gcc/optabs.h

   1 /* Definitions for code generation pass of GNU compiler.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   3    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
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public 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 #ifndef GCC_OPTABS_H
  22 #define GCC_OPTABS_H
  23
  24 #include "insn-codes.h"
  25
  26 /* Optabs are tables saying how to generate insn bodies
  27    for various machine modes and numbers of operands.
  28    Each optab applies to one operation.
  29
  30    For example, add_optab applies to addition.
  31
  32    The `lib_call' slot is the name of the library function that
  33    can be used to perform the operation.
  34
  35    A few optabs, such as move_optab, are used by special code.  */
  36
  37 struct optab_handlers
  38 {
  39   /* I - CODE_FOR_nothing, where I is either the insn code of the
  40      associated insn generator or CODE_FOR_nothing if there is no such
  41      insn on the target machine.  */
  42   int insn_code;
  43 };
  44
  45 struct widening_optab_handlers
  46 {
  47   struct optab_handlers handlers[NUM_MACHINE_MODES][NUM_MACHINE_MODES];
  48 };
  49
  50 struct optab_d
  51 {
  52   enum rtx_code code;
  53   char libcall_suffix;
  54   const char *libcall_basename;
  55   void (*libcall_gen)(struct optab_d *, const char *name, char suffix,
  56                       enum machine_mode);
  57   struct optab_handlers handlers[NUM_MACHINE_MODES];
  58   struct widening_optab_handlers *widening;
  59 };
  60 typedef struct optab_d * optab;
  61
  62 /* A convert_optab is for some sort of conversion operation between
  63    modes.  The first array index is the destination mode, the second
  64    is the source mode.  */
  65 struct convert_optab_d
  66 {
  67   enum rtx_code code;
  68   const char *libcall_basename;
  69   void (*libcall_gen)(struct convert_optab_d *, const char *name,
  70                       enum machine_mode,
  71                       enum machine_mode);
  72   struct optab_handlers handlers[NUM_MACHINE_MODES][NUM_MACHINE_MODES];
  73 };
  74 typedef struct convert_optab_d *convert_optab;
  75
  76 /* Given an enum insn_code, access the function to construct
  77    the body of that kind of insn.  */
  78 #define GEN_FCN(CODE) (insn_data[CODE].genfun)
  79
  80 /* Enumeration of valid indexes into optab_table.  */
  81 enum optab_index
  82 {
  83   /* Fixed-point operators with signed/unsigned saturation */
  84   OTI_ssadd,
  85   OTI_usadd,
  86   OTI_sssub,
  87   OTI_ussub,
  88   OTI_ssmul,
  89   OTI_usmul,
  90   OTI_ssdiv,
  91   OTI_usdiv,
  92   OTI_ssneg,
  93   OTI_usneg,
  94   OTI_ssashl,
  95   OTI_usashl,
  96
  97   OTI_add,
  98   OTI_addv,
  99   OTI_sub,
 100   OTI_subv,
 101
 102   /* Signed and fp multiply */
 103   OTI_smul,
 104   OTI_smulv,
 105   /* Signed multiply, return high word */
 106   OTI_smul_highpart,
 107   OTI_umul_highpart,
 108   /* Signed multiply with result one machine mode wider than args */
 109   OTI_smul_widen,
 110   OTI_umul_widen,
 111   /* Widening multiply of one unsigned and one signed operand.  */
 112   OTI_usmul_widen,
 113   /* Signed multiply and add with the result and addend one machine mode
 114      wider than the multiplicand and multiplier.  */
 115   OTI_smadd_widen,
 116   /* Unsigned multiply and add with the result and addend one machine mode
 117      wider than the multiplicand and multiplier.  */
 118   OTI_umadd_widen,
 119   /* Signed multiply and add with the result and addend one machine mode
 120      wider than the multiplicand and multiplier.
 121      All involved operations are saturating.  */
 122   OTI_ssmadd_widen,
 123   /* Unsigned multiply and add with the result and addend one machine mode
 124      wider than the multiplicand and multiplier.
 125      All involved operations are saturating.  */
 126   OTI_usmadd_widen,
 127   /* Signed multiply and subtract the result and minuend one machine mode
 128      wider than the multiplicand and multiplier.  */
 129   OTI_smsub_widen,
 130   /* Unsigned multiply and subtract the result and minuend one machine mode
 131      wider than the multiplicand and multiplier.  */
 132   OTI_umsub_widen,
 133   /* Signed multiply and subtract the result and minuend one machine mode
 134      wider than the multiplicand and multiplier.
 135      All involved operations are saturating.  */
 136   OTI_ssmsub_widen,
 137   /* Unsigned multiply and subtract the result and minuend one machine mode
 138      wider than the multiplicand and multiplier.
 139      All involved operations are saturating.  */
 140   OTI_usmsub_widen,
 141
 142   /* Signed divide */
 143   OTI_sdiv,
 144   OTI_sdivv,
 145   /* Signed divide-and-remainder in one */
 146   OTI_sdivmod,
 147   OTI_udiv,
 148   OTI_udivmod,
 149   /* Signed remainder */
 150   OTI_smod,
 151   OTI_umod,
 152   /* Floating point remainder functions */
 153   OTI_fmod,
 154   OTI_remainder,
 155   /* Convert float to integer in float fmt */
 156   OTI_ftrunc,
 157
 158   /* Logical and */
 159   OTI_and,
 160   /* Logical or */
 161   OTI_ior,
 162   /* Logical xor */
 163   OTI_xor,
 164
 165   /* Arithmetic shift left */
 166   OTI_ashl,
 167   /* Logical shift right */
 168   OTI_lshr,
 169   /* Arithmetic shift right */
 170   OTI_ashr,
 171   /* Rotate left */
 172   OTI_rotl,
 173   /* Rotate right */
 174   OTI_rotr,
 175
 176   /* Arithmetic shift left of vector by vector */
 177   OTI_vashl,
 178   /* Logical shift right of vector by vector */
 179   OTI_vlshr,
 180   /* Arithmetic shift right of vector by vector */
 181   OTI_vashr,
 182   /* Rotate left of vector by vector */
 183   OTI_vrotl,
 184   /* Rotate right of vector by vector */
 185   OTI_vrotr,
 186
 187   /* Signed and floating-point minimum value */
 188   OTI_smin,
 189   /* Signed and floating-point maximum value */
 190   OTI_smax,
 191   /* Unsigned minimum value */
 192   OTI_umin,
 193   /* Unsigned maximum value */
 194   OTI_umax,
 195   /* Power */
 196   OTI_pow,
