2012-02-25 Catherine Moore <clm@codesourcery.com>
[official-gcc.git] / gcc / optabs.h
blob4de4409342de199bd2cc058ed9c1ad946729b354
1 /* Definitions for code generation pass of GNU compiler.
2 Copyright (C) 2001-2013 Free Software Foundation, Inc.
4 This file is part of GCC.
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 3, or (at your option)
9 any later version.
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.
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
20 #ifndef GCC_OPTABS_H
21 #define GCC_OPTABS_H
23 #include "insn-codes.h"
24 #include "insn-opinit.h"
26 typedef enum optab_tag optab;
27 typedef enum optab_tag convert_optab;
28 typedef enum optab_tag direct_optab;
30 struct optab_libcall_d
32 char libcall_suffix;
33 const char *libcall_basename;
34 void (*libcall_gen) (optab, const char *name,
35 char suffix, enum machine_mode);
38 struct convert_optab_libcall_d
40 const char *libcall_basename;
41 void (*libcall_gen) (convert_optab, const char *name,
42 enum machine_mode, enum machine_mode);
45 /* Given an enum insn_code, access the function to construct
46 the body of that kind of insn. */
47 #define GEN_FCN(CODE) (insn_data[CODE].genfun)
49 /* Contains the optab used for each rtx code, and vice-versa. */
50 extern const optab code_to_optab_[NUM_RTX_CODE];
51 extern const enum rtx_code optab_to_code_[NUM_OPTABS];
53 static inline optab
54 code_to_optab (enum rtx_code code)
56 return code_to_optab_[code];
59 static inline enum rtx_code
60 optab_to_code (optab op)
62 return optab_to_code_[op];
65 extern const struct convert_optab_libcall_d convlib_def[NUM_CONVLIB_OPTABS];
66 extern const struct optab_libcall_d normlib_def[NUM_NORMLIB_OPTABS];
68 /* Returns the active icode for the given (encoded) optab. */
69 extern enum insn_code raw_optab_handler (unsigned);
70 extern bool swap_optab_enable (optab, enum machine_mode, bool);
72 /* Target-dependent globals. */
73 struct target_optabs {
74 /* Patterns that are used by optabs that are enabled for this target. */
75 bool pat_enable[NUM_OPTAB_PATTERNS];
78 extern struct target_optabs default_target_optabs;
79 extern struct target_optabs *this_fn_optabs;
80 #if SWITCHABLE_TARGET
81 extern struct target_optabs *this_target_optabs;
82 #else
83 #define this_target_optabs (&default_target_optabs)
84 #endif
86 /* Define functions given in optabs.c. */
88 extern rtx expand_widen_pattern_expr (sepops ops, rtx op0, rtx op1, rtx wide_op,
89 rtx target, int unsignedp);
91 extern rtx expand_ternary_op (enum machine_mode mode, optab ternary_optab,
92 rtx op0, rtx op1, rtx op2, rtx target,
93 int unsignedp);
95 /* Expand a binary operation given optab and rtx operands. */
96 extern rtx expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
97 enum optab_methods);
99 extern rtx simplify_expand_binop (enum machine_mode mode, optab binoptab,
100 rtx op0, rtx op1, rtx target, int unsignedp,
101 enum optab_methods methods);
103 extern bool force_expand_binop (enum machine_mode, optab, rtx, rtx, rtx, int,
104 enum optab_methods);
106 /* Expand a binary operation with both signed and unsigned forms. */
107 extern rtx sign_expand_binop (enum machine_mode, optab, optab, rtx, rtx,
108 rtx, int, enum optab_methods);
110 /* Generate code to perform an operation on one operand with two results. */
111 extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
113 /* Generate code to perform an operation on two operands with two results. */
114 extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
116 /* Generate code to perform an operation on two operands with two
117 results, using a library function. */
118 extern bool expand_twoval_binop_libfunc (optab, rtx, rtx, rtx, rtx,
119 enum rtx_code);
121 /* Expand a unary arithmetic operation given optab rtx operand. */
122 extern rtx expand_unop (enum machine_mode, optab, rtx, rtx, int);
