1 /* Definitions for GCC. Part of the machine description for CRIS.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
3 Contributed by Axis Communications. Written by Hans-Peter Nilsson.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* After the first "Node:" comment comes all preprocessor directives and
23 attached declarations described in the info files, the "Using and
24 Porting GCC" manual (uapgcc), in the same order as found in the "Target
25 macros" section in the gcc-2.9x CVS edition of 2000-03-17. FIXME: Not
26 really, but needs an update anyway.
28 There is no generic copy-of-uapgcc comment, you'll have to see uapgcc
29 for that. If applicable, there is a CRIS-specific comment. The order
30 of macro definitions follow the order in the manual. Every section in
31 the manual (node in the info pages) has an introductory `Node:
32 <subchapter>' comment. If no macros are defined for a section, only
33 the section-comment is present. */
35 /* Note that other header files (e.g. config/elfos.h, config/linux.h,
36 config/cris/linux.h and config/cris/aout.h) are responsible for lots of
37 settings not repeated below. This file contains general CRIS
38 definitions and definitions for the cris-*-elf subtarget. */
40 /* Replacement for REG_P since it does not match SUBREGs. Happens for
41 testcase Axis-20000320 with gcc-2.9x. */
43 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (XEXP (x, 0))))
45 /* Last register in main register bank r0..r15. */
46 #define CRIS_LAST_GENERAL_REGISTER 15
48 /* Descriptions of registers used for arguments. */
49 #define CRIS_FIRST_ARG_REG 10
50 #define CRIS_MAX_ARGS_IN_REGS 4
52 /* Other convenience definitions. */
53 #define CRIS_PC_REGNUM 15
54 #define CRIS_SRP_REGNUM 16
56 /* Most of the time, we need the index into the register-names array.
57 When passing debug-info, we need the real register number. */
58 #define CRIS_CANONICAL_SRP_REGNUM (16 + 11)
59 #define CRIS_CANONICAL_MOF_REGNUM (16 + 7)
61 /* When generating PIC, these suffixes are added to the names of non-local
62 functions when being output. Contrary to other ports, we have offsets
63 relative to the GOT, not the PC. We might implement PC-relative PLT
64 semantics later for the general case; they are used in some cases right
65 now, such as MI thunks. */
66 #define CRIS_GOTPLT_SUFFIX ":GOTPLT"
67 #define CRIS_PLT_GOTOFFSET_SUFFIX ":PLTG"
68 #define CRIS_PLT_PCOFFSET_SUFFIX ":PLT"
70 /* If you tweak this, don't forget to check cris_expand_builtin_va_arg. */
71 #define CRIS_FUNCTION_ARG_SIZE(MODE, TYPE) \
72 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \
73 : (unsigned) int_size_in_bytes (TYPE))
75 /* Check for max allowed stackframe. A "const char *" to be parsed. */
76 extern const char *cris_max_stackframe_str;
78 /* Which CPU version this is. A "const char *" to be parsed. */
79 extern const char *cris_cpu_str;
81 /* Which CPU version this is. The parsed and adjusted cris_cpu_str. */
82 extern int cris_cpu_version;
84 /* Which CPU version to tune for. A "const char *" to be parsed. */
85 extern const char *cris_tune_str;
87 /* The argument to "-melinux-stacksize=". We don't parse it currently;
88 it's just passed on to the linker. We might want to do something
90 extern const char *cris_elinux_stacksize_str;
92 /* Changing the order used to be necessary to put the fourth __make_dp
93 argument (a DImode parameter) in registers, to fit with the libfunc
94 parameter passing scheme used for intrinsic functions. FIXME: Check
95 performance and maybe remove definition from TARGET_LIBGCC2_CFLAGS now
96 that it isn't strictly necessary. We used to do this through
97 TARGET_LIBGCC2_CFLAGS, but that became increasingly difficult as the
98 parenthesis (that needed quoting) travels through several layers of
99 make and shell invocations. */
101 #define __make_dp(a,b,c,d) __cris_make_dp(d,a,b,c)
107 /* When using make with defaults.mak for Sun this will handily remove
108 any "-target sun*" switches. */
109 /* We need to override any previous definitions (linux.h) */
110 #undef WORD_SWITCH_TAKES_ARG
111 #define WORD_SWITCH_TAKES_ARG(STR) \
112 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
113 || !strcmp (STR, "target"))
115 /* Also provide canonical vN definitions when user specifies an alias.
116 Note that -melf overrides -maout. */
119 "%{mtune=*:-D__tune_%* %{mtune=v*:-D__CRIS_arch_tune=%*}}\
120 %{mtune=etrax4:-D__tune_v3 -D__CRIS_arch_tune=3}\
121 %{mtune=etrax100:-D__tune_v8 -D__CRIS_arch_tune=8}\
122 %{mtune=svinto:-D__tune_v8 -D__CRIS_arch_tune=8}\
123 %{mtune=etrax100lx:-D__tune_v10 -D__CRIS_arch_tune=10}\
124 %{mtune=ng:-D__tune_v10 -D__CRIS_arch_tune=10}\
125 %{mcpu=*:-D__arch_%* %{mcpu=v*:-D__CRIS_arch_version=%*}}\
126 %{mcpu=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
127 %{mcpu=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
128 %{mcpu=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
129 %{mcpu=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
130 %{mcpu=ng:-D__arch_v10 -D__CRIS_arch_version=10}\
131 %{march=*:-D__arch_%* %{march=v*:-D__CRIS_arch_version=%*}}\
132 %{march=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
133 %{march=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
134 %{march=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
135 %{march=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
136 %{march=ng:-D__arch_v10 -D__CRIS_arch_version=10}\
137 %{metrax100:-D__arch__v8 -D__CRIS_arch_version=8}\
138 %{metrax4:-D__arch__v3 -D__CRIS_arch_version=3}\
141 /* For the cris-*-elf subtarget. */
142 #define CRIS_CPP_SUBTARGET_SPEC \
143 "%{mbest-lib-options:\
144 %{!moverride-best-lib-options:\
145 %{!march=*:%{!metrax*:%{!mcpu=*:-D__tune_v10 -D__CRIS_arch_tune=10}}}}}"
147 /* Remove those Sun-make "target" switches. */
148 /* Override previous definitions (linux.h). */
152 %{metrax4:-march=v3}\
153 %{metrax100:-march=v8}\
156 /* For the cris-*-elf subtarget. */
157 #define CRIS_CC1_SUBTARGET_SPEC \
159 %{mbest-lib-options:\
160 %{!moverride-best-lib-options:\
161 %{!march=*:%{!mcpu=*:-mtune=v10 -D__CRIS_arch_tune=10}}\
162 %{!finhibit-size-directive:\
163 %{!fno-function-sections: -ffunction-sections}\
164 %{!fno-data-sections: -fdata-sections}}}}"
166 /* This adds to CC1_SPEC. When bugs are removed from -fvtable-gc
167 (-fforce-addr causes invalid .vtable_entry asm in tinfo.cc and
168 nothing at all works in GCC 3.0-pre), add this line:
169 "%{mbest-lib-options:%{!moverride-best-lib-options:\
170 %{!melinux:%{!maout|melf:%{!fno-vtable-gc:-fvtable-gc}}}}}". */
171 #define CC1PLUS_SPEC ""
173 /* Override previous definitions (linux.h). */
179 /* For the cris-*-elf subtarget. */
180 #define CRIS_ASM_SUBTARGET_SPEC "--em=criself"
182 /* FIXME: We should propagate the -melf option to make the criself
183 "emulation" unless a linker script is provided (-T*), but I don't know
184 how to do that if either of -Ttext, -Tdata or -Tbss is given but no
185 linker script, as is usually the case. Leave it to the user for the
188 Note that -melf overrides -maout except that a.out-compiled libraries
189 are linked in (multilibbing). The somewhat cryptic -rpath-link pair is
190 to avoid *only* picking up the linux multilib subdir from the "-B./"
191 option during build, while still giving it preference. We'd need some
192 %s-variant that checked for existence of some specific file. */
193 /* Override previous definitions (svr4.h). */
199 /* For the cris-*-elf subtarget. */
200 #define CRIS_LINK_SUBTARGET_SPEC \
202 %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\
203 %{!r:%{O2|O3: --gc-sections}}"
205 /* Which library to get. The only difference from the default is to get
206 libsc.a if -sim is given to the driver. Repeat -lc -lsysX
207 {X=sim,linux}, because libsysX needs (at least) errno from libc, and
208 then we want to resolve new unknowns in libc against libsysX, not
210 /* Override previous definitions (linux.h). */
213 "%{sim*:-lc -lsyssim -lc -lsyssim}\
215 %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\
218 /* Linker startfile options; crt0 flavors.
