1 /* Definitions of target machine for GNU compiler, Lattice Mico32 architecture. 2 Contributed by Jon Beniston <jon@beniston.com> 3 4 Copyright (C) 2009, 2010 Free Software Foundation, Inc. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it 9 under the terms of the GNU General Public License as published 10 by the Free Software Foundation; either version 3, or (at your 11 option) any later version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 15 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public 16 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 /*-------------------------------*/ 23 /* Run-time Target Specification */ 24 /*-------------------------------*/ 25 26 /* Print subsidiary information on the compiler version in use. */ 27 #ifndef TARGET_VERSION 28 #define TARGET_VERSION fprintf (stderr, " (LatticeMico32)") 29 #endif 30 31 /* Target CPU builtins. */ 32 #define TARGET_CPU_CPP_BUILTINS() \ 33 do \ 34 { \ 35 builtin_define ("__lm32__"); \ 36 builtin_assert ("cpu=lm32"); \ 37 builtin_assert ("machine=lm32"); \ 38 if (TARGET_MULTIPLY_ENABLED) \ 39 builtin_define ("__multiply_enabled__"); \ 40 if (TARGET_DIVIDE_ENABLED) \ 41 builtin_define ("__divide_enabled__"); \ 42 if (TARGET_BARREL_SHIFT_ENABLED) \ 43 builtin_define ("__barrel_shift_enabled__"); \ 44 if (TARGET_SIGN_EXTEND_ENABLED) \ 45 builtin_define ("__sign_extend_enabled__"); \ 46 if (TARGET_USER_ENABLED) \ 47 builtin_define ("__user_enabled__"); \ 48 } \ 49 while (0) 50 51 #undef ASM_SPEC 52 #define ASM_SPEC "\ 53 %{mmultiply-enabled} \ 54 %{mdivide-enabled} \ 55 %{mbarrel-shift-enabled} \ 56 %{msign-extend-enabled} \ 57 %{muser-extend-enabled} \ 58 %{v} \ 59 " 60 61 /* Let link script define all link options. 62 Default to using simulator link script. */ 63 64 #undef STARTFILE_SPEC 65 #define STARTFILE_SPEC "" 66 #undef ENDFILE_SPEC 67 #define ENDFILE_SPEC "" 68 #undef LIB_SPEC 69 #define LIB_SPEC "%{!T*:-T sim.ld}" 70 71 #define OVERRIDE_OPTIONS lm32_override_options() 72 73 extern int target_flags; 74 75 /* Add -G xx support. */ 76 77 #undef SWITCH_TAKES_ARG 78 #define SWITCH_TAKES_ARG(CHAR) \ 79 (DEFAULT_SWITCH_TAKES_ARG (CHAR) || (CHAR) == 'G') 80 81 #undef CC1_SPEC 82 #define CC1_SPEC "%{G*}" 83 84 /*---------------------------------*/ 85 /* Target machine storage layout. */ 86 /*---------------------------------*/ 87 88 #define BITS_BIG_ENDIAN 0 89 #define BYTES_BIG_ENDIAN 1 90 #define WORDS_BIG_ENDIAN 1 91 #define LIBGCC2_WORDS_BIG_ENDIAN 1 92 93 #define BITS_PER_UNIT 8 94 #define BITS_PER_WORD 32 95 #define UNITS_PER_WORD 4 96 97 #define POINTER_SIZE 32 98 99 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 100 do { \ 101 if (GET_MODE_CLASS (MODE) == MODE_INT \ 102 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ 103 (MODE) = word_mode; \ 104 } while (0) 105 106 #define PARM_BOUNDARY 32 107 108 #define STACK_BOUNDARY 32 109 110 #define BIGGEST_ALIGNMENT 64 111 112 #define FUNCTION_BOUNDARY 32 113 114 #define EMPTY_FIELD_BOUNDARY 32 115 116 #define STRICT_ALIGNMENT 1 117 118 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT 119 120 /* Make strings word-aligned so strcpy from constants will be faster. */ 121 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ 122 (TREE_CODE (EXP) == STRING_CST \ 123 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 124 125 /* Make arrays and structures word-aligned to allow faster copying etc. */ 126 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 127 ((((ALIGN) < BITS_PER_WORD) \ 128 && (TREE_CODE (TYPE) == ARRAY_TYPE \ 129 || TREE_CODE (TYPE) == UNION_TYPE \ 130 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) 131 132 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause 133 character arrays to be word-aligned so that `strcpy' calls that copy 134 constants to character arrays can be done inline, and 'strcmp' can be 135 optimised to use word loads. */ 136 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \ 137 DATA_ALIGNMENT (TYPE, ALIGN) 138 139 /*----------------------------------------*/ 140 /* Layout of source language data types. */ 141 /*----------------------------------------*/ 