gcc/optabs.h

   1 /* Definitions for code generation pass of GNU compiler.
   2    Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
   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 2, 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 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_OPTABS_H
  23 #define GCC_OPTABS_H
  24
  25 #include "insn-codes.h"
  26
  27 /* Optabs are tables saying how to generate insn bodies
  28    for various machine modes and numbers of operands.
  29    Each optab applies to one operation.
  30
  31    For example, add_optab applies to addition.
  32
  33    The insn_code slot is the enum insn_code that says how to
  34    generate an insn for this operation on a particular machine mode.
  35    It is CODE_FOR_nothing if there is no such insn on the target machine.
  36
  37    The `lib_call' slot is the name of the library function that
  38    can be used to perform the operation.
  39
  40    A few optabs, such as move_optab and cmp_optab, are used
  41    by special code.  */
  42
  43 struct optab_handlers GTY(())
  44 {
  45   enum insn_code insn_code;
  46   rtx libfunc;
  47 };
  48
  49 struct optab GTY(())
  50 {
  51   enum rtx_code code;
  52   struct optab_handlers handlers[NUM_MACHINE_MODES];
  53 };
  54 typedef struct optab * optab;
  55
  56 /* A convert_optab is for some sort of conversion operation between
  57    modes.  The first array index is the destination mode, the second
  58    is the source mode.  */
  59 struct convert_optab GTY(())
  60 {
  61   enum rtx_code code;
  62   struct optab_handlers handlers[NUM_MACHINE_MODES][NUM_MACHINE_MODES];
  63 };
  64 typedef struct convert_optab *convert_optab;
  65
  66 /* Given an enum insn_code, access the function to construct
  67    the body of that kind of insn.  */
  68 #define GEN_FCN(CODE) (insn_data[CODE].genfun)
  69
  70 /* Enumeration of valid indexes into optab_table.  */
  71 enum optab_index
  72 {
  73   OTI_add,
  74   OTI_addv,
  75   OTI_sub,
  76   OTI_subv,
  77
  78   /* Signed and fp multiply */
  79   OTI_smul,
  80   OTI_smulv,
  81   /* Signed multiply, return high word */
  82   OTI_smul_highpart,
  83   OTI_umul_highpart,
  84   /* Signed multiply with result one machine mode wider than args */
  85   OTI_smul_widen,
  86   OTI_umul_widen,
  87   /* Widening multiply of one unsigned and one signed operand.  */
  88   OTI_usmul_widen,
  89   /* Signed multiply and add with the result and addend one machine mode
  90      wider than the multiplicand and multiplier.  */
  91   OTI_smadd_widen,
  92   /* Unsigned multiply and add with the result and addend one machine mode
  93      wider than the multiplicand and multiplier.  */
  94   OTI_umadd_widen,
  95   /* Signed multiply and subtract the result and minuend one machine mode
  96      wider than the multiplicand and multiplier.  */
  97   OTI_smsub_widen,
  98   /* Unsigned multiply and subtract the result and minuend one machine mode
  99      wider than the multiplicand and multiplier.  */
 100   OTI_umsub_widen,
 101
 102   /* Signed divide */
 103   OTI_sdiv,
