1/* Definitions of target machine for GNU compiler, for MMIX. 2 Copyright (C) 2000, 2001, 2002, 2004, 2005 Free Software Foundation, Inc. 3 Contributed by Hans-Peter Nilsson (hp@bitrange.com) 4 5This file is part of GCC. 6 7GCC is free software; you can redistribute it and/or modify 8it under the terms of the GNU General Public License as published by 9the Free Software Foundation; either version 2, or (at your option) 10any later version. 11 12GCC is distributed in the hope that it will be useful, 13but WITHOUT ANY WARRANTY; without even the implied warranty of 14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15GNU General Public License for more details. 16 17You should have received a copy of the GNU General Public License 18along with GCC; see the file COPYING. If not, write to 19the Free Software Foundation, 51 Franklin Street, Fifth Floor, 20Boston, MA 02110-1301, USA. */ 21 22#ifndef GCC_MMIX_H 23#define GCC_MMIX_H 24 25/* First, some local helper macros. Note that the "default" value of 26 FIXED_REGISTERS, CALL_USED_REGISTERS, REG_ALLOC_ORDER and 27 REG_CLASS_CONTENTS depend on these values. */ 28#define MMIX_RESERVED_GNU_ARG_0_REGNUM 231 29#define MMIX_FIRST_ARG_REGNUM \ 30 (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 16) 31#define MMIX_FIRST_INCOMING_ARG_REGNUM \ 32 (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0) 33#define MMIX_MAX_ARGS_IN_REGS 16 34 35/* FIXME: This one isn't fully implemented yet. Return values larger than 36 one register are passed by reference in MMIX_STRUCT_VALUE_REGNUM by the 37 caller, except for return values of type "complex". */ 38#define MMIX_MAX_REGS_FOR_VALUE 16 39#define MMIX_RETURN_VALUE_REGNUM \ 40 (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 15) 41#define MMIX_OUTGOING_RETURN_VALUE_REGNUM \ 42 (TARGET_ABI_GNU ? MMIX_RESERVED_GNU_ARG_0_REGNUM : 0) 43#define MMIX_STRUCT_VALUE_REGNUM 251 44#define MMIX_STATIC_CHAIN_REGNUM 252 45#define MMIX_FRAME_POINTER_REGNUM 253 46#define MMIX_STACK_POINTER_REGNUM 254 47#define MMIX_LAST_GENERAL_REGISTER 255 48#define MMIX_INCOMING_RETURN_ADDRESS_REGNUM MMIX_rJ_REGNUM 49#define MMIX_HIMULT_REGNUM 258 50#define MMIX_REMAINDER_REGNUM MMIX_rR_REGNUM 51#define MMIX_ARG_POINTER_REGNUM 261 52#define MMIX_rO_REGNUM 262 53#define MMIX_LAST_STACK_REGISTER_REGNUM 31 54 55/* Four registers; "ideally, these registers should be call-clobbered", so 56 just grab a bunch of the common clobbered registers. FIXME: Last 57 registers of return-value should be used, with an error if there's a 58 return-value (that collides in size). */ 59#define MMIX_EH_RETURN_DATA_REGNO_START (MMIX_STRUCT_VALUE_REGNUM - 4) 60 61/* Try to keep the definitions from running away on their own. */ 62#if (MMIX_EH_RETURN_DATA_REGNO_START \ 63 != MMIX_RESERVED_GNU_ARG_0_REGNUM + MMIX_MAX_ARGS_IN_REGS) 64 #error MMIX register definition inconsistency 65#endif 66 67#if (MMIX_MAX_REGS_FOR_VALUE + MMIX_MAX_ARGS_IN_REGS > 32) 68 #error MMIX parameters and return values bad, more than 32 registers 69#endif 70 71/* This chosen as "a call-clobbered hard register that is otherwise 72 untouched by the epilogue". */ 73#define MMIX_EH_RETURN_STACKADJ_REGNUM MMIX_STATIC_CHAIN_REGNUM 74 75#ifdef REG_OK_STRICT 76# define MMIX_REG_OK_STRICT 1 77#else 78# define MMIX_REG_OK_STRICT 0 79#endif 80 81#define MMIX_FUNCTION_ARG_SIZE(MODE, TYPE) \ 82 ((MODE) != BLKmode ? GET_MODE_SIZE (MODE) : int_size_in_bytes (TYPE)) 83 84/* Declarations for helper variables that are not tied to a particular 85 target macro. */ 86extern GTY(()) rtx mmix_compare_op0; 87extern GTY(()) rtx mmix_compare_op1; 88 89/* Per-function machine data. This is normally an opaque type just 90 defined and used in the tm.c file, but we need to see the definition in 91 mmix.md too. */ 92struct machine_function GTY(()) 93 { 94 int has_landing_pad; 95 int highest_saved_stack_register; 96 int in_prologue; 97 }; 98 99/* For these target macros, there is no generic documentation here. You 100 should read `Using and Porting GCC' for that. Only comments specific 101 to the MMIX target are here. 102 103 There are however references to the specific texinfo node (comments 104 with "Node:"), so there should be little or nothing amiss. Probably 105 the opposite, since we don't have to care about old littering and 106 soon outdated generic comments. */ 107 108/* Node: Driver */ 109 110/* User symbols are in the same name-space as built-in symbols, but we 111 don't need the built-in symbols, so remove those and instead apply 112 stricter operand checking. Don't warn when expanding insns. */ 113#define ASM_SPEC "-no-predefined-syms -x" 114 115/* Pass on -mset-program-start=N and -mset-data-start=M to the linker. 