gcc/config/crx/crx.h

   1 /* Definitions of target machine for GNU compiler, for CRX.
   2    Copyright (C) 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
   3    2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 2, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    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 COPYING.  If not, write to
  19    the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, USA.  */
  21
  22 #ifndef GCC_CRX_H
  23 #define GCC_CRX_H
  24
  25 /*****************************************************************************/
  26 /* CONTROLLING THE DRIVER                                                    */
  27 /*****************************************************************************/
  28
  29 #define CC1PLUS_SPEC "%{!frtti:-fno-rtti} \
  30     %{!fenforce-eh-specs:-fno-enforce-eh-specs} \
  31     %{!fexceptions:-fno-exceptions} \
  32     %{!fthreadsafe-statics:-fno-threadsafe-statics}"
  33
  34 #undef  STARTFILE_SPEC
  35 #define STARTFILE_SPEC "crti.o%s crtbegin.o%s"
  36
  37 #undef  ENDFILE_SPEC
  38 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
  39
  40 #undef MATH_LIBRARY
  41 #define MATH_LIBRARY ""
  42
  43 /*****************************************************************************/
  44 /* RUN-TIME TARGET SPECIFICATION                                             */
  45 /*****************************************************************************/
  46
  47 #ifndef TARGET_CPU_CPP_BUILTINS
  48 #define TARGET_CPU_CPP_BUILTINS()                               \
  49 do {                                                            \
  50      builtin_define("__CRX__");                                 \
  51      builtin_define("__CR__");                                  \
  52 } while (0)
  53 #endif
  54
  55 #define TARGET_VERSION fputs (" (CRX/ELF)", stderr);
  56
  57 /* Put each function in its own section so that PAGE-instruction
  58  * relaxation can do its best.  */
  59 #define OPTIMIZATION_OPTIONS(LEVEL, SIZEFLAG)   \
  60     do {                                        \
  61         if ((LEVEL) || (SIZEFLAG))              \
  62             flag_function_sections = 1; \
  63     } while (0)
  64
  65 /* Show we can debug even without a frame pointer.  */
  66 #define CAN_DEBUG_WITHOUT_FP
  67
  68 /*****************************************************************************/
  69 /* STORAGE LAYOUT                                                            */
  70 /*****************************************************************************/
  71
  72 #define BITS_BIG_ENDIAN  0
  73
  74 #define BYTES_BIG_ENDIAN 0
  75
  76 #define WORDS_BIG_ENDIAN 0
  77
  78 #define UNITS_PER_WORD 4
  79
  80 #define POINTER_SIZE 32
  81
  82 #define PARM_BOUNDARY 32
  83
  84 #define STACK_BOUNDARY 32
  85
  86 #define FUNCTION_BOUNDARY 32
  87
  88 #define STRUCTURE_SIZE_BOUNDARY 32
  89
  90 #define BIGGEST_ALIGNMENT 32
  91
  92 /* In CRX arrays of chars are word-aligned, so strcpy() will be faster.  */
  93 #define DATA_ALIGNMENT(TYPE, ALIGN) \
  94   (TREE_CODE (TYPE) == ARRAY_TYPE && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
  95    && (ALIGN) < BITS_PER_WORD \
  96    ? (BITS_PER_WORD) : (ALIGN))
  97
  98 /* In CRX strings are word-aligned so strcpy from constants will be faster. */
  99 #define CONSTANT_ALIGNMENT(CONSTANT, ALIGN) \
 100   (TREE_CODE (CONSTANT) == STRING_CST && (ALIGN) < BITS_PER_WORD \
 101    ? (BITS_PER_WORD) : (ALIGN))
 102
 103 #define STRICT_ALIGNMENT 0
 104
 105 #define PCC_BITFIELD_TYPE_MATTERS 1
 106
 107 /*****************************************************************************/
 108 /* LAYOUT OF SOURCE LANGUAGE DATA TYPES                                      */
 109 /*****************************************************************************/
 110
 111 #define INT_TYPE_SIZE           32
 112
 113 #define SHORT_TYPE_SIZE         16
 114
 115 #define LONG_TYPE_SIZE          32
 116
 117 #define LONG_LONG_TYPE_SIZE     64
 118
