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1 709 jeremybenn
/* Definitions for GCC.  Part of the machine description for CRIS.
2
   Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008,
3
   2009, 2010, 2011 Free Software Foundation, Inc.
4
   Contributed by Axis Communications.  Written by Hans-Peter Nilsson.
5
 
6
This file is part of GCC.
7
 
8
GCC is free software; you can redistribute it and/or modify
9
it under the terms of the GNU General Public License as published by
10
the Free Software Foundation; either version 3, or (at your option)
11
any later version.
12
 
13
GCC is distributed in the hope that it will be useful,
14
but WITHOUT ANY WARRANTY; without even the implied warranty of
15
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16
GNU General Public License for more details.
17
 
18
You should have received a copy of the GNU General Public License
19
along with GCC; see the file COPYING3.  If not see
20
<http://www.gnu.org/licenses/>.  */
21
 
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.
27
 
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.  */
34
 
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.  */
39
 
40
/* We don't want to use gcc_assert for everything, as that can be
41
   compiled out.  */
42
#define CRIS_ASSERT(x) \
43
 do { if (!(x)) internal_error ("CRIS-port assertion failed: " #x); } while (0)
44
 
45
/* Replacement for REG_P since it does not match SUBREGs.  Happens for
46
   testcase Axis-20000320 with gcc-2.9x.  */
47
#define REG_S_P(x) \
48
 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (XEXP (x, 0))))
49
 
50
/* Last register in main register bank r0..r15.  */
51
#define CRIS_LAST_GENERAL_REGISTER 15
52
 
53
/* Descriptions of registers used for arguments.  */
54
#define CRIS_FIRST_ARG_REG 10
55
#define CRIS_MAX_ARGS_IN_REGS 4
56
 
57
/* See also *_REGNUM constants in cris.md.  */
58
 
59
/* Most of the time, we need the index into the register-names array.
60
   When passing debug-info, we need the real hardware register number.  */
61
#define CRIS_CANONICAL_SRP_REGNUM (16 + 11)
62
#define CRIS_CANONICAL_MOF_REGNUM (16 + 7)
63
/* We have CCR in all models including v10, but that's 16 bits, so let's
64
   prefer the DCCR number, which is a DMA pointer in pre-v8, so we'll
65
   never clash with it for GCC purposes.  */
66
#define CRIS_CANONICAL_CC0_REGNUM (16 + 13)
67
 
68
/* When generating PIC, these suffixes are added to the names of non-local
69
   functions when being output.  Contrary to other ports, we have offsets
70
   relative to the GOT, not the PC.  We might implement PC-relative PLT
71
   semantics later for the general case; they are used in some cases right
72
   now, such as MI thunks.  */
73
#define CRIS_GOTPLT_SUFFIX ":GOTPLT"
74
#define CRIS_PLT_GOTOFFSET_SUFFIX ":PLTG"
75
#define CRIS_PLT_PCOFFSET_SUFFIX ":PLT"
76
 
77
#define CRIS_FUNCTION_ARG_SIZE(MODE, TYPE)      \
78
  ((MODE) != BLKmode ? GET_MODE_SIZE (MODE)     \
79
   : (unsigned) int_size_in_bytes (TYPE))
80
 
81
/* Which CPU version this is.  The parsed and adjusted cris_cpu_str.  */
82
extern int cris_cpu_version;
83
 
84
/* Changing the order used to be necessary to put the fourth __make_dp
85
   argument (a DImode parameter) in registers, to fit with the libfunc
86
   parameter passing scheme used for intrinsic functions.  FIXME: Check
87
   performance.  */
88
#ifdef IN_LIBGCC2
89
#define __make_dp(a,b,c,d) __cris_make_dp(d,a,b,c)
90
#endif
91
 
92
 
93
/* Node: Driver */
94
 
95
/* Also provide canonical vN definitions when user specifies an alias.
96
   Note that -melf overrides -maout.  */
97
 
98
#define CPP_SPEC \
99
 "%{mtune=*:-D__tune_%* %{mtune=v*:-D__CRIS_arch_tune=%*}\
100
   %{mtune=etrax4:-D__tune_v3 -D__CRIS_arch_tune=3}\
101
   %{mtune=etrax100:-D__tune_v8 -D__CRIS_arch_tune=8}\
102
   %{mtune=svinto:-D__tune_v8 -D__CRIS_arch_tune=8}\
103
   %{mtune=etrax100lx:-D__tune_v10 -D__CRIS_arch_tune=10}\
104
   %{mtune=ng:-D__tune_v10 -D__CRIS_arch_tune=10}}\
105
  %{mcpu=*:-D__arch_%* %{mcpu=v*:-D__CRIS_arch_version=%*}\
106
   %{mcpu=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
107
   %{mcpu=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
108
   %{mcpu=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
109
   %{mcpu=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
110
   %{mcpu=ng:-D__arch_v10 -D__CRIS_arch_version=10}}\
111
  %{march=*:-D__arch_%* %{march=v*:-D__CRIS_arch_version=%*}\
112
   %{march=etrax4:-D__arch_v3 -D__CRIS_arch_version=3}\
113
   %{march=etrax100:-D__arch_v8 -D__CRIS_arch_version=8}\
114
   %{march=svinto:-D__arch_v8 -D__CRIS_arch_version=8}\
115
   %{march=etrax100lx:-D__arch_v10 -D__CRIS_arch_version=10}\
116
   %{march=ng:-D__arch_v10 -D__CRIS_arch_version=10}}\
117
  %{metrax100:-D__arch__v8 -D__CRIS_arch_version=8}\
118
  %{metrax4:-D__arch__v3 -D__CRIS_arch_version=3}\
119
  %(cpp_subtarget)"
120
 
121
/* For the cris-*-elf subtarget.  */
122
 
123
#define CRIS_DEFAULT_TUNE "10"
124
#define CRIS_ARCH_CPP_DEFAULT
125
#define CRIS_DEFAULT_ASM_ARCH_OPTION ""
126
 
127
#ifdef TARGET_CPU_DEFAULT
128
#if TARGET_CPU_DEFAULT != 32 && TARGET_CPU_DEFAULT != 10
129
 #error "Due to '()'; e.g. '#define TARGET_CPU_DEFAULT (10)', stringize TARGET_CPU_DEFAULT isn't useful: update manually."
130
#endif
131
 