124 /* Expand the absolute value operation. */
125 extern rtx expand_abs_nojump (enum machine_mode, rtx, rtx, int);
126 extern rtx expand_abs (enum machine_mode, rtx, rtx, int, int);
128 /* Expand the one's complement absolute value operation. */
129 extern rtx expand_one_cmpl_abs_nojump (enum machine_mode, rtx, rtx);
131 /* Expand the copysign operation. */
132 extern rtx expand_copysign (rtx, rtx, rtx);
134 /* Generate an instruction with a given INSN_CODE with an output and
135 an input. */
136 extern void emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
137 extern bool maybe_emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
139 /* Find a widening optab even if it doesn't widen as much as we want. */
140 #define find_widening_optab_handler(A,B,C,D) \
141 find_widening_optab_handler_and_mode (A, B, C, D, NULL)
142 extern enum insn_code find_widening_optab_handler_and_mode (optab,
143 enum machine_mode,
144 enum machine_mode,
145 int,
146 enum machine_mode *);
148 /* An extra flag to control optab_for_tree_code's behavior. This is needed to
149 distinguish between machines with a vector shift that takes a scalar for the
150 shift amount vs. machines that take a vector for the shift amount. */
151 enum optab_subtype
153 optab_default,
154 optab_scalar,
155 optab_vector
158 /* Return the optab used for computing the given operation on the type given by
159 the second argument. The third argument distinguishes between the types of
160 vector shifts and rotates */
161 extern optab optab_for_tree_code (enum tree_code, const_tree, enum optab_subtype);
163 /* The various uses that a comparison can have; used by can_compare_p:
164 jumps, conditional moves, store flag operations. */
165 enum can_compare_purpose
167 ccp_jump,
168 ccp_cmov,
169 ccp_store_flag
172 /* Nonzero if a compare of mode MODE can be done straightforwardly
173 (without splitting it into pieces). */
174 extern int can_compare_p (enum rtx_code, enum machine_mode,
175 enum can_compare_purpose);
177 /* Return the INSN_CODE to use for an extend operation. */
178 extern enum insn_code can_extend_p (enum machine_mode, enum machine_mode, int);
180 /* Generate the body of an insn to extend Y (with mode MFROM)
181 into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
182 extern rtx gen_extend_insn (rtx, rtx, enum machine_mode,
183 enum machine_mode, int);
185 /* Call this to reset the function entry for one optab. */
186 extern void set_optab_libfunc (optab, enum machine_mode, const char *);
187 extern void set_conv_libfunc (convert_optab, enum machine_mode,
188 enum machine_mode, const char *);
190 /* Call this to install all of the __sync libcalls up to size MAX. */
191 extern void init_sync_libfuncs (int max);
193 /* Generate code for a FIXED_CONVERT_EXPR. */
194 extern void expand_fixed_convert (rtx, rtx, int, int);
196 /* Generate code for a FLOAT_EXPR. */
197 extern void expand_float (rtx, rtx, int);
199 /* Return the insn_code for a FLOAT_EXPR. */
200 enum insn_code can_float_p (enum machine_mode, enum machine_mode, int);
202 /* Return true if there is an inline compare and swap pattern. */
203 extern bool can_compare_and_swap_p (enum machine_mode, bool);
205 /* Return true if there is an inline atomic exchange pattern. */
206 extern bool can_atomic_exchange_p (enum machine_mode, bool);
208 /* Generate code for a compare and swap. */
209 extern bool expand_atomic_compare_and_swap (rtx *, rtx *, rtx, rtx, rtx, bool,
210 enum memmodel, enum memmodel);
212 /* Generate memory barriers. */
213 extern void expand_mem_thread_fence (enum memmodel);
214 extern void expand_mem_signal_fence (enum memmodel);
216 /* Check whether an operation represented by the code CODE is a
217 convert operation that is supported by the target platform in
218 vector form */