116 Provide default program start 0x100 unless -mno-set-program-start. 117 Don't do this if linking relocatably, with -r. For a final link, 118 produce mmo, unless ELF is requested or when linking relocatably. */ 119#define LINK_SPEC \ 120 "%{mset-program-start=*:--defsym __.MMIX.start..text=%*}\ 121 %{mset-data-start=*:--defsym __.MMIX.start..data=%*}\ 122 %{!mset-program-start=*:\ 123 %{!mno-set-program-start:\ 124 %{!r:--defsym __.MMIX.start..text=0x100}}}\ 125 %{!melf:%{!r:-m mmo}}%{melf|r:-m elf64mmix}" 126 127/* FIXME: There's no provision for profiling here. */ 128#define STARTFILE_SPEC \ 129 "crti%O%s crtbegin%O%s" 130 131#define ENDFILE_SPEC "crtend%O%s crtn%O%s" 132 133/* Node: Run-time Target */ 134 135/* Define __LONG_MAX__, since we're advised not to change glimits.h. */ 136#define TARGET_CPU_CPP_BUILTINS() \ 137 do \ 138 { \ 139 builtin_define ("__mmix__"); \ 140 builtin_define ("__MMIX__"); \ 141 if (TARGET_ABI_GNU) \ 142 builtin_define ("__MMIX_ABI_GNU__"); \ 143 else \ 144 builtin_define ("__MMIX_ABI_MMIXWARE__"); \ 145 } \ 146 while (0) 147 148extern int target_flags; 149 150#define TARGET_DEFAULT \ 151 (MASK_BRANCH_PREDICT | MASK_BASE_ADDRESSES | MASK_USE_RETURN_INSN) 152 153/* Unfortunately, this must not reference anything in "mmix.c". */ 154#define TARGET_VERSION \ 155 fprintf (stderr, " (MMIX)") 156 157#define OVERRIDE_OPTIONS mmix_override_options () 158 159#define OPTIMIZATION_OPTIONS(LEVEL, SIZE) \ 160 do \ 161 { \ 162 if (LEVEL >= 1) \ 163 flag_regmove = TRUE; \ 164 \ 165 if (SIZE || LEVEL > 1) \ 166 { \ 167 flag_omit_frame_pointer = TRUE; \ 168 } \ 169 } \ 170 while (0) 171 172/* This one will have to wait a little bit; right now we can't debug 173 neither with or without a frame-pointer. */ 174/* #define CAN_DEBUG_WITHOUT_FP */ 175 176 177/* Node: Per-Function Data */ 178#define INIT_EXPANDERS mmix_init_expanders () 179 180 181/* Node: Storage Layout */ 182/* I see no bit-field instructions. Anyway, the common order is from low 183 to high, as the power of two, hence little-endian. */ 184#define BITS_BIG_ENDIAN 0 185#define BYTES_BIG_ENDIAN 1 186#define WORDS_BIG_ENDIAN 1 187#define FLOAT_WORDS_BIG_ENDIAN 1 188#define UNITS_PER_WORD 8 189 190/* FIXME: Promotion of modes currently generates slow code, extending 191 before every operation. */ 192/* I'm a little bit undecided about this one. It might be beneficial to 193 promote all operations. */ 194 195#define PROMOTE_FUNCTION_MODE(MODE, UNSIGNEDP, TYPE) \ 196 do { \ 197 if (GET_MODE_CLASS (MODE) == MODE_INT \ 198 && GET_MODE_SIZE (MODE) < 8) \ 199 { \ 200 (MODE) = DImode; \ 201 /* Do the following some time later, \ 202 scrutinizing differences. */ \ 203 if (0) (UNSIGNEDP) = 0; \ 204 } \ 205 } while (0) 206 207/* We need to align everything to 64 bits that can affect the alignment 208 of other types. Since address N is interpreted in MMIX as (N modulo 209 access_size), we must align. */ 210#define PARM_BOUNDARY 64 211#define STACK_BOUNDARY 64 212#define FUNCTION_BOUNDARY 32 213#define BIGGEST_ALIGNMENT 64 214 215/* This one is only used in the ADA front end. */ 216#define MINIMUM_ATOMIC_ALIGNMENT 8 217 218/* Copied from elfos.h. */ 219#define MAX_OFILE_ALIGNMENT (32768 * 8) 220 221#define DATA_ALIGNMENT(TYPE, BASIC_ALIGN) \ 222 mmix_data_alignment (TYPE, BASIC_ALIGN) 223 224#define CONSTANT_ALIGNMENT(CONSTANT, BASIC_ALIGN) \ 225 mmix_constant_alignment (CONSTANT, BASIC_ALIGN) 226 227#define LOCAL_ALIGNMENT(TYPE, BASIC_ALIGN) \ 228 mmix_local_alignment (TYPE, BASIC_ALIGN) 229 230/* Following other ports, this seems to most commonly be the word-size, 231 so let's do that here too. */ 232#define EMPTY_FIELD_BOUNDARY 64 233 234/* We chose to have this low solely for similarity with the alpha. It has 235 nothing to do with passing the tests dg/c99-scope-2 and 236 execute/align-1.c. Nothing. Though the tests seem wrong. Padding of 237 the structure is automatically added to get alignment when needed if we 238 set this to just byte-boundary. */ 239#define STRUCTURE_SIZE_BOUNDARY 8 240 241/* The lower bits are ignored. */ 242#define STRICT_ALIGNMENT 1 243 244 245/* Node: Type Layout */ 246 247/* It might seem more natural to have 64-bit ints on a 64-bit machine, 248 but then an occasional MMIX programmer needs to know how to put a lot 249 of __attribute__ stuff to get to the 8, 16 and 32-bit modes rather 250 than the "intuitive" char, short and int types. */ 251#define INT_TYPE_SIZE 32 252#define SHORT_TYPE_SIZE 16 253#define