132
#if TARGET_CPU_DEFAULT == 32
133
#undef CRIS_DEFAULT_TUNE
134
#define CRIS_DEFAULT_TUNE "32"
135
/* To enable use of "generic" cris-axis-elf binutils, always pass the
136
   architecture option to GAS.  (We don't do this for non-v32.)  */
137
#undef CRIS_DEFAULT_ASM_ARCH_OPTION
138
#define CRIS_DEFAULT_ASM_ARCH_OPTION "--march=v32"
139
#endif
140
 
141
#undef CRIS_ARCH_CPP_DEFAULT
142
#define CRIS_ARCH_CPP_DEFAULT \
143
 "%{!march=*:\
144
   %{!metrax*:\
145
    %{!mcpu=*:\
146
     %{!mtune=*:-D__tune_v" CRIS_DEFAULT_TUNE "}\
147
     -D__arch_v"CRIS_DEFAULT_TUNE\
148
   " -D__CRIS_arch_version=" CRIS_DEFAULT_TUNE "}}}"
149
#endif
150
 
151
#define CRIS_CPP_SUBTARGET_SPEC \
152
 "%{mbest-lib-options:\
153
   %{!moverride-best-lib-options:\
154
   %{!march=*:%{!metrax*:%{!mcpu=*:\
155
      -D__tune_v" CRIS_DEFAULT_TUNE \
156
    " -D__CRIS_arch_tune=" CRIS_DEFAULT_TUNE "}}}}}"\
157
 CRIS_ARCH_CPP_DEFAULT
158
 
159
/* Override previous definitions (linux.h).  */
160
#undef CC1_SPEC
161
#define CC1_SPEC \
162
 "%{metrax4:-march=v3}\
163
  %{metrax100:-march=v8}\
164
  %(cc1_subtarget)"
165
 
166
/* For the cris-*-elf subtarget.  */
167
#define CRIS_CC1_SUBTARGET_SPEC \
168
 "-melf\
169
  %{mbest-lib-options:\
170
   %{!moverride-best-lib-options:\
171
   %{!march=*:%{!mcpu=*:-mtune=v" CRIS_DEFAULT_TUNE\
172
       " -D__CRIS_arch_tune=" CRIS_DEFAULT_TUNE "}}\
173
    %{!finhibit-size-directive:\
174
      %{!fno-function-sections: -ffunction-sections}\
175
      %{!fno-data-sections: -fdata-sections}}}}"
176
 
177
/* This adds to CC1_SPEC.  */
178
#define CC1PLUS_SPEC ""
179
 
180
#ifdef HAVE_AS_NO_MUL_BUG_ABORT_OPTION
181
#define MAYBE_AS_NO_MUL_BUG_ABORT \
182
 "%{mno-mul-bug-workaround:-no-mul-bug-abort} "
183
#else
184
#define MAYBE_AS_NO_MUL_BUG_ABORT
185
#endif
186
 
187
/* Override previous definitions (linux.h).  */
188
#undef ASM_SPEC
189
#define ASM_SPEC \
190
 MAYBE_AS_NO_MUL_BUG_ABORT \
191
 "%(asm_subtarget)\
192
 %{march=*:%{mcpu=*:%edo not specify both -march=... and -mcpu=...}}\
193
 %{march=v32:--march=v32} %{mcpu=v32:--march=v32}"
194
 
195
/* For the cris-*-elf subtarget.  */
196
#define CRIS_ASM_SUBTARGET_SPEC \
197
 "--em=criself %{!march=*:%{!mcpu=*:" CRIS_DEFAULT_ASM_ARCH_OPTION "}}"
198
 
199
/* FIXME: We should propagate the -melf option to make the criself
200
   "emulation" unless a linker script is provided (-T*), but I don't know
201
   how to do that if either of -Ttext, -Tdata or -Tbss is given but no
202
   linker script, as is usually the case.  Leave it to the user for the
203
   time being.
204
 
205
   Note that -melf overrides -maout except that a.out-compiled libraries
206
   are linked in (multilibbing).  We'd need some %s-variant that
207
   checked for existence of some specific file.  */
208
#undef LINK_SPEC
209
#define LINK_SPEC \
210
 "%{v:--verbose}\
211
  %(link_subtarget)"
212
 
213
/* For the cris-*-elf subtarget.  */
214
#define CRIS_LINK_SUBTARGET_SPEC \
215
 "-mcriself\
216
  %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\
217
  %{!r:%{O2|O3: --gc-sections}}"
218
 
219
/* Which library to get.  The simulator uses a different library for
220
   the low-level syscalls (implementing the Linux syscall ABI instead
221
   of direct-iron accesses).  Default everything with the stub "nosys"
222
   library.  */
223
/* Override previous definitions (linux.h).  */
224
#undef LIB_SPEC
225
#define LIB_SPEC \
226
 "%{sim*:--start-group -lc -lsyslinux --end-group}\
227
  %{!sim*:%{g*:-lg}\
228
    %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\
229
  -lnosys"
230
 
231
/* Linker startfile options; crt0 flavors.
232
   We need to remove any previous definition (elfos.h).  */
233
#undef STARTFILE_SPEC
234
#define STARTFILE_SPEC \
235
 "%{sim*:crt1.o%s}%{!sim*:crt0.o%s}\
236
  crti.o%s crtbegin.o%s"
237
 
238
#undef ENDFILE_SPEC
239
#define ENDFILE_SPEC "crtend.o%s crtn.o%s"
240
 
241
#define EXTRA_SPECS                             \
242
  {"cpp_subtarget", CRIS_CPP_SUBTARGET_SPEC},   \
243
  {"cc1_subtarget", CRIS_CC1_SUBTARGET_SPEC},   \
244
  {"asm_subtarget", CRIS_ASM_SUBTARGET_SPEC},   \
245
  {"link_subtarget", CRIS_LINK_SUBTARGET_SPEC}, \
246
  CRIS_SUBTARGET_EXTRA_SPECS
247
 
248
#define CRIS_SUBTARGET_EXTRA_SPECS
249
 
250
 
251
/* Node: Run-time Target */
252
 
253
#define TARGET_CPU_CPP_BUILTINS()               \
254
  do                                            \
255
    {                                           \
256
      builtin_define_std ("cris");              \
257
      builtin_define_std ("CRIS");              \
258
      builtin_define_std ("GNU_CRIS");          \
259
      builtin_define ("__CRIS_ABI_version=2");  \
260
      builtin_assert ("cpu=cris");              \
261
      builtin_assert ("machine=cris");          \
262
    }                                           \
263
  while (0)
264
 