219 bool supportable_convert_operation (enum tree_code, tree, tree, tree *,
220 enum tree_code *);
222 /* Generate code for a FIX_EXPR. */
223 extern void expand_fix (rtx, rtx, int);
225 /* Generate code for float to integral conversion. */
226 extern bool expand_sfix_optab (rtx, rtx, convert_optab);
228 /* Generate code for a widening multiply. */
229 extern rtx expand_widening_mult (enum machine_mode, rtx, rtx, rtx, int, optab);
231 /* Return tree if target supports vector operations for COND_EXPR. */
232 bool expand_vec_cond_expr_p (tree, tree);
234 /* Generate code for VEC_COND_EXPR. */
235 extern rtx expand_vec_cond_expr (tree, tree, tree, tree, rtx);
236 /* Generate code for VEC_LSHIFT_EXPR and VEC_RSHIFT_EXPR. */
237 extern rtx expand_vec_shift_expr (sepops, rtx);
239 /* Return tree if target supports vector operations for VEC_PERM_EXPR. */
240 extern bool can_vec_perm_p (enum machine_mode, bool, const unsigned char *);
242 /* Generate code for VEC_PERM_EXPR. */
243 extern rtx expand_vec_perm (enum machine_mode, rtx, rtx, rtx, rtx);
245 /* Return non-zero if target supports a given highpart multiplication. */
246 extern int can_mult_highpart_p (enum machine_mode, bool);
248 /* Generate code for MULT_HIGHPART_EXPR. */
249 extern rtx expand_mult_highpart (enum machine_mode, rtx, rtx, rtx, bool);
251 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
252 if the target does not have such an insn. */
254 static inline enum insn_code
255 optab_handler (optab op, enum machine_mode mode)
257 unsigned scode = (op << 16) | mode;
258 gcc_assert (op > LAST_CONV_OPTAB);
259 return raw_optab_handler (scode);
262 /* Return the insn used to perform conversion OP from mode FROM_MODE
263 to mode TO_MODE; return CODE_FOR_nothing if the target does not have
264 such an insn. */
266 static inline enum insn_code
267 convert_optab_handler (convert_optab op, enum machine_mode to_mode,
268 enum machine_mode from_mode)
270 unsigned scode = (op << 16) | (from_mode << 8) | to_mode;
271 gcc_assert (op > unknown_optab && op <= LAST_CONV_OPTAB);
272 return raw_optab_handler (scode);
275 /* Like optab_handler, but for widening_operations that have a
276 TO_MODE and a FROM_MODE. */
278 static inline enum insn_code
279 widening_optab_handler (optab op, enum machine_mode to_mode,
280 enum machine_mode from_mode)
282 unsigned scode = (op << 16) | to_mode;
283 if (to_mode != from_mode && from_mode != VOIDmode)
285 /* ??? Why does find_widening_optab_handler_and_mode attempt to
286 widen things that can't be widened? E.g. add_optab... */
287 if (op > LAST_CONV_OPTAB)
288 return CODE_FOR_nothing;
289 scode |= from_mode << 8;
291 return raw_optab_handler (scode);
294 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
295 if the target does not have such an insn. */
297 static inline enum insn_code
298 direct_optab_handler (direct_optab op, enum machine_mode mode)
300 return optab_handler (op, mode);
303 /* Return true if UNOPTAB is for a trapping-on-overflow operation. */
305 static inline bool
306 trapv_unoptab_p (optab unoptab)
308 return (unoptab == negv_optab
309 || unoptab == absv_optab);
312 /* Return true if BINOPTAB is for a trapping-on-overflow operation. */
314 static inline bool
315 trapv_binoptab_p (optab binoptab)
317 return (binoptab == addv_optab
318 || binoptab == subv_optab
319 || binoptab == smulv_optab);
322 extern rtx optab_libfunc (optab optab, enum machine_mode mode);
323 extern rtx convert_optab_libfunc (convert_optab optab, enum machine_mode mode1,
324 enum machine_mode mode2);
326 /* Describes an instruction that inserts or extracts a bitfield. */
327 struct extraction_insn
329 /* The code of the instruction. */
330 enum insn_code icode;
332 /* The mode that the structure operand should have. This is byte_mode