LONG_LONG_TYPE_SIZE 64 254 255#define FLOAT_TYPE_SIZE 32 256#define DOUBLE_TYPE_SIZE 64 257#define LONG_DOUBLE_TYPE_SIZE 64 258 259#define DEFAULT_SIGNED_CHAR 1 260 261 262/* Node: Register Basics */ 263/* We tell GCC about all 256 general registers, and we also include 264 rD, rE, rH, rJ, rR and rO (in that order) so we can describe what insns 265 clobber them. We use a faked register for the argument pointer. It is 266 always eliminated towards the frame-pointer or the stack-pointer, never 267 output in assembly. Any fixed register would do for this, like $255, 268 but future debugging is easier when using a separate register. It 269 counts as a global register for pseudorandom reasons. */ 270#define FIRST_PSEUDO_REGISTER 263 271 272/* We treat general registers with no assigned purpose as fixed. The 273 stack pointer, $254, is also fixed. Register $255 is referred to as a 274 temporary register in the MMIX papers, and used as such in mmixal, so 275 it should not be used as a stack pointer. We set it to fixed, and use 276 it "manually" at times of despair. */ 277#define FIXED_REGISTERS \ 278 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 279 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \ 280 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 281 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 282 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 283 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 284 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 285 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 286 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 287 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 288 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 289 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 290 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 291 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 292 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 293 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, \ 294 1, 1, 0, 0, 0, 1, 1 \ 295 } 296 297/* General registers are fixed and therefore "historically" marked 298 call-used. (FIXME: This has changed). Registers $15..$31 are 299 call-clobbered; we'll put arguments in $16 and up, and we need $15 for 300 the MMIX register-stack "hole". */ 301#define CALL_USED_REGISTERS \ 302 { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, \ 303 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 304 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 305 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 306 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 307 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 308 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 309 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 310 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 311 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 312 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 313 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 314 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 315 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 316 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \ 317 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, \ 318 1, 1, 1, 1, 1, 1, 1 \ 319 } 320 321#define CONDITIONAL_REGISTER_USAGE mmix_conditional_register_usage () 322 323/* No INCOMING_REGNO or OUTGOING_REGNO, since those macros are not usable 324 for MMIX: it doesn't have a fixed register window size. FIXME: Perhaps 325 we should say something about $0..$15 may sometimes be the incoming 326 $16..$31. Those macros need better documentation; it looks like 327 they're just bogus and that FUNCTION_INCOMING_ARG_REGNO_P and 328 FUNCTION_OUTGOING_VALUE should be used where they're used. For the 329 moment, do nothing; things seem to work anyway. */ 330 331/* Defining LOCAL_REGNO is necessary in presence of prologue/epilogue, 332 else GCC will be confused that those registers aren't saved and 333 restored. */ 334#define LOCAL_REGNO(REGNO) mmix_local_regno (REGNO) 335 336/* Node: Allocation Order */ 337 338/* We should allocate registers from 0 to 31 by increasing number, because 339 I think that's what people expect. Beyond that, just use 340 call-clobbered global registers first, then call-clobbered special 341 registers. Last, the fixed registers. */ 342#define MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER \ 343 { 0, 1, 2, 3, 4, 5, 6, 7, \ 344 8, 9, 10, 11, 12, 13, 14, 15, \ 345 16, 17, 18, 19, 20, 21, 22, 23, \ 346 24, 25, 26, 27, 28, 