142 143 #define INT_TYPE_SIZE 32 144 #define SHORT_TYPE_SIZE 16 145 #define LONG_TYPE_SIZE 32 146 #define LONG_LONG_TYPE_SIZE 64 147 148 #define FLOAT_TYPE_SIZE 32 149 #define DOUBLE_TYPE_SIZE 64 150 #define LONG_DOUBLE_TYPE_SIZE 64 151 152 #define DEFAULT_SIGNED_CHAR 0 153 154 #define SIZE_TYPE "unsigned int" 155 156 #define PTRDIFF_TYPE "int" 157 158 /*---------------------------*/ 159 /* Standard register usage. */ 160 /*---------------------------*/ 161 162 #define FIRST_PSEUDO_REGISTER 32 163 164 #define RV_REGNUM 1 165 #define GP_REGNUM 26 166 #define FP_REGNUM 27 167 #define SP_REGNUM 28 168 #define RA_REGNUM 29 169 170 #define G_REG_P(X) ((X)<32) 171 172 #define FIXED_REGISTERS \ 173 { 1, 0, 0, 0, 0, 0, 0, 0, \ 174 0, 0, 0, 0, 0, 0, 0, 0, \ 175 0, 0, 0, 0, 0, 0, 0, 0, \ 176 0, 0, 1, 0, 1, 0, 1, 1} 177 178 #define CALL_USED_REGISTERS \ 179 { 1, 1, 1, 1, 1, 1, 1, 1, \ 180 1, 1, 1, 0, 0, 0, 0, 0, \ 181 0, 0, 0, 0, 0, 0, 0, 0, \ 182 0, 0, 1, 0, 1, 0, 1, 1} 183 184 #define HARD_REGNO_NREGS(REGNO, MODE) \ 185 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 186 187 #define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO) 188 189 #define MODES_TIEABLE_P(MODE1, MODE2) \ 190 ( GET_MODE_CLASS (MODE1) == MODE_INT \ 191 && GET_MODE_CLASS (MODE2) == MODE_INT \ 192 && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ 193 && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) 194 195 #define AVOID_CCMODE_COPIES 196 197 /*----------------------------------*/ 198 /* Register classes and constants. */ 199 /*----------------------------------*/ 200 201 enum reg_class 202 { 203 NO_REGS, 204 GENERAL_REGS, 205 ALL_REGS, 206 LIM_REG_CLASSES 207 }; 208 209 #define N_REG_CLASSES (int) LIM_REG_CLASSES 210 211 #define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" } 212 213 #define REG_CLASS_CONTENTS \ 214 { {0x00000000}, \ 215 {0xffffffff}, \ 216 {0xffffffff} \ 217 } 218 219 #define REGNO_REG_CLASS(REGNO) \ 220 (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS) 221 222 #define CLASS_MAX_NREGS(CLASS, MODE) \ 223 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 224 225 #define INDEX_REG_CLASS NO_REGS 226 227 #define BASE_REG_CLASS GENERAL_REGS 228 229 #define REGNO_OK_FOR_BASE_P(REGNO) \ 230 (G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO])) 231 232 #define REGNO_OK_FOR_INDEX_P(REGNO) 0 233 234 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS) 235 236 /*----------------------------------------*/ 237 /* Stack Layout and Calling Conventions. */ 238 /*----------------------------------------*/ 239 240 #define STACK_GROWS_DOWNWARD 1 241 242 #define FRAME_GROWS_DOWNWARD 1 243 244 #define STACK_POINTER_OFFSET (UNITS_PER_WORD) 245 246 #define STARTING_FRAME_OFFSET (UNITS_PER_WORD) 247 248 #define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD) 249 250 #define STACK_POINTER_REGNUM SP_REGNUM 251 252 #define FRAME_POINTER_REGNUM FP_REGNUM 253 254 #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM 255 256 #define RETURN_ADDR_RTX(count, frame) \ 257 lm32_return_addr_rtx (count, frame) 258 259 /* FIXME - This is not yet supported. */ 260 #define STATIC_CHAIN_REGNUM 9 261 262 #define ELIMINABLE_REGS \ 263 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 264 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 265 } 266 267 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 268 (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO) 269 270 /*-----------------------------*/ 271 /* Function argument passing. */ 272 /*-----------------------------*/ 273 274 #define ACCUMULATE_OUTGOING_ARGS 1 275 276 #define RETURN_POPS_ARGS(DECL, FUNTYPE, SIZE) 0 277 278 /*--------------------------------*/ 279 /* Passing Arguments in Registers */ 280 /*--------------------------------*/ 281 282 /* The first argument register. */ 283 #define LM32_FIRST_ARG_REG 1 284 285 /* The number of (integer) argument register available. */ 286 #define LM32_NUM_ARG_REGS 8 287 288 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \ 289 lm32_function_arg ((CUM), (MODE), (TYPE), (NAMED)) 290 291 #define CUMULATIVE_ARGS