 104   OTI_sdivv,
 105   /* Signed divide-and-remainder in one */
 106   OTI_sdivmod,
 107   OTI_udiv,
 108   OTI_udivmod,
 109   /* Signed remainder */
 110   OTI_smod,
 111   OTI_umod,
 112   /* Floating point remainder functions */
 113   OTI_fmod,
 114   OTI_remainder,
 115   /* Convert float to integer in float fmt */
 116   OTI_ftrunc,
 117
 118   /* Logical and */
 119   OTI_and,
 120   /* Logical or */
 121   OTI_ior,
 122   /* Logical xor */
 123   OTI_xor,
 124
 125   /* Arithmetic shift left */
 126   OTI_ashl,
 127   /* Logical shift right */
 128   OTI_lshr,
 129   /* Arithmetic shift right */
 130   OTI_ashr,
 131   /* Rotate left */
 132   OTI_rotl,
 133   /* Rotate right */
 134   OTI_rotr,
 135   /* Signed and floating-point minimum value */
 136   OTI_smin,
 137   /* Signed and floating-point maximum value */
 138   OTI_smax,
 139   /* Unsigned minimum value */
 140   OTI_umin,
 141   /* Unsigned maximum value */
 142   OTI_umax,
 143   /* Power */
 144   OTI_pow,
 145   /* Arc tangent of y/x */
 146   OTI_atan2,
 147
 148   /* Move instruction.  */
 149   OTI_mov,
 150   /* Move, preserving high part of register.  */
 151   OTI_movstrict,
 152   /* Move, with a misaligned memory.  */
 153   OTI_movmisalign,
 154   /* Nontemporal store.  */
 155   OTI_storent,
 156
 157   /* Unary operations */
 158   /* Negation */
 159   OTI_neg,
 160   OTI_negv,
 161   /* Abs value */
 162   OTI_abs,
 163   OTI_absv,
 164   /* Byteswap */
 165   OTI_bswap,
 166   /* Bitwise not */
 167   OTI_one_cmpl,
 168   /* Bit scanning and counting */
 169   OTI_ffs,
 170   OTI_clz,
 171   OTI_ctz,
 172   OTI_popcount,
 173   OTI_parity,
 174   /* Square root */
 175   OTI_sqrt,
 176   /* Sine-Cosine */
 177   OTI_sincos,
 178   /* Sine */
 179   OTI_sin,
 180   /* Inverse sine */
 181   OTI_asin,
 182   /* Cosine */
 183   OTI_cos,
 184   /* Inverse cosine */
 185   OTI_acos,
 186   /* Exponential */
 187   OTI_exp,
 188   /* Base-10 Exponential */
 189   OTI_exp10,
 190   /* Base-2 Exponential */
 191   OTI_exp2,
 192   /* Exponential - 1*/
 193   OTI_expm1,
 194   /* Load exponent of a floating point number */
 195   OTI_ldexp,
 196   /* Multiply floating-point number by integral power of radix */
 197   OTI_scalb,
 198   /* Radix-independent exponent */
 199   OTI_logb,
 200   OTI_ilogb,
 201   /* Natural Logarithm */
 202   OTI_log,
 203   /* Base-10 Logarithm */
 204   OTI_log10,
 205   /* Base-2 Logarithm */
 206   OTI_log2,
 207   /* logarithm of 1 plus argument */
 208   OTI_log1p,
 209   /* Rounding functions */
 210   OTI_floor,
 211   OTI_ceil,
 212   OTI_btrunc,
 213   OTI_round,
 214   OTI_nearbyint,
 215   OTI_rint,
 216   /* Tangent */
 217   OTI_tan,
 218   /* Inverse tangent */
 219   OTI_atan,
 220   /* Copy sign */
 221   OTI_copysign,
 222
 223   /* Test for infinite value */
 224   OTI_isinf,
 225
 226   /* Compare insn; two operands.  */
 227   OTI_cmp,
 228   /* Used only for libcalls for unsigned comparisons.  */
 229   OTI_ucmp,
 230   /* tst insn; compare one operand against 0 */
 231   OTI_tst,
 232
