1 /* Definitions for GCC. Part of the machine description for CRIS.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 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 #define CRIS_FUNCTION_ARG_SIZE(MODE, TYPE) \
71 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \
72 : (unsigned) int_size_in_bytes (TYPE))
74 /* Check for max allowed stackframe. A "const char *" to be parsed. */
75 extern const char *cris_max_stackframe_str;
77 /* Which CPU version this is. A "const char *" to be parsed. */
78 extern const char *cris_cpu_str;
80 /* Which CPU version this is. The parsed and adjusted cris_cpu_str. */
81 extern int cris_cpu_version;
83 /* Which CPU version to tune for. A "const char *" to be parsed. */
84 extern const char *cris_tune_str;
86 /* The argument to "-melinux-stacksize=". We don't parse it currently;
87 it's just passed on to the linker. We might want to do something
89 extern const char *cris_elinux_stacksize_str;
91 /* Changing the order used to be necessary to put the fourth __make_dp
92 argument (a DImode parameter) in registers, to fit with the libfunc
93 parameter passing scheme used for intrinsic functions. FIXME: Check
94 performance and maybe remove definition from TARGET_LIBGCC2_CFLAGS now
95 that it isn't strictly necessary. We used to do this through
96 TARGET_LIBGCC2_CFLAGS, but that became increasingly difficult as the
97 parenthesis (that needed quoting) travels through several layers of
98 make and shell invocations. */
100 #define __make_dp(a,b,c,d) __cris_make_dp(d,a,b,c)
106 /* When using make with defaults.mak for Sun this will handily remove
107 any "-target sun*" switches. */
108 /* We need to override any previous definitions (linux.h) */
109 #undef WORD_SWITCH_TAKES_ARG
110 #define WORD_SWITCH_TAKES_ARG(STR) \
111 (DEFAULT_WORD_SWITCH_TAKES_ARG (STR) \
112 || !strcmp (STR, "target"))
114 /* Also provide canonical vN definitions when user specifies an alias.
115 Note that -melf overrides -maout. */
117 /* The `-$' is here mostly due to the integrated preprocessor not
118 handling the builtin expansion of "#define __REGISTER_PREFIX__ $"
119 gracefully. This is slightly redundant although not incorrect.
120 We're quite alone defining REGISTER_PREFIX as "$" so it's unlikely
121 someone will fight for us. This year in the mountains.
122 Note that for -melinux and -mlinux, command-line -isystem options are
123 emitted both before and after the synthesized one. We can't remove all
124 of them: a %{<isystem} will only remove the first one and %{<isystem*}
125 will not do TRT. Those extra occurrences are harmless anyway. */
127 "-$ -D__CRIS_ABI_version=2\
128 %{mtune=*:-D__tune_%* %{mtune=v*:-D__CRIS_arch_tune=%*}}\
129 %{mtune=etrax4:-D__tune_v3 -D__CRIS_arch_tune=3}\
130 %{mtune=etrax100:-D__tune_v8 -D__CRIS_arch_tune=8}\
131 %{mtune=svinto:-D__tune_v8 -D__CRIS_arch_tune=8}\
132 %{mtune=etrax100lx:-D__tune_v10 -D__CRIS_arch_tune=10}\
133 %{mtune=ng:-D__tune_v10 -D__CRIS_arch_tune=10}\
134 %{mcpu=*:-D__arch_%* %{mcpu=v*:-D__CRIS_arch_version=%*}}\
135 %{mcpu=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
136 %{mcpu=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
137 %{mcpu=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
138 %{mcpu=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
139 %{mcpu=ng:-D__arch_v10 -D__CRIS_arch_version=10}\
140 %{march=*:-D__arch_%* %{march=v*:-D__CRIS_arch_version=%*}}\
141 %{march=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
142 %{march=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
143 %{march=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
144 %{march=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
145 %{march=ng:-D__arch_v10 -D__CRIS_arch_version=10}\
146 %{metrax100:-D__arch__v8 -D__CRIS_arch_version=8}\
147 %{metrax4:-D__arch__v3 -D__CRIS_arch_version=3}\
150 /* For the cris-*-elf subtarget. */
151 #define CRIS_CPP_SUBTARGET_SPEC \
153 %{mbest-lib-options:\
154 %{!moverride-best-lib-options:\
155 %{!march=*:%{!metrax*:%{!mcpu=*:-D__tune_v10 -D__CRIS_arch_tune=10}}}}}"
157 /* Remove those Sun-make "target" switches. */
158 /* Override previous definitions (linux.h). */
162 %{metrax4:-march=v3}\
163 %{metrax100:-march=v8}\
166 /* For the cris-*-elf subtarget. */
167 #define CRIS_CC1_SUBTARGET_SPEC \
169 %{mbest-lib-options:\
170 %{!moverride-best-lib-options:\
171 %{!march=*:%{!mcpu=*:-mtune=v10 -D__CRIS_arch_tune=10}}\
172 %{!finhibit-size-directive:\
173 %{!fno-function-sections: -ffunction-sections}\
174 %{!fno-data-sections: -fdata-sections}}}}"
176 /* This adds to CC1_SPEC. When bugs are removed from -fvtable-gc
177 (-fforce-addr causes invalid .vtable_entry asm in tinfo.cc and
178 nothing at all works in GCC 3.0-pre), add this line:
179 "%{mbest-lib-options:%{!moverride-best-lib-options:\
180 %{!melinux:%{!maout|melf:%{!fno-vtable-gc:-fvtable-gc}}}}}". */
181 #define CC1PLUS_SPEC ""
183 /* Override previous definitions (linux.h). */
189 /* For the cris-*-elf subtarget. */
190 #define CRIS_ASM_SUBTARGET_SPEC "--em=criself"
192 /* FIXME: We should propagate the -melf option to make the criself
193 "emulation" unless a linker script is provided (-T*), but I don't know
194 how to do that if either of -Ttext, -Tdata or -Tbss is given but no
195 linker script, as is usually the case. Leave it to the user for the
198 Note that -melf overrides -maout except that a.out-compiled libraries
199 are linked in (multilibbing). The somewhat cryptic -rpath-link pair is
200 to avoid *only* picking up the linux multilib subdir from the "-B./"
201 option during build, while still giving it preference. We'd need some
202 %s-variant that checked for existence of some specific file. */
203 /* Override previous definitions (svr4.h). */
209 /* For the cris-*-elf subtarget. */
210 #define CRIS_LINK_SUBTARGET_SPEC \
212 %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\
213 %{O2|O3: --gc-sections}"
215 /* Which library to get. The only difference from the default is to get
216 libsc.a if -sim is given to the driver. Repeat -lc -lsysX
217 {X=sim,linux}, because libsysX needs (at least) errno from libc, and
218 then we want to resolve new unknowns in libc against libsysX, not
220 /* Override previous definitions (linux.h). */
223 "%{sim*:-lc -lsyssim -lc -lsyssim}\
225 %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\
228 /* Linker startfile options; crt0 flavors.
230 At the moment there are no gcrt0.o or mcrt0.o, but keep them here and
231 link them to crt0.o to be prepared. Use scrt0.c if running the
232 simulator, linear style, or s2crt0.c if fixed style. */
233 /* We need to remove any previous definition (elfos.h). */
234 #define STARTFILE_SPEC \
236 %{!sim2:%{sim:scrt0.o%s}\
237 %{!sim:%{pg:gcrt0.o%s}\
238 %{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
241 #define ENDFILE_SPEC "crtend.o%s"
243 #define EXTRA_SPECS \
244 {"cpp_subtarget", CRIS_CPP_SUBTARGET_SPEC}, \
245 {"cc1_subtarget", CRIS_CC1_SUBTARGET_SPEC}, \
246 {"asm_subtarget", CRIS_ASM_SUBTARGET_SPEC}, \
247 {"link_subtarget", CRIS_LINK_SUBTARGET_SPEC}, \
248 CRIS_SUBTARGET_EXTRA_SPECS
250 #define CRIS_SUBTARGET_EXTRA_SPECS
253 /* Node: Run-time Target */
255 /* Only keep the non-varying ones here. */
256 #define CPP_PREDEFINES "-Dcris -DCRIS -DGNU_CRIS"
258 /* This needs to be at least 32 bits. */
259 extern int target_flags;
261 /* Currently this just affects aligment. FIXME: Redundant with
262 TARGET_ALIGN_BY_32, or put machine stuff here? */
263 #define TARGET_MASK_SVINTO 1
264 #define TARGET_SVINTO (target_flags & TARGET_MASK_SVINTO)
266 /* If to use condition-codes generated by insns other than the
267 immediately preceding compare/test insn.