220 At the moment there are no gcrt0.o or mcrt0.o, but keep them here and
221 link them to crt0.o to be prepared. Use scrt0.c if running the
222 simulator, linear style, or s2crt0.c if fixed style. */
223 /* We need to remove any previous definition (elfos.h). */
224 #undef STARTFILE_SPEC
225 #define STARTFILE_SPEC \
227 %{!sim2:%{sim:scrt0.o%s}\
228 %{!sim:%{pg:gcrt0.o%s}\
229 %{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
233 #define ENDFILE_SPEC "crtend.o%s"
235 #define EXTRA_SPECS \
236 {"cpp_subtarget", CRIS_CPP_SUBTARGET_SPEC}, \
237 {"cc1_subtarget", CRIS_CC1_SUBTARGET_SPEC}, \
238 {"asm_subtarget", CRIS_ASM_SUBTARGET_SPEC}, \
239 {"link_subtarget", CRIS_LINK_SUBTARGET_SPEC}, \
240 CRIS_SUBTARGET_EXTRA_SPECS
242 #define CRIS_SUBTARGET_EXTRA_SPECS
245 /* Node: Run-time Target */
247 #define TARGET_CPU_CPP_BUILTINS() \
250 builtin_define_std ("cris"); \
251 builtin_define_std ("CRIS"); \
252 builtin_define_std ("GNU_CRIS"); \
253 builtin_define ("__CRIS_ABI_version=2"); \
257 /* This needs to be at least 32 bits. */
258 extern int target_flags;
260 /* Currently this just affects aligment. FIXME: Redundant with
261 TARGET_ALIGN_BY_32, or put machine stuff here? */
262 #define TARGET_MASK_SVINTO 1
263 #define TARGET_SVINTO (target_flags & TARGET_MASK_SVINTO)
265 /* If to use condition-codes generated by insns other than the
266 immediately preceding compare/test insn.
267 Used to check for errors in notice_update_cc. */
268 #define TARGET_MASK_CCINIT 2
269 #define TARGET_CCINIT (target_flags & TARGET_MASK_CCINIT)
272 #define TARGET_MASK_PDEBUG 4
273 #define TARGET_PDEBUG (target_flags & TARGET_MASK_PDEBUG)
275 /* If to use side-effect patterns. Used to debug the [rx=ry+i] type
277 #define TARGET_MASK_SIDE_EFFECT_PREFIXES 8
278 #define TARGET_SIDE_EFFECT_PREFIXES \
279 (target_flags & TARGET_MASK_SIDE_EFFECT_PREFIXES)
281 /* If to expand mul into mstep. Only used when making libc.a. */
282 #define TARGET_MASK_EXPAND_MUL 16
283 #define TARGET_EXPAND_MUL (target_flags & TARGET_MASK_EXPAND_MUL)
285 /* If to *keep* (not force) alignment of stack at 16 bits. */
286 #define TARGET_MASK_STACK_ALIGN 32
287 #define TARGET_STACK_ALIGN (target_flags & TARGET_MASK_STACK_ALIGN)
289 /* If to do alignment on individual non-modifiable objects. */
290 #define TARGET_MASK_CONST_ALIGN 64
291 #define TARGET_CONST_ALIGN (target_flags & TARGET_MASK_CONST_ALIGN)
293 /* If to do alignment on individual modifiable objects. */
294 #define TARGET_MASK_DATA_ALIGN 128
295 #define TARGET_DATA_ALIGN (target_flags & TARGET_MASK_DATA_ALIGN)
297 /* If not to omit function prologue and epilogue. */
298 #define TARGET_MASK_PROLOGUE_EPILOGUE 256
299 #define TARGET_PROLOGUE_EPILOGUE (target_flags & TARGET_MASK_PROLOGUE_EPILOGUE)
301 /* Instructions additions from Etrax 4 and up.
302 (Just "lz", which we don't really generate from GCC -- yet). */
303 #define TARGET_MASK_ETRAX4_ADD 512
304 #define TARGET_ETRAX4_ADD (target_flags & TARGET_MASK_ETRAX4_ADD)
306 /* Say that all alignment specifications say to prefer 32 rather
308 #define TARGET_MASK_ALIGN_BY_32 1024
309 #define TARGET_ALIGN_BY_32 (target_flags & TARGET_MASK_ALIGN_BY_32)
311 /* This condition is of limited use, as gcc is riddled with #ifdef:s
312 controlling this, rather than if (...):s. */
313 #define TARGET_MASK_ELF 2048
314 #define TARGET_ELF (target_flags & TARGET_MASK_ELF)
316 /* Currently just used to error-check other options. Note that this is
317 *not* set for -melinux. */
318 #define TARGET_MASK_LINUX 4096
319 #define TARGET_LINUX (target_flags & TARGET_MASK_LINUX)
321 /* There's a small setup cost with using GOTPLT references, but should
322 in total be a win both in code-size and execution-time. */
323 #define TARGET_MASK_AVOID_GOTPLT 8192
324 #define TARGET_AVOID_GOTPLT (target_flags & TARGET_MASK_AVOID_GOTPLT)
326 #define TARGET_SWITCHES \
328 /* No "no-etrax" as it does not really imply any model. \
329 On the other hand, "etrax" implies the common (and large) \
330 subset matching all models. */ \
331 {"etrax4", TARGET_MASK_ETRAX4_ADD, \
332 N_("Compile for ETRAX 4 (CRIS v3)")}, \
333 {"no-etrax4", -TARGET_MASK_ETRAX4_ADD, ""}, \
334 {"etrax100", (TARGET_MASK_SVINTO \
335 + TARGET_MASK_ETRAX4_ADD \
336 + TARGET_MASK_ALIGN_BY_32), \
337 N_("Compile for ETRAX 100 (CRIS v8)")}, \
338 {"no-etrax100", -(TARGET_MASK_SVINTO \
339 + TARGET_MASK_ETRAX4_ADD), ""}, \
340 {"pdebug", TARGET_MASK_PDEBUG, \
341 N_("Emit verbose debug information in assembly code")}, \
342 {"no-pdebug", -TARGET_MASK_PDEBUG, ""}, \
343 {"cc-init", TARGET_MASK_CCINIT, \
344 N_("Do not use condition codes from normal instructions")}, \
345 {"no-cc-init", -TARGET_MASK_CCINIT, ""}, \
346 {"side-effects", TARGET_MASK_SIDE_EFFECT_PREFIXES, ""}, \
347 {"no-side-effects", -TARGET_MASK_SIDE_EFFECT_PREFIXES, \
348 N_("Do not emit addressing modes with side-effect assignment")}, \
349 {"stack-align", TARGET_MASK_STACK_ALIGN, ""}, \
350 {"no-stack-align", -TARGET_MASK_STACK_ALIGN, \
351 N_("Do not tune stack alignment")}, \
352 {"data-align", TARGET_MASK_DATA_ALIGN, ""}, \
353 {"no-data-align", -TARGET_MASK_DATA_ALIGN, \
354 N_("Do not tune writable data alignment")}, \
355 {"const-align", TARGET_MASK_CONST_ALIGN, ""}, \
356 {"no-const-align", -TARGET_MASK_CONST_ALIGN, \
357 N_("Do not tune code and read-only data alignment")}, \
358 {"32-bit", (TARGET_MASK_STACK_ALIGN \
359 + TARGET_MASK_CONST_ALIGN \
360 + TARGET_MASK_DATA_ALIGN \
361 + TARGET_MASK_ALIGN_BY_32), ""}, \
362 {"32bit", (TARGET_MASK_STACK_ALIGN \
363 + TARGET_MASK_CONST_ALIGN \
364 + TARGET_MASK_DATA_ALIGN \
365 + TARGET_MASK_ALIGN_BY_32), \
366 N_("Align code and data to 32 bits")}, \
367 {"16-bit", (TARGET_MASK_STACK_ALIGN \
368 + TARGET_MASK_CONST_ALIGN \
369 + TARGET_MASK_DATA_ALIGN), ""}, \
370 {"16bit", (TARGET_MASK_STACK_ALIGN \
371 + TARGET_MASK_CONST_ALIGN \
372 + TARGET_MASK_DATA_ALIGN), ""}, \
373 {"8-bit", -(TARGET_MASK_STACK_ALIGN \
374 + TARGET_MASK_CONST_ALIGN \
375 + TARGET_MASK_DATA_ALIGN), ""}, \
376 {"8bit", -(TARGET_MASK_STACK_ALIGN \
377 + TARGET_MASK_CONST_ALIGN \
378 + TARGET_MASK_DATA_ALIGN), \
379 N_("Don't align items in code or data")}, \
380 {"prologue-epilogue", TARGET_MASK_PROLOGUE_EPILOGUE, ""}, \
381 {"no-prologue-epilogue", -TARGET_MASK_PROLOGUE_EPILOGUE, \
382 N_("Do not emit function prologue or epilogue")}, \
383 /* We have to handle this m-option here since we can't wash it off in \
384 both CC1_SPEC and CC1PLUS_SPEC. */ \
385 {"best-lib-options", 0, \
386 N_("Use the most feature-enabling options allowed by other options")}, \
388 /* We must call it "override-" since calling it "no-" will cause \
389 gcc.c to forget it, if there's a "later" -mbest-lib-options. \
390 Kludgy, but needed for some multilibbed files. */ \
391 {"override-best-lib-options", 0, \
392 N_("Override -mbest-lib-options")}, \
393 CRIS_SUBTARGET_SWITCHES \
394 {"", TARGET_DEFAULT | CRIS_SUBTARGET_DEFAULT, ""}} \
396 /* For the cris-*-elf subtarget. */
397 #define CRIS_SUBTARGET_SWITCHES \
400 /* Default target_flags if no switches specified. */
401 #ifndef TARGET_DEFAULT
402 # define TARGET_DEFAULT \
403 (TARGET_MASK_SIDE_EFFECT_PREFIXES + TARGET_MASK_STACK_ALIGN \
404 + TARGET_MASK_CONST_ALIGN + TARGET_MASK_DATA_ALIGN \
405 + TARGET_MASK_PROLOGUE_EPILOGUE)
408 /* For the cris-*-elf subtarget. */
409 #define CRIS_SUBTARGET_DEFAULT TARGET_MASK_ELF
