1 /* Definitions for code generation pass of GNU compiler.
2 Copyright (C) 2001-2020 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 3, 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 COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
19
20 #ifndef GCC_OPTABS_H
21 #define GCC_OPTABS_H
22
23 #include "optabs-query.h"
24 #include "optabs-libfuncs.h"
25 #include "vec-perm-indices.h"
26
27 /* Generate code for a widening multiply. */
28 extern rtx expand_widening_mult (machine_mode, rtx, rtx, rtx, int, optab);
29
30 /* Describes the type of an expand_operand. Each value is associated
31 with a create_*_operand function; see the comments above those
32 functions for details. */
33 enum expand_operand_type {
34 EXPAND_FIXED,
35 EXPAND_OUTPUT,
36 EXPAND_INPUT,
37 EXPAND_CONVERT_TO,
38 EXPAND_CONVERT_FROM,
39 EXPAND_ADDRESS,
40 EXPAND_INTEGER
41 };
42
43 /* Information about an operand for instruction expansion. */
44 class expand_operand {
45 public:
46 /* The type of operand. */
47 ENUM_BITFIELD (expand_operand_type) type : 8;
48
49 /* True if any conversion should treat VALUE as being unsigned
50 rather than signed. Only meaningful for certain types. */
51 unsigned int unsigned_p : 1;
52
53 /* Is the target operand. */
54 unsigned int target : 1;
55
56 /* Unused; available for future use. */
57 unsigned int unused : 6;
58
59 /* The mode passed to the convert_*_operand function. It has a
60 type-dependent meaning. */
61 ENUM_BITFIELD (machine_mode) mode : 16;
62
63 /* The value of the operand. */
64 rtx value;
65
66 /* The value of an EXPAND_INTEGER operand. */
67 poly_int64 int_value;
68 };
69
70 /* Initialize OP with the given fields. Initialise the other fields
71 to their default values. */
72
73 static inline void
74 create_expand_operand (class expand_operand *op,
75 enum expand_operand_type type,
76 rtx value, machine_mode mode,
77 bool unsigned_p, poly_int64 int_value = 0)
78 {
79 op->type = type;
80 op->unsigned_p = unsigned_p;
81 op->target = 0;
82 op->unused = 0;
83 op->mode = mode;
84 op->value = value;
85 op->int_value = int_value;
86 }
87
88 /* Make OP describe an operand that must use rtx X, even if X is volatile. */
89
90 static inline void
create_fixed_operand(class expand_operand * op,rtx x)91 create_fixed_operand (class expand_operand *op, rtx x)
92 {
93 create_expand_operand (op, EXPAND_FIXED, x, VOIDmode, false);
94 }
95
96 /* Make OP describe an output operand that must have mode MODE.
97 X, if nonnull, is a suggestion for where the output should be stored.
98 It is OK for VALUE to be inconsistent with MODE, although it will just
99 be ignored in that case. */
100
101 static inline void
create_output_operand(class expand_operand * op,rtx x,machine_mode mode)102 create_output_operand (class expand_operand *op, rtx x,
103 machine_mode mode)
104 {
105 create_expand_operand (op, EXPAND_OUTPUT, x, mode, false);
106 }
107
108 /* Make OP describe an input operand that must have mode MODE and
109 value VALUE; MODE cannot be VOIDmode. The backend may request that
110 VALUE be copied into a different kind of rtx before being passed
111 as an operand. */
112
113 static inline void
create_input_operand(class expand_operand * op,rtx value,machine_mode mode)114 create_input_operand (class expand_operand *op, rtx value,
115 machine_mode mode)
116 {
117 create_expand_operand (op, EXPAND_INPUT, value, mode, false);
118 }
119
120 /* Like create_input_operand, except that VALUE must first be converted
121 to mode MODE. UNSIGNED_P says whether VALUE is unsigned. */
122
123 static inline void
create_convert_operand_to(class expand_operand * op,rtx value,machine_mode mode,bool unsigned_p)124 create_convert_operand_to (class expand_operand *op, rtx value,
125 machine_mode mode, bool unsigned_p)
126 {
127 create_expand_operand (op, EXPAND_CONVERT_TO, value, mode, unsigned_p);
128 }
129
130 /* Make OP describe an input operand that should have the same value
131 as VALUE, after any mode conversion that the backend might request.
