gcc/optabs.h

   1 /* Definitions for code generation pass of GNU compiler.
   2    Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  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    For example, add_optab applies to addition.
  30
  31    The insn_code slot is the enum insn_code that says how to
  32    generate an insn for this operation on a particular machine mode.
  33    It is CODE_FOR_nothing if there is no such insn on the target machine.
  34
  35    The `lib_call' slot is the name of the library function that
  36    can be used to perform the operation.
  37
  38    A few optabs, such as move_optab and cmp_optab, are used
  39    by special code.  */
  40
  41 struct optab_handlers GTY(())
  42 {
  43   enum insn_code insn_code;
  44   rtx libfunc;
  45 };
  46
  47 struct optab GTY(())
  48 {
  49   enum rtx_code code;
  50   struct optab_handlers handlers[NUM_MACHINE_MODES];
  51 };
  52 typedef struct optab * optab;
  53
  54 /* A convert_optab is for some sort of conversion operation between
  55    modes.  The first array index is the destination mode, the second
  56    is the source mode.  */
  57 struct convert_optab GTY(())
  58 {
  59   enum rtx_code code;
  60   struct optab_handlers handlers[NUM_MACHINE_MODES][NUM_MACHINE_MODES];
  61 };
  62 typedef struct convert_optab *convert_optab;
  63
  64 /* Given an enum insn_code, access the function to construct
  65    the body of that kind of insn.  */
  66 #define GEN_FCN(CODE) (insn_data[CODE].genfun)
  67
  68 /* Enumeration of valid indexes into optab_table.  */
  69 enum optab_index
  70 {
  71   OTI_add,
  72   OTI_addv,
  73   OTI_sub,
  74   OTI_subv,
  75
  76   /* Signed and fp multiply */
  77   OTI_smul,
  78   OTI_smulv,
  79   /* Signed multiply, return high word */
  80   OTI_smul_highpart,
  81   OTI_umul_highpart,
  82   /* Signed multiply with result one machine mode wider than args */
  83   OTI_smul_widen,
  84   OTI_umul_widen,
  85
  86   /* Signed divide */
  87   OTI_sdiv,
  88   OTI_sdivv,
  89   /* Signed divide-and-remainder in one */
  90   OTI_sdivmod,
  91   OTI_udiv,
  92   OTI_udivmod,
  93   /* Signed remainder */
  94   OTI_smod,
  95   OTI_umod,
  96   /* Convert float to integer in float fmt */
  97   OTI_ftrunc,
  98
  99   /* Logical and */
 100   OTI_and,
 101   /* Logical or */
 102   OTI_ior,
 103   /* Logical xor */
 104   OTI_xor,
 105
 106   /* Arithmetic shift left */
 107   OTI_ashl,
 108   /* Logical shift right */
 109   OTI_lshr,
 110   /* Arithmetic shift right */
 111   OTI_ashr,
 112   /* Rotate left */
 113   OTI_rotl,
 114   /* Rotate right */
 115   OTI_rotr,
 116   /* Signed and floating-point minimum value */
 117   OTI_smin,
 118   /* Signed and floating-point maximum value */
 119   OTI_smax,
 120   /* Unsigned minimum value */
 121   OTI_umin,
 122   /* Unsigned maximum value */
 123   OTI_umax,
 124   /* Power */
 125   OTI_pow,
 126   /* Arc tangent of y/x */
 127   OTI_atan2,
 128
 129   /* Move instruction.  */
 130   OTI_mov,
 131   /* Move, preserving high part of register.  */
 132   OTI_movstrict,
 133
 134   /* Unary operations */
 135   /* Negation */
 136   OTI_neg,
 137   OTI_negv,
 138   /* Abs value */
 139   OTI_abs,
 140   OTI_absv,
 141   /* Bitwise not */
 142   OTI_one_cmpl,