29, 30, 31, \ 347 \ 348 252, 251, 250, 249, 248, 247, \ 349 \ 350 253, \ 351 \ 352 258, 260, 259, \ 353 \ 354 32, 33, 34, 35, 36, 37, 38, 39, \ 355 40, 41, 42, 43, 44, 45, 46, 47, \ 356 48, 49, 50, 51, 52, 53, 54, 55, \ 357 56, 57, 58, 59, 60, 61, 62, 63, \ 358 64, 65, 66, 67, 68, 69, 70, 71, \ 359 72, 73, 74, 75, 76, 77, 78, 79, \ 360 80, 81, 82, 83, 84, 85, 86, 87, \ 361 88, 89, 90, 91, 92, 93, 94, 95, \ 362 96, 97, 98, 99, 100, 101, 102, 103, \ 363 104, 105, 106, 107, 108, 109, 110, 111, \ 364 112, 113, 114, 115, 116, 117, 118, 119, \ 365 120, 121, 122, 123, 124, 125, 126, 127, \ 366 128, 129, 130, 131, 132, 133, 134, 135, \ 367 136, 137, 138, 139, 140, 141, 142, 143, \ 368 144, 145, 146, 147, 148, 149, 150, 151, \ 369 152, 153, 154, 155, 156, 157, 158, 159, \ 370 160, 161, 162, 163, 164, 165, 166, 167, \ 371 168, 169, 170, 171, 172, 173, 174, 175, \ 372 176, 177, 178, 179, 180, 181, 182, 183, \ 373 184, 185, 186, 187, 188, 189, 190, 191, \ 374 192, 193, 194, 195, 196, 197, 198, 199, \ 375 200, 201, 202, 203, 204, 205, 206, 207, \ 376 208, 209, 210, 211, 212, 213, 214, 215, \ 377 216, 217, 218, 219, 220, 221, 222, 223, \ 378 224, 225, 226, 227, 228, 229, 230, 231, \ 379 232, 233, 234, 235, 236, 237, 238, 239, \ 380 240, 241, 242, 243, 244, 245, 246, \ 381 \ 382 254, 255, 256, 257, 261, 262 \ 383 } 384 385/* As a convenience, we put this nearby, for ease of comparison. 386 First, call-clobbered registers in reverse order of assignment as 387 parameters (also the top ones; not because they're parameters, but 388 for continuity). 389 390 Second, saved registers that go on the register-stack. 391 392 Third, special registers rH, rR and rJ. They should not normally be 393 allocated, but since they're call-clobbered, it is cheaper to use one 394 of them than using a call-saved register for a call-clobbered use, 395 assuming it is referenced a very limited number of times. Other global 396 and fixed registers come next; they are never allocated. */ 397#define MMIX_GNU_ABI_REG_ALLOC_ORDER \ 398 { 252, 251, 250, 249, 248, 247, 246, \ 399 245, 244, 243, 242, 241, 240, 239, 238, \ 400 237, 236, 235, 234, 233, 232, 231, \ 401 \ 402 0, 1, 2, 3, 4, 5, 6, 7, \ 403 8, 9, 10, 11, 12, 13, 14, 15, \ 404 16, 17, 18, 19, 20, 21, 22, 23, \ 405 24, 25, 26, 27, 28, 29, 30, 31, \ 406 \ 407 253, \ 408 \ 409 258, 260, 259, \ 410 \ 411 32, 33, 34, 35, 36, 37, 38, 39, \ 412 40, 41, 42, 43, 44, 45, 46, 47, \ 413 48, 49, 50, 51, 52, 53, 54, 55, \ 414 56, 57, 58, 59, 60, 61, 62, 63, \ 415 64, 65, 66, 67, 68, 69, 70, 71, \ 416 72, 73, 74, 75, 76, 77, 78, 79, \ 417 80, 81, 82, 83, 84, 85, 86, 87, \ 418 88, 89, 90, 91, 92, 93, 94, 95, \ 419 96, 97, 98, 99, 100, 101, 102, 103, \ 420 104, 105, 106, 107, 108, 109, 110, 111, \ 421 112, 113, 114, 115, 116, 117, 118, 119, \ 422 120, 121, 122, 123, 124, 125, 126, 127, \ 423 128, 129, 130, 131, 132, 133, 134, 135, \ 424 136, 137, 138, 139, 140, 141, 142, 143, \ 425 144, 145, 146, 147, 148, 149, 150, 151, \ 426 152, 153, 154, 155, 156, 157, 158, 159, \ 427 160, 161, 162, 163, 164, 165, 166, 167, \ 428 168, 169, 170, 171, 172, 173, 174, 175, \ 429 176, 177, 178, 179, 180, 181, 182, 183, \ 430 184, 185, 186, 187, 188, 189, 190, 191, \ 431 192, 193, 194, 195, 196, 197, 198, 199, \ 432 200, 201, 202, 203, 204, 205, 206, 207, \ 433 208, 209, 210, 211, 212, 213, 214, 215, \ 434 216, 217, 218, 219, 220, 221, 222, 223, \ 435 224, 225, 226, 227, 228, 229, 230, \ 436 \ 437 254, 255, 256, 257, 261, 262 \ 438 } 439 440/* The default one. */ 441#define REG_ALLOC_ORDER MMIX_MMIXWARE_ABI_REG_ALLOC_ORDER 442 443/* Node: Values in Registers */ 444 445#define HARD_REGNO_NREGS(REGNO, MODE) \ 446 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) \ 447 / UNITS_PER_WORD) 448 449#define HARD_REGNO_MODE_OK(REGNO, MODE) 1 450 451/* Note that no register can really be accessed in single-float mode, so 452 we *can* say 1 here. FIXME: Will TRT happen for single-float, or do 453 we have to punt to libgcc1.asm? */ 454#define MODES_TIEABLE_P(MODE1, MODE2) 1 455 456 457/* Node: Leaf Functions */ 458/* (empty) */ 459 460 461/* Node: Register Classes */ 462 463enum reg_class 464 { 465 NO_REGS, GENERAL_REGS, REMAINDER_REG, HIMULT_REG, 466 SYSTEM_REGS, ALL_REGS, LIM_REG_CLASSES 467 }; 468 469#define N_REG_CLASSES (int) LIM_REG_CLASSES 470 471#define REG_CLASS_NAMES \ 472 {"NO_REGS", "GENERAL_REGS", "REMAINDER_REG", "HIMULT_REG", \ 473 "SYSTEM_REGS", "ALL_REGS"} 474 475/* Note that the contents of each item is always 32 bits. */ 476#define REG_CLASS_CONTENTS \ 477 {{0, 0, 0, 0, 0, 0, 0, 0, 0}, \ 478 