333 when using the legacy insv, extv and extzv patterns to access memory. */
334 enum machine_mode struct_mode;
336 /* The mode of the field to be inserted or extracted, and by extension
337 the mode of the insertion or extraction itself. */
338 enum machine_mode field_mode;
340 /* The mode of the field's bit position. This is only important
341 when the position is variable rather than constant. */
342 enum machine_mode pos_mode;
345 /* Enumerates the possible extraction_insn operations. */
346 enum extraction_pattern { EP_insv, EP_extv, EP_extzv };
348 extern bool get_best_reg_extraction_insn (extraction_insn *,
349 enum extraction_pattern,
350 unsigned HOST_WIDE_INT,
351 enum machine_mode);
353 extern bool get_best_mem_extraction_insn (extraction_insn *,
354 enum extraction_pattern,
355 HOST_WIDE_INT, HOST_WIDE_INT,
356 enum machine_mode);
358 extern bool insn_operand_matches (enum insn_code icode, unsigned int opno,
359 rtx operand);
361 /* Describes the type of an expand_operand. Each value is associated
362 with a create_*_operand function; see the comments above those
363 functions for details. */
364 enum expand_operand_type {
365 EXPAND_FIXED,
366 EXPAND_OUTPUT,
367 EXPAND_INPUT,
368 EXPAND_CONVERT_TO,
369 EXPAND_CONVERT_FROM,
370 EXPAND_ADDRESS,
371 EXPAND_INTEGER
374 /* Information about an operand for instruction expansion. */
375 struct expand_operand {
376 /* The type of operand. */
377 ENUM_BITFIELD (expand_operand_type) type : 8;
379 /* True if any conversion should treat VALUE as being unsigned
380 rather than signed. Only meaningful for certain types. */
381 unsigned int unsigned_p : 1;
383 /* Unused; available for future use. */
384 unsigned int unused : 7;
386 /* The mode passed to the convert_*_operand function. It has a
387 type-dependent meaning. */
388 ENUM_BITFIELD (machine_mode) mode : 16;
390 /* The value of the operand. */
391 rtx value;
394 /* Initialize OP with the given fields. Initialise the other fields
395 to their default values. */
397 static inline void
398 create_expand_operand (struct expand_operand *op,
399 enum expand_operand_type type,
400 rtx value, enum machine_mode mode,
401 bool unsigned_p)
403 op->type = type;
404 op->unsigned_p = unsigned_p;
405 op->unused = 0;
406 op->mode = mode;
407 op->value = value;
410 /* Make OP describe an operand that must use rtx X, even if X is volatile. */
412 static inline void
413 create_fixed_operand (struct expand_operand *op, rtx x)
415 create_expand_operand (op, EXPAND_FIXED, x, VOIDmode, false);
418 /* Make OP describe an output operand that must have mode MODE.
419 X, if nonnull, is a suggestion for where the output should be stored.
420 It is OK for VALUE to be inconsistent with MODE, although it will just
421 be ignored in that case. */
423 static inline void
424 create_output_operand (struct expand_operand *op, rtx x,
425 enum machine_mode mode)
427 create_expand_operand (op, EXPAND_OUTPUT, x, mode, false);
430 /* Make OP describe an input operand that must have mode MODE and
431 value VALUE; MODE cannot be VOIDmode. The backend may request that
432 VALUE be copied into a different kind of rtx before being passed
433 as an operand. */
435 static inline void
436 create_input_operand (struct expand_operand *op, rtx value,
437 enum machine_mode mode)
439 create_expand_operand (op, EXPAND_INPUT, value, mode, false);
442 /* Like create_input_operand, except that VALUE must first be converted
443 to mode MODE. UNSIGNED_P says whether VALUE is unsigned. */
445 static inline void
446 create_convert_operand_to (struct expand_operand *op, rtx value,
447 enum machine_mode mode, bool unsigned_p)
449 create_expand_operand (op, EXPAND_CONVERT_TO, value, mode, unsigned_p);
452 /* Make OP describe an input operand that should have the same value
453 as VALUE, after any mode conversion that the backend might request.