 197   /* Arc tangent of y/x */
 198   OTI_atan2,
 199   /* Floating multiply/add */
 200   OTI_fma,
 201   OTI_fms,
 202   OTI_fnma,
 203   OTI_fnms,
 204
 205   /* Move instruction.  */
 206   OTI_mov,
 207   /* Move, preserving high part of register.  */
 208   OTI_movstrict,
 209   /* Move, with a misaligned memory.  */
 210   OTI_movmisalign,
 211   /* Nontemporal store.  */
 212   OTI_storent,
 213
 214   /* Unary operations */
 215   /* Negation */
 216   OTI_neg,
 217   OTI_negv,
 218   /* Abs value */
 219   OTI_abs,
 220   OTI_absv,
 221   /* Byteswap */
 222   OTI_bswap,
 223   /* Bitwise not */
 224   OTI_one_cmpl,
 225   /* Bit scanning and counting */
 226   OTI_ffs,
 227   OTI_clz,
 228   OTI_ctz,
 229   OTI_clrsb,
 230   OTI_popcount,
 231   OTI_parity,
 232   /* Square root */
 233   OTI_sqrt,
 234   /* Sine-Cosine */
 235   OTI_sincos,
 236   /* Sine */
 237   OTI_sin,
 238   /* Inverse sine */
 239   OTI_asin,
 240   /* Cosine */
 241   OTI_cos,
 242   /* Inverse cosine */
 243   OTI_acos,
 244   /* Exponential */
 245   OTI_exp,
 246   /* Base-10 Exponential */
 247   OTI_exp10,
 248   /* Base-2 Exponential */
 249   OTI_exp2,
 250   /* Exponential - 1*/
 251   OTI_expm1,
 252   /* Load exponent of a floating point number */
 253   OTI_ldexp,
 254   /* Multiply floating-point number by integral power of radix */
 255   OTI_scalb,
 256   /* Mantissa of a floating-point number */
 257   OTI_significand,
 258   /* Radix-independent exponent */
 259   OTI_logb,
 260   OTI_ilogb,
 261   /* Natural Logarithm */
 262   OTI_log,
 263   /* Base-10 Logarithm */
 264   OTI_log10,
 265   /* Base-2 Logarithm */
 266   OTI_log2,
 267   /* logarithm of 1 plus argument */
 268   OTI_log1p,
 269   /* Rounding functions */
 270   OTI_floor,
 271   OTI_ceil,
 272   OTI_btrunc,
 273   OTI_round,
 274   OTI_nearbyint,
 275   OTI_rint,
 276   /* Tangent */
 277   OTI_tan,
 278   /* Inverse tangent */
 279   OTI_atan,
 280   /* Copy sign */
 281   OTI_copysign,
 282   /* Signbit */
 283   OTI_signbit,
 284   /* Test for infinite value */
 285   OTI_isinf,
 286
 287   /* Compare insn; two operands.  Used only for libcalls.  */
 288   OTI_cmp,
 289   OTI_ucmp,
 290
 291   /* Floating point comparison optabs - used primarily for libfuncs */
 292   OTI_eq,
 293   OTI_ne,
 294   OTI_gt,
 295   OTI_ge,
 296   OTI_lt,
 297   OTI_le,
 298   OTI_unord,
 299
 300   /* String length */
 301   OTI_strlen,
 302
 303   /* Combined compare & jump/move/store flags/trap operations.  */
 304   OTI_cbranch,
 305   OTI_cmov,
 306   OTI_cstore,
 307   OTI_ctrap,
 308
 309   /* Push instruction.  */
 310   OTI_push,
 311
 312   /* Conditional add instruction.  */
 313   OTI_addcc,
 314
 315   /* Reduction operations on a vector operand.  */
 316   OTI_reduc_smax,
 317   OTI_reduc_umax,
 318   OTI_reduc_smin,
 319   OTI_reduc_umin,
 320   OTI_reduc_splus,
 321   OTI_reduc_uplus,
 322
 323   /* Summation, with result machine mode one or more wider than args.  */
 324   OTI_ssum_widen,
 325   OTI_usum_widen,
 326
 327   /* Dot product, with result machine mode one or more wider than args.  */
 328   OTI_sdot_prod,
 329   OTI_udot_prod,
 330
 331   /* Set specified field of vector operand.  */
 332   OTI_vec_set,
 333   /* Extract specified field of vector operand.  */
 334   OTI_vec_extract,
 335   /* Initialize vector operand.  */
 336   OTI_vec_init,
 337   /* Whole vector shift. The shift amount is in bits.  */
 338   OTI_vec_shl,
 339   OTI_vec_shr,
 340   /* Extract specified elements from vectors, for vector load.  */
 341   OTI_vec_realign_load,
 342   /* Widening multiplication.
 343      The high/low part of the resulting vector of products is returned.  */
 344   OTI_vec_widen_umult_hi,
 345   OTI_vec_widen_umult_lo,
 346   OTI_vec_widen_smult_hi,
 347   OTI_vec_widen_smult_lo,
 348   /* Widening shift left.
 349      The high/low part of the resulting vector is returned.  */
 350   OTI_vec_widen_ushiftl_hi,
 351   OTI_vec_widen_ushiftl_lo,
 352   OTI_vec_widen_sshiftl_hi,
 353   OTI_vec_widen_sshiftl_lo,
 354   /* Extract and widen the high/low part of a vector of signed or
 355      floating point elements.  */
 356   OTI_vec_unpacks_hi,
 357   OTI_vec_unpacks_lo,
 358   /* Extract and widen the high/low part of a vector of unsigned
 359      elements.  */
 360   OTI_vec_unpacku_hi,
 361   OTI_vec_unpacku_lo,
 362
 363   /* Extract, convert to floating point and widen the high/low part of
 364      a vector of signed or unsigned integer elements.  */
 365   OTI_vec_unpacks_float_hi,
 366   OTI_vec_unpacks_float_lo,
 367   OTI_vec_unpacku_float_hi,
 368   OTI_vec_unpacku_float_lo,
 369
 370   /* Narrow (demote) and merge the elements of two vectors.  */
 371   OTI_vec_pack_trunc,
 372   OTI_vec_pack_usat,
 373   OTI_vec_pack_ssat,
 374
 375   /* Convert to signed/unsigned integer, narrow and merge elements
 376      of two vectors of floating point elements.  */
 377   OTI_vec_pack_sfix_trunc,
 378   OTI_vec_pack_ufix_trunc,
 379
 380   /* Perform a raise to the power of integer.  */
 381   OTI_powi,
 382
 383   /* Atomic compare and swap.  */
 384   OTI_sync_compare_and_swap,
 385
 386   /* Atomic exchange with acquire semantics.  */
 387   OTI_sync_lock_test_and_set,
 388
 389   /* This second set is atomic operations in which we return the value
 390      that existed in memory before the operation.  */
 391   OTI_sync_old_add,
 392   OTI_sync_old_sub,
 393   OTI_sync_old_ior,
 394   OTI_sync_old_and,
 395   OTI_sync_old_xor,
 396   OTI_sync_old_nand,
 397
 398   /* This third set is atomic operations in which we return the value
 399      that resulted after performing the operation.  */
 400   OTI_sync_new_add,
 401   OTI_sync_new_sub,
 402   OTI_sync_new_ior,
 403   OTI_sync_new_and,
 404   OTI_sync_new_xor,
 405   OTI_sync_new_nand,
 406
 407   OTI_MAX
 408 };
 409
 410 #define ssadd_optab (&optab_table[OTI_ssadd])
 411 #define usadd_optab (&optab_table[OTI_usadd])
 412 #define sssub_optab (&optab_table[OTI_sssub])
 413 #define ussub_optab (&optab_table[OTI_ussub])
