcpu=xscale:-D__XSCALE__} \
254 %{!mcpu*:%(cpp_cpu_arch_default)}} \
261 /* This macro defines names of additional specifications to put in the specs
262 that can be used in various specifications like CC1_SPEC. Its definition
263 is an initializer with a subgrouping for each command option.
265 Each subgrouping contains a string constant, that defines the
266 specification name, and a string constant that used by the GNU CC driver
269 Do not define this macro if it does not need to do anything. */
270 #define EXTRA_SPECS \
271 { "cpp_cpu_arch", CPP_CPU_ARCH_SPEC }, \
272 { "cpp_cpu_arch_default", CPP_ARCH_DEFAULT_SPEC }, \
273 { "subtarget_cpp_spec", SUBTARGET_CPP_SPEC }, \
274 SUBTARGET_EXTRA_SPECS
276 #ifndef SUBTARGET_EXTRA_SPECS
277 #define SUBTARGET_EXTRA_SPECS
280 #ifndef SUBTARGET_CPP_SPEC
281 #define SUBTARGET_CPP_SPEC ""
284 /* Run-time Target Specification. */
285 #ifndef TARGET_VERSION
286 #define TARGET_VERSION fputs (" (ARM/generic)", stderr);
289 /* Nonzero if the function prologue (and epilogue) should obey
290 the ARM Procedure Call Standard. */
291 #define ARM_FLAG_APCS_FRAME (1 << 0)
293 /* Nonzero if the function prologue should output the function name to enable
294 the post mortem debugger to print a backtrace (very useful on RISCOS,
295 unused on RISCiX). Specifying this flag also enables
296 -fno-omit-frame-pointer.
297 XXX Must still be implemented in the prologue. */
298 #define ARM_FLAG_POKE (1 << 1)
300 /* Nonzero if floating point instructions are emulated by the FPE, in which
301 case instruction scheduling becomes very uninteresting. */
302 #define ARM_FLAG_FPE (1 << 2)
304 /* Nonzero if destined for a processor in 32-bit program mode. Takes out bit
305 that assume restoration of the condition flags when returning from a
306 branch and link (ie a function). */
307 #define ARM_FLAG_APCS_32 (1 << 3)
309 /* FLAGS 0x0008 and 0x0010 are now spare (used to be arm3/6 selection). */
311 /* Nonzero if stack checking should be performed on entry to each function
312 which allocates temporary variables on the stack. */
313 #define ARM_FLAG_APCS_STACK (1 << 4)
315 /* Nonzero if floating point parameters should be passed to functions in
316 floating point registers. */
317 #define ARM_FLAG_APCS_FLOAT (1 << 5)
319 /* Nonzero if re-entrant, position independent code should be generated.
320 This is equivalent to -fpic. */
321 #define ARM_FLAG_APCS_REENT (1 << 6)
323 /* Nonzero if the MMU will trap unaligned word accesses, so shorts must
324 be loaded using either LDRH or LDRB instructions. */
325 #define ARM_FLAG_MMU_TRAPS (1 << 7)
327 /* Nonzero if all floating point instructions are missing (and there is no
328 emulator either). Generate function calls for all ops in this case. */
329 #define ARM_FLAG_SOFT_FLOAT (1 << 8)
331 /* Nonzero if we should compile with BYTES_BIG_ENDIAN set to 1. */
332 #define ARM_FLAG_BIG_END (1 << 9)
334 /* Nonzero if we should compile for Thumb interworking. */
335 #define ARM_FLAG_INTERWORK (1 << 10)
337 /* Nonzero if we should have little-endian words even when compiling for
338 big-endian (for backwards compatibility with older versions of GCC). */
339 #define ARM_FLAG_LITTLE_WORDS (1 << 11)
341 /* Nonzero if we need to protect the prolog from scheduling */
342 #define ARM_FLAG_NO_SCHED_PRO (1 << 12)
344 /* Nonzero if a call to abort should be generated if a noreturn
345 function tries to return. */
346 #define ARM_FLAG_ABORT_NORETURN (1 << 13)
348 /* Nonzero if function prologues should not load the PIC register. */
349 #define ARM_FLAG_SINGLE_PIC_BASE (1 << 14)
351 /* Nonzero if all call instructions should be indirect. */
352 #define ARM_FLAG_LONG_CALLS (1 << 15)
354 /* Nonzero means that the target ISA is the THUMB, not the ARM. */
355 #define ARM_FLAG_THUMB (1 << 16)
357 /* Set if a TPCS style stack frame should be generated, for non-leaf
358 functions, even if they do not need one. */
359 #define THUMB_FLAG_BACKTRACE (1 << 17)
361 /* Set if a TPCS style stack frame should be generated, for leaf
362 functions, even if they do not need one. */
363 #define THUMB_FLAG_LEAF_BACKTRACE (1 << 18)
365 /* Set if externally visible functions should assume that they
366 might be called in ARM mode, from a non-thumb aware code. */
367 #define THUMB_FLAG_CALLEE_SUPER_INTERWORKING (1 << 19)
369 /* Set if calls via function pointers should assume that their
370 destination is non-Thumb aware. */
371 #define THUMB_FLAG_CALLER_SUPER_INTERWORKING (1 << 20)
373 /* Nonzero means target uses VFP FP. */
374 #define ARM_FLAG_VFP (1 << 21)
376 /* Nonzero means to use ARM/Thumb Procedure Call Standard conventions. */
377 #define ARM_FLAG_ATPCS (1 << 22)
379 #define TARGET_APCS_FRAME (target_flags & ARM_FLAG_APCS_FRAME)
380 #define TARGET_POKE_FUNCTION_NAME (target_flags & ARM_FLAG_POKE)
381 #define TARGET_FPE (target_flags & ARM_FLAG_FPE)
382 #define TARGET_APCS_32 (target_flags & ARM_FLAG_APCS_32)
383 #define TARGET_APCS_STACK (target_flags & ARM_FLAG_APCS_STACK)
384 #define TARGET_APCS_FLOAT (target_flags & ARM_FLAG_APCS_FLOAT)
385 #define TARGET_APCS_REENT (target_flags & ARM_FLAG_APCS_REENT)
386 #define TARGET_ATPCS (target_flags & ARM_FLAG_ATPCS)
387 #define TARGET_MMU_TRAPS (target_flags & ARM_FLAG_MMU_TRAPS)
388 #define TARGET_SOFT_FLOAT (target_flags & ARM_FLAG_SOFT_FLOAT)
389 #define TARGET_HARD_FLOAT (! TARGET_SOFT_FLOAT)
390 #define TARGET_VFP (target_flags & ARM_FLAG_VFP)
391 #define TARGET_BIG_END (target_flags & ARM_FLAG_BIG_END)
392 #define TARGET_INTERWORK (target_flags & ARM_FLAG_INTERWORK)
393 #define TARGET_LITTLE_WORDS (target_flags & ARM_FLAG_LITTLE_WORDS)
394 #define TARGET_NO_SCHED_PRO (target_flags & ARM_FLAG_NO_SCHED_PRO)
395 #define TARGET_ABORT_NORETURN (target_flags & ARM_FLAG_ABORT_NORETURN)
396 #define TARGET_SINGLE_PIC_BASE (target_flags & ARM_FLAG_SINGLE_PIC_BASE)
397 #define TARGET_LONG_CALLS (target_flags & ARM_FLAG_LONG_CALLS)
398 #define TARGET_THUMB (target_flags & ARM_FLAG_THUMB)
399 #define TARGET_ARM (! TARGET_THUMB)
400 #define TARGET_EITHER 1 /* (TARGET_ARM | TARGET_THUMB) */
401 #define TARGET_CALLEE_INTERWORKING (target_flags & THUMB_FLAG_CALLEE_SUPER_INTERWORKING)
402 #define TARGET_CALLER_INTERWORKING (target_flags & THUMB_FLAG_CALLER_SUPER_INTERWORKING)
403 #define TARGET_BACKTRACE (leaf_function_p () \
404 ? (target_flags & THUMB_FLAG_LEAF_BACKTRACE) \
405 : (target_flags & THUMB_FLAG_BACKTRACE))
407 /* SUBTARGET_SWITCHES is used to add flags on a per-config basis. */
408 #ifndef SUBTARGET_SWITCHES
409 #define SUBTARGET_SWITCHES
412 #define TARGET_SWITCHES \
414 {"apcs", ARM_FLAG_APCS_FRAME, "" }, \
415 {"apcs-frame", ARM_FLAG_APCS_FRAME, \
416 N_("Generate APCS conformant stack frames") }, \
417 {"no-apcs-frame", -ARM_FLAG_APCS_FRAME, "" }, \
418 {"poke-function-name", ARM_FLAG_POKE, \
419 N_("Store function names in object code") }, \
420 {"no-poke-function-name", -ARM_FLAG_POKE, "" }, \
421 {"fpe", ARM_FLAG_FPE, "" }, \
422 {"apcs-32", ARM_FLAG_APCS_32, \
423 N_("Use the 32-bit version of the APCS") }, \
424 {"apcs-26", -ARM_FLAG_APCS_32, \
425 N_("Use the 26-bit version of the APCS") }, \
426 {"apcs-stack-check", ARM_FLAG_APCS_STACK, "" }, \
427 {"no-apcs-stack-check", -ARM_FLAG_APCS_STACK, "" }, \
428 {"apcs-float", ARM_FLAG_APCS_FLOAT, \
429 N_("Pass FP arguments in FP registers") }, \
430 {"no-apcs-float", -ARM_FLAG_APCS_FLOAT, "" }, \
431 {"apcs-reentrant", ARM_FLAG_APCS_REENT, \
432 N_("Generate re-entrant, PIC code") }, \
433 {"no-apcs-reentrant", -ARM_FLAG_APCS_REENT, "" }, \
434 {"alignment-traps", ARM_FLAG_MMU_TRAPS, \
435 N_("The MMU will trap on unaligned accesses") }, \
436 {"no-alignment-traps", -ARM_FLAG_MMU_TRAPS, "" }, \
437 {"short-load-bytes", ARM_FLAG_MMU_TRAPS, "" }, \
438 {"no-short-load-bytes", -ARM_FLAG_MMU_TRAPS, "" }, \
439 {"short-load-words", -ARM_FLAG_MMU_TRAPS, "" }, \
440 {"no-short-load-words", ARM_FLAG_MMU_TRAPS, "" }, \
441 {"soft-float", ARM_FLAG_SOFT_FLOAT, \
442 N_("Use library calls to perform FP operations") }, \
443 {"hard-float", -ARM_FLAG_SOFT_FLOAT, \
444 N_("Use hardware floating point instructions") }, \
445 {"big-endian", ARM_FLAG_BIG_END, \
446 N_("Assume target CPU is configured as big endian") }, \
447 {"little-endian", -ARM_FLAG_BIG_END, \
448 N_("Assume target CPU is configured as little endian") }, \
449 {"words-little-endian", ARM_FLAG_LITTLE_WORDS, \
450 N_("Assume big endian bytes, little endian words") }, \
451 {"thumb-interwork", ARM_FLAG_INTERWORK, \
452 N_("Support calls between Thumb and ARM instruction sets") }, \
453 {"no-thumb-interwork", -ARM_FLAG_INTERWORK, "" }, \
454 {"abort-on-noreturn", ARM_FLAG_ABORT_NORETURN, \
455 N_("Generate a call to abort if a noreturn function returns")}, \
456 {"no-abort-on-noreturn", -ARM_FLAG_ABORT_NORETURN, "" }, \
457 {"no-sched-prolog", ARM_FLAG_NO_SCHED_PRO, \
458 N_("Do not move instructions into a function's prologue") }, \
459 {"sched-prolog", -ARM_FLAG_NO_SCHED_PRO, "" }, \
460 {"single-pic-base", ARM_FLAG_SINGLE_PIC_BASE, \
461 N_("Do not load the PIC register in function prologues") }, \
462 {"no-single-pic-base", -ARM_FLAG_SINGLE_PIC_BASE, "" }, \
463 {"long-calls", ARM_FLAG_LONG_CALLS, \
464 N_("Generate call insns as indirect calls, if necessary") }, \
465 {"no-long-calls", -ARM_FLAG_LONG_CALLS, "" }, \
466 {"thumb", ARM_FLAG_THUMB, \
467 N_("Compile for the Thumb not the ARM") }, \
468 {"no-thumb", -ARM_FLAG_THUMB, "" }, \
469 {"arm", -ARM_FLAG_THUMB, "" }, \
470 {"tpcs-frame", THUMB_FLAG_BACKTRACE, \
471 N_("Thumb: Generate (non-leaf) stack frames even if not needed") }, \
472 {"no-tpcs-frame", -THUMB_FLAG_BACKTRACE, "" }, \
473 {"tpcs-leaf-frame", THUMB_FLAG_LEAF_BACKTRACE, \
474 N_("Thumb: Generate (leaf) stack frames even if not needed") }, \
475 {"no-tpcs-leaf-frame", -THUMB_FLAG_LEAF_BACKTRACE, "" }, \
476 {"callee-super-interworking", THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
477 N_("Thumb: Assume non-static functions may be called from ARM code") }, \
478 {"no-callee-super-interworking", -THUMB_FLAG_CALLEE_SUPER_INTERWORKING, \
480 {"caller-super-interworking", THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
481 N_("Thumb: Assume function pointers may go to non-Thumb aware code") }, \
482 {"no-caller-super-interworking", -THUMB_FLAG_CALLER_SUPER_INTERWORKING, \
485 {"", TARGET_DEFAULT, "" } \
488 #define TARGET_OPTIONS \
490 {"cpu=", & arm_select[0].string, \
491 N_("Specify the name of the target CPU") }, \
492 {"arch=", & arm_select[1].string, \
493 N_("Specify the name of the target architecture") }, \
494 {"tune=", & arm_select[2].string, "" }, \
495 {"fpe=", & target_fp_name, "" }, \
496 {"fp=", & target_fp_name, \
497 N_("Specify the version of the floating point emulator") }, \
498 {"structure-size-boundary=", & structure_size_string, \
499 N_("Specify the minimum bit alignment of structures") }, \
500 {"pic-register=", & arm_pic_register_string, \
501 N_("Specify the register to be used for PIC addressing") } \
504 struct arm_cpu_select
508 const struct processors * processors;
511 /* This is a magic array. If the user specifies a command line switch
512 which matches one of the entries in TARGET_OPTIONS then the corresponding
513 string pointer will be set to the value specified by the user. */
514 extern struct arm_cpu_select arm_select[];
522 /* Recast the program mode class to be the prog_mode attribute */
523 #define arm_prog_mode ((enum attr_prog_mode) arm_prgmode)
525 extern enum prog_mode_type arm_prgmode;
527 /* What sort of floating point unit do we have? Hardware or software.