268 Used to check for errors in notice_update_cc. */
269 #define TARGET_MASK_CCINIT 2
270 #define TARGET_CCINIT (target_flags & TARGET_MASK_CCINIT)
273 #define TARGET_MASK_PDEBUG 4
274 #define TARGET_PDEBUG (target_flags & TARGET_MASK_PDEBUG)
276 /* If to use side-effect patterns. Used to debug the [rx=ry+i] type
278 #define TARGET_MASK_SIDE_EFFECT_PREFIXES 8
279 #define TARGET_SIDE_EFFECT_PREFIXES \
280 (target_flags & TARGET_MASK_SIDE_EFFECT_PREFIXES)
282 /* If to expand mul into mstep. Only used when making libc.a. */
283 #define TARGET_MASK_EXPAND_MUL 16
284 #define TARGET_EXPAND_MUL (target_flags & TARGET_MASK_EXPAND_MUL)
286 /* If to *keep* (not force) alignment of stack at 16 bits. */
287 #define TARGET_MASK_STACK_ALIGN 32
288 #define TARGET_STACK_ALIGN (target_flags & TARGET_MASK_STACK_ALIGN)
290 /* If to do alignment on individual non-modifiable objects. */
291 #define TARGET_MASK_CONST_ALIGN 64
292 #define TARGET_CONST_ALIGN (target_flags & TARGET_MASK_CONST_ALIGN)
294 /* If to do alignment on individual modifiable objects. */
295 #define TARGET_MASK_DATA_ALIGN 128
296 #define TARGET_DATA_ALIGN (target_flags & TARGET_MASK_DATA_ALIGN)
298 /* If not to omit function prologue and epilogue. */
299 #define TARGET_MASK_PROLOGUE_EPILOGUE 256
300 #define TARGET_PROLOGUE_EPILOGUE (target_flags & TARGET_MASK_PROLOGUE_EPILOGUE)
302 /* Instructions additions from Etrax 4 and up.
303 (Just "lz", which we don't really generate from GCC -- yet). */
304 #define TARGET_MASK_ETRAX4_ADD 512
305 #define TARGET_ETRAX4_ADD (target_flags & TARGET_MASK_ETRAX4_ADD)
307 /* Say that all alignment specifications say to prefer 32 rather
309 #define TARGET_MASK_ALIGN_BY_32 1024
310 #define TARGET_ALIGN_BY_32 (target_flags & TARGET_MASK_ALIGN_BY_32)
312 /* This condition is of limited use, as gcc is riddled with #ifdef:s
313 controlling this, rather than if (...):s. */
314 #define TARGET_MASK_ELF 2048
315 #define TARGET_ELF (target_flags & TARGET_MASK_ELF)
317 /* Currently just used to error-check other options. Note that this is
318 *not* set for -melinux. */
319 #define TARGET_MASK_LINUX 4096
320 #define TARGET_LINUX (target_flags & TARGET_MASK_LINUX)
322 /* There's a small setup cost with using GOTPLT references, but should
323 in total be a win both in code-size and execution-time. */
324 #define TARGET_MASK_AVOID_GOTPLT 8192
325 #define TARGET_AVOID_GOTPLT (target_flags & TARGET_MASK_AVOID_GOTPLT)
327 #define TARGET_SWITCHES \
329 /* No "no-etrax" as it does not really imply any model. \
330 On the other hand, "etrax" implies the common (and large) \
331 subset matching all models. */ \
332 {"etrax4", TARGET_MASK_ETRAX4_ADD, \
333 N_("Compile for ETRAX 4 (CRIS v3)")}, \
334 {"no-etrax4", -TARGET_MASK_ETRAX4_ADD, ""}, \
335 {"etrax100", (TARGET_MASK_SVINTO \
336 + TARGET_MASK_ETRAX4_ADD \
337 + TARGET_MASK_ALIGN_BY_32), \
338 N_("Compile for ETRAX 100 (CRIS v8)")}, \
339 {"no-etrax100", -(TARGET_MASK_SVINTO \
340 + TARGET_MASK_ETRAX4_ADD), ""}, \
341 {"pdebug", TARGET_MASK_PDEBUG, \
342 N_("Emit verbose debug information in assembly code")}, \
343 {"no-pdebug", -TARGET_MASK_PDEBUG, ""}, \
344 {"cc-init", TARGET_MASK_CCINIT, \
345 N_("Do not use condition codes from normal instructions")}, \
346 {"no-cc-init", -TARGET_MASK_CCINIT, ""}, \
347 {"side-effects", TARGET_MASK_SIDE_EFFECT_PREFIXES, ""}, \
348 {"no-side-effects", -TARGET_MASK_SIDE_EFFECT_PREFIXES, \
349 N_("Do not emit addressing modes with side-effect assignment")}, \
350 {"stack-align", TARGET_MASK_STACK_ALIGN, ""}, \
351 {"no-stack-align", -TARGET_MASK_STACK_ALIGN, \
352 N_("Do not tune stack alignment")}, \
353 {"data-align", TARGET_MASK_DATA_ALIGN, ""}, \
354 {"no-data-align", -TARGET_MASK_DATA_ALIGN, \
355 N_("Do not tune writable data alignment")}, \
356 {"const-align", TARGET_MASK_CONST_ALIGN, ""}, \
357 {"no-const-align", -TARGET_MASK_CONST_ALIGN, \
358 N_("Do not tune code and read-only data alignment")}, \
359 {"32-bit", (TARGET_MASK_STACK_ALIGN \
360 + TARGET_MASK_CONST_ALIGN \
361 + TARGET_MASK_DATA_ALIGN \
362 + TARGET_MASK_ALIGN_BY_32), ""}, \
363 {"32bit", (TARGET_MASK_STACK_ALIGN \
364 + TARGET_MASK_CONST_ALIGN \
365 + TARGET_MASK_DATA_ALIGN \
366 + TARGET_MASK_ALIGN_BY_32), \
367 N_("Align code and data to 32 bits")}, \
368 {"16-bit", (TARGET_MASK_STACK_ALIGN \
369 + TARGET_MASK_CONST_ALIGN \
370 + TARGET_MASK_DATA_ALIGN), ""}, \
371 {"16bit", (TARGET_MASK_STACK_ALIGN \
372 + TARGET_MASK_CONST_ALIGN \
373 + TARGET_MASK_DATA_ALIGN), ""}, \
374 {"8-bit", -(TARGET_MASK_STACK_ALIGN \
375 + TARGET_MASK_CONST_ALIGN \
376 + TARGET_MASK_DATA_ALIGN), ""}, \
377 {"8bit", -(TARGET_MASK_STACK_ALIGN \
378 + TARGET_MASK_CONST_ALIGN \
379 + TARGET_MASK_DATA_ALIGN), \
380 N_("Don't align items in code or data")}, \
381 {"prologue-epilogue", TARGET_MASK_PROLOGUE_EPILOGUE, ""}, \
382 {"no-prologue-epilogue", -TARGET_MASK_PROLOGUE_EPILOGUE, \
383 N_("Do not emit function prologue or epilogue")}, \
384 /* We have to handle this m-option here since we can't wash it off in \
385 both CC1_SPEC and CC1PLUS_SPEC. */ \
386 {"best-lib-options", 0, \
387 N_("Use the most feature-enabling options allowed by other options")}, \
389 /* We must call it "override-" since calling it "no-" will cause \
390 gcc.c to forget it, if there's a "later" -mbest-lib-options. \
391 Kludgy, but needed for some multilibbed files. */ \
392 {"override-best-lib-options", 0, \
393 N_("Override -mbest-lib-options")}, \
394 CRIS_SUBTARGET_SWITCHES \
395 {"", TARGET_DEFAULT | CRIS_SUBTARGET_DEFAULT, ""}} \
397 /* For the cris-*-elf subtarget. */
398 #define CRIS_SUBTARGET_SWITCHES \
401 /* Default target_flags if no switches specified. */
402 #ifndef TARGET_DEFAULT
403 # define TARGET_DEFAULT \
404 (TARGET_MASK_SIDE_EFFECT_PREFIXES + TARGET_MASK_STACK_ALIGN \
405 + TARGET_MASK_CONST_ALIGN + TARGET_MASK_DATA_ALIGN \
406 + TARGET_MASK_PROLOGUE_EPILOGUE)
409 /* For the cris-*-elf subtarget. */
410 #define CRIS_SUBTARGET_DEFAULT TARGET_MASK_ELF
412 #define CRIS_CPU_BASE 0
413 #define CRIS_CPU_ETRAX4 3 /* Just lz added. */
414 #define CRIS_CPU_SVINTO 8 /* Added swap, jsrc & Co., 32-bit accesses. */
415 #define CRIS_CPU_NG 10 /* Added mul[su]. */
417 /* Local, providing a default for cris_cpu_version. */
418 #define CRIS_DEFAULT_CPU_VERSION CRIS_CPU_BASE
420 #define TARGET_HAS_MUL_INSNS (cris_cpu_version >= CRIS_CPU_NG)
422 #define TARGET_OPTIONS \
423 {{"cpu=", &cris_cpu_str, ""}, \
424 {"arch=", &cris_cpu_str, \
425 N_("Generate code for the specified chip or CPU version")}, \
426 {"tune=", &cris_tune_str, \
427 N_("Tune alignment for the specified chip or CPU version")}, \
428 {"max-stackframe=", &cris_max_stackframe_str, \
429 N_("Warn when a stackframe is larger than the specified size")}, \
430 CRIS_SUBTARGET_LONG_OPTIONS \
431 {"ax-stackframe=", &cris_max_stackframe_str, ""}}
433 #define CRIS_SUBTARGET_LONG_OPTIONS
435 /* Print subsidiary information on the compiler version in use.