 143   /* Bit scanning and counting */
 144   OTI_ffs,
 145   OTI_clz,
 146   OTI_ctz,
 147   OTI_popcount,
 148   OTI_parity,
 149   /* Square root */
 150   OTI_sqrt,
 151   /* Sine */
 152   OTI_sin,
 153   /* Cosine */
 154   OTI_cos,
 155   /* Exponential */
 156   OTI_exp,
 157   /* Natural Logarithm */
 158   OTI_log,
 159   /* Rounding functions */
 160   OTI_floor,
 161   OTI_ceil,
 162   OTI_trunc,
 163   OTI_round,
 164   OTI_nearbyint,
 165   /* Tangent */
 166   OTI_tan,
 167   /* Inverse tangent */
 168   OTI_atan,
 169
 170   /* Compare insn; two operands.  */
 171   OTI_cmp,
 172   /* Used only for libcalls for unsigned comparisons.  */
 173   OTI_ucmp,
 174   /* tst insn; compare one operand against 0 */
 175   OTI_tst,
 176
 177   /* Floating point comparison optabs - used primarily for libfuncs */
 178   OTI_eq,
 179   OTI_ne,
 180   OTI_gt,
 181   OTI_ge,
 182   OTI_lt,
 183   OTI_le,
 184   OTI_unord,
 185
 186   /* String length */
 187   OTI_strlen,
 188
 189   /* Combined compare & jump/store flags/move operations.  */
 190   OTI_cbranch,
 191   OTI_cmov,
 192   OTI_cstore,
 193
 194   /* Push instruction.  */
 195   OTI_push,
 196
 197   /* Conditional add instruction.  */
 198   OTI_addcc,
 199
 200   OTI_MAX
 201 };
 202
 203 extern GTY(()) optab optab_table[OTI_MAX];
 204
 205 #define add_optab (optab_table[OTI_add])
 206 #define sub_optab (optab_table[OTI_sub])
 207 #define smul_optab (optab_table[OTI_smul])
 208 #define addv_optab (optab_table[OTI_addv])
 209 #define subv_optab (optab_table[OTI_subv])
 210 #define smul_highpart_optab (optab_table[OTI_smul_highpart])
 211 #define umul_highpart_optab (optab_table[OTI_umul_highpart])
 212 #define smul_widen_optab (optab_table[OTI_smul_widen])
 213 #define umul_widen_optab (optab_table[OTI_umul_widen])
 214 #define sdiv_optab (optab_table[OTI_sdiv])
 215 #define smulv_optab (optab_table[OTI_smulv])
 216 #define sdivv_optab (optab_table[OTI_sdivv])
 217 #define sdivmod_optab (optab_table[OTI_sdivmod])
 218 #define udiv_optab (optab_table[OTI_udiv])
 219 #define udivmod_optab (optab_table[OTI_udivmod])
 220 #define smod_optab (optab_table[OTI_smod])
 221 #define umod_optab (optab_table[OTI_umod])
 222 #define ftrunc_optab (optab_table[OTI_ftrunc])
 223 #define and_optab (optab_table[OTI_and])
 224 #define ior_optab (optab_table[OTI_ior])
 225 #define xor_optab (optab_table[OTI_xor])
 226 #define ashl_optab (optab_table[OTI_ashl])
 227 #define lshr_optab (optab_table[OTI_lshr])
 228 #define ashr_optab (optab_table[OTI_ashr])
 229 #define rotl_optab (optab_table[OTI_rotl])
 230 #define rotr_optab (optab_table[OTI_rotr])
 231 #define smin_optab (optab_table[OTI_smin])
 232 #define smax_optab (optab_table[OTI_smax])
 233 #define umin_optab (optab_table[OTI_umin])
 234 #define umax_optab (optab_table[OTI_umax])
 235 #define pow_optab (optab_table[OTI_pow])
 236 #define atan2_optab (optab_table[OTI_atan2])
 237
 238 #define mov_optab (optab_table[OTI_mov])
 239 #define movstrict_optab (optab_table[OTI_movstrict])
 240
 241 #define neg_optab (optab_table[OTI_neg])
 242 #define negv_optab (optab_table[OTI_negv])
 243 #define abs_optab (optab_table[OTI_abs])
 244 #define absv_optab (optab_table[OTI_absv])
 245 #define one_cmpl_optab (optab_table[OTI_one_cmpl])
