1 /* Definitions of target machine for GNU compiler, Lattice Mico32 architecture. 2 Contributed by Jon Beniston <jon@beniston.com> 3 4 Copyright (C) 2009-2016 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_WORD 32 77 #define UNITS_PER_WORD 4 78 79 #define POINTER_SIZE 32 80 81 #define PROMOTE_MODE(MODE,UNSIGNEDP,TYPE) \ 82 do { \ 83 if (GET_MODE_CLASS (MODE) == MODE_INT \ 84 && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \ 85 (MODE) = word_mode; \ 86 } while (0) 87 88 #define PARM_BOUNDARY 32 89 90 #define STACK_BOUNDARY 32 91 92 #define BIGGEST_ALIGNMENT 64 93 94 #define FUNCTION_BOUNDARY 32 95 96 #define EMPTY_FIELD_BOUNDARY 32 97 98 #define STRICT_ALIGNMENT 1 99 100 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT 101 102 /* Make strings word-aligned so strcpy from constants will be faster. */ 103 #define CONSTANT_ALIGNMENT(EXP, ALIGN) \ 104 (TREE_CODE (EXP) == STRING_CST \ 105 && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN)) 106 107 /* Make arrays and structures word-aligned to allow faster copying etc. */ 108 #define DATA_ALIGNMENT(TYPE, ALIGN) \ 109 ((((ALIGN) < BITS_PER_WORD) \ 110 && (TREE_CODE (TYPE) == ARRAY_TYPE \ 111 || TREE_CODE (TYPE) == UNION_TYPE \ 112 || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN)) 113 114 /* We need this for the same reason as DATA_ALIGNMENT, namely to cause 115 character arrays to be word-aligned so that `strcpy' calls that copy 116 constants to character arrays can be done inline, and 'strcmp' can be 117 optimised to use word loads. */ 118 #define LOCAL_ALIGNMENT(TYPE, ALIGN) \ 119 DATA_ALIGNMENT (TYPE, ALIGN) 120 121 /*----------------------------------------*/ 122 /* Layout of source language data types. */ 123 /*----------------------------------------*/ 124 125 #define INT_TYPE_SIZE 32 126 #define SHORT_TYPE_SIZE 16 127 #define LONG_TYPE_SIZE 32 128 #define LONG_LONG_TYPE_SIZE 64 129 130 #define FLOAT_TYPE_SIZE 32 131 #define DOUBLE_TYPE_SIZE 64 132 #define LONG_DOUBLE_TYPE_SIZE 64 133 134 #define DEFAULT_SIGNED_CHAR 0 135 136 #define SIZE_TYPE "unsigned int" 137 138 #define PTRDIFF_TYPE "int" 139 140 /*---------------------------*/ 141 /* Standard register usage. */ 142 /*---------------------------*/ 143 144 #define FIRST_PSEUDO_REGISTER 32 145 146 #define RV_REGNUM 1 147 #define GP_REGNUM 26 148 #define FP_REGNUM 27 149 #define SP_REGNUM 28 150 #define RA_REGNUM 29 151 152 #define G_REG_P(X) ((X)<32) 153 154 #define FIXED_REGISTERS \ 155 { 1, 0, 0, 0, 0, 0, 0, 0, \ 156 0, 0, 0, 0, 0, 0, 0, 0, \ 157 0, 0, 0, 0, 0, 0, 0, 0, \ 158 0, 0, 1, 0, 1, 0, 1, 1} 159 160 #define CALL_USED_REGISTERS \ 161 { 1, 1, 1, 1, 1, 1, 1, 1, \ 162 1, 1, 1, 0, 0, 0, 0, 0, \ 163 0, 0, 0, 0, 0, 0, 0, 0, \ 164 0, 0, 1, 0, 1, 0, 1, 1} 165 166 #define HARD_REGNO_NREGS(REGNO, MODE) \ 167 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 168 169 #define HARD_REGNO_MODE_OK(REGNO, MODE) G_REG_P(REGNO) 170 171 #define MODES_TIEABLE_P(MODE1, MODE2) \ 172 ( GET_MODE_CLASS (MODE1) == MODE_INT \ 173 && GET_MODE_CLASS (MODE2) == MODE_INT \ 174 && GET_MODE_SIZE (MODE1) <= UNITS_PER_WORD \ 175 && GET_MODE_SIZE (MODE2) <= UNITS_PER_WORD) 176 177 #define AVOID_CCMODE_COPIES 178 179 /*----------------------------------*/ 180 /* Register classes and constants. */ 181 /*----------------------------------*/ 182 183 enum reg_class 184 { 185 NO_REGS, 186 GENERAL_REGS, 187 ALL_REGS, 188 LIM_REG_CLASSES 189 }; 190 191 #define N_REG_CLASSES (int) LIM_REG_CLASSES 192 193 #define REG_CLASS_NAMES { "NO_REGS", "GENERAL_REGS", "ALL_REGS" } 194 195 #define REG_CLASS_CONTENTS \ 196 { {0x00000000}, \ 197 {0xffffffff}, \ 198 {0xffffffff} \ 199 } 200 201 #define REGNO_REG_CLASS(REGNO) \ 202 (G_REG_P(REGNO) ? GENERAL_REGS : NO_REGS) 203 204 #define INDEX_REG_CLASS NO_REGS 205 206 #define BASE_REG_CLASS GENERAL_REGS 207 208 #define REGNO_OK_FOR_BASE_P(REGNO) \ 209 (G_REG_P (REGNO) || G_REG_P ((unsigned) reg_renumber[REGNO])) 210 211 #define REGNO_OK_FOR_INDEX_P(REGNO) 0 212 213 /*----------------------------------------*/ 214 /* Stack Layout and Calling Conventions. */ 215 /*----------------------------------------*/ 216 217 #define STACK_GROWS_DOWNWARD 1 218 219 #define FRAME_GROWS_DOWNWARD 1 220 221 #define STACK_POINTER_OFFSET (UNITS_PER_WORD) 222 223 #define STARTING_FRAME_OFFSET (UNITS_PER_WORD) 224 225 #define FIRST_PARM_OFFSET(FNDECL) (UNITS_PER_WORD) 226 227 #define STACK_POINTER_REGNUM SP_REGNUM 228 229 #define FRAME_POINTER_REGNUM FP_REGNUM 230 231 #define ARG_POINTER_REGNUM FRAME_POINTER_REGNUM 232 233 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (SImode, RA_REGNUM) 234 235 #define RETURN_ADDR_RTX(count, frame) \ 236 lm32_return_addr_rtx (count, frame) 237 238 /* FIXME - This is not yet supported. */ 239 #define STATIC_CHAIN_REGNUM 9 240 241 #define ELIMINABLE_REGS \ 242 {{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 243 { ARG_POINTER_REGNUM, STACK_POINTER_REGNUM }, \ 244 } 245 246 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \ 247 (OFFSET) = lm32_compute_initial_elimination_offset (FROM, TO) 248 249 /*-----------------------------*/ 250 /* Function argument passing. */ 251 /*-----------------------------*/ 252 253 #define ACCUMULATE_OUTGOING_ARGS 1 254 255 /*--------------------------------*/ 256 /* Passing Arguments in Registers */ 257 /*--------------------------------*/ 258 259 /* The first argument register. */ 260 #define LM32_FIRST_ARG_REG 1 261 262 /* The number of (integer) argument register available. */ 263 #define LM32_NUM_ARG_REGS 8 264 265 #define CUMULATIVE_ARGS int 266 267 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,INDIRECT,N_NAMED_ARGS) \ 268 (CUM) = 0 269 270 #define FUNCTION_ARG_REGNO_P(r) \ 271 (((r) >= LM32_FIRST_ARG_REG) && ((r) <= LM32_NUM_ARG_REGS)) 272 273 /*--------------------*/ 274 /* Function results. */ 275 /*--------------------*/ 276 277 #define FUNCTION_VALUE(VALTYPE, FUNC) \ 278 gen_rtx_REG ((INTEGRAL_TYPE_P (VALTYPE) \ 279 && TYPE_PRECISION (VALTYPE) < BITS_PER_WORD) \ 280 ? word_mode \ 281 : TYPE_MODE (VALTYPE), \ 282 RV_REGNUM) 283 284 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, RV_REGNUM) 285 286 #define FUNCTION_VALUE_REGNO_P(N) ((N) == RV_REGNUM) 287 288 #define RETURN_IN_MEMORY(TYPE) lm32_return_in_memory (TYPE) 289 290 #define DEFAULT_PCC_STRUCT_RETURN 0 291 292 /* Convert from bytes to ints. */ 293 #define LM32_NUM_INTS(X) (((X) + UNITS_PER_WORD - 1) / UNITS_PER_WORD) 294 295 /* The number of (integer) registers required to hold a quantity of 296 type MODE. */ 297 #define LM32_NUM_REGS(MODE) LM32_NUM_INTS (GET_MODE_SIZE (MODE)) 298 299 /* The number of (integer) registers required to hold a quantity of 300 TYPE MODE. */ 301 #define LM32_NUM_REGS2(MODE, TYPE) \ 302 LM32_NUM_INTS ((MODE) == BLKmode ? \ 303 int_size_in_bytes (TYPE) : GET_MODE_SIZE (MODE)) 304 305 /*---------------------------*/ 306 /* Function entry and exit. */ 307 /*---------------------------*/ 308 309 /*-------------*/ 310 /* Profiling. */ 311 /*-------------*/ 312 313 #define FUNCTION_PROFILER(FILE, LABELNO) 314 315 /*---------------*/ 316 /* Trampolines. */ 317 /*---------------*/ 318 319 #define TRAMPOLINE_SIZE 0 320 321 /*---------------------*/ 322 /* Addressing Modes. */ 323 /*---------------------*/ 324 325 #define CONSTANT_ADDRESS_P(X) \ 326 ((GET_CODE (X) == LABEL_REF || GET_CODE (X) == SYMBOL_REF \ 327 || GET_CODE (X) == CONST_INT || GET_CODE (X) == HIGH \ 328 || (GET_CODE (X) == CONST))) 329 330 #define MAX_REGS_PER_ADDRESS 1 331 332 #define STRICT_REG_OK_FOR_BASE_P(X) \ 333 (REGNO_OK_FOR_BASE_P (REGNO (X))) 334 #define NONSTRICT_REG_OK_FOR_BASE_P(X) \ 335 (G_REG_P (REGNO (X)) || !HARD_REGISTER_NUM_P (REGNO (X))) 336 337 #ifdef REG_OK_STRICT 338 #define REG_OK_FOR_BASE_P(X) STRICT_REG_OK_FOR_BASE_P(X) 339 #else 340 #define REG_OK_FOR_BASE_P(X) NONSTRICT_REG_OK_FOR_BASE_P(X) 341 #endif 342 343 /*-------------------------*/ 344 /* Condition Code Status. */ 345 /*-------------------------*/ 346 347 #define REVERSIBLE_CC_MODE(MODE) 1 348 349 /*---------*/ 350 /* Costs. */ 351 /*---------*/ 352 353 #define SLOW_BYTE_ACCESS 1 354 355 #define NO_FUNCTION_CSE 1 356 357 #define BRANCH_COST(speed_p, predictable_p) 4 358 359 #define MOVE_RATIO(speed) (speed ? 24 : 3) 360 361 /*------------*/ 362 /* Sections. */ 363 /*------------*/ 364 365 #define TEXT_SECTION_ASM_OP "\t.section\t.text" 366 #define DATA_SECTION_ASM_OP "\t.section\t.data" 367 #define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\"" 368 #define BSS_SECTION_ASM_OP "\t.section\t.bss" 369 #define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\"" 370 371 /*-------*/ 372 /* PIC. */ 373 /*-------*/ 374 375 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? GP_REGNUM : INVALID_REGNUM) 376 377 #define JUMP_TABLES_IN_TEXT_SECTION (flag_pic) 378 379 #define LEGITIMATE_PIC_OPERAND_P(X) \ 380 (!(nonpic_symbol_mentioned_p (X))) 381 382 /*-------------*/ 383 /* Assembler. */ 384 /*-------------*/ 385 386 #define ASM_COMMENT_START "#" 387 388 #define ASM_APP_ON "#APP\n" 389 390 #define ASM_APP_OFF "#NO_APP\n" 391 392 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \ 393 do { \ 394 fputc ( '\t', FILE); \ 395 assemble_name (FILE, LABEL1); \ 396 fputs ( " = ", FILE); \ 397 assemble_name (FILE, LABEL2); \ 398 fputc ( '\n', FILE); \ 399 } while (0) 400 401 /* Override default implementation in elfos.h to support -G. */ 402 #undef ASM_OUTPUT_ALIGNED_LOCAL 403 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN) \ 404 do { \ 405 if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \ 406 switch_to_section (sbss_section); \ 407 else \ 408 switch_to_section (bss_section); \ 409 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 410 if (!flag_inhibit_size_directive) \ 411 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ 412 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ 413 ASM_OUTPUT_LABEL(FILE, NAME); \ 414 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ 415 } while (0) 416 417 /* Override default implementation in elfos.h to support -G. */ 418 #undef ASM_OUTPUT_ALIGNED_COMMON 419 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN) \ 420 do \ 421 { \ 422 if ((SIZE) <= (unsigned HOST_WIDE_INT) g_switch_value) \ 423 { \ 424 switch_to_section (sbss_section); \ 425 (*targetm.asm_out.globalize_label) (FILE, NAME); \ 426 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 427 if (!flag_inhibit_size_directive) \ 428 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, SIZE); \ 429 ASM_OUTPUT_ALIGN ((FILE), exact_log2((ALIGN) / BITS_PER_UNIT)); \ 430 ASM_OUTPUT_LABEL(FILE, NAME); \ 431 ASM_OUTPUT_SKIP((FILE), (SIZE) ? (SIZE) : 1); \ 432 } \ 433 else \ 434 { \ 435 switch_to_section (bss_section); \ 436 fprintf ((FILE), "%s", COMMON_ASM_OP); \ 437 assemble_name ((FILE), (NAME)); \ 438 fprintf ((FILE), "," HOST_WIDE_INT_PRINT_UNSIGNED",%u\n", \ 439 (SIZE), (ALIGN) / BITS_PER_UNIT); \ 440 } \ 441 } \ 442 while (0) 443 444 #define ASM_OUTPUT_LABEL(FILE, NAME) \ 445 do { assemble_name (FILE, NAME); fputs (":\n", FILE); } while (0) 446 447 #define ASM_OUTPUT_LABELREF(FILE,NAME) \ 448 do { \ 449 const char *xname = (NAME); \ 450 if (xname[0] == '@') \ 451 xname += 1; \ 452 if (xname[0] == '*') \ 453 xname += 1; \ 454 fputs (xname, FILE); \ 455 } while (0) 456 457 #define ASM_OUTPUT_SYMBOL_REF(STREAM, SYMBOL) \ 458 do { \ 459 assemble_name (STREAM, XSTR (SYMBOL, 0)); \ 460 } while (0) 461 462 #define GLOBAL_ASM_OP "\t.global\t" 463 464 #define REGISTER_NAMES \ 465 { \ 466 "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \ 467 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15", \ 468 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \ 469 "r24", "r25", "gp", "fp", "sp", "ra", "ea", "ba"} 470 471 #define PRINT_OPERAND_PUNCT_VALID_P(CHAR) \ 472 (((CHAR) == '&') || ((CHAR) == '@') || ((CHAR) == '*')) 473 474 #define PRINT_OPERAND(FILE, X, CODE) \ 475 lm32_print_operand (FILE, X, CODE) 476 477 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \ 478 lm32_print_operand_address (FILE, ADDR) 479 480 #ifndef LOCAL_LABEL_PREFIX 481 #define LOCAL_LABEL_PREFIX "." 482 #endif 483 484 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 485 do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", (1 << (LOG))); } while (0) 486 487 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \ 488 do { \ 489 char label[64]; \ 490 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ 491 fprintf (FILE, "\n\t.word\t"); \ 492 assemble_name (FILE, label); \ 493 fprintf (FILE, "\n"); \ 494 } while (0) 495 496 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \ 497 do { \ 498 char label[64]; \ 499 fprintf (FILE, "\t.word\t("); \ 500 ASM_GENERATE_INTERNAL_LABEL (label, "L", VALUE); \ 501 assemble_name (FILE, label); \ 502 fprintf (FILE, "-"); \ 503 ASM_GENERATE_INTERNAL_LABEL (label, "L", REL); \ 504 assemble_name (FILE, label); \ 505 fprintf (FILE, ")\n"); \ 506 } while (0) 507 508 /*-------------*/ 509 /* Debugging. */ 510 /*-------------*/ 511 512 #define DBX_REGISTER_NUMBER(REGNO) (REGNO) 513 514 #define DEFAULT_GDB_EXTENSIONS 1 515 516 /*--------*/ 517 /* Misc. */ 518 /*--------*/ 519 520 #define CASE_VECTOR_MODE Pmode 521 522 #define WORD_REGISTER_OPERATIONS 1 523 524 #define LOAD_EXTEND_OP(MODE) ZERO_EXTEND 525 526 #define SHORT_IMMEDIATES_SIGN_EXTEND 1 527 528 #define MOVE_MAX UNITS_PER_WORD 529 #define MAX_MOVE_MAX 4 530 531 #define SHIFT_COUNT_TRUNCATED 1 532 533 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1 534 535 #define Pmode SImode 536 537 #define FUNCTION_MODE SImode 538 539 #ifndef NO_IMPLICIT_EXTERN_C 540 #define NO_IMPLICIT_EXTERN_C 541 #endif 542 543 #define STORE_FLAG_VALUE 1 544