436 Do not use VD.D syntax (D=digit), since this will cause confusion
437 with the base gcc version among users, when we ask which version of
438 gcc-cris they are using. Please use some flavor of "R<number>" for
439 the version (no need for major.minor versions, I believe). */
440 #define TARGET_VERSION \
441 fprintf (stderr, " [Axis CRIS release R36a%s]", CRIS_SUBTARGET_VERSION)
443 /* For the cris-*-elf subtarget. */
444 #define CRIS_SUBTARGET_VERSION " - generic ELF"
446 #define OVERRIDE_OPTIONS cris_override_options ()
448 /* The following gives optimal code for gcc-2.7.2, but *may* be subject
449 to change. Omitting flag_force_addr gives .1-.7% faster code for gcc
450 *only*, but 1.3% larger code. On ipps it gives 5.3-10.6% slower
451 code(!) and 0.3% larger code. For products, images gets .1-1.8%
452 larger. Do not set strict aliasing from optimization options. */
453 #define OPTIMIZATION_OPTIONS(OPTIMIZE, SIZE) \
456 if ((OPTIMIZE) >= 2 || (SIZE)) \
458 flag_force_addr = 1; \
459 flag_omit_frame_pointer = 1; \
465 /* Node: Storage Layout */
467 #define BITS_BIG_ENDIAN 0
469 #define BYTES_BIG_ENDIAN 0
471 /* WORDS_BIG_ENDIAN is not defined in the hardware, but for consistency,
472 we use little-endianness, and we may also be able to use
473 post-increment on DImode indirect. */
474 #define WORDS_BIG_ENDIAN 0
476 #define BITS_PER_UNIT 8
478 #define BITS_PER_WORD 32
480 #define UNITS_PER_WORD 4
482 #define POINTER_SIZE 32
484 /* A combination of defining PROMOTE_MODE, PROMOTE_FUNCTION_ARGS,
485 PROMOTE_FOR_CALL_ONLY and *not* defining PROMOTE_PROTOTYPES gives the
486 best code size and speed for gcc, ipps and products in gcc-2.7.2. */
487 #define CRIS_PROMOTED_MODE(MODE, UNSIGNEDP, TYPE) \
488 (GET_MODE_CLASS (MODE) == MODE_INT && GET_MODE_SIZE (MODE) < 4) \
491 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
492 (MODE) = CRIS_PROMOTED_MODE (MODE, UNSIGNEDP, TYPE)
494 #define PROMOTE_FUNCTION_ARGS
496 /* Defining PROMOTE_FUNCTION_RETURN in gcc-2.7.2 uncovers bug 981110 (even
497 if defining FUNCTION_VALUE with MODE as PROMOTED_MODE ;-)
499 FIXME: Report this when cris.h is part of GCC, so others can easily
500 see the problem. Maybe check other systems that define
501 PROMOTE_FUNCTION_RETURN. */
502 #define PROMOTE_FOR_CALL_ONLY
504 /* We will be using prototype promotion, so they will be 32 bit. */
505 #define PARM_BOUNDARY 32
507 /* Stack boundary is guided by -mstack-align, -mno-stack-align,
509 Old comment: (2.1: still valid in 2.7.2?)
510 Note that to make this macro affect the alignment of stack
511 locals, a fix was required, and special precautions when handling
512 the stack pointer in various other macros (TARGET_ASM_FUNCTION_PROLOGUE
513 et al) were required. See file "function.c". If you would just define
514 this macro, it would only affect the builtin alloca and variable
515 local data (non-ANSI, non-K&R, Gnu C extension). */
516 #define STACK_BOUNDARY \
517 (TARGET_STACK_ALIGN ? (TARGET_ALIGN_BY_32 ? 32 : 16) : 8)
519 #define FUNCTION_BOUNDARY 16
521 /* Do not change BIGGEST_ALIGNMENT (when optimizing), as it will affect
522 strange places, at least in 2.1. */
523 #define BIGGEST_ALIGNMENT 8
525 /* If -m16bit, -m16-bit, -malign or -mdata-align,
526 align everything to 16 bit. */
527 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
529 ? (TARGET_ALIGN_BY_32 \
530 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \
531 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
533 /* Note that CONSTANT_ALIGNMENT has the effect of making gcc believe that
534 ALL references to constant stuff (in code segment, like strings) has
535 this alignment. That is a rather rushed assumption. Luckily we do not
536 care about the "alignment" operand to builtin memcpy (only place where
537 it counts), so it doesn't affect any bad spots. */
538 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
539 (TARGET_CONST_ALIGN \
540 ? (TARGET_ALIGN_BY_32 \
541 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \
542 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
544 /* FIXME: Define LOCAL_ALIGNMENT for word and dword or arrays and
545 structures (if -mstack-align=), and check that it is good. */
547 #define EMPTY_FIELD_BOUNDARY 8
549 #define STRUCTURE_SIZE_BOUNDARY 8
551 #define STRICT_ALIGNMENT 0
553 /* Remove any previous definition (elfos.h).
554 ??? If it wasn't for all the other stuff that affects layout of
555 structures and bit-fields, this could presumably cause incompatibility
556 with other GNU/Linux ports (i.e. elfos.h users). */
557 #undef PCC_BITFIELD_TYPE_MATTERS
559 /* This is only used for non-scalars. Strange stuff happens to structs
560 (FIXME: What?) if we use anything larger than largest actually used
561 datum size, so lets make it 32. The type "long long" will still work
562 as usual. We can still have DImode insns, but they will only be used
563 for scalar data (i.e. long long). */
564 #define MAX_FIXED_MODE_SIZE 32
567 /* Node: Type Layout */
569 /* Note that DOUBLE_TYPE_SIZE is not defined anymore, since the default
570 value gives a 64-bit double, which is what we now use. */
572 /* For compatibility and historical reasons, a char should be signed. */
573 #define DEFAULT_SIGNED_CHAR 1
575 /* No DEFAULT_SHORT_ENUMS, please. */
577 /* Note that WCHAR_TYPE_SIZE is used in cexp.y,
578 where TARGET_SHORT is not available. */
580 #define WCHAR_TYPE "long int"
582 #undef WCHAR_TYPE_SIZE
583 #define WCHAR_TYPE_SIZE 32
586 /* Node: Register Basics */
588 /* We count all 16 non-special registers, SRP and a faked argument
590 #define FIRST_PSEUDO_REGISTER (16 + 1 + 1)
592 /* For CRIS, these are r15 (pc) and r14 (sp). Register r8 is used as a
593 frame-pointer, but is not fixed. SRP is not included in general
594 registers and will not be used automatically. All other special
595 registers are fixed at the moment. The faked argument pointer register
597 #define FIXED_REGISTERS \
598 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1}
600 /* Register r9 is used for structure-address, r10-r13 for parameters,
601 r10- for return values. */
602 #define CALL_USED_REGISTERS \
603 {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1}
605 #define CONDITIONAL_REGISTER_USAGE cris_conditional_register_usage ()
608 /* Node: Allocation Order */
610 /* We need this on CRIS, because call-used regs should be used first,
611 (so we don't need to push). Else start using registers from r0 and up.
612 This preference is mainly because if we put call-used-regs from r0
613 and up, then we can't use movem to push the rest, (which have to be
614 saved if we use them, and movem has to start with r0).
615 Change here if you change which registers to use as call registers.
617 The actual need to explicitly prefer call-used registers improved the
618 situation a lot for 2.1, but might not actually be needed anymore.
619 Still, this order reflects what GCC should find out by itself, so it
620 probably does not hurt.
622 Order of preference: Call-used-regs first, then r0 and up, last fp &
624 Call-used regs in opposite order, so they will cause less conflict if
625 a function has few args (<= 3) and it wants a scratch reg.
626 Use struct-return address first, since very few functions use
627 structure return values so it is likely to be available. */
628 #define REG_ALLOC_ORDER \
629 {9, 13, 12, 11, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15, 16, 17}
632 /* Node: Values in Registers */
634 /* The VOIDmode test is so we can omit mode on anonymous insns. FIXME:
635 Still needed in 2.9x, at least for Axis-20000319. */
636 #define HARD_REGNO_NREGS(REGNO, MODE) \
638 ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
640 /* CRIS permits all registers to hold all modes. */
641 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
643 #define MODES_TIEABLE_P(MODE1, MODE2) 1
646 /* Node: Leaf Functions */
647 /* (no definitions) */
649 /* Node: Stack Registers */
650 /* (no definitions) */
653 /* Node: Register Classes */
655 /* CRIS has only one kind of registers, so NO_REGS and ALL_REGS
656 are the only classes. FIXME: It actually makes sense to have another
657 class for special registers, and yet another class for the
658 multiply-overflow register in v10; then a class for the return
659 register also makes sense. */
660 enum reg_class {NO_REGS, ALL_REGS, LIM_REG_CLASSES};
662 #define N_REG_CLASSES (int) LIM_REG_CLASSES
664 #define REG_CLASS_NAMES {"NO_REGS", "ALL_REGS"}
666 #define GENERAL_REGS ALL_REGS
668 /* Count in the faked argument register in GENERAL_REGS. Keep out SRP. */
669 #define REG_CLASS_CONTENTS {{0}, {0x2ffff}}
671 #define REGNO_REG_CLASS(REGNO) GENERAL_REGS
673 #define BASE_REG_CLASS GENERAL_REGS
675 #define INDEX_REG_CLASS GENERAL_REGS
677 /* Get reg_class from a letter such as appears in the machine
678 description. No letters are used, since 'r' is used for any
680 #define REG_CLASS_FROM_LETTER(C) NO_REGS
682 /* Since it uses reg_renumber, it is safe only once reg_renumber
683 has been allocated, which happens in local-alloc.c. */
684 #define REGNO_OK_FOR_BASE_P(REGNO) \
685 ((REGNO) <= CRIS_LAST_GENERAL_REGISTER \
686 || (REGNO) == ARG_POINTER_REGNUM \
687 || (unsigned) reg_renumber[REGNO] <= CRIS_LAST_GENERAL_REGISTER \
688 || (unsigned) reg_renumber[REGNO] == ARG_POINTER_REGNUM)
690 /* See REGNO_OK_FOR_BASE_P. */
691 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO)
693 /* It seems like gcc (2.7.2 and 2.9x of 2000-03-22) may send "NO_REGS" as
694 the class for a constant (testcase: __Mul in arit.c). To avoid forcing
695 out a constant into the constant pool, we will trap this case and
696 return something a bit more sane. FIXME: Check if this is a bug. */
697 #define PREFERRED_RELOAD_CLASS(X, CLASS) \
698 ((CLASS) == NO_REGS ? GENERAL_REGS : (CLASS))
700 /* For CRIS, this is always the size of MODE in words,
701 since all registers are the same size. To use omitted modes in
702 patterns with reload constraints, you must say the widest size
703 which is allowed for VOIDmode.
