gcc/config/spu/spu-c.c

   1 /* Copyright (C) 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
   2
   3    This file is free software; you can redistribute it and/or modify it under
   4    the terms of the GNU General Public License as published by the Free
   5    Software Foundation; either version 3 of the License, or (at your option)
   6    any later version.
   7
   8    This file is distributed in the hope that it will be useful, but WITHOUT
   9    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  11    for more details.
  12
  13    You should have received a copy of the GNU General Public License
  14    along with GCC; see the file COPYING3.  If not see
  15    <http://www.gnu.org/licenses/>.  */
  16
  17 #include "config.h"
  18 #include "system.h"
  19 #include "coretypes.h"
  20 #include "tm.h"
  21 #include "cpplib.h"
  22 #include "tree.h"
  23 #include "c-family/c-common.h"
  24 #include "c-family/c-pragma.h"
  25 #include "tm_p.h"
  26 #include "langhooks.h"
  27 \f
  28
  29 /* Keep the vector keywords handy for fast comparisons.  */
  30 static GTY(()) tree __vector_keyword;
  31 static GTY(()) tree vector_keyword;
  32
  33 static cpp_hashnode *
  34 spu_categorize_keyword (const cpp_token *tok)
  35 {
  36   if (tok->type == CPP_NAME)
  37     {
  38       cpp_hashnode *ident = tok->val.node.node;
  39
  40       if (ident == C_CPP_HASHNODE (vector_keyword)
  41           || ident == C_CPP_HASHNODE (__vector_keyword))
  42         return C_CPP_HASHNODE (__vector_keyword);
  43       else
  44         return ident;
  45     }
  46   return 0;
  47 }
  48
  49 /* Called to decide whether a conditional macro should be expanded.
  50    Since we have exactly one such macro (i.e, 'vector'), we do not
  51    need to examine the 'tok' parameter.  */
  52
  53 static cpp_hashnode *
  54 spu_macro_to_expand (cpp_reader *pfile, const cpp_token *tok)
  55 {
  56   cpp_hashnode *expand_this = tok->val.node.node;
  57   cpp_hashnode *ident;
  58
  59   ident = spu_categorize_keyword (tok);
  60   if (ident == C_CPP_HASHNODE (__vector_keyword))
  61     {
  62       tok = cpp_peek_token (pfile, 0);
  63       ident = spu_categorize_keyword (tok);
  64
  65       if (ident)
  66         {
  67           enum rid rid_code = (enum rid)(ident->rid_code);
  68           if (ident->type == NT_MACRO)
  69             {
  70               (void) cpp_get_token (pfile);
  71               tok = cpp_peek_token (pfile, 0);
  72               ident = spu_categorize_keyword (tok);
  73               if (ident)
  74                 rid_code = (enum rid)(ident->rid_code);
  75             }
  76
  77           if (rid_code == RID_UNSIGNED || rid_code == RID_LONG
  78               || rid_code == RID_SHORT || rid_code == RID_SIGNED
  79               || rid_code == RID_INT || rid_code == RID_CHAR
  80               || rid_code == RID_FLOAT || rid_code == RID_DOUBLE)
  81             expand_this = C_CPP_HASHNODE (__vector_keyword);
  82         }
  83     }
  84   return expand_this;
  85 }
  86
  87 /* target hook for resolve_overloaded_builtin(). Returns a function call
  88    RTX if we can resolve the overloaded builtin */
  89 tree
  90 spu_resolve_overloaded_builtin (location_t loc, tree fndecl, void *passed_args)
  91 {
  92 #define SCALAR_TYPE_P(t) (INTEGRAL_TYPE_P (t) \
  93                           || SCALAR_FLOAT_TYPE_P (t) \
  94                           || POINTER_TYPE_P (t))
  95   VEC(tree,gc) *fnargs = (VEC(tree,gc) *) passed_args;
  96   unsigned int nargs = VEC_length (tree, fnargs);
  97   int new_fcode, fcode = DECL_FUNCTION_CODE (fndecl) - END_BUILTINS;
  98   struct spu_builtin_description *desc;
  99   tree match = NULL_TREE;
 100
 101   /* The vector types are not available if the backend is not initialized.  */
 102   gcc_assert (!flag_preprocess_only);
 103
 104   desc = &spu_builtins[fcode];
 105   if (desc->type != B_OVERLOAD)
 106     return NULL_TREE;
 107
 108   /* Compare the signature of each internal builtin function with the
 109      function arguments until a match is found. */
 110
 111   for (new_fcode = fcode + 1; spu_builtins[new_fcode].type == B_INTERNAL;
