1 /* Definitions for GCC. Part of the machine description for CRIS. 2 Copyright (C) 1998-2015 Free Software Foundation, Inc. 3 Contributed by Axis Communications. Written by Hans-Peter Nilsson. 4 5 This file is part of GCC. 6 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) 10 any later version. 11 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. 16 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/>. */ 20 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. 26 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. */ 33 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. */ 38 39 /* We don't want to use gcc_assert for everything, as that can be 40 compiled out. */ 41 #define CRIS_ASSERT(x) \ 42 do { if (!(x)) internal_error ("CRIS-port assertion failed: " #x); } while (0) 43 44 /* Replacement for REG_P since it does not match SUBREGs. Happens for 45 testcase Axis-20000320 with gcc-2.9x. */ 46 #define REG_S_P(x) \ 47 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (XEXP (x, 0)))) 48 49 /* Last register in main register bank r0..r15. */ 50 #define CRIS_LAST_GENERAL_REGISTER 15 51 52 /* Descriptions of registers used for arguments. */ 53 #define CRIS_FIRST_ARG_REG 10 54 #define CRIS_MAX_ARGS_IN_REGS 4 55 56 /* See also *_REGNUM constants in cris.md. */ 57 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) 66 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" 75 76 #define CRIS_FUNCTION_ARG_SIZE(MODE, TYPE) \ 77 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) \ 78 : (unsigned) int_size_in_bytes (TYPE)) 79 80 /* Which CPU version this is. The parsed and adjusted cris_cpu_str. */ 81 extern int cris_cpu_version; 82 83 84 /* Node: Driver */ 85 86 /* Also provide canonical vN definitions when user specifies an alias. */ 87 88 #define CPP_SPEC \ 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}\ 109 %(cpp_subtarget)" 110 111 /* For the cris-*-elf subtarget. */ 112 113 #define CRIS_DEFAULT_TUNE "10" 114 #define CRIS_ARCH_CPP_DEFAULT 115 #define CRIS_DEFAULT_ASM_ARCH_OPTION "" 116 117 #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." 120 #endif 121 122 #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" 129 #endif 130 131 #undef CRIS_ARCH_CPP_DEFAULT 132 #define CRIS_ARCH_CPP_DEFAULT \ 133 "%{!march=*:\ 134 %{!metrax*:\ 135 %{!mcpu=*:\ 136 %{!mtune=*:-D__tune_v" CRIS_DEFAULT_TUNE "}\ 137 -D__arch_v"CRIS_DEFAULT_TUNE\ 138 " -D__CRIS_arch_version=" CRIS_DEFAULT_TUNE "}}}" 139 #endif 140 141 #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 148 149 /* Override previous definitions (../linux.h). */ 150 #undef CC1_SPEC 151 #define CC1_SPEC \ 152 "%{metrax4:-march=v3}\ 153 %{metrax100:-march=v8}\ 154 %{march=*:-march=%*}\ 155 %{mcpu=*:-mcpu=%*}\ 156 %(cc1_subtarget)" 157 158 /* For the cris-*-elf subtarget. */ 159 #define CRIS_CC1_SUBTARGET_SPEC \ 160 "-melf\ 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}}}}" 168 169 /* This adds to CC1_SPEC. */ 170 #define CC1PLUS_SPEC "" 171 172 #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} " 175 #else 176 #define MAYBE_AS_NO_MUL_BUG_ABORT 177 #endif 178 179 /* Override previous definitions (../linux.h). */ 180 #undef ASM_SPEC 181 #define ASM_SPEC \ 182 MAYBE_AS_NO_MUL_BUG_ABORT \ 183 "%(asm_subtarget)\ 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}" 188 189 /* For the cris-*-elf subtarget. */ 190 #define CRIS_ASM_SUBTARGET_SPEC \ 191 "--em=criself %{!march=*:%{!mcpu=*:" CRIS_DEFAULT_ASM_ARCH_OPTION "}}" 192 193 /* 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 197 time being. */ 198 #undef LINK_SPEC 199 #define LINK_SPEC \ 200 "%{v:--verbose}\ 201 %(link_subtarget)" 202 203 /* For the cris-*-elf subtarget. */ 204 #define