704 FIXME: Does that still apply for gcc-2.9x? Keep poisoned until such
705 patterns are added back. News: 2001-03-16: Happens as early as the
707 #define CLASS_MAX_NREGS(CLASS, MODE) \
708 ((MODE) == VOIDmode \
709 ? 1 /* + cris_fatal ("CLASS_MAX_NREGS with VOIDmode") */ \
710 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
712 /* We are now out of letters; we could use ten more. This forces us to
713 use C-code in the 'md' file. FIXME: Use some EXTRA_CONSTRAINTS. */
714 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
716 /* MOVEQ, CMPQ, ANDQ, ORQ. */ \
717 (C) == 'I' ? (VALUE) >= -32 && (VALUE) <= 31 : \
719 (C) == 'J' ? (VALUE) >= 0 && (VALUE) <= 63 : \
720 /* ASRQ, BTSTQ, LSRQ, LSLQ. */ \
721 (C) == 'K' ? (VALUE) >= 0 && (VALUE) <= 31 : \
722 /* A 16-bit signed number. */ \
723 (C) == 'L' ? (VALUE) >= -32768 && (VALUE) <= 32767 : \
724 /* The constant 0 for CLEAR. */ \
725 (C) == 'M' ? (VALUE) == 0 : \
726 /* A negative ADDQ or SUBQ. */ \
727 (C) == 'N' ? (VALUE) >= -63 && (VALUE) < 0 : \
728 /* Quickened ints, QI and HI. */ \
729 (C) == 'O' ? (VALUE) >= 0 && (VALUE) <= 65535 \
730 && ((VALUE) >= (65535-31) \
731 || ((VALUE) >= (255-31) \
732 && (VALUE) <= 255 )) : \
733 /* A 16-bit number signed *or* unsigned. */ \
734 (C) == 'P' ? (VALUE) >= -32768 && (VALUE) <= 65535 : \
737 /* It is really simple to make up a 0.0; it is the same as int-0 in
739 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
740 ((C) == 'G' && ((VALUE) == CONST0_RTX (DFmode) \
741 || (VALUE) == CONST0_RTX (SFmode)))
743 /* We need this on cris to distinguish delay-slottable addressing modes. */
744 #define EXTRA_CONSTRAINT(X, C) \
746 /* Slottable address mode? */ \
747 (C) == 'Q' ? EXTRA_CONSTRAINT_Q (X) : \
748 /* Operand to BDAP or BIAP? */ \
749 (C) == 'R' ? EXTRA_CONSTRAINT_R (X) : \
750 /* A local PIC symbol? */ \
751 (C) == 'S' ? EXTRA_CONSTRAINT_S (X) : \
752 /* A three-address addressing-mode? */ \
753 (C) == 'T' ? EXTRA_CONSTRAINT_T (X) : \
754 /* A global PIC symbol? */ \
755 (C) == 'U' ? EXTRA_CONSTRAINT_U (X) : \
758 #define EXTRA_CONSTRAINT_Q(X) \
760 /* Slottable addressing modes: \
761 A register? FIXME: Unnecessary. */ \
762 (BASE_P (X) && REGNO (X) != CRIS_PC_REGNUM) \
763 /* Indirect register: [reg]? */ \
764 || (GET_CODE (X) == MEM && BASE_P (XEXP (X, 0)) \
765 && REGNO (XEXP (X, 0)) != CRIS_PC_REGNUM) \
768 #define EXTRA_CONSTRAINT_R(X) \
770 /* An operand to BDAP or BIAP: \
773 /* A [reg] or (int) [reg], maybe with post-increment. */ \
774 || BDAP_INDEX_P (X) \
775 || CONSTANT_INDEX_P (X) \
778 #define EXTRA_CONSTRAINT_T(X) \
780 /* Memory three-address operand. All are indirect-memory: */ \
781 GET_CODE (X) == MEM \
782 && ((GET_CODE (XEXP (X, 0)) == MEM \
783 /* Double indirect: [[reg]] or [[reg+]]? */ \
784 && (BASE_OR_AUTOINCR_P (XEXP (XEXP (X, 0), 0)))) \
785 /* Just an explicit indirect reference: [const]? */ \
786 || CONSTANT_P (XEXP (X, 0)) \
787 /* Something that is indexed; [...+...]? */ \
788 || (GET_CODE (XEXP (X, 0)) == PLUS \
789 /* A BDAP constant: [reg+(8|16|32)bit offset]? */ \
790 && ((BASE_P (XEXP (XEXP (X, 0), 0)) \
791 && CONSTANT_INDEX_P (XEXP (XEXP (X, 0), 1))) \
792 /* Swap arguments to the above. FIXME: gcc-2.9x? */ \
793 || (BASE_P (XEXP (XEXP (X, 0), 1)) \
794 && CONSTANT_INDEX_P (XEXP (XEXP (X, 0), 0))) \
795 /* A BDAP register: [reg+[reg(+)].S]? */ \
796 || (BASE_P (XEXP (XEXP (X, 0), 0)) \
797 && BDAP_INDEX_P(XEXP(XEXP(X, 0), 1))) \
798 /* Same, but with swapped arguments. */ \
799 || (BASE_P (XEXP (XEXP (X, 0), 1)) \
800 && BDAP_INDEX_P (XEXP (XEXP (X, 0), 0))) \
801 /* A BIAP: [reg+reg.S]. */ \
802 || (BASE_P (XEXP (XEXP (X, 0), 0)) \
803 && BIAP_INDEX_P (XEXP (XEXP (X, 0), 1))) \
804 /* Same, but with swapped arguments. */ \
805 || (BASE_P (XEXP (XEXP (X, 0), 1)) \
806 && BIAP_INDEX_P (XEXP (XEXP (X, 0), 0)))))) \
809 #define EXTRA_CONSTRAINT_S(X) \
810 (flag_pic && CONSTANT_P (X) && cris_gotless_symbol (X))
812 #define EXTRA_CONSTRAINT_U(X) \
813 (flag_pic && CONSTANT_P (X) && cris_got_symbol (X))
816 /* Node: Frame Layout */
818 #define STACK_GROWS_DOWNWARD
819 #define FRAME_GROWS_DOWNWARD
821 /* It seems to be indicated in the code (at least 2.1) that this is
822 better a constant, and best 0. */
823 #define STARTING_FRAME_OFFSET 0
825 #define FIRST_PARM_OFFSET(FNDECL) 0
827 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
828 cris_return_addr_rtx (COUNT, FRAMEADDR)
830 #define INCOMING_RETURN_ADDR_RTX gen_rtx (REG, Pmode, CRIS_SRP_REGNUM)
832 /* FIXME: Any __builtin_eh_return callers must not return anything and
833 there must not be collisions with incoming parameters. Luckily the
834 number of __builtin_eh_return callers is limited. For now return
835 parameter registers in reverse order and hope for the best. */
836 #define EH_RETURN_DATA_REGNO(N) \
837 (IN_RANGE ((N), 0, 3) ? (CRIS_FIRST_ARG_REG + 3 - (N)) : INVALID_REGNUM)
839 /* Store the stack adjustment in the structure-return-address register. */
840 #define CRIS_STACKADJ_REG STRUCT_VALUE_REGNUM
841 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, CRIS_STACKADJ_REG)
843 #define EH_RETURN_HANDLER_RTX \
844 cris_return_addr_rtx (0, NULL)
846 #define INIT_EXPANDERS cris_init_expanders ()
848 /* FIXME: Move this to right node (it's not documented properly yet). */
849 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (CRIS_SRP_REGNUM)
851 /* FIXME: Move this to right node (it's not documented properly yet).