411 #define CRIS_CPU_BASE 0
412 #define CRIS_CPU_ETRAX4 3 /* Just lz added. */
413 #define CRIS_CPU_SVINTO 8 /* Added swap, jsrc & Co., 32-bit accesses. */
414 #define CRIS_CPU_NG 10 /* Added mul[su]. */
416 /* Local, providing a default for cris_cpu_version. */
417 #define CRIS_DEFAULT_CPU_VERSION CRIS_CPU_BASE
419 #define TARGET_HAS_MUL_INSNS (cris_cpu_version >= CRIS_CPU_NG)
421 #define TARGET_OPTIONS \
422 {{"cpu=", &cris_cpu_str, "", 0}, \
423 {"arch=", &cris_cpu_str, \
424 N_("Generate code for the specified chip or CPU version"), 0}, \
425 {"tune=", &cris_tune_str, \
426 N_("Tune alignment for the specified chip or CPU version"), 0}, \
427 {"max-stackframe=", &cris_max_stackframe_str, \
428 N_("Warn when a stackframe is larger than the specified size"), 0}, \
429 CRIS_SUBTARGET_LONG_OPTIONS \
430 {"ax-stackframe=", &cris_max_stackframe_str, "", 0} }
432 #define CRIS_SUBTARGET_LONG_OPTIONS
434 /* Print subsidiary information on the compiler version in use.
435 Do not use VD.D syntax (D=digit), since this will cause confusion
436 with the base gcc version among users, when we ask which version of
437 gcc-cris they are using. Please use some flavor of "R<number>" for
438 the version (no need for major.minor versions, I believe). */
439 #define TARGET_VERSION \
440 fprintf (stderr, " [Axis CRIS%s]", CRIS_SUBTARGET_VERSION)
442 /* For the cris-*-elf subtarget. */
443 #define CRIS_SUBTARGET_VERSION " - generic ELF"
445 #define OVERRIDE_OPTIONS cris_override_options ()
447 /* The following gives optimal code for gcc-2.7.2, but *may* be subject
448 to change. Omitting flag_force_addr gives .1-.7% faster code for gcc
449 *only*, but 1.3% larger code. On ipps it gives 5.3-10.6% slower
450 code(!) and 0.3% larger code. For products, images gets .1-1.8%
451 larger. Do not set strict aliasing from optimization options. */
452 #define OPTIMIZATION_OPTIONS(OPTIMIZE, SIZE) \
455 if ((OPTIMIZE) >= 2 || (SIZE)) \
457 flag_force_addr = 1; \
458 flag_omit_frame_pointer = 1; \
464 /* Node: Storage Layout */
466 #define BITS_BIG_ENDIAN 0
468 #define BYTES_BIG_ENDIAN 0
470 /* WORDS_BIG_ENDIAN is not defined in the hardware, but for consistency,
471 we use little-endianness, and we may also be able to use
472 post-increment on DImode indirect. */
473 #define WORDS_BIG_ENDIAN 0
475 #define UNITS_PER_WORD 4
477 /* A combination of defining PROMOTE_MODE, PROMOTE_FUNCTION_ARGS,
478 PROMOTE_FOR_CALL_ONLY and *not* defining PROMOTE_PROTOTYPES gives the
479 best code size and speed for gcc, ipps and products in gcc-2.7.2. */
480 #define CRIS_PROMOTED_MODE(MODE, UNSIGNEDP, TYPE) \
481 (GET_MODE_CLASS (MODE) == MODE_INT && GET_MODE_SIZE (MODE) < 4) \
484 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
485 (MODE) = CRIS_PROMOTED_MODE (MODE, UNSIGNEDP, TYPE)
487 #define PROMOTE_FUNCTION_ARGS
489 /* Defining PROMOTE_FUNCTION_RETURN in gcc-2.7.2 uncovers bug 981110 (even
490 if defining FUNCTION_VALUE with MODE as PROMOTED_MODE ;-)
492 FIXME: Report this when cris.h is part of GCC, so others can easily
493 see the problem. Maybe check other systems that define
494 PROMOTE_FUNCTION_RETURN. */
495 #define PROMOTE_FOR_CALL_ONLY
497 /* We will be using prototype promotion, so they will be 32 bit. */
498 #define PARM_BOUNDARY 32
500 /* Stack boundary is guided by -mstack-align, -mno-stack-align,
502 Old comment: (2.1: still valid in 2.7.2?)
503 Note that to make this macro affect the alignment of stack
504 locals, a fix was required, and special precautions when handling
505 the stack pointer in various other macros (TARGET_ASM_FUNCTION_PROLOGUE
506 et al) were required. See file "function.c". If you would just define
507 this macro, it would only affect the builtin alloca and variable
508 local data (non-ANSI, non-K&R, Gnu C extension). */
509 #define STACK_BOUNDARY \
510 (TARGET_STACK_ALIGN ? (TARGET_ALIGN_BY_32 ? 32 : 16) : 8)
512 #define FUNCTION_BOUNDARY 16
514 /* Do not change BIGGEST_ALIGNMENT (when optimizing), as it will affect
515 strange places, at least in 2.1. */
516 #define BIGGEST_ALIGNMENT 8
518 /* If -m16bit, -m16-bit, -malign or -mdata-align,
519 align everything to 16 bit. */
520 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
522 ? (TARGET_ALIGN_BY_32 \
523 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \
524 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
526 /* Note that CONSTANT_ALIGNMENT has the effect of making gcc believe that
527 ALL references to constant stuff (in code segment, like strings) has
528 this alignment. That is a rather rushed assumption. Luckily we do not
529 care about the "alignment" operand to builtin memcpy (only place where
530 it counts), so it doesn't affect any bad spots. */
531 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
532 (TARGET_CONST_ALIGN \
533 ? (TARGET_ALIGN_BY_32 \
534 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \
535 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
537 /* FIXME: Define LOCAL_ALIGNMENT for word and dword or arrays and
538 structures (if -mstack-align=), and check that it is good. */
540 #define EMPTY_FIELD_BOUNDARY 8
542 #define STRUCTURE_SIZE_BOUNDARY 8
544 #define STRICT_ALIGNMENT 0
546 /* Remove any previous definition (elfos.h).
547 ??? If it wasn't for all the other stuff that affects layout of
548 structures and bit-fields, this could presumably cause incompatibility
549 with other GNU/Linux ports (i.e. elfos.h users). */
550 #undef PCC_BITFIELD_TYPE_MATTERS
552 /* This is only used for non-scalars. Strange stuff happens to structs
553 (FIXME: What?) if we use anything larger than largest actually used
554 datum size, so lets make it 32. The type "long long" will still work
555 as usual. We can still have DImode insns, but they will only be used
556 for scalar data (i.e. long long). */
557 #define MAX_FIXED_MODE_SIZE 32
560 /* Node: Type Layout */
562 /* Note that DOUBLE_TYPE_SIZE is not defined anymore, since the default
563 value gives a 64-bit double, which is what we now use. */
565 /* For compatibility and historical reasons, a char should be signed. */
566 #define DEFAULT_SIGNED_CHAR 1
568 /* No DEFAULT_SHORT_ENUMS, please. */
570 /* Note that WCHAR_TYPE_SIZE is used in cexp.y,
571 where TARGET_SHORT is not available. */
573 #define WCHAR_TYPE "long int"
575 #undef WCHAR_TYPE_SIZE
576 #define WCHAR_TYPE_SIZE 32
579 /* Node: Register Basics */
581 /* We count all 16 non-special registers, SRP and a faked argument
583 #define FIRST_PSEUDO_REGISTER (16 + 1 + 1)
585 /* For CRIS, these are r15 (pc) and r14 (sp). Register r8 is used as a
586 frame-pointer, but is not fixed. SRP is not included in general
587 registers and will not be used automatically. All other special
588 registers are fixed at the moment. The faked argument pointer register
590 #define FIXED_REGISTERS \
591 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1}
593 /* Register r9 is used for structure-address, r10-r13 for parameters,
594 r10- for return values. */
595 #define CALL_USED_REGISTERS \
596 {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1}
598 #define CONDITIONAL_REGISTER_USAGE cris_conditional_register_usage ()
601 /* Node: Allocation Order */
603 /* We need this on CRIS, because call-used regs should be used first,
604 (so we don't need to push). Else start using registers from r0 and up.