 414 #define ssmul_optab (&optab_table[OTI_ssmul])
 415 #define usmul_optab (&optab_table[OTI_usmul])
 416 #define ssdiv_optab (&optab_table[OTI_ssdiv])
 417 #define usdiv_optab (&optab_table[OTI_usdiv])
 418 #define ssneg_optab (&optab_table[OTI_ssneg])
 419 #define usneg_optab (&optab_table[OTI_usneg])
 420 #define ssashl_optab (&optab_table[OTI_ssashl])
 421 #define usashl_optab (&optab_table[OTI_usashl])
 422
 423 #define add_optab (&optab_table[OTI_add])
 424 #define sub_optab (&optab_table[OTI_sub])
 425 #define smul_optab (&optab_table[OTI_smul])
 426 #define addv_optab (&optab_table[OTI_addv])
 427 #define subv_optab (&optab_table[OTI_subv])
 428 #define smul_highpart_optab (&optab_table[OTI_smul_highpart])
 429 #define umul_highpart_optab (&optab_table[OTI_umul_highpart])
 430 #define smul_widen_optab (&optab_table[OTI_smul_widen])
 431 #define umul_widen_optab (&optab_table[OTI_umul_widen])
 432 #define usmul_widen_optab (&optab_table[OTI_usmul_widen])
 433 #define smadd_widen_optab (&optab_table[OTI_smadd_widen])
 434 #define umadd_widen_optab (&optab_table[OTI_umadd_widen])
 435 #define ssmadd_widen_optab (&optab_table[OTI_ssmadd_widen])
 436 #define usmadd_widen_optab (&optab_table[OTI_usmadd_widen])
 437 #define smsub_widen_optab (&optab_table[OTI_smsub_widen])
 438 #define umsub_widen_optab (&optab_table[OTI_umsub_widen])
 439 #define ssmsub_widen_optab (&optab_table[OTI_ssmsub_widen])
 440 #define usmsub_widen_optab (&optab_table[OTI_usmsub_widen])
 441 #define sdiv_optab (&optab_table[OTI_sdiv])
 442 #define smulv_optab (&optab_table[OTI_smulv])
 443 #define sdivv_optab (&optab_table[OTI_sdivv])
 444 #define sdivmod_optab (&optab_table[OTI_sdivmod])
 445 #define udiv_optab (&optab_table[OTI_udiv])
 446 #define udivmod_optab (&optab_table[OTI_udivmod])
 447 #define smod_optab (&optab_table[OTI_smod])
 448 #define umod_optab (&optab_table[OTI_umod])
 449 #define fmod_optab (&optab_table[OTI_fmod])
 450 #define remainder_optab (&optab_table[OTI_remainder])
 451 #define ftrunc_optab (&optab_table[OTI_ftrunc])
 452 #define and_optab (&optab_table[OTI_and])
 453 #define ior_optab (&optab_table[OTI_ior])
 454 #define xor_optab (&optab_table[OTI_xor])
 455 #define ashl_optab (&optab_table[OTI_ashl])
 456 #define lshr_optab (&optab_table[OTI_lshr])
 457 #define ashr_optab (&optab_table[OTI_ashr])
 458 #define rotl_optab (&optab_table[OTI_rotl])
 459 #define rotr_optab (&optab_table[OTI_rotr])
 460 #define vashl_optab (&optab_table[OTI_vashl])
 461 #define vlshr_optab (&optab_table[OTI_vlshr])
 462 #define vashr_optab (&optab_table[OTI_vashr])
 463 #define vrotl_optab (&optab_table[OTI_vrotl])
 464 #define vrotr_optab (&optab_table[OTI_vrotr])
 465 #define smin_optab (&optab_table[OTI_smin])
 466 #define smax_optab (&optab_table[OTI_smax])
 467 #define umin_optab (&optab_table[OTI_umin])
 468 #define umax_optab (&optab_table[OTI_umax])
 469 #define pow_optab (&optab_table[OTI_pow])
 470 #define atan2_optab (&optab_table[OTI_atan2])
 471 #define fma_optab (&optab_table[OTI_fma])
 472 #define fms_optab (&optab_table[OTI_fms])
 473 #define fnma_optab (&optab_table[OTI_fnma])
 474 #define fnms_optab (&optab_table[OTI_fnms])
 475
 476 #define mov_optab (&optab_table[OTI_mov])
 477 #define movstrict_optab (&optab_table[OTI_movstrict])
 478 #define movmisalign_optab (&optab_table[OTI_movmisalign])
 479 #define storent_optab (&optab_table[OTI_storent])
 480
 481 #define neg_optab (&optab_table[OTI_neg])
 482 #define negv_optab (&optab_table[OTI_negv])
 483 #define abs_optab (&optab_table[OTI_abs])
 484 #define absv_optab (&optab_table[OTI_absv])
 485 #define one_cmpl_optab (&optab_table[OTI_one_cmpl])
 486 #define bswap_optab (&optab_table[OTI_bswap])
 487 #define ffs_optab (&optab_table[OTI_ffs])
 488 #define clz_optab (&optab_table[OTI_clz])
 489 #define ctz_optab (&optab_table[OTI_ctz])
 490 #define clrsb_optab (&optab_table[OTI_clrsb])
 491 #define popcount_optab (&optab_table[OTI_popcount])
 492 #define parity_optab (&optab_table[OTI_parity])
 493 #define sqrt_optab (&optab_table[OTI_sqrt])
 494 #define sincos_optab (&optab_table[OTI_sincos])
 495 #define sin_optab (&optab_table[OTI_sin])
 496 #define asin_optab (&optab_table[OTI_asin])
 497 #define cos_optab (&optab_table[OTI_cos])
 498 #define acos_optab (&optab_table[OTI_acos])
 499 #define exp_optab (&optab_table[OTI_exp])
 500 #define exp10_optab (&optab_table[OTI_exp10])
 501 #define exp2_optab (&optab_table[OTI_exp2])
 502 #define expm1_optab (&optab_table[OTI_expm1])
 503 #define ldexp_optab (&optab_table[OTI_ldexp])
 504 #define scalb_optab (&optab_table[OTI_scalb])
 505 #define significand_optab (&optab_table[OTI_significand])
 506 #define logb_optab (&optab_table[OTI_logb])
 507 #define ilogb_optab (&optab_table[OTI_ilogb])
 508 #define log_optab (&optab_table[OTI_log])
 509 #define log10_optab (&optab_table[OTI_log10])
 510 #define log2_optab (&optab_table[OTI_log2])
 511 #define log1p_optab (&optab_table[OTI_log1p])
 512 #define floor_optab (&optab_table[OTI_floor])
 513 #define ceil_optab (&optab_table[OTI_ceil])
 514 #define btrunc_optab (&optab_table[OTI_btrunc])
 515 #define round_optab (&optab_table[OTI_round])
 516 #define nearbyint_optab (&optab_table[OTI_nearbyint])
 517 #define rint_optab (&optab_table[OTI_rint])
 518 #define tan_optab (&optab_table[OTI_tan])
 519 #define atan_optab (&optab_table[OTI_atan])
 520 #define copysign_optab (&optab_table[OTI_copysign])
 521 #define signbit_optab (&optab_table[OTI_signbit])
 522 #define isinf_optab (&optab_table[OTI_isinf])
 523
 524 #define cmp_optab (&optab_table[OTI_cmp])
 525 #define ucmp_optab (&optab_table[OTI_ucmp])
 526
 527 #define eq_optab (&optab_table[OTI_eq])
 528 #define ne_optab (&optab_table[OTI_ne])
 529 #define gt_optab (&optab_table[OTI_gt])
 530 #define ge_optab (&optab_table[OTI_ge])
 531 #define lt_optab (&optab_table[OTI_lt])
 532 #define le_optab (&optab_table[OTI_le])
 533 #define unord_optab (&optab_table[OTI_unord])
 534
 535 #define strlen_optab (&optab_table[OTI_strlen])
 536
 537 #define cbranch_optab (&optab_table[OTI_cbranch])