852 FIXME: Check what alignment we can assume regarding
853 TARGET_STACK_ALIGN and TARGET_ALIGN_BY_32. */
854 #define DWARF_CIE_DATA_ALIGNMENT -1
856 /* If we would ever need an exact mapping between canonical register
857 number and dwarf frame register, we would either need to include all
858 registers in the gcc decription (with some marked fixed of course), or
859 an inverse mapping from dwarf register to gcc register. There is one
860 need in dwarf2out.c:expand_builtin_init_dwarf_reg_sizes. Right now, I
861 don't see that we need exact correspondence between DWARF *frame*
862 registers and DBX_REGISTER_NUMBER, so map them onto GCC registers. */
863 #define DWARF_FRAME_REGNUM(REG) (REG)
865 /* Node: Stack Checking */
866 /* (no definitions) FIXME: Check. */
868 /* Node: Frame Registers */
870 #define STACK_POINTER_REGNUM 14
872 /* Register used for frame pointer. This is also the last of the saved
873 registers, when a frame pointer is not used. */
874 #define FRAME_POINTER_REGNUM 8
876 /* Faked register, is always eliminated. We need it to eliminate
877 allocating stack slots for the return address and the frame pointer. */
878 #define ARG_POINTER_REGNUM 17
880 #define STATIC_CHAIN_REGNUM 7
883 /* Node: Elimination */
885 /* Really only needed if the stack frame has variable length (alloca
886 or variable sized local arguments (GNU C extension). */
887 #define FRAME_POINTER_REQUIRED 0
889 #define ELIMINABLE_REGS \
890 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
891 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
892 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
894 /* We need not worry about when the frame-pointer is required for other
896 #define CAN_ELIMINATE(FROM, TO) 1
898 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
899 (OFFSET) = cris_initial_elimination_offset (FROM, TO)
902 /* Node: Stack Arguments */
904 /* Since many parameters take up one register each in any case,
905 PROMOTE_PROTOTYPES would seem like a good idea, but measurements
906 indicate that a combination using PROMOTE_MODE is better. */
908 #define ACCUMULATE_OUTGOING_ARGS 1
910 #define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0
913 /* Node: Register Arguments */
915 /* The void_type_node is sent as a "closing" call. We have to stop it
916 since it's invalid to FUNCTION_ARG_PASS_BY_REFERENCE (or was invalid at
918 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
919 ((CUM).regs < CRIS_MAX_ARGS_IN_REGS \
920 && (TYPE) != void_type_node \
921 && ! FUNCTION_ARG_PASS_BY_REFERENCE (CUM, MODE, TYPE, NAMED) \
922 ? gen_rtx (REG, MODE, (CRIS_FIRST_ARG_REG) + (CUM).regs) \
925 /* The differences between this and the previous, is that this one checks
926 that an argument is named, since incoming stdarg/varargs arguments are
927 pushed onto the stack, and we don't have to check against the "closing"
928 void_type_node TYPE parameter. */
929 #define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \
930 (((NAMED) && (CUM).regs < CRIS_MAX_ARGS_IN_REGS \
931 && ! FUNCTION_ARG_PASS_BY_REFERENCE (CUM, MODE, TYPE, NAMED)) \
932 ? gen_rtx (REG, MODE, CRIS_FIRST_ARG_REG + (CUM).regs) \
935 #define FUNCTION_ARG_PARTIAL_NREGS(CUM, MODE, TYPE, NAMED) \
936 (((CUM).regs == (CRIS_MAX_ARGS_IN_REGS - 1) \
937 && !MUST_PASS_IN_STACK (MODE, TYPE) \
938 && CRIS_FUNCTION_ARG_SIZE (MODE, TYPE) > 4 \
939 && CRIS_FUNCTION_ARG_SIZE (MODE, TYPE) <= 8) \
942 /* Structs may be passed by value, but they must not be more than 8
944 #define FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
945 (MUST_PASS_IN_STACK (MODE, TYPE) \
946 || CRIS_FUNCTION_ARG_SIZE (MODE, TYPE) > 8) \
948 /* Contrary to what you'd believe, defining FUNCTION_ARG_CALLEE_COPIES
949 seems like a (small total) loss, at least for gcc-2.7.2 compiling and
950 running gcc-2.1 (small win in size, small loss running -- 100.1%),
951 and similarly for size for products (.1 .. .3% bloat, sometimes win).
952 Due to the empirical likeliness of making slower code, it is not
955 /* This no longer *needs* to be a structure; but keeping it as such should
956 not hurt (and hacking the ABI is simpler). */
957 #define CUMULATIVE_ARGS struct cum_args
958 struct cum_args {int regs;};
960 /* The regs member is an integer, the number of arguments got into
961 registers so far, and lib is nonzero if init_cumulative_args was
962 found to generate a call to a library function. */
963 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT) \
966 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
968 = (FUNCTION_ARG_PASS_BY_REFERENCE(CUM, MODE, TYPE, NAMED) \
969 ? (CRIS_MAX_ARGS_IN_REGS) + 1 \
971 + (3 + (CRIS_FUNCTION_ARG_SIZE (MODE, TYPE))) / 4)))
973 #define FUNCTION_ARG_REGNO_P(REGNO) \
974 ((REGNO) >= CRIS_FIRST_ARG_REG \
975 && (REGNO) < CRIS_FIRST_ARG_REG + (CRIS_MAX_ARGS_IN_REGS))
978 /* Node: Scalar Return */
980 /* Let's assume all functions return in r[CRIS_FIRST_ARG_REG] for the
982 #define FUNCTION_VALUE(VALTYPE, FUNC) \
983 gen_rtx (REG, TYPE_MODE (VALTYPE), CRIS_FIRST_ARG_REG)
985 #define LIBCALL_VALUE(MODE) gen_rtx (REG, MODE, CRIS_FIRST_ARG_REG)
987 #define FUNCTION_VALUE_REGNO_P(N) ((N) == CRIS_FIRST_ARG_REG)
990 /* Node: Aggregate Return */
993 /* FIXME: Let's try this some time, so we return structures in registers.
994 We would cast the result of int_size_in_bytes to unsigned, so we will
995 get a huge number for "structures" of variable size (-1). */
996 #define RETURN_IN_MEMORY(TYPE) \
997 ((unsigned) int_size_in_bytes (TYPE) > CRIS_MAX_ARGS_IN_REGS * UNITS_PER_WORD)
1000 #define STRUCT_VALUE_REGNUM ((CRIS_FIRST_ARG_REG) - 1)
1003 /* Node: Caller Saves */
1004 /* (no definitions) */
1006 /* Node: Function entry */
1008 /* See cris.c for TARGET_ASM_FUNCTION_PROLOGUE and
1009 TARGET_ASM_FUNCTION_EPILOGUE. */
1011 /* If the epilogue uses the "ret" insn, we need to fill the
1013 #define DELAY_SLOTS_FOR_EPILOGUE cris_delay_slots_for_epilogue ()
1015 #define ELIGIBLE_FOR_EPILOGUE_DELAY(INSN, N) \
1016 cris_eligible_for_epilogue_delay (INSN)
1018 #define ASM_OUTPUT_MI_THUNK(FILE, THUNK_FNDECL, DELTA, FUNCTION) \
1019 cris_asm_output_mi_thunk(FILE, THUNK_FNDECL, DELTA, FUNCTION)
1022 /* Node: Profiling */
1024 #define FUNCTION_PROFILER(FILE, LABELNO) \
1025 error ("no FUNCTION_PROFILER for CRIS")
1027 /* FIXME: Some of the undefined macros might be mandatory. If so, fix
1033 /* We save the register number of the first anonymous argument in
1034 first_vararg_reg, and take care of this in the function prologue.
1035 This behaviour is used by at least one more port (the ARM?), but
1036 may be unsafe when compiling nested functions. (With varargs? Hairy.)
1037 Note that nested-functions is a GNU C extension.
1039 FIXME: We can actually put the size in PRETEND and deduce the number
1040 of registers from it in the prologue and epilogue. */
1041 #define SETUP_INCOMING_VARARGS(ARGSSF, MODE, TYPE, PRETEND, SECOND) \
1044 if ((ARGSSF).regs < (CRIS_MAX_ARGS_IN_REGS)) \
1045 (PRETEND) = ((CRIS_MAX_ARGS_IN_REGS) - (ARGSSF).regs) * 4; \
1046 if (TARGET_PDEBUG) \
1048 fprintf (asm_out_file, \
1049 "\n; VA:: %s: %d args before, anon @ #%d, %dtime\n", \
1050 current_function_varargs ? "OLD" : "ANSI", \
1051 (ARGSSF).regs, PRETEND, SECOND); \
1056 /* FIXME: This and other EXPAND_BUILTIN_VA_... target macros are not
1057 documented, although used by several targets. */
1058 #define EXPAND_BUILTIN_VA_ARG(VALIST, TYPE) \
1059 cris_expand_builtin_va_arg (VALIST, TYPE)
1062 /* Node: Trampolines */
1064 /* This looks too complicated, and it is. I assigned r7 to be the
1065 static chain register, but it is call-saved, so we have to save it,
1066 and come back to restore it after the call, so we have to save srp...
1067 Anyway, trampolines are rare enough that we can cope with this
1068 somewhat lack of elegance.
1069 (Do not be tempted to "straighten up" whitespace in the asms; the
1070 assembler #NO_APP state mandates strict spacing). */
1071 #define TRAMPOLINE_TEMPLATE(FILE) \
1074 fprintf (FILE, "\tmove.d $%s,[$pc+20]\n", \
1075 reg_names[STATIC_CHAIN_REGNUM]); \
1076 fprintf (FILE, "\tmove $srp,[$pc+22]\n"); \
1077 fprintf (FILE, "\tmove.d 0,$%s\n", \
1078 reg_names[STATIC_CHAIN_REGNUM]); \
1079 fprintf (FILE, "\tjsr 0\n"); \
1080 fprintf (FILE, "\tmove.d 0,$%s\n", \
1081 reg_names[STATIC_CHAIN_REGNUM]); \
1082 fprintf (FILE, "\tjump 0\n"); \
1086 #define TRAMPOLINE_SIZE 32
1088 /* CRIS wants instructions on word-boundary.