 119 #define FLOAT_TYPE_SIZE         32
 120
 121 #define DOUBLE_TYPE_SIZE        64
 122
 123 #define LONG_DOUBLE_TYPE_SIZE   64
 124
 125 #define DEFAULT_SIGNED_CHAR     1
 126
 127 #define SIZE_TYPE               "unsigned int"
 128
 129 #define PTRDIFF_TYPE            "int"
 130
 131 /*****************************************************************************/
 132 /* REGISTER USAGE.                                                           */
 133 /*****************************************************************************/
 134
 135 #define FIRST_PSEUDO_REGISTER   19
 136
 137 /* On the CRX, only the stack pointer (r15) is such. */
 138 #define FIXED_REGISTERS \
 139   { \
 140  /* r0  r1  r2  r3  r4  r5  r6  r7  r8  r9  r10 */  \
 141     0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,      \
 142  /* r11 r12 r13 ra  sp  r16 r17 cc */               \
 143     0,  0,  0,  0,  1,  0,  0,  1                   \
 144   }
 145
 146 /* On the CRX, calls clobbers r0-r6 (scratch registers), ra (the return address)
 147  * and sp - (the stack pointer which is fixed). */
 148 #define CALL_USED_REGISTERS \
 149   { \
 150  /* r0  r1  r2  r3  r4  r5  r6  r7  r8  r9  r10 */  \
 151     1,  1,  1,  1,  1,  1,  1,  0,  0,  0,  0,      \
 152  /* r11 r12 r13 ra  sp  r16 r17 cc */               \
 153     0,  0,  0,  1,  1,  1,  1,  1                   \
 154   }
 155
 156 #define HARD_REGNO_NREGS(REGNO, MODE) \
 157     ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 158
 159 /* On the CRX architecture, HILO regs can only hold SI mode. */
 160 #define HARD_REGNO_MODE_OK(REGNO, MODE) crx_hard_regno_mode_ok(REGNO, MODE)
 161
 162 /* So far no patterns for moving CCMODE data are available */
 163 #define AVOID_CCMODE_COPIES
 164
 165 /* Interrupt functions can only use registers that have already been saved by
 166  * the prologue, even if they would normally be call-clobbered. */
 167 #define HARD_REGNO_RENAME_OK(SRC, DEST) \
 168         (!crx_interrupt_function_p () || regs_ever_live[DEST])
 169
 170 #define MODES_TIEABLE_P(MODE1, MODE2)  1
 171
 172 enum reg_class
 173 {
 174   NO_REGS,
 175   LO_REGS,
 176   HI_REGS,
 177   HILO_REGS,
 178   NOSP_REGS,
 179   GENERAL_REGS,
 180   ALL_REGS,
 181   LIM_REG_CLASSES
 182 };
 183
 184 #define N_REG_CLASSES (int) LIM_REG_CLASSES
 185
 186 #define REG_CLASS_NAMES \
 187   {                     \
 188     "NO_REGS",          \
 189     "LO_REGS",          \
 190     "HI_REGS",          \
 191     "HILO_REGS",        \
 192     "NOSP_REGS",        \
 193     "GENERAL_REGS",     \
 194     "ALL_REGS"          \
 195   }
 196
 197 #define REG_CLASS_CONTENTS                              \
 198   {                                                     \
 199     {0x00000000}, /* NO_REGS                    */      \
 200     {0x00010000}, /* LO_REGS :          16      */      \
 201     {0x00020000}, /* HI_REGS :          17      */      \
 202     {0x00030000}, /* HILO_REGS :        16, 17  */      \
 203     {0x00007fff}, /* NOSP_REGS :        0 - 14  */      \
 204     {0x0000ffff}, /* GENERAL_REGS :     0 - 15  */      \
 205     {0x0007ffff}  /* ALL_REGS :         0 - 18  */      \
 206   }
 207
 208 #define REGNO_REG_CLASS(REGNO)  crx_regno_reg_class(REGNO)
 209
 210 #define BASE_REG_CLASS          GENERAL_REGS
 211
 212 #define INDEX_REG_CLASS         GENERAL_REGS
 213
 214 #define REG_CLASS_FROM_LETTER(C)        \
 215   ((C) == 'b' ? NOSP_REGS :             \
 216    (C) == 'l' ? LO_REGS :               \
 217    (C) == 'h' ? HI_REGS :               \
 218    (C) == 'k' ? HILO_REGS :             \
 219   NO_REGS)
 220
 221 #define REGNO_OK_FOR_BASE_P(REGNO) \
 222   ((REGNO) < 16 \
 223    || (reg_renumber && (unsigned)reg_renumber[REGNO] < 16))
 224
 225 #define REGNO_OK_FOR_INDEX_P(REGNO)        REGNO_OK_FOR_BASE_P(REGNO)
 226
 227 #define PREFERRED_RELOAD_CLASS(X,CLASS) CLASS
 228
 229 #define SECONDARY_RELOAD_CLASS(CLASS, MODE, X) \
 230   crx_secondary_reload_class (CLASS, MODE, X)
 231
