1 /* Definitions for GCC. Part of the machine description for CRIS.
2 Copyright (C) 1998-2017 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 3, 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 COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 /* After the first "Node:" comment comes all preprocessor directives and
22 attached declarations described in the info files, the "Using and
23 Porting GCC" manual (uapgcc), in the same order as found in the "Target
24 macros" section in the gcc-2.9x CVS edition of 2000-03-17. FIXME: Not
25 really, but needs an update anyway.
27 There is no generic copy-of-uapgcc comment, you'll have to see uapgcc
28 for that. If applicable, there is a CRIS-specific comment. The order
29 of macro definitions follow the order in the manual. Every section in
30 the manual (node in the info pages) has an introductory `Node:
31 <subchapter>' comment. If no macros are defined for a section, only
32 the section-comment is present. */
34 /* Note that other header files (e.g. config/elfos.h, config/linux.h,
35 and config/cris/linux.h) are responsible for lots of settings not
36 repeated below. This file contains general CRIS definitions
37 and definitions for the cris-*-elf subtarget. */
39 /* We don't want to use gcc_assert for everything, as that can be
41 #define CRIS_ASSERT(x) \
42 do { if (!(x)) internal_error ("CRIS-port assertion failed: " #x); } while (0)
44 /* Replacement for REG_P since it does not match SUBREGs. Happens for
45 testcase Axis-20000320 with gcc-2.9x. */
47 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (XEXP (x, 0))))
49 /* Last register in main register bank r0..r15. */
50 #define CRIS_LAST_GENERAL_REGISTER 15
52 /* Descriptions of registers used for arguments. */
53 #define CRIS_FIRST_ARG_REG 10
54 #define CRIS_MAX_ARGS_IN_REGS 4
56 /* See also *_REGNUM constants in cris.md. */
58 /* Most of the time, we need the index into the register-names array.
59 When passing debug-info, we need the real hardware register number. */
60 #define CRIS_CANONICAL_SRP_REGNUM (16 + 11)
61 #define CRIS_CANONICAL_MOF_REGNUM (16 + 7)
62 /* We have CCR in all models including v10, but that's 16 bits, so let's
63 prefer the DCCR number, which is a DMA pointer in pre-v8, so we'll
64 never clash with it for GCC purposes. */
65 #define CRIS_CANONICAL_CC0_REGNUM (16 + 13)
67 /* When generating PIC, these suffixes are added to the names of non-local
68 functions when being output. Contrary to other ports, we have offsets
69 relative to the GOT, not the PC. We might implement PC-relative PLT
70 semantics later for the general case; they are used in some cases right
71 now, such as MI thunks. */
72 #define CRIS_GOTPLT_SUFFIX ":GOTPLT"
73 #define CRIS_PLT_GOTOFFSET_SUFFIX ":PLTG"
74 #define CRIS_PLT_PCOFFSET_SUFFIX ":PLT"
76 #define CRIS_FUNCTION_ARG_SIZE(MODE, TYPE) \
77 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \
78 : (unsigned) int_size_in_bytes (TYPE))
80 /* Which CPU version this is. The parsed and adjusted cris_cpu_str. */
81 extern int cris_cpu_version
;
86 /* Also provide canonical vN definitions when user specifies an alias. */
89 "%{mtune=*:-D__tune_%* %{mtune=v*:-D__CRIS_arch_tune=%*}\
90 %{mtune=etrax4:-D__tune_v3 -D__CRIS_arch_tune=3}\
91 %{mtune=etrax100:-D__tune_v8 -D__CRIS_arch_tune=8}\
92 %{mtune=svinto:-D__tune_v8 -D__CRIS_arch_tune=8}\
93 %{mtune=etrax100lx:-D__tune_v10 -D__CRIS_arch_tune=10}\
94 %{mtune=ng:-D__tune_v10 -D__CRIS_arch_tune=10}}\
95 %{mcpu=*:-D__arch_%* %{mcpu=v*:-D__CRIS_arch_version=%*}\
96 %{mcpu=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
97 %{mcpu=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
98 %{mcpu=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
99 %{mcpu=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
100 %{mcpu=ng:-D__arch_v10 -D__CRIS_arch_version=10}}\
101 %{march=*:-D__arch_%* %{march=v*:-D__CRIS_arch_version=%*}\
102 %{march=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
103 %{march=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
104 %{march=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
105 %{march=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
106 %{march=ng:-D__arch_v10 -D__CRIS_arch_version=10}}\
107 %{metrax100:-D__arch__v8 -D__CRIS_arch_version=8}\
108 %{metrax4:-D__arch__v3 -D__CRIS_arch_version=3}\
111 /* For the cris-*-elf subtarget. */
113 #define CRIS_DEFAULT_TUNE "10"
114 #define CRIS_ARCH_CPP_DEFAULT
115 #define CRIS_DEFAULT_ASM_ARCH_OPTION ""
117 #ifdef TARGET_CPU_DEFAULT
118 #if TARGET_CPU_DEFAULT != 32 && TARGET_CPU_DEFAULT != 10
119 #error "Due to '()'; e.g. '#define TARGET_CPU_DEFAULT (10)', stringize TARGET_CPU_DEFAULT isn't useful: update manually."