1089 Note that due to a bug (reported) in 2.7.2 and earlier, this is
1090 actually treated as alignment in _bytes_, not _bits_. (Obviously
1091 this is not fatal, only a slight waste of stack space). */
1092 #define TRAMPOLINE_ALIGNMENT 16
1094 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
1097 emit_move_insn (gen_rtx (MEM, SImode, \
1098 plus_constant (TRAMP, 10)), \
1100 emit_move_insn (gen_rtx (MEM, SImode, \
1101 plus_constant (TRAMP, 16)), \
1106 /* Note that there is no need to do anything with the cache for sake of
1110 /* Node: Library Calls */
1112 #define MULSI3_LIBCALL "__Mul"
1113 #define DIVSI3_LIBCALL "__Div"
1114 #define UDIVSI3_LIBCALL "__Udiv"
1115 #define MODSI3_LIBCALL "__Mod"
1116 #define UMODSI3_LIBCALL "__Umod"
1118 /* If you change this, you have to check whatever libraries and systems
1120 #define TARGET_EDOM 33
1123 /* Node: Addressing Modes */
1125 #define HAVE_POST_INCREMENT 1
1127 #define CONSTANT_ADDRESS_P(X) CONSTANT_P (X)
1129 #define MAX_REGS_PER_ADDRESS 2
1131 /* There are helper macros defined here which are used only in
1132 GO_IF_LEGITIMATE_ADDRESS.
1134 Note that you *have to* reject invalid addressing modes for mode
1135 MODE, even if it is legal for normal addressing modes. You cannot
1136 rely on the constraints to do this work. They can only be used to
1137 doublecheck your intentions. One example is that you HAVE TO reject
1138 (mem:DI (plus:SI (reg:SI x) (reg:SI y))) because for some reason
1139 this cannot be reloaded. (Which of course you can argue that gcc
1140 should have done.) FIXME: Strange. Check. */
1142 /* No symbol can be used as an index (or more correct, as a base) together
1143 with a register with PIC; the PIC register must be there. */
1144 #define CONSTANT_INDEX_P(X) \
1145 (CONSTANT_P (X) && !(flag_pic && cris_symbol (X)))
1147 /* True if X is a valid base register. */
1149 (REG_P (X) && REG_OK_FOR_BASE_P (X))
1151 /* True if X is a valid base register with or without autoincrement. */
1152 #define BASE_OR_AUTOINCR_P(X) \
1153 (BASE_P (X) || (GET_CODE (X) == POST_INC && BASE_P (XEXP (X, 0))))
1155 /* True if X is a valid (register) index for BDAP, i.e. [Rs].S or [Rs+].S. */
1156 #define BDAP_INDEX_P(X) \
1157 ((GET_CODE (X) == MEM && GET_MODE (X) == SImode \
1158 && BASE_OR_AUTOINCR_P (XEXP (X, 0))) \
1159 || (GET_CODE (X) == SIGN_EXTEND \
1160 && GET_CODE (XEXP (X, 0)) == MEM \
1161 && (GET_MODE (XEXP (X, 0)) == HImode \
1162 || GET_MODE (XEXP (X, 0)) == QImode) \
1163 && BASE_OR_AUTOINCR_P (XEXP (XEXP (X, 0), 0))))
1165 /* True if X is a valid (register) index for BIAP, i.e. Rd.m. */
1166 #define BIAP_INDEX_P(X) \
1167 ((BASE_P (X) && REG_OK_FOR_INDEX_P (X)) \
1168 || (GET_CODE (X) == MULT \
1169 && BASE_P (XEXP (X, 0)) \
1170 && REG_OK_FOR_INDEX_P (XEXP (X, 0)) \
1171 && GET_CODE (XEXP (X, 1)) == CONST_INT \
1172 && (INTVAL (XEXP (X, 1)) == 2 \
1173 || INTVAL (XEXP (X, 1)) == 4)))
1175 /* True if X is an address that doesn't need a prefix i.e. [Rs] or [Rs+]. */
1176 #define SIMPLE_ADDRESS_P(X) \
1178 || (GET_CODE (X) == POST_INC \
1179 && BASE_P (XEXP (X, 0))))
1181 /* A PIC operand looks like a normal symbol here. At output we dress it
1182 in "[rPIC+symbol:GOT]" (global symbol) or "rPIC+symbol:GOTOFF" (local
1183 symbol) so we exclude all addressing modes where we can't replace a
1184 plain "symbol" with that. A global PIC symbol does not fit anywhere
1185 here (but is thankfully a general_operand in itself). A local PIC
1186 symbol is valid for the plain "symbol + offset" case. */
1187 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
1190 if (SIMPLE_ADDRESS_P (X)) \
1192 if (CONSTANT_P (X) \
1194 || cris_gotless_symbol (X) \
1195 || ! cris_symbol (X))) \
1198 if (GET_CODE (X) == PLUS) \
1203 if ((BASE_P (x1) && CONSTANT_INDEX_P (x2)) \
1204 || (BASE_P (x2) && CONSTANT_INDEX_P (x1)) \
1205 /* BDAP Rs[+], Rd. */ \
1206 || (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \
1207 && ((BASE_P (x1) && BDAP_INDEX_P (x2)) \
1208 || (BASE_P (x2) && BDAP_INDEX_P (x1)) \
1209 /* BIAP.m Rs, Rd */ \
1210 || (BASE_P (x1) && BIAP_INDEX_P (x2)) \
1211 || (BASE_P (x2) && BIAP_INDEX_P (x1))))) \
1214 else if (GET_CODE (X) == MEM) \
1216 /* DIP (Rs). Reject [[reg+]] and [[reg]] for \
1217 DImode (long long). */ \
1218 if (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \
1219 && (BASE_P (XEXP (X, 0)) \
1220 || BASE_OR_AUTOINCR_P (XEXP (X, 0)))) \
1225 #ifndef REG_OK_STRICT
1226 /* Nonzero if X is a hard reg that can be used as a base reg
1227 or if it is a pseudo reg. */
1228 # define REG_OK_FOR_BASE_P(X) \
1229 (REGNO (X) <= CRIS_LAST_GENERAL_REGISTER \
1230 || REGNO (X) == ARG_POINTER_REGNUM \
1231 || REGNO (X) >= FIRST_PSEUDO_REGISTER)
1233 /* Nonzero if X is a hard reg that can be used as a base reg. */
1234 # define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
1237 #ifndef REG_OK_STRICT
1238 /* Nonzero if X is a hard reg that can be used as an index
1239 or if it is a pseudo reg. */
1240 # define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X)
1242 /* Nonzero if X is a hard reg that can be used as an index. */
1243 # define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
1246 /* For now, don't do anything. GCC does a good job most often.
1248 Maybe we could do something about gcc:s misbehaviour when it
1249 recalculates frame offsets for local variables, from fp+offs to
1250 sp+offs. The resulting address expression gets screwed up
1251 sometimes, but I'm not sure that it may be fixed here, since it is
1252 already split up in several instructions (Is this still true?).
1253 FIXME: Check and adjust for gcc-2.9x. */
1254 #define LEGITIMIZE_ADDRESS(X, OLDX, MODE, WIN) {}
1256 /* Functionality import from EGCS.
1257 Kludge to solve Axis-990219: Work around imperfection in
1258 reload_load_address1:
1259 (plus (sign_extend (mem:qi (reg))) (reg))
1260 should be reloaded as (plus (reg) (reg)), not
1261 (plus (sign_extend (reg)) (reg)).