265
/* Previously controlled by target_flags.  */
266
#define TARGET_ELF 1
267
 
268
/* Previously controlled by target_flags.  Note that this is *not* set
269
   for -melinux.  */
270
#define TARGET_LINUX 0
271
 
272
/* For the cris-*-elf subtarget.  */
273
#define CRIS_SUBTARGET_DEFAULT 0
274
 
275
#define CRIS_CPU_BASE 0
276
#define CRIS_CPU_ETRAX4 3       /* Just lz added.  */
277
#define CRIS_CPU_SVINTO 8       /* Added swap, jsrc & Co., 32-bit accesses.  */
278
#define CRIS_CPU_NG 10          /* Added mul[su].  */
279
#define CRIS_CPU_V32 32         /* Major changes.  */
280
 
281
#ifndef TARGET_CPU_DEFAULT
282
#define TARGET_CPU_DEFAULT CRIS_CPU_BASE
283
#endif
284
 
285
/* Default target_flags if no switches specified.  */
286
#ifndef TARGET_DEFAULT
287
# if TARGET_CPU_DEFAULT == 32
288
#  define TARGET_DEFAULT \
289
 (MASK_STACK_ALIGN \
290
  + MASK_CONST_ALIGN + MASK_DATA_ALIGN \
291
  + MASK_PROLOGUE_EPILOGUE)
292
# else  /* 10 */
293
# define TARGET_DEFAULT \
294
 (MASK_SIDE_EFFECT_PREFIXES + MASK_STACK_ALIGN \
295
  + MASK_CONST_ALIGN + MASK_DATA_ALIGN \
296
  + MASK_PROLOGUE_EPILOGUE + MASK_MUL_BUG)
297
# endif
298
#endif
299
 
300
/* Local, providing a default for cris_cpu_version.  */
301
#define CRIS_DEFAULT_CPU_VERSION TARGET_CPU_DEFAULT
302
 
303
#define TARGET_HAS_MUL_INSNS (cris_cpu_version >= CRIS_CPU_NG)
304
#define TARGET_HAS_LZ (cris_cpu_version >= CRIS_CPU_ETRAX4)
305
#define TARGET_HAS_SWAP (cris_cpu_version >= CRIS_CPU_SVINTO)
306
#define TARGET_V32 (cris_cpu_version >= CRIS_CPU_V32)
307
 
308
/* Node: Storage Layout */
309
 
310
#define BITS_BIG_ENDIAN 0
311
 
312
#define BYTES_BIG_ENDIAN 0
313
 
314
/* WORDS_BIG_ENDIAN is not defined in the hardware, but for consistency,
315
   we use little-endianness, and we may also be able to use
316
   post-increment on DImode indirect.  */
317
#define WORDS_BIG_ENDIAN 0
318
 
319
#define UNITS_PER_WORD 4
320
 
321
#define CRIS_PROMOTED_MODE(MODE, UNSIGNEDP, TYPE) \
322
 (GET_MODE_CLASS (MODE) == MODE_INT && GET_MODE_SIZE (MODE) < 4) \
323
  ? SImode : MODE
324
 
325
/* We will be using prototype promotion, so they will be 32 bit.  */
326
#define PARM_BOUNDARY 32
327
 
328
/* Stack boundary is guided by -mstack-align, -mno-stack-align,
329
   -malign.
330
   Old comment: (2.1: still valid in 2.7.2?)
331
    Note that to make this macro affect the alignment of stack
332
   locals, a fix was required, and special precautions when handling
333
   the stack pointer in various other macros (TARGET_ASM_FUNCTION_PROLOGUE
334
   et al) were required.  See file "function.c".  If you would just define
335
   this macro, it would only affect the builtin alloca and variable
336
   local data (non-ANSI, non-K&R, Gnu C extension).  */
337
#define STACK_BOUNDARY \
338
 (TARGET_STACK_ALIGN ? (TARGET_ALIGN_BY_32 ? 32 : 16) : 8)
339
 
340
#define FUNCTION_BOUNDARY 16
341
 
342
/* Do not change BIGGEST_ALIGNMENT (when optimizing), as it will affect
343
   strange places, at least in 2.1.  */
344
#define BIGGEST_ALIGNMENT 8
345
 
346
/* If -m16bit,  -m16-bit, -malign or -mdata-align,
347
   align everything to 16 bit.  */
348
#define DATA_ALIGNMENT(TYPE, BASIC_ALIGN)                       \
349
 (TARGET_DATA_ALIGN                                             \
350
  ? (TARGET_ALIGN_BY_32                                         \
351
     ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN)                    \
352
     : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
353
 
354
/* Note that CONSTANT_ALIGNMENT has the effect of making gcc believe that
355
   ALL references to constant stuff (in code segment, like strings) has
356
   this alignment.  That is a rather rushed assumption.  Luckily we do not
357
   care about the "alignment" operand to builtin memcpy (only place where
358
   it counts), so it doesn't affect any bad spots.  */
359
#define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN)               \
360
 (TARGET_CONST_ALIGN                                            \
361
  ? (TARGET_ALIGN_BY_32                                         \
362
     ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN)                    \
363
     : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN)
364
 
365
/* FIXME: Define LOCAL_ALIGNMENT for word and dword or arrays and
366
   structures (if -mstack-align=), and check that it is good.  */
367
 
368
#define EMPTY_FIELD_BOUNDARY 8
369
 
370
#define STRUCTURE_SIZE_BOUNDARY 8
371
 
372
#define STRICT_ALIGNMENT 0
373
 
374
/* Remove any previous definition (elfos.h).
375
   ??? If it wasn't for all the other stuff that affects layout of
376
   structures and bit-fields, this could presumably cause incompatibility
377
   with other GNU/Linux ports (i.e. elfos.h users).  */
378
#undef PCC_BITFIELD_TYPE_MATTERS
379
 
380
/* This is only used for non-scalars.  Strange stuff happens to structs
381
   (FIXME: What?) if we use anything larger than largest actually used
382
   datum size, so lets make it 32.  The type "long long" will still work
383
   as usual.  We can still have DImode insns, but they will only be used
384
   for scalar data (i.e. long long).  */
385
#define MAX_FIXED_MODE_SIZE 32
386
 