CRIS_LINK_SUBTARGET_SPEC \ 205 "-mcriself\ 206 %{sim2:%{!T*:-Tdata 0x4000000 -Tbss 0x8000000}}\ 207 %{!r:%{O2|O3: --gc-sections}}" 208 209 /* 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" 212 library. */ 213 /* Override previous definitions (linux.h). */ 214 #undef LIB_SPEC 215 #define LIB_SPEC \ 216 "%{sim*:--start-group -lc -lsyslinux --end-group}\ 217 %{!sim*:%{g*:-lg}\ 218 %{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p} -lbsp}\ 219 -lnosys" 220 221 /* 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" 227 228 #undef ENDFILE_SPEC 229 #define ENDFILE_SPEC "crtend.o%s crtn.o%s" 230 231 #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 237 238 #define CRIS_SUBTARGET_EXTRA_SPECS 239 240 241 /* Node: Run-time Target */ 242 243 #define TARGET_CPU_CPP_BUILTINS() \ 244 do \ 245 { \ 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"); \ 252 } \ 253 while (0) 254 255 /* Previously controlled by target_flags. Note that this is *not* set 256 for -melinux. */ 257 #define TARGET_LINUX 0 258 259 /* For the cris-*-elf subtarget. */ 260 #define CRIS_SUBTARGET_DEFAULT 0 261 262 #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. */ 267 268 #ifndef TARGET_CPU_DEFAULT 269 #define TARGET_CPU_DEFAULT CRIS_CPU_BASE 270 #endif 271 272 /* 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 \ 279 (MASK_STACK_ALIGN \ 280 + MASK_CONST_ALIGN + MASK_DATA_ALIGN \ 281 + MASK_ALIGN_BY_32 \ 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 \ 287 + MASK_ALIGN_BY_32 \ 288 + MASK_PROLOGUE_EPILOGUE + MASK_MUL_BUG) 289 # else /* 0 */ 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) 294 # endif 295 #endif 296 297 /* Local, providing a default for cris_cpu_version. */ 298 #define CRIS_DEFAULT_CPU_VERSION TARGET_CPU_DEFAULT 299 300 #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) 305 306 /* 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) 309 310 /* 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) 314 315 /* 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) 324 325 /* Node: Storage Layout */ 326 327 #define BITS_BIG_ENDIAN 0 328 329 #define BYTES_BIG_ENDIAN 0 330 331 /* 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 0 335 336 #define UNITS_PER_WORD 4 337 338 #define CRIS_PROMOTED_MODE(MODE, UNSIGNEDP, TYPE) \ 339 (GET_MODE_CLASS (MODE) == MODE_INT && GET_MODE_SIZE (MODE) < 4) \ 340 ? SImode : MODE 341 342 /* We will be using prototype promotion, so they will be 32 bit. */ 343 #define PARM_BOUNDARY 32 344 345 /* Stack boundary is guided by -mstack-align, -mno-stack-align, 346 -malign. 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) 356 357 #define FUNCTION_BOUNDARY 16 358 359 /* Do not change BIGGEST_ALIGNMENT (when optimizing), as it will affect 360 strange places, at least in 2.1. */ 361 #define BIGGEST_ALIGNMENT 8 362 363 /* If -m16bit, -m16-bit, -malign or -mdata-align, 364 align everything to 16 bit. */ 365 #define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \ 366 (TARGET_DATA_ALIGN \ 367 ? (TARGET_ALIGN_BY_32 \ 368 ? (BASIC_ALIGN < 32 ? 32 : BASIC_ALIGN) \ 369 : (BASIC_ALIGN < 16 ? 16 : BASIC_ALIGN)) : BASIC_ALIGN) 370 371 /* 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) 381 382 /* FIXME: Define LOCAL_ALIGNMENT for word and dword or arrays and 383 structures (if -mstack-align=), and check that it is good. */ 384 385 #define EMPTY_FIELD_BOUNDARY 8 386 387 #define STRUCTURE_SIZE_BOUNDARY 8 388 389 #define STRICT_ALIGNMENT 0 390 391 /* 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 396 397 /* 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 32 403 404 405 /* Node: Type Layout */ 406 407 /* 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. */ 409 410 /* For compatibility and historical reasons, a char should be signed. */ 411 #define DEFAULT_SIGNED_CHAR 1 412 413 /* Note that WCHAR_TYPE_SIZE is used in cexp.y, 414 where TARGET_SHORT is not available. */ 415 #undef WCHAR_TYPE 416 #define WCHAR_TYPE "long int" 417 418 #undef WCHAR_TYPE_SIZE 419 #define WCHAR_TYPE_SIZE 32 420 421 422 /* Node: Register Basics */ 423 424 /* 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) 427 428 /* 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 432 is fixed too. */ 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} 435 436 /* 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} 440 441 /* Node: Allocation Order */ 442 443 /* 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. 449 450 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. 454 455 Order of preference: Call-used-regs first, then r0 and up, last fp & 456 sp & pc as fillers. 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} 463 464 /* 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} 470 471 472 /* Node: Values in Registers */ 473 474 /* 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) \ 477 (MODE == VOIDmode \ 478 ? 1 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) 479 480 /* CRIS permits all registers to hold all modes. Well, except for the 481 condition-code register. And we can't hold larger-than-register size 482 modes in the last special register that can hold a full 32 bits. */ 483 #define HARD_REGNO_MODE_OK(REGNO, MODE) \ 484 (((MODE) == CCmode \ 485 || (REGNO) != CRIS_CC0_REGNUM) \ 486 && (GET_MODE_SIZE (MODE) <= UNITS_PER_WORD \ 487 || ((REGNO) != CRIS_MOF_REGNUM && (REGNO) != CRIS_ACR_REGNUM))) 488 489 /* Because CCmode isn't covered by the "narrower mode" statement in 490 tm.texi, we can still say all modes are tieable despite not having an 491 always 1 HARD_REGNO_MODE_OK. */ 492 #define MODES_TIEABLE_P(MODE1, MODE2) 1 493 494 495 /* Node: Leaf Functions */ 496 /* (no definitions) */ 497 498 /* Node: Stack Registers */ 499 /* (no definitions) */ 500 501 502 /* Node: Register Classes */ 503 504 /* We need a separate register class to handle register allocation for 505 ACR, since it can't be used for post-increment. 506 507 It's not obvious, but having subunions of all movable-between 508 register classes does really help register allocation (pre-IRA 509 comment). */ 510 enum reg_class 511 { 512 NO_REGS, 513 ACR_REGS, MOF_REGS, SRP_REGS, CC0_REGS, 514 MOF_SRP_REGS, SPECIAL_REGS, 515 SPEC_ACR_REGS, GENNONACR_REGS, 516 SPEC_GENNONACR_REGS, GENERAL_REGS, 517 ALL_REGS, 518 LIM_REG_CLASSES 519 }; 520 521 #define N_REG_CLASSES (int) LIM_REG_CLASSES 522 523 #define REG_CLASS_NAMES \ 524 {"NO_REGS", \ 525 "ACR_REGS", "MOF_REGS", "SRP_REGS", "CC0_REGS", \ 526 "MOF_SRP_REGS", "SPECIAL_REGS", \ 527 "SPEC_ACR_REGS", "GENNONACR_REGS", "SPEC_GENNONACR_REGS", \ 528 "GENERAL_REGS", "ALL_REGS"} 529 530 #define CRIS_SPECIAL_REGS_CONTENTS \ 531 ((1 << CRIS_SRP_REGNUM) | (1 << CRIS_MOF_REGNUM) | (1 << CRIS_CC0_REGNUM)) 532 533 /* Count in the faked argument register in GENERAL_REGS. Keep out SRP. */ 534 #define REG_CLASS_CONTENTS \ 535 { \ 536 {0}, \ 537 {1 << CRIS_ACR_REGNUM}, \ 538 {1 << CRIS_MOF_REGNUM}, \ 539 {1 << CRIS_SRP_REGNUM}, \ 540 {1 << CRIS_CC0_REGNUM}, \ 541 {(1 << CRIS_MOF_REGNUM) \ 542 | (1 << CRIS_SRP_REGNUM)}, \ 543 {CRIS_SPECIAL_REGS_CONTENTS}, \ 544 {CRIS_SPECIAL_REGS_CONTENTS \ 545 | (1 << CRIS_ACR_REGNUM)}, \ 546 {(0xffff | (1 << CRIS_AP_REGNUM)) \ 547 & ~(1 << CRIS_ACR_REGNUM)}, \ 548 {(0xffff | (1 << CRIS_AP_REGNUM) \ 549 | CRIS_SPECIAL_REGS_CONTENTS) \ 550 & ~(1 << CRIS_ACR_REGNUM)}, \ 551 {0xffff | (1 << CRIS_AP_REGNUM)}, \ 552 {0xffff | (1 << CRIS_AP_REGNUM) \ 553 | CRIS_SPECIAL_REGS_CONTENTS} \ 554 } 555 556 #define REGNO_REG_CLASS(REGNO) \ 557 ((REGNO) == CRIS_ACR_REGNUM ? ACR_REGS : \ 558 (REGNO) == CRIS_MOF_REGNUM ? MOF_REGS : \ 559 (REGNO) == CRIS_SRP_REGNUM ? SRP_REGS : \ 560 (REGNO) == CRIS_CC0_REGNUM ? CC0_REGS : \ 561 GENERAL_REGS) 562 563 #define BASE_REG_CLASS GENERAL_REGS 564 565 #define MODE_CODE_BASE_REG_CLASS(MODE, AS, OCODE, ICODE) \ 566 ((OCODE) != POST_INC ? BASE_REG_CLASS : GENNONACR_REGS) 567 568 #define INDEX_REG_CLASS GENERAL_REGS 569 570 /* Since it uses reg_renumber, it is safe only once reg_renumber 571 has been allocated, which happens in reginfo.c during register 572 allocation. */ 573 #define REGNO_OK_FOR_BASE_P(REGNO) \ 574 ((REGNO) <= CRIS_LAST_GENERAL_REGISTER \ 575 || (REGNO) == ARG_POINTER_REGNUM \ 576 || (unsigned) reg_renumber[REGNO] <= CRIS_LAST_GENERAL_REGISTER \ 577 || (unsigned) reg_renumber[REGNO] == ARG_POINTER_REGNUM) 578 579 /* REGNO_OK_FOR_BASE_P seems to be obsolete wrt. this one, but not yet 580 documented as such. */ 581 #define REGNO_MODE_CODE_OK_FOR_BASE_P(REGNO, MODE, AS, OCODE, ICODE) \ 582 (REGNO_OK_FOR_BASE_P (REGNO) \ 583 && ((OCODE) != POST_INC \ 584 || !((REGNO) == CRIS_ACR_REGNUM \ 585 || (unsigned) reg_renumber[REGNO] == CRIS_ACR_REGNUM))) 586 587 /* See REGNO_OK_FOR_BASE_P. */ 588 #define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P(REGNO) 589 590 /* We can't move special registers to and from memory in smaller than 591 word_mode. We also can't move between special registers. Luckily, 592 -1, as returned by true_regnum for non-sub/registers, is valid as a 593 parameter to our REGNO_REG_CLASS, returning GENERAL_REGS, so we get 594 the effect that any X that isn't a special-register is treated as 595 a non-empty intersection with GENERAL_REGS. */ 596 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \ 597 ((reg_class_subset_p (CLASS, SPECIAL_REGS) \ 598 && ((GET_MODE_SIZE (MODE) < 4 && MEM_P (X)) \ 599 || !reg_classes_intersect_p (REGNO_REG_CLASS (true_regnum (X)), \ 600 GENERAL_REGS))) \ 601 ? GENERAL_REGS : NO_REGS) 602 603 /* FIXME: Fix regrename.c; it should check validity of replacements, 604 not just with a silly pass-specific macro. We may miss some 605 opportunities, but we must stop regrename from creating acr++. */ 606 #define HARD_REGNO_RENAME_OK(FROM, TO) ((TO) != CRIS_ACR_REGNUM) 607 608 /* For CRIS, this is always the size of MODE in words, 609 since all registers are the same size. To use omitted modes in 610 patterns with reload constraints, you must say the widest size 611 which is allowed for VOIDmode. 612 FIXME: Does that still apply for gcc-2.9x? Keep poisoned until such 613 patterns are added back. News: 2001-03-16: Happens as early as the 614 underscore-test. */ 615 #define CLASS_MAX_NREGS(CLASS, MODE) \ 616 ((MODE) == VOIDmode \ 617 ? 1 /* + cris_fatal ("CLASS_MAX_NREGS with VOIDmode") */ \ 618 : ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)) 619 620 621 /* Node: Frame Layout */ 622 623 #define STACK_GROWS_DOWNWARD 624 #define FRAME_GROWS_DOWNWARD 1 625 626 /* It seems to be indicated in the code (at least 2.1) that this is 627 better a constant, and best 0. */ 628 #define STARTING_FRAME_OFFSET 0 629 630 #define FIRST_PARM_OFFSET(FNDECL) 0 631 632 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \ 633 cris_return_addr_rtx (COUNT, FRAMEADDR) 634 635 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, CRIS_SRP_REGNUM) 636 637 /* FIXME: Any __builtin_eh_return callers must not return anything and 638 there must not be collisions with incoming parameters. Luckily the 639 number of __builtin_eh_return callers is limited. For now return 640 parameter registers in reverse order and hope for the best. */ 