122 #if TARGET_CPU_DEFAULT == 32
123 #undef CRIS_DEFAULT_TUNE
124 #define CRIS_DEFAULT_TUNE "32"
125 /* To enable use of "generic" cris-axis-elf binutils, always pass the
126 architecture option to GAS. (We don't do this for non-v32.) */
127 #undef CRIS_DEFAULT_ASM_ARCH_OPTION
128 #define CRIS_DEFAULT_ASM_ARCH_OPTION "--march=v32"
131 #undef CRIS_ARCH_CPP_DEFAULT
132 #define CRIS_ARCH_CPP_DEFAULT \
136 %{!mtune=*:-D__tune_v" CRIS_DEFAULT_TUNE "}\
137 -D__arch_v" CRIS_DEFAULT_TUNE \
138 " -D__CRIS_arch_version=" CRIS_DEFAULT_TUNE "}}}"
141 #define CRIS_CPP_SUBTARGET_SPEC \
142 "%{mbest-lib-options:\
143 %{!moverride-best-lib-options:\
144 %{!march=*:%{!metrax*:%{!mcpu=*:\
145 -D__tune_v" CRIS_DEFAULT_TUNE \
146 " -D__CRIS_arch_tune=" CRIS_DEFAULT_TUNE "}}}}}"\
147 CRIS_ARCH_CPP_DEFAULT
149 /* Override previous definitions (../linux.h). */
152 "%{metrax4:-march=v3}\
153 %{metrax100:-march=v8}\
154 %{march=*:-march=%*}\
158 /* For the cris-*-elf subtarget. */
159 #define CRIS_CC1_SUBTARGET_SPEC \
161 %{mbest-lib-options:\
162 %{!moverride-best-lib-options:\
163 %{!march=*:%{!mcpu=*:-mtune=v" CRIS_DEFAULT_TUNE\
164 " -D__CRIS_arch_tune=" CRIS_DEFAULT_TUNE "}}\
165 %{!finhibit-size-directive:\
166 %{!fno-function-sections: -ffunction-sections}\
167 %{!fno-data-sections: -fdata-sections}}}}"
169 /* This adds to CC1_SPEC. */
170 #define CC1PLUS_SPEC ""
172 #ifdef HAVE_AS_NO_MUL_BUG_ABORT_OPTION
173 #define MAYBE_AS_NO_MUL_BUG_ABORT \
174 "%{mno-mul-bug-workaround:-no-mul-bug-abort} "
176 #define MAYBE_AS_NO_MUL_BUG_ABORT
179 /* Override previous definitions (../linux.h). */
182 MAYBE_AS_NO_MUL_BUG_ABORT \
184 %{march=*:%{mcpu=*:%edo not specify both -march=... and -mcpu=...}}\
185 %{march=v0|mcpu=v0|march=v3|mcpu=v3|march=v8|mcpu=v8:--march=v0_v10}\
186 %{march=v10|mcpu=v10:--march=v10}\
187 %{march=v32|mcpu=v32:--march=v32}"
189 /* For the cris-*-elf subtarget. */
190 #define CRIS_ASM_SUBTARGET_SPEC \
191 "--em=criself %{!march=*:%{!mcpu=*:" CRIS_DEFAULT_ASM_ARCH_OPTION "}}"
193 /* FIXME: We should propagate the -melf option to make the criself
194 "emulation" unless a linker script is provided (-T*), but I don't know
195 how to do that if either of -Ttext, -Tdata or -Tbss is given but no
196 linker script, as is usually the case. Leave it to the user for the
203 /* For the cris-*-elf subtarget. */
204 #define CRIS_LINK_SUBTARGET_SPEC \
206 %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\
207 %{!r:%{O2|O3: --gc-sections}}"
209 /* Which library to get. The simulator uses a different library for
210 the low-level syscalls (implementing the Linux syscall ABI instead
211 of direct-iron accesses). Default everything with the stub "nosys"
213 /* Override previous definitions (linux.h). */
216 "%{sim*:--start-group -lc -lsyslinux --end-group}\
218 %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\
221 /* Linker startfile options; crt0 flavors.
222 We need to remove any previous definition (elfos.h). */
223 #undef STARTFILE_SPEC
224 #define STARTFILE_SPEC \
225 "%{sim*:crt1.o%s}%{!sim*:crt0.o%s}\
226 crti.o%s crtbegin.o%s"
229 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
231 #define EXTRA_SPECS \
232 {"cpp_subtarget", CRIS_CPP_SUBTARGET_SPEC}, \
233 {"cc1_subtarget", CRIS_CC1_SUBTARGET_SPEC}, \
234 {"asm_subtarget", CRIS_ASM_SUBTARGET_SPEC}, \
235 {"link_subtarget", CRIS_LINK_SUBTARGET_SPEC}, \
236 CRIS_SUBTARGET_EXTRA_SPECS
238 #define CRIS_SUBTARGET_EXTRA_SPECS
241 /* Node: Run-time Target */
243 #define TARGET_CPU_CPP_BUILTINS() \
246 builtin_define_std ("cris"); \
247 builtin_define_std ("CRIS"); \
248 builtin_define_std ("GNU_CRIS"); \
249 builtin_define ("__CRIS_ABI_version=2"); \
250 builtin_assert ("cpu=cris"); \
251 builtin_assert ("machine=cris"); \
255 /* Previously controlled by target_flags. Note that this is *not* set
257 #define TARGET_LINUX 0
259 /* For the cris-*-elf subtarget. */
260 #define CRIS_SUBTARGET_DEFAULT 0
262 #define CRIS_CPU_BASE 0
263 #define CRIS_CPU_ETRAX4 3 /* Just lz added. */
264 #define CRIS_CPU_SVINTO 8 /* Added swap, jsrc & Co., 32-bit accesses. */
265 #define CRIS_CPU_NG 10 /* Added mul[su]. */
266 #define CRIS_CPU_V32 32 /* Major changes. */
268 #ifndef TARGET_CPU_DEFAULT
269 #define TARGET_CPU_DEFAULT CRIS_CPU_BASE
272 /* Default target_flags if no switches specified.