528 If software, is it issue 2 or issue 3? */
529 enum floating_point_type
536 /* Recast the floating point class to be the floating point attribute. */
537 #define arm_fpu_attr ((enum attr_fpu) arm_fpu)
539 /* What type of floating point to tune for */
540 extern enum floating_point_type arm_fpu;
542 /* What type of floating point instructions are available */
543 extern enum floating_point_type arm_fpu_arch;
545 /* Default floating point architecture. Override in sub-target if
548 #define FP_DEFAULT FP_SOFT2
551 /* Nonzero if the processor has a fast multiply insn, and one that does
552 a 64-bit multiply of two 32-bit values. */
553 extern int arm_fast_multiply;
555 /* Nonzero if this chip supports the ARM Architecture 4 extensions */
556 extern int arm_arch4;
558 /* Nonzero if this chip supports the ARM Architecture 5 extensions */
559 extern int arm_arch5;
561 /* Nonzero if this chip supports the ARM Architecture 5E extensions */
562 extern int arm_arch5e;
564 /* Nonzero if this chip can benefit from load scheduling. */
565 extern int arm_ld_sched;
567 /* Nonzero if generating thumb code. */
568 extern int thumb_code;
570 /* Nonzero if this chip is a StrongARM. */
571 extern int arm_is_strong;
573 /* Nonzero if this chip is an XScale. */
574 extern int arm_is_xscale;
576 /* Nonzero if this chip is an ARM6 or an ARM7. */
577 extern int arm_is_6_or_7;
579 #ifndef TARGET_DEFAULT
580 #define TARGET_DEFAULT (ARM_FLAG_APCS_FRAME)
583 /* The frame pointer register used in gcc has nothing to do with debugging;
584 that is controlled by the APCS-FRAME option. */
585 #define CAN_DEBUG_WITHOUT_FP
587 #undef TARGET_MEM_FUNCTIONS
588 #define TARGET_MEM_FUNCTIONS 1
590 #define OVERRIDE_OPTIONS arm_override_options ()
592 /* Nonzero if PIC code requires explicit qualifiers to generate
593 PLT and GOT relocs rather than the assembler doing so implicitly.
594 Subtargets can override these if required. */
595 #ifndef NEED_GOT_RELOC
596 #define NEED_GOT_RELOC 0
598 #ifndef NEED_PLT_RELOC
599 #define NEED_PLT_RELOC 0
602 /* Nonzero if we need to refer to the GOT with a PC-relative
603 offset. In other words, generate
605 .word _GLOBAL_OFFSET_TABLE_ - [. - (.Lxx + 8)]
609 .word _GLOBAL_OFFSET_TABLE_ - (.Lxx + 8)
611 The default is true, which matches NetBSD. Subtargets can
612 override this if required. */
617 /* Target machine storage Layout. */
620 /* Define this macro if it is advisable to hold scalars in registers
621 in a wider mode than that declared by the program. In such cases,
622 the value is constrained to be within the bounds of the declared
623 type, but kept valid in the wider mode. The signedness of the
624 extension may differ from that of the type. */
626 /* It is far faster to zero extend chars than to sign extend them */
628 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
629 if (GET_MODE_CLASS (MODE) == MODE_INT \
630 && GET_MODE_SIZE (MODE) < 4) \
632 if (MODE == QImode) \
634 else if (MODE == HImode) \
635 UNSIGNEDP = TARGET_MMU_TRAPS != 0; \
639 /* Define this macro if the promotion described by `PROMOTE_MODE'
640 should also be done for outgoing function arguments. */
641 /* This is required to ensure that push insns always push a word. */
642 #define PROMOTE_FUNCTION_ARGS
645 I think I have added all the code to make this work. Unfortunately,
646 early releases of the floating point emulation code on RISCiX used a
647 different format for extended precision numbers. On my RISCiX box there
648 is a bug somewhere which causes the machine to lock up when running enquire
649 with long doubles. There is the additional aspect that Norcroft C
650 treats long doubles as doubles and we ought to remain compatible.
651 Perhaps someone with an FPA coprocessor and not running RISCiX would like
652 to try this someday. */
653 /* #define LONG_DOUBLE_TYPE_SIZE 96 */
655 /* Disable XFmode patterns in md file */
656 #define ENABLE_XF_PATTERNS 0
658 /* Define this if most significant bit is lowest numbered
659 in instructions that operate on numbered bit-fields. */
660 #define BITS_BIG_ENDIAN 0
662 /* Define this if most significant byte of a word is the lowest numbered.
663 Most ARM processors are run in little endian mode, so that is the default.
664 If you want to have it run-time selectable, change the definition in a
665 cover file to be TARGET_BIG_ENDIAN. */
666 #define BYTES_BIG_ENDIAN (TARGET_BIG_END != 0)
668 /* Define this if most significant word of a multiword number is the lowest
670 This is always false, even when in big-endian mode. */
671 #define WORDS_BIG_ENDIAN (BYTES_BIG_ENDIAN && ! TARGET_LITTLE_WORDS)
673 /* LIBGCC2_WORDS_BIG_ENDIAN has to be a constant, so we define this based
674 on processor pre-defineds when compiling libgcc2.c. */
675 #if defined(__ARMEB__) && !defined(__ARMWEL__)
676 #define LIBGCC2_WORDS_BIG_ENDIAN 1
678 #define LIBGCC2_WORDS_BIG_ENDIAN 0
681 /* Define this if most significant word of doubles is the lowest numbered.
682 The rules are different based on whether or not we use FPA-format or
683 VFP-format doubles. */
684 #define FLOAT_WORDS_BIG_ENDIAN (arm_float_words_big_endian ())
686 #define UNITS_PER_WORD 4
688 #define PARM_BOUNDARY 32
690 #define STACK_BOUNDARY 32
692 #define FUNCTION_BOUNDARY 32
694 /* The lowest bit is used to indicate Thumb-mode functions, so the
695 vbit must go into the delta field of pointers to member
697 #define TARGET_PTRMEMFUNC_VBIT_LOCATION ptrmemfunc_vbit_in_delta
699 #define EMPTY_FIELD_BOUNDARY 32
701 #define BIGGEST_ALIGNMENT 32
703 /* Make strings word-aligned so strcpy from constants will be faster. */
704 #define CONSTANT_ALIGNMENT_FACTOR (TARGET_THUMB || ! arm_is_xscale ? 1 : 2)
706 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \
707 ((TREE_CODE (EXP) == STRING_CST \
708 && (ALIGN) < BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR) \
709 ? BITS_PER_WORD * CONSTANT_ALIGNMENT_FACTOR : (ALIGN))
711 /* Setting STRUCTURE_SIZE_BOUNDARY to 32 produces more efficient code, but the
712 value set in previous versions of this toolchain was 8, which produces more
713 compact structures. The command line option -mstructure_size_boundary=<n>
714 can be used to change this value. For compatibility with the ARM SDK
715 however the value should be left at 32. ARM SDT Reference Manual (ARM DUI
716 0020D) page 2-20 says "Structures are aligned on word boundaries". */
717 #define STRUCTURE_SIZE_BOUNDARY arm_structure_size_boundary
718 extern int arm_structure_size_boundary;
720 /* This is the value used to initialise arm_structure_size_boundary. If a
721 particular arm target wants to change the default value it should change
722 the definition of this macro, not STRUCTRUE_SIZE_BOUNDARY. See netbsd.h
723 for an example of this. */
724 #ifndef DEFAULT_STRUCTURE_SIZE_BOUNDARY
725 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 32
728 /* Used when parsing command line option -mstructure_size_boundary. */
729 extern const char * structure_size_string;
731 /* Non-zero if move instructions will actually fail to work
732 when given unaligned data. */
733 #define STRICT_ALIGNMENT 1
735 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
738 /* Standard register usage. */
740 /* Register allocation in ARM Procedure Call Standard (as used on RISCiX):
741 (S - saved over call).
743 r0 * argument word/integer result
746 r4-r8 S register variable
747 r9 S (rfp) register variable (real frame pointer)
749 r10 F S (sl) stack limit (used by -mapcs-stack-check)
750 r11 F S (fp) argument pointer
751 r12 (ip) temp workspace
752 r13 F S (sp) lower end of current stack frame
753 r14 (lr) link address/workspace
754 r15 F (pc) program counter
756 f0 floating point result
757 f1-f3 floating point scratch
759 f4-f7 S floating point variable
761 cc This is NOT a real register, but is used internally
762 to represent things that use or set the condition
764 sfp This isn't either. It is used during rtl generation
765 since the offset between the frame pointer and the
766 auto's isn't known until after register allocation.
767 afp Nor this, we only need this because of non-local
768 goto. Without it fp appears to be used and the
769 elimination code won't get rid of sfp. It tracks
770 fp exactly at all times.
772 *: See CONDITIONAL_REGISTER_USAGE */
774 /* The stack backtrace structure is as follows:
775 fp points to here: | save code pointer | [fp]
776 | return link value | [fp, #-4]
777 | return sp value | [fp, #-8]
778 | return fp value | [fp, #-12]
779 [| saved r10 value |]
790 [| saved f7 value |] three words
791 [| saved f6 value |] three words
792 [| saved f5 value |] three words
793 [| saved f4 value |] three words
794 r0-r3 are not normally saved in a C function. */
796 /* 1 for registers that have pervasive standard uses
797 and are not available for the register allocator. */
798 #define FIXED_REGISTERS \
806 /* 1 for registers not available across function calls.
807 These must include the FIXED_REGISTERS and also any
808 registers that can be used without being saved.
809 The latter must include the registers where values are returned
810 and the register where structure-value addresses are passed.
811 Aside from that, you can include as many other registers as you like.
812 The CC is not preserved over function calls on the ARM 6, so it is
813 easier to assume this for all. SFP is preserved, since FP is. */
814 #define CALL_USED_REGISTERS \
822 #ifndef SUBTARGET_CONDITIONAL_REGISTER_USAGE
823 #define SUBTARGET_CONDITIONAL_REGISTER_USAGE
826 #define CONDITIONAL_REGISTER_USAGE \
830 if (TARGET_SOFT_FLOAT || TARGET_THUMB) \
832 for (regno = FIRST_ARM_FP_REGNUM; \
833 regno <= LAST_ARM_FP_REGNUM; ++regno) \
834 fixed_regs[regno] = call_used_regs[regno] = 1; \
836 if (PIC_OFFSET_TABLE_REGNUM != INVALID_REGNUM) \
838 fixed_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
839 call_used_regs[PIC_OFFSET_TABLE_REGNUM] = 1; \
841 else if (TARGET_APCS_STACK) \
843 fixed_regs[10] = 1; \
844 call_used_regs[10] = 1; \
846 if (TARGET_APCS_FRAME) \
848 fixed_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
849 call_used_regs[ARM_HARD_FRAME_POINTER_REGNUM] = 1; \
851 SUBTARGET_CONDITIONAL_REGISTER_USAGE \
854 /* These are a couple of extensions to the formats accecpted
856 %@ prints out ASM_COMMENT_START
857 %r prints out REGISTER_PREFIX reg_names[arg] */
858 #define ASM_FPRINTF_EXTENSIONS(FILE, ARGS, P) \
860 fputs (ASM_COMMENT_START, FILE); \
864 fputs (REGISTER_PREFIX, FILE); \
865 fputs (reg_names [va_arg (ARGS, int)], FILE); \
868 /* Round X up to the nearest word. */
869 #define ROUND_UP(X) (((X) + 3) & ~3)
871 /* Convert fron bytes to ints. */
872 #define ARM_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
874 /* The number of (integer) registers required to hold a quantity of type MODE. */
875 #define ARM_NUM_REGS(MODE) \
876 ARM_NUM_INTS (GET_MODE_SIZE (MODE))
878 /* The number of (integer) registers required to hold a quantity of TYPE MODE. */
879 #define ARM_NUM_REGS2(MODE, TYPE) \
880 ARM_NUM_INTS ((MODE) == BLKmode ? \
881 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE))
883 /* The number of (integer) argument register available. */
884 #define NUM_ARG_REGS 4
886 /* Return the regiser number of the N'th (integer) argument. */
887 #define ARG_REGISTER(N) (N - 1)
889 #if 0 /* FIXME: The ARM backend has special code to handle structure
890 returns, and will reserve its own hidden first argument. So
891 if this macro is enabled a *second* hidden argument will be
892 reserved, which will break binary compatibility with old
893 toolchains and also thunk handling. One day this should be
895 /* RTX for structure returns. NULL means use a hidden first argument. */
896 #define STRUCT_VALUE 0
898 /* Register in which address to store a structure value
899 is passed to a function. */
900 #define STRUCT_VALUE_REGNUM ARG_REGISTER (1)
903 /* Specify the registers used for certain standard purposes.
904 The values of these macros are register numbers. */
906 /* The number of the last argument register. */
907 #define LAST_ARG_REGNUM ARG_REGISTER (NUM_ARG_REGS)
909 /* The number of the last "lo" register (thumb). */
910 #define LAST_LO_REGNUM 7
912 /* The register that holds the return address in exception handlers. */
913 #define EXCEPTION_LR_REGNUM 2
915 /* The native (Norcroft) Pascal compiler for the ARM passes the static chain
916 as an invisible last argument (possible since varargs don't exist in
917 Pascal), so the following is not true. */
918 #define STATIC_CHAIN_REGNUM (TARGET_ARM ? 12 : 9)
920 /* Define this to be where the real frame pointer is if it is not possible to
921 work out the offset between the frame pointer and the automatic variables
922 until after register allocation has taken place. FRAME_POINTER_REGNUM
923 should point to a special register that we will make sure is eliminated.