641 #define EH_RETURN_DATA_REGNO(N) \ 642 (IN_RANGE ((N), 0, 3) ? (CRIS_FIRST_ARG_REG + 3 - (N)) : INVALID_REGNUM) 643 644 /* Store the stack adjustment in the structure-return-address register. */ 645 #define CRIS_STACKADJ_REG CRIS_STRUCT_VALUE_REGNUM 646 #define EH_RETURN_STACKADJ_RTX gen_rtx_REG (SImode, CRIS_STACKADJ_REG) 647 648 #define EH_RETURN_HANDLER_RTX \ 649 cris_return_addr_rtx (0, NULL) 650 651 #define INIT_EXPANDERS cris_init_expanders () 652 653 /* FIXME: Move this to right node (it's not documented properly yet). */ 654 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (CRIS_SRP_REGNUM) 655 656 /* FIXME: Move this to right node (it's not documented properly yet). 657 FIXME: Check what alignment we can assume regarding 658 TARGET_STACK_ALIGN and TARGET_ALIGN_BY_32. */ 659 #define DWARF_CIE_DATA_ALIGNMENT -1 660 661 /* If we would ever need an exact mapping between canonical register 662 number and dwarf frame register, we would either need to include all 663 registers in the gcc description (with some marked fixed of course), or 664 an inverse mapping from dwarf register to gcc register. There is one 665 need in dwarf2out.c:expand_builtin_init_dwarf_reg_sizes. Right now, I 666 don't see that we need exact correspondence between DWARF *frame* 667 registers and DBX_REGISTER_NUMBER, so map them onto GCC registers. */ 668 #define DWARF_FRAME_REGNUM(REG) (REG) 669 670 /* Node: Stack Checking */ 671 /* (no definitions) FIXME: Check. */ 672 673 /* Node: Frame Registers */ 674 675 #define STACK_POINTER_REGNUM CRIS_SP_REGNUM 676 677 /* Register used for frame pointer. This is also the last of the saved 678 registers, when a frame pointer is not used. */ 679 #define FRAME_POINTER_REGNUM CRIS_FP_REGNUM 680 681 /* Faked register, is always eliminated. We need it to eliminate 682 allocating stack slots for the return address and the frame pointer. */ 683 #define ARG_POINTER_REGNUM CRIS_AP_REGNUM 684 685 #define STATIC_CHAIN_REGNUM CRIS_STATIC_CHAIN_REGNUM 686 687 688 /* Node: Elimination */ 689 690 #define ELIMINABLE_REGS \ 691 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 692 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 693 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} 694 695 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 696 (OFFSET) = cris_initial_elimination_offset (FROM, TO) 697 698 699 /* Node: Stack Arguments */ 700 701 /* Since many parameters take up one register each in any case, 702 defining TARGET_PROMOTE_PROTOTYPES that always returns true would 703 seem like a good idea, but measurements indicate that a combination 704 using PROMOTE_MODE is better. */ 705 706 #define ACCUMULATE_OUTGOING_ARGS 1 707 708 709 /* Node: Register Arguments */ 710 711 /* Contrary to what you'd believe, defining FUNCTION_ARG_CALLEE_COPIES 712 seems like a (small total) loss, at least for gcc-2.7.2 compiling and 713 running gcc-2.1 (small win in size, small loss running -- 100.1%), 714 and similarly for size for products (.1 .. .3% bloat, sometimes win). 715 Due to the empirical likeliness of making slower code, it is not 716 defined. */ 717 718 /* This no longer *needs* to be a structure; but keeping it as such should 719 not hurt (and hacking the ABI is simpler). */ 720 #define CUMULATIVE_ARGS struct cum_args 721 struct cum_args {int regs;}; 722 723 /* The regs member is an integer, the number of arguments got into 724 registers so far. */ 725 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \ 726 ((CUM).regs = 0) 727 728 #define FUNCTION_ARG_REGNO_P(REGNO) \ 729 ((REGNO) >= CRIS_FIRST_ARG_REG \ 730 && (REGNO) < CRIS_FIRST_ARG_REG + (CRIS_MAX_ARGS_IN_REGS)) 731 732 733 /* Node: Aggregate Return */ 734 