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111
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1 /* Mapping from optabs to underlying library functions
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131
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2 Copyright (C) 1987-2018 Free Software Foundation, Inc.
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111
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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 it under
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7 the terms of the GNU General Public License as published by the Free
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8 Software Foundation; either version 3, or (at your option) any later
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9 version.
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10
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11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 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
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21 #include "config.h"
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22 #include "system.h"
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23 #include "coretypes.h"
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24 #include "target.h"
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25 #include "insn-codes.h"
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26 #include "optabs-libfuncs.h"
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27 #include "libfuncs.h"
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28 #include "optabs-query.h"
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29 #include "tree.h"
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30 #include "stringpool.h"
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31 #include "varasm.h"
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32 #include "stor-layout.h"
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33 #include "rtl.h"
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34
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35 struct target_libfuncs default_target_libfuncs;
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36 #if SWITCHABLE_TARGET
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37 struct target_libfuncs *this_target_libfuncs = &default_target_libfuncs;
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38 #endif
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39
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40 #define libfunc_hash \
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41 (this_target_libfuncs->x_libfunc_hash)
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42
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43 /* Prefixes for the current version of decimal floating point (BID vs. DPD) */
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44 #if ENABLE_DECIMAL_BID_FORMAT
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45 #define DECIMAL_PREFIX "bid_"
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46 #else
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47 #define DECIMAL_PREFIX "dpd_"
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48 #endif
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49
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50 /* Used for libfunc_hash. */
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51
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52 hashval_t
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53 libfunc_hasher::hash (libfunc_entry *e)
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54 {
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55 return ((e->mode1 + e->mode2 * NUM_MACHINE_MODES) ^ e->op);
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56 }
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57
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58 /* Used for libfunc_hash. */
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59
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60 bool
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61 libfunc_hasher::equal (libfunc_entry *e1, libfunc_entry *e2)
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62 {
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63 return e1->op == e2->op && e1->mode1 == e2->mode1 && e1->mode2 == e2->mode2;
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64 }
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65
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66 /* Return libfunc corresponding operation defined by OPTAB converting
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67 from MODE2 to MODE1. Trigger lazy initialization if needed, return NULL
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68 if no libfunc is available. */
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69 rtx
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70 convert_optab_libfunc (convert_optab optab, machine_mode mode1,
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71 machine_mode mode2)
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72 {
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73 struct libfunc_entry e;
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74 struct libfunc_entry **slot;
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75
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76 /* ??? This ought to be an assert, but not all of the places
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77 that we expand optabs know about the optabs that got moved
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78 to being direct. */
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79 if (!(optab >= FIRST_CONV_OPTAB && optab <= LAST_CONVLIB_OPTAB))
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80 return NULL_RTX;
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81
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82 e.op = optab;
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83 e.mode1 = mode1;
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84 e.mode2 = mode2;
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85 slot = libfunc_hash->find_slot (&e, NO_INSERT);
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86 if (!slot)
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87 {
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88 const struct convert_optab_libcall_d *d
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89 = &convlib_def[optab - FIRST_CONV_OPTAB];
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90
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91 if (d->libcall_gen == NULL)
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92 return NULL;
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93
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94 d->libcall_gen (optab, d->libcall_basename, mode1, mode2);
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95 slot = libfunc_hash->find_slot (&e, NO_INSERT);
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96 if (!slot)
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97 return NULL;
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98 }
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99 return (*slot)->libfunc;
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100 }
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101
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102 /* Return libfunc corresponding operation defined by OPTAB in MODE.
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103 Trigger lazy initialization if needed, return NULL if no libfunc is
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104 available. */
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105 rtx
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106 optab_libfunc (optab optab, machine_mode mode)
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107 {
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108 struct libfunc_entry e;
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109 struct libfunc_entry **slot;
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110
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111 /* ??? This ought to be an assert, but not all of the places
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112 that we expand optabs know about the optabs that got moved
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113 to being direct. */
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114 if (!(optab >= FIRST_NORM_OPTAB && optab <= LAST_NORMLIB_OPTAB))
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115 return NULL_RTX;
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116
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117 e.op = optab;
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118 e.mode1 = mode;
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119 e.mode2 = VOIDmode;
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120 slot = libfunc_hash->find_slot (&e, NO_INSERT);
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121 if (!slot)
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122 {
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123 const struct optab_libcall_d *d
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124 = &normlib_def[optab - FIRST_NORM_OPTAB];
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125
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126 if (d->libcall_gen == NULL)
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127 return NULL;
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128
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129 d->libcall_gen (optab, d->libcall_basename, d->libcall_suffix, mode);
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130 slot = libfunc_hash->find_slot (&e, NO_INSERT);
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131 if (!slot)
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132 return NULL;
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133 }
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134 return (*slot)->libfunc;
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135 }
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136
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137 /* Initialize the libfunc fields of an entire group of entries in some
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138 optab. Each entry is set equal to a string consisting of a leading
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139 pair of underscores followed by a generic operation name followed by
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140 a mode name (downshifted to lowercase) followed by a single character
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141 representing the number of operands for the given operation (which is
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142 usually one of the characters '2', '3', or '4').
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143
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144 OPTABLE is the table in which libfunc fields are to be initialized.
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145 OPNAME is the generic (string) name of the operation.
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146 SUFFIX is the character which specifies the number of operands for
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147 the given generic operation.