387
 
388
/* Node: Type Layout */
389
 
390
/* Note that DOUBLE_TYPE_SIZE is not defined anymore, since the default
391
   value gives a 64-bit double, which is what we now use.  */
392
 
393
/* For compatibility and historical reasons, a char should be signed.  */
394
#define DEFAULT_SIGNED_CHAR 1
395
 
396
/* Note that WCHAR_TYPE_SIZE is used in cexp.y,
397
   where TARGET_SHORT is not available.  */
398
#undef WCHAR_TYPE
399
#define WCHAR_TYPE "long int"
400
 
401
#undef WCHAR_TYPE_SIZE
402
#define WCHAR_TYPE_SIZE 32
403
 
404
 
405
/* Node: Register Basics */
406
 
407
/*  We count all 16 non-special registers, SRP, a faked argument
408
    pointer register, MOF and CCR/DCCR.  */
409
#define FIRST_PSEUDO_REGISTER (16 + 1 + 1 + 1 + 1)
410
 
411
/* For CRIS, these are r15 (pc) and r14 (sp). Register r8 is used as a
412
   frame-pointer, but is not fixed.  SRP is not included in general
413
   registers and will not be used automatically.  All other special
414
   registers are fixed at the moment.  The faked argument pointer register
415
   is fixed too.  */
416
#define FIXED_REGISTERS \
417
 {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1}
418
 
419
/* Register r9 is used for structure-address, r10-r13 for parameters,
420
   r10- for return values.  */
421
#define CALL_USED_REGISTERS \
422
 {0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1}
423
 
424
/* Node: Allocation Order */
425
 
426
/* We need this on CRIS, because call-used regs should be used first,
427
   (so we don't need to push).  Else start using registers from r0 and up.
428
    This preference is mainly because if we put call-used-regs from r0
429
   and up, then we can't use movem to push the rest, (which have to be
430
   saved if we use them, and movem has to start with r0).
431
   Change here if you change which registers to use as call registers.
432
 
433
   The actual need to explicitly prefer call-used registers improved the
434
   situation a lot for 2.1, but might not actually be needed anymore.
435
   Still, this order reflects what GCC should find out by itself, so it
436
   probably does not hurt.
437
 
438
   Order of preference: Call-used-regs first, then r0 and up, last fp &
439
   sp & pc as fillers.
440
   Call-used regs in opposite order, so they will cause less conflict if
441
   a function has few args (<= 3) and it wants a scratch reg.
442
    Use struct-return address first, since very few functions use
443
   structure return values so it is likely to be available.  */
444
#define REG_ALLOC_ORDER \
445
 {9, 13, 12, 11, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 14, 15, 17, 16, 18, 19}
446
 
447
/* Use MOF and ACR.  Prefer ACR before any other register.  Prefer MOF
448
   then SRP after saved registers.  The *after* is because they're only
449
   useful for storage, not for things being computed, which is
450
   apparently more common.  */
451
#define REG_ALLOC_ORDER_V32 \
452
 {15, 9, 13, 12, 11, 10, 0, 1, 2, 3, 4, 5, 6, 7, 8, 17, 16, 14, 18, 19}
453
 
454
 
455
/* Node: Values in Registers */
456
 
457
/* The VOIDmode test is so we can omit mode on anonymous insns.  FIXME:
458
   Still needed in 2.9x, at least for Axis-20000319.  */
459
#define HARD_REGNO_NREGS(REGNO, MODE)   \
460
 (MODE == VOIDmode \
461
  ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
462
 
463
/* CRIS permits all registers to hold all modes.  Well, except for the
464
   condition-code register.  And we can't hold larger-than-register size
465
   modes in the last special register that can hold a full 32 bits.  */
466
#define HARD_REGNO_MODE_OK(REGNO, MODE)         \
467
 (((MODE) == CCmode                             \
468
   || (REGNO) != CRIS_CC0_REGNUM)               \
469
  && (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD    \
470
      || ((REGNO) != CRIS_MOF_REGNUM && (REGNO) != CRIS_ACR_REGNUM)))
471
 
472
/* Because CCmode isn't covered by the "narrower mode" statement in
473
   tm.texi, we can still say all modes are tieable despite not having an
474
   always 1 HARD_REGNO_MODE_OK.  */
475
#define MODES_TIEABLE_P(MODE1, MODE2) 1
476
 
477
 
478
/* Node: Leaf Functions */
479
/* (no definitions) */
480
 
481
/* Node: Stack Registers */
482
/* (no definitions) */
483
 
484
 
485
/* Node: Register Classes */
486
 
487
/* We need a separate register class to handle register allocation for
488
   ACR, since it can't be used for post-increment.
489
 
490
   It's not obvious, but having subunions of all movable-between
491
   register classes does really help register allocation (pre-IRA
492
   comment).  */
493
enum reg_class
494
  {
495
    NO_REGS,
496
    ACR_REGS, MOF_REGS, SRP_REGS, CC0_REGS,
497
    MOF_SRP_REGS, SPECIAL_REGS,
498
    SPEC_ACR_REGS, GENNONACR_REGS,
499
    SPEC_GENNONACR_REGS, GENERAL_REGS,
500
    ALL_REGS,
501
    LIM_REG_CLASSES
502
  };
503
 
504
#define N_REG_CLASSES (int) LIM_REG_CLASSES
505
 
506
#define REG_CLASS_NAMES                                         \
507
  {"NO_REGS",                                                   \
508
   "ACR_REGS", "MOF_REGS", "SRP_REGS", "CC0_REGS",              \
509
   "MOF_SRP_REGS", "SPECIAL_REGS",                              \
510
   "SPEC_ACR_REGS", "GENNONACR_REGS", "SPEC_GENNONACR_REGS",    \
511
   "GENERAL_REGS", "ALL_REGS"}
512
 
513
#define CRIS_SPECIAL_REGS_CONTENTS                                      \
514
 ((1 << CRIS_SRP_REGNUM) | (1 << CRIS_MOF_REGNUM) | (1 << CRIS_CC0_REGNUM))
515
 
