gcc/optabs-query.h

   1 /* IR-agnostic target query functions relating to optabs
   2    Copyright (C) 2001-2017 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_QUERY_H
  21 #define GCC_OPTABS_QUERY_H
  22
  23 #include "insn-opinit.h"
  24
  25 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
  26    if the target does not have such an insn.  */
  27
  28 inline enum insn_code
  29 optab_handler (optab op, machine_mode mode)
  30 {
  31   unsigned scode = (op << 16) | mode;
  32   gcc_assert (op > LAST_CONV_OPTAB);
  33   return raw_optab_handler (scode);
  34 }
  35
  36 /* Return the insn used to perform conversion OP from mode FROM_MODE
  37    to mode TO_MODE; return CODE_FOR_nothing if the target does not have
  38    such an insn.  */
  39
  40 inline enum insn_code
  41 convert_optab_handler (convert_optab op, machine_mode to_mode,
  42                        machine_mode from_mode)
  43 {
  44   unsigned scode = (op << 16) | (from_mode << 8) | to_mode;
  45   gcc_assert (op > unknown_optab && op <= LAST_CONV_OPTAB);
  46   return raw_optab_handler (scode);
  47 }
  48
  49 enum insn_code convert_optab_handler (convert_optab, machine_mode,
  50                                       machine_mode, optimization_type);
  51
  52 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
  53    if the target does not have such an insn.  */
  54
  55 inline enum insn_code
  56 direct_optab_handler (direct_optab op, machine_mode mode)
  57 {
  58   return optab_handler (op, mode);
  59 }
  60
  61 enum insn_code direct_optab_handler (convert_optab, machine_mode,
  62                                      optimization_type);
  63
  64 /* Return true if UNOPTAB is for a trapping-on-overflow operation.  */
  65
  66 inline bool
  67 trapv_unoptab_p (optab unoptab)
  68 {
  69   return (unoptab == negv_optab
  70           || unoptab == absv_optab);
  71 }
  72
  73 /* Return true if BINOPTAB is for a trapping-on-overflow operation.  */
  74
  75 inline bool
  76 trapv_binoptab_p (optab binoptab)
  77 {
  78   return (binoptab == addv_optab
  79           || binoptab == subv_optab
  80           || binoptab == smulv_optab);
  81 }
  82
  83 /* Return insn code for a comparison operator with VMODE
  84    resultin MASK_MODE, unsigned if UNS is true.  */
  85
  86 static inline enum insn_code
  87 get_vec_cmp_icode (machine_mode vmode, machine_mode mask_mode, bool uns)
  88 {
  89   optab tab = uns ? vec_cmpu_optab : vec_cmp_optab;
  90   return convert_optab_handler (tab, vmode, mask_mode);
  91 }
  92
  93 /* Return insn code for a comparison operator with VMODE
  94    resultin MASK_MODE (only for EQ/NE).  */
  95
  96 static inline enum insn_code
  97 get_vec_cmp_eq_icode (machine_mode vmode, machine_mode mask_mode)
  98 {
  99   return convert_optab_handler (vec_cmpeq_optab, vmode, mask_mode);
 100 }
 101
 102 /* Return insn code for a conditional operator with a comparison in
 103    mode CMODE, unsigned if UNS is true, resulting in a value of mode VMODE.  */
 104
 105 inline enum insn_code
 106 get_vcond_icode (machine_mode vmode, machine_mode cmode, bool uns)
 107 {
 108   enum insn_code icode = CODE_FOR_nothing;
 109   if (uns)
 110     icode = convert_optab_handler (vcondu_optab, vmode, cmode);
 111   else
 112     icode = convert_optab_handler (vcond_optab, vmode, cmode);
 113   return icode;
 114 }
 115
 116 /* Return insn code for a conditional operator with a mask mode
 117    MMODE resulting in a value of mode VMODE.  */
 118
 119 static inline enum insn_code
 120 get_vcond_mask_icode (machine_mode vmode, machine_mode mmode)
 121 {
 122   return convert_optab_handler (vcond_mask_optab, vmode, mmode);
 123 }
 124
 125 /* Return insn code for a conditional operator with a comparison in
 126    mode CMODE (only EQ/NE), resulting in a value of mode VMODE.  */
 127
 128 static inline enum insn_code
 129 get_vcond_eq_icode (machine_mode vmode, machine_mode cmode)
 130 {
 131   return convert_optab_handler (vcondeq_optab, vmode, cmode);
 132 }
 133
 134 /* Enumerates the possible extraction_insn operations.  */
 135 enum extraction_pattern { EP_insv, EP_extv, EP_extzv };
 136
 137 /* Describes an instruction that inserts or extracts a bitfield.  */
 138 struct extraction_insn
 139 {
 140   /* The code of the instruction.  */
 141   enum insn_code icode;
 142
 143   /* The mode that the structure operand should have.  This is byte_mode
 144      when using the legacy insv, extv and extzv patterns to access memory.  */
 145   machine_mode struct_mode;
 146
 147   /* The mode of the field to be inserted or extracted, and by extension
 148      the mode of the insertion or extraction itself.  */
 149   machine_mode field_mode;
 150
 151   /* The mode of the field's bit position.  This is only important
 152      when the position is variable rather than constant.  */
 153   machine_mode pos_mode;
 154 };
 155
 156 bool get_best_reg_extraction_insn (extraction_insn *,
 157                                    enum extraction_pattern,
 158                                    unsigned HOST_WIDE_INT, machine_mode);
 159 bool get_best_mem_extraction_insn (extraction_insn *,
 160                                    enum extraction_pattern,
 161                                    HOST_WIDE_INT, HOST_WIDE_INT, machine_mode);
 162
 163 enum insn_code can_extend_p (machine_mode, machine_mode, int);
 164 enum insn_code can_float_p (machine_mode, machine_mode, int);
 165 enum insn_code can_fix_p (machine_mode, machine_mode, int, bool *);
 166 bool can_conditionally_move_p (machine_mode mode);
 167 bool can_vec_perm_p (machine_mode, bool, const unsigned char *);
 168 enum insn_code widening_optab_handler (optab, machine_mode, machine_mode);
 169 /* Find a widening optab even if it doesn't widen as much as we want.  */
 170 #define find_widening_optab_handler(A,B,C,D) \
 171   find_widening_optab_handler_and_mode (A, B, C, D, NULL)
 172 enum insn_code find_widening_optab_handler_and_mode (optab, machine_mode,
 173                                                      machine_mode, int,
 174                                                      machine_mode *);
 175 int can_mult_highpart_p (machine_mode, bool);
 176 bool can_vec_mask_load_store_p (machine_mode, machine_mode, bool);
 177 bool can_compare_and_swap_p (machine_mode, bool);
 178 bool can_atomic_exchange_p (machine_mode, bool);
 179 bool can_atomic_load_p (machine_mode);
 180 bool lshift_cheap_p (bool);
 181
 182 #endif