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148 MODE is the mode to generate for. */
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149
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150 static void
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151 gen_libfunc (optab optable, const char *opname, int suffix,
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152 machine_mode mode)
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153 {
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154 unsigned opname_len = strlen (opname);
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155 const char *mname = GET_MODE_NAME (mode);
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156 unsigned mname_len = strlen (mname);
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157 int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2;
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158 int len = prefix_len + opname_len + mname_len + 1 + 1;
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159 char *libfunc_name = XALLOCAVEC (char, len);
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160 char *p;
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161 const char *q;
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162
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163 p = libfunc_name;
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164 *p++ = '_';
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165 *p++ = '_';
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166 if (targetm.libfunc_gnu_prefix)
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167 {
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168 *p++ = 'g';
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169 *p++ = 'n';
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170 *p++ = 'u';
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171 *p++ = '_';
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172 }
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173 for (q = opname; *q;)
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174 *p++ = *q++;
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175 for (q = mname; *q; q++)
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176 *p++ = TOLOWER (*q);
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177 *p++ = suffix;
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178 *p = '\0';
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179
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180 set_optab_libfunc (optable, mode,
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181 ggc_alloc_string (libfunc_name, p - libfunc_name));
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182 }
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183
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184 /* Like gen_libfunc, but verify that integer operation is involved. */
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185
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186 void
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187 gen_int_libfunc (optab optable, const char *opname, char suffix,
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188 machine_mode mode)
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189 {
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190 int maxsize = 2 * BITS_PER_WORD;
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191 int minsize = BITS_PER_WORD;
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192 scalar_int_mode int_mode;
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193
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194 if (!is_int_mode (mode, &int_mode))
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195 return;
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196 if (maxsize < LONG_LONG_TYPE_SIZE)
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197 maxsize = LONG_LONG_TYPE_SIZE;
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198 if (minsize > INT_TYPE_SIZE
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199 && (trapv_binoptab_p (optable)
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200 || trapv_unoptab_p (optable)))
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201 minsize = INT_TYPE_SIZE;
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202 if (GET_MODE_BITSIZE (int_mode) < minsize
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203 || GET_MODE_BITSIZE (int_mode) > maxsize)
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204 return;
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205 gen_libfunc (optable, opname, suffix, int_mode);
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206 }
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207
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208 /* Like gen_libfunc, but verify that FP and set decimal prefix if needed. */
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209
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210 void
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211 gen_fp_libfunc (optab optable, const char *opname, char suffix,
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212 machine_mode mode)
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213 {
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214 char *dec_opname;
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215
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216 if (GET_MODE_CLASS (mode) == MODE_FLOAT)
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217 gen_libfunc (optable, opname, suffix, mode);
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218 if (DECIMAL_FLOAT_MODE_P (mode))
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219 {
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220 dec_opname = XALLOCAVEC (char, sizeof (DECIMAL_PREFIX) + strlen (opname));
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221 /* For BID support, change the name to have either a bid_ or dpd_ prefix
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222 depending on the low level floating format used. */
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223 memcpy (dec_opname, DECIMAL_PREFIX, sizeof (DECIMAL_PREFIX) - 1);
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224 strcpy (dec_opname + sizeof (DECIMAL_PREFIX) - 1, opname);
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225 gen_libfunc (optable, dec_opname, suffix, mode);
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226 }
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227 }
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228
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229 /* Like gen_libfunc, but verify that fixed-point operation is involved. */
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230
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231 void
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232 gen_fixed_libfunc (optab optable, const char *opname, char suffix,
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233 machine_mode mode)
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234 {
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235 if (!ALL_FIXED_POINT_MODE_P (mode))
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236 return;
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237 gen_libfunc (optable, opname, suffix, mode);
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238 }
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239
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240 /* Like gen_libfunc, but verify that signed fixed-point operation is
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241 involved. */
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242
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243 void
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244 gen_signed_fixed_libfunc (optab optable, const char *opname, char suffix,
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245 machine_mode mode)
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246 {