516
/* Count in the faked argument register in GENERAL_REGS.  Keep out SRP.  */
517
#define REG_CLASS_CONTENTS                      \
518
  {                                             \
519
   {0},                                          \
520
   {1 << CRIS_ACR_REGNUM},                      \
521
   {1 << CRIS_MOF_REGNUM},                      \
522
   {1 << CRIS_SRP_REGNUM},                      \
523
   {1 << CRIS_CC0_REGNUM},                      \
524
   {(1 << CRIS_MOF_REGNUM)                      \
525
    | (1 << CRIS_SRP_REGNUM)},                  \
526
   {CRIS_SPECIAL_REGS_CONTENTS},                \
527
   {CRIS_SPECIAL_REGS_CONTENTS                  \
528
    | (1 << CRIS_ACR_REGNUM)},                  \
529
   {(0xffff | (1 << CRIS_AP_REGNUM))            \
530
    & ~(1 << CRIS_ACR_REGNUM)},                 \
531
   {(0xffff | (1 << CRIS_AP_REGNUM)             \
532
    | CRIS_SPECIAL_REGS_CONTENTS)               \
533
    & ~(1 << CRIS_ACR_REGNUM)},                 \
534
   {0xffff | (1 << CRIS_AP_REGNUM)},            \
535
   {0xffff | (1 << CRIS_AP_REGNUM)              \
536
    | CRIS_SPECIAL_REGS_CONTENTS}               \
537
  }
538
 
539
#define REGNO_REG_CLASS(REGNO)                  \
540
  ((REGNO) == CRIS_ACR_REGNUM ? ACR_REGS :      \
541
   (REGNO) == CRIS_MOF_REGNUM ? MOF_REGS :      \
542
   (REGNO) == CRIS_SRP_REGNUM ? SRP_REGS :      \
543
   (REGNO) == CRIS_CC0_REGNUM ? CC0_REGS :      \
544
   GENERAL_REGS)
545
 
546
#define BASE_REG_CLASS GENERAL_REGS
547
 
548
#define MODE_CODE_BASE_REG_CLASS(MODE, AS, OCODE, ICODE)        \
549
  ((OCODE) != POST_INC ? BASE_REG_CLASS : GENNONACR_REGS)
550
 
551
#define INDEX_REG_CLASS GENERAL_REGS
552
 
553
/* Since it uses reg_renumber, it is safe only once reg_renumber
554
   has been allocated, which happens in local-alloc.c.  */
555
#define REGNO_OK_FOR_BASE_P(REGNO)                                      \
556
 ((REGNO) <= CRIS_LAST_GENERAL_REGISTER                                 \
557
  || (REGNO) == ARG_POINTER_REGNUM                                      \
558
  || (unsigned) reg_renumber[REGNO] <= CRIS_LAST_GENERAL_REGISTER       \
559
  || (unsigned) reg_renumber[REGNO] == ARG_POINTER_REGNUM)
560
 
561
/* REGNO_OK_FOR_BASE_P seems to be obsolete wrt. this one, but not yet
562
   documented as such.  */
563
#define REGNO_MODE_CODE_OK_FOR_BASE_P(REGNO, MODE, AS, OCODE, ICODE)    \
564
 (REGNO_OK_FOR_BASE_P (REGNO)                                           \
565
  && ((OCODE) != POST_INC                                               \
566
      || !((REGNO) == CRIS_ACR_REGNUM                                   \
567
           || (unsigned) reg_renumber[REGNO] == CRIS_ACR_REGNUM)))
568
 
569
/* See REGNO_OK_FOR_BASE_P.  */
570
#define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO)
571
 
572
/* We can't move special registers to and from memory in smaller than
573
   word_mode.  We also can't move between special registers.  Luckily,
574
   -1, as returned by true_regnum for non-sub/registers, is valid as a
575
   parameter to our REGNO_REG_CLASS, returning GENERAL_REGS, so we get
576
   the effect that any X that isn't a special-register is treated as
577
   a non-empty intersection with GENERAL_REGS.  */
578
#define SECONDARY_RELOAD_CLASS(CLASS, MODE, X)                          \
579
 ((reg_class_subset_p (CLASS, SPECIAL_REGS)                             \
580
   && ((GET_MODE_SIZE (MODE) < 4 && MEM_P (X))                          \
581
       || !reg_classes_intersect_p (REGNO_REG_CLASS (true_regnum (X)),  \
582
                                    GENERAL_REGS)))                     \
583
   ? GENERAL_REGS : NO_REGS)
584
 
585
/* FIXME: Fix regrename.c; it should check validity of replacements,
586
   not just with a silly pass-specific macro.  We may miss some
587
   opportunities, but we must stop regrename from creating acr++.  */
588
#define HARD_REGNO_RENAME_OK(FROM, TO) ((TO) != CRIS_ACR_REGNUM)
589
 
590
/* For CRIS, this is always the size of MODE in words,
591
   since all registers are the same size.  To use omitted modes in
592
   patterns with reload constraints, you must say the widest size
593
   which is allowed for VOIDmode.
594
   FIXME:  Does that still apply for gcc-2.9x?  Keep poisoned until such
595
   patterns are added back.  News: 2001-03-16: Happens as early as the
596
   underscore-test.  */
597
#define CLASS_MAX_NREGS(CLASS, MODE)                                    \
598
 ((MODE) == VOIDmode                                                    \
599
  ? 1 /* + cris_fatal ("CLASS_MAX_NREGS with VOIDmode") */              \
600
  : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD))
601
 
602
 
603
/* Node: Frame Layout */
604
 
605
#define STACK_GROWS_DOWNWARD
606
#define FRAME_GROWS_DOWNWARD 1
607
 
608
/* It seems to be indicated in the code (at least 2.1) that this is
609
   better a constant, and best 0.  */
610
#define STARTING_FRAME_OFFSET 0
611
 
612
#define FIRST_PARM_OFFSET(FNDECL) 0
613
 
614
#define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
615
 cris_return_addr_rtx (COUNT, FRAMEADDR)
616
 
617
#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, CRIS_SRP_REGNUM)
618
 
619
/* FIXME: Any __builtin_eh_return callers must not return anything and
620
   there must not be collisions with incoming parameters.  Luckily the
621
   number of __builtin_eh_return callers is limited.  For now return
622
   parameter registers in reverse order and hope for the best.  */
623
#define EH_RETURN_DATA_REGNO(N) \
624
  (IN_RANGE ((N), 0, 3) ? (CRIS_FIRST_ARG_REG + 3 - (N)) : INVALID_REGNUM)
625
 
