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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- G E T _ T A R G --
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6 -- --
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7 -- B o d y --
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8 -- --
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131
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 ------------------------------------------------------------------------------
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22
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23 -- Version shared by various Ada based back-ends (e.g. gnat2scil, gnat2why)
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24
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25 with System.OS_Lib; use System.OS_Lib;
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26
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27 with GNAT.Directory_Operations; use GNAT.Directory_Operations;
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28
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29 package body Get_Targ is
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30
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31 -----------------------
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32 -- Get_Bits_Per_Unit --
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33 -----------------------
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34
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35 function Get_Bits_Per_Unit return Pos is
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36 begin
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37 return 8;
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38 end Get_Bits_Per_Unit;
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39
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40 -----------------------
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41 -- Get_Bits_Per_Word --
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42 -----------------------
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43
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44 function Get_Bits_Per_Word return Pos is
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45 begin
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46 return 32;
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47 end Get_Bits_Per_Word;
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48
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49 -------------------
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50 -- Get_Char_Size --
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51 -------------------
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52
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53 function Get_Char_Size return Pos is
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54 begin
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55 return 8;
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56 end Get_Char_Size;
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57
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131
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58 ----------------------
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59 -- Get_Wchar_T_Size --
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60 ----------------------
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111
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61
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62 function Get_Wchar_T_Size return Pos is
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63 begin
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64 return 16;
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65 end Get_Wchar_T_Size;
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66
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67 --------------------
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68 -- Get_Short_Size --
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69 --------------------
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70
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71 function Get_Short_Size return Pos is
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72 begin
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73 return 16;
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74 end Get_Short_Size;
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75
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76 ------------------
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77 -- Get_Int_Size --
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78 ------------------
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79
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80 function Get_Int_Size return Pos is
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81 begin
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82 return 32;
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83 end Get_Int_Size;
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84
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85 -------------------
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86 -- Get_Long_Size --
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87 -------------------
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88
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89 function Get_Long_Size return Pos is
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90 begin
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91 return 64;
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92 end Get_Long_Size;
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93
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94 ------------------------
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95 -- Get_Long_Long_Size --
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96 ------------------------
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97
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98 function Get_Long_Long_Size return Pos is
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99 begin
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100 return 64;
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101 end Get_Long_Long_Size;
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102
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103 ----------------------
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104 -- Get_Pointer_Size --
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105 ----------------------
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106
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107 function Get_Pointer_Size return Pos is
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108 begin
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109 return 64;
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110 end Get_Pointer_Size;
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111
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112 ---------------------------
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113 -- Get_Maximum_Alignment --
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114 ---------------------------
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115
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116 function Get_Maximum_Alignment return Pos is
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117 begin
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118 return 4;
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119 end Get_Maximum_Alignment;
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120
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121 ------------------------------------
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122 -- Get_System_Allocator_Alignment --
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123 ------------------------------------
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124
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125 function Get_System_Allocator_Alignment return Nat is
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126 begin
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127 return 1;
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128 end Get_System_Allocator_Alignment;
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129
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130 ------------------------
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131 -- Get_Float_Words_BE --
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132 ------------------------
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133
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134 function Get_Float_Words_BE return Nat is
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135 begin
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136 return 1;
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137 end Get_Float_Words_BE;
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138
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139 ------------------
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140 -- Get_Words_BE --
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141 ------------------
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142
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143 function Get_Words_BE return Nat is
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144 begin
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145 return 1;
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146 end Get_Words_BE;
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147
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148 ------------------
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149 -- Get_Bytes_BE --
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150 ------------------
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151
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152 function Get_Bytes_BE return Nat is
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153 begin
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154 return 1;
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155 end Get_Bytes_BE;
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156
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157 -----------------
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158 -- Get_Bits_BE --
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159 -----------------
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160
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161 function Get_Bits_BE return Nat is
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162 begin
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163 return 1;
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164 end Get_Bits_BE;
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165
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166 ---------------------
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167 -- Get_Short_Enums --
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168 ---------------------
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169
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170 function Get_Short_Enums return Int is
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171 begin
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172 return 0;
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173 end Get_Short_Enums;
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174
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175 --------------------------
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176 -- Get_Strict_Alignment --
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177 --------------------------