735 #define CRIS_STRUCT_VALUE_REGNUM ((CRIS_FIRST_ARG_REG) - 1) 736 737 738 /* Node: Caller Saves */ 739 /* (no definitions) */ 740 741 /* Node: Function entry */ 742 743 /* See cris.c for TARGET_ASM_FUNCTION_PROLOGUE and 744 TARGET_ASM_FUNCTION_EPILOGUE. */ 745 746 /* Node: Profiling */ 747 748 #define FUNCTION_PROFILER(FILE, LABELNO) \ 749 error ("no FUNCTION_PROFILER for CRIS") 750 751 /* FIXME: Some of the undefined macros might be mandatory. If so, fix 752 documentation. */ 753 754 755 /* Node: Trampolines */ 756 757 #define TRAMPOLINE_SIZE (TARGET_V32 ? 58 : 32) 758 759 /* CRIS wants instructions on word-boundary. */ 760 #define TRAMPOLINE_ALIGNMENT 16 761 762 /* Node: Library Calls */ 763 764 /* If you change this, you have to check whatever libraries and systems 765 that use it. */ 766 #define TARGET_EDOM 33 767 768 769 /* Node: Addressing Modes */ 770 771 #define HAVE_POST_INCREMENT 1 772 773 #define CONSTANT_ADDRESS_P(X) \ 774 (CONSTANT_P (X) && cris_legitimate_address_p (QImode, X, false)) 775 776 /* Must be a compile-time constant, so we go with the highest value 777 among all CRIS variants. */ 778 #define MAX_REGS_PER_ADDRESS 2 779 780 /* Fix reloads known to cause suboptimal spilling. */ 781 #define LEGITIMIZE_RELOAD_ADDRESS(X, MODE, OPNUM, TYPE, INDL, WIN) \ 782 do \ 783 { \ 784 if (cris_reload_address_legitimized (X, MODE, OPNUM, TYPE, INDL)) \ 785 goto WIN; \ 786 } \ 787 while (0) 788 789 /* The mode argument to cris_legitimate_constant_p isn't used, so just 790 pass a cheap dummy. N.B. we have to cast away const from the 791 parameter rather than adjust the parameter, as it's type is mandated 792 by the TARGET_LEGITIMATE_CONSTANT_P target hook interface. */ 793 #define CRIS_CONSTANT_P(X) \ 794 (CONSTANT_P (X) && cris_legitimate_constant_p (VOIDmode, CONST_CAST_RTX (X))) 795 796 /* Node: Condition Code */ 797 798 #define NOTICE_UPDATE_CC(EXP, INSN) cris_notice_update_cc (EXP, INSN) 799 800 /* FIXME: Maybe define CANONICALIZE_COMPARISON later, when playing with 801 optimizations. It is needed; currently we do this with instruction 802 patterns and NOTICE_UPDATE_CC. */ 803 804 805 /* Node: Costs */ 806 807 /* Regardless of the presence of delay slots, the default value of 1 for 808 BRANCH_COST is the best in the range (1, 2, 3), tested with gcc-2.7.2 809 with testcases ipps and gcc, giving smallest and fastest code. */ 810 811 #define SLOW_BYTE_ACCESS 0 812 813 /* This is the threshold *below* which inline move sequences of 814 word-length sizes will be emitted. The "9" will translate to 815 (9 - 1) * 4 = 32 bytes maximum moved, but using 16 instructions 816 (8 instruction sequences) or less. */ 817 #define MOVE_RATIO(speed) 9 818 819 820 /* Node: Sections */ 821 822 #define TEXT_SECTION_ASM_OP "\t.text" 823 824 #define DATA_SECTION_ASM_OP "\t.data" 825 826 /* The jump table is immediately connected to the preceding insn. */ 827 #define JUMP_TABLES_IN_TEXT_SECTION 1 828 829 830 /* Node: PIC */ 831 832 /* Helper type. */ 833 834 enum cris_symbol_type 835 { 836 cris_no_symbol = 0, 837 cris_got_symbol = 1, 838 cris_rel_symbol = 2, 839 cris_got_symbol_needing_fixup = 3, 840 cris_unspec = 7, 841 cris_offsettable_symbol = 8 842 }; 843 844 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? CRIS_GOT_REGNUM : INVALID_REGNUM) 845 846 #define LEGITIMATE_PIC_OPERAND_P(X) cris_legitimate_pic_operand (X) 847 848 849 /* Node: File Framework */ 850 851 /* We don't want an .ident for gcc. To avoid that but still support 852 #ident, we override TARGET_ASM_OUTPUT_IDENT and, since the gcc .ident 853 is its only use besides front-end .ident directives, we return if 854 the state if the cgraph is not PARSING. */ 855 #undef TARGET_ASM_OUTPUT_IDENT 856 #define TARGET_ASM_OUTPUT_IDENT cris_asm_output_ident 857 858 #define ASM_APP_ON "#APP\n" 859 860 #define ASM_APP_OFF "#NO_APP\n" 861 862 863 /* Node: Data Output */ 864 865 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C, STR) (C) == '@' 866 867 /* Node: Uninitialized Data */ 868 869 /* Remember to round off odd values if we want data alignment, 870 since we cannot do that with an .align directive. 