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247 if (!SIGNED_FIXED_POINT_MODE_P (mode))
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248 return;
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249 gen_libfunc (optable, opname, suffix, mode);
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250 }
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251
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252 /* Like gen_libfunc, but verify that unsigned fixed-point operation is
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253 involved. */
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254
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255 void
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256 gen_unsigned_fixed_libfunc (optab optable, const char *opname, char suffix,
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257 machine_mode mode)
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258 {
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259 if (!UNSIGNED_FIXED_POINT_MODE_P (mode))
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260 return;
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261 gen_libfunc (optable, opname, suffix, mode);
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262 }
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263
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264 /* Like gen_libfunc, but verify that FP or INT operation is involved. */
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265
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266 void
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267 gen_int_fp_libfunc (optab optable, const char *name, char suffix,
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268 machine_mode mode)
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269 {
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270 if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT)
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271 gen_fp_libfunc (optable, name, suffix, mode);
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272 if (INTEGRAL_MODE_P (mode))
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273 gen_int_libfunc (optable, name, suffix, mode);
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274 }
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275
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276 /* Like gen_libfunc, but verify that FP or INT operation is involved
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277 and add 'v' suffix for integer operation. */
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278
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279 void
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280 gen_intv_fp_libfunc (optab optable, const char *name, char suffix,
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281 machine_mode mode)
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282 {
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283 if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT)
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284 gen_fp_libfunc (optable, name, suffix, mode);
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285 if (GET_MODE_CLASS (mode) == MODE_INT)
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286 {
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287 int len = strlen (name);
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288 char *v_name = XALLOCAVEC (char, len + 2);
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289 strcpy (v_name, name);
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290 v_name[len] = 'v';
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291 v_name[len + 1] = 0;
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292 gen_int_libfunc (optable, v_name, suffix, mode);
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293 }
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294 }
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295
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296 /* Like gen_libfunc, but verify that FP or INT or FIXED operation is
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297 involved. */
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298
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299 void
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300 gen_int_fp_fixed_libfunc (optab optable, const char *name, char suffix,
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301 machine_mode mode)
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302 {
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303 if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT)
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304 gen_fp_libfunc (optable, name, suffix, mode);
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305 if (INTEGRAL_MODE_P (mode))
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306 gen_int_libfunc (optable, name, suffix, mode);
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307 if (ALL_FIXED_POINT_MODE_P (mode))
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308 gen_fixed_libfunc (optable, name, suffix, mode);
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309 }
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310
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311 /* Like gen_libfunc, but verify that FP or INT or signed FIXED operation is
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312 involved. */
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313
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314 void
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315 gen_int_fp_signed_fixed_libfunc (optab optable, const char *name, char suffix,
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316 machine_mode mode)
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317 {
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318 if (DECIMAL_FLOAT_MODE_P (mode) || GET_MODE_CLASS (mode) == MODE_FLOAT)
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319 gen_fp_libfunc (optable, name, suffix, mode);
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320 if (INTEGRAL_MODE_P (mode))
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321 gen_int_libfunc (optable, name, suffix, mode);
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322 if (SIGNED_FIXED_POINT_MODE_P (mode))
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323 gen_signed_fixed_libfunc (optable, name, suffix, mode);
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324 }
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325
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326 /* Like gen_libfunc, but verify that INT or FIXED operation is
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327 involved. */
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328
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329 void
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330 gen_int_fixed_libfunc (optab optable, const char *name, char suffix,
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331 machine_mode mode)
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332 {
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333 if (INTEGRAL_MODE_P (mode))
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334 gen_int_libfunc (optable, name, suffix, mode);
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335 if (ALL_FIXED_POINT_MODE_P (mode))
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336 gen_fixed_libfunc (optable, name, suffix, mode);
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337 }
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338
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339 /* Like gen_libfunc, but verify that INT or signed FIXED operation is
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340 involved. */
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341
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342 void
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343 gen_int_signed_fixed_libfunc (optab optable, const char *name, char suffix,