 233   /* Floating point comparison optabs - used primarily for libfuncs */
 234   OTI_eq,
 235   OTI_ne,
 236   OTI_gt,
 237   OTI_ge,
 238   OTI_lt,
 239   OTI_le,
 240   OTI_unord,
 241
 242   /* String length */
 243   OTI_strlen,
 244
 245   /* Combined compare & jump/store flags/move operations.  */
 246   OTI_cbranch,
 247   OTI_cmov,
 248   OTI_cstore,
 249
 250   /* Push instruction.  */
 251   OTI_push,
 252
 253   /* Conditional add instruction.  */
 254   OTI_addcc,
 255
 256   /* Reduction operations on a vector operand.  */
 257   OTI_reduc_smax,
 258   OTI_reduc_umax,
 259   OTI_reduc_smin,
 260   OTI_reduc_umin,
 261   OTI_reduc_splus,
 262   OTI_reduc_uplus,
 263
 264   /* Summation, with result machine mode one or more wider than args.  */
 265   OTI_ssum_widen,
 266   OTI_usum_widen,
 267
 268   /* Dot product, with result machine mode one or more wider than args.  */
 269   OTI_sdot_prod,
 270   OTI_udot_prod,
 271
 272   /* Set specified field of vector operand.  */
 273   OTI_vec_set,
 274   /* Extract specified field of vector operand.  */
 275   OTI_vec_extract,
 276   /* Extract even/odd fields of vector operands.  */
 277   OTI_vec_extract_even,
 278   OTI_vec_extract_odd,
 279   /* Interleave fields of vector operands.  */
 280   OTI_vec_interleave_high,
 281   OTI_vec_interleave_low,
 282   /* Initialize vector operand.  */
 283   OTI_vec_init,
 284   /* Whole vector shift. The shift amount is in bits.  */
 285   OTI_vec_shl,
 286   OTI_vec_shr,
 287   /* Extract specified elements from vectors, for vector load.  */
 288   OTI_vec_realign_load,
 289   /* Widening multiplication.
 290      The high/low part of the resulting vector of products is returned.  */
 291   OTI_vec_widen_umult_hi,
 292   OTI_vec_widen_umult_lo,
 293   OTI_vec_widen_smult_hi,
 294   OTI_vec_widen_smult_lo,
 295   /* Extract and widen the high/low part of a vector of signed or
 296      floating point elements.  */
 297   OTI_vec_unpacks_hi,
 298   OTI_vec_unpacks_lo,
 299   /* Extract and widen the high/low part of a vector of unsigned
 300      elements.  */
 301   OTI_vec_unpacku_hi,
 302   OTI_vec_unpacku_lo,
 303
 304   /* Extract, convert to floating point and widen the high/low part of
 305      a vector of signed or unsigned integer elements.  */
 306   OTI_vec_unpacks_float_hi,
 307   OTI_vec_unpacks_float_lo,
 308   OTI_vec_unpacku_float_hi,
 309   OTI_vec_unpacku_float_lo,
 310
 311   /* Narrow (demote) and merge the elements of two vectors.  */
 312   OTI_vec_pack_trunc,
 313   OTI_vec_pack_usat,
 314   OTI_vec_pack_ssat,
 315
 316   /* Convert to signed/unsigned integer, narrow and merge elements
 317      of two vectors of floating point elements.  */
 318   OTI_vec_pack_sfix_trunc,
 319   OTI_vec_pack_ufix_trunc,
 320
 321   /* Perform a raise to the power of integer.  */
 322   OTI_powi,
 323
 324   OTI_MAX
 325 };
 326
 327 extern GTY(()) optab optab_table[OTI_MAX];
 328
 329 #define add_optab (optab_table[OTI_add])
 330 #define sub_optab (optab_table[OTI_sub])
 331 #define smul_optab (optab_table[OTI_smul])
 332 #define addv_optab (optab_table[OTI_addv])