 232 #define CLASS_MAX_NREGS(CLASS, MODE) \
 233     (GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD
 234
 235 #define SIGNED_INT_FITS_N_BITS(imm, N) \
 236   ((((imm) < ((long long)1<<((N)-1))) && ((imm) >= -((long long)1<<((N)-1)))) ? 1 : 0)
 237
 238 #define UNSIGNED_INT_FITS_N_BITS(imm, N) \
 239   (((imm) < ((long long)1<<(N)) && (imm) >= (long long)0) ? 1 : 0)
 240
 241 #define HILO_REGNO_P(regno) \
 242   (reg_classes_intersect_p(REGNO_REG_CLASS(regno), HILO_REGS))
 243
 244 #define INT_CST4(VALUE) \
 245   (((VALUE) >= -1 && (VALUE) <= 4) || (VALUE) == -4 \
 246   || (VALUE) == 7 || (VALUE) == 8 || (VALUE) == 16 || (VALUE) == 32 \
 247   || (VALUE) == 20 || (VALUE) == 12 || (VALUE) == 48)
 248
 249 #define CONST_OK_FOR_LETTER_P(VALUE, C)                         \
 250   /* Legal const for store immediate instructions */            \
 251   ((C) == 'I' ? UNSIGNED_INT_FITS_N_BITS(VALUE, 3) :            \
 252    (C) == 'J' ? UNSIGNED_INT_FITS_N_BITS(VALUE, 4) :            \
 253    (C) == 'K' ? UNSIGNED_INT_FITS_N_BITS(VALUE, 5) :            \
 254    (C) == 'L' ? INT_CST4(VALUE) :                               \
 255   0)
 256
 257 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C)  \
 258   ((C) == 'G' ? crx_const_double_ok (VALUE) :   \
 259   0)
 260
 261 /*****************************************************************************/
 262 /* STACK LAYOUT AND CALLING CONVENTIONS.                                     */
 263 /*****************************************************************************/
 264
 265 #define STACK_GROWS_DOWNWARD
 266
 267 #define STARTING_FRAME_OFFSET  0
 268
 269 #define STACK_POINTER_REGNUM    15
 270
 271 #define FRAME_POINTER_REGNUM    13
 272
 273 #define ARG_POINTER_REGNUM      12
 274
 275 #define STATIC_CHAIN_REGNUM     1
 276
 277 #define RETURN_ADDRESS_REGNUM   14
 278
 279 #define FIRST_PARM_OFFSET(FNDECL)  0
 280
 281 #define FRAME_POINTER_REQUIRED (current_function_calls_alloca)
 282
 283 #define ELIMINABLE_REGS \
 284   { \
 285     { ARG_POINTER_REGNUM,   STACK_POINTER_REGNUM}, \
 286     { ARG_POINTER_REGNUM,   FRAME_POINTER_REGNUM}, \
 287     { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}  \
 288   }
 289
 290 #define CAN_ELIMINATE(FROM, TO) \
 291  ((TO) == STACK_POINTER_REGNUM ? ! frame_pointer_needed : 1)
 292
 293 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET)                    \
 294   do {                                                                  \
 295     (OFFSET) = crx_initial_elimination_offset ((FROM), (TO));           \
 296   } while (0)
 297
 298 /*****************************************************************************/
 299 /* PASSING FUNCTION ARGUMENTS                                                */
 300 /*****************************************************************************/
 301
 302 #define ACCUMULATE_OUTGOING_ARGS (TARGET_NO_PUSH_ARGS)
 303
 304 #define PUSH_ARGS (!TARGET_NO_PUSH_ARGS)
 305
 306 #define PUSH_ROUNDING(BYTES) (((BYTES) + 3) & ~3)
 307
 308 #define RETURN_POPS_ARGS(FNDECL, FUNTYPE, SIZE)   0
 309
 310 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) \
 311   ((rtx) crx_function_arg(&(CUM), (MODE), (TYPE), (NAMED)))
 312
 313 #ifndef CUMULATIVE_ARGS
 314 struct cumulative_args
 315 {
 316   int ints;
 317 };
 318
 319 #define CUMULATIVE_ARGS struct cumulative_args
 320 #endif
 321
 322 /* On the CRX architecture, Varargs routines should receive their parameters on
 323  * the stack.  */
 324
 325 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, FNDECL, N_NAMED_ARGS) \
 326   crx_init_cumulative_args(&(CUM), (FNTYPE), (LIBNAME))
 327
 328 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
 329   crx_function_arg_advance(&(CUM), (MODE), (TYPE), (NAMED))
 330
 331 #define FUNCTION_ARG_REGNO_P(REGNO)  crx_function_arg_regno_p(REGNO)
 332
 333 /*****************************************************************************/
 334 /* RETURNING FUNCTION VALUE                                                  */