273 The alignment-by-32 is to make builtin atomic support for v10 and v32
274 work for *-elf for types without specified alignment (like plain
275 "int"). See top comment in sync.md. */
276 #ifndef TARGET_DEFAULT
277 # if TARGET_CPU_DEFAULT == 32
278 # define TARGET_DEFAULT \
280 + MASK_CONST_ALIGN + MASK_DATA_ALIGN \
282 + MASK_PROLOGUE_EPILOGUE)
283 # elif TARGET_CPU_DEFAULT == 10
284 # define TARGET_DEFAULT \
285 (MASK_SIDE_EFFECT_PREFIXES + MASK_STACK_ALIGN \
286 + MASK_CONST_ALIGN + MASK_DATA_ALIGN \
288 + MASK_PROLOGUE_EPILOGUE + MASK_MUL_BUG)
290 # define TARGET_DEFAULT \
291 (MASK_SIDE_EFFECT_PREFIXES + MASK_STACK_ALIGN \
292 + MASK_CONST_ALIGN + MASK_DATA_ALIGN \
293 + MASK_PROLOGUE_EPILOGUE + MASK_MUL_BUG)
297 /* Local, providing a default for cris_cpu_version. */
298 #define CRIS_DEFAULT_CPU_VERSION TARGET_CPU_DEFAULT
300 #define TARGET_HAS_MUL_INSNS (cris_cpu_version >= CRIS_CPU_NG)
301 #define TARGET_HAS_LZ (cris_cpu_version >= CRIS_CPU_ETRAX4)
302 #define TARGET_HAS_BREAK (cris_cpu_version >= CRIS_CPU_ETRAX4)
303 #define TARGET_HAS_SWAP (cris_cpu_version >= CRIS_CPU_SVINTO)
304 #define TARGET_V32 (cris_cpu_version >= CRIS_CPU_V32)
306 /* The "break" instruction was introduced with ETRAX 4. */
307 #define TARGET_TRAP_USING_BREAK8 \
308 (cris_trap_using_break8 == 2 ? TARGET_HAS_BREAK : cris_trap_using_break8)
310 /* Call library functions by default for GNU/Linux. */
311 #define TARGET_ATOMICS_MAY_CALL_LIBFUNCS \
312 (cris_atomics_calling_libfunc == 2 \
313 ? TARGET_LINUX : cris_atomics_calling_libfunc)
315 /* The < v10 atomics turn off interrupts, so they don't need alignment.
316 Incidentally, by default alignment is off there causing variables to
317 be default unaligned all over, so we'd have to make support
318 libraries use a proper atomic type (instead of "int"), one we'd
319 specify as aligned. */
320 #define TARGET_TRAP_UNALIGNED_ATOMIC \
321 (cris_trap_unaligned_atomic == 2 \
322 ? (TARGET_V32 || cris_cpu_version == 10) \
323 : cris_trap_unaligned_atomic)
325 /* Node: Storage Layout */
327 #define BITS_BIG_ENDIAN 0
329 #define BYTES_BIG_ENDIAN 0
331 /* WORDS_BIG_ENDIAN is not defined in the hardware, but for consistency,
332 we use little-endianness, and we may also be able to use
333 post-increment on DImode indirect. */
334 #define WORDS_BIG_ENDIAN 0
336 #define UNITS_PER_WORD 4
338 #define CRIS_PROMOTED_MODE(MODE, UNSIGNEDP, TYPE) \
339 (GET_MODE_CLASS (MODE) == MODE_INT && GET_MODE_SIZE (MODE) < 4) \
342 /* We will be using prototype promotion, so they will be 32 bit. */
343 #define PARM_BOUNDARY 32
345 /* Stack boundary is guided by -mstack-align, -mno-stack-align,
347 Old comment: (2.1: still valid in 2.7.2?)
348 Note that to make this macro affect the alignment of stack
349 locals, a fix was required, and special precautions when handling
350 the stack pointer in various other macros (TARGET_ASM_FUNCTION_PROLOGUE
351 et al) were required. See file "function.c". If you would just define
352 this macro, it would only affect the builtin alloca and variable
353 local data (non-ANSI, non-K&R, Gnu C extension). */
354 #define STACK_BOUNDARY \
355 (TARGET_STACK_ALIGN ? (TARGET_ALIGN_BY_32 ? 32 : 16) : 8)
357 #define FUNCTION_BOUNDARY 16
359 /* Do not change BIGGEST_ALIGNMENT (when optimizing), as it will affect
360 strange places, at least in 2.1. */
361 #define BIGGEST_ALIGNMENT 8
363 /* If -m16bit, -m16-bit, -malign or -mdata-align,
364 align everything to 16 bit. */
365 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \
367 ? (TARGET_ALIGN_BY_32 \
368 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \
369 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
371 /* Note that CONSTANT_ALIGNMENT has the effect of making gcc believe that
372 ALL references to constant stuff (in code segment, like strings) has
373 this alignment. That is a rather rushed assumption. Luckily we do not
374 care about the "alignment" operand to builtin memcpy (only place where
375 it counts), so it doesn't affect any bad spots. */
376 #define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \
377 (TARGET_CONST_ALIGN \
378 ? (TARGET_ALIGN_BY_32 \
379 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \
380 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
382 /* FIXME: Define LOCAL_ALIGNMENT for word and dword or arrays and
383 structures (if -mstack-align=), and check that it is good. */
385 #define EMPTY_FIELD_BOUNDARY 8
387 #define STRUCTURE_SIZE_BOUNDARY 8
389 #define STRICT_ALIGNMENT 0
391 /* Remove any previous definition (elfos.h).