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344 machine_mode mode)
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345 {
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346 if (INTEGRAL_MODE_P (mode))
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347 gen_int_libfunc (optable, name, suffix, mode);
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348 if (SIGNED_FIXED_POINT_MODE_P (mode))
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349 gen_signed_fixed_libfunc (optable, name, suffix, mode);
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350 }
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351
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352 /* Like gen_libfunc, but verify that INT or unsigned FIXED operation is
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353 involved. */
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354
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355 void
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356 gen_int_unsigned_fixed_libfunc (optab optable, const char *name, char suffix,
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357 machine_mode mode)
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358 {
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359 if (INTEGRAL_MODE_P (mode))
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360 gen_int_libfunc (optable, name, suffix, mode);
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361 if (UNSIGNED_FIXED_POINT_MODE_P (mode))
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362 gen_unsigned_fixed_libfunc (optable, name, suffix, mode);
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363 }
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364
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365 /* Initialize the libfunc fields of an entire group of entries of an
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366 inter-mode-class conversion optab. The string formation rules are
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367 similar to the ones for init_libfuncs, above, but instead of having
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368 a mode name and an operand count these functions have two mode names
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369 and no operand count. */
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370
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371 void
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372 gen_interclass_conv_libfunc (convert_optab tab,
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373 const char *opname,
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374 machine_mode tmode,
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375 machine_mode fmode)
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376 {
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377 size_t opname_len = strlen (opname);
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378 size_t mname_len = 0;
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379
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380 const char *fname, *tname;
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381 const char *q;
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382 int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2;
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383 char *libfunc_name, *suffix;
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384 char *nondec_name, *dec_name, *nondec_suffix, *dec_suffix;
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385 char *p;
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386
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387 /* If this is a decimal conversion, add the current BID vs. DPD prefix that
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388 depends on which underlying decimal floating point format is used. */
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389 const size_t dec_len = sizeof (DECIMAL_PREFIX) - 1;
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390
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391 mname_len = strlen (GET_MODE_NAME (tmode)) + strlen (GET_MODE_NAME (fmode));
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392
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393 nondec_name = XALLOCAVEC (char, prefix_len + opname_len + mname_len + 1 + 1);
|
|
|
394 nondec_name[0] = '_';
|
|
|
395 nondec_name[1] = '_';
|
|
|
396 if (targetm.libfunc_gnu_prefix)
|
|
|
397 {
|
|
|
398 nondec_name[2] = 'g';
|
|
|
399 nondec_name[3] = 'n';
|
|
|
400 nondec_name[4] = 'u';
|
|
|
401 nondec_name[5] = '_';
|
|
|
402 }
|
|
|
403
|
|
|
404 memcpy (&nondec_name[prefix_len], opname, opname_len);
|
|
|
405 nondec_suffix = nondec_name + opname_len + prefix_len;
|
|
|
406
|
|
|
407 dec_name = XALLOCAVEC (char, 2 + dec_len + opname_len + mname_len + 1 + 1);
|
|
|
408 dec_name[0] = '_';
|
|
|
409 dec_name[1] = '_';
|
|
|
410 memcpy (&dec_name[2], DECIMAL_PREFIX, dec_len);
|
|
|
411 memcpy (&dec_name[2+dec_len], opname, opname_len);
|
|
|
412 dec_suffix = dec_name + dec_len + opname_len + 2;
|
|
|
413
|
|
|
414 fname = GET_MODE_NAME (fmode);
|
|
|
415 tname = GET_MODE_NAME (tmode);
|
|
|
416
|
|
|
417 if (DECIMAL_FLOAT_MODE_P (fmode) || DECIMAL_FLOAT_MODE_P (tmode))
|
|
|
418 {
|
|
|
419 libfunc_name = dec_name;
|
|
|
420 suffix = dec_suffix;
|
|
|
421 }
|
|
|
422 else
|
|
|
423 {
|
|
|
424 libfunc_name = nondec_name;
|
|
|
425 suffix = nondec_suffix;
|
|
|
426 }
|
|
|
427
|
|
|
428 p = suffix;
|
|
|
429 for (q = fname; *q; p++, q++)
|
|
|
430 *p = TOLOWER (*q);
|
|
|
431 for (q = tname; *q; p++, q++)
|
|
|
432 *p = TOLOWER (*q);
|
|
|
433
|
|
|
434 *p = '\0';
|
|
|
435
|
|
|
436 set_conv_libfunc (tab, tmode, fmode,
|
|
|
437 ggc_alloc_string (libfunc_name, p - libfunc_name));
|
|
|
438 }
|
|
|
439
|
|
|
440 /* Same as gen_interclass_conv_libfunc but verify that we are producing
|
|
|
441 int->fp conversion. */
|
|
|
442
|
|
|
443 void
|
|
|
444 gen_int_to_fp_conv_libfunc (convert_optab tab,
|
|
|
445 const char *opname,
|
|
|
446 machine_mode tmode,
|
|
|
447 machine_mode fmode)
|
|
|
448 {
|
|
|
449 if (GET_MODE_CLASS (fmode) != MODE_INT)
|
|
|
450 return;
|
|
|
451 if (GET_MODE_CLASS (tmode) != MODE_FLOAT && !DECIMAL_FLOAT_MODE_P (tmode))
|
|
|
452 return;
|
|
|
453 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
454 }
|
|
|
455
|
|
|
456 /* ufloat_optab is special by using floatun for FP and floatuns decimal fp
|
|
|
457 naming scheme. */
|
|
|
458
|
|
|
459 void
|
|
|
460 gen_ufloat_conv_libfunc (convert_optab tab,
|
|
|
461 const char *opname ATTRIBUTE_UNUSED,
|
|
|
462 machine_mode tmode,
|
|
|
463 machine_mode fmode)
|
|
|
464 {
|
|
|
465 if (DECIMAL_FLOAT_MODE_P (tmode))
|
|
|
466 gen_int_to_fp_conv_libfunc (tab, "floatuns", tmode, fmode);
|
|
|
467 else
|
|
|
468 gen_int_to_fp_conv_libfunc (tab, "floatun", tmode, fmode);
|
|
|
469 }
|
|
|
470
|
|
|
471 /* Same as gen_interclass_conv_libfunc but verify that we are producing
|
|
|
472 fp->int conversion. */
|
|
|
473
|
|
|
474 void
|
|
|
475 gen_int_to_fp_nondecimal_conv_libfunc (convert_optab tab,
|
|
|
476 const char *opname,
|
|
|
477 machine_mode tmode,
|
|
|
478 machine_mode fmode)
|
|
|
479 {
|
|
|
480 if (GET_MODE_CLASS (fmode) != MODE_INT)
|
|
|
481 return;
|
|
|
482 if (GET_MODE_CLASS (tmode) != MODE_FLOAT)
|
|
|
483 return;
|
|
|
484 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
485 }
|
|
|
486
|
|
|
487 /* Same as gen_interclass_conv_libfunc but verify that we are producing
|
|
|
488 fp->int conversion with no decimal floating point involved. */
|
|
|
489
|
|
|
490 void
|
|
|
491 gen_fp_to_int_conv_libfunc (convert_optab tab,
|
|
|
492 const char *opname,
|
|
|
493 machine_mode tmode,
|
|
|
494 machine_mode fmode)
|
|
|
495 {
|
|
|
496 if (GET_MODE_CLASS (fmode) != MODE_FLOAT && !DECIMAL_FLOAT_MODE_P (fmode))
|
|
|
497 return;
|
|
|
498 if (GET_MODE_CLASS (tmode) != MODE_INT)
|
|
|
499 return;
|
|
|
500 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
501 }
|
|
|
502
|
|
|
503 /* Initialize the libfunc fields of an of an intra-mode-class conversion optab.