605 This preference is mainly because if we put call-used-regs from r0
606 and up, then we can't use movem to push the rest, (which have to be
607 saved if we use them, and movem has to start with r0).
608 Change here if you change which registers to use as call registers.
610 The actual need to explicitly prefer call-used registers improved the
611 situation a lot for 2.1, but might not actually be needed anymore.
612 Still, this order reflects what GCC should find out by itself, so it
613 probably does not hurt.
615 Order of preference: Call-used-regs first, then r0 and up, last fp &
617 Call-used regs in opposite order, so they will cause less conflict if
618 a function has few args (<= 3) and it wants a scratch reg.
619 Use struct-return address first, since very few functions use
620 structure return values so it is likely to be available. */
621 #define REG_ALLOC_ORDER \
622 {9, 13, 12, 11, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15, 16, 17}
625 /* Node: Values in Registers */
627 /* The VOIDmode test is so we can omit mode on anonymous insns. FIXME:
628 Still needed in 2.9x, at least for Axis-20000319. */
629 #define HARD_REGNO_NREGS(REGNO, MODE) \
631 ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
633 /* CRIS permits all registers to hold all modes. */
634 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
636 #define MODES_TIEABLE_P(MODE1, MODE2) 1
639 /* Node: Leaf Functions */
640 /* (no definitions) */
642 /* Node: Stack Registers */
643 /* (no definitions) */
646 /* Node: Register Classes */
648 /* CRIS has only one kind of registers, so NO_REGS and ALL_REGS
649 are the only classes. FIXME: It actually makes sense to have another
650 class for special registers, and yet another class for the
651 multiply-overflow register in v10; then a class for the return
652 register also makes sense. */
653 enum reg_class {NO_REGS, ALL_REGS, LIM_REG_CLASSES};
655 #define N_REG_CLASSES (int) LIM_REG_CLASSES
657 #define REG_CLASS_NAMES {"NO_REGS", "ALL_REGS"}
659 #define GENERAL_REGS ALL_REGS
661 /* Count in the faked argument register in GENERAL_REGS. Keep out SRP. */
662 #define REG_CLASS_CONTENTS {{0}, {0x2ffff}}
664 #define REGNO_REG_CLASS(REGNO) GENERAL_REGS
666 #define BASE_REG_CLASS GENERAL_REGS
668 #define INDEX_REG_CLASS GENERAL_REGS
670 /* Get reg_class from a letter such as appears in the machine
671 description. No letters are used, since 'r' is used for any
673 #define REG_CLASS_FROM_LETTER(C) NO_REGS
675 /* Since it uses reg_renumber, it is safe only once reg_renumber
676 has been allocated, which happens in local-alloc.c. */
677 #define REGNO_OK_FOR_BASE_P(REGNO) \
678 ((REGNO) <= CRIS_LAST_GENERAL_REGISTER \
679 || (REGNO) == ARG_POINTER_REGNUM \
680 || (unsigned) reg_renumber[REGNO] <= CRIS_LAST_GENERAL_REGISTER \
681 || (unsigned) reg_renumber[REGNO] == ARG_POINTER_REGNUM)
683 /* See REGNO_OK_FOR_BASE_P. */
684 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO)
686 /* It seems like gcc (2.7.2 and 2.9x of 2000-03-22) may send "NO_REGS" as
687 the class for a constant (testcase: __Mul in arit.c). To avoid forcing
688 out a constant into the constant pool, we will trap this case and
689 return something a bit more sane. FIXME: Check if this is a bug. */
690 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
691 ((CLASS) == NO_REGS ? GENERAL_REGS : (CLASS))
693 /* For CRIS, this is always the size of MODE in words,
694 since all registers are the same size. To use omitted modes in
695 patterns with reload constraints, you must say the widest size
696 which is allowed for VOIDmode.
697 FIXME: Does that still apply for gcc-2.9x? Keep poisoned until such
698 patterns are added back. News: 2001-03-16: Happens as early as the
700 #define CLASS_MAX_NREGS(CLASS, MODE) \
701 ((MODE) == VOIDmode \
702 ? 1 /* + cris_fatal ("CLASS_MAX_NREGS with VOIDmode") */ \
703 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
705 /* We are now out of letters; we could use ten more. This forces us to
706 use C-code in the 'md' file. FIXME: Use some EXTRA_CONSTRAINTS. */
707 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
709 /* MOVEQ, CMPQ, ANDQ, ORQ. */ \
710 (C) == 'I' ? (VALUE) >= -32 && (VALUE) <= 31 : \
712 (C) == 'J' ? (VALUE) >= 0 && (VALUE) <= 63 : \
713 /* ASRQ, BTSTQ, LSRQ, LSLQ. */ \
714 (C) == 'K' ? (VALUE) >= 0 && (VALUE) <= 31 : \
715 /* A 16-bit signed number. */ \
716 (C) == 'L' ? (VALUE) >= -32768 && (VALUE) <= 32767 : \
717 /* The constant 0 for CLEAR. */ \
718 (C) == 'M' ? (VALUE) == 0 : \
719 /* A negative ADDQ or SUBQ. */ \
720 (C) == 'N' ? (VALUE) >= -63 && (VALUE) < 0 : \
721 /* Quickened ints, QI and HI. */ \
722 (C) == 'O' ? (VALUE) >= 0 && (VALUE) <= 65535 \
723 && ((VALUE) >= (65535-31) \
724 || ((VALUE) >= (255-31) \
725 && (VALUE) <= 255 )) : \
726 /* A 16-bit number signed *or* unsigned. */ \
727 (C) == 'P' ? (VALUE) >= -32768 && (VALUE) <= 65535 : \
730 /* It is really simple to make up a 0.0; it is the same as int-0 in
732 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
733 ((C) == 'G' && ((VALUE) == CONST0_RTX (DFmode) \
734 || (VALUE) == CONST0_RTX (SFmode)))
736 /* We need this on cris to distinguish delay-slottable addressing modes. */
737 #define EXTRA_CONSTRAINT(X, C) \
739 /* Slottable address mode? */ \
740 (C) == 'Q' ? EXTRA_CONSTRAINT_Q (X) : \
741 /* Operand to BDAP or BIAP? */ \
742 (C) == 'R' ? EXTRA_CONSTRAINT_R (X) : \
743 /* A local PIC symbol? */ \
744 (C) == 'S' ? EXTRA_CONSTRAINT_S (X) : \
745 /* A three-address addressing-mode? */ \
746 (C) == 'T' ? EXTRA_CONSTRAINT_T (X) : \
747 /* A global PIC symbol? */ \
748 (C) == 'U' ? EXTRA_CONSTRAINT_U (X) : \
751 #define EXTRA_CONSTRAINT_Q(X) \
753 /* Slottable addressing modes: \
754 A register? FIXME: Unnecessary. */ \
755 (BASE_P (X) && REGNO (X) != CRIS_PC_REGNUM) \
756 /* Indirect register: [reg]? */ \
757 || (GET_CODE (X) == MEM && BASE_P (XEXP (X, 0)) \
758 && REGNO (XEXP (X, 0)) != CRIS_PC_REGNUM) \
761 #define EXTRA_CONSTRAINT_R(X) \
763 /* An operand to BDAP or BIAP: \
766 /* A [reg] or (int) [reg], maybe with post-increment. */ \
767 || BDAP_INDEX_P (X) \
768 || CONSTANT_INDEX_P (X) \
771 #define EXTRA_CONSTRAINT_T(X) \
773 /* Memory three-address operand. All are indirect-memory: */ \
774 GET_CODE (X) == MEM \
775 && ((GET_CODE (XEXP (X, 0)) == MEM \
776 /* Double indirect: [[reg]] or [[reg+]]? */ \
777 && (BASE_OR_AUTOINCR_P (XEXP (XEXP (X, 0), 0)))) \
778 /* Just an explicit indirect reference: [const]? */ \
779 || CONSTANT_P (XEXP (X, 0)) \
780 /* Something that is indexed; [...+...]? */ \
781 || (GET_CODE (XEXP (X, 0)) == PLUS \
782 /* A BDAP constant: [reg+(8|16|32)bit offset]? */ \
783 && ((BASE_P (XEXP (XEXP (X, 0), 0)) \
784 && CONSTANT_INDEX_P (XEXP (XEXP (X, 0), 1))) \
785 /* Swap arguments to the above. FIXME: gcc-2.9x? */ \
786 || (BASE_P (XEXP (XEXP (X, 0), 1)) \
787 && CONSTANT_INDEX_P (XEXP (XEXP (X, 0), 0))) \
788 /* A BDAP register: [reg+[reg(+)].S]? */ \
789 || (BASE_P (XEXP (XEXP (X, 0), 0)) \
790 && BDAP_INDEX_P(XEXP(XEXP(X, 0), 1))) \
791 /* Same, but with swapped arguments. */ \
792 || (BASE_P (XEXP (XEXP (X, 0), 1)) \