392 ??? If it wasn't for all the other stuff that affects layout of
393 structures and bit-fields, this could presumably cause incompatibility
394 with other GNU/Linux ports (i.e. elfos.h users). */
395 #undef PCC_BITFIELD_TYPE_MATTERS
397 /* This is only used for non-scalars. Strange stuff happens to structs
398 (FIXME: What?) if we use anything larger than largest actually used
399 datum size, so lets make it 32. The type "long long" will still work
400 as usual. We can still have DImode insns, but they will only be used
401 for scalar data (i.e. long long). */
402 #define MAX_FIXED_MODE_SIZE 32
405 /* Node: Type Layout */
407 /* Note that DOUBLE_TYPE_SIZE is not defined anymore, since the default
408 value gives a 64-bit double, which is what we now use. */
410 /* For compatibility and historical reasons, a char should be signed. */
411 #define DEFAULT_SIGNED_CHAR 1
413 /* Note that WCHAR_TYPE_SIZE is used in cexp.y,
414 where TARGET_SHORT is not available. */
416 #define WCHAR_TYPE "long int"
418 #undef WCHAR_TYPE_SIZE
419 #define WCHAR_TYPE_SIZE 32
422 /* Node: Register Basics */
424 /* We count all 16 non-special registers, SRP, a faked argument
425 pointer register, MOF and CCR/DCCR. */
426 #define FIRST_PSEUDO_REGISTER (16 + 1 + 1 + 1 + 1)
428 /* For CRIS, these are r15 (pc) and r14 (sp). Register r8 is used as a
429 frame-pointer, but is not fixed. SRP is not included in general
430 registers and will not be used automatically. All other special
431 registers are fixed at the moment. The faked argument pointer register
433 #define FIXED_REGISTERS \
434 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1}
436 /* Register r9 is used for structure-address, r10-r13 for parameters,
437 r10- for return values. */
438 #define CALL_USED_REGISTERS \
439 {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1}
441 /* Node: Allocation Order */
443 /* We need this on CRIS, because call-used regs should be used first,
444 (so we don't need to push). Else start using registers from r0 and up.
445 This preference is mainly because if we put call-used-regs from r0
446 and up, then we can't use movem to push the rest, (which have to be
447 saved if we use them, and movem has to start with r0).
448 Change here if you change which registers to use as call registers.
450 The actual need to explicitly prefer call-used registers improved the
451 situation a lot for 2.1, but might not actually be needed anymore.
452 Still, this order reflects what GCC should find out by itself, so it
453 probably does not hurt.
455 Order of preference: Call-used-regs first, then r0 and up, last fp &
457 Call-used regs in opposite order, so they will cause less conflict if
458 a function has few args (<= 3) and it wants a scratch reg.
459 Use struct-return address first, since very few functions use
460 structure return values so it is likely to be available. */
461 #define REG_ALLOC_ORDER \
462 {9, 13, 12, 11, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15, 17, 16, 18, 19}
464 /* Use MOF and ACR. Prefer ACR before any other register. Prefer MOF
465 then SRP after saved registers. The *after* is because they're only
466 useful for storage, not for things being computed, which is
467 apparently more common. */
468 #define REG_ALLOC_ORDER_V32 \
469 {15, 9, 13, 12, 11, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 17, 16, 14, 18, 19}
472 /* Node: Values in Registers */
474 /* The VOIDmode test is so we can omit mode on anonymous insns. FIXME:
475 Still needed in 2.9x, at least for Axis-20000319. */
476 #define HARD_REGNO_NREGS(REGNO, MODE) \
478 ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
480 /* Because CCmode isn't covered by the "narrower mode" statement in
481 tm.texi, we can still say all modes are tieable despite not having an
482 always 1 TARGET_HARD_REGNO_MODE_OK. */
483 #define MODES_TIEABLE_P(MODE1, MODE2) 1
486 /* Node: Leaf Functions */
487 /* (no definitions) */
489 /* Node: Stack Registers */
490 /* (no definitions) */
493 /* Node: Register Classes */
495 /* We need a separate register class to handle register allocation for
496 ACR, since it can't be used for post-increment.
498 It's not obvious, but having subunions of all movable-between
499 register classes does really help register allocation (pre-IRA
504 ACR_REGS
, MOF_REGS
, SRP_REGS
, CC0_REGS
,
505 MOF_SRP_REGS
, SPECIAL_REGS
,
506 SPEC_ACR_REGS
, GENNONACR_REGS
,
507 SPEC_GENNONACR_REGS
, GENERAL_REGS
,
512 #define N_REG_CLASSES (int) LIM_REG_CLASSES
514 #define REG_CLASS_NAMES \
516 "ACR_REGS", "MOF_REGS", "SRP_REGS", "CC0_REGS", \
517 "MOF_SRP_REGS", "SPECIAL_REGS", \
518 "SPEC_ACR_REGS", "GENNONACR_REGS", "SPEC_GENNONACR_REGS", \
519 "GENERAL_REGS", "ALL_REGS"}
521 #define CRIS_SPECIAL_REGS_CONTENTS \
522 ((1 << CRIS_SRP_REGNUM) | (1 << CRIS_MOF_REGNUM) | (1 << CRIS_CC0_REGNUM))
524 /* Count in the faked argument register in GENERAL_REGS. Keep out SRP. */
525 #define REG_CLASS_CONTENTS \
528 {1 << CRIS_ACR_REGNUM}, \
529 {1 << CRIS_MOF_REGNUM}, \
530 {1 << CRIS_SRP_REGNUM}, \
531 {1 << CRIS_CC0_REGNUM}, \
532 {(1 << CRIS_MOF_REGNUM) \
533 | (1 << CRIS_SRP_REGNUM)}, \
534 {CRIS_SPECIAL_REGS_CONTENTS}, \
535 {CRIS_SPECIAL_REGS_CONTENTS \
536 | (1 << CRIS_ACR_REGNUM)}, \
537 {(0xffff | (1 << CRIS_AP_REGNUM)) \
538 & ~(1 << CRIS_ACR_REGNUM)}, \
539 {(0xffff | (1 << CRIS_AP_REGNUM) \
540 | CRIS_SPECIAL_REGS_CONTENTS) \
541 & ~(1 << CRIS_ACR_REGNUM)}, \
542 {0xffff | (1 << CRIS_AP_REGNUM)}, \
543 {0xffff | (1 << CRIS_AP_REGNUM) \
544 | CRIS_SPECIAL_REGS_CONTENTS} \
547 #define REGNO_REG_CLASS(REGNO) \
548 ((REGNO) == CRIS_ACR_REGNUM ? ACR_REGS : \
549 (REGNO) == CRIS_MOF_REGNUM ? MOF_REGS : \
550 (REGNO) == CRIS_SRP_REGNUM ? SRP_REGS : \
551 (REGNO) == CRIS_CC0_REGNUM ? CC0_REGS : \
554 #define BASE_REG_CLASS GENERAL_REGS
556 #define MODE_CODE_BASE_REG_CLASS(MODE, AS, OCODE, ICODE) \
557 ((OCODE) != POST_INC ? BASE_REG_CLASS : GENNONACR_REGS)
559 #define INDEX_REG_CLASS GENERAL_REGS
561 /* Since it uses reg_renumber, it is safe only once reg_renumber
562 has been allocated, which happens in reginfo.c during register
564 #define REGNO_OK_FOR_BASE_P(REGNO) \
565 ((REGNO) <= CRIS_LAST_GENERAL_REGISTER \
566 || (REGNO) == ARG_POINTER_REGNUM \
567 || (unsigned) reg_renumber[REGNO] <= CRIS_LAST_GENERAL_REGISTER \
568 || (unsigned) reg_renumber[REGNO] == ARG_POINTER_REGNUM)
570 /* REGNO_OK_FOR_BASE_P seems to be obsolete wrt. this one, but not yet
571 documented as such. */
572 #define REGNO_MODE_CODE_OK_FOR_BASE_P(REGNO, MODE, AS, OCODE, ICODE) \
573 (REGNO_OK_FOR_BASE_P (REGNO) \
574 && ((OCODE) != POST_INC \
575 || !((REGNO) == CRIS_ACR_REGNUM \
576 || (unsigned) reg_renumber[REGNO] == CRIS_ACR_REGNUM)))
578 /* See REGNO_OK_FOR_BASE_P. */
579 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO)
581 /* We can't move special registers to and from memory in smaller than
582 word_mode. We also can't move between special registers. Luckily,
583 -1, as returned by true_regnum for non-sub/registers, is valid as a
584 parameter to our REGNO_REG_CLASS, returning GENERAL_REGS, so we get
585 the effect that any X that isn't a special-register is treated as
586 a non-empty intersection with GENERAL_REGS. */
587 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
588 ((reg_class_subset_p (CLASS, SPECIAL_REGS) \
589 && ((GET_MODE_SIZE (MODE) < 4 && MEM_P (X)) \
590 || !reg_classes_intersect_p (REGNO_REG_CLASS (true_regnum (X)), \
592 ? GENERAL_REGS : NO_REGS)
594 /* FIXME: Fix regrename.c; it should check validity of replacements,
595 not just with a silly pass-specific macro. We may miss some
596 opportunities, but we must stop regrename from creating acr++. */
597 #define HARD_REGNO_RENAME_OK(FROM, TO) ((TO) != CRIS_ACR_REGNUM)
599 /* For CRIS, this is always the size of MODE in words,
600 since all registers are the same size. To use omitted modes in
601 patterns with reload constraints, you must say the widest size
602 which is allowed for VOIDmode.
