1 /* Definitions of target machine for GNU compiler, Lattice Mico32 architecture. 2 Contributed by Jon Beniston <jon@beniston.com> 3 4 Copyright (C) 2009-2013 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 /* Target CPU builtins. */ 27 #define TARGET_CPU_CPP_BUILTINS() \ 28 do \ 29 { \ 30 builtin_define ("__lm32__"); \ 31 builtin_assert ("cpu=lm32"); \ 32 builtin_assert ("machine=lm32"); \ 33 if (TARGET_MULTIPLY_ENABLED) \ 34 builtin_define ("__multiply_enabled__"); \ 35 if (TARGET_DIVIDE_ENABLED) \ 36 builtin_define ("__divide_enabled__"); \ 37 if (TARGET_BARREL_SHIFT_ENABLED) \ 38 builtin_define ("__barrel_shift_enabled__"); \ 39 if (TARGET_SIGN_EXTEND_ENABLED) \ 40 builtin_define ("__sign_extend_enabled__"); \ 41 if (TARGET_USER_ENABLED) \ 42 builtin_define ("__user_enabled__"); \ 43 } \ 44 while (0) 45 46 #undef ASM_SPEC 47 #define ASM_SPEC "\ 48 %{mmultiply-enabled} \ 49 %{mdivide-enabled} \ 50 %{mbarrel-shift-enabled} \ 51 %{msign-extend-enabled} \ 52 %{muser-enabled} \ 53 " 54 55 /* Let link script define all link options. 56 Default to using simulator link script. */ 57 58 #undef STARTFILE_SPEC 59 #define STARTFILE_SPEC "" 60 #undef ENDFILE_SPEC 61 #define ENDFILE_SPEC "" 62 #undef LIB_SPEC 63 #define LIB_SPEC "%{!T*:-T sim.ld}" 64 65 #undef CC1_SPEC 66 #define CC1_SPEC "%{G*}" 67 68 /*---------------------------------*/ 69 /* Target machine storage layout. */ 70 /*---------------------------------*/ 71 72 #define BITS_BIG_ENDIAN 0 73 #define BYTES_BIG_ENDIAN 1 74 #define WORDS_BIG_ENDIAN 1 75 76 #define BITS_PER_UNIT 8 77 #define BITS_PER_WORD 32 78 #define UNITS_PER_WORD 4 79 80 #define POINTER_SIZE 32 81 82 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 83 do { \ 84 if (GET_MODE_CLASS (MODE) == MODE_INT \ 85 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ 86 (MODE) = word_mode; \ 87 } while (0) 88 89 #define PARM_BOUNDARY 32 90 91 #define STACK_BOUNDARY 32 92 93 #define BIGGEST_ALIGNMENT 64 94 95 #define FUNCTION_BOUNDARY 32 96 97 #define EMPTY_FIELD_BOUNDARY 32 98 99 #define STRICT_ALIGNMENT 1 100 101 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT 102 103 /* Make strings word-aligned so strcpy from constants will be faster. */ 104 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ 105 (TREE_CODE (EXP) == STRING_CST \ 106 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 107 108 /* Make arrays and structures word-aligned to allow faster copying etc. */ 109 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 110 ((((ALIGN) < BITS_PER_WORD) \ 111 && (TREE_CODE (TYPE) == ARRAY_TYPE \ 112 || TREE_CODE (TYPE) == UNION_TYPE \ 113 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) 114 115 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause 116 character arrays to be word-aligned so that `strcpy' calls that copy 117 constants to character arrays can be done inline, and 'strcmp' can be 118 optimised to use word loads. */ 119 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \ 120 DATA_ALIGNMENT (TYPE, ALIGN) 121 122 /*----------------------------------------*/ 123 /* Layout of source language data types. */ 124 /*----------------------------------------*/ 125 126 #define INT_TYPE_SIZE 32 127 #define SHORT_TYPE_SIZE 16 128 #define LONG_TYPE_SIZE 32 129 #define LONG_LONG_TYPE_SIZE 64 130 131 #define FLOAT_TYPE_SIZE 32 132 #define DOUBLE_TYPE_SIZE 64 133 #define LONG_DOUBLE_TYPE_SIZE 64 134 135 #define DEFAULT_SIGNED_CHAR 0 136 137 #define SIZE_TYPE "unsigned int" 138 139 #define PTRDIFF_TYPE "int" 140 141 /*---------------------------*/ 142 /* Standard register usage. */ 143 /*---------------------------*/ 144 145 #define FIRST_PSEUDO_REGISTER 32 146 147 #define RV_REGNUM 1 148 #define GP_REGNUM 26 149 #define FP_REGNUM 27 150 #define SP_REGNUM 28 151 #define RA_REGNUM 29 152 153 #define G_REG_P(X) ((X)<32) 154 155 #define FIXED_REGISTERS \ 156 { 1, 0, 0, 0, 0, 0, 0, 0, \ 157 0, 0, 0, 0, 0, 0, 0, 0, \ 158 0, 0, 0, 0, 0, 0, 0, 0, \ 159 0, 0, 1, 0, 1, 0, 1, 1} 160 161 #define CALL_USED_REGISTERS \ 162 { 1, 1, 1, 1, 1, 1, 1, 1, \ 163 1, 1, 1, 0, 0, 0, 0, 0, \ 164 0, 0, 0, 0, 0, 0, 0, 0, \ 165 0, 0, 1, 0, 1, 0, 1, 1} 166 167 #define HARD_REGNO_NREGS(REGNO, MODE) \ 168 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 169 170 #define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO) 171 172 #define MODES_TIEABLE_P(MODE1, MODE2) \ 173 ( GET_MODE_CLASS (MODE1) == MODE_INT \ 174 && GET_MODE_CLASS (MODE2) == MODE_INT \ 175 && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ 176 && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) 177 178 #define AVOID_CCMODE_COPIES 179 180 /*----------------------------------*/ 181 /* Register classes and constants. */ 182 /*----------------------------------*/ 183 184 enum reg_class 185 { 186 NO_REGS, 187 GENERAL_REGS, 188 ALL_REGS, 189 LIM_REG_CLASSES 190 }; 191 192 #define N_REG_CLASSES (int) LIM_REG_CLASSES 193 194 #define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" } 195 196 #define REG_CLASS_CONTENTS \ 197 { {0x00000000}, \ 198 {0xffffffff}, \ 199 {0xffffffff} \ 200 } 201 202 #define REGNO_REG_CLASS(REGNO) \ 203 (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS) 204 205 #define INDEX_REG_CLASS NO_REGS 206 207 #define BASE_REG_CLASS GENERAL_REGS 208 209 #define REGNO_OK_FOR_BASE_P(REGNO) \ 210 (G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO])) 211 212 #define REGNO_OK_FOR_INDEX_P(REGNO) 0 213 214 /*----------------------------------------*/ 215 /* Stack Layout and Calling Conventions. */ 216 /*----------------------------------------*/ 217 218 #define STACK_GROWS_DOWNWARD 1 219 220 #define FRAME_GROWS_DOWNWARD 1 221 222 #define STACK_POINTER_OFFSET (UNITS_PER_WORD) 223 224 #define STARTING_FRAME_OFFSET (UNITS_PER_WORD) 225 226 #define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD) 227 228 #define STACK_POINTER_REGNUM SP_REGNUM 229 230 #define FRAME_POINTER_REGNUM FP_REGNUM 231 232 #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM 233 234 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RA_REGNUM) 235 236 #define RETURN_ADDR_RTX(count, frame) \ 237 lm32_return_addr_rtx (count, frame) 238 239 /* FIXME - This is not yet supported. */ 240 #define STATIC_CHAIN_REGNUM 9 241 242 #define ELIMINABLE_REGS \ 243 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 244 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 245 } 246 247 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 248 (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO) 249 250 /*-----------------------------*/ 251 /* Function argument passing. */ 252 /*-----------------------------*/ 253 254 #define ACCUMULATE_OUTGOING_ARGS 1 255 256 /*--------------------------------*/ 257 /* Passing Arguments in Registers */ 258 /*--------------------------------*/ 259 260 /* The first argument register. */ 261 #define LM32_FIRST_ARG_REG 1 262 263 /* The number of (integer) argument register available. */ 264 #define LM32_NUM_ARG_REGS 8 265 266 #define CUMULATIVE_ARGS int 267 268 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \ 269 (CUM) = 0 270 271 #define FUNCTION_ARG_REGNO_P(r) \ 272 (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS)) 273 274 /*--------------------*/ 275 /* Function results. */ 276 /*--------------------*/ 277 278 #define FUNCTION_VALUE(VALTYPE, FUNC) \ 279 gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \ 280 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \ 281 ? word_mode \ 282 : TYPE_MODE (VALTYPE), \ 283 RV_REGNUM) 284 285 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM) 