1 /* Definitions for code generation pass of GNU compiler.
2 Copyright (C) 2001-2018 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 struct expand_operand {
45 /* The type of operand. */
46 ENUM_BITFIELD (expand_operand_type) type : 8;
47
48 /* True if any conversion should treat VALUE as being unsigned
49 rather than signed. Only meaningful for certain types. */
50 unsigned int unsigned_p : 1;
51
52 /* Is the target operand. */
53 unsigned int target : 1;
54
55 /* Unused; available for future use. */
56 unsigned int unused : 6;
57
58 /* The mode passed to the convert_*_operand function. It has a
59 type-dependent meaning. */
60 ENUM_BITFIELD (machine_mode) mode : 16;
61
62 /* The value of the operand. */
63 rtx value;
64
65 /* The value of an EXPAND_INTEGER operand. */
66 poly_int64 int_value;
67 };
68
69 /* Initialize OP with the given fields. Initialise the other fields
70 to their default values. */
71
72 static inline void
73 create_expand_operand (struct expand_operand *op,
74 enum expand_operand_type type,
75 rtx value, machine_mode mode,
76 bool unsigned_p, poly_int64 int_value = 0)
77 {
78 op->type = type;
79 op->unsigned_p = unsigned_p;
80 op->unused = 0;
81 op->mode = mode;
82 op->value = value;
83 op->int_value = int_value;
84 }
85
86 /* Make OP describe an operand that must use rtx X, even if X is volatile. */
87
88 static inline void
create_fixed_operand(struct expand_operand * op,rtx x)89 create_fixed_operand (struct expand_operand *op, rtx x)
90 {
91 create_expand_operand (op, EXPAND_FIXED, x, VOIDmode, false);
92 }
93
94 /* Make OP describe an output operand that must have mode MODE.
95 X, if nonnull, is a suggestion for where the output should be stored.
96 It is OK for VALUE to be inconsistent with MODE, although it will just
97 be ignored in that case. */
98
99 static inline void
create_output_operand(struct expand_operand * op,rtx x,machine_mode mode)100 create_output_operand (struct expand_operand *op, rtx x,
101 machine_mode mode)
102 {
103 create_expand_operand (op, EXPAND_OUTPUT, x, mode, false);
104 }
105
106 /* Make OP describe an input operand that must have mode MODE and
107 value VALUE; MODE cannot be VOIDmode. The backend may request that
108 VALUE be copied into a different kind of rtx before being passed
109 as an operand. */
110
111 static inline void
create_input_operand(struct expand_operand * op,rtx value,machine_mode mode)112 create_input_operand (struct expand_operand *op, rtx value,
113 machine_mode mode)
114 {
115 create_expand_operand (op, EXPAND_INPUT, value, mode, false);
116 }
117
118 /* Like create_input_operand, except that VALUE must first be converted
119 to mode MODE. UNSIGNED_P says whether VALUE is unsigned. */
120
121 static inline void
create_convert_operand_to(struct expand_operand * op,rtx value,machine_mode mode,bool unsigned_p)122 create_convert_operand_to (struct expand_operand *op, rtx value,
123 machine_mode mode, bool unsigned_p)
124 {
125 create_expand_operand (op, EXPAND_CONVERT_TO, value, mode, unsigned_p);
126 }
127
128 /* Make OP describe an input operand that should have the same value
129 as VALUE, after any mode conversion that the backend might request.