925 For the Thumb we have another problem. The TPCS defines the frame pointer
926 as r11, and GCC belives that it is always possible to use the frame pointer
927 as base register for addressing purposes. (See comments in
928 find_reloads_address()). But - the Thumb does not allow high registers,
929 including r11, to be used as base address registers. Hence our problem.
931 The solution used here, and in the old thumb port is to use r7 instead of
932 r11 as the hard frame pointer and to have special code to generate
933 backtrace structures on the stack (if required to do so via a command line
934 option) using r11. This is the only 'user visable' use of r11 as a frame
936 #define ARM_HARD_FRAME_POINTER_REGNUM 11
937 #define THUMB_HARD_FRAME_POINTER_REGNUM 7
939 #define HARD_FRAME_POINTER_REGNUM \
941 ? ARM_HARD_FRAME_POINTER_REGNUM \
942 : THUMB_HARD_FRAME_POINTER_REGNUM)
944 #define FP_REGNUM HARD_FRAME_POINTER_REGNUM
946 /* Register to use for pushing function arguments. */
947 #define STACK_POINTER_REGNUM SP_REGNUM
949 /* ARM floating pointer registers. */
950 #define FIRST_ARM_FP_REGNUM 16
951 #define LAST_ARM_FP_REGNUM 23
953 /* Base register for access to local variables of the function. */
954 #define FRAME_POINTER_REGNUM 25
956 /* Base register for access to arguments of the function. */
957 #define ARG_POINTER_REGNUM 26
959 /* The number of hard registers is 16 ARM + 8 FPU + 1 CC + 1 SFP. */
960 #define FIRST_PSEUDO_REGISTER 27
962 /* Value should be nonzero if functions must have frame pointers.
963 Zero means the frame pointer need not be set up (and parms may be accessed
964 via the stack pointer) in functions that seem suitable.
965 If we have to have a frame pointer we might as well make use of it.
966 APCS says that the frame pointer does not need to be pushed in leaf
967 functions, or simple tail call functions. */
968 #define FRAME_POINTER_REQUIRED \
969 (current_function_has_nonlocal_label \
970 || (TARGET_ARM && TARGET_APCS_FRAME && ! leaf_function_p ()))
972 /* Return number of consecutive hard regs needed starting at reg REGNO
973 to hold something of mode MODE.
974 This is ordinarily the length in words of a value of mode MODE
975 but can be less for certain modes in special long registers.
977 On the ARM regs are UNITS_PER_WORD bits wide; FPU regs can hold any FP
979 #define HARD_REGNO_NREGS(REGNO, MODE) \
981 && REGNO >= FIRST_ARM_FP_REGNUM \
982 && REGNO != FRAME_POINTER_REGNUM \
983 && REGNO != ARG_POINTER_REGNUM) \
984 ? 1 : ARM_NUM_REGS (MODE))
986 /* Return true if REGNO is suitable for holding a quantity of type MODE. */
987 #define HARD_REGNO_MODE_OK(REGNO, MODE) \
988 arm_hard_regno_mode_ok ((REGNO), (MODE))
990 /* Value is 1 if it is a good idea to tie two pseudo registers
991 when one has mode MODE1 and one has mode MODE2.
992 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
993 for any hard reg, then this must be 0 for correct output. */
994 #define MODES_TIEABLE_P(MODE1, MODE2) \
995 (GET_MODE_CLASS (MODE1) == GET_MODE_CLASS (MODE2))
997 /* The order in which register should be allocated. It is good to use ip
998 since no saving is required (though calls clobber it) and it never contains
999 function parameters. It is quite good to use lr since other calls may
1000 clobber it anyway. Allocate r0 through r3 in reverse order since r3 is
1001 least likely to contain a function parameter; in addition results are
1003 #define REG_ALLOC_ORDER \
1005 3, 2, 1, 0, 12, 14, 4, 5, \
1006 6, 7, 8, 10, 9, 11, 13, 15, \
1007 16, 17, 18, 19, 20, 21, 22, 23, \
1011 /* Interrupt functions can only use registers that have already been
1012 saved by the prologue, even if they would normally be
1014 #define HARD_REGNO_RENAME_OK(SRC, DST) \
1015 (! IS_INTERRUPT (cfun->machine->func_type) || \
1016 regs_ever_live[DST])
1018 /* Register and constant classes. */
1020 /* Register classes: used to be simple, just all ARM regs or all FPU regs
1021 Now that the Thumb is involved it has become more complicated. */
1036 #define N_REG_CLASSES (int) LIM_REG_CLASSES
1038 /* Give names of register classes as strings for dump file. */
1039 #define REG_CLASS_NAMES \
1052 /* Define which registers fit in which classes.
1053 This is an initializer for a vector of HARD_REG_SET
1054 of length N_REG_CLASSES. */
1055 #define REG_CLASS_CONTENTS \
1057 { 0x0000000 }, /* NO_REGS */ \
1058 { 0x0FF0000 }, /* FPU_REGS */ \
1059 { 0x00000FF }, /* LO_REGS */ \
1060 { 0x0002000 }, /* STACK_REG */ \
1061 { 0x00020FF }, /* BASE_REGS */ \
1062 { 0x000FF00 }, /* HI_REGS */ \
1063 { 0x1000000 }, /* CC_REG */ \
1064 { 0x200FFFF }, /* GENERAL_REGS */ \
1065 { 0x2FFFFFF } /* ALL_REGS */ \
1068 /* The same information, inverted:
1069 Return the class number of the smallest class containing
1070 reg number REGNO. This could be a conditional expression
1071 or could index an array. */
1072 #define REGNO_REG_CLASS(REGNO) arm_regno_class (REGNO)
1074 /* The class value for index registers, and the one for base regs. */
1075 #define INDEX_REG_CLASS (TARGET_THUMB ? LO_REGS : GENERAL_REGS)
1076 #define BASE_REG_CLASS (TARGET_THUMB ? BASE_REGS : GENERAL_REGS)
1078 /* For the Thumb the high registers cannot be used as base
1079 registers when addressing quanitities in QI or HI mode. */
1080 #define MODE_BASE_REG_CLASS(MODE) \
1081 (TARGET_ARM ? BASE_REGS : \
1082 (((MODE) == QImode || (MODE) == HImode || (MODE) == VOIDmode) \
1083 ? LO_REGS : BASE_REGS))
1085 /* When SMALL_REGISTER_CLASSES is nonzero, the compiler allows
1086 registers explicitly used in the rtl to be used as spill registers
1087 but prevents the compiler from extending the lifetime of these
1089 #define SMALL_REGISTER_CLASSES TARGET_THUMB
1091 /* Get reg_class from a letter such as appears in the machine description.
1092 We only need constraint `f' for FPU_REGS (`r' == GENERAL_REGS) for the
1093 ARM, but several more letters for the Thumb. */
1094 #define REG_CLASS_FROM_LETTER(C) \
1095 ( (C) == 'f' ? FPU_REGS \
1096 : (C) == 'l' ? (TARGET_ARM ? GENERAL_REGS : LO_REGS) \
1097 : TARGET_ARM ? NO_REGS \
1098 : (C) == 'h' ? HI_REGS \
1099 : (C) == 'b' ? BASE_REGS \
1100 : (C) == 'k' ? STACK_REG \
1101 : (C) == 'c' ? CC_REG \
1104 /* The letters I, J, K, L and M in a register constraint string
1105 can be used to stand for particular ranges of immediate operands.
1106 This macro defines what the ranges are.
1107 C is the letter, and VALUE is a constant value.
1108 Return 1 if VALUE is in the range specified by C.
1109 I: immediate arithmetic operand (i.e. 8 bits shifted as required).
1110 J: valid indexing constants.
1111 K: ~value ok in rhs argument of data operand.
1112 L: -value ok in rhs argument of data operand.
1113 M: 0..32, or a power of 2 (for shifts, or mult done by shift). */
1114 #define CONST_OK_FOR_ARM_LETTER(VALUE, C) \
1115 ((C) == 'I' ? const_ok_for_arm (VALUE) : \
1116 (C) == 'J' ? ((VALUE) < 4096 && (VALUE) > -4096) : \
1117 (C) == 'K' ? (const_ok_for_arm (~(VALUE))) : \
1118 (C) == 'L' ? (const_ok_for_arm (-(VALUE))) : \
1119 (C) == 'M' ? (((VALUE >= 0 && VALUE <= 32)) \
1120 || (((VALUE) & ((VALUE) - 1)) == 0)) \
1123 #define CONST_OK_FOR_THUMB_LETTER(VAL, C) \
1124 ((C) == 'I' ? (unsigned HOST_WIDE_INT) (VAL) < 256 : \
1125 (C) == 'J' ? (VAL) > -256 && (VAL) < 0 : \
1126 (C) == 'K' ? thumb_shiftable_const (VAL) : \
1127 (C) == 'L' ? (VAL) > -8 && (VAL) < 8 : \
1128 (C) == 'M' ? ((unsigned HOST_WIDE_INT) (VAL) < 1024 \
1129 && ((VAL) & 3) == 0) : \
1130 (C) == 'N' ? ((unsigned HOST_WIDE_INT) (VAL) < 32) : \
1131 (C) == 'O' ? ((VAL) >= -508 && (VAL) <= 508) \
1134 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
1136 CONST_OK_FOR_ARM_LETTER (VALUE, C) : CONST_OK_FOR_THUMB_LETTER (VALUE, C))
1138 /* Constant letter 'G' for the FPU immediate constants.
1139 'H' means the same constant negated. */
1140 #define CONST_DOUBLE_OK_FOR_ARM_LETTER(X, C) \
1141 ((C) == 'G' ? const_double_rtx_ok_for_fpu (X) : \
1142 (C) == 'H' ? neg_const_double_rtx_ok_for_fpu (X) : 0)
1144 #define CONST_DOUBLE_OK_FOR_LETTER_P(X, C) \
1146 CONST_DOUBLE_OK_FOR_ARM_LETTER (X, C) : 0)
1148 /* For the ARM, `Q' means that this is a memory operand that is just
1149 an offset from a register.
1150 `S' means any symbol that has the SYMBOL_REF_FLAG set or a CONSTANT_POOL
1151 address. This means that the symbol is in the text segment and can be
1152 accessed without using a load. */
1154 #define EXTRA_CONSTRAINT_ARM(OP, C) \
1155 ((C) == 'Q' ? GET_CODE (OP) == MEM && GET_CODE (XEXP (OP, 0)) == REG : \
1156 (C) == 'R' ? (GET_CODE (OP) == MEM \
1157 && GET_CODE (XEXP (OP, 0)) == SYMBOL_REF \
1158 && CONSTANT_POOL_ADDRESS_P (XEXP (OP, 0))) : \
1159 (C) == 'S' ? (optimize > 0 && CONSTANT_ADDRESS_P (OP)) \
1162 #define EXTRA_CONSTRAINT_THUMB(X, C) \
1163 ((C) == 'Q' ? (GET_CODE (X) == MEM \
1164 && GET_CODE (XEXP (X, 0)) == LABEL_REF) : 0)
1166 #define EXTRA_CONSTRAINT(X, C) \
1168 EXTRA_CONSTRAINT_ARM (X, C) : EXTRA_CONSTRAINT_THUMB (X, C))
1170 /* Given an rtx X being reloaded into a reg required to be
1171 in class CLASS, return the class of reg to actually use.
1172 In general this is just CLASS, but for the Thumb we prefer
1173 a LO_REGS class or a subset. */
1174 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
1175 (TARGET_ARM ? (CLASS) : \
1176 ((CLASS) == BASE_REGS ? (CLASS) : LO_REGS))
1178 /* Must leave BASE_REGS reloads alone */
1179 #define THUMB_SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1180 ((CLASS) != LO_REGS && (CLASS) != BASE_REGS \
1181 ? ((true_regnum (X) == -1 ? LO_REGS \
1182 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1186 #define THUMB_SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1187 ((CLASS) != LO_REGS \
1188 ? ((true_regnum (X) == -1 ? LO_REGS \
1189 : (true_regnum (X) + HARD_REGNO_NREGS (0, MODE) > 8) ? LO_REGS \
1193 /* Return the register class of a scratch register needed to copy IN into
1194 or out of a register in CLASS in MODE. If it can be done directly,
1195 NO_REGS is returned. */
1196 #define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \
1198 (((MODE) == HImode && ! arm_arch4 && true_regnum (X) == -1) \
1199 ? GENERAL_REGS : NO_REGS) \
1200 : THUMB_SECONDARY_OUTPUT_RELOAD_CLASS (CLASS, MODE, X))
1202 /* If we need to load shorts byte-at-a-time, then we need a scratch. */
1203 #define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \
1205 (((MODE) == HImode && ! arm_arch4 && TARGET_MMU_TRAPS \
1206 && (GET_CODE (X) == MEM \
1207 || ((GET_CODE (X) == REG || GET_CODE (X) == SUBREG) \
1208 && true_regnum (X) == -1))) \
1209 ? GENERAL_REGS : NO_REGS) \
1210 : THUMB_SECONDARY_INPUT_RELOAD_CLASS (CLASS, MODE, X))
1212 /* Try a machine-dependent way of reloading an illegitimate address
1213 operand. If we find one, push the reload and jump to WIN. This
1214 macro is used in only one place: `find_reloads_address' in reload.c.
1216 For the ARM, we wish to handle large displacements off a base
1217 register by splitting the addend across a MOV and the mem insn.