 333 #define subv_optab (optab_table[OTI_subv])
 334 #define smul_highpart_optab (optab_table[OTI_smul_highpart])
 335 #define umul_highpart_optab (optab_table[OTI_umul_highpart])
 336 #define smul_widen_optab (optab_table[OTI_smul_widen])
 337 #define umul_widen_optab (optab_table[OTI_umul_widen])
 338 #define usmul_widen_optab (optab_table[OTI_usmul_widen])
 339 #define smadd_widen_optab (optab_table[OTI_smadd_widen])
 340 #define umadd_widen_optab (optab_table[OTI_umadd_widen])
 341 #define smsub_widen_optab (optab_table[OTI_smsub_widen])
 342 #define umsub_widen_optab (optab_table[OTI_umsub_widen])
 343 #define sdiv_optab (optab_table[OTI_sdiv])
 344 #define smulv_optab (optab_table[OTI_smulv])
 345 #define sdivv_optab (optab_table[OTI_sdivv])
 346 #define sdivmod_optab (optab_table[OTI_sdivmod])
 347 #define udiv_optab (optab_table[OTI_udiv])
 348 #define udivmod_optab (optab_table[OTI_udivmod])
 349 #define smod_optab (optab_table[OTI_smod])
 350 #define umod_optab (optab_table[OTI_umod])
 351 #define fmod_optab (optab_table[OTI_fmod])
 352 #define remainder_optab (optab_table[OTI_remainder])
 353 #define ftrunc_optab (optab_table[OTI_ftrunc])
 354 #define and_optab (optab_table[OTI_and])
 355 #define ior_optab (optab_table[OTI_ior])
 356 #define xor_optab (optab_table[OTI_xor])
 357 #define ashl_optab (optab_table[OTI_ashl])
 358 #define lshr_optab (optab_table[OTI_lshr])
 359 #define ashr_optab (optab_table[OTI_ashr])
 360 #define rotl_optab (optab_table[OTI_rotl])
 361 #define rotr_optab (optab_table[OTI_rotr])
 362 #define smin_optab (optab_table[OTI_smin])
 363 #define smax_optab (optab_table[OTI_smax])
 364 #define umin_optab (optab_table[OTI_umin])
 365 #define umax_optab (optab_table[OTI_umax])
 366 #define pow_optab (optab_table[OTI_pow])
 367 #define atan2_optab (optab_table[OTI_atan2])
 368
 369 #define mov_optab (optab_table[OTI_mov])
 370 #define movstrict_optab (optab_table[OTI_movstrict])
 371 #define movmisalign_optab (optab_table[OTI_movmisalign])
 372 #define storent_optab (optab_table[OTI_storent])
 373
 374 #define neg_optab (optab_table[OTI_neg])
 375 #define negv_optab (optab_table[OTI_negv])
 376 #define abs_optab (optab_table[OTI_abs])
 377 #define absv_optab (optab_table[OTI_absv])
 378 #define one_cmpl_optab (optab_table[OTI_one_cmpl])
 379 #define bswap_optab (optab_table[OTI_bswap])
 380 #define ffs_optab (optab_table[OTI_ffs])
 381 #define clz_optab (optab_table[OTI_clz])
 382 #define ctz_optab (optab_table[OTI_ctz])
 383 #define popcount_optab (optab_table[OTI_popcount])
 384 #define parity_optab (optab_table[OTI_parity])
 385 #define sqrt_optab (optab_table[OTI_sqrt])
 386 #define sincos_optab (optab_table[OTI_sincos])
 387 #define sin_optab (optab_table[OTI_sin])
 388 #define asin_optab (optab_table[OTI_asin])
 389 #define cos_optab (optab_table[OTI_cos])
 390 #define acos_optab (optab_table[OTI_acos])
 391 #define exp_optab (optab_table[OTI_exp])
 392 #define exp10_optab (optab_table[OTI_exp10])
 393 #define exp2_optab (optab_table[OTI_exp2])
 394 #define expm1_optab (optab_table[OTI_expm1])
 395 #define ldexp_optab (optab_table[OTI_ldexp])