 538 #define cmov_optab (&optab_table[OTI_cmov])
 539 #define cstore_optab (&optab_table[OTI_cstore])
 540 #define ctrap_optab (&optab_table[OTI_ctrap])
 541
 542 #define push_optab (&optab_table[OTI_push])
 543 #define addcc_optab (&optab_table[OTI_addcc])
 544
 545 #define reduc_smax_optab (&optab_table[OTI_reduc_smax])
 546 #define reduc_umax_optab (&optab_table[OTI_reduc_umax])
 547 #define reduc_smin_optab (&optab_table[OTI_reduc_smin])
 548 #define reduc_umin_optab (&optab_table[OTI_reduc_umin])
 549 #define reduc_splus_optab (&optab_table[OTI_reduc_splus])
 550 #define reduc_uplus_optab (&optab_table[OTI_reduc_uplus])
 551
 552 #define ssum_widen_optab (&optab_table[OTI_ssum_widen])
 553 #define usum_widen_optab (&optab_table[OTI_usum_widen])
 554 #define sdot_prod_optab (&optab_table[OTI_sdot_prod])
 555 #define udot_prod_optab (&optab_table[OTI_udot_prod])
 556
 557 #define vec_set_optab (&optab_table[OTI_vec_set])
 558 #define vec_extract_optab (&optab_table[OTI_vec_extract])
 559 #define vec_init_optab (&optab_table[OTI_vec_init])
 560 #define vec_shl_optab (&optab_table[OTI_vec_shl])
 561 #define vec_shr_optab (&optab_table[OTI_vec_shr])
 562 #define vec_realign_load_optab (&optab_table[OTI_vec_realign_load])
 563 #define vec_widen_umult_hi_optab (&optab_table[OTI_vec_widen_umult_hi])
 564 #define vec_widen_umult_lo_optab (&optab_table[OTI_vec_widen_umult_lo])
 565 #define vec_widen_smult_hi_optab (&optab_table[OTI_vec_widen_smult_hi])
 566 #define vec_widen_smult_lo_optab (&optab_table[OTI_vec_widen_smult_lo])
 567 #define vec_widen_ushiftl_hi_optab (&optab_table[OTI_vec_widen_ushiftl_hi])
 568 #define vec_widen_ushiftl_lo_optab (&optab_table[OTI_vec_widen_ushiftl_lo])
 569 #define vec_widen_sshiftl_hi_optab (&optab_table[OTI_vec_widen_sshiftl_hi])
 570 #define vec_widen_sshiftl_lo_optab (&optab_table[OTI_vec_widen_sshiftl_lo])
 571 #define vec_unpacks_hi_optab (&optab_table[OTI_vec_unpacks_hi])
 572 #define vec_unpacks_lo_optab (&optab_table[OTI_vec_unpacks_lo])
 573 #define vec_unpacku_hi_optab (&optab_table[OTI_vec_unpacku_hi])
 574 #define vec_unpacku_lo_optab (&optab_table[OTI_vec_unpacku_lo])
 575 #define vec_unpacks_float_hi_optab (&optab_table[OTI_vec_unpacks_float_hi])
 576 #define vec_unpacks_float_lo_optab (&optab_table[OTI_vec_unpacks_float_lo])
 577 #define vec_unpacku_float_hi_optab (&optab_table[OTI_vec_unpacku_float_hi])
 578 #define vec_unpacku_float_lo_optab (&optab_table[OTI_vec_unpacku_float_lo])
 579 #define vec_pack_trunc_optab (&optab_table[OTI_vec_pack_trunc])
 580 #define vec_pack_ssat_optab (&optab_table[OTI_vec_pack_ssat])
 581 #define vec_pack_usat_optab (&optab_table[OTI_vec_pack_usat])
 582 #define vec_pack_sfix_trunc_optab (&optab_table[OTI_vec_pack_sfix_trunc])
 583 #define vec_pack_ufix_trunc_optab (&optab_table[OTI_vec_pack_ufix_trunc])
 584
 585 #define powi_optab (&optab_table[OTI_powi])
 586
 587 #define sync_compare_and_swap_optab \
 588   (&optab_table[(int) OTI_sync_compare_and_swap])
 589 #define sync_lock_test_and_set_optab \
 590   (&optab_table[(int) OTI_sync_lock_test_and_set])
 591 #define sync_old_add_optab (&optab_table[(int) OTI_sync_old_add])
 592 #define sync_old_sub_optab (&optab_table[(int) OTI_sync_old_sub])
 593 #define sync_old_ior_optab (&optab_table[(int) OTI_sync_old_ior])
 594 #define sync_old_and_optab (&optab_table[(int) OTI_sync_old_and])
 595 #define sync_old_xor_optab (&optab_table[(int) OTI_sync_old_xor])
 596 #define sync_old_nand_optab (&optab_table[(int) OTI_sync_old_nand])
 597 #define sync_new_add_optab (&optab_table[(int) OTI_sync_new_add])
 598 #define sync_new_sub_optab (&optab_table[(int) OTI_sync_new_sub])
 599 #define sync_new_ior_optab (&optab_table[(int) OTI_sync_new_ior])
 600 #define sync_new_and_optab (&optab_table[(int) OTI_sync_new_and])
 601 #define sync_new_xor_optab (&optab_table[(int) OTI_sync_new_xor])
 602 #define sync_new_nand_optab (&optab_table[(int) OTI_sync_new_nand])
 603
 604 /* Conversion optabs have their own table and indexes.  */
 605 enum convert_optab_index
 606 {
 607   COI_sext,
 608   COI_zext,
 609   COI_trunc,
 610
 611   COI_sfix,
 612   COI_ufix,
 613
 614   COI_sfixtrunc,
 615   COI_ufixtrunc,
 616
 617   COI_sfloat,
 618   COI_ufloat,
 619
 620   COI_lrint,
 621   COI_lround,
 622   COI_lfloor,
 623   COI_lceil,
 624
 625   COI_fract,
 626   COI_fractuns,
 627   COI_satfract,
 628   COI_satfractuns,
 629
 630   COI_vec_load_lanes,
 631   COI_vec_store_lanes,
 632
 633   /* Vector conditional operations.  */
 634   COI_vcond,
 635   COI_vcondu,
 636
 637   COI_MAX
 638 };
 639
 640 #define sext_optab (&convert_optab_table[COI_sext])
 641 #define zext_optab (&convert_optab_table[COI_zext])
 642 #define trunc_optab (&convert_optab_table[COI_trunc])
 643 #define sfix_optab (&convert_optab_table[COI_sfix])
 644 #define ufix_optab (&convert_optab_table[COI_ufix])
 645 #define sfixtrunc_optab (&convert_optab_table[COI_sfixtrunc])
 646 #define ufixtrunc_optab (&convert_optab_table[COI_ufixtrunc])
 647 #define sfloat_optab (&convert_optab_table[COI_sfloat])
 648 #define ufloat_optab (&convert_optab_table[COI_ufloat])
 649 #define lrint_optab (&convert_optab_table[COI_lrint])
 650 #define lround_optab (&convert_optab_table[COI_lround])
 651 #define lfloor_optab (&convert_optab_table[COI_lfloor])
 652 #define lceil_optab (&convert_optab_table[COI_lceil])
 653 #define fract_optab (&convert_optab_table[COI_fract])
 654 #define fractuns_optab (&convert_optab_table[COI_fractuns])
 655 #define satfract_optab (&convert_optab_table[COI_satfract])
 656 #define satfractuns_optab (&convert_optab_table[COI_satfractuns])
 657 #define vec_load_lanes_optab (&convert_optab_table[COI_vec_load_lanes])
 658 #define vec_store_lanes_optab (&convert_optab_table[COI_vec_store_lanes])
 659 #define vcond_optab (&convert_optab_table[(int) COI_vcond])
 660 #define vcondu_optab (&convert_optab_table[(int) COI_vcondu])
 661
 662 /* Contains the optab used for each rtx code.  */
 663 extern optab code_to_optab[NUM_RTX_CODE + 1];
 664
 665 \f
 666 typedef rtx (*rtxfun) (rtx);
 667
