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111
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1 /* IR-agnostic target query functions relating to optabs
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131
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2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with GCC; see the file COPYING3. If not see
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18 <http://www.gnu.org/licenses/>. */
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19
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20 #ifndef GCC_OPTABS_QUERY_H
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21 #define GCC_OPTABS_QUERY_H
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22
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23 #include "insn-opinit.h"
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24 #include "target.h"
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25
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131
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26 /* Return true if OP is a conversion optab. */
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27
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28 inline bool
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29 convert_optab_p (optab op)
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30 {
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31 return op > unknown_optab && op <= LAST_CONV_OPTAB;
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32 }
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33
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111
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34 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
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35 if the target does not have such an insn. */
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36
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37 inline enum insn_code
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38 optab_handler (optab op, machine_mode mode)
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39 {
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40 unsigned scode = (op << 16) | mode;
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41 gcc_assert (op > LAST_CONV_OPTAB);
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42 return raw_optab_handler (scode);
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43 }
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44
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45 /* Return the insn used to perform conversion OP from mode FROM_MODE
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46 to mode TO_MODE; return CODE_FOR_nothing if the target does not have
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47 such an insn. */
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48
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49 inline enum insn_code
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50 convert_optab_handler (convert_optab op, machine_mode to_mode,
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51 machine_mode from_mode)
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52 {
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53 unsigned scode = (op << 16) | (from_mode << 8) | to_mode;
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54 gcc_assert (convert_optab_p (op));
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55 return raw_optab_handler (scode);
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56 }
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57
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58 enum insn_code convert_optab_handler (convert_optab, machine_mode,
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59 machine_mode, optimization_type);
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60
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61 /* Return the insn used to implement mode MODE of OP, or CODE_FOR_nothing
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62 if the target does not have such an insn. */
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63
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64 inline enum insn_code
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65 direct_optab_handler (direct_optab op, machine_mode mode)
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66 {
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67 return optab_handler (op, mode);
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68 }
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69
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70 enum insn_code direct_optab_handler (convert_optab, machine_mode,
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71 optimization_type);
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72
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73 /* Return true if UNOPTAB is for a trapping-on-overflow operation. */
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74
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75 inline bool
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76 trapv_unoptab_p (optab unoptab)
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77 {
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78 return (unoptab == negv_optab
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79 || unoptab == absv_optab);
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80 }
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81
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82 /* Return true if BINOPTAB is for a trapping-on-overflow operation. */
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83
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84 inline bool
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85 trapv_binoptab_p (optab binoptab)
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86 {
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87 return (binoptab == addv_optab
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88 || binoptab == subv_optab
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89 || binoptab == smulv_optab);
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90 }
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91
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92 /* Return insn code for a comparison operator with VMODE
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93 resultin MASK_MODE, unsigned if UNS is true. */
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94
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95 static inline enum insn_code
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96 get_vec_cmp_icode (machine_mode vmode, machine_mode mask_mode, bool uns)
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97 {
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98 optab tab = uns ? vec_cmpu_optab : vec_cmp_optab;
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99 return convert_optab_handler (tab, vmode, mask_mode);
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100 }
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101
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102 /* Return insn code for a comparison operator with VMODE
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103 resultin MASK_MODE (only for EQ/NE). */
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104
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105 static inline enum insn_code
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106 get_vec_cmp_eq_icode (machine_mode vmode, machine_mode mask_mode)
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107 {
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108 return convert_optab_handler (vec_cmpeq_optab, vmode, mask_mode);
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109 }
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110
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111 /* Return insn code for a conditional operator with a comparison in
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112 mode CMODE, unsigned if UNS is true, resulting in a value of mode VMODE. */
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113
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114 inline enum insn_code
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115 get_vcond_icode (machine_mode vmode, machine_mode cmode, bool uns)
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116 {
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117 enum insn_code icode = CODE_FOR_nothing;
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118 if (uns)
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119 icode = convert_optab_handler (vcondu_optab, vmode, cmode);
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120 else
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121 icode = convert_optab_handler (vcond_optab, vmode, cmode);
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122 return icode;
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123 }
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124
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125 /* Return insn code for a conditional operator with a mask mode
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126 MMODE resulting in a value of mode VMODE. */
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127
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128 static inline enum insn_code
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129 get_vcond_mask_icode (machine_mode vmode, machine_mode mmode)
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130 {
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131 return convert_optab_handler (vcond_mask_optab, vmode, mmode);
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132 }
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133
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134 /* Return insn code for a conditional operator with a comparison in
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135 mode CMODE (only EQ/NE), resulting in a value of mode VMODE. */
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136
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137 static inline enum insn_code
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138 get_vcond_eq_icode (machine_mode vmode, machine_mode cmode)
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139 {
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140 return convert_optab_handler (vcondeq_optab, vmode, cmode);
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141 }
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142
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143 /* Enumerates the possible extraction_insn operations. */
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144 enum extraction_pattern { EP_insv, EP_extv, EP_extzv };
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145
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146 /* Describes an instruction that inserts or extracts a bitfield. */
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147 struct extraction_insn
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148 {
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149 /* The code of the instruction. */
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150 enum insn_code icode;
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151
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152 /* The mode that the structure operand should have. This is byte_mode
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153 when using the legacy insv, extv and extzv patterns to access memory.