871 872 Using .comm causes the space not to be reserved in .bss, but by 873 tricks with the symbol type. Not good if other tools than binutils 874 are used on the object files. Since ".global ... .lcomm ..." works, we 875 use that. Use .._ALIGNED_COMMON, since gcc whines when we only have 876 ..._COMMON, and we prefer to whine ourselves; BIGGEST_ALIGNMENT is not 877 the one to check. */ 878 /* FIXME: I suspect a bug in gcc with alignment. Do not warn until 879 investigated; it mucks up the testsuite results. */ 880 #define CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, LOCAL) \ 881 do \ 882 { \ 883 int align_ = (ALIGN) / BITS_PER_UNIT; \ 884 if (TARGET_DATA_ALIGN && TARGET_ALIGN_BY_32 && align_ < 4) \ 885 align_ = 4; \ 886 else if (TARGET_DATA_ALIGN && align_ < 2) \ 887 align_ = 2; \ 888 /* FIXME: Do we need this? */ \ 889 else if (align_ < 1) \ 890 align_ = 1; \ 891 \ 892 if (LOCAL) \ 893 { \ 894 fprintf ((FILE), "%s", LOCAL_ASM_OP); \ 895 assemble_name ((FILE), (NAME)); \ 896 fprintf ((FILE), "\n"); \ 897 } \ 898 fprintf ((FILE), "%s", COMMON_ASM_OP); \ 899 assemble_name ((FILE), (NAME)); \ 900 fprintf ((FILE), ",%u,%u\n", (int)(SIZE), align_); \ 901 } \ 902 while (0) 903 904 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN) \ 905 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 0) 906 907 #undef ASM_OUTPUT_ALIGNED_DECL_LOCAL 908 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \ 909 CRIS_ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN, 1) 910 911 /* Node: Label Output */ 912 913 /* Globalizing directive for a label. */ 914 #define GLOBAL_ASM_OP "\t.global " 915 916 #define SUPPORTS_WEAK 1 917 918 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYM) \ 919 cris_asm_output_symbol_ref (STREAM, SYM) 920 921 #define ASM_OUTPUT_LABEL_REF(STREAM, BUF) \ 922 cris_asm_output_label_ref (STREAM, BUF) 923 924 /* Remove any previous definition (elfos.h). */ 925 #undef ASM_GENERATE_INTERNAL_LABEL 926 #define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ 927 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long) NUM) 928 929 /* Node: Initialization */ 930 /* (no definitions) */ 931 932 /* Node: Macros for Initialization */ 933 /* (no definitions) */ 934 935 /* Node: Instruction Output */ 936 937 #define REGISTER_NAMES \ 938 {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", \ 939 "r9", "r10", "r11", "r12", "r13", "sp", "acr", "srp", "mof", "faked_ap", "dccr"} 940 941 #define ADDITIONAL_REGISTER_NAMES \ 942 {{"r14", 14}, {"r15", 15}, {"pc", 15}} 943 944 /* Output an empty line to illustrate the presence of the delay slot. */ 945 #define DBR_OUTPUT_SEQEND(FILE) \ 946 fprintf (FILE, "\n") 947 948 #define LOCAL_LABEL_PREFIX "." 949 950 /* cppinit.c initializes a const array from this, so it must be constant, 951 can't have it different based on options. Luckily, the prefix is 952 always allowed, so let's have it on all GCC-generated code. Note that 953 we have this verbatim everywhere in the back-end, not using %R or %s or 954 such. */ 955 #define REGISTER_PREFIX "$" 956 957 /* Remove any previous definition (elfos.h). */ 958 /* We use -fno-leading-underscore to remove it, when necessary. */ 959 #undef USER_LABEL_PREFIX 960 #define USER_LABEL_PREFIX "_" 961 962 #define ASM_OUTPUT_REG_PUSH(FILE, REGNO) \ 963 fprintf (FILE, \ 964 TARGET_V32 \ 965 ? "\tsubq 4,$sp\n\tmove $%s,[$sp]\n" : "\tpush $%s\n", \ 966 reg_names[REGNO]) 967 968 #define ASM_OUTPUT_REG_POP(FILE, REGNO) \ 969 fprintf (FILE, "\tmove [$sp+],$%s\n", reg_names[REGNO]) 970 971 972 /* Node: Dispatch Tables */ 973 974 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 975 do \ 976 { \ 977 if (TARGET_V32) \ 978 asm_fprintf (FILE, "\t.word %LL%d-.