 396 #define scalb_optab (optab_table[OTI_scalb])
 397 #define logb_optab (optab_table[OTI_logb])
 398 #define ilogb_optab (optab_table[OTI_ilogb])
 399 #define log_optab (optab_table[OTI_log])
 400 #define log10_optab (optab_table[OTI_log10])
 401 #define log2_optab (optab_table[OTI_log2])
 402 #define log1p_optab (optab_table[OTI_log1p])
 403 #define floor_optab (optab_table[OTI_floor])
 404 #define ceil_optab (optab_table[OTI_ceil])
 405 #define btrunc_optab (optab_table[OTI_btrunc])
 406 #define round_optab (optab_table[OTI_round])
 407 #define nearbyint_optab (optab_table[OTI_nearbyint])
 408 #define rint_optab (optab_table[OTI_rint])
 409 #define tan_optab (optab_table[OTI_tan])
 410 #define atan_optab (optab_table[OTI_atan])
 411 #define copysign_optab (optab_table[OTI_copysign])
 412
 413 #define isinf_optab (optab_table[OTI_isinf])
 414
 415 #define cmp_optab (optab_table[OTI_cmp])
 416 #define ucmp_optab (optab_table[OTI_ucmp])
 417 #define tst_optab (optab_table[OTI_tst])
 418
 419 #define eq_optab (optab_table[OTI_eq])
 420 #define ne_optab (optab_table[OTI_ne])
 421 #define gt_optab (optab_table[OTI_gt])
 422 #define ge_optab (optab_table[OTI_ge])
 423 #define lt_optab (optab_table[OTI_lt])
 424 #define le_optab (optab_table[OTI_le])
 425 #define unord_optab (optab_table[OTI_unord])
 426
 427 #define strlen_optab (optab_table[OTI_strlen])
 428
 429 #define cbranch_optab (optab_table[OTI_cbranch])
 430 #define cmov_optab (optab_table[OTI_cmov])
 431 #define cstore_optab (optab_table[OTI_cstore])
 432 #define push_optab (optab_table[OTI_push])
 433 #define addcc_optab (optab_table[OTI_addcc])
 434
 435 #define reduc_smax_optab (optab_table[OTI_reduc_smax])
 436 #define reduc_umax_optab (optab_table[OTI_reduc_umax])
 437 #define reduc_smin_optab (optab_table[OTI_reduc_smin])
 438 #define reduc_umin_optab (optab_table[OTI_reduc_umin])
 439 #define reduc_splus_optab (optab_table[OTI_reduc_splus])
 440 #define reduc_uplus_optab (optab_table[OTI_reduc_uplus])
 441
 442 #define ssum_widen_optab (optab_table[OTI_ssum_widen])
 443 #define usum_widen_optab (optab_table[OTI_usum_widen])
 444 #define sdot_prod_optab (optab_table[OTI_sdot_prod])
 445 #define udot_prod_optab (optab_table[OTI_udot_prod])
 446
 447 #define vec_set_optab (optab_table[OTI_vec_set])
 448 #define vec_extract_optab (optab_table[OTI_vec_extract])
 449 #define vec_extract_even_optab (optab_table[OTI_vec_extract_even])
 450 #define vec_extract_odd_optab (optab_table[OTI_vec_extract_odd])
 451 #define vec_interleave_high_optab (optab_table[OTI_vec_interleave_high])
 452 #define vec_interleave_low_optab (optab_table[OTI_vec_interleave_low])
 453 #define vec_init_optab (optab_table[OTI_vec_init])
 454 #define vec_shl_optab (optab_table[OTI_vec_shl])
 455 #define vec_shr_optab (optab_table[OTI_vec_shr])
 456 #define vec_realign_load_optab (optab_table[OTI_vec_realign_load])
 457 #define vec_widen_umult_hi_optab (optab_table[OTI_vec_widen_umult_hi])
 458 #define vec_widen_umult_lo_optab (optab_table[OTI_vec_widen_umult_lo])
 459 #define vec_widen_smult_hi_optab (optab_table[OTI_vec_widen_smult_hi])