 335 /*****************************************************************************/
 336
 337 /* On the CRX, the return value is in R0 */
 338
 339 #define FUNCTION_VALUE(VALTYPE, FUNC) \
 340         gen_rtx_REG(TYPE_MODE (VALTYPE), 0)
 341
 342 #define LIBCALL_VALUE(MODE)     gen_rtx_REG (MODE, 0)
 343
 344 #define FUNCTION_VALUE_REGNO_P(N)       ((N) == 0)
 345
 346 #define CRX_STRUCT_VALUE_REGNUM  0
 347
 348 /*****************************************************************************/
 349 /* GENERATING CODE FOR PROFILING - NOT IMPLEMENTED                           */
 350 /*****************************************************************************/
 351
 352 #undef  FUNCTION_PROFILER
 353 #define FUNCTION_PROFILER(STREAM, LABELNO)      \
 354 {                                               \
 355     sorry ("Profiler support for CRX");         \
 356 }
 357
 358 /*****************************************************************************/
 359 /* TRAMPOLINES FOR NESTED FUNCTIONS - NOT SUPPORTED                          */
 360 /*****************************************************************************/
 361
 362 #define TRAMPOLINE_SIZE 32
 363
 364 #define INITIALIZE_TRAMPOLINE(addr, fnaddr, static_chain)       \
 365 {                                                               \
 366     sorry ("Trampoline support for CRX");                       \
 367 }
 368
 369 /*****************************************************************************/
 370 /* ADDRESSING MODES                                                          */
 371 /*****************************************************************************/
 372
 373 #define CONSTANT_ADDRESS_P(X)                                           \
 374   (GET_CODE (X) == LABEL_REF                                            \
 375    || GET_CODE (X) == SYMBOL_REF                                        \
 376    || GET_CODE (X) == CONST                                             \
 377    || GET_CODE (X) == CONST_INT)
 378
 379 #define MAX_REGS_PER_ADDRESS 2
 380
 381 #define HAVE_POST_INCREMENT  1
 382 #define HAVE_POST_DECREMENT  1
 383 #define HAVE_POST_MODIFY_DISP 1
 384 #define HAVE_POST_MODIFY_REG 0
 385
 386 #ifdef REG_OK_STRICT
 387 #define REG_OK_FOR_BASE_P(X)    REGNO_OK_FOR_BASE_P (REGNO (X))
 388 #define REG_OK_FOR_INDEX_P(X)   REGNO_OK_FOR_INDEX_P (REGNO (X))
 389 #else
 390 #define REG_OK_FOR_BASE_P(X)    1
 391 #define REG_OK_FOR_INDEX_P(X)   1
 392 #endif /* REG_OK_STRICT */
 393
 394 #ifdef REG_OK_STRICT
 395 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL)                        \
 396 {                                                                       \
 397   if (crx_legitimate_address_p (MODE, X, 1))                            \
 398       goto LABEL;                                                       \
 399 }
 400 #else
 401 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, LABEL)                        \
 402 {                                                                       \
 403   if (crx_legitimate_address_p (MODE, X, 0))                            \
 404       goto LABEL;                                                       \
 405 }
 406 #endif /* REG_OK_STRICT */
 407
 408 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL)
 409
 410 #define LEGITIMATE_CONSTANT_P(X)  1
 411
 412 /*****************************************************************************/
 413 /* CONDITION CODE STATUS                                                     */
 414 /*****************************************************************************/
 415
 416 /*****************************************************************************/
 417 /* RELATIVE COSTS OF OPERATIONS                                              */
 418 /*****************************************************************************/
 419
 420 #define MEMORY_MOVE_COST(MODE, CLASS, IN) crx_memory_move_cost(MODE, CLASS, IN)
 421 /* Moving to processor register flushes pipeline - thus asymmetric */