132 If VALUE is a CONST_INT, it should be treated as having mode MODE.
133 UNSIGNED_P says whether VALUE is unsigned.
134
135 The conversion of VALUE can include a combination of numerical
136 conversion (as for convert_modes) and duplicating a scalar to fill
137 a vector (if VALUE is a scalar but the operand is a vector). */
138
139 static inline void
create_convert_operand_from(class expand_operand * op,rtx value,machine_mode mode,bool unsigned_p)140 create_convert_operand_from (class expand_operand *op, rtx value,
141 machine_mode mode, bool unsigned_p)
142 {
143 create_expand_operand (op, EXPAND_CONVERT_FROM, value, mode, unsigned_p);
144 }
145
146
147 /* Make OP describe an input Pmode address operand. VALUE is the value
148 of the address, but it may need to be converted to Pmode first. */
149
150 static inline void
create_address_operand(class expand_operand * op,rtx value)151 create_address_operand (class expand_operand *op, rtx value)
152 {
153 create_expand_operand (op, EXPAND_ADDRESS, value, Pmode, false);
154 }
155
156 extern void create_integer_operand (class expand_operand *, poly_int64);
157
158 /* Passed to expand_simple_binop and expand_binop to say which options
159 to try to use if the requested operation can't be open-coded on the
160 requisite mode. Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using
161 a library call. Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try
162 using a wider mode. OPTAB_MUST_WIDEN says try widening and don't
163 try anything else. */
164
165 enum optab_methods
166 {
167 OPTAB_DIRECT,
168 OPTAB_LIB,
169 OPTAB_WIDEN,
170 OPTAB_LIB_WIDEN,
171 OPTAB_MUST_WIDEN
172 };
173
174 extern rtx expand_widen_pattern_expr (struct separate_ops *, rtx , rtx , rtx,
175 rtx, int);
176 extern rtx expand_ternary_op (machine_mode mode, optab ternary_optab,
177 rtx op0, rtx op1, rtx op2, rtx target,
178 int unsignedp);
179 extern rtx simplify_expand_binop (machine_mode mode, optab binoptab,
180 rtx op0, rtx op1, rtx target, int unsignedp,
181 enum optab_methods methods);
182 extern bool force_expand_binop (machine_mode, optab, rtx, rtx, rtx, int,
183 enum optab_methods);
184 extern rtx expand_vector_broadcast (machine_mode, rtx);
185
186 /* Generate code for a simple binary or unary operation. "Simple" in
187 this case means "can be unambiguously described by a (mode, code)
188 pair and mapped to a single optab." */
189 extern rtx expand_simple_binop (machine_mode, enum rtx_code, rtx,
190 rtx, rtx, int, enum optab_methods);
191
192 /* Expand a binary operation given optab and rtx operands. */
193 extern rtx expand_binop (machine_mode, optab, rtx, rtx, rtx, int,
194 enum optab_methods);
195
196 /* Expand a binary operation with both signed and unsigned forms. */
197 extern rtx sign_expand_binop (machine_mode, optab, optab, rtx, rtx,
198 rtx, int, enum optab_methods);
199
200 /* Generate code to perform an operation on one operand with two results. */
201 extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
202
203 /* Generate code to perform an operation on two operands with two results. */