1218 This can cut the number of reloads needed. */
1219 #define ARM_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND, WIN) \
1222 if (GET_CODE (X) == PLUS \
1223 && GET_CODE (XEXP (X, 0)) == REG \
1224 && REGNO (XEXP (X, 0)) < FIRST_PSEUDO_REGISTER \
1225 && REG_MODE_OK_FOR_BASE_P (XEXP (X, 0), MODE) \
1226 && GET_CODE (XEXP (X, 1)) == CONST_INT) \
1228 HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
1229 HOST_WIDE_INT low, high; \
1231 if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \
1232 low = ((val & 0xf) ^ 0x8) - 0x8; \
1233 else if (MODE == SImode \
1234 || (MODE == SFmode && TARGET_SOFT_FLOAT) \
1235 || ((MODE == HImode || MODE == QImode) && ! arm_arch4)) \
1236 /* Need to be careful, -4096 is not a valid offset. */ \
1237 low = val >= 0 ? (val & 0xfff) : -((-val) & 0xfff); \
1238 else if ((MODE == HImode || MODE == QImode) && arm_arch4) \
1239 /* Need to be careful, -256 is not a valid offset. */ \
1240 low = val >= 0 ? (val & 0xff) : -((-val) & 0xff); \
1241 else if (GET_MODE_CLASS (MODE) == MODE_FLOAT \
1242 && TARGET_HARD_FLOAT) \
1243 /* Need to be careful, -1024 is not a valid offset. */ \
1244 low = val >= 0 ? (val & 0x3ff) : -((-val) & 0x3ff); \
1248 high = ((((val - low) & (unsigned HOST_WIDE_INT) 0xffffffff) \
1249 ^ (unsigned HOST_WIDE_INT) 0x80000000) \
1250 - (unsigned HOST_WIDE_INT) 0x80000000); \
1251 /* Check for overflow or zero */ \
1252 if (low == 0 || high == 0 || (high + low != val)) \
1255 /* Reload the high part into a base reg; leave the low part \
1257 X = gen_rtx_PLUS (GET_MODE (X), \
1258 gen_rtx_PLUS (GET_MODE (X), XEXP (X, 0), \
1261 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1262 MODE_BASE_REG_CLASS (MODE), GET_MODE (X), \
1263 VOIDmode, 0, 0, OPNUM, TYPE); \
1269 /* ??? If an HImode FP+large_offset address is converted to an HImode
1270 SP+large_offset address, then reload won't know how to fix it. It sees
1271 only that SP isn't valid for HImode, and so reloads the SP into an index
1272 register, but the resulting address is still invalid because the offset
1273 is too big. We fix it here instead by reloading the entire address. */
1274 /* We could probably achieve better results by defining PROMOTE_MODE to help
1275 cope with the variances between the Thumb's signed and unsigned byte and
1276 halfword load instructions. */
1277 #define THUMB_LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1279 if (GET_CODE (X) == PLUS \
1280 && GET_MODE_SIZE (MODE) < 4 \
1281 && GET_CODE (XEXP (X, 0)) == REG \
1282 && XEXP (X, 0) == stack_pointer_rtx \
1283 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1284 && ! THUMB_LEGITIMATE_OFFSET (MODE, INTVAL (XEXP (X, 1)))) \
1288 push_reload (orig_X, NULL_RTX, &X, NULL, \
1289 MODE_BASE_REG_CLASS (MODE), \
1290 Pmode, VOIDmode, 0, 0, OPNUM, TYPE); \
1295 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1297 ARM_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN); \
1299 THUMB_LEGITIMIZE_RELOAD_ADDRESS (X, MODE, OPNUM, TYPE, IND_LEVELS, WIN)
1301 /* Return the maximum number of consecutive registers
1302 needed to represent mode MODE in a register of class CLASS.
1303 ARM regs are UNITS_PER_WORD bits while FPU regs can hold any FP mode */
1304 #define CLASS_MAX_NREGS(CLASS, MODE) \
1305 ((CLASS) == FPU_REGS ? 1 : ARM_NUM_REGS (MODE))
1307 /* Moves between FPU_REGS and GENERAL_REGS are two memory insns. */
1308 #define REGISTER_MOVE_COST(MODE, FROM, TO) \
1310 ((FROM) == FPU_REGS && (TO) != FPU_REGS ? 20 : \
1311 (FROM) != FPU_REGS && (TO) == FPU_REGS ? 20 : 2) \
1313 ((FROM) == HI_REGS || (TO) == HI_REGS) ? 4 : 2)
1315 /* Stack layout; function entry, exit and calling. */
1317 /* Define this if pushing a word on the stack
1318 makes the stack pointer a smaller address. */
1319 #define STACK_GROWS_DOWNWARD 1
1321 /* Define this if the nominal address of the stack frame
1322 is at the high-address end of the local variables;
1323 that is, each additional local variable allocated
1324 goes at a more negative offset in the frame. */
1325 #define FRAME_GROWS_DOWNWARD 1
1327 /* Offset within stack frame to start allocating local variables at.
1328 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
1329 first local allocated. Otherwise, it is the offset to the BEGINNING
1330 of the first local allocated. */
1331 #define STARTING_FRAME_OFFSET 0
1333 /* If we generate an insn to push BYTES bytes,
1334 this says how many the stack pointer really advances by. */
1335 /* The push insns do not do this rounding implicitly.
1336 So don't define this. */
1337 /* #define PUSH_ROUNDING(NPUSHED) ROUND_UP (NPUSHED) */
1339 /* Define this if the maximum size of all the outgoing args is to be
1340 accumulated and pushed during the prologue. The amount can be
1341 found in the variable current_function_outgoing_args_size. */
1342 #define ACCUMULATE_OUTGOING_ARGS 1
1344 /* Offset of first parameter from the argument pointer register value. */
1345 #define FIRST_PARM_OFFSET(FNDECL) (TARGET_ARM ? 4 : 0)
1347 /* Value is the number of byte of arguments automatically
1348 popped when returning from a subroutine call.
1349 FUNDECL is the declaration node of the function (as a tree),
1350 FUNTYPE is the data type of the function (as a tree),
1351 or for a library call it is an identifier node for the subroutine name.
1352 SIZE is the number of bytes of arguments passed on the stack.
1354 On the ARM, the caller does not pop any of its arguments that were passed
1356 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, SIZE) 0
1358 /* Define how to find the value returned by a library function
1359 assuming the value has mode MODE. */
1360 #define LIBCALL_VALUE(MODE) \
1361 (TARGET_ARM && TARGET_HARD_FLOAT && GET_MODE_CLASS (MODE) == MODE_FLOAT \
1362 ? gen_rtx_REG (MODE, FIRST_ARM_FP_REGNUM) \
1363 : gen_rtx_REG (MODE, ARG_REGISTER (1)))
1365 /* Define how to find the value returned by a function.
1366 VALTYPE is the data type of the value (as a tree).
1367 If the precise function being called is known, FUNC is its FUNCTION_DECL;
1368 otherwise, FUNC is 0. */
1369 #define FUNCTION_VALUE(VALTYPE, FUNC) \
1370 LIBCALL_VALUE (TYPE_MODE (VALTYPE))
1372 /* 1 if N is a possible register number for a function value.
1373 On the ARM, only r0 and f0 can return results. */
1374 #define FUNCTION_VALUE_REGNO_P(REGNO) \
1375 ((REGNO) == ARG_REGISTER (1) \
1376 || (TARGET_ARM && ((REGNO) == FIRST_ARM_FP_REGNUM) && TARGET_HARD_FLOAT))
1378 /* How large values are returned */
1379 /* A C expression which can inhibit the returning of certain function values
1380 in registers, based on the type of value. */
1381 #define RETURN_IN_MEMORY(TYPE) arm_return_in_memory (TYPE)
1383 /* Define DEFAULT_PCC_STRUCT_RETURN to 1 if all structure and union return
1384 values must be in memory. On the ARM, they need only do so if larger
1385 than a word, or if they contain elements offset from zero in the struct. */
1386 #define DEFAULT_PCC_STRUCT_RETURN 0
1388 /* Flags for the call/call_value rtl operations set up by function_arg. */
1389 #define CALL_NORMAL 0x00000000 /* No special processing. */
1390 #define CALL_LONG 0x00000001 /* Always call indirect. */
1391 #define CALL_SHORT 0x00000002 /* Never call indirect. */
1393 /* These bits describe the different types of function supported
1394 by the ARM backend. They are exclusive. ie a function cannot be both a
1395 normal function and an interworked function, for example. Knowing the
1396 type of a function is important for determining its prologue and
1398 Note value 7 is currently unassigned. Also note that the interrupt
1399 function types all have bit 2 set, so that they can be tested for easily.
1400 Note that 0 is deliberately chosen for ARM_FT_UNKNOWN so that when the
1401 machine_function structure is initialised (to zero) func_type will
1402 default to unknown. This will force the first use of arm_current_func_type
1403 to call arm_compute_func_type. */
1404 #define ARM_FT_UNKNOWN 0 /* Type has not yet been determined. */
1405 #define ARM_FT_NORMAL 1 /* Your normal, straightforward function. */
1406 #define ARM_FT_INTERWORKED 2 /* A function that supports interworking. */
1407 #define ARM_FT_EXCEPTION_HANDLER 3 /* A C++ exception handler. */
1408 #define ARM_FT_ISR 4 /* An interrupt service routine. */
1409 #define ARM_FT_FIQ 5 /* A fast interrupt service routine. */
1410 #define ARM_FT_EXCEPTION 6 /* An ARM exception handler (subcase of ISR). */
1412 #define ARM_FT_TYPE_MASK ((1 << 3) - 1)
1414 /* In addition functions can have several type modifiers,
1415 outlined by these bit masks: */
1416 #define ARM_FT_INTERRUPT (1 << 2) /* Note overlap with FT_ISR and above. */
1417 #define ARM_FT_NAKED (1 << 3) /* No prologue or epilogue. */
1418 #define ARM_FT_VOLATILE (1 << 4) /* Does not return. */
1419 #define ARM_FT_NESTED (1 << 5) /* Embedded inside another func. */
1421 /* Some macros to test these flags. */
1422 #define ARM_FUNC_TYPE(t) (t & ARM_FT_TYPE_MASK)
1423 #define IS_INTERRUPT(t) (t & ARM_FT_INTERRUPT)
1424 #define IS_VOLATILE(t) (t & ARM_FT_VOLATILE)
1425 #define IS_NAKED(t) (t & ARM_FT_NAKED)
1426 #define IS_NESTED(t) (t & ARM_FT_NESTED)
1428 /* A C structure for machine-specific, per-function data.
1429 This is added to the cfun structure. */
1430 typedef struct machine_function GTY(())
1432 /* Additionsl stack adjustment in __builtin_eh_throw. */
1433 rtx eh_epilogue_sp_ofs;
1434 /* Records if LR has to be saved for far jumps. */
1436 /* Records if ARG_POINTER was ever live. */
1437 int arg_pointer_live;
1438 /* Records if the save of LR has been eliminated. */
1439 int lr_save_eliminated;
1440 /* Records the type of the current function. */
1441 unsigned long func_type;
1442 /* Record if the function has a variable argument list. */
1443 int uses_anonymous_args;
1447 /* A C type for declaring a variable that is used as the first argument of
1448 `FUNCTION_ARG' and other related values. For some target machines, the
1449 type `int' suffices and can hold the number of bytes of argument so far. */
1452 /* This is the number of registers of arguments scanned so far. */
1454 /* One of CALL_NORMAL, CALL_LONG or CALL_SHORT . */
1458 /* Define where to put the arguments to a function.
1459 Value is zero to push the argument on the stack,
1460 or a hard register in which to store the argument.
1462 MODE is the argument's machine mode.
1463 TYPE is the data type of the argument (as a tree).
1464 This is null for libcalls where that information may
1466 CUM is a variable of type CUMULATIVE_ARGS which gives info about
1467 the preceding args and about the function being called.
1468 NAMED is nonzero if this argument is a named parameter
1469 (otherwise it is an extra parameter matching an ellipsis).
1471 On the ARM, normally the first 16 bytes are passed in registers r0-r3; all
1472 other arguments are passed on the stack. If (NAMED == 0) (which happens
1473 only in assign_parms, since SETUP_INCOMING_VARARGS is defined), say it is
1474 passed in the stack (function_prologue will indeed make it pass in the
1475 stack if necessary). */
1476 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
1477 arm_function_arg (&(CUM), (MODE), (TYPE), (NAMED))
1479 /* For an arg passed partly in registers and partly in memory,
1480 this is the number of registers used.
1481 For args passed entirely in registers or entirely in memory, zero. */
1482 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
1483 ( NUM_ARG_REGS > (CUM).nregs \
1484 && (NUM_ARG_REGS < ((CUM).nregs + ARM_NUM_REGS2 (MODE, TYPE))) \
1485 ? NUM_ARG_REGS - (CUM).nregs : 0)
1487 /* Initialize a variable CUM of type CUMULATIVE_ARGS
1488 for a call to a function whose data type is FNTYPE.
1489 For a library call, FNTYPE is 0.
1490 On the ARM, the offset starts at 0. */
1491 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
1492 arm_init_cumulative_args (&(CUM), (FNTYPE), (LIBNAME), (INDIRECT))
1494 /* Update the data in CUM to advance over an argument
1495 of mode MODE and data type TYPE.
1496 (TYPE is null for libcalls where that information may not be available.) */
1497 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
1498 (CUM).nregs += ARM_NUM_REGS2 (MODE, TYPE)
1500 /* 1 if N is a possible register number for function argument passing.
1501 On the ARM, r0-r3 are used to pass args. */
1502 #define FUNCTION_ARG_REGNO_P(REGNO) (IN_RANGE ((REGNO), 0, 3))
1507 /* A C expression that evaluates to true if it is ok to perform a sibling
1509 #define FUNCTION_OK_FOR_SIBCALL(DECL) arm_function_ok_for_sibcall ((DECL))
1511 /* Perform any actions needed for a function that is receiving a variable
1512 number of arguments. CUM is as above. MODE and TYPE are the mode and type
1513 of the current parameter. PRETEND_SIZE is a variable that should be set to
1514 the amount of stack that must be pushed by the prolog to pretend that our
1517 Normally, this macro will push all remaining incoming registers on the
1518 stack and set PRETEND_SIZE to the length of the registers pushed.
1520 On the ARM, PRETEND_SIZE is set in order to have the prologue push the last
1521 named arg and all anonymous args onto the stack.