603 FIXME: Does that still apply for gcc-2.9x? Keep poisoned until such
604 patterns are added back. News: 2001-03-16: Happens as early as the
606 #define CLASS_MAX_NREGS(CLASS, MODE) \
607 ((MODE) == VOIDmode \
608 ? 1 /* + cris_fatal ("CLASS_MAX_NREGS with VOIDmode") */ \
609 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
612 /* Node: Frame Layout */
614 #define STACK_GROWS_DOWNWARD 1
615 #define FRAME_GROWS_DOWNWARD 1
617 /* It seems to be indicated in the code (at least 2.1) that this is
618 better a constant, and best 0. */
619 #define STARTING_FRAME_OFFSET 0
621 #define FIRST_PARM_OFFSET(FNDECL) 0
623 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
624 cris_return_addr_rtx (COUNT, FRAMEADDR)
626 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, CRIS_SRP_REGNUM)
628 /* FIXME: Any __builtin_eh_return callers must not return anything and
629 there must not be collisions with incoming parameters. Luckily the
630 number of __builtin_eh_return callers is limited. For now return
631 parameter registers in reverse order and hope for the best. */
632 #define EH_RETURN_DATA_REGNO(N) \
633 (IN_RANGE ((N), 0, 3) ? (CRIS_FIRST_ARG_REG + 3 - (N)) : INVALID_REGNUM)
635 /* Store the stack adjustment in the structure-return-address register. */
636 #define CRIS_STACKADJ_REG CRIS_STRUCT_VALUE_REGNUM
637 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, CRIS_STACKADJ_REG)
639 #define EH_RETURN_HANDLER_RTX \
640 cris_return_addr_rtx (0, NULL)
642 #define INIT_EXPANDERS cris_init_expanders ()
644 /* FIXME: Move this to right node (it's not documented properly yet). */
645 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (CRIS_SRP_REGNUM)
647 /* FIXME: Move this to right node (it's not documented properly yet).
648 FIXME: Check what alignment we can assume regarding
649 TARGET_STACK_ALIGN and TARGET_ALIGN_BY_32. */
650 #define DWARF_CIE_DATA_ALIGNMENT -1
652 /* If we would ever need an exact mapping between canonical register
653 number and dwarf frame register, we would either need to include all
654 registers in the gcc description (with some marked fixed of course), or
655 an inverse mapping from dwarf register to gcc register. There is one
656 need in dwarf2out.c:expand_builtin_init_dwarf_reg_sizes. Right now, I
657 don't see that we need exact correspondence between DWARF *frame*
658 registers and DBX_REGISTER_NUMBER, so map them onto GCC registers. */
659 #define DWARF_FRAME_REGNUM(REG) (REG)
661 /* Node: Stack Checking */
662 /* (no definitions) FIXME: Check. */
664 /* Node: Frame Registers */
666 #define STACK_POINTER_REGNUM CRIS_SP_REGNUM
668 /* Register used for frame pointer. This is also the last of the saved
669 registers, when a frame pointer is not used. */
670 #define FRAME_POINTER_REGNUM CRIS_FP_REGNUM
672 /* Faked register, is always eliminated. We need it to eliminate
673 allocating stack slots for the return address and the frame pointer. */
674 #define ARG_POINTER_REGNUM CRIS_AP_REGNUM
676 #define STATIC_CHAIN_REGNUM CRIS_STATIC_CHAIN_REGNUM
679 /* Node: Elimination */
681 #define ELIMINABLE_REGS \
682 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
683 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
684 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
686 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
687 (OFFSET) = cris_initial_elimination_offset (FROM, TO)
690 /* Node: Stack Arguments */
692 /* Since many parameters take up one register each in any case,
693 defining TARGET_PROMOTE_PROTOTYPES that always returns true would
694 seem like a good idea, but measurements indicate that a combination
695 using PROMOTE_MODE is better. */
697 #define ACCUMULATE_OUTGOING_ARGS 1
700 /* Node: Register Arguments */
702 /* Contrary to what you'd believe, defining FUNCTION_ARG_CALLEE_COPIES
703 seems like a (small total) loss, at least for gcc-2.7.2 compiling and
704 running gcc-2.1 (small win in size, small loss running -- 100.1%),
705 and similarly for size for products (.1 .. .3% bloat, sometimes win).