286 287 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM) 288 289 #define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE) 290 291 #define DEFAULT_PCC_STRUCT_RETURN 0 292 293 /* Convert from bytes to ints. */ 294 #define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 295 296 /* The number of (integer) registers required to hold a quantity of 297 type MODE. */ 298 #define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE)) 299 300 /* The number of (integer) registers required to hold a quantity of 301 TYPE MODE. */ 302 #define LM32_NUM_REGS2(MODE, TYPE) \ 303 LM32_NUM_INTS ((MODE) == BLKmode ? \ 304 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) 305 306 #define STRUCT_VALUE 0 307 308 /*---------------------------*/ 309 /* Function entry and exit. */ 310 /*---------------------------*/ 311 312 /*-------------*/ 313 /* Profiling. */ 314 /*-------------*/ 315 316 #define FUNCTION_PROFILER(FILE, LABELNO) 317 318 /*---------------*/ 319 /* Trampolines. */ 320 /*---------------*/ 321 322 #define TRAMPOLINE_SIZE 0 323 324 /*---------------------*/ 325 /* Addressing Modes. */ 326 /*---------------------*/ 327 328 #define CONSTANT_ADDRESS_P(X) \ 329 ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 330 || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH \ 331 || (GET_CODE (X) == CONST))) 332 333 #define MAX_REGS_PER_ADDRESS 1 334 335 #define STRICT_REG_OK_FOR_BASE_P(X) \ 336 (REGNO_OK_FOR_BASE_P (REGNO (X))) 337 #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ 338 (G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X))) 339 340 #ifdef REG_OK_STRICT 341 #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X) 342 #else 343 #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X) 344 #endif 345 346 /*-------------------------*/ 347 /* Condition Code Status. */ 348 /*-------------------------*/ 349 350 #define REVERSIBLE_CC_MODE(MODE) 1 351 352 /*---------*/ 353 /* Costs. */ 354 /*---------*/ 355 356 #define SLOW_BYTE_ACCESS 1 357 358 #define NO_FUNCTION_CSE 359 360 #define BRANCH_COST(speed_p, predictable_p) 4 361 362 #define MOVE_RATIO(speed) (speed ? 24 : 3) 363 364 /*------------*/ 365 /* Sections. */ 366 /*------------*/ 367 368 #define TEXT_SECTION_ASM_OP "\t.section\t.text" 369 #define DATA_SECTION_ASM_OP "\t.section\t.data" 370 #define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\"" 371 #define BSS_SECTION_ASM_OP "\t.section\t.bss" 372 #define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\"" 373 374 /*-------*/ 375 /* PIC. */ 376 /*-------*/ 377 378 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM) 379 380 #define JUMP_TABLES_IN_TEXT_SECTION (flag_pic) 381 382 #define LEGITIMATE_PIC_OPERAND_P(X) \ 383 (!(nonpic_symbol_mentioned_p (X))) 384 385 /*-------------*/ 386 /* Assembler. */ 387 /*-------------*/ 388 389 #define ASM_COMMENT_START "#" 390 391 #define ASM_APP_ON "#APP\n" 392 393 #define ASM_APP_OFF "#NO_APP\n" 394 395 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 396 do { \ 397 fputc ( '\t', FILE); \ 398 assemble_name (FILE, LABEL1); \ 399 fputs ( " = ", FILE); \ 400 assemble_name (FILE, LABEL2); \ 401 fputc ( '\n', FILE); \ 402 } while (0) 403 404 /* Override default implementation in elfos.h to support -G. */ 405 #undef ASM_OUTPUT_ALIGNED_LOCAL 406 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ 407 do { \ 408 if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \ 409 switch_to_section (sbss_section); \ 410 else \ 411 switch_to_section (bss_section); \ 412 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 413 if (!flag_inhibit_size_directive) \ 414 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ 415 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ 416 ASM_OUTPUT_LABEL(FILE, NAME); \ 417 