int 292 293 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \ 294 (CUM) = 0 295 296 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \ 297 (CUM) += LM32_NUM_REGS2 (MODE, TYPE) 298 299 #define FUNCTION_ARG_REGNO_P(r) \ 300 (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS)) 301 302 /*--------------------*/ 303 /* Function results. */ 304 /*--------------------*/ 305 306 #define FUNCTION_VALUE(VALTYPE, FUNC) \ 307 gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \ 308 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \ 309 ? word_mode \ 310 : TYPE_MODE (VALTYPE), \ 311 RV_REGNUM) 312 313 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM) 314 315 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM) 316 317 #define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE) 318 319 #define DEFAULT_PCC_STRUCT_RETURN 0 320 321 /* Convert from bytes to ints. */ 322 #define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 323 324 /* The number of (integer) registers required to hold a quantity of 325 type MODE. */ 326 #define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE)) 327 328 /* The number of (integer) registers required to hold a quantity of 329 TYPE MODE. */ 330 #define LM32_NUM_REGS2(MODE, TYPE) \ 331 LM32_NUM_INTS ((MODE) == BLKmode ? \ 332 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) 333 334 #define STRUCT_VALUE 0 335 336 /*---------------------------*/ 337 /* Function entry and exit. */ 338 /*---------------------------*/ 339 340 /*-------------*/ 341 /* Profiling. */ 342 /*-------------*/ 343 344 #define FUNCTION_PROFILER(FILE, LABELNO) 345 346 /*---------------*/ 347 /* Trampolines. */ 348 /*---------------*/ 349 350 #define TRAMPOLINE_SIZE 0 351 352 /*---------------------*/ 353 /* Addressing Modes. */ 354 /*---------------------*/ 355 356 #define CONSTANT_ADDRESS_P(X) \ 357 ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 358 || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH \ 359 || (GET_CODE (X) == CONST))) 360 361 #define MAX_REGS_PER_ADDRESS 1 362 363 #define STRICT_REG_OK_FOR_BASE_P(X) \ 364 (REGNO_OK_FOR_BASE_P (REGNO (X))) 365 #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ 366 (G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X))) 367 368 #ifdef REG_OK_STRICT 369 #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X) 370 #else 371 #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X) 372 #endif 373 374 #define LEGITIMATE_CONSTANT_P(X) lm32_legitimate_constant_p 375 376 /*-------------------------*/ 377 /* Condition Code Status. */ 378 /*-------------------------*/ 379 380 #define REVERSIBLE_CC_MODE(MODE) 1 381 382 /*---------*/ 383 /* Costs. */ 384 /*---------*/ 385 386 #define SLOW_BYTE_ACCESS 1 387 388 #define NO_FUNCTION_CSE 389 390 #define BRANCH_COST(speed_p, predictable_p) 4 391 392 #define MOVE_RATIO(speed) (speed ? 24 : 3) 393 394 /*------------*/ 395 /* Sections. */ 396 /*------------*/ 397 398 #define TEXT_SECTION_ASM_OP "\t.section\t.text" 399 #define DATA_SECTION_ASM_OP "\t.section\t.data" 400 #define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\"" 401 #define BSS_SECTION_ASM_OP "\t.section\t.bss" 402 #define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\"" 403 404 /*-------*/ 405 /* PIC. */ 406 /*-------*/ 407 408 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM) 409 410 #define JUMP_TABLES_IN_TEXT_SECTION (flag_pic) 411 412 #define LEGITIMATE_PIC_OPERAND_P(X) \ 413 (!(nonpic_symbol_mentioned_p (X))) 414 415 /*-------------*/ 416 /* Assembler. */ 417 /*-------------*/ 418 419 #define ASM_COMMENT_START "#" 420 421 #define ASM_APP_ON "#APP\n" 422 423 #define ASM_APP_OFF "#NO_APP\n" 424 425 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 426 do { \ 427 fputc ( '\t', FILE); \ 428 assemble_name (FILE, LABEL1); \ 429 fputs ( " = ", FILE); \ 430 assemble_name (FILE, LABEL2); \ 431 fputc ( '\n', FILE); \ 432 } while (0) 433 434 /* Override default implementation in elfos.h to support -G. */ 435 #undef ASM_OUTPUT_ALIGNED_LOCAL 436 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ 437 do { \ 438 if ((SIZE) <= g_switch_value) \ 