gcc/config/tilegx/tilegx.h

   1 /* Definitions of target machine for GNU compiler for TILE-Gx.
   2    Copyright (C) 2011-2020 Free Software Foundation, Inc.
   3    Contributed by Walter Lee (walt@tilera.com)
   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 3, 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 COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 /* Default target_flags if no switches are specified  */
  22 #ifndef TARGET_DEFAULT
  23 #define TARGET_DEFAULT 0
  24 #endif
  25
  26 #ifndef TARGET_BIG_ENDIAN_DEFAULT
  27 #define TARGET_BIG_ENDIAN_DEFAULT 0
  28 #endif
  29
  30 #ifndef TARGET_ENDIAN_DEFAULT
  31 #if TARGET_BIG_ENDIAN_DEFAULT
  32 #define TARGET_ENDIAN_DEFAULT MASK_BIG_ENDIAN
  33 #else
  34 #define TARGET_ENDIAN_DEFAULT 0
  35 #endif
  36 #endif
  37
  38 /* This is used by tilegx_cpu_cpp_builtins to indicate the byte order
  39    we're compiling for.  */
  40 #define TILEGX_CPU_CPP_ENDIAN_BUILTINS()        \
  41   do                                            \
  42     {                                           \
  43       if (TARGET_BIG_ENDIAN)                    \
  44         builtin_define ("__BIG_ENDIAN__");      \
  45       else                                      \
  46         builtin_define ("__LITTLE_ENDIAN__");   \
  47     }                                           \
  48   while (0)
  49
  50 #include "config/tilegx/tilegx-opts.h"
  51
  52
  53 /* Target CPU builtins.  */
  54 #define TARGET_CPU_CPP_BUILTINS() \
  55   tilegx_cpu_cpp_builtins (pfile)
  56
  57 #undef PTRDIFF_TYPE
  58 #define PTRDIFF_TYPE (TARGET_32BIT ? "int" : "long int")
  59
  60 #undef SIZE_TYPE
  61 #define SIZE_TYPE (TARGET_32BIT ? "unsigned int" : "long unsigned int")
  62
  63 #undef WCHAR_TYPE
  64 #define WCHAR_TYPE "int"
  65
  66 #undef WCHAR_TYPE_SIZE
  67 #define WCHAR_TYPE_SIZE 32
  68 \f
  69
  70 /* Target machine storage layout */
  71
  72 #define BITS_BIG_ENDIAN 0
  73 #define BYTES_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
  74 #define WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
  75 #define FLOAT_WORDS_BIG_ENDIAN (TARGET_BIG_ENDIAN != 0)
  76
  77 #define UNITS_PER_WORD 8
  78 #define PARM_BOUNDARY BITS_PER_WORD
  79 #define STACK_BOUNDARY 128
  80 #define FUNCTION_BOUNDARY 64
  81 #define BIGGEST_ALIGNMENT 128
  82 #define STRICT_ALIGNMENT 1
  83
  84 #define INT_TYPE_SIZE         32
  85 #define LONG_TYPE_SIZE        (TARGET_32BIT ? 32 : 64)
  86 #define LONG_LONG_TYPE_SIZE   64
  87 #define FLOAT_TYPE_SIZE       32
  88 #define DOUBLE_TYPE_SIZE      64
  89 #define LONG_DOUBLE_TYPE_SIZE 64
  90 #define POINTER_SIZE          LONG_TYPE_SIZE
  91
  92 #define PCC_BITFIELD_TYPE_MATTERS 1
  93 #define FASTEST_ALIGNMENT 64
  94 #define BIGGEST_FIELD_ALIGNMENT 128
  95 #define WIDEST_HARDWARE_FP_SIZE 64
  96
  97 /* Make arrays of chars word-aligned for the same reasons.  */
  98 #define DATA_ALIGNMENT(TYPE, ALIGN)             \
  99   (TREE_CODE (TYPE) == ARRAY_TYPE               \
 100    && TYPE_MODE (TREE_TYPE (TYPE)) == QImode    \
 101    && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
 102
 103 /* Make local arrays of chars word-aligned for the same reasons.  */
 104 #define LOCAL_ALIGNMENT(TYPE, ALIGN) DATA_ALIGNMENT (TYPE, ALIGN)
 105 \f
 106
 107 /* Standard register usage.  */
 108
 109 #define FIRST_PSEUDO_REGISTER (64 + 4)
 110
 111 #define FIXED_REGISTERS \
 112  {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
 113   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
 114   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
 115   0, 0, 0, 0, 0, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, \
 116   1, 1, 1, 1}
 117 #define CALL_REALLY_USED_REGISTERS \
 118  {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
 119   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, \