204 extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
205
206 /* Generate code to perform an operation on two operands with two
207 results, using a library function. */
208 extern bool expand_twoval_binop_libfunc (optab, rtx, rtx, rtx, rtx,
209 enum rtx_code);
210 extern rtx expand_simple_unop (machine_mode, enum rtx_code, rtx, rtx,
211 int);
212
213 /* Expand a unary arithmetic operation given optab rtx operand. */
214 extern rtx expand_unop (machine_mode, optab, rtx, rtx, int);
215
216 /* Expand the absolute value operation. */
217 extern rtx expand_abs_nojump (machine_mode, rtx, rtx, int);
218 extern rtx expand_abs (machine_mode, rtx, rtx, int, int);
219
220 /* Expand the one's complement absolute value operation. */
221 extern rtx expand_one_cmpl_abs_nojump (machine_mode, rtx, rtx);
222
223 /* Expand the copysign operation. */
224 extern rtx expand_copysign (rtx, rtx, rtx);
225 /* Generate an instruction with a given INSN_CODE with an output and
226 an input. */
227 extern bool maybe_emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
228 extern void emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
229
230 /* Emit code to make a call to a constant function or a library call. */
231 extern void emit_libcall_block (rtx_insn *, rtx, rtx, rtx);
232
233 /* The various uses that a comparison can have; used by can_compare_p:
234 jumps, conditional moves, store flag operations. */
235 enum can_compare_purpose
236 {
237 ccp_jump,
238 ccp_cmov,
239 ccp_store_flag
240 };
241
242 /* Nonzero if a compare of mode MODE can be done straightforwardly
243 (without splitting it into pieces). */
244 extern int can_compare_p (enum rtx_code, machine_mode,
245 enum can_compare_purpose);
246
247 /* Return whether the backend can emit a vector comparison for code CODE,
248 comparing operands of mode CMP_OP_MODE and producing a result with
249 VALUE_MODE. */
250 extern bool can_vcond_compare_p (enum rtx_code, machine_mode, machine_mode);
251
252 extern rtx prepare_operand (enum insn_code, rtx, int, machine_mode,
253 machine_mode, int);
254 /* Emit a pair of rtl insns to compare two rtx's and to jump
255 to a label if the comparison is true. */
256 extern void emit_cmp_and_jump_insns (rtx, rtx, enum rtx_code, rtx,
257 machine_mode, int, rtx,
258 profile_probability prob
259 = profile_probability::uninitialized ());
260
261 /* Generate code to indirectly jump to a location given in the rtx LOC. */
262 extern void emit_indirect_jump (rtx);
263
264 #include "insn-config.h"
265
266 #ifndef GCC_INSN_CONFIG_H
267 #error "insn-config.h must be included before optabs.h"
268 #endif
269
270 /* Emit a conditional move operation. */
271 rtx emit_conditional_move (rtx, enum rtx_code, rtx, rtx, machine_mode,
272 rtx, rtx, machine_mode, int);
273
274 /* Emit a conditional negate or bitwise complement operation. */
275 rtx emit_conditional_neg_or_complement (rtx, rtx_code, machine_mode, rtx,
276 rtx, rtx);
277
278 rtx emit_conditional_add (rtx, enum rtx_code, rtx, rtx, machine_mode,
279 rtx, rtx, machine_mode, int);
280
281 /* Create but don't emit one rtl instruction to perform certain operations.