 246 #define ffs_optab (optab_table[OTI_ffs])
 247 #define clz_optab (optab_table[OTI_clz])
 248 #define ctz_optab (optab_table[OTI_ctz])
 249 #define popcount_optab (optab_table[OTI_popcount])
 250 #define parity_optab (optab_table[OTI_parity])
 251 #define sqrt_optab (optab_table[OTI_sqrt])
 252 #define sin_optab (optab_table[OTI_sin])
 253 #define cos_optab (optab_table[OTI_cos])
 254 #define exp_optab (optab_table[OTI_exp])
 255 #define log_optab (optab_table[OTI_log])
 256 #define floor_optab (optab_table[OTI_floor])
 257 #define ceil_optab (optab_table[OTI_ceil])
 258 #define btrunc_optab (optab_table[OTI_trunc])
 259 #define round_optab (optab_table[OTI_round])
 260 #define nearbyint_optab (optab_table[OTI_nearbyint])
 261 #define tan_optab (optab_table[OTI_tan])
 262 #define atan_optab (optab_table[OTI_atan])
 263
 264 #define cmp_optab (optab_table[OTI_cmp])
 265 #define ucmp_optab (optab_table[OTI_ucmp])
 266 #define tst_optab (optab_table[OTI_tst])
 267
 268 #define eq_optab (optab_table[OTI_eq])
 269 #define ne_optab (optab_table[OTI_ne])
 270 #define gt_optab (optab_table[OTI_gt])
 271 #define ge_optab (optab_table[OTI_ge])
 272 #define lt_optab (optab_table[OTI_lt])
 273 #define le_optab (optab_table[OTI_le])
 274 #define unord_optab (optab_table[OTI_unord])
 275
 276 #define strlen_optab (optab_table[OTI_strlen])
 277
 278 #define cbranch_optab (optab_table[OTI_cbranch])
 279 #define cmov_optab (optab_table[OTI_cmov])
 280 #define cstore_optab (optab_table[OTI_cstore])
 281 #define push_optab (optab_table[OTI_push])
 282 #define addcc_optab (optab_table[OTI_addcc])
 283
 284 /* Conversion optabs have their own table and indexes.  */
 285 enum convert_optab_index
 286 {
 287   CTI_sext,
 288   CTI_zext,
 289   CTI_trunc,
 290
 291   CTI_sfix,
 292   CTI_ufix,
 293
 294   CTI_sfixtrunc,
 295   CTI_ufixtrunc,
 296
 297   CTI_sfloat,
 298   CTI_ufloat,
 299
 300   CTI_MAX
 301 };
 302
 303 extern GTY(()) convert_optab convert_optab_table[CTI_MAX];
 304
 305 #define sext_optab (convert_optab_table[CTI_sext])
 306 #define zext_optab (convert_optab_table[CTI_zext])
 307 #define trunc_optab (convert_optab_table[CTI_trunc])
 308 #define sfix_optab (convert_optab_table[CTI_sfix])
 309 #define ufix_optab (convert_optab_table[CTI_ufix])
 310 #define sfixtrunc_optab (convert_optab_table[CTI_sfixtrunc])
 311 #define ufixtrunc_optab (convert_optab_table[CTI_ufixtrunc])
 312 #define sfloat_optab (convert_optab_table[CTI_sfloat])
 313 #define ufloat_optab (convert_optab_table[CTI_ufloat])
 314
 315 /* These arrays record the insn_code of insns that may be needed to
 316    perform input and output reloads of special objects.  They provide a
 317    place to pass a scratch register.  */
 318 extern enum insn_code reload_in_optab[NUM_MACHINE_MODES];
 319 extern enum insn_code reload_out_optab[NUM_MACHINE_MODES];
 320
 321 /* Contains the optab used for each rtx code.  */
 322 extern GTY(()) optab code_to_optab[NUM_RTX_CODE + 1];
 323
 324 \f
 325 typedef rtx (*rtxfun) (rtx);
 326
 327 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 328    gives the gen_function to make a branch to test that condition.  */
 329
 330 extern rtxfun bcc_gen_fctn[NUM_RTX_CODE];
 331
 332 /* Indexed by the rtx-code for a conditional (eg. EQ, LT,...)