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x20}, \ 479 {0, 0, 0, 0, 0, 0, 0, 0, 0x10}, \ 480 {0, 0, 0, 0, 0, 0, 0, 0, 4}, \ 481 {0, 0, 0, 0, 0, 0, 0, 0, 0x7f}, \ 482 {~0, ~0, ~0, ~0, ~0, ~0, ~0, ~0, 0x7f}} 483 484#define REGNO_REG_CLASS(REGNO) \ 485 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \ 486 || (REGNO) == MMIX_ARG_POINTER_REGNUM \ 487 ? GENERAL_REGS \ 488 : (REGNO) == MMIX_REMAINDER_REGNUM ? REMAINDER_REG \ 489 : (REGNO) == MMIX_HIMULT_REGNUM ? HIMULT_REG : SYSTEM_REGS) 490 491#define BASE_REG_CLASS GENERAL_REGS 492 493#define INDEX_REG_CLASS GENERAL_REGS 494 495#define REG_CLASS_FROM_LETTER(CHAR) \ 496 ((CHAR) == 'x' ? SYSTEM_REGS \ 497 : (CHAR) == 'y' ? REMAINDER_REG \ 498 : (CHAR) == 'z' ? HIMULT_REG : NO_REGS) 499 500#define REGNO_OK_FOR_BASE_P(REGNO) \ 501 ((REGNO) <= MMIX_LAST_GENERAL_REGISTER \ 502 || (REGNO) == MMIX_ARG_POINTER_REGNUM \ 503 || (reg_renumber[REGNO] > 0 \ 504 && reg_renumber[REGNO] <= MMIX_LAST_GENERAL_REGISTER)) 505 506#define REGNO_OK_FOR_INDEX_P(REGNO) REGNO_OK_FOR_BASE_P (REGNO) 507 508#define PREFERRED_RELOAD_CLASS(X, CLASS) \ 509 mmix_preferred_reload_class (X, CLASS) 510 511#define PREFERRED_OUTPUT_RELOAD_CLASS(X, CLASS) \ 512 mmix_preferred_output_reload_class (X, CLASS) 513 514#define SECONDARY_INPUT_RELOAD_CLASS(CLASS, MODE, X) \ 515 mmix_secondary_reload_class (CLASS, MODE, X, 1) 516 517#define SECONDARY_OUTPUT_RELOAD_CLASS(CLASS, MODE, X) \ 518 mmix_secondary_reload_class (CLASS, MODE, X, 0) 519 520#define CLASS_MAX_NREGS(CLASS, MODE) HARD_REGNO_NREGS (CLASS, MODE) 521 522#define CONST_OK_FOR_LETTER_P(VALUE, C) \ 523 mmix_const_ok_for_letter_p (VALUE, C) 524 525#define EXTRA_CONSTRAINT(VALUE, C) \ 526 mmix_extra_constraint (VALUE, C, MMIX_REG_OK_STRICT) 527 528/* Do we need anything serious here? Yes, any FLOT constant. */ 529#define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \ 530 mmix_const_double_ok_for_letter_p (VALUE, C) 531 532 533/* Node: Frame Layout */ 534 535#define STACK_GROWS_DOWNWARD 536#define FRAME_GROWS_DOWNWARD 1 537 538#define STARTING_FRAME_OFFSET \ 539 mmix_starting_frame_offset () 540 541#define FIRST_PARM_OFFSET(FUNDECL) 0 542 543#define DYNAMIC_CHAIN_ADDRESS(FRAMEADDR) \ 544 mmix_dynamic_chain_address (FRAMEADDR) 545 546/* FIXME: It seems RETURN_ADDR_OFFSET is undocumented. */ 547 548#define SETUP_FRAME_ADDRESSES() \ 549 mmix_setup_frame_addresses () 550 551#define RETURN_ADDR_RTX(COUNT, FRAME) \ 552 mmix_return_addr_rtx (COUNT, FRAME) 553 554/* It's in rJ before we store it somewhere. */ 555#define INCOMING_RETURN_ADDR_RTX \ 556 gen_rtx_REG (Pmode, MMIX_INCOMING_RETURN_ADDRESS_REGNUM) 557 558/* FIXME: This does not seem properly documented or cross-indexed. 559 Nowhere except in the code does it say it *has* to be in the range 560 0..255, or else it will be truncated. That goes for the default too. */ 561#define DWARF_FRAME_RETURN_COLUMN \ 562 DWARF_FRAME_REGNUM (MMIX_INCOMING_RETURN_ADDRESS_REGNUM) 563 564/* No return address is stored there. */ 565#define INCOMING_FRAME_SP_OFFSET 0 566 567/* Node: Stack Checking */ 568/* (empty) */ 569 570 571/* Node: Exception Handling */ 572 573#define EH_RETURN_DATA_REGNO(N) \ 574 mmix_eh_return_data_regno (N) 575 576#define EH_RETURN_STACKADJ_RTX \ 577 mmix_eh_return_stackadj_rtx () 578 579#define EH_RETURN_HANDLER_RTX \ 580 mmix_eh_return_handler_rtx () 581 582#define ASM_PREFERRED_EH_DATA_FORMAT(CODE, GLOBAL) \ 583 mmix_asm_preferred_eh_data_format (CODE, GLOBAL) 584 585/* Node: Frame Registers */ 586#define STACK_POINTER_REGNUM MMIX_STACK_POINTER_REGNUM 587 588/* Perhaps we can use HARD_FRAME_POINTER_REGNUM and decide later on 589 what register we want to use. */ 590#define FRAME_POINTER_REGNUM MMIX_FRAME_POINTER_REGNUM 591#define ARG_POINTER_REGNUM MMIX_ARG_POINTER_REGNUM 592 593#define STATIC_CHAIN_REGNUM MMIX_STATIC_CHAIN_REGNUM 594 595 596/* Node: Elimination */ 597/* FIXME: Is this requirement built-in? Anyway, we should try to get rid 598 of it; we can deduce the value. */ 599#define FRAME_POINTER_REQUIRED current_function_has_nonlocal_label 600 601/* The frame-pointer is stored in a location that either counts to the 602 offset of incoming parameters, or that counts to the offset of the 603 frame, so we can't use a single offset. We therefore eliminate those 604 two separately. */ 605#define ELIMINABLE_REGS \ 606 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \ 607 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \ 608 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} 609 610/* We need not worry about when the frame-pointer is required for other 611 reasons; GCC takes care of