1522 XXX I know the prologue shouldn't be pushing registers, but it is faster
1524 #define SETUP_INCOMING_VARARGS(CUM, MODE, TYPE, PRETEND_SIZE, NO_RTL) \
1526 cfun->machine->uses_anonymous_args = 1; \
1527 if ((CUM).nregs < NUM_ARG_REGS) \
1528 (PRETEND_SIZE) = (NUM_ARG_REGS - (CUM).nregs) * UNITS_PER_WORD; \
1531 /* If your target environment doesn't prefix user functions with an
1532 underscore, you may wish to re-define this to prevent any conflicts.
1533 e.g. AOF may prefix mcount with an underscore. */
1534 #ifndef ARM_MCOUNT_NAME
1535 #define ARM_MCOUNT_NAME "*mcount"
1538 /* Call the function profiler with a given profile label. The Acorn
1539 compiler puts this BEFORE the prolog but gcc puts it afterwards.
1540 On the ARM the full profile code will look like:
1549 profile_function() in final.c outputs the .data section, FUNCTION_PROFILER
1550 will output the .text section.
1552 The ``mov ip,lr'' seems like a good idea to stick with cc convention.
1553 ``prof'' doesn't seem to mind about this! */
1554 #ifndef ARM_FUNCTION_PROFILER
1555 #define ARM_FUNCTION_PROFILER(STREAM, LABELNO) \
1560 asm_fprintf (STREAM, "\tmov\t%r, %r\n\tbl\t", \
1561 IP_REGNUM, LR_REGNUM); \
1562 assemble_name (STREAM, ARM_MCOUNT_NAME); \
1563 fputc ('\n', STREAM); \
1564 ASM_GENERATE_INTERNAL_LABEL (temp, "LP", LABELNO); \
1565 sym = gen_rtx (SYMBOL_REF, Pmode, temp); \
1566 assemble_aligned_integer (UNITS_PER_WORD, sym); \
1570 #ifndef THUMB_FUNCTION_PROFILER
1571 #define THUMB_FUNCTION_PROFILER(STREAM, LABELNO) \
1573 fprintf (STREAM, "\tmov\tip, lr\n"); \
1574 fprintf (STREAM, "\tbl\tmcount\n"); \
1575 fprintf (STREAM, "\t.word\tLP%d\n", LABELNO); \
1579 #define FUNCTION_PROFILER(STREAM, LABELNO) \
1581 ARM_FUNCTION_PROFILER (STREAM, LABELNO) \
1583 THUMB_FUNCTION_PROFILER (STREAM, LABELNO)
1585 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
1586 the stack pointer does not matter. The value is tested only in
1587 functions that have frame pointers.
1588 No definition is equivalent to always zero.
1590 On the ARM, the function epilogue recovers the stack pointer from the
1592 #define EXIT_IGNORE_STACK 1
1594 #define EPILOGUE_USES(REGNO) (reload_completed && (REGNO) == LR_REGNUM)
1596 /* Determine if the epilogue should be output as RTL.
1597 You should override this if you define FUNCTION_EXTRA_EPILOGUE. */
1598 #define USE_RETURN_INSN(ISCOND) \
1599 (TARGET_ARM ? use_return_insn (ISCOND) : 0)
1601 /* Definitions for register eliminations.
1603 This is an array of structures. Each structure initializes one pair
1604 of eliminable registers. The "from" register number is given first,
1605 followed by "to". Eliminations of the same "from" register are listed
1606 in order of preference.
1608 We have two registers that can be eliminated on the ARM. First, the
1609 arg pointer register can often be eliminated in favor of the stack
1610 pointer register. Secondly, the pseudo frame pointer register can always
1611 be eliminated; it is replaced with either the stack or the real frame
1612 pointer. Note we have to use {ARM|THUMB}_HARD_FRAME_POINTER_REGNUM
1613 because the definition of HARD_FRAME_POINTER_REGNUM is not a constant. */
1615 #define ELIMINABLE_REGS \
1616 {{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM },\
1617 { ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM },\
1618 { ARG_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
1619 { ARG_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM },\
1620 { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM },\
1621 { FRAME_POINTER_REGNUM, ARM_HARD_FRAME_POINTER_REGNUM },\
1622 { FRAME_POINTER_REGNUM, THUMB_HARD_FRAME_POINTER_REGNUM }}
1624 /* Given FROM and TO register numbers, say whether this elimination is
1625 allowed. Frame pointer elimination is automatically handled.
1627 All eliminations are permissible. Note that ARG_POINTER_REGNUM and
1628 HARD_FRAME_POINTER_REGNUM are in fact the same thing. If we need a frame
1629 pointer, we must eliminate FRAME_POINTER_REGNUM into
1630 HARD_FRAME_POINTER_REGNUM and not into STACK_POINTER_REGNUM or
1631 ARG_POINTER_REGNUM. */
1632 #define CAN_ELIMINATE(FROM, TO) \
1633 (((TO) == FRAME_POINTER_REGNUM && (FROM) == ARG_POINTER_REGNUM) ? 0 : \
1634 ((TO) == STACK_POINTER_REGNUM && frame_pointer_needed) ? 0 : \
1635 ((TO) == ARM_HARD_FRAME_POINTER_REGNUM && TARGET_THUMB) ? 0 : \
1636 ((TO) == THUMB_HARD_FRAME_POINTER_REGNUM && TARGET_ARM) ? 0 : \
1639 #define THUMB_REG_PUSHED_P(reg) \
1640 (regs_ever_live [reg] \
1641 && (! call_used_regs [reg] \
1642 || (flag_pic && (reg) == PIC_OFFSET_TABLE_REGNUM)) \
1643 && !(TARGET_SINGLE_PIC_BASE && ((reg) == arm_pic_register)))
1645 /* Define the offset between two registers, one to be eliminated, and the
1646 other its replacement, at the start of a routine. */
1647 #define ARM_INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1650 (OFFSET) = arm_compute_initial_elimination_offset (FROM, TO); \
1654 /* Note: This macro must match the code in thumb_function_prologue(). */
1655 #define THUMB_INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1658 if ((FROM) == ARG_POINTER_REGNUM) \
1660 int count_regs = 0; \
1662 for (regno = 8; regno < 13; regno ++) \
1663 if (THUMB_REG_PUSHED_P (regno)) \
1666 (OFFSET) += 4 * count_regs; \
1668 for (regno = 0; regno <= LAST_LO_REGNUM; regno ++) \
1669 if (THUMB_REG_PUSHED_P (regno)) \
1671 if (count_regs || ! leaf_function_p () || thumb_far_jump_used_p (0))\
1672 (OFFSET) += 4 * (count_regs + 1); \
1673 if (TARGET_BACKTRACE) \
1675 if ((count_regs & 0xFF) == 0 && (regs_ever_live[3] != 0)) \
1681 if ((TO) == STACK_POINTER_REGNUM) \
1683 (OFFSET) += current_function_outgoing_args_size; \
1684 (OFFSET) += ROUND_UP (get_frame_size ()); \
1688 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
1690 ARM_INITIAL_ELIMINATION_OFFSET (FROM, TO, OFFSET); \
1692 THUMB_INITIAL_ELIMINATION_OFFSET (FROM, TO, OFFSET)
1694 /* Special case handling of the location of arguments passed on the stack. */
1695 #define DEBUGGER_ARG_OFFSET(value, addr) value ? value : arm_debugger_arg_offset (value, addr)
1697 /* Initialize data used by insn expanders. This is called from insn_emit,
1698 once for every function before code is generated. */
1699 #define INIT_EXPANDERS arm_init_expanders ()
1701 /* Output assembler code for a block containing the constant parts
1702 of a trampoline, leaving space for the variable parts.
1704 On the ARM, (if r8 is the static chain regnum, and remembering that
1705 referencing pc adds an offset of 8) the trampoline looks like:
1708 .word static chain value
1709 .word function's address
1710 ??? FIXME: When the trampoline returns, r8 will be clobbered. */
1711 #define ARM_TRAMPOLINE_TEMPLATE(FILE) \
1713 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
1714 STATIC_CHAIN_REGNUM, PC_REGNUM); \
1715 asm_fprintf (FILE, "\tldr\t%r, [%r, #0]\n", \
1716 PC_REGNUM, PC_REGNUM); \
1717 assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \
1718 assemble_aligned_integer (UNITS_PER_WORD, const0_rtx); \
1721 /* On the Thumb we always switch into ARM mode to execute the trampoline.
1722 Why - because it is easier. This code will always be branched to via
1723 a BX instruction and since the compiler magically generates the address
1724 of the function the linker has no opportunity to ensure that the
1725 bottom bit is set. Thus the processor will be in ARM mode when it
1726 reaches this code. So we duplicate the ARM trampoline code and add
1727 a switch into Thumb mode as well. */
1728 #define THUMB_TRAMPOLINE_TEMPLATE(FILE) \
1730 fprintf (FILE, "\t.code 32\n"); \
1731 fprintf (FILE, ".Ltrampoline_start:\n"); \
1732 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
1733 STATIC_CHAIN_REGNUM, PC_REGNUM); \
1734 asm_fprintf (FILE, "\tldr\t%r, [%r, #8]\n", \
1735 IP_REGNUM, PC_REGNUM); \
1736 asm_fprintf (FILE, "\torr\t%r, %r, #1\n", \
1737 IP_REGNUM, IP_REGNUM); \
1738 asm_fprintf (FILE, "\tbx\t%r\n", IP_REGNUM); \
1739 fprintf (FILE, "\t.word\t0\n"); \
1740 fprintf (FILE, "\t.word\t0\n"); \
1741 fprintf (FILE, "\t.code 16\n"); \
1744 #define TRAMPOLINE_TEMPLATE(FILE) \
1746 ARM_TRAMPOLINE_TEMPLATE (FILE) \
1748 THUMB_TRAMPOLINE_TEMPLATE (FILE)
1750 /* Length in units of the trampoline for entering a nested function. */
1751 #define TRAMPOLINE_SIZE (TARGET_ARM ? 16 : 24)
1753 /* Alignment required for a trampoline in bits. */
1754 #define TRAMPOLINE_ALIGNMENT 32
1756 /* Emit RTL insns to initialize the variable parts of a trampoline.
1757 FNADDR is an RTX for the address of the function's pure code.
1758 CXT is an RTX for the static chain value for the function. */
1759 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1762 (gen_rtx_MEM (SImode, plus_constant (TRAMP, TARGET_ARM ? 8 : 16)), CXT); \
1764 (gen_rtx_MEM (SImode, plus_constant (TRAMP, TARGET_ARM ? 12 : 20)), FNADDR); \
1768 /* Addressing modes, and classification of registers for them. */
1769 #define HAVE_POST_INCREMENT 1
1770 #define HAVE_PRE_INCREMENT TARGET_ARM
1771 #define HAVE_POST_DECREMENT TARGET_ARM
1772 #define HAVE_PRE_DECREMENT TARGET_ARM
1774 /* Macros to check register numbers against specific register classes. */
1776 /* These assume that REGNO is a hard or pseudo reg number.
1777 They give nonzero only if REGNO is a hard reg of the suitable class
1778 or a pseudo reg currently allocated to a suitable hard reg.
1779 Since they use reg_renumber, they are safe only once reg_renumber
1780 has been allocated, which happens in local-alloc.c. */
1781 #define TEST_REGNO(R, TEST, VALUE) \
1782 ((R TEST VALUE) || ((unsigned) reg_renumber[R] TEST VALUE))
1784 /* On the ARM, don't allow the pc to be used. */
1785 #define ARM_REGNO_OK_FOR_BASE_P(REGNO) \
1786 (TEST_REGNO (REGNO, <, PC_REGNUM) \
1787 || TEST_REGNO (REGNO, ==, FRAME_POINTER_REGNUM) \
1788 || TEST_REGNO (REGNO, ==, ARG_POINTER_REGNUM))
1790 #define THUMB_REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
1791 (TEST_REGNO (REGNO, <=, LAST_LO_REGNUM) \
1792 || (GET_MODE_SIZE (MODE) >= 4 \
1793 && TEST_REGNO (REGNO, ==, STACK_POINTER_REGNUM)))
1795 #define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
1797 ? THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO, MODE) \
1798 : ARM_REGNO_OK_FOR_BASE_P (REGNO))
1800 /* For ARM code, we don't care about the mode, but for Thumb, the index
1801 must be suitable for use in a QImode load. */
1802 #define REGNO_OK_FOR_INDEX_P(REGNO) \
1803 REGNO_MODE_OK_FOR_BASE_P (REGNO, QImode)
1805 /* Maximum number of registers that can appear in a valid memory address.
1806 Shifts in addresses can't be by a register. */
1807 #define MAX_REGS_PER_ADDRESS 2
1809 /* Recognize any constant value that is a valid address. */
1810 /* XXX We can address any constant, eventually... */
1812 #ifdef AOF_ASSEMBLER
1814 #define CONSTANT_ADDRESS_P(X) \
1815 (GET_CODE (X) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (X))
1819 #define CONSTANT_ADDRESS_P(X) \
1820 (GET_CODE (X) == SYMBOL_REF \
1821 && (CONSTANT_POOL_ADDRESS_P (X) \
1822 || (TARGET_ARM && optimize > 0 && SYMBOL_REF_FLAG (X))))
1824 #endif /* AOF_ASSEMBLER */
1826 /* Nonzero if the constant value X is a legitimate general operand.
1827 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE.
1829 On the ARM, allow any integer (invalid ones are removed later by insn
1830 patterns), nice doubles and symbol_refs which refer to the function's
1833 When generating pic allow anything. */
1834 #define ARM_LEGITIMATE_CONSTANT_P(X) (flag_pic || ! label_mentioned_p (X))
1836 #define THUMB_LEGITIMATE_CONSTANT_P(X) \
1837 ( GET_CODE (X) == CONST_INT \
1838 || GET_CODE (X) == CONST_DOUBLE \
1839 || CONSTANT_ADDRESS_P (X) \
1842 #define LEGITIMATE_CONSTANT_P(X) \
1843 (TARGET_ARM ? ARM_LEGITIMATE_CONSTANT_P (X) : THUMB_LEGITIMATE_CONSTANT_P (X))
1845 /* Special characters prefixed to function names
1846 in order to encode attribute like information.
