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1 /* Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
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2
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3 This file is free software; you can redistribute it and/or modify it under
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4 the terms of the GNU General Public License as published by the Free
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5 Software Foundation; either version 3 of the License, or (at your option)
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6 any later version.
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7
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8 This file is distributed in the hope that it will be useful, but WITHOUT
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9 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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10 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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11 for more details.
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12
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13 You should have received a copy of the GNU General Public License
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14 along with GCC; see the file COPYING3. If not see
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15 <http://www.gnu.org/licenses/>. */
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16
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17 #include "config.h"
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18 #include "system.h"
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19 #include "coretypes.h"
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20 #include "tm.h"
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21 #include "cpplib.h"
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22 #include "tree.h"
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23 #include "c-tree.h"
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24 #include "c-pragma.h"
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25 #include "function.h"
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26 #include "rtl.h"
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27 #include "expr.h"
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28 #include "errors.h"
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29 #include "tm_p.h"
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30 #include "langhooks.h"
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31 #include "insn-config.h"
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32 #include "insn-codes.h"
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33 #include "recog.h"
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34 #include "optabs.h"
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35 #include "spu-builtins.h"
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36
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37
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38 /* Keep the vector keywords handy for fast comparisons. */
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39 static GTY(()) tree __vector_keyword;
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40 static GTY(()) tree vector_keyword;
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41
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42 static cpp_hashnode *
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43 spu_categorize_keyword (const cpp_token *tok)
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44 {
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45 if (tok->type == CPP_NAME)
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46 {
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47 cpp_hashnode *ident = tok->val.node;
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48
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49 if (ident == C_CPP_HASHNODE (vector_keyword)
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50 || ident == C_CPP_HASHNODE (__vector_keyword))
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51 return C_CPP_HASHNODE (__vector_keyword);
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52 else
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53 return ident;
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54 }
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55 return 0;
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56 }
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57
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58 /* Called to decide whether a conditional macro should be expanded.
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59 Since we have exactly one such macro (i.e, 'vector'), we do not
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60 need to examine the 'tok' parameter. */
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61
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62 static cpp_hashnode *
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63 spu_macro_to_expand (cpp_reader *pfile, const cpp_token *tok)
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64 {
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65 cpp_hashnode *expand_this = tok->val.node;
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66 cpp_hashnode *ident;
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67
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68 ident = spu_categorize_keyword (tok);
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69 if (ident == C_CPP_HASHNODE (__vector_keyword))
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70 {
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71 tok = cpp_peek_token (pfile, 0);
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72 ident = spu_categorize_keyword (tok);
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73
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74 if (ident)
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75 {
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76 enum rid rid_code = (enum rid)(ident->rid_code);
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77 if (ident->type == NT_MACRO)
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78 {
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79 (void) cpp_get_token (pfile);
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80 tok = cpp_peek_token (pfile, 0);
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81 ident = spu_categorize_keyword (tok);
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82 if (ident)
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83 rid_code = (enum rid)(ident->rid_code);
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84 }
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85
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86 if (rid_code == RID_UNSIGNED || rid_code == RID_LONG
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87 || rid_code == RID_SHORT || rid_code == RID_SIGNED
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88 || rid_code == RID_INT || rid_code == RID_CHAR
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89 || rid_code == RID_FLOAT || rid_code == RID_DOUBLE)
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90 expand_this = C_CPP_HASHNODE (__vector_keyword);
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91 }
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92 }
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93 return expand_this;
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94 }
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95
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96 /* target hook for resolve_overloaded_builtin(). Returns a function call
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97 RTX if we can resolve the overloaded builtin */
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98 tree
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99 spu_resolve_overloaded_builtin (tree fndecl, tree fnargs)
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100 {
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101 #define SCALAR_TYPE_P(t) (INTEGRAL_TYPE_P (t) \
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102 || SCALAR_FLOAT_TYPE_P (t) \
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103 || POINTER_TYPE_P (t))
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104 spu_function_code new_fcode, fcode =
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105 DECL_FUNCTION_CODE (fndecl) - END_BUILTINS;
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106 struct spu_builtin_description *desc;
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107 tree match = NULL_TREE;
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108
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109 /* The vector types are not available if the backend is not initialized. */
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110 gcc_assert (!flag_preprocess_only);
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111
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112 desc = &spu_builtins[fcode];
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113 if (desc->type != B_OVERLOAD)