 112        new_fcode++)
 113     {
 114       tree decl = spu_builtins[new_fcode].fndecl;
 115       tree params = TYPE_ARG_TYPES (TREE_TYPE (decl));
 116       tree param;
 117       bool all_scalar;
 118       unsigned int p;
 119
 120       /* Check whether all parameters are scalar.  */
 121       all_scalar = true;
 122       for (param = params; param != void_list_node; param = TREE_CHAIN (param))
 123       if (!SCALAR_TYPE_P (TREE_VALUE (param)))
 124         all_scalar = false;
 125
 126       for (param = params, p = 0;
 127            param != void_list_node;
 128            param = TREE_CHAIN (param), p++)
 129         {
 130           tree var, arg_type, param_type = TREE_VALUE (param);
 131
 132           if (p >= nargs)
 133             {
 134               error ("insufficient arguments to overloaded function %s",
 135                      desc->name);
 136               return error_mark_node;
 137             }
 138
 139           var = VEC_index (tree, fnargs, p);
 140
 141           if (TREE_CODE (var) == NON_LVALUE_EXPR)
 142             var = TREE_OPERAND (var, 0);
 143
 144           if (TREE_CODE (var) == ERROR_MARK)
 145             return NULL_TREE;   /* Let somebody else deal with the problem. */
 146
 147           arg_type = TREE_TYPE (var);
 148
 149           /* The intrinsics spec does not specify precisely how to
 150              resolve generic intrinsics.  We require an exact match
 151              for vector types and let C do it's usual parameter type
 152              checking/promotions for scalar arguments, except for the
 153              first argument of intrinsics which don't have a vector
 154              parameter. */
 155           if ((!SCALAR_TYPE_P (param_type)
 156                || !SCALAR_TYPE_P (arg_type)
 157                || (all_scalar && p == 0))
 158               && !lang_hooks.types_compatible_p (param_type, arg_type))
 159             break;
 160         }
 161       if (param == void_list_node)
 162         {
 163           if (p != nargs)
 164             {
 165               error ("too many arguments to overloaded function %s",
 166                      desc->name);
 167               return error_mark_node;
 168             }
 169
 170           match = decl;
 171           break;
 172         }
 173     }
 174
 175   if (match == NULL_TREE)
 176     {
 177       error ("parameter list does not match a valid signature for %s()",
 178              desc->name);
 179       return error_mark_node;
 180     }
 181
 182   return build_function_call_vec (loc, match, fnargs, NULL);
 183 #undef SCALAR_TYPE_P
 184 }
 185
 186
 187 void
 188 spu_cpu_cpp_builtins (struct cpp_reader *pfile)
 189 {
 190   builtin_define_std ("__SPU__");
 191   cpp_assert (pfile, "cpu=spu");
 192   cpp_assert (pfile, "machine=spu");
 193   if (spu_arch == PROCESSOR_CELLEDP)
 194     builtin_define_std ("__SPU_EDP__");
 195   builtin_define_std ("__vector=__attribute__((__spu_vector__))");
 196   switch (spu_ea_model)
 197     {
 198     case 32:
 199       builtin_define_std ("__EA32__");
 200       break;
 201     case 64:
 202       builtin_define_std ("__EA64__");
 203       break;
 204     default:
 205        gcc_unreachable ();
 206     }
 207
 208   if (!flag_iso)
 209     {
 210       /* Define this when supporting context-sensitive keywords.  */
 211       cpp_define (pfile, "__VECTOR_KEYWORD_SUPPORTED__");
 212       cpp_define (pfile, "vector=vector");
 213
 214       /* Initialize vector keywords.  */
 215       __vector_keyword = get_identifier ("__vector");
 216       C_CPP_HASHNODE (__vector_keyword)->flags |= NODE_CONDITIONAL;
 217       vector_keyword = get_identifier ("vector");
 218       C_CPP_HASHNODE (vector_keyword)->flags |= NODE_CONDITIONAL;
 219
 220       /* Enable context-sensitive macros.  */
 221       cpp_get_callbacks (pfile)->macro_to_expand = spu_macro_to_expand;
 222     }
 223 }
 224
 225 void
 226 spu_c_common_override_options (void)
 227 {
 228   if (!TARGET_STD_MAIN)
 229     {
 230       /* Don't give warnings about the main() function.  */
 231       warn_main = 0;
 232     }
 233 }