 668 /* Enumerates operations that have a named .md pattern associated
 669    with them, but which are not implemented as library functions.  */
 670 enum direct_optab_index
 671 {
 672 #ifdef HAVE_conditional_move
 673   /* Conditional move operations.  */
 674   DOI_movcc,
 675 #endif
 676
 677   /* Operations that use a scratch register to perform input and output
 678      reloads of special objects.  */
 679   DOI_reload_in,
 680   DOI_reload_out,
 681
 682   /* Block move operation.  */
 683   DOI_movmem,
 684
 685   /* Block set operation.  */
 686   DOI_setmem,
 687
 688   /* Various types of block compare operation.  */
 689   DOI_cmpstr,
 690   DOI_cmpstrn,
 691   DOI_cmpmem,
 692
 693   /* Atomic clear with release semantics.  */
 694   DOI_sync_lock_release,
 695
 696   /* Atomic operation with no resulting value.  */
 697   DOI_sync_add,
 698   DOI_sync_sub,
 699   DOI_sync_ior,
 700   DOI_sync_and,
 701   DOI_sync_xor,
 702   DOI_sync_nand,
 703
 704   /* Atomic operations with memory model parameters. */
 705   DOI_atomic_exchange,
 706   DOI_atomic_compare_and_swap,
 707   DOI_atomic_load,
 708   DOI_atomic_store,
 709   DOI_atomic_add_fetch,
 710   DOI_atomic_sub_fetch,
 711   DOI_atomic_and_fetch,
 712   DOI_atomic_nand_fetch,
 713   DOI_atomic_xor_fetch,
 714   DOI_atomic_or_fetch,
 715   DOI_atomic_fetch_add,
 716   DOI_atomic_fetch_sub,
 717   DOI_atomic_fetch_and,
 718   DOI_atomic_fetch_nand,
 719   DOI_atomic_fetch_xor,
 720   DOI_atomic_fetch_or,
 721   DOI_atomic_add,
 722   DOI_atomic_sub,
 723   DOI_atomic_and,
 724   DOI_atomic_nand,
 725   DOI_atomic_xor,
 726   DOI_atomic_or,
 727   DOI_atomic_always_lock_free,
 728   DOI_atomic_is_lock_free,
 729   DOI_atomic_thread_fence,
 730   DOI_atomic_signal_fence,
 731
 732   /* Vector permutation.  */
 733   DOI_vec_perm,
 734   DOI_vec_perm_const,
 735
 736   DOI_MAX
 737 };
 738
 739 /* A structure that says which insn should be used to perform an operation
 740    in a particular mode.  */
 741 struct direct_optab_d
 742 {
 743   struct optab_handlers handlers[NUM_MACHINE_MODES];
 744 };
 745 typedef struct direct_optab_d *direct_optab;
 746
 747 #ifdef HAVE_conditional_move
 748 #define movcc_optab (&direct_optab_table[(int) DOI_movcc])
 749 #endif
 750 #define reload_in_optab (&direct_optab_table[(int) DOI_reload_in])
 751 #define reload_out_optab (&direct_optab_table[(int) DOI_reload_out])
 752 #define movmem_optab (&direct_optab_table[(int) DOI_movmem])
 753 #define setmem_optab (&direct_optab_table[(int) DOI_setmem])
 754 #define cmpstr_optab (&direct_optab_table[(int) DOI_cmpstr])
 755 #define cmpstrn_optab (&direct_optab_table[(int) DOI_cmpstrn])
 756 #define cmpmem_optab (&direct_optab_table[(int) DOI_cmpmem])
 757 #define sync_lock_release_optab \
 758   (&direct_optab_table[(int) DOI_sync_lock_release])
 759 #define sync_add_optab (&direct_optab_table[(int) DOI_sync_add])
 760 #define sync_sub_optab (&direct_optab_table[(int) DOI_sync_sub])
 761 #define sync_ior_optab (&direct_optab_table[(int) DOI_sync_ior])
 762 #define sync_and_optab (&direct_optab_table[(int) DOI_sync_and])
 763 #define sync_xor_optab (&direct_optab_table[(int) DOI_sync_xor])
 764 #define sync_nand_optab (&direct_optab_table[(int) DOI_sync_nand])
 765
 766 #define atomic_exchange_optab \
 767   (&direct_optab_table[(int) DOI_atomic_exchange])
 768 #define atomic_compare_and_swap_optab \
 769   (&direct_optab_table[(int) DOI_atomic_compare_and_swap])
 770 #define atomic_load_optab \
 771   (&direct_optab_table[(int) DOI_atomic_load])
 772 #define atomic_store_optab \
 773   (&direct_optab_table[(int) DOI_atomic_store])
 774 #define atomic_add_fetch_optab \
 775   (&direct_optab_table[(int) DOI_atomic_add_fetch])
 776 #define atomic_sub_fetch_optab \
 777   (&direct_optab_table[(int) DOI_atomic_sub_fetch])
 778 #define atomic_and_fetch_optab \
 779   (&direct_optab_table[(int) DOI_atomic_and_fetch])
 780 #define atomic_nand_fetch_optab \
 781   (&direct_optab_table[(int) DOI_atomic_nand_fetch])
 782 #define atomic_xor_fetch_optab \
 783   (&direct_optab_table[(int) DOI_atomic_xor_fetch])
 784 #define atomic_or_fetch_optab \
 785   (&direct_optab_table[(int) DOI_atomic_or_fetch])
 786 #define atomic_fetch_add_optab \
 787   (&direct_optab_table[(int) DOI_atomic_fetch_add])
 788 #define atomic_fetch_sub_optab \
 789   (&direct_optab_table[(int) DOI_atomic_fetch_sub])
 790 #define atomic_fetch_and_optab \
 791   (&direct_optab_table[(int) DOI_atomic_fetch_and])
 792 #define atomic_fetch_nand_optab \
 793   (&direct_optab_table[(int) DOI_atomic_fetch_nand])
 794 #define atomic_fetch_xor_optab \
 795   (&direct_optab_table[(int) DOI_atomic_fetch_xor])
 796 #define atomic_fetch_or_optab \
 797   (&direct_optab_table[(int) DOI_atomic_fetch_or])
 798 #define atomic_add_optab \
 799   (&direct_optab_table[(int) DOI_atomic_add])
 800 #define atomic_sub_optab \
 801   (&direct_optab_table[(int) DOI_atomic_sub])
 802 #define atomic_and_optab \
 803   (&direct_optab_table[(int) DOI_atomic_and])
 804 #define atomic_nand_optab \
 805   (&direct_optab_table[(int) DOI_atomic_nand])
 806 #define atomic_xor_optab \
 807   (&direct_optab_table[(int) DOI_atomic_xor])
 808 #define atomic_or_optab \
 809   (&direct_optab_table[(int) DOI_atomic_or])
 810 #define atomic_always_lock_free_optab \
 811   (&direct_optab_table[(int) DOI_atomic_always_lock_free])
 812 #define atomic_is_lock_free_optab \
 813   (&direct_optab_table[(int) DOI_atomic_is_lock_free])
 814 #define atomic_thread_fence_optab \
 815   (&direct_optab_table[(int) DOI_atomic_thread_fence])
 816 #define atomic_signal_fence_optab \
 817   (&direct_optab_table[(int) DOI_atomic_signal_fence])
 818
 819 #define vec_perm_optab (&direct_optab_table[DOI_vec_perm])
 820 #define vec_perm_const_optab (&direct_optab_table[(int) DOI_vec_perm_const])
 821 \f
 822 /* Target-dependent globals.  */
 823 struct target_optabs {
 824   /* Tables of patterns that may have an associated libcall.  */
 825   struct optab_d x_optab_table[(int) OTI_MAX];
 826
 827   /* Tables of patterns for converting one mode to another.  */