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178
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179 function Get_Strict_Alignment return Nat is
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180 begin
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181 return 1;
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182 end Get_Strict_Alignment;
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183
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184 --------------------------------
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185 -- Get_Double_Float_Alignment --
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186 --------------------------------
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187
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188 function Get_Double_Float_Alignment return Nat is
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189 begin
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190 return 0;
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191 end Get_Double_Float_Alignment;
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192
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193 ---------------------------------
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194 -- Get_Double_Scalar_Alignment --
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195 ---------------------------------
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196
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197 function Get_Double_Scalar_Alignment return Nat is
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198 begin
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199 return 0;
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200 end Get_Double_Scalar_Alignment;
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201
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202 -----------------------------
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203 -- Get_Max_Unaligned_Field --
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204 -----------------------------
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205
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206 function Get_Max_Unaligned_Field return Pos is
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207 begin
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208 return 64; -- Can be different on some targets (e.g., AAMP)
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209 end Get_Max_Unaligned_Field;
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210
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211 ----------------------
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212 -- Digits_From_Size --
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213 ----------------------
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214
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215 function Digits_From_Size (Size : Pos) return Pos is
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216 begin
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217 case Size is
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218 when 32 => return 6;
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219 when 48 => return 9;
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220 when 64 => return 15;
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221 when 96 => return 18;
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222 when 128 => return 18;
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223 when others => raise Program_Error;
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224 end case;
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225 end Digits_From_Size;
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226
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227 -----------------------------
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228 -- Register_Back_End_Types --
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229 -----------------------------
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230
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231 procedure Register_Back_End_Types (Call_Back : Register_Type_Proc) is
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232 Float_Str : C_String := (others => ASCII.NUL);
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233 Double_Str : C_String := (others => ASCII.NUL);
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234
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235 begin
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236 Float_Str (Float_Str'First .. Float_Str'First + 4) := "float";
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237 Call_Back
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238 (C_Name => Float_Str, Digs => 6, Complex => False, Count => 0,
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239 Float_Rep => IEEE_Binary,
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240 Precision => 32, Size => 32, Alignment => 32);
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241
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242 Double_Str (Double_Str'First .. Double_Str'First + 5) := "double";
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243 Call_Back
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244 (C_Name => Double_Str,
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245 Digs => 15,
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246 Complex => False,
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247 Count => 0,
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248 Float_Rep => IEEE_Binary,
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249 Precision => 64,
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250 Size => 64,
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251 Alignment => 64);
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252 end Register_Back_End_Types;
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253
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254 ---------------------
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255 -- Width_From_Size --
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256 ---------------------
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257
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258 function Width_From_Size (Size : Pos) return Pos is
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259 begin
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260 case Size is
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261 when 8 => return 4;
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262 when 16 => return 6;
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263 when 32 => return 11;
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264 when 64 => return 21;
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265 when others => raise Program_Error;
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266 end case;
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267 end Width_From_Size;
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268
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269 ------------------------------
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270 -- Get_Back_End_Config_File --
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271 ------------------------------
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272
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273 function Get_Back_End_Config_File return String_Ptr is
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274
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275 function Exec_Name return String;
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276 -- Return name of the current executable (from argv[0])
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277
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278 function Get_Target_File (Dir : String) return String_Ptr;
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279 -- Return Dir & "target.atp" if found, null otherwise
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280
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281 ---------------
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282 -- Exec_Name --
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283 ---------------
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284
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285 function Exec_Name return String is
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286 type Arg_Array is array (Nat) of Big_String_Ptr;
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287 type Arg_Array_Ptr is access all Arg_Array;
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288
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289 gnat_argv : Arg_Array_Ptr;
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290 pragma Import (C, gnat_argv);
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291
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292 begin
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293 for J in 1 .. Natural'Last loop
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294 if gnat_argv (0) (J) = ASCII.NUL then
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295 return gnat_argv (0) (1 .. J - 1);
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296 end if;
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297 end loop;
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298
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299 raise Program_Error;
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300 end Exec_Name;
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301
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302 ---------------------
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303 -- Get_Target_File --
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304 ---------------------
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305
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306 function Get_Target_File (Dir : String) return String_Ptr is
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307 F : constant String := Dir & "target.atp";
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308 begin
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309 if Is_Regular_File (F) then
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310 return new String'(F);
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311 else
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312 return null;
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313 end if;
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314 end Get_Target_File;
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315
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316 Exec : constant String := Exec_Name;
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317
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318 -- Start of processing for Get_Back_End_Config_File
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319
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320 begin
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321 if Is_Absolute_Path (Exec) then
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322 return Get_Target_File (Dir_Name (Exec));
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323 else
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324 return Get_Target_File (Dir_Name (Locate_Exec_On_Path (Exec).all));
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325 end if;
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326 end Get_Back_End_Config_File;
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327
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328 end Get_Targ;
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