 120   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
 121   0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, \
 122   1, 1, 1, 1}
 123
 124 #define REG_ALLOC_ORDER {                               \
 125       10, 11, 12, 13, 14, /* call used */               \
 126       15, 16, 17, 18, 19,                               \
 127       20, 21, 22, 23, 24,                               \
 128       25, 26, 27, 28, 29,                               \
 129                                                         \
 130       9, 8, 7, 6, 5,      /* argument */                \
 131       4, 3, 2, 1, 0,                                    \
 132                                                         \
 133       55,                 /* return address */          \
 134                                                         \
 135       30, 31, 32, 33, 34, /* call saved registers */    \
 136       35, 36, 37, 38, 39,                               \
 137       40, 41, 42, 43, 44,                               \
 138       45, 46, 47, 48, 49,                               \
 139       50, 51,                                           \
 140                                                         \
 141       52,                 /* hard frame pointer */      \
 142       53, 54,             /* tp, sp */                  \
 143                                                         \
 144       56, 57, 58, 59, 60, /* special purpose */         \
 145       61, 62, 63, 64, 65, /* or fake registers */       \
 146       66, 67                                            \
 147 }
 148
 149 /* Register that holds an address into the text segment that can be
 150    used by pic code.  */
 151 #define TILEGX_PIC_TEXT_LABEL_REGNUM (flag_pic ? 50 : INVALID_REGNUM)
 152 #define PIC_OFFSET_TABLE_REGNUM (flag_pic ? 51 : INVALID_REGNUM)
 153 #define HARD_FRAME_POINTER_REGNUM 52
 154 #define THREAD_POINTER_REGNUM 53
 155 #define STACK_POINTER_REGNUM 54
 156 #define TILEGX_LINK_REGNUM 55
 157 #define FRAME_POINTER_REGNUM 64
 158 #define ARG_POINTER_REGNUM 65
 159 /* SPR storing the comparison value for compare and exchange.  */
 160 #define TILEGX_CMPEXCH_REGNUM 66
 161 /* Pseudo registers used to enforce order between instructions that
 162    touch the networks.  */
 163 #define TILEGX_NETORDER_REGNUM 67
 164 #define STATIC_CHAIN_REGNUM 10
 165 \f
 166
 167 enum reg_class
 168 {
 169   NO_REGS,
 170   R0_REGS,
 171   R1_REGS,
 172   R2_REGS,
 173   R3_REGS,
 174   R4_REGS,
 175   R5_REGS,
 176   R6_REGS,
 177   R7_REGS,
 178   R8_REGS,
 179   R9_REGS,
 180   R10_REGS,
 181   ALL_REGS,
 182   LIM_REG_CLASSES
 183 };
 184
 185 #define N_REG_CLASSES (int) LIM_REG_CLASSES
 186
 187 /* Since GENERAL_REGS is the same class as ALL_REGS, don't give it a
 188    different class number; just make it an alias.  */
 189 #define GENERAL_REGS ALL_REGS
 190
 191 #define REG_CLASS_NAMES \
 192   { \
 193     "NO_REGS", \
 194     "R0_REGS", \
 195     "R1_REGS", \
 196     "R2_REGS", \
 197     "R3_REGS", \
 198     "R4_REGS", \
 199     "R5_REGS", \
 200     "R6_REGS", \
 201     "R7_REGS", \
 202     "R8_REGS", \
 203     "R9_REGS", \
 204     "R10_REGS", \
 205     "ALL_REGS" \
 206   }
 207
 208 #define REG_CLASS_CONTENTS \
 209   { \
 210     { 0 }, \
 211     { 1 << 0 }, \
 212     { 1 << 1 }, \
 213     { 1 << 2 }, \
 214     { 1 << 3 }, \
 215     { 1 << 4 }, \
 216     { 1 << 5 }, \
 217     { 1 << 6 }, \
 218     { 1 << 7 }, \
 219     { 1 << 8 }, \
 220     { 1 << 9 }, \
 221     { 1 << 10 }, \
 222     { 0xffffffff, 0xffffffff } \
 223   }
 224
 225 #define REGNO_REG_CLASS(REGNO) \
 226   ((unsigned)(REGNO) <= 10 ? \
 227    (enum reg_class)(R0_REGS + (REGNO)) : ALL_REGS)
 228
 229 #define INDEX_REG_CLASS NO_REGS
 230 #define BASE_REG_CLASS ALL_REGS
 231
 232 #define PREFERRED_RELOAD_CLASS(X,CLASS)  (CLASS)