130 If VALUE is a CONST_INT, it should be treated as having mode MODE.
131 UNSIGNED_P says whether VALUE is unsigned. */
132
133 static inline void
create_convert_operand_from(struct expand_operand * op,rtx value,machine_mode mode,bool unsigned_p)134 create_convert_operand_from (struct expand_operand *op, rtx value,
135 machine_mode mode, bool unsigned_p)
136 {
137 create_expand_operand (op, EXPAND_CONVERT_FROM, value, mode, unsigned_p);
138 }
139
140
141 /* Make OP describe an input Pmode address operand. VALUE is the value
142 of the address, but it may need to be converted to Pmode first. */
143
144 static inline void
create_address_operand(struct expand_operand * op,rtx value)145 create_address_operand (struct expand_operand *op, rtx value)
146 {
147 create_expand_operand (op, EXPAND_ADDRESS, value, Pmode, false);
148 }
149
150 extern void create_integer_operand (struct expand_operand *, poly_int64);
151
152 /* Passed to expand_simple_binop and expand_binop to say which options
153 to try to use if the requested operation can't be open-coded on the
154 requisite mode. Either OPTAB_LIB or OPTAB_LIB_WIDEN says try using
155 a library call. Either OPTAB_WIDEN or OPTAB_LIB_WIDEN says try
156 using a wider mode. OPTAB_MUST_WIDEN says try widening and don't
157 try anything else. */
158
159 enum optab_methods
160 {
161 OPTAB_DIRECT,
162 OPTAB_LIB,
163 OPTAB_WIDEN,
164 OPTAB_LIB_WIDEN,
165 OPTAB_MUST_WIDEN
166 };
167
168 extern rtx expand_widen_pattern_expr (struct separate_ops *, rtx , rtx , rtx,
169 rtx, int);
170 extern rtx expand_ternary_op (machine_mode mode, optab ternary_optab,
171 rtx op0, rtx op1, rtx op2, rtx target,
172 int unsignedp);
173 extern rtx simplify_expand_binop (machine_mode mode, optab binoptab,
174 rtx op0, rtx op1, rtx target, int unsignedp,
175 enum optab_methods methods);
176 extern bool force_expand_binop (machine_mode, optab, rtx, rtx, rtx, int,
177 enum optab_methods);
178 extern rtx expand_vector_broadcast (machine_mode, rtx);
179
180 /* Generate code for a simple binary or unary operation. "Simple" in
181 this case means "can be unambiguously described by a (mode, code)
182 pair and mapped to a single optab." */
183 extern rtx expand_simple_binop (machine_mode, enum rtx_code, rtx,
184 rtx, rtx, int, enum optab_methods);
185
186 /* Expand a binary operation given optab and rtx operands. */
187 extern rtx expand_binop (machine_mode, optab, rtx, rtx, rtx, int,
188 enum optab_methods);
189
190 /* Expand a binary operation with both signed and unsigned forms. */
191 extern rtx sign_expand_binop (machine_mode, optab, optab, rtx, rtx,
192 rtx, int, enum optab_methods);
193
194 /* Generate code to perform an operation on one operand with two results. */
195 extern int expand_twoval_unop (optab, rtx, rtx, rtx, int);
196
197 /* Generate code to perform an operation on two operands with two results. */
198 extern int expand_twoval_binop (optab, rtx, rtx, rtx, rtx, int);
199
200 /* Generate code to perform an operation on two operands with two
201 results, using a library function. */
202 extern bool expand_twoval_binop_libfunc (optab, rtx, rtx, rtx, rtx,
203 enum rtx_code);
204 extern rtx expand_simple_unop (machine_mode, enum rtx_code, rtx, rtx,
205 int);
206
207 /* Expand a unary arithmetic operation given optab rtx operand. */
208 extern rtx expand_unop (machine_mode, optab, rtx, rtx, int);
209
210 /* Expand the absolute value operation. */
211 extern rtx expand_abs_nojump (machine_mode, rtx, rtx, int);
212 extern rtx expand_abs (machine_mode, rtx, rtx, int, int);
213
214 /* Expand the one's complement absolute value operation. */
215 extern rtx expand_one_cmpl_abs_nojump (machine_mode, rtx, rtx);
216
217 /* Expand the copysign operation. */
218 extern rtx expand_copysign (rtx, rtx, rtx);
219 /* Generate an instruction with a given INSN_CODE with an output and
220 an input. */
221 extern bool maybe_emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
222 extern void emit_unop_insn (enum insn_code, rtx, rtx, enum rtx_code);
223
224 /* Emit code to make a call to a constant function or a library call. */
225 extern void emit_libcall_block (rtx_insn *, rtx, rtx, rtx);
226
227 /* The various uses that a comparison can have; used by can_compare_p:
228 jumps, conditional moves, store flag operations. */
229 enum can_compare_purpose
230 {
231 ccp_jump,
232 ccp_cmov,
233 ccp_store_flag
234 };
235
236 /* Nonzero if a compare of mode MODE can be done straightforwardly
237 (without splitting it into pieces). */
238 extern int can_compare_p (enum rtx_code, machine_mode,
239 enum can_compare_purpose);
240 extern rtx prepare_operand (enum insn_code, rtx, int, machine_mode,
241 machine_mode, int);
242 /* Emit a pair of rtl insns to compare two rtx's and to jump
243 to a label if the comparison is true. */
244 extern void emit_cmp_and_jump_insns (rtx, rtx, enum rtx_code, rtx,
245 machine_mode, int, rtx,
246 profile_probability prob
247 = profile_probability::uninitialized ());
248
249 /* Generate code to indirectly jump to a location given in the rtx LOC. */
250 extern void emit_indirect_jump (rtx);
251
252 #include "insn-config.h"
253
254 #ifndef GCC_INSN_CONFIG_H
255 #error "insn-config.h must be included before optabs.h"
256 #endif
257
258 /* Emit a conditional move operation. */
259 rtx emit_conditional_move (rtx, enum rtx_code, rtx, rtx, machine_mode,
260 rtx, rtx, machine_mode, int);
261
262 /* Emit a conditional negate or bitwise complement operation. */
263 rtx emit_conditional_neg_or_complement (rtx, rtx_code, machine_mode, rtx,
264 rtx, rtx);
265
266 rtx emit_conditional_add (rtx, enum rtx_code, rtx, rtx, machine_mode,
267 rtx, rtx, machine_mode, int);
268
269 /* Create but don't emit one rtl instruction to perform certain operations.