706 Due to the empirical likeliness of making slower code, it is not
709 /* This no longer *needs* to be a structure; but keeping it as such should
710 not hurt (and hacking the ABI is simpler). */
711 #define CUMULATIVE_ARGS struct cum_args
712 struct cum_args
{int regs
;};
714 /* The regs member is an integer, the number of arguments got into
716 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
719 #define FUNCTION_ARG_REGNO_P(REGNO) \
720 ((REGNO) >= CRIS_FIRST_ARG_REG \
721 && (REGNO) < CRIS_FIRST_ARG_REG + (CRIS_MAX_ARGS_IN_REGS))
724 /* Node: Aggregate Return */
726 #define CRIS_STRUCT_VALUE_REGNUM ((CRIS_FIRST_ARG_REG) - 1)
729 /* Node: Caller Saves */
730 /* (no definitions) */
732 /* Node: Function entry */
734 /* See cris.c for TARGET_ASM_FUNCTION_PROLOGUE and
735 TARGET_ASM_FUNCTION_EPILOGUE. */
737 /* Node: Profiling */
739 #define FUNCTION_PROFILER(FILE, LABELNO) \
740 error ("no FUNCTION_PROFILER for CRIS")
742 /* FIXME: Some of the undefined macros might be mandatory. If so, fix
746 /* Node: Trampolines */
748 #define TRAMPOLINE_SIZE (TARGET_V32 ? 58 : 32)
750 /* CRIS wants instructions on word-boundary. */
751 #define TRAMPOLINE_ALIGNMENT 16
753 /* Node: Library Calls */
755 /* If you change this, you have to check whatever libraries and systems
757 #define TARGET_EDOM 33
760 /* Node: Addressing Modes */
762 #define HAVE_POST_INCREMENT 1
764 #define CONSTANT_ADDRESS_P(X) \
765 (CONSTANT_P (X) && cris_legitimate_address_p (QImode, X, false))
767 /* Must be a compile-time constant, so we go with the highest value
768 among all CRIS variants. */
769 #define MAX_REGS_PER_ADDRESS 2
771 /* Fix reloads known to cause suboptimal spilling. */
772 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, INDL, WIN) \
775 if (cris_reload_address_legitimized (X, MODE, OPNUM, TYPE, INDL)) \
780 /* The mode argument to cris_legitimate_constant_p isn't used, so just
781 pass a cheap dummy. N.B. we have to cast away const from the
782 parameter rather than adjust the parameter, as it's type is mandated
783 by the TARGET_LEGITIMATE_CONSTANT_P target hook interface. */
784 #define CRIS_CONSTANT_P(X) \
785 (CONSTANT_P (X) && cris_legitimate_constant_p (VOIDmode, CONST_CAST_RTX (X)))
787 /* Node: Condition Code */
789 #define NOTICE_UPDATE_CC(EXP, INSN) cris_notice_update_cc (EXP, INSN)
791 /* FIXME: Maybe define CANONICALIZE_COMPARISON later, when playing with
792 optimizations. It is needed; currently we do this with instruction
793 patterns and NOTICE_UPDATE_CC. */
798 /* Regardless of the presence of delay slots, the default value of 1 for
799 BRANCH_COST is the best in the range (1, 2, 3), tested with gcc-2.7.2
800 with testcases ipps and gcc, giving smallest and fastest code. */
802 #define SLOW_BYTE_ACCESS 0
804 /* This is the threshold *below* which inline move sequences of
805 word-length sizes will be emitted. The "9" will translate to
806 (9 - 1) * 4 = 32 bytes maximum moved, but using 16 instructions
807 (8 instruction sequences) or less. */
808 #define MOVE_RATIO(speed) 9
813 #define TEXT_SECTION_ASM_OP "\t.text"
815 #define DATA_SECTION_ASM_OP "\t.data"
817 /* The jump table is immediately connected to the preceding insn. */
818 #define JUMP_TABLES_IN_TEXT_SECTION 1
825 enum cris_symbol_type
830 cris_got_symbol_needing_fixup
= 3,
832 cris_offsettable_symbol
= 8
835 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? CRIS_GOT_REGNUM : INVALID_REGNUM)
837 #define LEGITIMATE_PIC_OPERAND_P(X) cris_legitimate_pic_operand (X)
840 /* Node: File Framework */
842 /* We don't want an .ident for gcc. To avoid that but still support
843 #ident, we override TARGET_ASM_OUTPUT_IDENT and, since the gcc .ident
844 is its only use besides front-end .ident directives, we return if
845 the state if the cgraph is not PARSING. */
846 #undef TARGET_ASM_OUTPUT_IDENT
847 #define TARGET_ASM_OUTPUT_IDENT cris_asm_output_ident
849 #define ASM_APP_ON "#APP\n"
851 #define ASM_APP_OFF "#NO_APP\n"
854 /* Node: Data Output */
856 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) (C) == '@'
858 /* Node: Uninitialized Data */
860 /* Remember to round off odd values if we want data alignment,
861 since we cannot do that with an .align directive.
863 Using .comm causes the space not to be reserved in .bss, but by
864 tricks with the symbol type. Not good if other tools than binutils
865 are used on the object files. Since ".global ... .lcomm ..." works, we
866 use that. Use .._ALIGNED_COMMON, since gcc whines when we only have
867 ..._COMMON, and we prefer to whine ourselves; BIGGEST_ALIGNMENT is not
869 /* FIXME: I suspect a bug in gcc with alignment. Do not warn until
870 investigated; it mucks up the testsuite results. */
871 #define CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, LOCAL) \
874 int align_ = (ALIGN) / BITS_PER_UNIT; \
875 if (TARGET_DATA_ALIGN && TARGET_ALIGN_BY_32 && align_ < 4) \
877 else if (TARGET_DATA_ALIGN && align_ < 2) \
879 /* FIXME: Do we need this? */ \
880 else if (align_ < 1) \
885 fprintf ((FILE), "%s", LOCAL_ASM_OP); \
886 assemble_name ((FILE), (NAME)); \
887 fprintf ((FILE), "\n"); \
889 fprintf ((FILE), "%s", COMMON_ASM_OP); \
890 assemble_name ((FILE), (NAME)); \
891 fprintf ((FILE), ",%u,%u\n", (int)(SIZE), align_); \
895 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
896 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 0)
898 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
899 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
900 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 1)
902 /* Node: Label Output */
904 /* Globalizing directive for a label. */
905 #define GLOBAL_ASM_OP "\t.global "
907 #define SUPPORTS_WEAK 1
909 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYM) \
910 cris_asm_output_symbol_ref (STREAM, SYM)
912 #define ASM_OUTPUT_LABEL_REF(STREAM, BUF) \
913 cris_asm_output_label_ref (STREAM, BUF)
915 /* Remove any previous definition (elfos.h). */
916 #undef ASM_GENERATE_INTERNAL_LABEL
917 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
918 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long) NUM)
920 /* Node: Initialization */
921 /* (no definitions) */
923 /* Node: Macros for Initialization */
924 /* (no definitions) */
926 /* Node: Instruction Output */
928 #define REGISTER_NAMES \
929 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
930 "r9", "r10", "r11", "r12", "r13", "sp", "acr", "srp", "mof", "faked_ap", "dccr"}
932 #define ADDITIONAL_REGISTER_NAMES \
933 {{"r14", 14}, {"r15", 15}, {"pc", 15}}
935 /* Output an empty line to illustrate the presence of the delay slot. */
936 #define DBR_OUTPUT_SEQEND(FILE) \
939 #define LOCAL_LABEL_PREFIX "."