626
/* Store the stack adjustment in the structure-return-address register.  */
627
#define CRIS_STACKADJ_REG CRIS_STRUCT_VALUE_REGNUM
628
#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, CRIS_STACKADJ_REG)
629
 
630
#define EH_RETURN_HANDLER_RTX \
631
  cris_return_addr_rtx (0, NULL)
632
 
633
#define INIT_EXPANDERS cris_init_expanders ()
634
 
635
/* FIXME: Move this to right node (it's not documented properly yet).  */
636
#define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (CRIS_SRP_REGNUM)
637
 
638
/* FIXME: Move this to right node (it's not documented properly yet).
639
   FIXME: Check what alignment we can assume regarding
640
   TARGET_STACK_ALIGN and TARGET_ALIGN_BY_32.  */
641
#define DWARF_CIE_DATA_ALIGNMENT -1
642
 
643
/* If we would ever need an exact mapping between canonical register
644
   number and dwarf frame register, we would either need to include all
645
   registers in the gcc description (with some marked fixed of course), or
646
   an inverse mapping from dwarf register to gcc register.  There is one
647
   need in dwarf2out.c:expand_builtin_init_dwarf_reg_sizes.  Right now, I
648
   don't see that we need exact correspondence between DWARF *frame*
649
   registers and DBX_REGISTER_NUMBER, so map them onto GCC registers.  */
650
#define DWARF_FRAME_REGNUM(REG) (REG)
651
 
652
/* Node: Stack Checking */
653
/* (no definitions) FIXME: Check.  */
654
 
655
/* Node: Frame Registers */
656
 
657
#define STACK_POINTER_REGNUM CRIS_SP_REGNUM
658
 
659
/* Register used for frame pointer.  This is also the last of the saved
660
   registers, when a frame pointer is not used.  */
661
#define FRAME_POINTER_REGNUM CRIS_FP_REGNUM
662
 
663
/* Faked register, is always eliminated.  We need it to eliminate
664
   allocating stack slots for the return address and the frame pointer.  */
665
#define ARG_POINTER_REGNUM CRIS_AP_REGNUM
666
 
667
#define STATIC_CHAIN_REGNUM CRIS_STATIC_CHAIN_REGNUM
668
 
669
 
670
/* Node: Elimination */
671
 
672
#define ELIMINABLE_REGS                         \
673
 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM},   \
674
  {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM},   \
675
  {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
676
 
677
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
678
 (OFFSET) = cris_initial_elimination_offset (FROM, TO)
679
 
680
 
681
/* Node: Stack Arguments */
682
 
683
/* Since many parameters take up one register each in any case,
684
   defining TARGET_PROMOTE_PROTOTYPES that always returns true would
685
   seem like a good idea, but measurements indicate that a combination
686
   using PROMOTE_MODE is better.  */
687
 
688
#define ACCUMULATE_OUTGOING_ARGS 1
689
 
690
 
691
/* Node: Register Arguments */
692
 
693
/* Contrary to what you'd believe, defining FUNCTION_ARG_CALLEE_COPIES
694
   seems like a (small total) loss, at least for gcc-2.7.2 compiling and
695
   running gcc-2.1 (small win in size, small loss running -- 100.1%),
696
   and similarly for size for products (.1 .. .3% bloat, sometimes win).
697
   Due to the empirical likeliness of making slower code, it is not
698
   defined.  */
699
 
700
/* This no longer *needs* to be a structure; but keeping it as such should
701
   not hurt (and hacking the ABI is simpler).  */
702
#define CUMULATIVE_ARGS struct cum_args
703
struct cum_args {int regs;};
704
 
705
/* The regs member is an integer, the number of arguments got into
706
   registers so far.  */
707
#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
708
 ((CUM).regs = 0)
709
 
710
#define FUNCTION_ARG_REGNO_P(REGNO)                     \
711
 ((REGNO) >= CRIS_FIRST_ARG_REG                         \
712
  && (REGNO) < CRIS_FIRST_ARG_REG + (CRIS_MAX_ARGS_IN_REGS))
713
 
714
 
715
/* Node: Aggregate Return */
716
 
717
#define CRIS_STRUCT_VALUE_REGNUM ((CRIS_FIRST_ARG_REG) - 1)
718
 
719
 
720
/* Node: Caller Saves */
721
/* (no definitions) */
722
 
723
/* Node: Function entry */
724
 
725
/* See cris.c for TARGET_ASM_FUNCTION_PROLOGUE and
726
   TARGET_ASM_FUNCTION_EPILOGUE.  */
727
 
728
/* Node: Profiling */
729
 
730
#define FUNCTION_PROFILER(FILE, LABELNO)  \
731
 error ("no FUNCTION_PROFILER for CRIS")
732
 
733
/* FIXME: Some of the undefined macros might be mandatory.  If so, fix
734
   documentation.  */
735
 
736
 
737
/* Node: Trampolines */
738
 
739
#define TRAMPOLINE_SIZE (TARGET_V32 ? 58 : 32)
740
 
741
/* CRIS wants instructions on word-boundary.  */
742
#define TRAMPOLINE_ALIGNMENT 16
743
 
744
/* Node: Library Calls */
745
 
746
/* If you change this, you have to check whatever libraries and systems
747
   that use it.  */
748
#define TARGET_EDOM 33
749
 
750
 
751
/* Node: Addressing Modes */
752
 
753
#define HAVE_POST_INCREMENT 1
754
 
755
/* Must be a compile-time constant, so we go with the highest value
756
   among all CRIS variants.  */
757
#define MAX_REGS_PER_ADDRESS 2
758
 
759
/* Fix reloads known to cause suboptimal spilling.  */
760
#define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, INDL, WIN)      \
761
  do                                                                    \
762
    {                                                                   \
763
      if (cris_reload_address_legitimized (X, MODE, OPNUM, TYPE, INDL)) \
764
        goto WIN;                                                       \
765
    }                                                                   \
766
  while (0)
767
 
768
 
769
/* Node: Condition Code */
770
 
771
#define NOTICE_UPDATE_CC(EXP, INSN) cris_notice_update_cc (EXP, INSN)
772
 
773
/* FIXME: Maybe define CANONICALIZE_COMPARISON later, when playing with
774
   optimizations.  It is needed; currently we do this with instruction
775
   patterns and NOTICE_UPDATE_CC.  */
776
 