 460 #define vec_widen_smult_lo_optab (optab_table[OTI_vec_widen_smult_lo])
 461 #define vec_unpacks_hi_optab (optab_table[OTI_vec_unpacks_hi])
 462 #define vec_unpacks_lo_optab (optab_table[OTI_vec_unpacks_lo])
 463 #define vec_unpacku_hi_optab (optab_table[OTI_vec_unpacku_hi])
 464 #define vec_unpacku_lo_optab (optab_table[OTI_vec_unpacku_lo])
 465 #define vec_unpacks_float_hi_optab (optab_table[OTI_vec_unpacks_float_hi])
 466 #define vec_unpacks_float_lo_optab (optab_table[OTI_vec_unpacks_float_lo])
 467 #define vec_unpacku_float_hi_optab (optab_table[OTI_vec_unpacku_float_hi])
 468 #define vec_unpacku_float_lo_optab (optab_table[OTI_vec_unpacku_float_lo])
 469 #define vec_pack_trunc_optab (optab_table[OTI_vec_pack_trunc])
 470 #define vec_pack_ssat_optab (optab_table[OTI_vec_pack_ssat])
 471 #define vec_pack_usat_optab (optab_table[OTI_vec_pack_usat])
 472 #define vec_pack_sfix_trunc_optab (optab_table[OTI_vec_pack_sfix_trunc])
 473 #define vec_pack_ufix_trunc_optab (optab_table[OTI_vec_pack_ufix_trunc])
 474
 475 #define powi_optab (optab_table[OTI_powi])
 476
 477 /* Conversion optabs have their own table and indexes.  */
 478 enum convert_optab_index
 479 {
 480   COI_sext,
 481   COI_zext,
 482   COI_trunc,
 483
 484   COI_sfix,
 485   COI_ufix,
 486
 487   COI_sfixtrunc,
 488   COI_ufixtrunc,
 489
 490   COI_sfloat,
 491   COI_ufloat,
 492
 493   COI_lrint,
 494   COI_lround,
 495   COI_lfloor,
 496   COI_lceil,
 497
 498   COI_MAX
 499 };
 500
 501 extern GTY(()) convert_optab convert_optab_table[COI_MAX];
 502
 503 #define sext_optab (convert_optab_table[COI_sext])
 504 #define zext_optab (convert_optab_table[COI_zext])
 505 #define trunc_optab (convert_optab_table[COI_trunc])
 506 #define sfix_optab (convert_optab_table[COI_sfix])
 507 #define ufix_optab (convert_optab_table[COI_ufix])
 508 #define sfixtrunc_optab (convert_optab_table[COI_sfixtrunc])
 509 #define ufixtrunc_optab (convert_optab_table[COI_ufixtrunc])
 510 #define sfloat_optab (convert_optab_table[COI_sfloat])
 511 #define ufloat_optab (convert_optab_table[COI_ufloat])
 512 #define lrint_optab (convert_optab_table[COI_lrint])
 513 #define lround_optab (convert_optab_table[COI_lround])
 514 #define lfloor_optab (convert_optab_table[COI_lfloor])
 515 #define lceil_optab (convert_optab_table[COI_lceil])
 516
 517 /* These arrays record the insn_code of insns that may be needed to
 518    perform input and output reloads of special objects.  They provide a
 519    place to pass a scratch register.  */
 520 extern enum insn_code reload_in_optab[NUM_MACHINE_MODES];
 521 extern enum insn_code reload_out_optab[NUM_MACHINE_MODES];
 522
 523 /* Contains the optab used for each rtx code.  */
 524 extern GTY(()) optab code_to_optab[NUM_RTX_CODE + 1];
 525
 526 \f
 527 typedef rtx (*rtxfun) (rtx);
 528
 529 /* Indexed by the rtx-code for a conditional (e.g. EQ, LT,...)
 530    gives the gen_function to make a branch to test that condition.  */
 531
 532 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 533
 534 /* Indexed by the rtx-code for a conditional (e.g. EQ, LT,...)