941 /* cppinit.c initializes a const array from this, so it must be constant,
942 can't have it different based on options. Luckily, the prefix is
943 always allowed, so let's have it on all GCC-generated code. Note that
944 we have this verbatim everywhere in the back-end, not using %R or %s or
946 #define REGISTER_PREFIX "$"
948 /* Remove any previous definition (elfos.h). */
949 /* We use -fno-leading-underscore to remove it, when necessary. */
950 #undef USER_LABEL_PREFIX
951 #define USER_LABEL_PREFIX "_"
953 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \
956 ? "\tsubq 4,$sp\n\tmove $%s,[$sp]\n" : "\tpush $%s\n", \
959 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \
960 fprintf (FILE, "\tmove [$sp+],$%s\n", reg_names[REGNO])
963 /* Node: Dispatch Tables */
965 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
969 asm_fprintf (FILE, "\t.word %LL%d-.\n", VALUE); \
971 asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL); \
975 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
976 asm_fprintf (FILE, "\t.dword %LL%d\n", VALUE)
978 /* Defined to also emit an .align in elfos.h. We don't want that. */
979 #undef ASM_OUTPUT_CASE_LABEL
981 /* Since the "bound" insn loads the comparison value if the compared<
982 value (register) is out of bounds (0..comparison value-1), we need
983 to output another case to catch it.
984 The way to find it is to look for the label_ref at the else-arm inside
985 the expanded casesi core-insn.
986 FIXME: Check this construct when changing to new version of gcc. */
987 #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) \
988 cris_asm_output_case_end (STREAM, NUM, TABLE)
991 /* Node: Exception Region Output */
992 /* (no definitions) */
993 /* FIXME: Fill in with our own optimized layout. */
995 /* Node: Alignment Output */
997 #define ASM_OUTPUT_ALIGN(FILE, LOG) \
998 fprintf (FILE, "\t.align %d\n", (LOG))
1001 /* Node: All Debuggers */
1003 #define DBX_REGISTER_NUMBER(REGNO) \
1004 ((REGNO) == CRIS_SRP_REGNUM ? CRIS_CANONICAL_SRP_REGNUM : \
1005 (REGNO) == CRIS_MOF_REGNUM ? CRIS_CANONICAL_MOF_REGNUM : \
1006 (REGNO) == CRIS_CC0_REGNUM ? CRIS_CANONICAL_CC0_REGNUM : \
1009 /* FIXME: Investigate DEBUGGER_AUTO_OFFSET, DEBUGGER_ARG_OFFSET. */
1012 /* Node: DBX Options */
1014 /* Is this correct? Check later. */
1015 #define DBX_NO_XREFS
1017 #define DBX_CONTIN_LENGTH 0
1019 /* FIXME: Is this needed when we have 0 DBX_CONTIN_LENGTH? */
1020 #define DBX_CONTIN_CHAR '?'
1023 /* Node: DBX Hooks */
1024 /* (no definitions) */
1026 /* Node: File names and DBX */
1027 /* (no definitions) */
1030 /* Node: SDB and DWARF */
1031 /* (no definitions) */
1035 /* A combination of the bound (umin) insn together with a
1036 sign-extended add via the table to PC seems optimal.
1037 If the table overflows, the assembler will take care of it.
1038 Theoretically, in extreme cases (uncertain if they occur), an error
1039 will be emitted, so FIXME: Check how large case-tables are emitted,
1040 possible add an option to emit SImode case-tables. */
1041 #define CASE_VECTOR_MODE HImode
1043 #define CASE_VECTOR_PC_RELATIVE 1
1045 /* FIXME: Investigate CASE_VECTOR_SHORTEN_MODE to make sure HImode is not
1046 used when broken-.word could possibly fail (plus testcase). */
1048 /* This is the number of bytes that can be moved in one
1049 reasonably fast instruction sequence. For CRIS, this is two
1050 instructions: mem => reg, reg => mem. */
1053 /* Maybe SHIFT_COUNT_TRUNCATED is safe to define? FIXME: Check later. */
1055 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1057 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
1058 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
1060 #define Pmode SImode
1062 #define FUNCTION_MODE QImode
1064 #define NO_IMPLICIT_EXTERN_C
1068 * eval: (c-set-style "gnu")
1069 * indent-tabs-mode: t