|
|
|
504 The string formation rules are
|
|
|
505 similar to the ones for init_libfunc, above. */
|
|
|
506
|
|
|
507 void
|
|
|
508 gen_intraclass_conv_libfunc (convert_optab tab, const char *opname,
|
|
|
509 machine_mode tmode, machine_mode fmode)
|
|
|
510 {
|
|
|
511 size_t opname_len = strlen (opname);
|
|
|
512 size_t mname_len = 0;
|
|
|
513
|
|
|
514 const char *fname, *tname;
|
|
|
515 const char *q;
|
|
|
516 int prefix_len = targetm.libfunc_gnu_prefix ? 6 : 2;
|
|
|
517 char *nondec_name, *dec_name, *nondec_suffix, *dec_suffix;
|
|
|
518 char *libfunc_name, *suffix;
|
|
|
519 char *p;
|
|
|
520
|
|
|
521 /* If this is a decimal conversion, add the current BID vs. DPD prefix that
|
|
|
522 depends on which underlying decimal floating point format is used. */
|
|
|
523 const size_t dec_len = sizeof (DECIMAL_PREFIX) - 1;
|
|
|
524
|
|
|
525 mname_len = strlen (GET_MODE_NAME (tmode)) + strlen (GET_MODE_NAME (fmode));
|
|
|
526
|
|
|
527 nondec_name = XALLOCAVEC (char, 2 + opname_len + mname_len + 1 + 1);
|
|
|
528 nondec_name[0] = '_';
|
|
|
529 nondec_name[1] = '_';
|
|
|
530 if (targetm.libfunc_gnu_prefix)
|
|
|
531 {
|
|
|
532 nondec_name[2] = 'g';
|
|
|
533 nondec_name[3] = 'n';
|
|
|
534 nondec_name[4] = 'u';
|
|
|
535 nondec_name[5] = '_';
|
|
|
536 }
|
|
|
537 memcpy (&nondec_name[prefix_len], opname, opname_len);
|
|
|
538 nondec_suffix = nondec_name + opname_len + prefix_len;
|
|
|
539
|
|
|
540 dec_name = XALLOCAVEC (char, 2 + dec_len + opname_len + mname_len + 1 + 1);
|
|
|
541 dec_name[0] = '_';
|
|
|
542 dec_name[1] = '_';
|
|
|
543 memcpy (&dec_name[2], DECIMAL_PREFIX, dec_len);
|
|
|
544 memcpy (&dec_name[2 + dec_len], opname, opname_len);
|
|
|
545 dec_suffix = dec_name + dec_len + opname_len + 2;
|
|
|
546
|
|
|
547 fname = GET_MODE_NAME (fmode);
|
|
|
548 tname = GET_MODE_NAME (tmode);
|
|
|
549
|
|
|
550 if (DECIMAL_FLOAT_MODE_P (fmode) || DECIMAL_FLOAT_MODE_P (tmode))
|
|
|
551 {
|
|
|
552 libfunc_name = dec_name;
|
|
|
553 suffix = dec_suffix;
|
|
|
554 }
|
|
|
555 else
|
|
|
556 {
|
|
|
557 libfunc_name = nondec_name;
|
|
|
558 suffix = nondec_suffix;
|
|
|
559 }
|
|
|
560
|
|
|
561 p = suffix;
|
|
|
562 for (q = fname; *q; p++, q++)
|
|
|
563 *p = TOLOWER (*q);
|
|
|
564 for (q = tname; *q; p++, q++)
|
|
|
565 *p = TOLOWER (*q);
|
|
|
566
|
|
|
567 *p++ = '2';
|
|
|
568 *p = '\0';
|
|
|
569
|
|
|
570 set_conv_libfunc (tab, tmode, fmode,
|
|
|
571 ggc_alloc_string (libfunc_name, p - libfunc_name));
|
|
|
572 }
|
|
|
573
|
|
|
574 /* Pick proper libcall for trunc_optab. We need to chose if we do
|
|
|
575 truncation or extension and interclass or intraclass. */
|
|
|
576
|
|
|
577 void
|
|
|
578 gen_trunc_conv_libfunc (convert_optab tab,
|
|
|
579 const char *opname,
|
|
|
580 machine_mode tmode,
|
|
|
581 machine_mode fmode)
|
|
|
582 {
|
|
|
583 scalar_float_mode float_tmode, float_fmode;
|
|
|
584 if (!is_a <scalar_float_mode> (fmode, &float_fmode)
|
|
|
585 || !is_a <scalar_float_mode> (tmode, &float_tmode)
|
|
|
586 || float_tmode == float_fmode)
|
|
|
587 return;
|
|
|
588
|
|
|
589 if (GET_MODE_CLASS (float_tmode) != GET_MODE_CLASS (float_fmode))
|
|
|
590 gen_interclass_conv_libfunc (tab, opname, float_tmode, float_fmode);
|
|
|
591
|
|
|
592 if (GET_MODE_PRECISION (float_fmode) <= GET_MODE_PRECISION (float_tmode))
|
|
|
593 return;
|
|
|
594
|
|
|
595 if (GET_MODE_CLASS (float_tmode) == GET_MODE_CLASS (float_fmode))
|
|
|
596 gen_intraclass_conv_libfunc (tab, opname, float_tmode, float_fmode);
|
|
|
597 }
|
|
|
598
|
|
|
599 /* Pick proper libcall for extend_optab. We need to chose if we do
|
|
|
600 truncation or extension and interclass or intraclass. */
|
|
|
601
|
|
|
602 void
|
|
|
603 gen_extend_conv_libfunc (convert_optab tab,
|
|
|
604 const char *opname ATTRIBUTE_UNUSED,
|
|
|
605 machine_mode tmode,
|
|
|
606 machine_mode fmode)
|
|
|
607 {
|
|
|
608 scalar_float_mode float_tmode, float_fmode;
|
|
|
609 if (!is_a <scalar_float_mode> (fmode, &float_fmode)
|
|
|
610 || !is_a <scalar_float_mode> (tmode, &float_tmode)
|
|
|
611 || float_tmode == float_fmode)
|
|
|
612 return;
|
|
|
613
|
|
|
614 if (GET_MODE_CLASS (float_tmode) != GET_MODE_CLASS (float_fmode))
|
|
|
615 gen_interclass_conv_libfunc (tab, opname, float_tmode, float_fmode);
|
|
|
616
|
|
|
617 if (GET_MODE_PRECISION (float_fmode) > GET_MODE_PRECISION (float_tmode))
|
|
|
618 return;
|
|
|
619
|
|
|