 828   struct convert_optab_d x_convert_optab_table[(int) COI_MAX];
 829
 830   /* Tables of patterns for direct optabs (i.e. those which cannot be
 831      implemented using a libcall).  */
 832   struct direct_optab_d x_direct_optab_table[(int) DOI_MAX];
 833 };
 834
 835 extern struct target_optabs default_target_optabs;
 836 #if SWITCHABLE_TARGET
 837 extern struct target_optabs *this_target_optabs;
 838 #else
 839 #define this_target_optabs (&default_target_optabs)
 840 #endif
 841
 842 #define optab_table \
 843   (this_target_optabs->x_optab_table)
 844 #define convert_optab_table \
 845   (this_target_optabs->x_convert_optab_table)
 846 #define direct_optab_table \
 847   (this_target_optabs->x_direct_optab_table)
 848 \f
 849 /* Define functions given in optabs.c.  */
 850
 851 extern rtx expand_widen_pattern_expr (sepops ops, rtx op0, rtx op1, rtx wide_op,
 852                                       rtx target, int unsignedp);
 853
 854 extern rtx expand_ternary_op (enum machine_mode mode, optab ternary_optab,
 855                               rtx op0, rtx op1, rtx op2, rtx target,
 856                               int unsignedp);
 857
 858 /* Expand a binary operation given optab and rtx operands.  */
 859 extern rtx expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
 860                          enum optab_methods);
 861
 862 extern rtx simplify_expand_binop (enum machine_mode mode, optab binoptab,
 863                                   rtx op0, rtx op1, rtx target, int unsignedp,
 864                                   enum optab_methods methods);
 865
 866 extern bool force_expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
 867                                 enum optab_methods);
 868
 869 /* Expand a binary operation with both signed and unsigned forms.  */
 870 extern rtx sign_expand_binop (enum machine_mode, optab, optab, rtx, rtx,
 871                               rtx, int, enum optab_methods);
 872
 873 /* Generate code to perform an operation on one operand with two results.  */
 874 extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
 875
 876 /* Generate code to perform an operation on two operands with two results.  */
 877 extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
 878
 879 /* Generate code to perform an operation on two operands with two
 880    results, using a library function.  */
 881 extern bool expand_twoval_binop_libfunc (optab, rtx, rtx, rtx, rtx,
 882                                          enum rtx_code);
 883
 884 /* Expand a unary arithmetic operation given optab rtx operand.  */
 885 extern rtx expand_unop (enum machine_mode, optab, rtx, rtx, int);
 886
 887 /* Expand the absolute value operation.  */
 888 extern rtx expand_abs_nojump (enum machine_mode, rtx, rtx, int);
 889 extern rtx expand_abs (enum machine_mode, rtx, rtx, int, int);
 890
 891 /* Expand the one's complement absolute value operation.  */
 892 extern rtx expand_one_cmpl_abs_nojump (enum machine_mode, rtx, rtx);
 893
 894 /* Expand the copysign operation.  */
 895 extern rtx expand_copysign (rtx, rtx, rtx);
 896
 897 /* Generate an instruction with a given INSN_CODE with an output and
 898    an input.  */
 899 extern void emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
 900 extern bool maybe_emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
 901
 902 /* Find a widening optab even if it doesn't widen as much as we want.  */
 903 #define find_widening_optab_handler(A,B,C,D) \
 904   find_widening_optab_handler_and_mode (A, B, C, D, NULL)
 905 extern enum insn_code find_widening_optab_handler_and_mode (optab,
 906                                                             enum machine_mode,
 907                                                             enum machine_mode,
 908                                                             int,
 909                                                             enum machine_mode *);
 910
 911 /* An extra flag to control optab_for_tree_code's behavior.  This is needed to
 912    distinguish between machines with a vector shift that takes a scalar for the
 913    shift amount vs. machines that take a vector for the shift amount.  */
 914 enum optab_subtype
 915 {
 916   optab_default,
 917   optab_scalar,
 918   optab_vector
 919 };
 920
 921 /* Return the optab used for computing the given operation on the type given by
 922    the second argument.  The third argument distinguishes between the types of
 923    vector shifts and rotates */
 924 extern optab optab_for_tree_code (enum tree_code, const_tree, enum optab_subtype);
 925
 926 /* The various uses that a comparison can have; used by can_compare_p:
 927    jumps, conditional moves, store flag operations.  */
 928 enum can_compare_purpose
 929 {
 930   ccp_jump,
 931   ccp_cmov,
 932   ccp_store_flag
 933 };
 934
 935 /* Nonzero if a compare of mode MODE can be done straightforwardly
 936    (without splitting it into pieces).  */
 937 extern int can_compare_p (enum rtx_code, enum machine_mode,
 938                           enum can_compare_purpose);
 939
 940 /* Return the INSN_CODE to use for an extend operation.  */
 941 extern enum insn_code can_extend_p (enum machine_mode, enum machine_mode, int);
 942
 943 /* Generate the body of an insn to extend Y (with mode MFROM)
 944    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 945 extern rtx gen_extend_insn (rtx, rtx, enum machine_mode,
 946                             enum machine_mode, int);
 947
 948 /* Call this to reset the function entry for one optab.  */
 949 extern void set_optab_libfunc (optab, enum machine_mode, const char *);
 950 extern void set_conv_libfunc (convert_optab, enum machine_mode,
 951                               enum machine_mode, const char *);
 952
 953 /* Call this to install all of the __sync libcalls up to size MAX.  */
 954 extern void init_sync_libfuncs (int max);
 955
 956 /* Generate code for a FIXED_CONVERT_EXPR.  */
 957 extern void expand_fixed_convert (rtx, rtx, int, int);
 958
 959 /* Generate code for a FLOAT_EXPR.  */
