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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 | |
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 | |
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 | |
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 | |
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 | |
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 | |
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 */ |