1847 Note, '@' and '*' have already been taken. */
1848 #define SHORT_CALL_FLAG_CHAR '^'
1849 #define LONG_CALL_FLAG_CHAR '#'
1851 #define ENCODED_SHORT_CALL_ATTR_P(SYMBOL_NAME) \
1852 (*(SYMBOL_NAME) == SHORT_CALL_FLAG_CHAR)
1854 #define ENCODED_LONG_CALL_ATTR_P(SYMBOL_NAME) \
1855 (*(SYMBOL_NAME) == LONG_CALL_FLAG_CHAR)
1857 #ifndef SUBTARGET_NAME_ENCODING_LENGTHS
1858 #define SUBTARGET_NAME_ENCODING_LENGTHS
1861 /* This is a C fragement for the inside of a switch statement.
1862 Each case label should return the number of characters to
1863 be stripped from the start of a function's name, if that
1864 name starts with the indicated character. */
1865 #define ARM_NAME_ENCODING_LENGTHS \
1866 case SHORT_CALL_FLAG_CHAR: return 1; \
1867 case LONG_CALL_FLAG_CHAR: return 1; \
1868 case '*': return 1; \
1869 SUBTARGET_NAME_ENCODING_LENGTHS
1871 /* This is how to output a reference to a user-level label named NAME.
1872 `assemble_name' uses this. */
1873 #undef ASM_OUTPUT_LABELREF
1874 #define ASM_OUTPUT_LABELREF(FILE, NAME) \
1875 arm_asm_output_labelref (FILE, NAME)
1877 #define ARM_DECLARE_FUNCTION_SIZE(STREAM, NAME, DECL) \
1878 arm_encode_call_attribute (DECL, SHORT_CALL_FLAG_CHAR)
1880 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
1881 and check its validity for a certain class.
1882 We have two alternate definitions for each of them.
1883 The usual definition accepts all pseudo regs; the other rejects
1884 them unless they have been allocated suitable hard regs.
1885 The symbol REG_OK_STRICT causes the latter definition to be used. */
1886 #ifndef REG_OK_STRICT
1888 #define ARM_REG_OK_FOR_BASE_P(X) \
1889 (REGNO (X) <= LAST_ARM_REGNUM \
1890 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
1891 || REGNO (X) == FRAME_POINTER_REGNUM \
1892 || REGNO (X) == ARG_POINTER_REGNUM)
1894 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
1895 (REGNO (X) <= LAST_LO_REGNUM \
1896 || REGNO (X) >= FIRST_PSEUDO_REGISTER \
1897 || (GET_MODE_SIZE (MODE) >= 4 \
1898 && (REGNO (X) == STACK_POINTER_REGNUM \
1899 || (X) == hard_frame_pointer_rtx \
1900 || (X) == arg_pointer_rtx)))
1902 #else /* REG_OK_STRICT */
1904 #define ARM_REG_OK_FOR_BASE_P(X) \
1905 ARM_REGNO_OK_FOR_BASE_P (REGNO (X))
1907 #define THUMB_REG_MODE_OK_FOR_BASE_P(X, MODE) \
1908 THUMB_REGNO_MODE_OK_FOR_BASE_P (REGNO (X), MODE)
1910 #endif /* REG_OK_STRICT */
1912 /* Now define some helpers in terms of the above. */
1914 #define REG_MODE_OK_FOR_BASE_P(X, MODE) \
1916 ? THUMB_REG_MODE_OK_FOR_BASE_P (X, MODE) \
1917 : ARM_REG_OK_FOR_BASE_P (X))
1919 #define ARM_REG_OK_FOR_INDEX_P(X) ARM_REG_OK_FOR_BASE_P (X)
1921 /* For Thumb, a valid index register is anything that can be used in
1922 a byte load instruction. */
1923 #define THUMB_REG_OK_FOR_INDEX_P(X) THUMB_REG_MODE_OK_FOR_BASE_P (X, QImode)
1925 /* Nonzero if X is a hard reg that can be used as an index
1926 or if it is a pseudo reg. On the Thumb, the stack pointer
1928 #define REG_OK_FOR_INDEX_P(X) \
1930 ? THUMB_REG_OK_FOR_INDEX_P (X) \
1931 : ARM_REG_OK_FOR_INDEX_P (X))
1934 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
1935 that is a valid memory address for an instruction.
1936 The MODE argument is the machine mode for the MEM expression
1937 that wants to use this address.
1939 The other macros defined here are used only in GO_IF_LEGITIMATE_ADDRESS. */
1941 /* --------------------------------arm version----------------------------- */
1942 #define ARM_BASE_REGISTER_RTX_P(X) \
1943 (GET_CODE (X) == REG && ARM_REG_OK_FOR_BASE_P (X))
1945 #define ARM_INDEX_REGISTER_RTX_P(X) \
1946 (GET_CODE (X) == REG && ARM_REG_OK_FOR_INDEX_P (X))
1948 /* A C statement (sans semicolon) to jump to LABEL for legitimate index RTXs
1949 used by the macro GO_IF_LEGITIMATE_ADDRESS. Floating point indices can
1950 only be small constants. */
1951 #define ARM_GO_IF_LEGITIMATE_INDEX(MODE, BASE_REGNO, INDEX, LABEL) \
1954 HOST_WIDE_INT range; \
1955 enum rtx_code code = GET_CODE (INDEX); \
1957 if (TARGET_HARD_FLOAT && GET_MODE_CLASS (MODE) == MODE_FLOAT) \
1959 if (code == CONST_INT && INTVAL (INDEX) < 1024 \
1960 && INTVAL (INDEX) > -1024 \
1961 && (INTVAL (INDEX) & 3) == 0) \
1966 if (ARM_INDEX_REGISTER_RTX_P (INDEX) \
1967 && GET_MODE_SIZE (MODE) <= 4) \
1969 if (GET_MODE_SIZE (MODE) <= 4 && code == MULT \
1970 && (! arm_arch4 || (MODE) != HImode)) \
1972 rtx xiop0 = XEXP (INDEX, 0); \
1973 rtx xiop1 = XEXP (INDEX, 1); \
1974 if (ARM_INDEX_REGISTER_RTX_P (xiop0) \
1975 && power_of_two_operand (xiop1, SImode)) \
1977 if (ARM_INDEX_REGISTER_RTX_P (xiop1) \
1978 && power_of_two_operand (xiop0, SImode)) \
1981 if (GET_MODE_SIZE (MODE) <= 4 \
1982 && (code == LSHIFTRT || code == ASHIFTRT \
1983 || code == ASHIFT || code == ROTATERT) \
1984 && (! arm_arch4 || (MODE) != HImode)) \
1986 rtx op = XEXP (INDEX, 1); \
1987 if (ARM_INDEX_REGISTER_RTX_P (XEXP (INDEX, 0)) \
1988 && GET_CODE (op) == CONST_INT && INTVAL (op) > 0 \
1989 && INTVAL (op) <= 31) \
1992 /* NASTY: Since this limits the addressing of unsigned \
1994 range = ((MODE) == HImode || (MODE) == QImode) \
1995 ? (arm_arch4 ? 256 : 4095) : 4096; \
1996 if (code == CONST_INT && INTVAL (INDEX) < range \
1997 && INTVAL (INDEX) > -range) \
2003 /* Jump to LABEL if X is a valid address RTX. This must take
2004 REG_OK_STRICT into account when deciding about valid registers.
2006 Allow REG, REG+REG, REG+INDEX, INDEX+REG, REG-INDEX, and non
2007 floating SYMBOL_REF to the constant pool. Allow REG-only and
2008 AUTINC-REG if handling TImode or HImode. Other symbol refs must be
2009 forced though a static cell to ensure addressability. */
2010 #define ARM_GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \
2012 if (ARM_BASE_REGISTER_RTX_P (X)) \
2014 else if ((GET_CODE (X) == POST_INC || GET_CODE (X) == PRE_DEC) \
2015 && GET_CODE (XEXP (X, 0)) == REG \
2016 && ARM_REG_OK_FOR_BASE_P (XEXP (X, 0))) \
2018 else if (GET_MODE_SIZE (MODE) >= 4 && reload_completed \
2019 && (GET_CODE (X) == LABEL_REF \
2020 || (GET_CODE (X) == CONST \
2021 && GET_CODE (XEXP ((X), 0)) == PLUS \
2022 && GET_CODE (XEXP (XEXP ((X), 0), 0)) == LABEL_REF \
2023 && GET_CODE (XEXP (XEXP ((X), 0), 1)) == CONST_INT)))\
2025 else if ((MODE) == TImode) \
2027 else if ((MODE) == DImode || (TARGET_SOFT_FLOAT && (MODE) == DFmode)) \
2029 if (GET_CODE (X) == PLUS && ARM_BASE_REGISTER_RTX_P (XEXP (X, 0)) \
2030 && GET_CODE (XEXP (X, 1)) == CONST_INT) \
2032 HOST_WIDE_INT val = INTVAL (XEXP (X, 1)); \
2033 if (val == 4 || val == -4 || val == -8) \
2037 else if (GET_CODE (X) == PLUS) \
2039 rtx xop0 = XEXP (X, 0); \
2040 rtx xop1 = XEXP (X, 1); \
2042 if (ARM_BASE_REGISTER_RTX_P (xop0)) \
2043 ARM_GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop0), xop1, LABEL); \
2044 else if (ARM_BASE_REGISTER_RTX_P (xop1)) \
2045 ARM_GO_IF_LEGITIMATE_INDEX (MODE, REGNO (xop1), xop0, LABEL); \
2047 /* Reload currently can't handle MINUS, so disable this for now */ \
2048 /* else if (GET_CODE (X) == MINUS) \
2050 rtx xop0 = XEXP (X,0); \
2051 rtx xop1 = XEXP (X,1); \
2053 if (ARM_BASE_REGISTER_RTX_P (xop0)) \
2054 ARM_GO_IF_LEGITIMATE_INDEX (MODE, -1, xop1, LABEL); \
2056 else if (GET_MODE_CLASS (MODE) != MODE_FLOAT \
2057 && GET_CODE (X) == SYMBOL_REF \
2058 && CONSTANT_POOL_ADDRESS_P (X) \
2060 && symbol_mentioned_p (get_pool_constant (X)))) \
2062 else if ((GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_DEC) \
2063 && (GET_MODE_SIZE (MODE) <= 4) \
2064 && GET_CODE (XEXP (X, 0)) == REG \
2065 && ARM_REG_OK_FOR_BASE_P (XEXP (X, 0))) \
2069 /* ---------------------thumb version----------------------------------*/
2070 #define THUMB_LEGITIMATE_OFFSET(MODE, VAL) \
2071 (GET_MODE_SIZE (MODE) == 1 ? ((unsigned HOST_WIDE_INT) (VAL) < 32) \
2072 : GET_MODE_SIZE (MODE) == 2 ? ((unsigned HOST_WIDE_INT) (VAL) < 64 \
2073 && ((VAL) & 1) == 0) \
2074 : ((VAL) >= 0 && ((VAL) + GET_MODE_SIZE (MODE)) <= 128 \
2075 && ((VAL) & 3) == 0))
2077 /* The AP may be eliminated to either the SP or the FP, so we use the
2078 least common denominator, e.g. SImode, and offsets from 0 to 64. */
2080 /* ??? Verify whether the above is the right approach. */
2082 /* ??? Also, the FP may be eliminated to the SP, so perhaps that
2083 needs special handling also. */
2085 /* ??? Look at how the mips16 port solves this problem. It probably uses
2086 better ways to solve some of these problems. */
2088 /* Although it is not incorrect, we don't accept QImode and HImode
2089 addresses based on the frame pointer or arg pointer until the
2090 reload pass starts. This is so that eliminating such addresses
2091 into stack based ones won't produce impossible code. */
2092 #define THUMB_GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \
2094 /* ??? Not clear if this is right. Experiment. */ \
2095 if (GET_MODE_SIZE (MODE) < 4 \
2096 && ! (reload_in_progress || reload_completed) \
2097 && ( reg_mentioned_p (frame_pointer_rtx, X) \
2098 || reg_mentioned_p (arg_pointer_rtx, X) \
2099 || reg_mentioned_p (virtual_incoming_args_rtx, X) \
2100 || reg_mentioned_p (virtual_outgoing_args_rtx, X) \
2101 || reg_mentioned_p (virtual_stack_dynamic_rtx, X) \
2102 || reg_mentioned_p (virtual_stack_vars_rtx, X))) \
2104 /* Accept any base register. SP only in SImode or larger. */ \
2105 else if (GET_CODE (X) == REG \
2106 && THUMB_REG_MODE_OK_FOR_BASE_P (X, MODE)) \
2108 /* This is PC relative data before MACHINE_DEPENDENT_REORG runs. */ \
2109 else if (GET_MODE_SIZE (MODE) >= 4 && CONSTANT_P (X) \
2110 && GET_CODE (X) == SYMBOL_REF \
2111 && CONSTANT_POOL_ADDRESS_P (X) && ! flag_pic) \
2113 /* This is PC relative data after MACHINE_DEPENDENT_REORG runs. */ \
2114 else if (GET_MODE_SIZE (MODE) >= 4 && reload_completed \
2115 && (GET_CODE (X) == LABEL_REF \
2116 || (GET_CODE (X) == CONST \
2117 && GET_CODE (XEXP (X, 0)) == PLUS \
2118 && GET_CODE (XEXP (XEXP (X, 0), 0)) == LABEL_REF \
2119 && GET_CODE (XEXP (XEXP (X, 0), 1)) == CONST_INT))) \
2121 /* Post-inc indexing only supported for SImode and larger. */ \
2122 else if (GET_CODE (X) == POST_INC && GET_MODE_SIZE (MODE) >= 4 \
2123 && GET_CODE (XEXP (X, 0)) == REG \
2124 && THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 0))) \
2126 else if (GET_CODE (X) == PLUS) \
2128 /* REG+REG address can be any two index registers. */ \
2129 /* We disallow FRAME+REG addressing since we know that FRAME \
2130 will be replaced with STACK, and SP relative addressing only \
2131 permits SP+OFFSET. */ \
2132 if (GET_MODE_SIZE (MODE) <= 4 \
2133 && GET_CODE (XEXP (X, 0)) == REG \
2134 && GET_CODE (XEXP (X, 1)) == REG \
2135 && XEXP (X, 0) != frame_pointer_rtx \
2136 && XEXP (X, 1) != frame_pointer_rtx \
2137 && XEXP (X, 0) != virtual_stack_vars_rtx \
2138 && XEXP (X, 1) != virtual_stack_vars_rtx \
2139 && THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
2140 && THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 1))) \
2142 /* REG+const has 5-7 bit offset for non-SP registers. */ \
2143 else if (GET_CODE (XEXP (X, 0)) == REG \
2144 && (THUMB_REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
2145 || XEXP (X, 0) == arg_pointer_rtx) \
2146 && GET_CODE (XEXP (X, 1)) == CONST_INT \
2147 && THUMB_LEGITIMATE_OFFSET (MODE, INTVAL (XEXP (X, 1)))) \
2149 /* REG+const has 10 bit offset for SP, but only SImode and \
2150 larger is supported. */ \
2151 /* ??? Should probably check for DI/DFmode overflow here \
2152 just like GO_IF_LEGITIMATE_OFFSET does. */ \
2153 else if (GET_CODE (XEXP (X, 0)) == REG \
2154 && REGNO (XEXP (X, 0)) == STACK_POINTER_REGNUM \
2155 && GET_MODE_SIZE (MODE) >= 4 \
2156 && GET_CODE (XEXP (X, 1)) == CONST_INT \
2157 && ((unsigned HOST_WIDE_INT) INTVAL (XEXP (X, 1)) \
2158 + GET_MODE_SIZE (MODE)) <= 1024 \
2159 && (INTVAL (XEXP (X, 1)) & 3) == 0) \
2161 else if (GET_CODE (XEXP (X, 0)) == REG \
2162 && REGNO (XEXP (X, 0)) == FRAME_POINTER_REGNUM \
2163 && GET_MODE_SIZE (MODE) >= 4 \
2164 && GET_CODE (XEXP (X, 1)) == CONST_INT \
2165 && (INTVAL (XEXP (X, 1)) & 3) == 0) \
2168 else if (GET_MODE_CLASS (MODE) != MODE_FLOAT \
2169 && GET_CODE (X) == SYMBOL_REF \
2170 && CONSTANT_POOL_ADDRESS_P (X) \
2172 && symbol_mentioned_p (get_pool_constant (X)))) \
2176 /* ------------------------------------------------------------------- */
2177 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, WIN) \
2179 ARM_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN) \
2180 else /* if (TARGET_THUMB) */ \
2181 THUMB_GO_IF_LEGITIMATE_ADDRESS (MODE, X, WIN)
2182 /* ------------------------------------------------------------------- */
2184 /* Try machine-dependent ways of modifying an illegitimate address
2185 to be legitimate. If we find one, return the new, valid address.