 960 extern void expand_float (rtx, rtx, int);
 961
 962 /* Return the insn_code for a FLOAT_EXPR.  */
 963 enum insn_code can_float_p (enum machine_mode, enum machine_mode, int);
 964
 965 /* Return true if there is an inline compare and swap pattern.  */
 966 extern bool can_compare_and_swap_p (enum machine_mode, bool);
 967
 968 /* Return true if there is an inline atomic exchange pattern.  */
 969 extern bool can_atomic_exchange_p (enum machine_mode, bool);
 970
 971 /* Generate code for a compare and swap.  */
 972 extern bool expand_atomic_compare_and_swap (rtx *, rtx *, rtx, rtx, rtx, bool,
 973                                             enum memmodel, enum memmodel);
 974
 975 /* Generate memory barriers.  */
 976 extern void expand_mem_thread_fence (enum memmodel);
 977 extern void expand_mem_signal_fence (enum memmodel);
 978
 979 /* Check whether an operation represented by the code CODE is a
 980    convert operation that is supported by the target platform in
 981    vector form */
 982 bool supportable_convert_operation (enum tree_code, tree, tree, tree *,
 983                                     enum tree_code *);
 984
 985 /* Generate code for a FIX_EXPR.  */
 986 extern void expand_fix (rtx, rtx, int);
 987
 988 /* Generate code for float to integral conversion.  */
 989 extern bool expand_sfix_optab (rtx, rtx, convert_optab);
 990
 991 /* Generate code for a widening multiply.  */
 992 extern rtx expand_widening_mult (enum machine_mode, rtx, rtx, rtx, int, optab);
 993
 994 /* Return tree if target supports vector operations for COND_EXPR.  */
 995 bool expand_vec_cond_expr_p (tree, tree);
 996
 997 /* Generate code for VEC_COND_EXPR.  */
 998 extern rtx expand_vec_cond_expr (tree, tree, tree, tree, rtx);
 999 /* Generate code for VEC_LSHIFT_EXPR and VEC_RSHIFT_EXPR.  */
1000 extern rtx expand_vec_shift_expr (sepops, rtx);
1001
1002 /* Return tree if target supports vector operations for VEC_PERM_EXPR.  */
1003 extern bool can_vec_perm_p (enum machine_mode, bool, const unsigned char *);
1004
1005 /* Generate code for VEC_PERM_EXPR.  */
1006 extern rtx expand_vec_perm (enum machine_mode, rtx, rtx, rtx, rtx);
1007
1008 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
1009    if the target does not have such an insn.  */
1010
1011 static inline enum insn_code
1012 optab_handler (optab op, enum machine_mode mode)
1013 {
1014   return (enum insn_code) (op->handlers[(int) mode].insn_code
1015                            + (int) CODE_FOR_nothing);
1016 }
1017
1018 /* Like optab_handler, but for widening_operations that have a TO_MODE and
1019   a FROM_MODE.  */
1020
1021 static inline enum insn_code
1022 widening_optab_handler (optab op, enum machine_mode to_mode,
1023                         enum machine_mode from_mode)
1024 {
1025   if (to_mode == from_mode || from_mode == VOIDmode)
1026     return optab_handler (op, to_mode);
1027
1028   if (op->widening)
1029     return (enum insn_code) (op->widening->handlers[(int) to_mode][(int) from_mode].insn_code
1030                              + (int) CODE_FOR_nothing);
1031
1032   return CODE_FOR_nothing;
1033 }
1034
1035 /* Record that insn CODE should be used to implement mode MODE of OP.  */
1036
1037 static inline void
1038 set_optab_handler (optab op, enum machine_mode mode, enum insn_code code)
1039 {
1040   op->handlers[(int) mode].insn_code = (int) code - (int) CODE_FOR_nothing;
1041 }
1042
1043 /* Like set_optab_handler, but for widening operations that have a TO_MODE
1044    and a FROM_MODE.  */
1045
1046 static inline void
1047 set_widening_optab_handler (optab op, enum machine_mode to_mode,
1048                             enum machine_mode from_mode, enum insn_code code)
1049 {
1050   if (to_mode == from_mode)
1051     set_optab_handler (op, to_mode, code);
1052   else
1053     {
1054       if (op->widening == NULL)
1055         op->widening = (struct widening_optab_handlers *)
1056               xcalloc (1, sizeof (struct widening_optab_handlers));
1057
1058       op->widening->handlers[(int) to_mode][(int) from_mode].insn_code
1059           = (int) code - (int) CODE_FOR_nothing;
1060     }
1061 }
1062
1063 /* Return the insn used to perform conversion OP from mode FROM_MODE
1064    to mode TO_MODE; return CODE_FOR_nothing if the target does not have
1065    such an insn.  */
1066
1067 static inline enum insn_code
1068 convert_optab_handler (convert_optab op, enum machine_mode to_mode,
1069                        enum machine_mode from_mode)
1070 {
1071   return ((enum insn_code)
1072           (op->handlers[(int) to_mode][(int) from_mode].insn_code
1073            + (int) CODE_FOR_nothing));
1074 }
1075
1076 /* Record that insn CODE should be used to perform conversion OP
1077    from mode FROM_MODE to mode TO_MODE.  */
1078
1079 static inline void
1080 set_convert_optab_handler (convert_optab op, enum machine_mode to_mode,
1081                            enum machine_mode from_mode, enum insn_code code)
1082 {
1083   op->handlers[(int) to_mode][(int) from_mode].insn_code
1084     = (int) code - (int) CODE_FOR_nothing;
1085 }
1086
1087 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
1088    if the target does not have such an insn.  */
1089
1090 static inline enum insn_code
1091 direct_optab_handler (direct_optab op, enum machine_mode mode)
1092 {
1093   return (enum insn_code) (op->handlers[(int) mode].insn_code
1094                            + (int) CODE_FOR_nothing);
1095 }
1096
1097 /* Record that insn CODE should be used to implement mode MODE of OP.  */
1098
1099 static inline void
1100 set_direct_optab_handler (direct_optab op, enum machine_mode mode,
1101                           enum insn_code code)
1102 {
1103   op->handlers[(int) mode].insn_code = (int) code - (int) CODE_FOR_nothing;
1104 }
1105
1106 extern rtx optab_libfunc (optab optab, enum machine_mode mode);
1107 extern rtx convert_optab_libfunc (convert_optab optab, enum machine_mode mode1,
1108                                   enum machine_mode mode2);
1109
1110 extern bool insn_operand_matches (enum insn_code icode, unsigned int opno,