 535    gives the insn code to make a store-condition insn
 536    to test that condition.  */
 537
 538 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 539
 540 #ifdef HAVE_conditional_move
 541 /* Indexed by the machine mode, gives the insn code to make a conditional
 542    move insn.  */
 543
 544 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 545 #endif
 546
 547 /* Indexed by the machine mode, gives the insn code for vector conditional
 548    operation.  */
 549
 550 extern enum insn_code vcond_gen_code[NUM_MACHINE_MODES];
 551 extern enum insn_code vcondu_gen_code[NUM_MACHINE_MODES];
 552
 553 /* This array records the insn_code of insns to perform block moves.  */
 554 extern enum insn_code movmem_optab[NUM_MACHINE_MODES];
 555
 556 /* This array records the insn_code of insns to perform block sets.  */
 557 extern enum insn_code setmem_optab[NUM_MACHINE_MODES];
 558
 559 /* These arrays record the insn_code of two different kinds of insns
 560    to perform block compares.  */
 561 extern enum insn_code cmpstr_optab[NUM_MACHINE_MODES];
 562 extern enum insn_code cmpstrn_optab[NUM_MACHINE_MODES];
 563 extern enum insn_code cmpmem_optab[NUM_MACHINE_MODES];
 564
 565 /* Synchronization primitives.  This first set is atomic operation for
 566    which we don't care about the resulting value.  */
 567 extern enum insn_code sync_add_optab[NUM_MACHINE_MODES];
 568 extern enum insn_code sync_sub_optab[NUM_MACHINE_MODES];
 569 extern enum insn_code sync_ior_optab[NUM_MACHINE_MODES];
 570 extern enum insn_code sync_and_optab[NUM_MACHINE_MODES];
 571 extern enum insn_code sync_xor_optab[NUM_MACHINE_MODES];
 572 extern enum insn_code sync_nand_optab[NUM_MACHINE_MODES];
 573
 574 /* This second set is atomic operations in which we return the value
 575    that existed in memory before the operation.  */
 576 extern enum insn_code sync_old_add_optab[NUM_MACHINE_MODES];
 577 extern enum insn_code sync_old_sub_optab[NUM_MACHINE_MODES];
 578 extern enum insn_code sync_old_ior_optab[NUM_MACHINE_MODES];
 579 extern enum insn_code sync_old_and_optab[NUM_MACHINE_MODES];
 580 extern enum insn_code sync_old_xor_optab[NUM_MACHINE_MODES];
 581 extern enum insn_code sync_old_nand_optab[NUM_MACHINE_MODES];
 582
 583 /* This third set is atomic operations in which we return the value
 584    that resulted after performing the operation.  */
 585 extern enum insn_code sync_new_add_optab[NUM_MACHINE_MODES];
 586 extern enum insn_code sync_new_sub_optab[NUM_MACHINE_MODES];
 587 extern enum insn_code sync_new_ior_optab[NUM_MACHINE_MODES];
 588 extern enum insn_code sync_new_and_optab[NUM_MACHINE_MODES];
 589 extern enum insn_code sync_new_xor_optab[NUM_MACHINE_MODES];
 590 extern enum insn_code sync_new_nand_optab[NUM_MACHINE_MODES];
 591
 592 /* Atomic compare and swap.  */
 593 extern enum insn_code sync_compare_and_swap[NUM_MACHINE_MODES];
 594 extern enum insn_code sync_compare_and_swap_cc[NUM_MACHINE_MODES];
 595
 596 /* Atomic exchange with acquire semantics.  */
 597 extern enum insn_code sync_lock_test_and_set[NUM_MACHINE_MODES];
 598
 599 /* Atomic clear with release semantics.  */
 600 extern enum insn_code sync_lock_release[NUM_MACHINE_MODES];
 601
 602 /* Define functions given in optabs.c.  */
 603
 604 extern rtx expand_widen_pattern_expr (tree exp, rtx op0, rtx op1, rtx wide_op,
 605                                       rtx target, int unsignedp);
 606
 607 extern rtx expand_ternary_op (enum machine_mode mode, optab ternary_optab,
 608                               rtx op0, rtx op1, rtx op2, rtx target,
 609                               int unsignedp);
 610
 611 /* Expand a binary operation given optab and rtx operands.  */
 612 extern rtx expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
 613                          enum optab_methods);
 614
 615 extern bool force_expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
 616                                 enum optab_methods);
 617