793 && BDAP_INDEX_P (XEXP (XEXP (X, 0), 0))) \
794 /* A BIAP: [reg+reg.S]. */ \
795 || (BASE_P (XEXP (XEXP (X, 0), 0)) \
796 && BIAP_INDEX_P (XEXP (XEXP (X, 0), 1))) \
797 /* Same, but with swapped arguments. */ \
798 || (BASE_P (XEXP (XEXP (X, 0), 1)) \
799 && BIAP_INDEX_P (XEXP (XEXP (X, 0), 0)))))) \
802 #define EXTRA_CONSTRAINT_S(X) \
803 (flag_pic && CONSTANT_P (X) && cris_gotless_symbol (X))
805 #define EXTRA_CONSTRAINT_U(X) \
806 (flag_pic && CONSTANT_P (X) && cris_got_symbol (X))
809 /* Node: Frame Layout */
811 #define STACK_GROWS_DOWNWARD
812 #define FRAME_GROWS_DOWNWARD
814 /* It seems to be indicated in the code (at least 2.1) that this is
815 better a constant, and best 0. */
816 #define STARTING_FRAME_OFFSET 0
818 #define FIRST_PARM_OFFSET(FNDECL) 0
820 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
821 cris_return_addr_rtx (COUNT, FRAMEADDR)
823 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, CRIS_SRP_REGNUM)
825 /* FIXME: Any __builtin_eh_return callers must not return anything and
826 there must not be collisions with incoming parameters. Luckily the
827 number of __builtin_eh_return callers is limited. For now return
828 parameter registers in reverse order and hope for the best. */
829 #define EH_RETURN_DATA_REGNO(N) \
830 (IN_RANGE ((N), 0, 3) ? (CRIS_FIRST_ARG_REG + 3 - (N)) : INVALID_REGNUM)
832 /* Store the stack adjustment in the structure-return-address register. */
833 #define CRIS_STACKADJ_REG STRUCT_VALUE_REGNUM
834 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, CRIS_STACKADJ_REG)
836 #define EH_RETURN_HANDLER_RTX \
837 cris_return_addr_rtx (0, NULL)
839 #define INIT_EXPANDERS cris_init_expanders ()
841 /* FIXME: Move this to right node (it's not documented properly yet). */
842 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (CRIS_SRP_REGNUM)
844 /* FIXME: Move this to right node (it's not documented properly yet).
845 FIXME: Check what alignment we can assume regarding
846 TARGET_STACK_ALIGN and TARGET_ALIGN_BY_32. */
847 #define DWARF_CIE_DATA_ALIGNMENT -1
849 /* If we would ever need an exact mapping between canonical register
850 number and dwarf frame register, we would either need to include all
851 registers in the gcc decription (with some marked fixed of course), or
852 an inverse mapping from dwarf register to gcc register. There is one
853 need in dwarf2out.c:expand_builtin_init_dwarf_reg_sizes. Right now, I
854 don't see that we need exact correspondence between DWARF *frame*
855 registers and DBX_REGISTER_NUMBER, so map them onto GCC registers. */
856 #define DWARF_FRAME_REGNUM(REG) (REG)
858 /* Node: Stack Checking */
859 /* (no definitions) FIXME: Check. */
861 /* Node: Frame Registers */
863 #define STACK_POINTER_REGNUM 14
865 /* Register used for frame pointer. This is also the last of the saved
866 registers, when a frame pointer is not used. */
867 #define FRAME_POINTER_REGNUM 8
869 /* Faked register, is always eliminated. We need it to eliminate
870 allocating stack slots for the return address and the frame pointer. */
871 #define ARG_POINTER_REGNUM 17
873 #define STATIC_CHAIN_REGNUM 7
876 /* Node: Elimination */
878 /* Really only needed if the stack frame has variable length (alloca
879 or variable sized local arguments (GNU C extension). */
880 #define FRAME_POINTER_REQUIRED 0
882 #define ELIMINABLE_REGS \
883 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
884 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
885 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
887 /* We need not worry about when the frame-pointer is required for other
889 #define CAN_ELIMINATE(FROM, TO) 1
891 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
892 (OFFSET) = cris_initial_elimination_offset (FROM, TO)
895 /* Node: Stack Arguments */
897 /* Since many parameters take up one register each in any case,
898 PROMOTE_PROTOTYPES would seem like a good idea, but measurements
899 indicate that a combination using PROMOTE_MODE is better. */
901 #define ACCUMULATE_OUTGOING_ARGS 1
903 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
906 /* Node: Register Arguments */
908 /* The void_type_node is sent as a "closing" call. We have to stop it
909 since it's invalid to FUNCTION_ARG_PASS_BY_REFERENCE (or was invalid at
911 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
912 ((CUM).regs < CRIS_MAX_ARGS_IN_REGS \
913 && (TYPE) != void_type_node \
914 && ! FUNCTION_ARG_PASS_BY_REFERENCE (CUM, MODE, TYPE, NAMED) \
915 ? gen_rtx (REG, MODE, (CRIS_FIRST_ARG_REG) + (CUM).regs) \
918 /* The differences between this and the previous, is that this one checks
919 that an argument is named, since incoming stdarg/varargs arguments are
920 pushed onto the stack, and we don't have to check against the "closing"
921 void_type_node TYPE parameter. */
922 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
923 (((NAMED) && (CUM).regs < CRIS_MAX_ARGS_IN_REGS \
924 && ! FUNCTION_ARG_PASS_BY_REFERENCE (CUM, MODE, TYPE, NAMED)) \
925 ? gen_rtx (REG, MODE, CRIS_FIRST_ARG_REG + (CUM).regs) \
928 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
929 (((CUM).regs == (CRIS_MAX_ARGS_IN_REGS - 1) \
930 && !MUST_PASS_IN_STACK (MODE, TYPE) \
931 && CRIS_FUNCTION_ARG_SIZE (MODE, TYPE) > 4 \
932 && CRIS_FUNCTION_ARG_SIZE (MODE, TYPE) <= 8) \
935 /* Structs may be passed by value, but they must not be more than 8
936 bytes long. If you tweak this, don't forget to adjust
937 cris_expand_builtin_va_arg. */
938 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
939 (MUST_PASS_IN_STACK (MODE, TYPE) \
940 || CRIS_FUNCTION_ARG_SIZE (MODE, TYPE) > 8) \
942 /* Contrary to what you'd believe, defining FUNCTION_ARG_CALLEE_COPIES
943 seems like a (small total) loss, at least for gcc-2.7.2 compiling and
944 running gcc-2.1 (small win in size, small loss running -- 100.1%),
945 and similarly for size for products (.1 .. .3% bloat, sometimes win).
946 Due to the empirical likeliness of making slower code, it is not
949 /* This no longer *needs* to be a structure; but keeping it as such should
950 not hurt (and hacking the ABI is simpler). */
951 #define CUMULATIVE_ARGS struct cum_args
952 struct cum_args {int regs;};
954 /* The regs member is an integer, the number of arguments got into
956 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL) \
959 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
961 = (FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
962 ? (CRIS_MAX_ARGS_IN_REGS) + 1 \
964 + (3 + (CRIS_FUNCTION_ARG_SIZE (MODE, TYPE))) / 4)))
966 #define FUNCTION_ARG_REGNO_P(REGNO) \
967 ((REGNO) >= CRIS_FIRST_ARG_REG \
968 && (REGNO) < CRIS_FIRST_ARG_REG + (CRIS_MAX_ARGS_IN_REGS))
971 /* Node: Scalar Return */
973 /* Let's assume all functions return in r[CRIS_FIRST_ARG_REG] for the
975 #define FUNCTION_VALUE(VALTYPE, FUNC) \
976 gen_rtx (REG, TYPE_MODE (VALTYPE), CRIS_FIRST_ARG_REG)
978 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, CRIS_FIRST_ARG_REG)
980 #define FUNCTION_VALUE_REGNO_P(N) ((N) == CRIS_FIRST_ARG_REG)
983 /* Node: Aggregate Return */
986 /* FIXME: Let's try this some time, so we return structures in registers.