282 Modes must match; operands must meet the operation's predicates.
283 Likewise for subtraction and for just copying. */
284 extern rtx_insn *gen_add2_insn (rtx, rtx);
285 extern rtx_insn *gen_add3_insn (rtx, rtx, rtx);
286 extern int have_add2_insn (rtx, rtx);
287 extern rtx_insn *gen_addptr3_insn (rtx, rtx, rtx);
288 extern int have_addptr3_insn (rtx, rtx, rtx);
289 extern rtx_insn *gen_sub2_insn (rtx, rtx);
290 extern rtx_insn *gen_sub3_insn (rtx, rtx, rtx);
291 extern int have_sub2_insn (rtx, rtx);
292
293 /* Generate the body of an insn to extend Y (with mode MFROM)
294 into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
295 extern rtx_insn *gen_extend_insn (rtx, rtx, machine_mode, machine_mode, int);
296
297 /* Generate code for a FLOAT_EXPR. */
298 extern void expand_float (rtx, rtx, int);
299
300 /* Generate code for a FIX_EXPR. */
301 extern void expand_fix (rtx, rtx, int);
302
303 /* Generate code for a FIXED_CONVERT_EXPR. */
304 extern void expand_fixed_convert (rtx, rtx, int, int);
305
306 /* Generate code for float to integral conversion. */
307 extern bool expand_sfix_optab (rtx, rtx, convert_optab);
308
309 /* Report whether the machine description contains an insn which can
310 perform the operation described by CODE and MODE. */
311 extern int have_insn_for (enum rtx_code, machine_mode);
312
313 /* Generate a conditional trap instruction. */
314 extern rtx_insn *gen_cond_trap (enum rtx_code, rtx, rtx, rtx);
315
316 /* Generate code for VEC_PERM_EXPR. */
317 extern rtx expand_vec_perm_var (machine_mode, rtx, rtx, rtx, rtx);
318 extern rtx expand_vec_perm_const (machine_mode, rtx, rtx,
319 const vec_perm_builder &, machine_mode, rtx);
320
321 /* Generate code for vector comparison. */
322 extern rtx expand_vec_cmp_expr (tree, tree, rtx);
323
324 /* Generate code for VEC_COND_EXPR. */
325 extern rtx expand_vec_cond_expr (tree, tree, tree, tree, rtx);
326
327 /* Generate code for VEC_SERIES_EXPR. */
328 extern rtx expand_vec_series_expr (machine_mode, rtx, rtx, rtx);
329
330 /* Generate code for MULT_HIGHPART_EXPR. */
331 extern rtx expand_mult_highpart (machine_mode, rtx, rtx, rtx, bool);
332
333 extern rtx expand_sync_lock_test_and_set (rtx, rtx, rtx);
334 extern rtx expand_atomic_test_and_set (rtx, rtx, enum memmodel);
335 extern rtx expand_atomic_exchange (rtx, rtx, rtx, enum memmodel);
336 extern bool expand_atomic_compare_and_swap (rtx *, rtx *, rtx, rtx, rtx, bool,
337 enum memmodel, enum memmodel);
338 /* Generate memory barriers. */
339 extern void expand_mem_thread_fence (enum memmodel);
340 extern void expand_mem_signal_fence (enum memmodel);
341
342 rtx expand_atomic_load (rtx, rtx, enum memmodel);
343 rtx expand_atomic_store (rtx, rtx, enum memmodel, bool);
344 rtx expand_atomic_fetch_op (rtx, rtx, rtx, enum rtx_code, enum memmodel,
345 bool);
346
347 extern bool insn_operand_matches (enum insn_code icode, unsigned int opno,
348 rtx operand);
349 extern bool valid_multiword_target_p (rtx);
350 extern void create_convert_operand_from_type (class expand_operand *op,
351 rtx value, tree type);
352 extern bool maybe_legitimize_operands (enum insn_code icode,
353 unsigned int opno, unsigned int nops,
354 class expand_operand *ops);
355 extern rtx_insn *maybe_gen_insn (enum insn_code icode, unsigned int nops,
356 class expand_operand *ops);
357 extern bool maybe_expand_insn (enum insn_code icode, unsigned int nops,
358 class expand_operand *ops);
359 extern bool maybe_expand_jump_insn (enum insn_code icode, unsigned int nops,
360 class expand_operand *ops);
361 extern void expand_insn (enum insn_code icode, unsigned int nops,
362 class expand_operand *ops);
363 extern void expand_jump_insn (enum insn_code icode, unsigned int nops,
364 class expand_operand *ops);
365
366 extern enum rtx_code get_rtx_code (enum tree_code tcode, bool unsignedp);
367
368 #endif /* GCC_OPTABS_H */
369