those cases. */ 612#define CAN_ELIMINATE(FROM, TO) 1 613 614#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 615 (OFFSET) = mmix_initial_elimination_offset (FROM, TO) 616 617 618/* Node: Stack Arguments */ 619 620#define ACCUMULATE_OUTGOING_ARGS 1 621 622#define RETURN_POPS_ARGS(FUNDECL, FUNTYPE, STACKSIZE) 0 623 624 625/* Node: Register Arguments */ 626#define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ 627 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 0) 628 629#define FUNCTION_INCOMING_ARG(CUM, MODE, TYPE, NAMED) \ 630 mmix_function_arg (&(CUM), MODE, TYPE, NAMED, 1) 631 632typedef struct { int regs; int lib; } CUMULATIVE_ARGS; 633 634#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \ 635 ((CUM).regs = 0, (CUM).lib = ((LIBNAME) != 0)) 636 637#define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ 638 ((CUM).regs \ 639 = ((targetm.calls.must_pass_in_stack (MODE, TYPE)) \ 640 || (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE) > 8 \ 641 && !TARGET_LIBFUNC && !(CUM).lib)) \ 642 ? (MMIX_MAX_ARGS_IN_REGS) + 1 \ 643 : (CUM).regs + (7 + (MMIX_FUNCTION_ARG_SIZE (MODE, TYPE))) / 8) 644 645#define FUNCTION_ARG_REGNO_P(REGNO) \ 646 mmix_function_arg_regno_p (REGNO, 0) 647 648#define FUNCTION_INCOMING_ARG_REGNO_P(REGNO) \ 649 mmix_function_arg_regno_p (REGNO, 1) 650 651 652/* Node: Register Arguments */ 653 654#define FUNCTION_VALUE(VALTYPE, FUNC) \ 655 gen_rtx_REG (TYPE_MODE (VALTYPE), MMIX_RETURN_VALUE_REGNUM) 656 657/* This needs to take care of the register hole for complex return values. */ 658#define FUNCTION_OUTGOING_VALUE(VALTYPE, FUNC) \ 659 mmix_function_outgoing_value (VALTYPE, FUNC) 660 661#define LIBCALL_VALUE(MODE) \ 662 gen_rtx_REG (MODE, MMIX_RETURN_VALUE_REGNUM) 663 664#define FUNCTION_VALUE_REGNO_P(REGNO) \ 665 mmix_function_value_regno_p (REGNO) 666 667 668/* Node: Caller Saves */ 669/* (empty) */ 670 671 672/* Node: Function Entry */ 673 674/* See mmix.c for TARGET_ASM_FUNCTION_PROLOGUE and 675 TARGET_ASM_FUNCTION_EPILOGUE. */ 676 677/* We need to say that the epilogue uses the return address, so the 678 initial-value machinery restores it. FIXME: Some targets 679 conditionalize on "reload_completed &&". Investigate difference. 680 FIXME: Not needed if nonlocal_goto_stack_level. */ 681#define EPILOGUE_USES(REGNO) \ 682 ((REGNO) == MMIX_INCOMING_RETURN_ADDRESS_REGNUM) 683 684/* Node: Profiling */ 685#define FUNCTION_PROFILER(FILE, LABELNO) \ 686 mmix_function_profiler (FILE, LABELNO) 687 688/* Node: Trampolines */ 689 690#define TRAMPOLINE_TEMPLATE(FILE) \ 691 mmix_trampoline_template (FILE) 692 693#define TRAMPOLINE_SIZE mmix_trampoline_size 694#define INITIALIZE_TRAMPOLINE(ADDR, FNADDR, STATIC_CHAIN) \ 695 mmix_initialize_trampoline (ADDR, FNADDR, STATIC_CHAIN) 696 697 698/* Node: Addressing Modes */ 699 700#define CONSTANT_ADDRESS_P(X) \ 701 mmix_constant_address_p (X) 702 703#define MAX_REGS_PER_ADDRESS 2 704 705#define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL) \ 706 if (mmix_legitimate_address (MODE, X, MMIX_REG_OK_STRICT)) \ 707 goto LABEL 708 709#ifndef REG_OK_STRICT 710# define REG_OK_FOR_BASE_P(X) \ 711 (REGNO (X) <= MMIX_LAST_GENERAL_REGISTER \ 712 || REGNO (X) == MMIX_ARG_POINTER_REGNUM \ 713 || REGNO (X) >= FIRST_PSEUDO_REGISTER) 714#else 715# define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X)) 716#endif /* REG_OK_STRICT */ 717 718#define REG_OK_FOR_INDEX_P(X) REG_OK_FOR_BASE_P (X) 719 720#define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) 721 722#define LEGITIMATE_CONSTANT_P(X) \ 723 mmix_legitimate_constant_p (X) 724 725 726/* Node: Condition Code */ 727 728#define SELECT_CC_MODE(OP, X, Y) \ 729 mmix_select_cc_mode (OP, X, Y) 730 731/* A definition of CANONICALIZE_COMPARISON that changed LE and GT 732 comparisons with -1 to LT and GE respectively, and LT, LTU, GE or GEU 733 comparisons with 256 to 255 and LE, LEU, GT and GTU has been 734 ineffective; the code path for performing the changes did not trig for 735 neither the GCC testsuite nor ghostscript-6.52 nor Knuth's mmix.tar.gz 736 itself (core GCC functionality supposedly handling it) with sources 737 from 2002-06-06. */ 738 739#define REVERSIBLE_CC_MODE(MODE) \ 740 mmix_reversible_cc_mode (MODE) 741 742 743/* Node: Costs */ 744 745/* The special registers can only move to and from general regs, and we 746 need to check that their constraints match, so say 3 for them. */ 747/* WARNING: gcc-2.7.2.2 i686-pc-linux-gnulibc1 (as shipped with RH 4.2) 748 miscompiles reload1.c:reload_cse_simplify_set; a call to 749 reload_cse_regno_equal_p is missing when checking if a substitution of 750 a register setting is valid if this is defined to just the expression 751 in mmix_register_move_cost. 752 753 Symptom: a (all?) register setting is optimized away for e.g. 754 "char *p1(char *p) { return p+1; }" and the value of register zero ($0) 755 is returned. 