987 We would cast the result of int_size_in_bytes to unsigned, so we will
988 get a huge number for "structures" of variable size (-1). */
989 #define RETURN_IN_MEMORY(TYPE) \
990 ((unsigned) int_size_in_bytes (TYPE) > CRIS_MAX_ARGS_IN_REGS * UNITS_PER_WORD)
993 #define STRUCT_VALUE_REGNUM ((CRIS_FIRST_ARG_REG) - 1)
996 /* Node: Caller Saves */
997 /* (no definitions) */
999 /* Node: Function entry */
1001 /* See cris.c for TARGET_ASM_FUNCTION_PROLOGUE and
1002 TARGET_ASM_FUNCTION_EPILOGUE. */
1004 /* If the epilogue uses the "ret" insn, we need to fill the
1006 #define DELAY_SLOTS_FOR_EPILOGUE cris_delay_slots_for_epilogue ()
1008 #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) \
1009 cris_eligible_for_epilogue_delay (INSN)
1011 /* Node: Profiling */
1013 #define FUNCTION_PROFILER(FILE, LABELNO) \
1014 error ("no FUNCTION_PROFILER for CRIS")
1016 /* FIXME: Some of the undefined macros might be mandatory. If so, fix
1022 /* We save the register number of the first anonymous argument in
1023 first_vararg_reg, and take care of this in the function prologue.
1024 This behavior is used by at least one more port (the ARM?), but
1025 may be unsafe when compiling nested functions. (With varargs? Hairy.)
1026 Note that nested-functions is a GNU C extension.
1028 FIXME: We can actually put the size in PRETEND and deduce the number
1029 of registers from it in the prologue and epilogue. */
1030 #define SETUP_INCOMING_VARARGS(ARGSSF, MODE, TYPE, PRETEND, SECOND) \
1033 if ((ARGSSF).regs < (CRIS_MAX_ARGS_IN_REGS)) \
1034 (PRETEND) = ((CRIS_MAX_ARGS_IN_REGS) - (ARGSSF).regs) * 4; \
1035 if (TARGET_PDEBUG) \
1037 fprintf (asm_out_file, \
1038 "\n; VA:: ANSI: %d args before, anon @ #%d, %dtime\n", \
1039 (ARGSSF).regs, PRETEND, SECOND); \
1044 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
1045 documented, although used by several targets. */
1046 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
1047 cris_expand_builtin_va_arg (VALIST, TYPE)
1050 /* Node: Trampolines */
1052 /* This looks too complicated, and it is. I assigned r7 to be the
1053 static chain register, but it is call-saved, so we have to save it,
1054 and come back to restore it after the call, so we have to save srp...
1055 Anyway, trampolines are rare enough that we can cope with this
1056 somewhat lack of elegance.
1057 (Do not be tempted to "straighten up" whitespace in the asms; the
1058 assembler #NO_APP state mandates strict spacing). */
1059 #define TRAMPOLINE_TEMPLATE(FILE) \
1062 fprintf (FILE, "\tmove.d $%s,[$pc+20]\n", \
1063 reg_names[STATIC_CHAIN_REGNUM]); \
1064 fprintf (FILE, "\tmove $srp,[$pc+22]\n"); \
1065 fprintf (FILE, "\tmove.d 0,$%s\n", \
1066 reg_names[STATIC_CHAIN_REGNUM]); \
1067 fprintf (FILE, "\tjsr 0\n"); \
1068 fprintf (FILE, "\tmove.d 0,$%s\n", \
1069 reg_names[STATIC_CHAIN_REGNUM]); \
1070 fprintf (FILE, "\tjump 0\n"); \
1074 #define TRAMPOLINE_SIZE 32
1076 /* CRIS wants instructions on word-boundary.
1077 Note that due to a bug (reported) in 2.7.2 and earlier, this is
1078 actually treated as alignment in _bytes_, not _bits_. (Obviously
1079 this is not fatal, only a slight waste of stack space). */
1080 #define TRAMPOLINE_ALIGNMENT 16
1082 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1085 emit_move_insn (gen_rtx (MEM, SImode, \
1086 plus_constant (TRAMP, 10)), \
1088 emit_move_insn (gen_rtx (MEM, SImode, \
1089 plus_constant (TRAMP, 16)), \
1094 /* Note that there is no need to do anything with the cache for sake of
1098 /* Node: Library Calls */
1100 #define MULSI3_LIBCALL "__Mul"
1101 #define DIVSI3_LIBCALL "__Div"
1102 #define UDIVSI3_LIBCALL "__Udiv"
1103 #define MODSI3_LIBCALL "__Mod"
1104 #define UMODSI3_LIBCALL "__Umod"
1106 /* If you change this, you have to check whatever libraries and systems
1108 #define TARGET_EDOM 33
1111 /* Node: Addressing Modes */
1113 #define HAVE_POST_INCREMENT 1
1115 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
1117 #define MAX_REGS_PER_ADDRESS 2
1119 /* There are helper macros defined here which are used only in
1120 GO_IF_LEGITIMATE_ADDRESS.
1122 Note that you *have to* reject invalid addressing modes for mode
1123 MODE, even if it is legal for normal addressing modes. You cannot
1124 rely on the constraints to do this work. They can only be used to
1125 doublecheck your intentions. One example is that you HAVE TO reject
1126 (mem:DI (plus:SI (reg:SI x) (reg:SI y))) because for some reason
1127 this cannot be reloaded. (Which of course you can argue that gcc
1128 should have done.) FIXME: Strange. Check. */
1130 /* No symbol can be used as an index (or more correct, as a base) together
1131 with a register with PIC; the PIC register must be there. */
1132 #define CONSTANT_INDEX_P(X) \
1133 (CONSTANT_P (X) && !(flag_pic && cris_symbol (X)))
1135 /* True if X is a valid base register. */
1137 (REG_P (X) && REG_OK_FOR_BASE_P (X))
1139 /* True if X is a valid base register with or without autoincrement. */
1140 #define BASE_OR_AUTOINCR_P(X) \
1141 (BASE_P (X) || (GET_CODE (X) == POST_INC && BASE_P (XEXP (X, 0))))
1143 /* True if X is a valid (register) index for BDAP, i.e. [Rs].S or [Rs+].S. */
1144 #define BDAP_INDEX_P(X) \
1145 ((GET_CODE (X) == MEM && GET_MODE (X) == SImode \
1146 && BASE_OR_AUTOINCR_P (XEXP (X, 0))) \
1147 || (GET_CODE (X) == SIGN_EXTEND \
1148 && GET_CODE (XEXP (X, 0)) == MEM \
1149 && (GET_MODE (XEXP (X, 0)) == HImode \
1150 || GET_MODE (XEXP (X, 0)) == QImode) \
1151 && BASE_OR_AUTOINCR_P (XEXP (XEXP (X, 0), 0))))
1153 /* True if X is a valid (register) index for BIAP, i.e. Rd.m. */
1154 #define BIAP_INDEX_P(X) \
1155 ((BASE_P (X) && REG_OK_FOR_INDEX_P (X)) \
1156 || (GET_CODE (X) == MULT \
1157 && BASE_P (XEXP (X, 0)) \
1158 && REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
1159 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1160 && (INTVAL (XEXP (X, 1)) == 2 \
1161 || INTVAL (XEXP (X, 1)) == 4)))
1163 /* True if X is an address that doesn't need a prefix i.e. [Rs] or [Rs+]. */
1164 #define SIMPLE_ADDRESS_P(X) \
1166 || (GET_CODE (X) == POST_INC \
1167 && BASE_P (XEXP (X, 0))))
1169 /* A PIC operand looks like a normal symbol here. At output we dress it
1170 in "[rPIC+symbol:GOT]" (global symbol) or "rPIC+symbol:GOTOFF" (local
1171 symbol) so we exclude all addressing modes where we can't replace a
1172 plain "symbol" with that. A global PIC symbol does not fit anywhere
1173 here (but is thankfully a general_operand in itself). A local PIC
1174 symbol is valid for the plain "symbol + offset" case. */
1175 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1178 if (SIMPLE_ADDRESS_P (X)) \
1180 if (CONSTANT_P (X) \
1182 || cris_gotless_symbol (X) \
1183 || ! cris_symbol (X))) \
1186 if (GET_CODE (X) == PLUS) \
1191 if ((BASE_P (x1) && CONSTANT_INDEX_P (x2)) \
1192 || (BASE_P (x2) && CONSTANT_INDEX_P (x1)) \
1193 /* BDAP Rs[+], Rd. */ \
1194 || (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \
1195 && ((BASE_P (x1) && BDAP_INDEX_P (x2)) \
1196 || (BASE_P (x2) && BDAP_INDEX_P (x1)) \
1197 /* BIAP.m Rs, Rd */ \
1198 || (BASE_P (x1) && BIAP_INDEX_P (x2)) \
1199 || (BASE_P (x2) && BIAP_INDEX_P (x1))))) \
1202 else if (GET_CODE (X) == MEM) \
1204 /* DIP (Rs). Reject [[reg+]] and [[reg]] for \
1205 DImode (long long). */ \
1206 if (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \
1207 && (BASE_P (XEXP (X, 0)) \
1208 || BASE_OR_AUTOINCR_P (XEXP (X, 0)))) \
1213 #ifndef REG_OK_STRICT
1214 /* Nonzero if X is a hard reg that can be used as a base reg
1215 or if it is a pseudo reg. */
1216 # define REG_OK_FOR_BASE_P(X) \
1217 (REGNO (X) <= CRIS_LAST_GENERAL_REGISTER \
1218 || REGNO (X) == ARG_POINTER_REGNUM \
1219 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1221 /* Nonzero if X is a hard reg that can be used as a base reg. */
1222 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1225 #ifndef REG_OK_STRICT
1226 /* Nonzero if X is a hard reg that can be used as an index
1227 or if it is a pseudo reg. */
1228 # define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1230 /* Nonzero if X is a hard reg that can be used as an index. */
1231 # define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
1234 /* For now, don't do anything. GCC does a good job most often.