620 if (GET_MODE_CLASS (float_tmode) == GET_MODE_CLASS (float_fmode))
|
|
|
621 gen_intraclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
622 }
|
|
|
623
|
|
|
624 /* Pick proper libcall for fract_optab. We need to chose if we do
|
|
|
625 interclass or intraclass. */
|
|
|
626
|
|
|
627 void
|
|
|
628 gen_fract_conv_libfunc (convert_optab tab,
|
|
|
629 const char *opname,
|
|
|
630 machine_mode tmode,
|
|
|
631 machine_mode fmode)
|
|
|
632 {
|
|
|
633 if (tmode == fmode)
|
|
|
634 return;
|
|
|
635 if (!(ALL_FIXED_POINT_MODE_P (tmode) || ALL_FIXED_POINT_MODE_P (fmode)))
|
|
|
636 return;
|
|
|
637
|
|
|
638 if (GET_MODE_CLASS (tmode) == GET_MODE_CLASS (fmode))
|
|
|
639 gen_intraclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
640 else
|
|
|
641 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
642 }
|
|
|
643
|
|
|
644 /* Pick proper libcall for fractuns_optab. */
|
|
|
645
|
|
|
646 void
|
|
|
647 gen_fractuns_conv_libfunc (convert_optab tab,
|
|
|
648 const char *opname,
|
|
|
649 machine_mode tmode,
|
|
|
650 machine_mode fmode)
|
|
|
651 {
|
|
|
652 if (tmode == fmode)
|
|
|
653 return;
|
|
|
654 /* One mode must be a fixed-point mode, and the other must be an integer
|
|
|
655 mode. */
|
|
|
656 if (!((ALL_FIXED_POINT_MODE_P (tmode) && GET_MODE_CLASS (fmode) == MODE_INT)
|
|
|
657 || (ALL_FIXED_POINT_MODE_P (fmode)
|
|
|
658 && GET_MODE_CLASS (tmode) == MODE_INT)))
|
|
|
659 return;
|
|
|
660
|
|
|
661 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
662 }
|
|
|
663
|
|
|
664 /* Pick proper libcall for satfract_optab. We need to chose if we do
|
|
|
665 interclass or intraclass. */
|
|
|
666
|
|
|
667 void
|
|
|
668 gen_satfract_conv_libfunc (convert_optab tab,
|
|
|
669 const char *opname,
|
|
|
670 machine_mode tmode,
|
|
|
671 machine_mode fmode)
|
|
|
672 {
|
|
|
673 if (tmode == fmode)
|
|
|
674 return;
|
|
|
675 /* TMODE must be a fixed-point mode. */
|
|
|
676 if (!ALL_FIXED_POINT_MODE_P (tmode))
|
|
|
677 return;
|
|
|
678
|
|
|
679 if (GET_MODE_CLASS (tmode) == GET_MODE_CLASS (fmode))
|
|
|
680 gen_intraclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
681 else
|
|
|
682 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
683 }
|
|
|
684
|
|
|
685 /* Pick proper libcall for satfractuns_optab. */
|
|
|
686
|
|
|
687 void
|
|
|
688 gen_satfractuns_conv_libfunc (convert_optab tab,
|
|
|
689 const char *opname,
|
|
|
690 machine_mode tmode,
|
|
|
691 machine_mode fmode)
|
|
|
692 {
|
|
|
693 if (tmode == fmode)
|
|
|
694 return;
|
|
|
695 /* TMODE must be a fixed-point mode, and FMODE must be an integer mode. */
|
|
|
696 if (!(ALL_FIXED_POINT_MODE_P (tmode) && GET_MODE_CLASS (fmode) == MODE_INT))
|
|
|
697 return;
|
|
|
698
|
|
|
699 gen_interclass_conv_libfunc (tab, opname, tmode, fmode);
|
|
|
700 }
|
|
|
701
|
|
|
702 /* Hashtable callbacks for libfunc_decls. */
|
|
|
703
|
|
|
704 struct libfunc_decl_hasher : ggc_ptr_hash<tree_node>
|
|
|
705 {
|
|
|
706 static hashval_t
|
|
|
707 hash (tree entry)
|
|
|
708 {
|
|
|
709 return IDENTIFIER_HASH_VALUE (DECL_NAME (entry));
|
|
|
710 }
|
|
|
711
|
|
|
712 static bool
|
|
|
713 equal (tree decl, tree name)
|
|
|
714 {
|
|
|
715 return DECL_NAME (decl) == name;
|
|
|
716 }
|
|
|
717 };
|
|
|
718
|
|
|
719 /* A table of previously-created libfuncs, hashed by name. */
|
|
|
720 static GTY (()) hash_table<libfunc_decl_hasher> *libfunc_decls;
|
|
|
721
|
|
|
722 /* Build a decl for a libfunc named NAME. */
|
|
|
723
|
|
|
724 tree
|
|
|
725 build_libfunc_function (const char *name)
|
|
|
726 {
|
|
|
727 /* ??? We don't have any type information; pretend this is "int foo ()". */
|
|
|
728 tree decl = build_decl (UNKNOWN_LOCATION, FUNCTION_DECL,
|
|
|
729 get_identifier (name),
|
|
|
730 build_function_type (integer_type_node, NULL_TREE));
|
|
|
731 DECL_EXTERNAL (decl) = 1;
|
|
|
732 TREE_PUBLIC (decl) = 1;
|
|
|
733 DECL_ARTIFICIAL (decl) = 1;
|
|
|
734 DECL_VISIBILITY (decl) = VISIBILITY_DEFAULT;
|
|
|
735 DECL_VISIBILITY_SPECIFIED (decl) = 1;
|
|
|
736 gcc_assert (DECL_ASSEMBLER_NAME (decl));
|
|
|
737
|
|
|
738 /* Zap the nonsensical SYMBOL_REF_DECL for this. What we're left with
|
|
|
739 are the flags assigned by targetm.encode_section_info. */
|
|
|
740 SET_SYMBOL_REF_DECL (XEXP (DECL_RTL (decl), 0), NULL);
|
|
|
741
|
|
|
742 return decl;
|
|
|
743 }
|
|
|
744
|
|
|
745 /* Return a libfunc for NAME, creating one if we don't already have one.