756 757 We can workaround by making this a function call - unknown if this 758 causes dire speed effects. */ 759#define REGISTER_MOVE_COST(MODE, FROM, TO) \ 760 mmix_register_move_cost (MODE, FROM, TO) 761 762#define SLOW_BYTE_ACCESS 0 763 764 765/* Node: Sections */ 766 767/* This must be a constant string, since it's used in crtstuff.c. */ 768#define TEXT_SECTION_ASM_OP \ 769 "\t.text ! mmixal:= 9H LOC 8B" 770 771/* FIXME: Not documented. */ 772#define DATA_SECTION_ASM_OP \ 773 mmix_data_section_asm_op () 774 775#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata" 776 777/* Node: PIC */ 778/* (empty) */ 779 780 781/* Node: File Framework */ 782 783/* While any other punctuation character but ";" would do, we prefer "%" 784 or "!"; "!" is an unary operator and so will not be mistakenly included 785 in correctly formed expressions. The hash character adds mass; catches 786 the eye. We can't have it as a comment char by itself, since it's a 787 hex-number prefix. */ 788#define ASM_COMMENT_START "!#" 789 790/* These aren't currently functional. We just keep them as markers. */ 791#define ASM_APP_ON "%APP\n" 792#define ASM_APP_OFF "%NO_APP\n" 793 794#define ASM_OUTPUT_SOURCE_FILENAME(STREAM, NAME) \ 795 mmix_asm_output_source_filename (STREAM, NAME) 796 797#define OUTPUT_QUOTED_STRING(STREAM, STRING) \ 798 mmix_output_quoted_string (STREAM, STRING, strlen (STRING)) 799 800#define TARGET_ASM_NAMED_SECTION default_elf_asm_named_section 801 802/* Node: Data Output */ 803 804#define ASM_OUTPUT_ASCII(STREAM, PTR, LEN) \ 805 mmix_asm_output_ascii (STREAM, PTR, LEN) 806 807/* Node: Uninitialized Data */ 808 809#define ASM_OUTPUT_ALIGNED_COMMON(ST, N, S, A) \ 810 mmix_asm_output_aligned_common (ST, N, S, A) 811 812#define ASM_OUTPUT_ALIGNED_LOCAL(ST, N, S, A) \ 813 mmix_asm_output_aligned_local (ST, N, S, A) 814 815 816/* Node: Label Output */ 817 818#define ASM_OUTPUT_LABEL(STREAM, NAME) \ 819 mmix_asm_output_label (STREAM, NAME) 820 821#define ASM_OUTPUT_INTERNAL_LABEL(STREAM, NAME) \ 822 mmix_asm_output_internal_label (STREAM, NAME) 823 824#define ASM_DECLARE_REGISTER_GLOBAL(STREAM, DECL, REGNO, NAME) \ 825 mmix_asm_declare_register_global (STREAM, DECL, REGNO, NAME) 826 827#define GLOBAL_ASM_OP "\t.global " 828 829#define ASM_WEAKEN_LABEL(STREAM, NAME) \ 830 mmix_asm_weaken_label (STREAM, NAME) 831 832#define MAKE_DECL_ONE_ONLY(DECL) \ 833 mmix_make_decl_one_only (DECL) 834 835#define ASM_OUTPUT_LABELREF(STREAM, NAME) \ 836 mmix_asm_output_labelref (STREAM, NAME) 837 838/* We insert a ":" to disambiguate against user symbols like L5. */ 839#define ASM_GENERATE_INTERNAL_LABEL(LABEL, PREFIX, NUM) \ 840 sprintf (LABEL, "*%s:%ld", PREFIX, (long)(NUM)) 841 842/* Insert "::"; these are rarer than internal labels. FIXME: Make sure no 843 ":" is seen in the object file; we don't really want that mmixal 844 feature visible there. We don't want the default, which uses a dot; 845 that'd be incompatible with mmixal. */ 846#define ASM_PN_FORMAT "%s::%lu" 847 848#define ASM_OUTPUT_DEF(STREAM, NAME, VALUE) \ 849 mmix_asm_output_def (STREAM, NAME, VALUE) 850 851/* Node: Macros for Initialization */ 852/* We're compiling to ELF and linking to MMO; fundamental ELF features 853 that GCC depend on are there. */ 854 855/* These must be constant strings, since they're used in crtstuff.c. */ 856#define INIT_SECTION_ASM_OP "\t.section .init,\"ax\" ! mmixal-incompatible" 857 858#define FINI_SECTION_ASM_OP "\t.section .fini,\"ax\" ! mmixal-incompatible" 859 860#define OBJECT_FORMAT_ELF 861 862 863/* Node: Instruction Output */ 864 865/* The non-$ register names must be prefixed with ":", since they're 866 affected by PREFIX. We provide the non-colon names as additional 867 names. */ 868#define REGISTER_NAMES \ 869 {"$0", "$1", "$2", "$3", "$4", "$5", "$6", "$7", \ 870 "$8", "$9", "$10", "$11", "$12", "$13", "$14", "$15", \ 871 "$16", "$17", "$18", "$19", "$20", "$21", "$22", "$23", \ 872 "$24", "$25", "$26", "$27", "$28", "$29", "$30", "$31", \ 873 "$32", "$33", "$34", "$35", "$36", "$37", "$38", "$39", \ 874 "$40", "$41", "$42", "$43", "$44", "$45", "$46", "$47", \ 875 "$48", "$49", "$50", "$51", "$52", "$53", "$54", "$55", \ 876 "$56", "$57", "$58", "$59", "$60", "$61", "$62", "$63", \ 877 "$64", "$65", "$66", "$67", "$68", "$69", "$70", "$71", \ 