\n", VALUE); \ 979 else \ 980 asm_fprintf (FILE, "\t.word %LL%d-%LL%d\n", VALUE, REL); \ 981 } \ 982 while (0) 983 984 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 985 asm_fprintf (FILE, "\t.dword %LL%d\n", VALUE) 986 987 /* Defined to also emit an .align in elfos.h. We don't want that. */ 988 #undef ASM_OUTPUT_CASE_LABEL 989 990 /* Since the "bound" insn loads the comparison value if the compared< 991 value (register) is out of bounds (0..comparison value-1), we need 992 to output another case to catch it. 993 The way to find it is to look for the label_ref at the else-arm inside 994 the expanded casesi core-insn. 995 FIXME: Check this construct when changing to new version of gcc. */ 996 #define ASM_OUTPUT_CASE_END(STREAM, NUM, TABLE) \ 997 cris_asm_output_case_end (STREAM, NUM, TABLE) 998 999 1000 /* Node: Exception Region Output */ 1001 /* (no definitions) */ 1002 /* FIXME: Fill in with our own optimized layout. */ 1003 1004 /* Node: Alignment Output */ 1005 1006 #define ASM_OUTPUT_ALIGN(FILE, LOG) \ 1007 fprintf (FILE, "\t.align %d\n", (LOG)) 1008 1009 1010 /* Node: All Debuggers */ 1011 1012 #define DBX_REGISTER_NUMBER(REGNO) \ 1013 ((REGNO) == CRIS_SRP_REGNUM ? CRIS_CANONICAL_SRP_REGNUM : \ 1014 (REGNO) == CRIS_MOF_REGNUM ? CRIS_CANONICAL_MOF_REGNUM : \ 1015 (REGNO) == CRIS_CC0_REGNUM ? CRIS_CANONICAL_CC0_REGNUM : \ 1016 (REGNO)) 1017 1018 /* FIXME: Investigate DEBUGGER_AUTO_OFFSET, DEBUGGER_ARG_OFFSET. */ 1019 1020 1021 /* Node: DBX Options */ 1022 1023 /* Is this correct? Check later. */ 1024 #define DBX_NO_XREFS 1025 1026 #define DBX_CONTIN_LENGTH 0 1027 1028 /* FIXME: Is this needed when we have 0 DBX_CONTIN_LENGTH? */ 1029 #define DBX_CONTIN_CHAR '?' 1030 1031 1032 /* Node: DBX Hooks */ 1033 /* (no definitions) */ 1034 1035 /* Node: File names and DBX */ 1036 /* (no definitions) */ 1037 1038 1039 /* Node: SDB and DWARF */ 1040 /* (no definitions) */ 1041 1042 /* Node: Misc */ 1043 1044 /* A combination of the bound (umin) insn together with a 1045 sign-extended add via the table to PC seems optimal. 1046 If the table overflows, the assembler will take care of it. 1047 Theoretically, in extreme cases (uncertain if they occur), an error 1048 will be emitted, so FIXME: Check how large case-tables are emitted, 1049 possible add an option to emit SImode case-tables. */ 1050 #define CASE_VECTOR_MODE HImode 1051 1052 #define CASE_VECTOR_PC_RELATIVE 1 1053 1054 /* FIXME: Investigate CASE_VECTOR_SHORTEN_MODE to make sure HImode is not 1055 used when broken-.word could possibly fail (plus testcase). */ 1056 1057 /* This is the number of bytes that can be moved in one 1058 reasonably fast instruction sequence. For CRIS, this is two 1059 instructions: mem => reg, reg => mem. */ 1060 #define MOVE_MAX 4 1061 1062 /* Maybe SHIFT_COUNT_TRUNCATED is safe to define? FIXME: Check later. */ 1063 1064 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 1065 1066 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1) 1067 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 32, 1) 1068 1069 #define Pmode SImode 1070 1071 #define FUNCTION_MODE QImode 1072 1073 #define NO_IMPLICIT_EXTERN_C 1074 1075 /* 1076 * Local variables: 1077 * eval: (c-set-style "gnu") 1078 * indent-tabs-mode: t 1079 * End: 1080 */ 1081