 233
 234 #define CLASS_MAX_NREGS(CLASS, MODE)    \
 235  ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
 236 \f
 237
 238 /* Stack layout; function entry, exit and calling.  */
 239
 240 #define STACK_GROWS_DOWNWARD 1
 241 #define FRAME_GROWS_DOWNWARD 1
 242
 243 #define DYNAMIC_CHAIN_ADDRESS(FRAME) \
 244   plus_constant (Pmode, (FRAME), UNITS_PER_WORD)
 245
 246 #define FIRST_PARM_OFFSET(FNDECL) 0
 247
 248 #define ACCUMULATE_OUTGOING_ARGS 1
 249
 250 #define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
 251
 252 #define INCOMING_FRAME_SP_OFFSET 0
 253
 254 #define STACK_POINTER_OFFSET (2 * UNITS_PER_WORD)
 255
 256 #define ARG_POINTER_CFA_OFFSET(FNDECL) (-STACK_POINTER_OFFSET)
 257
 258 #define DEFAULT_PCC_STRUCT_RETURN 0
 259
 260 /* The first 10 registers may hold return value.  */
 261 #define TILEGX_NUM_RETURN_REGS 10
 262
 263 /* The first 10 registers hold function arguments.  */
 264 #define TILEGX_NUM_ARG_REGS 10
 265
 266 #define FUNCTION_ARG_REGNO_P(N) ((N) < TILEGX_NUM_ARG_REGS)
 267
 268 /* The type used to store the number of words of arguments scanned so
 269    far during argument scanning.  This includes any space that is
 270    skipped.  */
 271 #define CUMULATIVE_ARGS int
 272
 273 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
 274  ((CUM) = 0)
 275 \f
 276
 277 #define ELIMINABLE_REGS                                 \
 278   {{ARG_POINTER_REGNUM,  STACK_POINTER_REGNUM},         \
 279   {ARG_POINTER_REGNUM,   HARD_FRAME_POINTER_REGNUM},    \
 280   {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM},         \
 281   {FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}}
 282
 283 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
 284   ((OFFSET) = tilegx_initial_elimination_offset((FROM),(TO)))
 285
 286 #define PROFILE_BEFORE_PROLOGUE 1
 287
 288 #define FUNCTION_PROFILER(FILE, LABELNO) \
 289   tilegx_function_profiler (FILE, LABELNO)
 290
 291 #define TRAMPOLINE_SIZE (TARGET_32BIT ? 48 : 56)
 292 #define TRAMPOLINE_ALIGNMENT 64
 293 #define TRAMPOLINE_SECTION text_section
 294 \f
 295
 296 /* Call frame debugging information.  */
 297
 298 #define INCOMING_RETURN_ADDR_RTX  gen_rtx_REG (Pmode, TILEGX_LINK_REGNUM)
 299
 300 #define RETURN_ADDR_RTX tilegx_return_addr
 301
 302 #define DWARF_FRAME_RETURN_COLUMN DWARF_FRAME_REGNUM (TILEGX_LINK_REGNUM)
 303
 304 #define DWARF_ZERO_REG 63
 305
 306 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N + 12) : INVALID_REGNUM)
 307 #define EH_RETURN_STACKADJ_RTX  gen_rtx_REG (Pmode, 11)
 308 #define EH_RETURN_HANDLER_RTX tilegx_eh_return_handler_rtx ()
 309
 310 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
 311   tilegx_asm_preferred_eh_data_format ((CODE), (GLOBAL))
 312 \f
 313
 314 /* Addressing modes, and classification of registers for them.  */
 315
 316 #define HAVE_POST_INCREMENT 1
 317 #define HAVE_POST_DECREMENT 1
 318 #define HAVE_POST_MODIFY_DISP 1
 319
 320 #define REGNO_OK_FOR_INDEX_P(regno) 0
 321 #define REGNO_OK_FOR_BASE_P(regno)      \
 322   ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
 323
 324 #define MAX_REGS_PER_ADDRESS 1
 325
 326 #define CONSTANT_ADDRESS_P(X) 0
 327
 328 #define LEGITIMATE_PIC_OPERAND_P(X) tilegx_legitimate_pic_operand_p (X)
 329 \f
 330
 331 #define CASE_VECTOR_MODE Pmode
 332 #define CASE_VECTOR_PC_RELATIVE 0
 333 #define JUMP_TABLES_IN_TEXT_SECTION 0
 334
 335 #define DEFAULT_SIGNED_CHAR 1
 336
 337 #define MOVE_MAX UNITS_PER_WORD
 338
 339 /* Use a value of 11 for MOVE_RATIO and friends, because TILEPro
 340    returns structs as large as 10 words in registers.  Because of some
 341    some code generation inefficiency, we never get smaller code for
 342    turning that into a memcpy, so pick a value that guarantees this
 343    doesn't happen.  */
 344 #define TILEGX_CALL_RATIO 11