439 switch_to_section (sbss_section); \ 440 else \ 441 switch_to_section (bss_section); \ 442 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 443 if (!flag_inhibit_size_directive) \ 444 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ 445 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ 446 ASM_OUTPUT_LABEL(FILE, NAME); \ 447 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ 448 } while (0) 449 450 /* Override default implementation in elfos.h to support -G. */ 451 #undef ASM_OUTPUT_ALIGNED_COMMON 452 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 453 do \ 454 { \ 455 if ((SIZE) <= g_switch_value) \ 456 { \ 457 switch_to_section (sbss_section); \ 458 (*targetm.asm_out.globalize_label) (FILE, NAME); \ 459 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 460 if (!flag_inhibit_size_directive) \ 461 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ 462 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ 463 ASM_OUTPUT_LABEL(FILE, NAME); \ 464 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ 465 } \ 466 else \ 467 { \ 468 switch_to_section (bss_section); \ 469 fprintf ((FILE), "%s", COMMON_ASM_OP); \ 470 assemble_name ((FILE), (NAME)); \ 471 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 472 (SIZE), (ALIGN) / BITS_PER_UNIT); \ 473 } \ 474 } \ 475 while (0) 476 477 #define ASM_OUTPUT_LABEL(FILE, NAME) \ 478 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0) 479 480 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 481 do { \ 482 const char *xname = (NAME); \ 483 if (xname[0] == '@') \ 484 xname += 1; \ 485 if (xname[0] == '*') \ 486 xname += 1; \ 487 fputs (xname, FILE); \ 488 } while (0) 489 490 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \ 491 do { \ 492 assemble_name (STREAM, XSTR (SYMBOL, 0)); \ 493 } while (0) 494 495 #define GLOBAL_ASM_OP "\t.global\t" 496 497 #define REGISTER_NAMES \ 498 { \ 499 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ 500 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ 501 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ 502 "r24", "r25", "gp", "fp", "sp", "ra", "ea", "ba"} 503 504 #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ 505 (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*')) 506 507 #define PRINT_OPERAND(FILE, X, CODE) \ 508 lm32_print_operand (FILE, X, CODE) 509 510 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ 511 lm32_print_operand_address (FILE, ADDR) 512 513 #ifndef LOCAL_LABEL_PREFIX 514 #define LOCAL_LABEL_PREFIX "." 515 #endif 516 517 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 518 do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0) 519 520 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 521 do { \ 522 char label[64]; \ 523 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ 524 fprintf (FILE, "\n\t.word\t"); \ 525 assemble_name (FILE, label); \ 526 fprintf (FILE, "\n"); \ 527 } while (0) 528 529 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 530 do { \ 531 char label[64]; \ 532 fprintf (FILE, "\t.word\t("); \ 533 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ 534 assemble_name (FILE, label); \ 535 fprintf (FILE, "-"); \ 536 ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ 537 assemble_name (FILE, label); \ 538 fprintf (FILE, ")\n"); \ 539 } while (0) 540 541 /*-------------*/ 542 /* Debugging. */ 543 /*-------------*/ 544 545 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 546 547 #define CAN_DEBUG_WITHOUT_FP 548 549 #define DEFAULT_GDB_EXTENSIONS 1 550 551 /*--------*/ 552 /* Misc. */ 553 /*--------*/ 554 555 #define CASE_VECTOR_MODE Pmode 556 557 #define WORD_REGISTER_OPERATIONS 558 559 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND 560 561 #define SHORT_IMMEDIATES_SIGN_EXTEND 562 563 #define MOVE_MAX UNITS_PER_WORD 564 #define MAX_MOVE_MAX 4 565 566 #define SHIFT_COUNT_TRUNCATED 1 567 568 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 569 570 #define Pmode SImode 571 572 #define FUNCTION_MODE SImode 573 574 #ifndef NO_IMPLICIT_EXTERN_C 575 #define NO_IMPLICIT_EXTERN_C 576 #endif 577 578 #define STORE_FLAG_VALUE 1 579