1111                                   rtx operand);
1112
1113 /* Describes the type of an expand_operand.  Each value is associated
1114    with a create_*_operand function; see the comments above those
1115    functions for details.  */
1116 enum expand_operand_type {
1117   EXPAND_FIXED,
1118   EXPAND_OUTPUT,
1119   EXPAND_INPUT,
1120   EXPAND_CONVERT_TO,
1121   EXPAND_CONVERT_FROM,
1122   EXPAND_ADDRESS,
1123   EXPAND_INTEGER
1124 };
1125
1126 /* Information about an operand for instruction expansion.  */
1127 struct expand_operand {
1128   /* The type of operand.  */
1129   ENUM_BITFIELD (expand_operand_type) type : 8;
1130
1131   /* True if any conversion should treat VALUE as being unsigned
1132      rather than signed.  Only meaningful for certain types.  */
1133   unsigned int unsigned_p : 1;
1134
1135   /* Unused; available for future use.  */
1136   unsigned int unused : 7;
1137
1138   /* The mode passed to the convert_*_operand function.  It has a
1139      type-dependent meaning.  */
1140   ENUM_BITFIELD (machine_mode) mode : 16;
1141
1142   /* The value of the operand.  */
1143   rtx value;
1144 };
1145
1146 /* Initialize OP with the given fields.  Initialise the other fields
1147    to their default values.  */
1148
1149 static inline void
1150 create_expand_operand (struct expand_operand *op,
1151                        enum expand_operand_type type,
1152                        rtx value, enum machine_mode mode,
1153                        bool unsigned_p)
1154 {
1155   op->type = type;
1156   op->unsigned_p = unsigned_p;
1157   op->unused = 0;
1158   op->mode = mode;
1159   op->value = value;
1160 }
1161
1162 /* Make OP describe an operand that must use rtx X, even if X is volatile.  */
1163
1164 static inline void
1165 create_fixed_operand (struct expand_operand *op, rtx x)
1166 {
1167   create_expand_operand (op, EXPAND_FIXED, x, VOIDmode, false);
1168 }
1169
1170 /* Make OP describe an output operand that must have mode MODE.
1171    X, if nonnull, is a suggestion for where the output should be stored.
1172    It is OK for VALUE to be inconsistent with MODE, although it will just
1173    be ignored in that case.  */
1174
1175 static inline void
1176 create_output_operand (struct expand_operand *op, rtx x,
1177                        enum machine_mode mode)
1178 {
1179   create_expand_operand (op, EXPAND_OUTPUT, x, mode, false);
1180 }
1181
1182 /* Make OP describe an input operand that must have mode MODE and
1183    value VALUE; MODE cannot be VOIDmode.  The backend may request that
1184    VALUE be copied into a different kind of rtx before being passed
1185    as an operand.  */
1186
1187 static inline void
1188 create_input_operand (struct expand_operand *op, rtx value,
1189                       enum machine_mode mode)
1190 {
1191   create_expand_operand (op, EXPAND_INPUT, value, mode, false);
1192 }
1193
1194 /* Like create_input_operand, except that VALUE must first be converted
1195    to mode MODE.  UNSIGNED_P says whether VALUE is unsigned.  */
1196
1197 static inline void
1198 create_convert_operand_to (struct expand_operand *op, rtx value,
1199                            enum machine_mode mode, bool unsigned_p)
1200 {
1201   create_expand_operand (op, EXPAND_CONVERT_TO, value, mode, unsigned_p);
1202 }
1203
1204 /* Make OP describe an input operand that should have the same value
1205    as VALUE, after any mode conversion that the backend might request.
1206    If VALUE is a CONST_INT, it should be treated as having mode MODE.
1207    UNSIGNED_P says whether VALUE is unsigned.  */
1208
1209 static inline void
1210 create_convert_operand_from (struct expand_operand *op, rtx value,
1211                              enum machine_mode mode, bool unsigned_p)
1212 {
1213   create_expand_operand (op, EXPAND_CONVERT_FROM, value, mode, unsigned_p);
1214 }
1215
1216 extern void create_convert_operand_from_type (struct expand_operand *op,
1217                                               rtx value, tree type);
1218
1219 /* Make OP describe an input Pmode address operand.  VALUE is the value
1220    of the address, but it may need to be converted to Pmode first.  */
1221
1222 static inline void
1223 create_address_operand (struct expand_operand *op, rtx value)
1224 {
1225   create_expand_operand (op, EXPAND_ADDRESS, value, Pmode, false);
1226 }
1227
1228 /* Make OP describe an input operand that has value INTVAL and that has
1229    no inherent mode.  This function should only be used for operands that
1230    are always expand-time constants.  The backend may request that INTVAL
1231    be copied into a different kind of rtx, but it must specify the mode
1232    of that rtx if so.  */
1233
1234 static inline void
1235 create_integer_operand (struct expand_operand *op, HOST_WIDE_INT intval)
1236 {
1237   create_expand_operand (op, EXPAND_INTEGER, GEN_INT (intval), VOIDmode, false);
1238 }
1239
1240 extern bool valid_multiword_target_p (rtx);
1241
1242 extern bool maybe_legitimize_operands (enum insn_code icode,
1243                                        unsigned int opno, unsigned int nops,
1244                                        struct expand_operand *ops);
1245 extern rtx maybe_gen_insn (enum insn_code icode, unsigned int nops,
1246                            struct expand_operand *ops);
1247 extern bool maybe_expand_insn (enum insn_code icode, unsigned int nops,
1248                                struct expand_operand *ops);
1249 extern bool maybe_expand_jump_insn (enum insn_code icode, unsigned int nops,
1250                                     struct expand_operand *ops);
1251 extern void expand_insn (enum insn_code icode, unsigned int nops,
1252                          struct expand_operand *ops);
1253 extern void expand_jump_insn (enum insn_code icode, unsigned int nops,
1254                               struct expand_operand *ops);
1255
1256 extern rtx prepare_operand (enum insn_code, rtx, int, enum machine_mode,
1257                             enum machine_mode, int);
1258
1259 #endif /* GCC_OPTABS_H */