2186 This macro is used in only one place: `memory_address' in explow.c.
2188 OLDX is the address as it was before break_out_memory_refs was called.
2189 In some cases it is useful to look at this to decide what needs to be done.
2191 MODE and WIN are passed so that this macro can use
2192 GO_IF_LEGITIMATE_ADDRESS.
2194 It is always safe for this macro to do nothing. It exists to recognize
2195 opportunities to optimize the output.
2197 On the ARM, try to convert [REG, #BIGCONST]
2198 into ADD BASE, REG, #UPPERCONST and [BASE, #VALIDCONST],
2199 where VALIDCONST == 0 in case of TImode. */
2200 #define ARM_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2202 if (GET_CODE (X) == PLUS) \
2204 rtx xop0 = XEXP (X, 0); \
2205 rtx xop1 = XEXP (X, 1); \
2207 if (CONSTANT_P (xop0) && ! symbol_mentioned_p (xop0)) \
2208 xop0 = force_reg (SImode, xop0); \
2209 if (CONSTANT_P (xop1) && ! symbol_mentioned_p (xop1)) \
2210 xop1 = force_reg (SImode, xop1); \
2211 if (ARM_BASE_REGISTER_RTX_P (xop0) \
2212 && GET_CODE (xop1) == CONST_INT) \
2214 HOST_WIDE_INT n, low_n; \
2215 rtx base_reg, val; \
2216 n = INTVAL (xop1); \
2218 if (MODE == DImode || (TARGET_SOFT_FLOAT && MODE == DFmode)) \
2230 low_n = ((MODE) == TImode ? 0 \
2231 : n >= 0 ? (n & 0xfff) : -((-n) & 0xfff)); \
2234 base_reg = gen_reg_rtx (SImode); \
2235 val = force_operand (gen_rtx_PLUS (SImode, xop0, \
2236 GEN_INT (n)), NULL_RTX); \
2237 emit_move_insn (base_reg, val); \
2238 (X) = (low_n == 0 ? base_reg \
2239 : gen_rtx_PLUS (SImode, base_reg, GEN_INT (low_n))); \
2241 else if (xop0 != XEXP (X, 0) || xop1 != XEXP (x, 1)) \
2242 (X) = gen_rtx_PLUS (SImode, xop0, xop1); \
2244 else if (GET_CODE (X) == MINUS) \
2246 rtx xop0 = XEXP (X, 0); \
2247 rtx xop1 = XEXP (X, 1); \
2249 if (CONSTANT_P (xop0)) \
2250 xop0 = force_reg (SImode, xop0); \
2251 if (CONSTANT_P (xop1) && ! symbol_mentioned_p (xop1)) \
2252 xop1 = force_reg (SImode, xop1); \
2253 if (xop0 != XEXP (X, 0) || xop1 != XEXP (X, 1)) \
2254 (X) = gen_rtx_MINUS (SImode, xop0, xop1); \
2257 (X) = legitimize_pic_address (OLDX, MODE, NULL_RTX); \
2258 if (memory_address_p (MODE, X)) \
2262 #define THUMB_LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2264 (X) = legitimize_pic_address (OLDX, MODE, NULL_RTX);
2266 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) \
2268 ARM_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN) \
2270 THUMB_LEGITIMIZE_ADDRESS (X, OLDX, MODE, WIN)
2272 /* Go to LABEL if ADDR (a legitimate address expression)
2273 has an effect that depends on the machine mode it is used for. */
2274 #define ARM_GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2276 if ( GET_CODE (ADDR) == PRE_DEC || GET_CODE (ADDR) == POST_DEC \
2277 || GET_CODE (ADDR) == PRE_INC || GET_CODE (ADDR) == POST_INC) \
2281 /* Nothing helpful to do for the Thumb */
2282 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
2284 ARM_GO_IF_MODE_DEPENDENT_ADDRESS (ADDR, LABEL)
2287 /* Specify the machine mode that this machine uses
2288 for the index in the tablejump instruction. */
2289 #define CASE_VECTOR_MODE Pmode
2291 /* Define as C expression which evaluates to nonzero if the tablejump
2292 instruction expects the table to contain offsets from the address of the
2294 Do not define this if the table should contain absolute addresses. */
2295 /* #define CASE_VECTOR_PC_RELATIVE 1 */
2297 /* signed 'char' is most compatible, but RISC OS wants it unsigned.
2298 unsigned is probably best, but may break some code. */
2299 #ifndef DEFAULT_SIGNED_CHAR
2300 #define DEFAULT_SIGNED_CHAR 0
2303 /* Don't cse the address of the function being compiled. */
2304 #define NO_RECURSIVE_FUNCTION_CSE 1
2306 /* Max number of bytes we can move from memory to memory
2307 in one reasonably fast instruction. */
2311 #define MOVE_RATIO (arm_is_xscale ? 4 : 2)
2313 /* Define if operations between registers always perform the operation
2314 on the full register even if a narrower mode is specified. */
2315 #define WORD_REGISTER_OPERATIONS
2317 /* Define if loading in MODE, an integral mode narrower than BITS_PER_WORD
2318 will either zero-extend or sign-extend. The value of this macro should
2319 be the code that says which one of the two operations is implicitly
2320 done, NIL if none. */
2321 #define LOAD_EXTEND_OP(MODE) \
2322 (TARGET_THUMB ? ZERO_EXTEND : \
2323 ((arm_arch4 || (MODE) == QImode) ? ZERO_EXTEND \
2324 : ((BYTES_BIG_ENDIAN && (MODE) == HImode) ? SIGN_EXTEND : NIL)))
2326 /* Nonzero if access to memory by bytes is slow and undesirable. */
2327 #define SLOW_BYTE_ACCESS 0
2329 #define SLOW_UNALIGNED_ACCESS(MODE, ALIGN) 1
2331 /* Immediate shift counts are truncated by the output routines (or was it
2332 the assembler?). Shift counts in a register are truncated by ARM. Note
2333 that the native compiler puts too large (> 32) immediate shift counts
2334 into a register and shifts by the register, letting the ARM decide what
2335 to do instead of doing that itself. */
2336 /* This is all wrong. Defining SHIFT_COUNT_TRUNCATED tells combine that
2337 code like (X << (Y % 32)) for register X, Y is equivalent to (X << Y).
2338 On the arm, Y in a register is used modulo 256 for the shift. Only for
2339 rotates is modulo 32 used. */
2340 /* #define SHIFT_COUNT_TRUNCATED 1 */
2342 /* All integers have the same format so truncation is easy. */
2343 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
2345 /* Calling from registers is a massive pain. */
2346 #define NO_FUNCTION_CSE 1
2348 /* Chars and shorts should be passed as ints. */
2349 #define PROMOTE_PROTOTYPES 1
2351 /* The machine modes of pointers and functions */
2352 #define Pmode SImode
2353 #define FUNCTION_MODE Pmode
2355 #define ARM_FRAME_RTX(X) \
2356 ( (X) == frame_pointer_rtx || (X) == stack_pointer_rtx \
2357 || (X) == arg_pointer_rtx)
2359 #define DEFAULT_RTX_COSTS(X, CODE, OUTER_CODE) \
2360 return arm_rtx_costs (X, CODE, OUTER_CODE);
2362 /* Moves to and from memory are quite expensive */
2363 #define MEMORY_MOVE_COST(M, CLASS, IN) \
2364 (TARGET_ARM ? 10 : \
2365 ((GET_MODE_SIZE (M) < 4 ? 8 : 2 * GET_MODE_SIZE (M)) \
2366 * (CLASS == LO_REGS ? 1 : 2)))
2368 /* All address computations that can be done are free, but rtx cost returns
2369 the same for practically all of them. So we weight the different types
2370 of address here in the order (most pref first):
2371 PRE/POST_INC/DEC, SHIFT or NON-INT sum, INT sum, REG, MEM or LABEL. */
2372 #define ARM_ADDRESS_COST(X) \
2373 (10 - ((GET_CODE (X) == MEM || GET_CODE (X) == LABEL_REF \
2374 || GET_CODE (X) == SYMBOL_REF) \
2376 : ((GET_CODE (X) == PRE_INC || GET_CODE (X) == PRE_DEC \
2377 || GET_CODE (X) == POST_INC || GET_CODE (X) == POST_DEC) \
2379 : (((GET_CODE (X) == PLUS || GET_CODE (X) == MINUS) \
2380 ? 6 + (GET_CODE (XEXP (X, 1)) == CONST_INT ? 2 \
2381 : ((GET_RTX_CLASS (GET_CODE (XEXP (X, 0))) == '2' \
2382 || GET_RTX_CLASS (GET_CODE (XEXP (X, 0))) == 'c' \
2383 || GET_RTX_CLASS (GET_CODE (XEXP (X, 1))) == '2' \
2384 || GET_RTX_CLASS (GET_CODE (XEXP (X, 1))) == 'c') \
2388 #define THUMB_ADDRESS_COST(X) \
2389 ((GET_CODE (X) == REG \
2390 || (GET_CODE (X) == PLUS && GET_CODE (XEXP (X, 0)) == REG \
2391 && GET_CODE (XEXP (X, 1)) == CONST_INT)) \
2394 #define ADDRESS_COST(X) \
2395 (TARGET_ARM ? ARM_ADDRESS_COST (X) : THUMB_ADDRESS_COST (X))
2397 /* Try to generate sequences that don't involve branches, we can then use
2398 conditional instructions */
2399 #define BRANCH_COST \
2400 (TARGET_ARM ? 4 : (optimize > 1 ? 1 : 0))
2402 /* Position Independent Code. */
2403 /* We decide which register to use based on the compilation options and
2404 the assembler in use; this is more general than the APCS restriction of
2405 using sb (r9) all the time. */
2406 extern int arm_pic_register;
2408 /* Used when parsing command line option -mpic-register=. */
2409 extern const char * arm_pic_register_string;
2411 /* The register number of the register used to address a table of static
2412 data addresses in memory. */
2413 #define PIC_OFFSET_TABLE_REGNUM arm_pic_register
2415 #define FINALIZE_PIC arm_finalize_pic (1)
2417 /* We can't directly access anything that contains a symbol,
2418 nor can we indirect via the constant pool. */
2419 #define LEGITIMATE_PIC_OPERAND_P(X) \
2420 (!(symbol_mentioned_p (X) \
2421 || label_mentioned_p (X) \
2422 || (GET_CODE (X) == SYMBOL_REF \
2423 && CONSTANT_POOL_ADDRESS_P (X) \
2424 && (symbol_mentioned_p (get_pool_constant (X)) \
2425 || label_mentioned_p (get_pool_constant (X))))))
2427 /* We need to know when we are making a constant pool; this determines
2428 whether data needs to be in the GOT or can be referenced via a GOT
2430 extern int making_const_table;
2432 /* Handle pragmas for compatibility with Intel's compilers. */
2433 #define REGISTER_TARGET_PRAGMAS(PFILE) do { \
2434 cpp_register_pragma (PFILE, 0, "long_calls", arm_pr_long_calls); \
2435 cpp_register_pragma (PFILE, 0, "no_long_calls", arm_pr_no_long_calls); \
2436 cpp_register_pragma (PFILE, 0, "long_calls_off", arm_pr_long_calls_off); \
2439 /* Condition code information. */
2440 /* Given a comparison code (EQ, NE, etc.) and the first operand of a COMPARE,
2441 return the mode to be used for the comparison. */
2443 #define SELECT_CC_MODE(OP, X, Y) arm_select_cc_mode (OP, X, Y)
2445 #define REVERSIBLE_CC_MODE(MODE) ((MODE) != CCFPEmode)
2447 #define CANONICALIZE_COMPARISON(CODE, OP0, OP1) \
2450 if (GET_CODE (OP1) == CONST_INT \
2451 && ! (const_ok_for_arm (INTVAL (OP1)) \
2452 || (const_ok_for_arm (- INTVAL (OP1))))) \
2454 rtx const_op = OP1; \
2455 CODE = arm_canonicalize_comparison ((CODE), &const_op); \
2461 #define STORE_FLAG_VALUE 1
2465 /* Gcc puts the pool in the wrong place for ARM, since we can only
2466 load addresses a limited distance around the pc. We do some
2467 special munging to move the constant pool values to the correct
2468 point in the code. */
2469 #define MACHINE_DEPENDENT_REORG(INSN) \
2473 #define ASM_APP_OFF (TARGET_THUMB ? "\t.code\t16\n" : "")
2475 /* Output an internal label definition. */
2476 #ifndef ASM_OUTPUT_INTERNAL_LABEL