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114 return NULL_TREE;
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115
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116 /* Compare the signature of each internal builtin function with the
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117 function arguments until a match is found. */
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118
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119 for (new_fcode = fcode + 1; spu_builtins[new_fcode].type == B_INTERNAL;
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120 new_fcode++)
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121 {
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122 tree decl = spu_builtins[new_fcode].fndecl;
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123 tree params = TYPE_ARG_TYPES (TREE_TYPE (decl));
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124 tree arg, param;
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125 int p;
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126
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127 for (param = params, arg = fnargs, p = 0;
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128 param != void_list_node;
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129 param = TREE_CHAIN (param), arg = TREE_CHAIN (arg), p++)
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130 {
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131 tree var, arg_type, param_type = TREE_VALUE (param);
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132
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133 if (!arg)
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134 {
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135 error ("insufficient arguments to overloaded function %s",
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136 desc->name);
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137 return error_mark_node;
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138 }
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139
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140 var = TREE_VALUE (arg);
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141
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142 if (TREE_CODE (var) == NON_LVALUE_EXPR)
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143 var = TREE_OPERAND (var, 0);
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144
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145 if (TREE_CODE (var) == ERROR_MARK)
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146 return NULL_TREE; /* Let somebody else deal with the problem. */
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147
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148 arg_type = TREE_TYPE (var);
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149
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150 /* The intrinsics spec does not specify precisely how to
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151 resolve generic intrinsics. We require an exact match
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152 for vector types and let C do it's usual parameter type
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153 checking/promotions for scalar arguments, except for the
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154 first argument of intrinsics which don't have a vector
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155 parameter. */
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156 if ((!SCALAR_TYPE_P (param_type)
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157 || !SCALAR_TYPE_P (arg_type)
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158 || ((fcode == SPU_SPLATS || fcode == SPU_PROMOTE
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159 || fcode == SPU_HCMPEQ || fcode == SPU_HCMPGT
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160 || fcode == SPU_MASKB || fcode == SPU_MASKH
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161 || fcode == SPU_MASKW) && p == 0))
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162 && !comptypes (TYPE_MAIN_VARIANT (param_type),
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163 TYPE_MAIN_VARIANT (arg_type)))
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164 break;
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165 }
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166 if (param == void_list_node)
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167 {
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168 if (arg)
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169 {
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170 error ("too many arguments to overloaded function %s",
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171 desc->name);
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172 return error_mark_node;
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173 }
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174
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175 match = decl;
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176 break;
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177 }
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178 }
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179
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180 if (match == NULL_TREE)
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181 {
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182 error ("parameter list does not match a valid signature for %s()",
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183 desc->name);
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184 return error_mark_node;
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185 }
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186
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187 return build_function_call (match, fnargs);
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188 #undef SCALAR_TYPE_P
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189 }
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190
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191
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192 void
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193 spu_cpu_cpp_builtins (struct cpp_reader *pfile)
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194 {
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195 builtin_define_std ("__SPU__");
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196 cpp_assert (pfile, "cpu=spu");
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197 cpp_assert (pfile, "machine=spu");
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198 if (spu_arch == PROCESSOR_CELLEDP)
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199 builtin_define_std ("__SPU_EDP__");
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200 builtin_define_std ("__vector=__attribute__((__spu_vector__))");
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201
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202 if (!flag_iso)
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203 {
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204 /* Define this when supporting context-sensitive keywords. */
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205 cpp_define (pfile, "__VECTOR_KEYWORD_SUPPORTED__");
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206 cpp_define (pfile, "vector=vector");
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207
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208 /* Initialize vector keywords. */
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209 __vector_keyword = get_identifier ("__vector");
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210 C_CPP_HASHNODE (__vector_keyword)->flags |= NODE_CONDITIONAL;
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211 vector_keyword = get_identifier ("vector");
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212 C_CPP_HASHNODE (vector_keyword)->flags |= NODE_CONDITIONAL;
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213
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214 /* Enable context-sensitive macros. */
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215 cpp_get_callbacks (pfile)->macro_to_expand = spu_macro_to_expand;
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216 }
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217 }
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218
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219 void
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220 spu_c_common_override_options (void)
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221 {
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222 if (!TARGET_STD_MAIN)
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223 {
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224 /* Don't give warnings about the main() function. */
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225 warn_main = 0;
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226 }
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227 }
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