 422 #define REGISTER_MOVE_COST(MODE, FROM, TO) ((TO != GENERAL_REGS) ? 8 : 2)
 423 /* Assume best case (branch predicted) */
 424 #define BRANCH_COST 2
 425
 426 #define SLOW_BYTE_ACCESS  1
 427
 428 /*****************************************************************************/
 429 /* DIVIDING THE OUTPUT INTO SECTIONS                                         */
 430 /*****************************************************************************/
 431
 432 #define TEXT_SECTION_ASM_OP     "\t.section\t.text"
 433
 434 #define DATA_SECTION_ASM_OP     "\t.section\t.data"
 435
 436 #define BSS_SECTION_ASM_OP      "\t.section\t.bss"
 437
 438 /*****************************************************************************/
 439 /* POSITION INDEPENDENT CODE                                                 */
 440 /*****************************************************************************/
 441
 442 #define PIC_OFFSET_TABLE_REGNUM  12
 443
 444 #define LEGITIMATE_PIC_OPERAND_P(X)  1
 445
 446 /*****************************************************************************/
 447 /* ASSEMBLER FORMAT                                                          */
 448 /*****************************************************************************/
 449
 450 #define GLOBAL_ASM_OP "\t.globl\t"
 451
 452 #undef  USER_LABEL_PREFIX
 453 #define USER_LABEL_PREFIX "_"
 454
 455 #undef  ASM_OUTPUT_LABELREF
 456 #define ASM_OUTPUT_LABELREF(STREAM, NAME) \
 457   asm_fprintf (STREAM, "%U%s", (*targetm.strip_name_encoding) (NAME));
 458
 459 #undef  ASM_APP_ON
 460 #define ASM_APP_ON   "#APP\n"
 461
 462 #undef  ASM_APP_OFF
 463 #define ASM_APP_OFF  "#NO_APP\n"
 464
 465 /*****************************************************************************/
 466 /* INSTRUCTION OUTPUT                                                        */
 467 /*****************************************************************************/
 468
 469 #define REGISTER_NAMES \
 470   { \
 471     "r0",  "r1",  "r2",  "r3",  "r4",  "r5",  "r6",  "r7", \
 472     "r8",  "r9",  "r10", "r11", "r12", "r13", "ra",  "sp", \
 473     "lo",  "hi",  "cc" \
 474   }
 475
 476 #define PRINT_OPERAND(STREAM, X, CODE) \
 477   crx_print_operand(STREAM, X, CODE)
 478
 479 #define PRINT_OPERAND_ADDRESS(STREAM, ADDR) \
 480   crx_print_operand_address(STREAM, ADDR)
 481
 482 /*****************************************************************************/
 483 /* OUTPUT OF DISPATCH TABLES                                                 */
 484 /*****************************************************************************/
 485
 486 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
 487   asm_fprintf ((STREAM), "\t.long\t.L%d\n", (VALUE))
 488
 489 /*****************************************************************************/
 490 /* ALIGNMENT IN ASSEMBLER FILE                                               */
 491 /*****************************************************************************/
 492
 493 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
 494   asm_fprintf ((STREAM), "\t.align\t%d\n", 1 << (POWER))
 495
 496 /*****************************************************************************/
 497 /* MISCELLANEOUS PARAMETERS                                                  */
 498 /*****************************************************************************/
 499
 500 #define CASE_VECTOR_MODE  Pmode
 501
 502 #define MOVE_MAX 4
 503
 504 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC)  1
 505
 506 #define STORE_FLAG_VALUE  1
 507
 508 #define Pmode           SImode
 509
 510 #define FUNCTION_MODE   QImode
 511
 512 /*****************************************************************************/
 513 /* EXTERNAL DECLARATIONS FOR VARIABLES DEFINED IN CRX.C                      */
 514 /*****************************************************************************/
 515
 516 extern rtx crx_compare_op0;    /* operand 0 for comparisons */
 517 extern rtx crx_compare_op1;    /* operand 1 for comparisons */
 518
 519 #endif /* ! GCC_CRX_H */