 618 /* Expand a binary operation with both signed and unsigned forms.  */
 619 extern rtx sign_expand_binop (enum machine_mode, optab, optab, rtx, rtx,
 620                               rtx, int, enum optab_methods);
 621
 622 /* Generate code to perform an operation on one operand with two results.  */
 623 extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
 624
 625 /* Generate code to perform an operation on two operands with two results.  */
 626 extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
 627
 628 /* Generate code to perform an operation on two operands with two
 629    results, using a library function.  */
 630 extern bool expand_twoval_binop_libfunc (optab, rtx, rtx, rtx, rtx,
 631                                          enum rtx_code);
 632
 633 /* Expand a unary arithmetic operation given optab rtx operand.  */
 634 extern rtx expand_unop (enum machine_mode, optab, rtx, rtx, int);
 635
 636 /* Expand the absolute value operation.  */
 637 extern rtx expand_abs_nojump (enum machine_mode, rtx, rtx, int);
 638 extern rtx expand_abs (enum machine_mode, rtx, rtx, int, int);
 639
 640 /* Expand the copysign operation.  */
 641 extern rtx expand_copysign (rtx, rtx, rtx);
 642
 643 /* Generate an instruction with a given INSN_CODE with an output and
 644    an input.  */
 645 extern void emit_unop_insn (int, rtx, rtx, enum rtx_code);
 646
 647 /* Excapsulate the block in REG_LIBCALL, and REG_RETVAL reg notes and add
 648    REG_LIBCALL_ID notes to all insns in block.  */
 649 extern void maybe_encapsulate_block (rtx, rtx, rtx);
 650
 651 /* Emit code to perform a series of operations on a multi-word quantity, one
 652    word at a time.  */
 653 extern rtx emit_no_conflict_block (rtx, rtx, rtx, rtx, rtx);
 654
 655 /* Emit one rtl insn to compare two rtx's.  */
 656 extern void emit_cmp_insn (rtx, rtx, enum rtx_code, rtx, enum machine_mode,
 657                            int);
 658
 659 /* The various uses that a comparison can have; used by can_compare_p:
 660    jumps, conditional moves, store flag operations.  */
 661 enum can_compare_purpose
 662 {
 663   ccp_jump,
 664   ccp_cmov,
 665   ccp_store_flag
 666 };
 667
 668 /* Return the optab used for computing the given operation on the type
 669    given by the second argument.  */
 670 extern optab optab_for_tree_code (enum tree_code, tree);
 671
 672 /* Nonzero if a compare of mode MODE can be done straightforwardly
 673    (without splitting it into pieces).  */
 674 extern int can_compare_p (enum rtx_code, enum machine_mode,
 675                           enum can_compare_purpose);
 676
 677 /* Return the INSN_CODE to use for an extend operation.  */
 678 extern enum insn_code can_extend_p (enum machine_mode, enum machine_mode, int);
 679
 680 /* Generate the body of an insn to extend Y (with mode MFROM)
 681    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 682 extern rtx gen_extend_insn (rtx, rtx, enum machine_mode,
 683                             enum machine_mode, int);
 684
 685 /* Call this to reset the function entry for one optab.  */
 686 extern void set_optab_libfunc (optab, enum machine_mode, const char *);
 687 extern void set_conv_libfunc (convert_optab, enum machine_mode,
 688                               enum machine_mode, const char *);
 689
 690 /* Generate code for a FLOAT_EXPR.  */
 691 extern void expand_float (rtx, rtx, int);
 692
 693 /* Generate code for a FIX_EXPR.  */
 694 extern void expand_fix (rtx, rtx, int);
 695
 696 /* Generate code for float to integral conversion.  */
 697 extern bool expand_sfix_optab (rtx, rtx, convert_optab);
 698
 699 /* Return tree if target supports vector operations for COND_EXPR.  */
 700 bool expand_vec_cond_expr_p (tree, enum machine_mode);
 701
 702 /* Generate code for VEC_COND_EXPR.  */
 703 extern rtx expand_vec_cond_expr (tree, rtx);
 704
 705 /* Generate code for VEC_LSHIFT_EXPR and VEC_RSHIFT_EXPR.  */
 706 extern rtx expand_vec_shift_expr (tree, rtx);
 707
 708 #endif /* GCC_OPTABS_H */