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154 If no mode is given, the structure is a BLKmode memory. */
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155 opt_scalar_int_mode struct_mode;
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156
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157 /* The mode of the field to be inserted or extracted, and by extension
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158 the mode of the insertion or extraction itself. */
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159 scalar_int_mode field_mode;
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160
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161 /* The mode of the field's bit position. This is only important
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162 when the position is variable rather than constant. */
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163 scalar_int_mode pos_mode;
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164 };
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165
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166 bool get_best_reg_extraction_insn (extraction_insn *,
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167 enum extraction_pattern,
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168 unsigned HOST_WIDE_INT, machine_mode);
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169 bool get_best_mem_extraction_insn (extraction_insn *,
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170 enum extraction_pattern,
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171 HOST_WIDE_INT, HOST_WIDE_INT, machine_mode);
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172
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173 enum insn_code can_extend_p (machine_mode, machine_mode, int);
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174 enum insn_code can_float_p (machine_mode, machine_mode, int);
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175 enum insn_code can_fix_p (machine_mode, machine_mode, int, bool *);
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176 bool can_conditionally_move_p (machine_mode mode);
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131
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177 opt_machine_mode qimode_for_vec_perm (machine_mode);
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178 bool selector_fits_mode_p (machine_mode, const vec_perm_indices &);
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179 bool can_vec_perm_var_p (machine_mode);
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180 bool can_vec_perm_const_p (machine_mode, const vec_perm_indices &,
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181 bool = true);
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111
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182 /* Find a widening optab even if it doesn't widen as much as we want. */
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131
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183 #define find_widening_optab_handler(A, B, C) \
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184 find_widening_optab_handler_and_mode (A, B, C, NULL)
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185 enum insn_code find_widening_optab_handler_and_mode (optab, machine_mode,
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186 machine_mode,
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187 machine_mode *);
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188 int can_mult_highpart_p (machine_mode, bool);
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189 bool can_vec_mask_load_store_p (machine_mode, machine_mode, bool);
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190 bool can_compare_and_swap_p (machine_mode, bool);
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191 bool can_atomic_exchange_p (machine_mode, bool);
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192 bool can_atomic_load_p (machine_mode);
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193 bool lshift_cheap_p (bool);
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131
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194 bool supports_vec_gather_load_p ();
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195 bool supports_vec_scatter_store_p ();
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196
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197 /* Version of find_widening_optab_handler_and_mode that operates on
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198 specific mode types. */
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199
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200 template<typename T>
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201 inline enum insn_code
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202 find_widening_optab_handler_and_mode (optab op, const T &to_mode,
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203 const T &from_mode, T *found_mode)
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204 {
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205 machine_mode tmp;
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206 enum insn_code icode = find_widening_optab_handler_and_mode
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207 (op, machine_mode (to_mode), machine_mode (from_mode), &tmp);
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208 if (icode != CODE_FOR_nothing && found_mode)
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209 *found_mode = as_a <T> (tmp);
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210 return icode;
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211 }
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111
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212
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213 #endif
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