1/* IR-agnostic target query functions relating to optabs
2 Copyright (C) 2001-2017 Free Software Foundation, Inc.
3
4This file is part of GCC.
5
6GCC is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 3, or (at your option)
9any later version.
10
11GCC is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with GCC; see the file COPYING3. If not see
18<http://www.gnu.org/licenses/>. */
19
20#ifndef GCC_OPTABS_QUERY_H
21#define GCC_OPTABS_QUERY_H
22
23#include "insn-opinit.h"
24#include "target.h"
25
26/* Return true if OP is a conversion optab. */
27
28inline bool
29convert_optab_p (optab op)
30{
31 return op > unknown_optab && op <= LAST_CONV_OPTAB;
32}
33
34/* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
35 if the target does not have such an insn. */
36
37inline enum insn_code
38optab_handler (optab op, machine_mode mode)
39{
40 unsigned scode = (op << 16) | mode;
41 gcc_assert (op > LAST_CONV_OPTAB);
42 return raw_optab_handler (scode);
43}
44
45/* Return the insn used to perform conversion OP from mode FROM_MODE
46 to mode TO_MODE; return CODE_FOR_nothing if the target does not have
47 such an insn. */
48
49inline enum insn_code
50convert_optab_handler (convert_optab op, machine_mode to_mode,
51 machine_mode from_mode)
52{
53 unsigned scode = (op << 16) | (from_mode << 8) | to_mode;
54 gcc_assert (convert_optab_p (op));
55 return raw_optab_handler (scode);
56}
57
58enum insn_code convert_optab_handler (convert_optab, machine_mode,
59 machine_mode, optimization_type);
60
61/* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
62 if the target does not have such an insn. */
63
64inline enum insn_code
65direct_optab_handler (direct_optab op, machine_mode mode)
66{
67 return optab_handler (op, mode);
68}
69
70enum insn_code direct_optab_handler (convert_optab, machine_mode,
71 optimization_type);
72
73/* Return true if UNOPTAB is for a trapping-on-overflow operation. */
74
75inline bool
76trapv_unoptab_p (optab unoptab)
77{
78 return (unoptab == negv_optab
79 || unoptab == absv_optab);
80}
81
82/* Return true if BINOPTAB is for a trapping-on-overflow operation. */
83
84inline bool
85trapv_binoptab_p (optab binoptab)
86{
87 return (binoptab == addv_optab
88 || binoptab == subv_optab
89 || binoptab == smulv_optab);
90}
91
92/* Return insn code for a comparison operator with VMODE
93 resultin MASK_MODE, unsigned if UNS is true. */
94
95static inline enum insn_code
96get_vec_cmp_icode (machine_mode vmode, machine_mode mask_mode, bool uns)
97{
98 optab tab = uns ? vec_cmpu_optab : vec_cmp_optab;
99 return convert_optab_handler (tab, vmode, mask_mode);
100}
101
102/* Return insn code for a comparison operator with VMODE
103 resultin MASK_MODE (only for EQ/NE). */
104
105static inline enum insn_code
106get_vec_cmp_eq_icode (machine_mode vmode, machine_mode mask_mode)
107{
108 return convert_optab_handler (vec_cmpeq_optab, vmode, mask_mode);
109}
110
111/* Return insn code for a conditional operator with a comparison in
112 mode CMODE, unsigned if UNS is true, resulting in a value of mode VMODE. */
113
114inline enum insn_code
115get_vcond_icode (machine_mode vmode, machine_mode cmode, bool uns)
116{
117 enum insn_code icode = CODE_FOR_nothing;
118 if (uns)
119 icode = convert_optab_handler (vcondu_optab, vmode, cmode);
120 else
121 icode = convert_optab_handler (vcond_optab, vmode, cmode);
122 return icode;
123}
124
125/* Return insn code for a conditional operator with a mask mode
126 MMODE resulting in a value of mode VMODE. */
127
128static inline enum insn_code
129get_vcond_mask_icode (machine_mode vmode, machine_mode mmode)
130{
131 return convert_optab_handler (vcond_mask_optab, vmode, mmode);
132}
133
134/* Return insn code for a conditional operator with a comparison in
135 mode CMODE (only EQ/NE), resulting in a value of mode VMODE. */
136
137static inline enum insn_code
138get_vcond_eq_icode (machine_mode vmode, machine_mode cmode)
139{
140 return convert_optab_handler (vcondeq_optab, vmode, cmode);
141}
142
143/* Enumerates the possible extraction_insn operations. */
144enum extraction_pattern { EP_insv, EP_extv, EP_extzv };
145
146/* Describes an instruction that inserts or extracts a bitfield. */
147struct extraction_insn
148{
149 /* The code of the instruction. */
150 enum insn_code icode;
151
152 /* The mode that the structure operand should have. This is byte_mode
153 when using the legacy insv, extv and extzv patterns to access memory.
154 If no mode is given, the structure is a BLKmode memory. */
155 opt_scalar_int_mode struct_mode;
156
157 /* The mode of the field to be inserted or extracted, and by extension
158 the mode of the insertion or extraction itself. */
159 scalar_int_mode field_mode;
160
161 /* The mode of the field's bit position. This is only important
162 when the position is variable rather than constant. */
163 scalar_int_mode pos_mode;
164};
165
166bool get_best_reg_extraction_insn (extraction_insn *,
167 enum extraction_pattern,
168 unsigned HOST_WIDE_INT, machine_mode);
169bool get_best_mem_extraction_insn (extraction_insn *,
170 enum extraction_pattern,
171 HOST_WIDE_INT, HOST_WIDE_INT, machine_mode);
172
173enum insn_code can_extend_p (machine_mode, machine_mode, int);
174enum insn_code can_float_p (machine_mode, machine_mode, int);
175enum insn_code can_fix_p (machine_mode, machine_mode, int, bool *);
176bool can_conditionally_move_p (machine_mode mode);
177bool can_vec_perm_p (machine_mode, bool, vec_perm_indices *);
178/* Find a widening optab even if it doesn't widen as much as we want. */
179#define find_widening_optab_handler(A, B, C) \
180 find_widening_optab_handler_and_mode (A, B, C, NULL)
181enum insn_code find_widening_optab_handler_and_mode (optab, machine_mode,
182 machine_mode,
183 machine_mode *);
184int can_mult_highpart_p (machine_mode, bool);
185bool can_vec_mask_load_store_p (machine_mode, machine_mode, bool);
186bool can_compare_and_swap_p (machine_mode, bool);
187bool can_atomic_exchange_p (machine_mode, bool);
188bool can_atomic_load_p (machine_mode);
189bool lshift_cheap_p (bool);
190
191/* Version of find_widening_optab_handler_and_mode that operates on
192 specific mode types. */
193
194template<typename T>
195inline enum insn_code
196find_widening_optab_handler_and_mode (optab op, const T &to_mode,
197 const T &from_mode, T *found_mode)
198{
199 machine_mode tmp;
200 enum insn_code icode = find_widening_optab_handler_and_mode
201 (op, machine_mode (to_mode), machine_mode (from_mode), &tmp);
202 if (icode != CODE_FOR_nothing && found_mode)
203 *found_mode = as_a <T> (tmp);
204 return icode;
205}
206
207#endif
208