1262 There are no checks that reload_load_address_1 "reloads"
1263 addresses correctly, so invalidness is not caught or
1265 When the right thing happens, the "something_reloaded" kludge can
1266 be removed. The right thing does not appear to happen for
1267 EGCS CVS as of this date (above). */
1269 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, IND_LEVELS, WIN) \
1272 if (GET_CODE (X) == PLUS \
1273 && REG_P (XEXP (X, 1)) \
1274 && GET_CODE (XEXP (X, 0)) == SIGN_EXTEND \
1275 && GET_CODE (XEXP (XEXP (X, 0), 0)) == MEM \
1276 && (GET_MODE (XEXP (XEXP (X, 0), 0)) == HImode \
1277 || GET_MODE (XEXP (XEXP (X, 0), 0)) == QImode) \
1278 && (REG_P (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1279 || (GET_CODE (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1281 && REG_P (XEXP (XEXP (XEXP (XEXP (X, 0), 0), 0), \
1284 int something_reloaded = 0; \
1286 if (REGNO (XEXP (X, 1)) >= FIRST_PSEUDO_REGISTER) \
1288 /* Second reg is pseudo, reload it. */ \
1289 push_reload (XEXP (X, 1), NULL_RTX, &XEXP (X, 1), \
1291 GENERAL_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1293 something_reloaded = 1; \
1296 if (REG_P (XEXP (XEXP (X, 0), 0)) \
1297 && (REGNO (XEXP (XEXP (X, 0), 0)) \
1298 >= FIRST_PSEUDO_REGISTER)) \
1300 /* First one is a pseudo - reload that. */ \
1301 push_reload (XEXP (XEXP (X, 0), 0), NULL_RTX, \
1302 &XEXP (XEXP (X, 0), 0), NULL, \
1304 GET_MODE (X), VOIDmode, 0, 0, OPNUM, TYPE); \
1305 something_reloaded = 1; \
1308 if (! something_reloaded \
1309 || (GET_CODE (XEXP (XEXP (X, 0), 0)) == POST_INC \
1310 && (REGNO (XEXP (XEXP (XEXP (X, 0), 0), 0)) \
1311 >= FIRST_PSEUDO_REGISTER))) \
1312 /* Reload the sign_extend. Happens if neither reg is a \
1313 pseudo, or the first one was inside post_increment. */ \
1314 push_reload (XEXP (X, 0), NULL_RTX, &XEXP (X, 0), NULL, \
1315 GENERAL_REGS, GET_MODE (X), VOIDmode, 0, 0, \
1322 /* In CRIS, only the postincrement address mode depends thus,
1323 since the increment depends on the size of the operand. */
1324 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
1327 if (GET_CODE (ADDR) == POST_INC) \
1332 #define LEGITIMATE_CONSTANT_P(X) 1
1335 /* Node: Condition Code */
1337 #define NOTICE_UPDATE_CC(EXP, INSN) cris_notice_update_cc (EXP, INSN)
1339 /* FIXME: Maybe define CANONICALIZE_COMPARISON later, when playing with
1340 optimizations. It is needed; currently we do this with instruction
1341 patterns and NOTICE_UPDATE_CC. */
1346 #define CONST_COSTS(RTX, CODE, OUTER_CODE) \
1348 if (INTVAL (RTX) == 0) \
1350 if (INTVAL (RTX) < 32 && INTVAL (RTX) >= -32) \
1352 /* Eight or 16 bits are a word and cycle more expensive. */ \
1353 if (INTVAL (RTX) <= 32767 && INTVAL (RTX) >= -32768) \
1355 /* A 32 bit constant (or very seldom, unsigned 16 bits) costs \
1356 another word. FIXME: This isn't linear to 16 bits. */ \
1362 /* For PIC, we need a prefix (if it isn't already there), \
1363 and the PIC register. For a global PIC symbol, we also need a \
1364 read of the GOT. */ \
1366 flag_pic ? (cris_got_symbol (RTX) ? (2 + 4 + 6) : (2 + 6)) : 6; \
1367 case CONST_DOUBLE: \
1368 if (RTX != CONST0_RTX (GET_MODE (RTX) == VOIDmode ? DImode \
1369 : GET_MODE (RTX))) \
1371 /* Make 0.0 cheap, else test-insns will not be used. */ \
1374 #define RTX_COSTS(X, CODE, OUTER_CODE) \
1376 /* Identify values that are no powers of two. Powers of 2 are \
1377 taken care of already and those values should not be \
1379 if (GET_CODE (XEXP (X, 1)) != CONST_INT \
1380 || exact_log2 (INTVAL (XEXP (X, 1)) < 0)) \
1382 /* If we have a multiply insn, then the cost is between \
1383 1 and 2 "fast" instructions. */ \
1384 if (TARGET_HAS_MUL_INSNS) \
1385 return COSTS_N_INSNS (1) + COSTS_N_INSNS (1) /2; \
1387 /* Estimate as 4 + 4 * #ofbits. */ \
1388 return COSTS_N_INSNS (132); \
1395 if (GET_CODE (XEXP (X, 1)) != CONST_INT \
1396 || exact_log2 (INTVAL (XEXP (X, 1)) < 0)) \
1397 /* Estimate this as 4 + 8 * #of bits. */ \
1398 return COSTS_N_INSNS (260); \
1401 if (GET_CODE (XEXP (X, 1)) == CONST_INT \
1402 /* Two constants may actually happen before optimization. */ \
1403 && GET_CODE (XEXP (X, 0)) != CONST_INT \
1404 && !CONST_OK_FOR_LETTER_P (INTVAL (XEXP (X, 1)), 'I')) \
1406 rtx_cost (XEXP (X, 0), OUTER_CODE) + 2 \
1407 + 2 * GET_MODE_NUNITS (GET_MODE (XEXP (X, 0))); \
1409 case ZERO_EXTEND: case SIGN_EXTEND: \
1410 /* Same as move. If embedded in other insn, cost is 0. */ \
1411 return rtx_cost (XEXP (X, 0), OUTER_CODE);
1413 #define ADDRESS_COST(X) cris_address_cost (X)
1415 /* FIXME: Need to define REGISTER_MOVE_COST when more register classes are
1418 /* This isn't strictly correct for v0..3 in buswidth-8bit mode, but
1420 #define MEMORY_MOVE_COST(M, CLASS, IN) \
1421 (((M) == QImode) ? 4 : ((M) == HImode) ? 4 : 6)
1423 /* Regardless of the presence of delay slots, the default value of 1 for
1424 BRANCH_COST is the best in the range (1, 2, 3), tested with gcc-2.7.2
1425 with testcases ipps and gcc, giving smallest and fastest code. */
1427 #define SLOW_BYTE_ACCESS 0
1429 /* This is the threshold *below* which inline move sequences of
1430 word-length sizes will be emitted. The "9" will translate to
1431 (9 - 1) * 4 = 32 bytes maximum moved, but using 16 instructions
1432 (8 instruction sequences) or less. */
1433 #define MOVE_RATIO 9
1436 /* Node: Sections */
1438 #define TEXT_SECTION_ASM_OP "\t.text"
1440 #define DATA_SECTION_ASM_OP "\t.data"
1442 #define FORCE_EH_FRAME_INFO_IN_DATA_SECTION (! TARGET_ELF)
1444 /* The jump table is immediately connected to the preceding insn. */
1445 #define JUMP_TABLES_IN_TEXT_SECTION 1
1447 /* We need to code in PIC-specific flags into SYMBOL_REF_FLAG. */
1449 #define ENCODE_SECTION_INFO(EXP) cris_encode_section_info (EXP)
1451 /* We pull a little trick to register the _fini function with atexit,
1452 after (presumably) registering the eh frame info, since we don't handle
1453 _fini (a.k.a. ___fini_start) in crt0 or have a crti for "pure" ELF. */
1455 # define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC) \
1456 static void __attribute__((__used__)) \
1457 call_ ## FUNC (void) \
1460 if (__builtin_strcmp (#FUNC, "__do_global_ctors_aux") == 0) \
1462 extern void __fini__start (void); \
1463 atexit (__fini__start); \
1466 asm (TEXT_SECTION_ASM_OP); \
1472 #define PIC_OFFSET_TABLE_REGNUM 0
1474 #define LEGITIMATE_PIC_OPERAND_P(X) cris_legitimate_pic_operand (X)
1477 /* Node: File Framework */
1479 /* NO_APP *only at file start* means faster assembly.
1480 It also means comments are not allowed.
1481 In some cases comments will be output for debugging purposes.
1482 Make sure they are allowed then. */
1483 /* Override previous definitions (elfos.h). */
1484 #undef ASM_FILE_START
1485 #define ASM_FILE_START(STREAM) \
1488 if (TARGET_PDEBUG || flag_print_asm_name) \
1489 fprintf ((STREAM), "#APP\n"); \
1491 fprintf ((STREAM), "#NO_APP\n"); \
1493 output_file_directive ((STREAM), main_input_filename); \
1497 /* Override previous definitions (elfos.h). */
1499 #define ASM_FILE_END(STREAM)
1501 /* We don't want an .ident for gcc. To avoid that but still support
1502 #ident, we override ASM_OUTPUT_IDENT and, since the gcc .ident is its
1503 only use besides ASM_OUTPUT_IDENT, undef IDENT_ASM_OP from elfos.h. */
1505 #undef ASM_OUTPUT_IDENT
1506 #define ASM_OUTPUT_IDENT(FILE, NAME) \
1507 fprintf (FILE, "%s\"%s\"\n", "\t.ident\t", NAME);
1509 #define ASM_APP_ON "#APP\n"
1511 #define ASM_APP_OFF "#NO_APP\n"
1514 /* Node: Data Output */
1516 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) (C) == '@'
1518 /* Node: Uninitialized Data */
1520 /* Remember to round off odd values if we want data alignment,
1521 since we cannot do that with an .align directive.