1236 Maybe we could do something about gcc:s misbehavior when it
1237 recalculates frame offsets for local variables, from fp+offs to
1238 sp+offs. The resulting address expression gets screwed up
1239 sometimes, but I'm not sure that it may be fixed here, since it is
1240 already split up in several instructions (Is this still true?).
1241 FIXME: Check and adjust for gcc-2.9x. */
1242 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) {}
1244 /* Kludge to solve Axis-990219: Work around imperfection in
1245 reload_load_address1:
1246 (plus (sign_extend (mem:qi (reg))) (reg))
1247 should be reloaded as (plus (reg) (reg)), not
1248 (plus (sign_extend (reg)) (reg)).
1249 There are no checks that reload_load_address_1 "reloads"
1250 addresses correctly, so invalidness is not caught or
1252 When the right thing happens in reload, the kludge can
1253 be removed; still not as of 2003-02-27. */
1255 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1258 if (GET_CODE (X) == PLUS \
1259 && REG_P (XEXP (X, 1)) \
1260 && GET_CODE (XEXP (X, 0)) == SIGN_EXTEND \
1261 && GET_CODE (XEXP (XEXP (X, 0), 0)) == MEM \
1262 && (GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode \
1263 || GET_MODE (XEXP (XEXP (X, 0), 0)) == QImode) \
1264 && (REG_P (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1265 || (GET_CODE (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1267 && REG_P (XEXP (XEXP (XEXP (XEXP (X, 0), 0), 0), \
1270 int something_reloaded = 0; \
1272 if (REGNO (XEXP (X, 1)) >= FIRST_PSEUDO_REGISTER) \
1274 /* Second reg is pseudo, reload it. */ \
1275 push_reload (XEXP (X, 1), NULL_RTX, &XEXP (X, 1), \
1277 GENERAL_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1279 something_reloaded = 1; \
1282 if (REG_P (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1283 && (REGNO (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1284 >= FIRST_PSEUDO_REGISTER)) \
1286 /* First one is a pseudo - reload that. */ \
1287 push_reload (XEXP (XEXP (XEXP (X, 0), 0), 0), NULL_RTX, \
1288 &XEXP (XEXP (XEXP (X, 0), 0), 0), NULL, \
1290 GET_MODE (X), VOIDmode, 0, 0, OPNUM, TYPE); \
1291 something_reloaded = 1; \
1294 if (! something_reloaded \
1295 || (GET_CODE (XEXP (XEXP (X, 0), 0)) == POST_INC \
1296 && (REGNO (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1297 >= FIRST_PSEUDO_REGISTER))) \
1298 /* Reload the sign_extend. Happens if neither reg is a \
1299 pseudo, or the first one was inside post_increment. */ \
1300 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1301 GENERAL_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1308 /* In CRIS, only the postincrement address mode depends thus,
1309 since the increment depends on the size of the operand. */
1310 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
1313 if (GET_CODE (ADDR) == POST_INC) \
1318 #define LEGITIMATE_CONSTANT_P(X) 1
1321 /* Node: Condition Code */
1323 #define NOTICE_UPDATE_CC(EXP, INSN) cris_notice_update_cc (EXP, INSN)
1325 /* FIXME: Maybe define CANONICALIZE_COMPARISON later, when playing with
1326 optimizations. It is needed; currently we do this with instruction
1327 patterns and NOTICE_UPDATE_CC. */
1332 /* FIXME: Need to define REGISTER_MOVE_COST when more register classes are
1335 /* This isn't strictly correct for v0..3 in buswidth-8bit mode, but
1337 #define MEMORY_MOVE_COST(M, CLASS, IN) \
1338 (((M) == QImode) ? 4 : ((M) == HImode) ? 4 : 6)
1340 /* Regardless of the presence of delay slots, the default value of 1 for
1341 BRANCH_COST is the best in the range (1, 2, 3), tested with gcc-2.7.2
1342 with testcases ipps and gcc, giving smallest and fastest code. */
1344 #define SLOW_BYTE_ACCESS 0
1346 /* This is the threshold *below* which inline move sequences of
1347 word-length sizes will be emitted. The "9" will translate to
1348 (9 - 1) * 4 = 32 bytes maximum moved, but using 16 instructions
1349 (8 instruction sequences) or less. */
1350 #define MOVE_RATIO 9
1353 /* Node: Sections */
1355 #define TEXT_SECTION_ASM_OP "\t.text"
1357 #define DATA_SECTION_ASM_OP "\t.data"
1359 #define FORCE_EH_FRAME_INFO_IN_DATA_SECTION (! TARGET_ELF)
1361 /* The jump table is immediately connected to the preceding insn. */
1362 #define JUMP_TABLES_IN_TEXT_SECTION 1
1364 /* We pull a little trick to register the _fini function with atexit,
1365 after (presumably) registering the eh frame info, since we don't handle
1366 _fini (a.k.a. ___fini_start) in crt0 or have a crti for "pure" ELF. If
1367 you change this, don't forget that you can't have library function
1368 references (e.g. to atexit) in crtend.o, since those won't be resolved
1369 to libraries; those are linked in *before* crtend.o. */
1371 # define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
1372 static void __attribute__((__used__)) \
1373 call_ ## FUNC (void) \
1377 if (__builtin_strcmp (#FUNC, "frame_dummy") == 0) \
1379 extern void __fini__start (void); \
1380 atexit (__fini__start); \
1382 asm (TEXT_SECTION_ASM_OP); \
1388 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? 0 : INVALID_REGNUM)
1390 #define LEGITIMATE_PIC_OPERAND_P(X) cris_legitimate_pic_operand (X)
1393 /* Node: File Framework */
1395 /* NO_APP *only at file start* means faster assembly.
1396 It also means comments are not allowed.
1397 In some cases comments will be output for debugging purposes.
1398 Make sure they are allowed then. */
1399 /* Override previous definitions (elfos.h). */
1400 #undef ASM_FILE_START
1401 #define ASM_FILE_START(STREAM) \
1404 if (TARGET_PDEBUG || flag_print_asm_name) \
1405 fprintf ((STREAM), "#APP\n"); \
1407 fprintf ((STREAM), "#NO_APP\n"); \
1409 output_file_directive ((STREAM), main_input_filename); \
1413 /* We don't want an .ident for gcc. To avoid that but still support
1414 #ident, we override ASM_OUTPUT_IDENT and, since the gcc .ident is its
1415 only use besides ASM_OUTPUT_IDENT, undef IDENT_ASM_OP from elfos.h. */
1417 #undef ASM_OUTPUT_IDENT
1418 #define ASM_OUTPUT_IDENT(FILE, NAME) \
1419 fprintf (FILE, "%s\"%s\"\n", "\t.ident\t", NAME);
1421 #define ASM_APP_ON "#APP\n"
1423 #define ASM_APP_OFF "#NO_APP\n"
1426 /* Node: Data Output */
1428 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) (C) == '@'
1430 /* Node: Uninitialized Data */
1432 /* Remember to round off odd values if we want data alignment,
1433 since we cannot do that with an .align directive.