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ 418 } while (0) 419 420 /* Override default implementation in elfos.h to support -G. */ 421 #undef ASM_OUTPUT_ALIGNED_COMMON 422 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 423 do \ 424 { \ 425 if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \ 426 { \ 427 switch_to_section (sbss_section); \ 428 (*targetm.asm_out.globalize_label) (FILE, NAME); \ 429 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 430 if (!flag_inhibit_size_directive) \ 431 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ 432 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ 433 ASM_OUTPUT_LABEL(FILE, NAME); \ 434 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ 435 } \ 436 else \ 437 { \ 438 switch_to_section (bss_section); \ 439 fprintf ((FILE), "%s", COMMON_ASM_OP); \ 440 assemble_name ((FILE), (NAME)); \ 441 fprintf ((FILE), ","HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 442 (SIZE), (ALIGN) / BITS_PER_UNIT); \ 443 } \ 444 } \ 445 while (0) 446 447 #define ASM_OUTPUT_LABEL(FILE, NAME) \ 448 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0) 449 450 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 451 do { \ 452 const char *xname = (NAME); \ 453 if (xname[0] == '@') \ 454 xname += 1; \ 455 if (xname[0] == '*') \ 456 xname += 1; \ 457 fputs (xname, FILE); \ 458 } while (0) 459 460 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \ 461 do { \ 462 assemble_name (STREAM, XSTR (SYMBOL, 0)); \ 463 } while (0) 464 465 #define GLOBAL_ASM_OP "\t.global\t" 466 467 #define REGISTER_NAMES \ 468 { \ 469 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ 470 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ 471 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ 472 "r24", "r25", "gp", "fp", "sp", "ra", "ea", "ba"} 473 474 #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ 475 (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*')) 476 477 #define PRINT_OPERAND(FILE, X, CODE) \ 478 lm32_print_operand (FILE, X, CODE) 479 480 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ 481 lm32_print_operand_address (FILE, ADDR) 482 483 #ifndef LOCAL_LABEL_PREFIX 484 #define LOCAL_LABEL_PREFIX "." 485 #endif 486 487 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 488 do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0) 489 490 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 491 do { \ 492 char label[64]; \ 493 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ 494 fprintf (FILE, "\n\t.word\t"); \ 495 assemble_name (FILE, label); \ 496 fprintf (FILE, "\n"); \ 497 } while (0) 498 499 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 500 do { \ 501 char label[64]; \ 502 fprintf (FILE, "\t.word\t("); \ 503 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ 504 assemble_name (FILE, label); \ 505 fprintf (FILE, "-"); \ 506 ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ 507 assemble_name (FILE, label); \ 508 fprintf (FILE, ")\n"); \ 509 } while (0) 510 511 /*-------------*/ 512 /* Debugging. */ 513 /*-------------*/ 514 515 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 516 517 #define DEFAULT_GDB_EXTENSIONS 1 518 519 /*--------*/ 520 /* Misc. */ 521 /*--------*/ 522 523 #define CASE_VECTOR_MODE Pmode 524 525 #define WORD_REGISTER_OPERATIONS 526 527 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND 528 529 #define SHORT_IMMEDIATES_SIGN_EXTEND 530 531 #define MOVE_MAX UNITS_PER_WORD 532 #define MAX_MOVE_MAX 4 533 534 #define SHIFT_COUNT_TRUNCATED 1 535 536 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 537 538 #define Pmode SImode 539 540 #define FUNCTION_MODE SImode 541 542 #ifndef NO_IMPLICIT_EXTERN_C 543 #define NO_IMPLICIT_EXTERN_C 544 #endif 545 546 #define STORE_FLAG_VALUE 1 547