777
 
778
/* Node: Costs */
779
 
780
/* Regardless of the presence of delay slots, the default value of 1 for
781
   BRANCH_COST is the best in the range (1, 2, 3), tested with gcc-2.7.2
782
   with testcases ipps and gcc, giving smallest and fastest code.  */
783
 
784
#define SLOW_BYTE_ACCESS 0
785
 
786
/* This is the threshold *below* which inline move sequences of
787
   word-length sizes will be emitted.  The "9" will translate to
788
   (9 - 1) * 4 = 32 bytes maximum moved, but using 16 instructions
789
   (8 instruction sequences) or less.  */
790
#define MOVE_RATIO(speed) 9
791
 
792
 
793
/* Node: Sections */
794
 
795
#define TEXT_SECTION_ASM_OP "\t.text"
796
 
797
#define DATA_SECTION_ASM_OP "\t.data"
798
 
799
#define FORCE_EH_FRAME_INFO_IN_DATA_SECTION (! TARGET_ELF)
800
 
801
/* The jump table is immediately connected to the preceding insn.  */
802
#define JUMP_TABLES_IN_TEXT_SECTION 1
803
 
804
 
805
/* Node: PIC */
806
 
807
/* Helper type.  */
808
 
809
enum cris_pic_symbol_type
810
  {
811
    cris_no_symbol = 0,
812
    cris_got_symbol = 1,
813
    cris_rel_symbol = 2,
814
    cris_got_symbol_needing_fixup = 3,
815
    cris_invalid_pic_symbol = 4
816
  };
817
 
818
#define PIC_OFFSET_TABLE_REGNUM (flag_pic ? CRIS_GOT_REGNUM : INVALID_REGNUM)
819
 
820
#define LEGITIMATE_PIC_OPERAND_P(X) cris_legitimate_pic_operand (X)
821
 
822
 
823
/* Node: File Framework */
824
 
825
/* We don't want an .ident for gcc.  To avoid that but still support
826
   #ident, we override ASM_OUTPUT_IDENT and, since the gcc .ident is its
827
   only use besides ASM_OUTPUT_IDENT, undef IDENT_ASM_OP from elfos.h.  */
828
#undef IDENT_ASM_OP
829
#undef ASM_OUTPUT_IDENT
830
#define ASM_OUTPUT_IDENT(FILE, NAME) \
831
  fprintf (FILE, "%s\"%s\"\n", "\t.ident\t", NAME);
832
 
833
#define ASM_APP_ON "#APP\n"
834
 
835
#define ASM_APP_OFF "#NO_APP\n"
836
 
837
 
838
/* Node: Data Output */
839
 
840
#define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) (C) == '@'
841
 
842
/* Node: Uninitialized Data */
843
 
844
/* Remember to round off odd values if we want data alignment,
845
   since we cannot do that with an .align directive.
846
 
847
   Using .comm causes the space not to be reserved in .bss, but by
848
   tricks with the symbol type.  Not good if other tools than binutils
849
   are used on the object files.  Since ".global ... .lcomm ..." works, we
850
   use that.  Use .._ALIGNED_COMMON, since gcc whines when we only have
851
   ..._COMMON, and we prefer to whine ourselves; BIGGEST_ALIGNMENT is not
852
   the one to check.  This done for a.out only.  */
853
/* FIXME: I suspect a bug in gcc with alignment.  Do not warn until
854
   investigated; it mucks up the testsuite results.  */
855
#define CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, LOCAL) \
856
  do                                                                    \
857
    {                                                                   \
858
      int align_ = (ALIGN) / BITS_PER_UNIT;                             \
859
      if (TARGET_DATA_ALIGN && TARGET_ALIGN_BY_32 && align_ < 4)        \
860
        align_ = 4;                                                     \
861
      else if (TARGET_DATA_ALIGN && align_ < 2)                         \
862
        align_ = 2;                                                     \
863
      /* FIXME: Do we need this?  */                                    \
864
      else if (align_ < 1)                                              \
865
        align_ = 1;                                                     \
866
                                                                        \
867
      if (TARGET_ELF)                                                   \
868
        {                                                               \
869
          if (LOCAL)                                                    \
870
            {                                                           \
871
              fprintf ((FILE), "%s", LOCAL_ASM_OP);                     \
872
              assemble_name ((FILE), (NAME));                           \
873
              fprintf ((FILE), "\n");                                   \
874
            }                                                           \
875
          fprintf ((FILE), "%s", COMMON_ASM_OP);                        \
876
          assemble_name ((FILE), (NAME));                               \
877
          fprintf ((FILE), ",%u,%u\n", (int)(SIZE), align_);            \
878
        }                                                               \
879
      else                                                              \
880
        {                                                               \
881
          /* We can't tell a one-only or weak COMM from a "global       \
882
             COMM" so just make all non-locals weak.  */                \
883
          if (! (LOCAL))                                                \
884
            ASM_WEAKEN_LABEL (FILE, NAME);                              \
885
          fputs ("\t.lcomm ", (FILE));                                  \
886
          assemble_name ((FILE), (NAME));                               \
887
          fprintf ((FILE), ",%u\n",                                     \
888
                   ((int)(SIZE) + (align_ - 1)) & ~(align_ - 1));       \
889
        }                                                               \
890
    }                                                                   \
891
  while (0)
892
 
893
#define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \
894
 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 0)
895
 
896
#undef ASM_OUTPUT_ALIGNED_DECL_LOCAL
897
#define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
898
 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 1)
899
 
900
/* Node: Label Output */
901
 
902
/* Globalizing directive for a label.  */
903
#define GLOBAL_ASM_OP "\t.global "
904
 
905
#define SUPPORTS_WEAK 1
906
 
907
#define ASM_OUTPUT_SYMBOL_REF(STREAM, SYM) \
908
 cris_asm_output_symbol_ref (STREAM, SYM)
909
 
910
#define ASM_OUTPUT_LABEL_REF(STREAM, BUF) \
911
 cris_asm_output_label_ref (STREAM, BUF)
912
 
913
/* Remove any previous definition (elfos.h).  */
914
#undef ASM_GENERATE_INTERNAL_LABEL
915
#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \
916
  sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long) NUM)
917
 