270 Modes must match; operands must meet the operation's predicates.
271 Likewise for subtraction and for just copying. */
272 extern rtx_insn *gen_add2_insn (rtx, rtx);
273 extern rtx_insn *gen_add3_insn (rtx, rtx, rtx);
274 extern int have_add2_insn (rtx, rtx);
275 extern rtx_insn *gen_addptr3_insn (rtx, rtx, rtx);
276 extern int have_addptr3_insn (rtx, rtx, rtx);
277 extern rtx_insn *gen_sub2_insn (rtx, rtx);
278 extern rtx_insn *gen_sub3_insn (rtx, rtx, rtx);
279 extern int have_sub2_insn (rtx, rtx);
280
281 /* Generate the body of an insn to extend Y (with mode MFROM)
282 into X (with mode MTO). Do zero-extension if UNSIGNEDP is nonzero. */
283 extern rtx_insn *gen_extend_insn (rtx, rtx, machine_mode, machine_mode, int);
284
285 /* Generate code for a FLOAT_EXPR. */
286 extern void expand_float (rtx, rtx, int);
287
288 /* Generate code for a FIX_EXPR. */
289 extern void expand_fix (rtx, rtx, int);
290
291 /* Generate code for a FIXED_CONVERT_EXPR. */
292 extern void expand_fixed_convert (rtx, rtx, int, int);
293
294 /* Generate code for float to integral conversion. */
295 extern bool expand_sfix_optab (rtx, rtx, convert_optab);
296
297 /* Report whether the machine description contains an insn which can
298 perform the operation described by CODE and MODE. */
299 extern int have_insn_for (enum rtx_code, machine_mode);
300
301 /* Generate a conditional trap instruction. */
302 extern rtx_insn *gen_cond_trap (enum rtx_code, rtx, rtx, rtx);
303
304 /* Generate code for VEC_PERM_EXPR. */
305 extern rtx expand_vec_perm_var (machine_mode, rtx, rtx, rtx, rtx);
306 extern rtx expand_vec_perm_const (machine_mode, rtx, rtx,
307 const vec_perm_builder &, machine_mode, rtx);
308
309 /* Generate code for vector comparison. */
310 extern rtx expand_vec_cmp_expr (tree, tree, rtx);
311
312 /* Generate code for VEC_COND_EXPR. */
313 extern rtx expand_vec_cond_expr (tree, tree, tree, tree, rtx);
314
315 /* Generate code for VEC_SERIES_EXPR. */
316 extern rtx expand_vec_series_expr (machine_mode, rtx, rtx, rtx);
317
318 /* Generate code for MULT_HIGHPART_EXPR. */
319 extern rtx expand_mult_highpart (machine_mode, rtx, rtx, rtx, bool);
320
321 extern rtx expand_sync_lock_test_and_set (rtx, rtx, rtx);
322 extern rtx expand_atomic_test_and_set (rtx, rtx, enum memmodel);
323 extern rtx expand_atomic_exchange (rtx, rtx, rtx, enum memmodel);
324 extern bool expand_atomic_compare_and_swap (rtx *, rtx *, rtx, rtx, rtx, bool,
325 enum memmodel, enum memmodel);
326 /* Generate memory barriers. */
327 extern void expand_mem_thread_fence (enum memmodel);
328 extern void expand_mem_signal_fence (enum memmodel);
329
330 rtx expand_atomic_load (rtx, rtx, enum memmodel);
331 rtx expand_atomic_store (rtx, rtx, enum memmodel, bool);
332 rtx expand_atomic_fetch_op (rtx, rtx, rtx, enum rtx_code, enum memmodel,
333 bool);
334
335 extern bool insn_operand_matches (enum insn_code icode, unsigned int opno,
336 rtx operand);
337 extern bool valid_multiword_target_p (rtx);
338 extern void create_convert_operand_from_type (struct expand_operand *op,
339 rtx value, tree type);
340 extern bool maybe_legitimize_operands (enum insn_code icode,
341 unsigned int opno, unsigned int nops,
342 struct expand_operand *ops);
343 extern rtx_insn *maybe_gen_insn (enum insn_code icode, unsigned int nops,
344 struct expand_operand *ops);
345 extern bool maybe_expand_insn (enum insn_code icode, unsigned int nops,
346 struct expand_operand *ops);
347 extern bool maybe_expand_jump_insn (enum insn_code icode, unsigned int nops,
348 struct expand_operand *ops);
349 extern void expand_insn (enum insn_code icode, unsigned int nops,
350 struct expand_operand *ops);
351 extern void expand_jump_insn (enum insn_code icode, unsigned int nops,
352 struct expand_operand *ops);
353
354 extern enum rtx_code get_rtx_code (enum tree_code tcode, bool unsignedp);
355
356 #endif /* GCC_OPTABS_H */
357