2477 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
2480 char * s = (char *) alloca (40 + strlen (PREFIX)); \
2482 if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \
2483 && !strcmp (PREFIX, "L")) \
2485 arm_ccfsm_state = 0; \
2486 arm_target_insn = NULL; \
2488 ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \
2489 ASM_OUTPUT_LABEL (STREAM, s); \
2494 /* Output a push or a pop instruction (only used when profiling). */
2495 #define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \
2497 asm_fprintf (STREAM,"\tstmfd\t%r!,{%r}\n", \
2498 STACK_POINTER_REGNUM, REGNO); \
2500 asm_fprintf (STREAM, "\tpush {%r}\n", REGNO)
2503 #define ASM_OUTPUT_REG_POP(STREAM, REGNO) \
2505 asm_fprintf (STREAM, "\tldmfd\t%r!,{%r}\n", \
2506 STACK_POINTER_REGNUM, REGNO); \
2508 asm_fprintf (STREAM, "\tpop {%r}\n", REGNO)
2510 /* This is how to output a label which precedes a jumptable. Since
2511 Thumb instructions are 2 bytes, we may need explicit alignment here. */
2512 #undef ASM_OUTPUT_CASE_LABEL
2513 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE) \
2517 ASM_OUTPUT_ALIGN (FILE, 2); \
2518 ASM_OUTPUT_INTERNAL_LABEL (FILE, PREFIX, NUM); \
2522 #define ARM_DECLARE_FUNCTION_NAME(STREAM, NAME, DECL) \
2527 if (is_called_in_ARM_mode (DECL)) \
2528 fprintf (STREAM, "\t.code 32\n") ; \
2530 fprintf (STREAM, "\t.thumb_func\n") ; \
2532 if (TARGET_POKE_FUNCTION_NAME) \
2533 arm_poke_function_name (STREAM, (char *) NAME); \
2537 /* For aliases of functions we use .thumb_set instead. */
2538 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL1, DECL2) \
2541 const char *const LABEL1 = XSTR (XEXP (DECL_RTL (decl), 0), 0); \
2542 const char *const LABEL2 = IDENTIFIER_POINTER (DECL2); \
2544 if (TARGET_THUMB && TREE_CODE (DECL1) == FUNCTION_DECL) \
2546 fprintf (FILE, "\t.thumb_set "); \
2547 assemble_name (FILE, LABEL1); \
2548 fprintf (FILE, ","); \
2549 assemble_name (FILE, LABEL2); \
2550 fprintf (FILE, "\n"); \
2553 ASM_OUTPUT_DEF (FILE, LABEL1, LABEL2); \
2557 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
2558 /* To support -falign-* switches we need to use .p2align so
2559 that alignment directives in code sections will be padded
2560 with no-op instructions, rather than zeroes. */
2561 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \
2564 if ((MAX_SKIP) == 0) \
2565 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \
2567 fprintf ((FILE), "\t.p2align %d,,%d\n", \
2568 (LOG), (MAX_SKIP)); \
2572 /* Only perform branch elimination (by making instructions conditional) if
2573 we're optimising. Otherwise it's of no use anyway. */
2574 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
2575 if (TARGET_ARM && optimize) \
2576 arm_final_prescan_insn (INSN); \
2577 else if (TARGET_THUMB) \
2578 thumb_final_prescan_insn (INSN)
2580 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
2581 (CODE == '@' || CODE == '|' \
2582 || (TARGET_ARM && (CODE == '?')) \
2583 || (TARGET_THUMB && (CODE == '_')))
2585 /* Output an operand of an instruction. */
2586 #define PRINT_OPERAND(STREAM, X, CODE) \
2587 arm_print_operand (STREAM, X, CODE)
2589 #define ARM_SIGN_EXTEND(x) ((HOST_WIDE_INT) \
2590 (HOST_BITS_PER_WIDE_INT <= 32 ? (unsigned HOST_WIDE_INT) (x) \
2591 : ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0xffffffff) |\
2592 ((((unsigned HOST_WIDE_INT)(x)) & (unsigned HOST_WIDE_INT) 0x80000000) \
2593 ? ((~ (unsigned HOST_WIDE_INT) 0) \
2594 & ~ (unsigned HOST_WIDE_INT) 0xffffffff) \
2597 /* Output the address of an operand. */
2598 #define ARM_PRINT_OPERAND_ADDRESS(STREAM, X) \
2600 int is_minus = GET_CODE (X) == MINUS; \
2602 if (GET_CODE (X) == REG) \
2603 asm_fprintf (STREAM, "[%r, #0]", REGNO (X)); \
2604 else if (GET_CODE (X) == PLUS || is_minus) \
2606 rtx base = XEXP (X, 0); \
2607 rtx index = XEXP (X, 1); \
2608 HOST_WIDE_INT offset = 0; \
2609 if (GET_CODE (base) != REG) \
2611 /* Ensure that BASE is a register */ \
2612 /* (one of them must be). */ \
2617 switch (GET_CODE (index)) \
2620 offset = INTVAL (index); \
2623 asm_fprintf (STREAM, "[%r, #%d]", \
2624 REGNO (base), offset); \
2628 asm_fprintf (STREAM, "[%r, %s%r]", \
2629 REGNO (base), is_minus ? "-" : "", \
2639 asm_fprintf (STREAM, "[%r, %s%r", \
2640 REGNO (base), is_minus ? "-" : "", \
2641 REGNO (XEXP (index, 0))); \
2642 arm_print_operand (STREAM, index, 'S'); \
2643 fputs ("]", STREAM); \
2651 else if ( GET_CODE (X) == PRE_INC || GET_CODE (X) == POST_INC\
2652 || GET_CODE (X) == PRE_DEC || GET_CODE (X) == POST_DEC)\
2654 extern int output_memory_reference_mode; \
2656 if (GET_CODE (XEXP (X, 0)) != REG) \
2659 if (GET_CODE (X) == PRE_DEC || GET_CODE (X) == PRE_INC) \
2660 asm_fprintf (STREAM, "[%r, #%s%d]!", \
2661 REGNO (XEXP (X, 0)), \
2662 GET_CODE (X) == PRE_DEC ? "-" : "", \
2663 GET_MODE_SIZE (output_memory_reference_mode));\
2665 asm_fprintf (STREAM, "[%r], #%s%d", \
2666 REGNO (XEXP (X, 0)), \
2667 GET_CODE (X) == POST_DEC ? "-" : "", \
2668 GET_MODE_SIZE (output_memory_reference_mode));\
2670 else output_addr_const (STREAM, X); \
2673 #define THUMB_PRINT_OPERAND_ADDRESS(STREAM, X) \
2675 if (GET_CODE (X) == REG) \
2676 asm_fprintf (STREAM, "[%r]", REGNO (X)); \
2677 else if (GET_CODE (X) == POST_INC) \
2678 asm_fprintf (STREAM, "%r!", REGNO (XEXP (X, 0))); \
2679 else if (GET_CODE (X) == PLUS) \
2681 if (GET_CODE (XEXP (X, 1)) == CONST_INT) \
2682 asm_fprintf (STREAM, "[%r, #%d]", \
2683 REGNO (XEXP (X, 0)), \
2684 (int) INTVAL (XEXP (X, 1))); \
2686 asm_fprintf (STREAM, "[%r, %r]", \
2687 REGNO (XEXP (X, 0)), \
2688 REGNO (XEXP (X, 1))); \
2691 output_addr_const (STREAM, X); \
2694 #define PRINT_OPERAND_ADDRESS(STREAM, X) \
2696 ARM_PRINT_OPERAND_ADDRESS (STREAM, X) \
2698 THUMB_PRINT_OPERAND_ADDRESS (STREAM, X)
2700 /* Output code to add DELTA to the first argument, and then jump to FUNCTION.
2701 Used for C++ multiple inheritance. */
2702 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
2705 int mi_delta = (DELTA); \
2706 const char *const mi_op = mi_delta < 0 ? "sub" : "add"; \
2708 int this_regno = (aggregate_value_p (TREE_TYPE (TREE_TYPE (FUNCTION))) \
2711 mi_delta = - mi_delta; \
2712 while (mi_delta != 0) \
2714 if ((mi_delta & (3 << shift)) == 0) \
2718 asm_fprintf (FILE, "\t%s\t%r, %r, #%d\n", \
2719 mi_op, this_regno, this_regno, \
2720 mi_delta & (0xff << shift)); \
2721 mi_delta &= ~(0xff << shift); \
2725 fputs ("\tb\t", FILE); \
2726 assemble_name (FILE, XSTR (XEXP (DECL_RTL (FUNCTION), 0), 0)); \
2727 if (NEED_PLT_RELOC) \
2728 fputs ("(PLT)", FILE); \
2729 fputc ('\n', FILE); \
2733 /* A C expression whose value is RTL representing the value of the return
2734 address for the frame COUNT steps up from the current frame. */
2736 #define RETURN_ADDR_RTX(COUNT, FRAME) \
2737 arm_return_addr (COUNT, FRAME)
2739 /* Mask of the bits in the PC that contain the real return address
2740 when running in 26-bit mode. */
2741 #define RETURN_ADDR_MASK26 (0x03fffffc)
2743 /* Pick up the return address upon entry to a procedure. Used for
2744 dwarf2 unwind information. This also enables the table driven
2746 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, LR_REGNUM)
2747 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (LR_REGNUM)
2749 /* Used to mask out junk bits from the return address, such as
2750 processor state, interrupt status, condition codes and the like. */
2751 #define MASK_RETURN_ADDR \
2752 /* If we are generating code for an ARM2/ARM3 machine or for an ARM6 \
2753 in 26 bit mode, the condition codes must be masked out of the \
2754 return address. This does not apply to ARM6 and later processors \
2755 when running in 32 bit mode. */ \
2756 ((!TARGET_APCS_32) ? (gen_int_mode (RETURN_ADDR_MASK26, Pmode)) \
2757 : (arm_arch4 || TARGET_THUMB) ? \
2758 (gen_int_mode ((unsigned long)0xffffffff, Pmode)) \
2759 : arm_gen_return_addr_mask ())
2762 /* Define the codes that are matched by predicates in arm.c */
2763 #define PREDICATE_CODES \
2764 {"s_register_operand", {SUBREG, REG}}, \
2765 {"arm_hard_register_operand", {REG}}, \
2766 {"f_register_operand", {SUBREG, REG}}, \
2767 {"arm_add_operand", {SUBREG, REG, CONST_INT}}, \
2768 {"fpu_add_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2769 {"fpu_rhs_operand", {SUBREG, REG, CONST_DOUBLE}}, \
2770 {"arm_rhs_operand", {SUBREG, REG, CONST_INT}}, \
2771 {"arm_not_operand", {SUBREG, REG, CONST_INT}}, \
2772 {"reg_or_int_operand", {SUBREG, REG, CONST_INT}}, \
2773 {"index_operand", {SUBREG, REG, CONST_INT}}, \
2774 {"thumb_cmp_operand", {SUBREG, REG, CONST_INT}}, \
2775 {"offsettable_memory_operand", {MEM}}, \
2776 {"bad_signed_byte_operand", {MEM}}, \
2777 {"alignable_memory_operand", {MEM}}, \
2778 {"shiftable_operator", {PLUS, MINUS, AND, IOR, XOR}}, \
2779 {"minmax_operator", {SMIN, SMAX, UMIN, UMAX}}, \
2780 {"shift_operator", {ASHIFT, ASHIFTRT, LSHIFTRT, ROTATERT, MULT}}, \
2781 {"di_operand", {SUBREG, REG, CONST_INT, CONST_DOUBLE, MEM}}, \
2782 {"nonimmediate_di_operand", {SUBREG, REG, MEM}}, \
2783 {"soft_df_operand", {SUBREG, REG, CONST_DOUBLE, MEM}}, \
2784 {"nonimmediate_soft_df_operand", {SUBREG, REG, MEM}}, \
2785 {"load_multiple_operation", {PARALLEL}}, \
2786 {"store_multiple_operation", {PARALLEL}}, \
2787 {"equality_operator", {EQ, NE}}, \
2788 {"arm_comparison_operator", {EQ, NE, LE, LT, GE, GT, GEU, GTU, LEU, \
2789 LTU, UNORDERED, ORDERED, UNLT, UNLE, \
2791 {"arm_rhsm_operand", {SUBREG, REG, CONST_INT, MEM}}, \
2792 {"const_shift_operand", {CONST_INT}}, \
2793 {"multi_register_push", {PARALLEL}}, \
2794 {"cc_register", {REG}}, \
2795 {"logical_binary_operator", {AND, IOR, XOR}}, \
2796 {"dominant_cc_register", {REG}},
2798 /* Define this if you have special predicates that know special things
2799 about modes. Genrecog will warn about certain forms of
2800 match_operand without a mode; if the operand predicate is listed in
2801 SPECIAL_MODE_PREDICATES, the warning will be suppressed. */
2802 #define SPECIAL_MODE_PREDICATES \
2803 "cc_register", "dominant_cc_register",
2810 #endif /* ! GCC_ARM_H */
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