 345 #define MOVE_RATIO(speed) ((speed) ? 15 : TILEGX_CALL_RATIO)
 346 #define CLEAR_RATIO(speed) ((speed) ? 15 : TILEGX_CALL_RATIO)
 347 #define SET_RATIO(speed) ((speed) ? 15 : TILEGX_CALL_RATIO)
 348
 349 #define WORD_REGISTER_OPERATIONS 1
 350
 351 #define LOAD_EXTEND_OP(MODE) ((MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND)
 352
 353 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE)     \
 354   if (GET_MODE_CLASS (MODE) == MODE_INT         \
 355       && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
 356     {                                           \
 357       if ((MODE) == SImode)                     \
 358         (UNSIGNEDP) = 0;                        \
 359       (MODE) = DImode;                          \
 360     }
 361
 362 /* Define SLOW_BYTE_ACCESS to avoid making a QI or HI mode
 363    register.  */
 364 #define SLOW_BYTE_ACCESS 1
 365
 366 #define SHIFT_COUNT_TRUNCATED 0
 367
 368 #define SHORT_IMMEDIATES_SIGN_EXTEND 1
 369
 370 #define CLZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, 1)
 371 #define CTZ_DEFINED_VALUE_AT_ZERO(MODE, VALUE) ((VALUE) = 64, 1)
 372
 373 #define Pmode (TARGET_32BIT ? SImode : DImode)
 374
 375 #define STACK_SIZE_MODE Pmode
 376
 377 #define STORE_FLAG_VALUE 1
 378
 379 #define FUNCTION_MODE DImode
 380
 381 #define NO_FUNCTION_CSE 1
 382
 383 #define ADJUST_INSN_LENGTH(INSN, LENGTH) \
 384   ((LENGTH) = tilegx_adjust_insn_length ((INSN), (LENGTH)))
 385
 386 #define TARGET_FLOAT_FORMAT IEEE_FLOAT_FORMAT
 387
 388 #define BRANCH_COST(speed_p, predictable_p) ((predictable_p) ? 2 : 6)
 389 \f
 390
 391 /* Control the assembler format that we output.  */
 392
 393 #undef NO_DOLLAR_IN_LABEL
 394
 395 #define ASM_COMMENT_START "##"
 396
 397 #define TEXT_SECTION_ASM_OP "\t.text"
 398
 399 #define DATA_SECTION_ASM_OP "\t.data"
 400
 401 #undef READONLY_DATA_SECTION_ASM_OP
 402 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata, \"a\""
 403
 404 #undef BSS_SECTION_ASM_OP
 405 #define BSS_SECTION_ASM_OP      "\t.section\t.bss, \"wa\""
 406
 407 #undef INIT_SECTION_ASM_OP
 408 #define INIT_SECTION_ASM_OP     "\t.section\t.init, \"ax\""
 409
 410 #undef FINI_SECTION_ASM_OP
 411 #define FINI_SECTION_ASM_OP     "\t.section\t.fini, \"ax\""
 412
 413 #define GLOBAL_ASM_OP ".global "
 414
 415 #define SUPPORTS_WEAK 1
 416
 417 #define USER_LABEL_PREFIX ""
 418
 419 #define REGISTER_PREFIX ""
 420 #define REGISTER_NAMES                                                  \
 421   { "r0",   "r1",   "r2",   "r3",   "r4",   "r5",   "r6",   "r7",       \
 422     "r8",   "r9",   "r10",  "r11",  "r12",  "r13",  "r14",  "r15",      \
 423     "r16",  "r17",  "r18",  "r19",  "r20",  "r21",  "r22",  "r23",      \
 424     "r24",  "r25",  "r26",  "r27",  "r28",  "r29",  "r30",  "r31",      \
 425     "r32",  "r33",  "r34",  "r35",  "r36",  "r37",  "r38",  "r39",      \
 426     "r40",  "r41",  "r42",  "r43",  "r44",  "r45",  "r46",  "r47",      \
 427     "r48",  "r49",  "r50",  "r51",  "r52",  "tp",   "sp",   "lr",       \
 428     "?r56?","idn0", "idn1", "udn0", "udn1", "udn2", "udn3", "zero",     \
 429     "?FRAME?", "?ARG?", "?CMPEXCH?", "?NET?" }
 430
 431 #define FINAL_PRESCAN_INSN(INSN, OPVEC, NOPERANDS) \
 432   tilegx_final_prescan_insn (insn)
 433
 434 #define ASM_OUTPUT_OPCODE(STREAM, PTR)  \
 435   (PTR = tilegx_asm_output_opcode (STREAM, PTR))
 436
 437 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE)                    \
 438   do                                                            \
 439     {                                                           \
 440       char label[256];                                          \
 441       ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));        \
 442       fprintf (FILE, "%s ",                                     \
 443                integer_asm_op (GET_MODE_SIZE (Pmode), TRUE));   \