|
|
|
746 The returned rtx is a SYMBOL_REF. */
|
|
|
747
|
|
|
748 rtx
|
|
|
749 init_one_libfunc (const char *name)
|
|
|
750 {
|
|
|
751 tree id, decl;
|
|
|
752 hashval_t hash;
|
|
|
753
|
|
|
754 if (libfunc_decls == NULL)
|
|
|
755 libfunc_decls = hash_table<libfunc_decl_hasher>::create_ggc (37);
|
|
|
756
|
|
|
757 /* See if we have already created a libfunc decl for this function. */
|
|
|
758 id = get_identifier (name);
|
|
|
759 hash = IDENTIFIER_HASH_VALUE (id);
|
|
|
760 tree *slot = libfunc_decls->find_slot_with_hash (id, hash, INSERT);
|
|
|
761 decl = *slot;
|
|
|
762 if (decl == NULL)
|
|
|
763 {
|
|
|
764 /* Create a new decl, so that it can be passed to
|
|
|
765 targetm.encode_section_info. */
|
|
|
766 decl = build_libfunc_function (name);
|
|
|
767 *slot = decl;
|
|
|
768 }
|
|
|
769 return XEXP (DECL_RTL (decl), 0);
|
|
|
770 }
|
|
|
771
|
|
|
772 /* Adjust the assembler name of libfunc NAME to ASMSPEC. */
|
|
|
773
|
|
|
774 rtx
|
|
|
775 set_user_assembler_libfunc (const char *name, const char *asmspec)
|
|
|
776 {
|
|
|
777 tree id, decl;
|
|
|
778 hashval_t hash;
|
|
|
779
|
|
|
780 id = get_identifier (name);
|
|
|
781 hash = IDENTIFIER_HASH_VALUE (id);
|
|
|
782 tree *slot = libfunc_decls->find_slot_with_hash (id, hash, NO_INSERT);
|
|
|
783 gcc_assert (slot);
|
|
|
784 decl = (tree) *slot;
|
|
|
785 set_user_assembler_name (decl, asmspec);
|
|
|
786 return XEXP (DECL_RTL (decl), 0);
|
|
|
787 }
|
|
|
788
|
|
|
789 /* Call this to reset the function entry for one optab (OPTABLE) in mode
|
|
|
790 MODE to NAME, which should be either 0 or a string constant. */
|
|
|
791
|
|
|
792 void
|
|
|
793 set_optab_libfunc (optab op, machine_mode mode, const char *name)
|
|
|
794 {
|
|
|
795 rtx val;
|
|
|
796 struct libfunc_entry e;
|
|
|
797 struct libfunc_entry **slot;
|
|
|
798
|
|
|
799 e.op = op;
|
|
|
800 e.mode1 = mode;
|
|
|
801 e.mode2 = VOIDmode;
|
|
|
802
|
|
|
803 if (name)
|
|
|
804 val = init_one_libfunc (name);
|
|
|
805 else
|
|
|
806 val = 0;
|
|
|
807 slot = libfunc_hash->find_slot (&e, INSERT);
|
|
|
808 if (*slot == NULL)
|
|
|
809 *slot = ggc_alloc<libfunc_entry> ();
|
|
|
810 (*slot)->op = op;
|
|
|
811 (*slot)->mode1 = mode;
|
|
|
812 (*slot)->mode2 = VOIDmode;
|
|
|
813 (*slot)->libfunc = val;
|
|
|
814 }
|
|
|
815
|
|
|
816 /* Call this to reset the function entry for one conversion optab
|
|
|
817 (OPTABLE) from mode FMODE to mode TMODE to NAME, which should be
|
|
|
818 either 0 or a string constant. */
|
|
|
819
|
|
|
820 void
|
|
|
821 set_conv_libfunc (convert_optab optab, machine_mode tmode,
|
|
|
822 machine_mode fmode, const char *name)
|
|
|
823 {
|
|
|
824 rtx val;
|
|
|
825 struct libfunc_entry e;
|
|
|
826 struct libfunc_entry **slot;
|
|
|
827
|
|
|
828 e.op = optab;
|
|
|
829 e.mode1 = tmode;
|
|
|
830 e.mode2 = fmode;
|
|
|
831
|
|
|
832 if (name)
|
|
|
833 val = init_one_libfunc (name);
|
|
|
834 else
|
|
|
835 val = 0;
|
|
|
836 slot = libfunc_hash->find_slot (&e, INSERT);
|
|
|
837 if (*slot == NULL)
|
|
|
838 *slot = ggc_alloc<libfunc_entry> ();
|
|
|
839 (*slot)->op = optab;
|
|
|
840 (*slot)->mode1 = tmode;
|
|
|
841 (*slot)->mode2 = fmode;
|
|
|
842 (*slot)->libfunc = val;
|
|
|
843 }
|
|
|
844
|
|
|
845 /* Call this to initialize the contents of the optabs
|
|
|
846 appropriately for the current target machine. */
|
|
|
847
|
|
|
848 void
|
|
|
849 init_optabs (void)
|
|
|
850 {
|
|
|
851 if (libfunc_hash)
|
|
|
852 libfunc_hash->empty ();
|
|
|
853 else
|
|
|
854 libfunc_hash = hash_table<libfunc_hasher>::create_ggc (10);
|
|
|
855
|
|
|
856 /* Fill in the optabs with the insns we support. */
|
|
|
857 init_all_optabs (this_fn_optabs);
|
|
|
858
|
|
|
859 /* The ffs function operates on `int'. Fall back on it if we do not
|
|
|
860 have a libgcc2 function for that width. */
|
|
|
861 if (INT_TYPE_SIZE < BITS_PER_WORD)
|
|
|
862 {
|
|
|
863 scalar_int_mode mode = int_mode_for_size (INT_TYPE_SIZE, 0).require ();
|
|
|
864 set_optab_libfunc (ffs_optab, mode, "ffs");
|
|
|
865 }
|
|
|
866
|
|
|
867 /* Explicitly initialize the bswap libfuncs since we need them to be
|
|
|
868 valid for things other than word_mode. */
|
|
|
869 if (targetm.libfunc_gnu_prefix)
|
|
|
870 {
|
|
|
871 set_optab_libfunc (bswap_optab, SImode, "__gnu_bswapsi2");
|
|
|
872 set_optab_libfunc (bswap_optab, DImode, "__gnu_bswapdi2");
|
|
|
873 }
|
|
|
874 else
|
|
|
875 {
|
|
|
876 set_optab_libfunc (bswap_optab, SImode, "__bswapsi2");
|
|
|
877 set_optab_libfunc (bswap_optab, DImode, "__bswapdi2");
|
|
|
878 }
|
|
|
879
|
|
|
880 /* Use cabs for double complex abs, since systems generally have cabs.