1435 Using .comm causes the space not to be reserved in .bss, but by
1436 tricks with the symbol type. Not good if other tools than binutils
1437 are used on the object files. Since ".global ... .lcomm ..." works, we
1438 use that. Use .._ALIGNED_COMMON, since gcc whines when we only have
1439 ..._COMMON, and we prefer to whine ourselves; BIGGEST_ALIGNMENT is not
1440 the one to check. This done for a.out only. */
1441 /* FIXME: I suspect a bug in gcc with alignment. Do not warn until
1442 investigated; it mucks up the testsuite results. */
1443 #define CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, LOCAL) \
1446 int align_ = (ALIGN) / BITS_PER_UNIT; \
1447 if (TARGET_DATA_ALIGN && TARGET_ALIGN_BY_32 && align_ < 4) \
1449 else if (TARGET_DATA_ALIGN && align_ < 2) \
1451 /* FIXME: Do we need this? */ \
1452 else if (align_ < 1) \
1459 fprintf ((FILE), "%s", LOCAL_ASM_OP); \
1460 assemble_name ((FILE), (NAME)); \
1461 fprintf ((FILE), "\n"); \
1463 fprintf ((FILE), "%s", COMMON_ASM_OP); \
1464 assemble_name ((FILE), (NAME)); \
1465 fprintf ((FILE), ",%u,%u\n", (int)(SIZE), align_); \
1469 /* We can't tell a one-only or weak COMM from a "global \
1470 COMM" so just make all non-locals weak. */ \
1472 ASM_WEAKEN_LABEL (FILE, NAME); \
1473 fputs ("\t.lcomm ", (FILE)); \
1474 assemble_name ((FILE), (NAME)); \
1475 fprintf ((FILE), ",%u\n", \
1476 ((int)(SIZE) + (align_ - 1)) & ~(align_ - 1)); \
1481 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
1482 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 0)
1484 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
1485 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
1486 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 1)
1488 /* FIXME: define ASM_OUTPUT_SHARED_COMMON and emit an error when it is
1489 used with -melinux and a.out. */
1491 /* Node: Label Output */
1493 /* Globalizing directive for a label. */
1494 #define GLOBAL_ASM_OP "\t.global "
1496 #define SUPPORTS_WEAK 1
1498 /* Remove any previous definition (elfos.h). */
1499 #undef ASM_GENERATE_INTERNAL_LABEL
1500 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1501 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long) NUM)
1503 /* Node: Initialization */
1504 /* (no definitions) */
1506 /* Node: Macros for Initialization */
1507 /* (no definitions) */
1509 /* Node: Instruction Output */
1511 #define REGISTER_NAMES \
1512 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
1513 "r9", "r10", "r11", "r12", "r13", "sp", "pc", "srp", "faked_ap"}
1515 #define ADDITIONAL_REGISTER_NAMES \
1516 {{"r14", 14}, {"r15", 15}}
1518 #define PRINT_OPERAND(FILE, X, CODE) \
1519 cris_print_operand (FILE, X, CODE)
1521 /* For delay-slot handling. */
1522 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#')
1524 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
1525 cris_print_operand_address (FILE, ADDR)
1527 /* Output an empty line to illustrate the presence of the delay slot. */
1528 #define DBR_OUTPUT_SEQEND(FILE) \
1529 fprintf (FILE, "\n")
1531 #define LOCAL_LABEL_PREFIX (TARGET_ELF ? "." : "")
1533 /* cppinit.c initializes a const array from this, so it must be constant,
1534 can't have it different based on options. Luckily, the prefix is
1535 always allowed, so let's have it on all GCC-generated code. Note that
1536 we have this verbatim everywhere in the back-end, not using %R or %s or
1538 #define REGISTER_PREFIX "$"
1540 /* Remove any previous definition (elfos.h). */
1541 /* We use -fno-leading-underscore to remove it, when necessary. */
1542 #undef USER_LABEL_PREFIX
1543 #define USER_LABEL_PREFIX "_"
1545 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \
1546 fprintf (FILE, "\tpush $%s\n", reg_names[REGNO])
1548 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \
1549 fprintf (FILE, "\tpop $%s\n", reg_names[REGNO])
1552 /* Node: Dispatch Tables */
1554 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1555 asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL)
1557 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1558 asm_fprintf (FILE, "\t.dword %LL%d\n", VALUE)
1560 /* Defined to also emit an .align in elfos.h. We don't want that. */
1561 #undef ASM_OUTPUT_CASE_LABEL
1563 /* Since the "bound" insn loads the comparison value if the compared<
1564 value (register) is out of bounds (0..comparison value-1), we need
1565 to output another case to catch it.
1566 The way to find it is to look for the label_ref at the else-arm inside
1567 the expanded casesi core-insn.
1568 FIXME: Check this construct when changing to new version of gcc. */
1569 #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) \
1572 asm_fprintf (STREAM, "\t.word %LL%d-%LL%d%s\n", \
1576 (PATTERN (PREV_INSN (PREV_INSN \
1578 0, 0), 1), 2), 0)), \
1580 (TARGET_PDEBUG ? "; default" : "")); \
1585 /* Node: Exception Region Output */
1586 /* (no definitions) */
1587 /* FIXME: Fill in with our own optimized layout. */
1589 /* Node: Alignment Output */
1591 #define ASM_OUTPUT_ALIGN(FILE, LOG) \
1592 fprintf (FILE, "\t.align %d\n", (LOG))
1595 /* Node: All Debuggers */
1597 #define DBX_REGISTER_NUMBER(REGNO) \
1598 ((REGNO) == CRIS_SRP_REGNUM ? CRIS_CANONICAL_SRP_REGNUM : (REGNO))
1600 /* FIXME: Investigate DEBUGGER_AUTO_OFFSET, DEBUGGER_ARG_OFFSET. */
1603 /* Node: DBX Options */
1605 /* Is this correct? Check later. */
1606 #define DBX_NO_XREFS
1608 #define DBX_CONTIN_LENGTH 0
1610 /* FIXME: Is this needed when we have 0 DBX_CONTIN_LENGTH? */
1611 #define DBX_CONTIN_CHAR '?'
1614 /* Node: DBX Hooks */
1615 /* (no definitions) */
1617 /* Node: File names and DBX */
1618 /* (no definitions) */
1621 /* Node: SDB and DWARF */
1622 /* (no definitions) */
1626 /* FIXME: Check this one more time. */
1627 #define PREDICATE_CODES \
1628 {"cris_orthogonal_operator", \
1629 {PLUS, MINUS, IOR, AND, UMIN}}, \
1630 {"cris_commutative_orth_op", \
1631 {PLUS, IOR, AND, UMIN}}, \
1632 {"cris_operand_extend_operator", \
1633 {PLUS, MINUS, UMIN}}, \
1634 {"cris_additive_operand_extend_operator", \
1636 {"cris_extend_operator", \
1637 {ZERO_EXTEND, SIGN_EXTEND}}, \
1638 {"cris_plus_or_bound_operator", \
1640 {"cris_bdap_operand", \
1641 {SUBREG, REG, LABEL_REF, SYMBOL_REF, MEM, CONST_INT, \
1642 CONST_DOUBLE, CONST, SIGN_EXTEND}}, \
1643 {"cris_bdap_biap_operand", \
1644 {SUBREG, REG, LABEL_REF, SYMBOL_REF, MEM, CONST_INT, \
1645 CONST_DOUBLE, CONST, SIGN_EXTEND, MULT}}, \
1646 {"cris_general_operand_or_gotless_symbol", \
1647 {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \
1648 LABEL_REF, SUBREG, REG, MEM}}, \
1649 {"cris_general_operand_or_symbol", \
1650 {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \
1651 LABEL_REF, SUBREG, REG, MEM}}, \
1652 {"cris_general_operand_or_plt_symbol", \
1653 {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \
1654 LABEL_REF, SUBREG, REG, MEM}}, \
1655 {"cris_mem_call_operand", \
1658 /* A combination of the bound (umin) insn together with a
1659 sign-extended add via the table to PC seems optimal.
1660 If the table overflows, the assembler will take care of it.
1661 Theoretically, in extreme cases (uncertain if they occur), an error
1662 will be emitted, so FIXME: Check how large case-tables are emitted,
1663 possible add an option to emit SImode case-tables. */
1664 #define CASE_VECTOR_MODE HImode
1666 #define CASE_VECTOR_PC_RELATIVE 1
1668 /* FIXME: Investigate CASE_VECTOR_SHORTEN_MODE to make sure HImode is not
1669 used when broken-.word could possibly fail (plus test-case). */
1671 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1673 /* This is the number of bytes that can be moved in one
1674 reasonably fast instruction sequence. For CRIS, this is two
1675 instructions: mem => reg, reg => mem. */
1678 /* Maybe SHIFT_COUNT_TRUNCATED is safe to define? FIXME: Check later. */
1680 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1682 #define Pmode SImode
1684 #define FUNCTION_MODE QImode
1686 #define NO_IMPLICIT_EXTERN_C
1690 * eval: (c-set-style "gnu")
1691 * indent-tabs-mode: t