1523 Using .comm causes the space not to be reserved in .bss, but by
1524 tricks with the symbol type. Not good if other tools than binutils
1525 are used on the object files. Since ".global ... .lcomm ..." works, we
1526 use that. Use .._ALIGNED_COMMON, since gcc whines when we only have
1527 ..._COMMON, and we prefer to whine ourselves; BIGGEST_ALIGNMENT is not
1528 the one to check. This done for a.out only. */
1529 /* FIXME: I suspect a bug in gcc with alignment. Do not warn until
1530 investigated; it mucks up the testsuite results. */
1531 #define CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, LOCAL) \
1534 int align_ = (ALIGN) / BITS_PER_UNIT; \
1535 if (TARGET_DATA_ALIGN && TARGET_ALIGN_BY_32 && align_ < 4) \
1537 else if (TARGET_DATA_ALIGN && align_ < 2) \
1539 /* FIXME: Do we need this? */ \
1540 else if (align_ < 1) \
1547 fprintf ((FILE), "%s", LOCAL_ASM_OP); \
1548 assemble_name ((FILE), (NAME)); \
1549 fprintf ((FILE), "\n"); \
1551 fprintf ((FILE), "%s", COMMON_ASM_OP); \
1552 assemble_name ((FILE), (NAME)); \
1553 fprintf ((FILE), ",%u,%u\n", (SIZE), align_); \
1557 /* We can't tell a one-only or weak COMM from a "global \
1558 COMM" so just make all non-locals weak. */ \
1560 ASM_WEAKEN_LABEL (FILE, NAME); \
1561 fputs ("\t.lcomm ", (FILE)); \
1562 assemble_name ((FILE), (NAME)); \
1563 fprintf ((FILE), ",%u\n", \
1564 ((SIZE) + (align_ - 1)) & ~(align_ - 1)); \
1569 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
1570 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 0)
1572 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
1573 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
1574 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 1)
1576 /* FIXME: define ASM_OUTPUT_SHARED_COMMON and emit an error when it is
1577 used with -melinux and a.out. */
1579 /* Node: Label Output */
1581 #define ASM_OUTPUT_LABEL(FILE, NAME) \
1584 assemble_name (FILE, NAME); \
1585 fputs (":\n", FILE); \
1589 #define ASM_GLOBALIZE_LABEL(FILE, NAME) \
1592 fputs ("\t.global ", FILE); \
1593 assemble_name (FILE, NAME); \
1594 fputs ("\n", FILE); \
1598 #define SUPPORTS_WEAK 1
1600 /* FIXME: This macro isn't documented, but this would probably be an
1601 appropriate location. It's only used in crtstuff.c, else we'd have to
1602 handle (to #undef or ignore it) in a.out. */
1603 #define HAVE_GAS_HIDDEN 1
1605 #undef ASM_OUTPUT_INTERNAL_LABEL
1606 #define ASM_OUTPUT_INTERNAL_LABEL(FILE, PREFIX, NUM) \
1609 asm_fprintf (FILE, "%L%s%d:\n", PREFIX, NUM); \
1613 /* Remove any previous definition (elfos.h). */
1614 #undef ASM_GENERATE_INTERNAL_LABEL
1615 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
1616 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long) NUM)
1618 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
1621 (OUTPUT) = (char *) alloca (strlen ((NAME)) + 10); \
1622 sprintf ((OUTPUT), "%s.%d", (NAME), (LABELNO)); \
1627 /* Node: Initialization */
1628 /* (no definitions) */
1630 /* Node: Macros for Initialization */
1631 /* (no definitions) */
1633 /* Node: Instruction Output */
1635 #define REGISTER_NAMES \
1636 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
1637 "r9", "r10", "r11", "r12", "r13", "sp", "pc", "srp", "faked_ap"}
1639 #define ADDITIONAL_REGISTER_NAMES \
1640 {{"r14", 14}, {"r15", 15}}
1642 #define PRINT_OPERAND(FILE, X, CODE) \
1643 cris_print_operand (FILE, X, CODE)
1645 /* For delay-slot handling. */
1646 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) (CODE == '#')
1648 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
1649 cris_print_operand_address (FILE, ADDR)
1651 /* Output an empty line to illustrate the presence of the delay slot. */
1652 #define DBR_OUTPUT_SEQEND(FILE) \
1653 fprintf (FILE, "\n")
1655 #define LOCAL_LABEL_PREFIX (TARGET_ELF ? "." : "")
1657 /* cppinit.c initializes a const array from this, so it must be constant,
1658 can't have it different based on options. Luckily, the prefix is
1659 always allowed, so let's have it on all GCC-generated code. Note that
1660 we have this verbatim everywhere in the back-end, not using %R or %s or
1662 #define REGISTER_PREFIX "$"
1664 /* Remove any previous definition (elfos.h). */
1665 /* We use -fno-leading-underscore to remove it, when necessary. */
1666 #undef USER_LABEL_PREFIX
1667 #define USER_LABEL_PREFIX "_"
1669 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \
1670 fprintf (FILE, "\tpush $%s\n", reg_names[REGNO])
1672 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \
1673 fprintf (FILE, "\tpop $%s\n", reg_names[REGNO])
1676 /* Node: Dispatch Tables */
1678 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
1679 asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL)
1681 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
1682 asm_fprintf (FILE, "\t.dword %LL%d\n", VALUE)
1684 /* Defined to also emit an .align in elfos.h. We don't want that. */
1685 #undef ASM_OUTPUT_CASE_LABEL
1687 /* Since the "bound" insn loads the comparison value if the compared<
1688 value (register) is out of bounds (0..comparison value-1), we need
1689 to output another case to catch it.
1690 The way to find it is to look for the label_ref at the else-arm inside
1691 the expanded casesi core-insn.
1692 FIXME: Check this construct when changing to new version of gcc. */
1693 #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) \
1696 asm_fprintf (STREAM, "\t.word %LL%d-%LL%d%s\n", \
1700 (PATTERN (PREV_INSN (PREV_INSN \
1702 0, 0), 1), 2), 0)), \
1704 (TARGET_PDEBUG ? "; default" : "")); \
1709 /* Node: Exception Region Output */
1710 /* (no definitions) */
1711 /* FIXME: Fill in with our own optimized layout. */
1713 /* Node: Alignment Output */
1715 #define ASM_OUTPUT_ALIGN(FILE, LOG) \
1716 fprintf (FILE, "\t.align %d\n", (LOG))
1719 /* Node: All Debuggers */
1721 #define DBX_REGISTER_NUMBER(REGNO) \
1722 ((REGNO) == CRIS_SRP_REGNUM ? CRIS_CANONICAL_SRP_REGNUM : (REGNO))
1724 /* FIXME: Investigate DEBUGGER_AUTO_OFFSET, DEBUGGER_ARG_OFFSET. */
1727 /* Node: DBX Options */
1729 /* Is this correct? Check later. */
1730 #define DBX_NO_XREFS
1732 #define DBX_CONTIN_LENGTH 0
1734 /* FIXME: Is this needed when we have 0 DBX_CONTIN_LENGTH? */
1735 #define DBX_CONTIN_CHAR '?'
1738 /* Node: DBX Hooks */
1739 /* (no definitions) */
1741 /* Node: File names and DBX */
1742 /* (no definitions) */
1745 /* Node: SDB and DWARF */
1747 #define DWARF_LINE_MIN_INSTR_LENGTH 2
1750 /* Node: Cross-compilation */
1751 #define REAL_ARITHMETIC
1756 /* FIXME: Check this one more time. */
1757 #define PREDICATE_CODES \
1758 {"cris_orthogonal_operator", \
1759 {PLUS, MINUS, IOR, AND, UMIN}}, \
1760 {"cris_commutative_orth_op", \
1761 {PLUS, IOR, AND, UMIN}}, \
1762 {"cris_operand_extend_operator", \
1763 {PLUS, MINUS, UMIN}}, \
1764 {"cris_extend_operator", \
1765 {ZERO_EXTEND, SIGN_EXTEND}}, \
1766 {"cris_plus_or_bound_operator", \
1768 {"cris_bdap_operand", \
1769 {SUBREG, REG, LABEL_REF, SYMBOL_REF, MEM, CONST_INT, \
1770 CONST_DOUBLE, CONST, SIGN_EXTEND}}, \
1771 {"cris_bdap_biap_operand", \
1772 {SUBREG, REG, LABEL_REF, SYMBOL_REF, MEM, CONST_INT, \
1773 CONST_DOUBLE, CONST, SIGN_EXTEND, MULT}}, \
1774 {"cris_general_operand_or_gotless_symbol", \
1775 {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \
1776 LABEL_REF, SUBREG, REG, MEM}}, \
1777 {"cris_general_operand_or_symbol", \
1778 {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \
1779 LABEL_REF, SUBREG, REG, MEM}}, \
1780 {"cris_general_operand_or_plt_symbol", \
1781 {CONST_INT, CONST_DOUBLE, CONST, SYMBOL_REF, \
1782 LABEL_REF, SUBREG, REG, MEM}}, \
1783 {"cris_mem_call_operand", \
1786 /* A combination of the bound (umin) insn together with a
1787 sign-extended add via the table to PC seems optimal.
1788 If the table overflows, the assembler will take care of it.
1789 Theoretically, in extreme cases (uncertain if they occur), an error
1790 will be emitted, so FIXME: Check how large case-tables are emitted,
1791 possible add an option to emit SImode case-tables. */
1792 #define CASE_VECTOR_MODE HImode
1794 #define CASE_VECTOR_PC_RELATIVE 1
1796 /* FIXME: Investigate CASE_VECTOR_SHORTEN_MODE to make sure HImode is not
1797 used when broken-.word could possibly fail (plus test-case). */
1799 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1801 /* This is the number of bytes that can be moved in one
1802 reasonably fast instruction sequence. For CRIS, this is two
1803 instructions: mem => reg, reg => mem. */
1806 /* Maybe SHIFT_COUNT_TRUNCATED is safe to define? FIXME: Check later. */
1808 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1810 #define STORE_FLAG_VALUE 1
1812 #define Pmode SImode
1814 #define FUNCTION_MODE QImode
1816 #define NO_IMPLICIT_EXTERN_C
1820 * eval: (c-set-style "gnu")
1821 * indent-tabs-mode: t
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