|
|
|
881 Don't define any libcall for float complex, so that cabs will be used. */
|
|
|
882 if (complex_double_type_node)
|
|
|
883 set_optab_libfunc (abs_optab, TYPE_MODE (complex_double_type_node),
|
|
|
884 "cabs");
|
|
|
885
|
|
|
886 unwind_sjlj_register_libfunc = init_one_libfunc ("_Unwind_SjLj_Register");
|
|
|
887 unwind_sjlj_unregister_libfunc
|
|
|
888 = init_one_libfunc ("_Unwind_SjLj_Unregister");
|
|
|
889
|
|
|
890 /* Allow the target to add more libcalls or rename some, etc. */
|
|
|
891 targetm.init_libfuncs ();
|
|
|
892 }
|
|
|
893
|
|
|
894 /* A helper function for init_sync_libfuncs. Using the basename BASE,
|
|
|
895 install libfuncs into TAB for BASE_N for 1 <= N <= MAX. */
|
|
|
896
|
|
|
897 static void
|
|
|
898 init_sync_libfuncs_1 (optab tab, const char *base, int max)
|
|
|
899 {
|
|
|
900 machine_mode mode;
|
|
|
901 char buf[64];
|
|
|
902 size_t len = strlen (base);
|
|
|
903 int i;
|
|
|
904
|
|
|
905 gcc_assert (max <= 8);
|
|
|
906 gcc_assert (len + 3 < sizeof (buf));
|
|
|
907
|
|
|
908 memcpy (buf, base, len);
|
|
|
909 buf[len] = '_';
|
|
|
910 buf[len + 1] = '0';
|
|
|
911 buf[len + 2] = '\0';
|
|
|
912
|
|
|
913 mode = QImode;
|
|
|
914 for (i = 1; i <= max; i *= 2)
|
|
|
915 {
|
|
|
916 if (i > 1)
|
|
|
917 mode = GET_MODE_2XWIDER_MODE (mode).require ();
|
|
|
918 buf[len + 1] = '0' + i;
|
|
|
919 set_optab_libfunc (tab, mode, buf);
|
|
|
920 }
|
|
|
921 }
|
|
|
922
|
|
|
923 void
|
|
|
924 init_sync_libfuncs (int max)
|
|
|
925 {
|
|
|
926 if (!flag_sync_libcalls)
|
|
|
927 return;
|
|
|
928
|
|
|
929 init_sync_libfuncs_1 (sync_compare_and_swap_optab,
|
|
|
930 "__sync_val_compare_and_swap", max);
|
|
|
931 init_sync_libfuncs_1 (sync_lock_test_and_set_optab,
|
|
|
932 "__sync_lock_test_and_set", max);
|
|
|
933
|
|
|
934 init_sync_libfuncs_1 (sync_old_add_optab, "__sync_fetch_and_add", max);
|
|
|
935 init_sync_libfuncs_1 (sync_old_sub_optab, "__sync_fetch_and_sub", max);
|
|
|
936 init_sync_libfuncs_1 (sync_old_ior_optab, "__sync_fetch_and_or", max);
|
|
|
937 init_sync_libfuncs_1 (sync_old_and_optab, "__sync_fetch_and_and", max);
|
|
|
938 init_sync_libfuncs_1 (sync_old_xor_optab, "__sync_fetch_and_xor", max);
|
|
|
939 init_sync_libfuncs_1 (sync_old_nand_optab, "__sync_fetch_and_nand", max);
|
|
|
940
|
|
|
941 init_sync_libfuncs_1 (sync_new_add_optab, "__sync_add_and_fetch", max);
|
|
|
942 init_sync_libfuncs_1 (sync_new_sub_optab, "__sync_sub_and_fetch", max);
|
|
|
943 init_sync_libfuncs_1 (sync_new_ior_optab, "__sync_or_and_fetch", max);
|
|
|
944 init_sync_libfuncs_1 (sync_new_and_optab, "__sync_and_and_fetch", max);
|
|
|
945 init_sync_libfuncs_1 (sync_new_xor_optab, "__sync_xor_and_fetch", max);
|
|
|
946 init_sync_libfuncs_1 (sync_new_nand_optab, "__sync_nand_and_fetch", max);
|
|
|
947 }
|
|
|
948
|
|
|
949 #include "gt-optabs-libfuncs.h"
|