878 "$72", "$73", "$74", "$75", "$76", "$77", "$78", "$79", \ 879 "$80", "$81", "$82", "$83", "$84", "$85", "$86", "$87", \ 880 "$88", "$89", "$90", "$91", "$92", "$93", "$94", "$95", \ 881 "$96", "$97", "$98", "$99", "$100", "$101", "$102", "$103", \ 882 "$104", "$105", "$106", "$107", "$108", "$109", "$110", "$111", \ 883 "$112", "$113", "$114", "$115", "$116", "$117", "$118", "$119", \ 884 "$120", "$121", "$122", "$123", "$124", "$125", "$126", "$127", \ 885 "$128", "$129", "$130", "$131", "$132", "$133", "$134", "$135", \ 886 "$136", "$137", "$138", "$139", "$140", "$141", "$142", "$143", \ 887 "$144", "$145", "$146", "$147", "$148", "$149", "$150", "$151", \ 888 "$152", "$153", "$154", "$155", "$156", "$157", "$158", "$159", \ 889 "$160", "$161", "$162", "$163", "$164", "$165", "$166", "$167", \ 890 "$168", "$169", "$170", "$171", "$172", "$173", "$174", "$175", \ 891 "$176", "$177", "$178", "$179", "$180", "$181", "$182", "$183", \ 892 "$184", "$185", "$186", "$187", "$188", "$189", "$190", "$191", \ 893 "$192", "$193", "$194", "$195", "$196", "$197", "$198", "$199", \ 894 "$200", "$201", "$202", "$203", "$204", "$205", "$206", "$207", \ 895 "$208", "$209", "$210", "$211", "$212", "$213", "$214", "$215", \ 896 "$216", "$217", "$218", "$219", "$220", "$221", "$222", "$223", \ 897 "$224", "$225", "$226", "$227", "$228", "$229", "$230", "$231", \ 898 "$232", "$233", "$234", "$235", "$236", "$237", "$238", "$239", \ 899 "$240", "$241", "$242", "$243", "$244", "$245", "$246", "$247", \ 900 "$248", "$249", "$250", "$251", "$252", "$253", "$254", "$255", \ 901 ":rD", ":rE", ":rH", ":rJ", ":rR", "ap_!BAD!", ":rO"} 902 903#define ADDITIONAL_REGISTER_NAMES \ 904 {{"sp", 254}, {":sp", 254}, {"rD", 256}, {"rE", 257}, \ 905 {"rH", 258}, {"rJ", MMIX_rJ_REGNUM}, {"rO", MMIX_rO_REGNUM}} 906 907#define PRINT_OPERAND(STREAM, X, CODE) \ 908 mmix_print_operand (STREAM, X, CODE) 909 910#define PRINT_OPERAND_PUNCT_VALID_P(CODE) \ 911 mmix_print_operand_punct_valid_p (CODE) 912 913#define PRINT_OPERAND_ADDRESS(STREAM, X) \ 914 mmix_print_operand_address (STREAM, X) 915 916#define ASM_OUTPUT_REG_PUSH(STREAM, REGNO) \ 917 mmix_asm_output_reg_push (STREAM, REGNO) 918 919#define ASM_OUTPUT_REG_POP(STREAM, REGNO) \ 920 mmix_asm_output_reg_pop (STREAM, REGNO) 921 922 923/* Node: Dispatch Tables */ 924 925/* We define both types, since SImode is the better, but DImode the only 926 possible for mmixal so that's the one actually used. */ 927#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \ 928 mmix_asm_output_addr_diff_elt (STREAM, BODY, VALUE, REL) 929 930#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \ 931 mmix_asm_output_addr_vec_elt (STREAM, VALUE) 932 933 934/* Node: Exception Region Output */ 935/* (empty) */ 936 937/* Node: Alignment Output */ 938 939#define ASM_OUTPUT_SKIP(STREAM, NBYTES) \ 940 mmix_asm_output_skip (STREAM, NBYTES) 941 942#define ASM_OUTPUT_ALIGN(STREAM, POWER) \ 943 mmix_asm_output_align (STREAM, POWER) 944 945 946/* Node: All Debuggers */ 947 948#define DBX_REGISTER_NUMBER(REGNO) \ 949 mmix_dbx_register_number (REGNO) 950 951 952/* Node: DBX Options */ 953/* (empty) */ 954/* Node: DBX Hooks */ 955/* (empty) */ 956/* Node: File Names and DBX */ 957/* (empty) */ 958 959 960/* Node: SDB and DWARF */ 961#define DWARF2_DEBUGGING_INFO 1 962#define DWARF2_ASM_LINE_DEBUG_INFO 1 963 964/* Node: Misc */ 965 966/* There's no way to get a PC-relative offset into tables for SImode, so 967 for the moment we have absolute entries in DImode. 968 When we're going ELF, these should be SImode and 1. */ 969#define CASE_VECTOR_MODE DImode 970#define CASE_VECTOR_PC_RELATIVE 0 971 972#define WORD_REGISTER_OPERATIONS 973 974/* We have a choice, which makes this yet another parameter to tweak. The 975 gut feeling is currently that SIGN_EXTEND wins; "int" is more frequent 976 than "unsigned int", and we have signed characters. FIXME: measure. */ 977#define LOAD_EXTEND_OP(MODE) (TARGET_ZERO_EXTEND ? ZERO_EXTEND : SIGN_EXTEND) 978 979#define MOVE_MAX 8 980 981#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 982 983/* ??? MMIX allows a choice of STORE_FLAG_VALUE. Revisit later, 984 we don't have scc expanders yet. */ 985 986#define Pmode DImode 987 988#define FUNCTION_MODE QImode 989 990#define NO_IMPLICIT_EXTERN_C 991 992#define HANDLE_SYSV_PRAGMA 1 993 994/* These are checked. */ 995#define DOLLARS_IN_IDENTIFIERS 0 996#define NO_DOLLAR_IN_LABEL 997#define NO_DOT_IN_LABEL 998 999#endif /* GCC_MMIX_H */ 1000/* 1001 * Local variables: 1002 * eval: (c-set-style "gnu") 1003 * indent-tabs-mode: t 1004 * End: 1005 */ 1006