918
/* Node: Initialization */
919
/* (no definitions) */
920
 
921
/* Node: Macros for Initialization */
922
/* (no definitions) */
923
 
924
/* Node: Instruction Output */
925
 
926
#define REGISTER_NAMES                                  \
927
 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \
928
  "r9", "r10", "r11", "r12", "r13", "sp", "acr", "srp", "mof", "faked_ap", "dccr"}
929
 
930
#define ADDITIONAL_REGISTER_NAMES \
931
 {{"r14", 14}, {"r15", 15}, {"pc", 15}}
932
 
933
/* Output an empty line to illustrate the presence of the delay slot.  */
934
#define DBR_OUTPUT_SEQEND(FILE) \
935
  fprintf (FILE, "\n")
936
 
937
#define LOCAL_LABEL_PREFIX (TARGET_ELF ? "." : "")
938
 
939
/* cppinit.c initializes a const array from this, so it must be constant,
940
   can't have it different based on options.  Luckily, the prefix is
941
   always allowed, so let's have it on all GCC-generated code.  Note that
942
   we have this verbatim everywhere in the back-end, not using %R or %s or
943
   such.  */
944
#define REGISTER_PREFIX "$"
945
 
946
/* Remove any previous definition (elfos.h).  */
947
/* We use -fno-leading-underscore to remove it, when necessary.  */
948
#undef USER_LABEL_PREFIX
949
#define USER_LABEL_PREFIX "_"
950
 
951
#define ASM_OUTPUT_REG_PUSH(FILE, REGNO)                                \
952
  fprintf (FILE,                                                        \
953
           TARGET_V32                                                   \
954
           ? "\tsubq 4,$sp\n\tmove $%s,[$sp]\n" : "\tpush $%s\n",       \
955
           reg_names[REGNO])
956
 
957
#define ASM_OUTPUT_REG_POP(FILE, REGNO) \
958
  fprintf (FILE, "\tmove [$sp+],$%s\n", reg_names[REGNO])
959
 
960
 
961
/* Node: Dispatch Tables */
962
 
963
#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)                \
964
  do                                                                    \
965
    {                                                                   \
966
      if (TARGET_V32)                                                   \
967
       asm_fprintf (FILE, "\t.word %LL%d-.\n", VALUE);                  \
968
      else                                                              \
969
       asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL);         \
970
    }                                                                   \
971
  while (0)
972
 
973
#define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)  \
974
  asm_fprintf (FILE, "\t.dword %LL%d\n", VALUE)
975
 
976
/* Defined to also emit an .align in elfos.h.  We don't want that.  */
977
#undef ASM_OUTPUT_CASE_LABEL
978
 
979
/* Since the "bound" insn loads the comparison value if the compared<
980
   value (register) is out of bounds (0..comparison value-1), we need
981
   to output another case to catch it.
982
   The way to find it is to look for the label_ref at the else-arm inside
983
   the expanded casesi core-insn.
984
   FIXME: Check this construct when changing to new version of gcc.  */
985
#define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE)                         \
986
  cris_asm_output_case_end (STREAM, NUM, TABLE)
987
 
988
 
989
/* Node: Exception Region Output */
990
/* (no definitions) */
991
/* FIXME: Fill in with our own optimized layout.  */
992
 
993
/* Node: Alignment Output */
994
 
995
#define ASM_OUTPUT_ALIGN(FILE, LOG)  \
996
 fprintf (FILE, "\t.align %d\n", (LOG))
997
 
998
 
999
/* Node: All Debuggers */
1000
 
1001
#define DBX_REGISTER_NUMBER(REGNO)                              \
1002
 ((REGNO) == CRIS_SRP_REGNUM ? CRIS_CANONICAL_SRP_REGNUM :      \
1003
  (REGNO) == CRIS_MOF_REGNUM ? CRIS_CANONICAL_MOF_REGNUM :      \
1004
  (REGNO) == CRIS_CC0_REGNUM ? CRIS_CANONICAL_CC0_REGNUM :      \
1005
 (REGNO))
1006
 
1007
/* FIXME: Investigate DEBUGGER_AUTO_OFFSET, DEBUGGER_ARG_OFFSET.  */
1008
 
1009
 
1010
/* Node: DBX Options */
1011
 
1012
/* Is this correct? Check later.  */
1013
#define DBX_NO_XREFS
1014
 
1015
#define DBX_CONTIN_LENGTH 0
1016
 
1017
/* FIXME: Is this needed when we have 0 DBX_CONTIN_LENGTH?  */
1018
#define DBX_CONTIN_CHAR '?'
1019
 
1020
 
1021
/* Node: DBX Hooks */
1022
/* (no definitions) */
1023
 
1024
/* Node: File names and DBX */
1025
/* (no definitions) */
1026
 
1027
 
1028
/* Node: SDB and DWARF */
1029
/* (no definitions) */
1030
 
1031
/* Node: Misc */
1032
 
1033
/* A combination of the bound (umin) insn together with a
1034
   sign-extended add via the table to PC seems optimal.
1035
   If the table overflows, the assembler will take care of it.
1036
   Theoretically, in extreme cases (uncertain if they occur), an error
1037
   will be emitted, so FIXME: Check how large case-tables are emitted,
1038
   possible add an option to emit SImode case-tables.  */
1039
#define CASE_VECTOR_MODE HImode
1040
 
1041
#define CASE_VECTOR_PC_RELATIVE 1
1042
 
1043
/* FIXME: Investigate CASE_VECTOR_SHORTEN_MODE to make sure HImode is not
1044
   used when broken-.word could possibly fail (plus testcase).  */
1045
 
1046
#define FIXUNS_TRUNC_LIKE_FIX_TRUNC
1047
 
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.  */
1051
#define MOVE_MAX 4
1052
 
1053
/* Maybe SHIFT_COUNT_TRUNCATED is safe to define?  FIXME: Check later.  */
1054
 
1055
#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
1056
 
1057
#define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
1058
#define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1)
1059
 
1060
#define Pmode SImode
1061
 
1062
#define FUNCTION_MODE QImode
1063
 
1064
#define NO_IMPLICIT_EXTERN_C
1065
 
1066
/*
1067
 * Local variables:
1068
 * eval: (c-set-style "gnu")
1069
 * indent-tabs-mode: t
1070
 * End:
1071
 */

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