454 If VALUE is a CONST_INT, it should be treated as having mode MODE.
455 UNSIGNED_P says whether VALUE is unsigned. */
457 static inline void
458 create_convert_operand_from (struct expand_operand *op, rtx value,
459 enum machine_mode mode, bool unsigned_p)
461 create_expand_operand (op, EXPAND_CONVERT_FROM, value, mode, unsigned_p);
464 extern void create_convert_operand_from_type (struct expand_operand *op,
465 rtx value, tree type);
467 /* Make OP describe an input Pmode address operand. VALUE is the value
468 of the address, but it may need to be converted to Pmode first. */
470 static inline void
471 create_address_operand (struct expand_operand *op, rtx value)
473 create_expand_operand (op, EXPAND_ADDRESS, value, Pmode, false);
476 /* Make OP describe an input operand that has value INTVAL and that has
477 no inherent mode. This function should only be used for operands that
478 are always expand-time constants. The backend may request that INTVAL
479 be copied into a different kind of rtx, but it must specify the mode
480 of that rtx if so. */
482 static inline void
483 create_integer_operand (struct expand_operand *op, HOST_WIDE_INT intval)
485 create_expand_operand (op, EXPAND_INTEGER, GEN_INT (intval), VOIDmode, false);
488 extern bool valid_multiword_target_p (rtx);
490 extern bool maybe_legitimize_operands (enum insn_code icode,
491 unsigned int opno, unsigned int nops,
492 struct expand_operand *ops);
493 extern rtx maybe_gen_insn (enum insn_code icode, unsigned int nops,
494 struct expand_operand *ops);
495 extern bool maybe_expand_insn (enum insn_code icode, unsigned int nops,
496 struct expand_operand *ops);
497 extern bool maybe_expand_jump_insn (enum insn_code icode, unsigned int nops,
498 struct expand_operand *ops);
499 extern void expand_insn (enum insn_code icode, unsigned int nops,
500 struct expand_operand *ops);
501 extern void expand_jump_insn (enum insn_code icode, unsigned int nops,
502 struct expand_operand *ops);
504 extern rtx prepare_operand (enum insn_code, rtx, int, enum machine_mode,
505 enum machine_mode, int);
507 extern void gen_int_libfunc (optab, const char *, char, enum machine_mode);
508 extern void gen_fp_libfunc (optab, const char *, char, enum machine_mode);
509 extern void gen_fixed_libfunc (optab, const char *, char, enum machine_mode);
510 extern void gen_signed_fixed_libfunc (optab, const char *, char,
511 enum machine_mode);
512 extern void gen_unsigned_fixed_libfunc (optab, const char *, char,
513 enum machine_mode);
514 extern void gen_int_fp_libfunc (optab, const char *, char, enum machine_mode);
515 extern void gen_intv_fp_libfunc (optab, const char *, char, enum machine_mode);
516 extern void gen_int_fp_fixed_libfunc (optab, const char *, char,
517 enum machine_mode);
518 extern void gen_int_fp_signed_fixed_libfunc (optab, const char *, char,
519 enum machine_mode);
520 extern void gen_int_fixed_libfunc (optab, const char *, char,
521 enum machine_mode);
522 extern void gen_int_signed_fixed_libfunc (optab, const char *, char,
523 enum machine_mode);
524 extern void gen_int_unsigned_fixed_libfunc (optab, const char *, char,
525 enum machine_mode);
527 extern void gen_interclass_conv_libfunc (convert_optab, const char *,
528 enum machine_mode, enum machine_mode);
529 extern void gen_int_to_fp_conv_libfunc (convert_optab, const char *,
530 enum machine_mode, enum machine_mode);
531 extern void gen_ufloat_conv_libfunc (convert_optab, const char *,
532 enum machine_mode, enum machine_mode);
533 extern void gen_int_to_fp_nondecimal_conv_libfunc (convert_optab,
534 const char *,
535 enum machine_mode,
536 enum machine_mode);
537 extern void gen_fp_to_int_conv_libfunc (convert_optab, const char *,
538 enum machine_mode, enum machine_mode);
539 extern void gen_intraclass_conv_libfunc (convert_optab, const char *,
540 enum machine_mode, enum machine_mode);
541 extern void gen_trunc_conv_libfunc (convert_optab, const char *,
542 enum machine_mode, enum machine_mode);
543 extern void gen_extend_conv_libfunc (convert_optab, const char *,
544 enum machine_mode, enum machine_mode);
545 extern void gen_fract_conv_libfunc (convert_optab, const char *,
546 enum machine_mode, enum machine_mode);
547 extern void gen_fractuns_conv_libfunc (convert_optab, const char *,
548 enum machine_mode, enum machine_mode);
549 extern void gen_satfract_conv_libfunc (convert_optab, const char *,
550 enum machine_mode, enum machine_mode);
551 extern void gen_satfractuns_conv_libfunc (convert_optab, const char *,
552 enum machine_mode,
553 enum machine_mode);
555 #endif /* GCC_OPTABS_H */