 333    gives the insn code to make a store-condition insn
 334    to test that condition.  */
 335
 336 extern enum insn_code setcc_gen_code[NUM_RTX_CODE];
 337
 338 #ifdef HAVE_conditional_move
 339 /* Indexed by the machine mode, gives the insn code to make a conditional
 340    move insn.  */
 341
 342 extern enum insn_code movcc_gen_code[NUM_MACHINE_MODES];
 343 #endif
 344
 345 /* This array records the insn_code of insns to perform block moves.  */
 346 extern enum insn_code movstr_optab[NUM_MACHINE_MODES];
 347
 348 /* This array records the insn_code of insns to perform block clears.  */
 349 extern enum insn_code clrstr_optab[NUM_MACHINE_MODES];
 350
 351 /* These arrays record the insn_code of two different kinds of insns
 352    to perform block compares.  */
 353 extern enum insn_code cmpstr_optab[NUM_MACHINE_MODES];
 354 extern enum insn_code cmpmem_optab[NUM_MACHINE_MODES];
 355
 356 /* Define functions given in optabs.c.  */
 357
 358 /* Expand a binary operation given optab and rtx operands.  */
 359 extern rtx expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
 360                          enum optab_methods);
 361
 362 /* Expand a binary operation with both signed and unsigned forms.  */
 363 extern rtx sign_expand_binop (enum machine_mode, optab, optab, rtx, rtx,
 364                               rtx, int, enum optab_methods);
 365
 366 /* Generate code to perform an operation on two operands with two results.  */
 367 extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
 368
 369 /* Expand a unary arithmetic operation given optab rtx operand.  */
 370 extern rtx expand_unop (enum machine_mode, optab, rtx, rtx, int);
 371
 372 /* Expand the absolute value operation.  */
 373 extern rtx expand_abs_nojump (enum machine_mode, rtx, rtx, int);
 374 extern rtx expand_abs (enum machine_mode, rtx, rtx, int, int);
 375
 376 /* Expand the complex absolute value operation.  */
 377 extern rtx expand_complex_abs (enum machine_mode, rtx, rtx, int);
 378
 379 /* Generate an instruction with a given INSN_CODE with an output and
 380    an input.  */
 381 extern void emit_unop_insn (int, rtx, rtx, enum rtx_code);
 382
 383 /* Emit code to perform a series of operations on a multi-word quantity, one
 384    word at a time.  */
 385 extern rtx emit_no_conflict_block (rtx, rtx, rtx, rtx, rtx);
 386
 387 /* Emit one rtl instruction to store zero in specified rtx.  */
 388 extern void emit_clr_insn (rtx);
 389
 390 /* Emit one rtl insn to store 1 in specified rtx assuming it contains 0.  */
 391 extern void emit_0_to_1_insn (rtx);
 392
 393 /* Emit one rtl insn to compare two rtx's.  */
 394 extern void emit_cmp_insn (rtx, rtx, enum rtx_code, rtx, enum machine_mode,
 395                            int);
 396
 397 /* The various uses that a comparison can have; used by can_compare_p:
 398    jumps, conditional moves, store flag operations.  */
 399 enum can_compare_purpose
 400 {
 401   ccp_jump,
 402   ccp_cmov,
 403   ccp_store_flag
 404 };
 405
 406 /* Nonzero if a compare of mode MODE can be done straightforwardly
 407    (without splitting it into pieces).  */
 408 extern int can_compare_p (enum rtx_code, enum machine_mode,
 409                           enum can_compare_purpose);
 410
 411 extern rtx prepare_operand (int, rtx, int, enum machine_mode,
 412                             enum machine_mode, int);
 413
 414 /* Return the INSN_CODE to use for an extend operation.  */
 415 extern enum insn_code can_extend_p (enum machine_mode, enum machine_mode, int);
 416
 417 /* Generate the body of an insn to extend Y (with mode MFROM)
 418    into X (with mode MTO).  Do zero-extension if UNSIGNEDP is nonzero.  */
 419 extern rtx gen_extend_insn (rtx, rtx, enum machine_mode,
 420                             enum machine_mode, int);
 421
 422 /* Initialize the tables that control conversion between fixed and
 423    floating values.  */
 424 extern void init_fixtab (void);
 425 extern void init_floattab (void);
 426
 427 /* Call this to reset the function entry for one optab.  */
 428 extern void set_optab_libfunc (optab, enum machine_mode, const char *);
 429 extern void set_conv_libfunc (convert_optab, enum machine_mode,
 430                               enum machine_mode, const char *);
 431
 432 /* Generate code for a FLOAT_EXPR.  */
 433 extern void expand_float (rtx, rtx, int);
 434
 435 /* Generate code for a FIX_EXPR.  */
 436 extern void expand_fix (rtx, rtx, int);
 437
 438 #endif /* GCC_OPTABS_H */