 444       assemble_name (FILE, label);                              \
 445       fprintf (FILE, "\n");                                     \
 446     }                                                           \
 447   while (0)
 448
 449 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL)        \
 450   do                                                            \
 451     {                                                           \
 452       char label[256];                                          \
 453       ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));        \
 454       fprintf (FILE, "%s ",                                     \
 455                integer_asm_op (GET_MODE_SIZE (Pmode), TRUE));   \
 456       assemble_name (FILE, label);                              \
 457       ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL));          \
 458       fprintf (FILE, "-");                                      \
 459       assemble_name (FILE, label);                              \
 460       fprintf (FILE, "\n");                                     \
 461     }                                                           \
 462   while (0)
 463
 464 #define ASM_OUTPUT_ALIGN(FILE,LOG)  \
 465   do { if ((LOG) != 0) fprintf (FILE, "\t.align %d\n", 1 << (LOG)); } while (0)
 466
 467 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED)    \
 468   ( fputs (".comm ", (FILE)),                           \
 469     assemble_name ((FILE), (NAME)),                     \
 470     fprintf ((FILE), ",%u\n", (unsigned int)(ROUNDED)))
 471
 472 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED)     \
 473   ( fputs (".lcomm ", (FILE)),                          \
 474     assemble_name ((FILE), (NAME)),                     \
 475     fprintf ((FILE), ",%u\n", (unsigned int)(ROUNDED)))
 476
 477 #define CRT_CALL_STATIC_FUNCTION(SECTION_OP, FUNC)              \
 478 static void __attribute__((__used__))                           \
 479 call_ ## FUNC (void)                                            \
 480 {                                                               \
 481   asm (SECTION_OP);                                             \
 482   asm ("{ moveli r0, hw2_last(" #FUNC " - . - 8); lnk r1 }\n"); \
 483   asm ("shl16insli r0, r0, hw1(" #FUNC " - .)\n");              \
 484   asm ("shl16insli r0, r0, hw0(" #FUNC " - . + 8)\n");          \
 485   asm ("add r0, r1, r0\n");                                     \
 486   asm ("jalr r0\n");                                            \
 487   asm (TEXT_SECTION_ASM_OP);                                    \
 488 }
 489
 490 \f
 491
 492 #define INIT_EXPANDERS tilegx_init_expanders ()
 493
 494 /* A C structure for machine-specific, per-function data.  This is
 495    added to the cfun structure.  */
 496 typedef struct GTY(()) machine_function
 497 {
 498   /* Symbol for the text label used for pic.  */
 499   rtx text_label_symbol;
 500
 501   /* Register for the text label.  */
 502   rtx text_label_rtx;
 503
 504   /* Register for the pic offset table.  */
 505   rtx got_rtx;
 506
 507   /* The function calls tls_get_addr.  */
 508   int calls_tls_get_addr;
 509 } machine_function;
 510
 511 #ifndef HAVE_AS_TLS
 512 #define HAVE_AS_TLS 0
 513 #endif
 514
 515 #ifndef ENDIAN_SPEC
 516 #if TARGET_BIG_ENDIAN_DEFAULT
 517 #define ENDIAN_SPEC \
 518   "%{!mlittle-endian:-EB} \
 519    %{mlittle-endian:%{mbig-endian: \
 520      %e-mbig-endian and -mlittle-endian may not be used together}-EL}"
 521 #else
 522 #define ENDIAN_SPEC \
 523   "%{!mbig-endian:-EL} \
 524    %{mbig-endian:%{mlittle-endian: \
 525     %e-mbig-endian and -mlittle-endian may not be used together}-EB}"
 526 #endif
 527 #endif
 528
 529 #define EXTRA_SPECS             \
 530   { "endian_spec", ENDIAN_SPEC }