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 #include "target.h"
  28 \f
  29
  30 /* Keep the vector keywords handy for fast comparisons.  */
  31 static GTY(()) tree __vector_keyword;
  32 static GTY(()) tree vector_keyword;
  33
  34 static cpp_hashnode *
  35 spu_categorize_keyword (const cpp_token *tok)
  36 {
  37   if (tok->type == CPP_NAME)
  38     {
  39       cpp_hashnode *ident = tok->val.node.node;
  40
  41       if (ident == C_CPP_HASHNODE (vector_keyword)
  42           || ident == C_CPP_HASHNODE (__vector_keyword))
  43         return C_CPP_HASHNODE (__vector_keyword);
  44       else
  45         return ident;
  46     }
  47   return 0;
  48 }
  49
  50 /* Called to decide whether a conditional macro should be expanded.
  51    Since we have exactly one such macro (i.e, 'vector'), we do not
  52    need to examine the 'tok' parameter.  */
  53
  54 static cpp_hashnode *
  55 spu_macro_to_expand (cpp_reader *pfile, const cpp_token *tok)
  56 {
  57   cpp_hashnode *expand_this = tok->val.node.node;
  58   cpp_hashnode *ident;
  59
  60   ident = spu_categorize_keyword (tok);
  61   if (ident == C_CPP_HASHNODE (__vector_keyword))
  62     {
  63       tok = cpp_peek_token (pfile, 0);
  64       ident = spu_categorize_keyword (tok);
  65
  66       if (ident)
  67         {
  68           enum rid rid_code = (enum rid)(ident->rid_code);
  69           if (ident->type == NT_MACRO)
  70             {
  71               (void) cpp_get_token (pfile);
  72               tok = cpp_peek_token (pfile, 0);
  73               ident = spu_categorize_keyword (tok);
  74               if (ident)
  75                 rid_code = (enum rid)(ident->rid_code);
  76             }
  77
  78           if (rid_code == RID_UNSIGNED || rid_code == RID_LONG
  79               || rid_code == RID_SHORT || rid_code == RID_SIGNED
  80               || rid_code == RID_INT || rid_code == RID_CHAR
  81               || rid_code == RID_FLOAT || rid_code == RID_DOUBLE)
  82             expand_this = C_CPP_HASHNODE (__vector_keyword);
  83         }
  84     }
  85   return expand_this;
  86 }
  87
  88 /* target hook for resolve_overloaded_builtin(). Returns a function call
  89    RTX if we can resolve the overloaded builtin */
  90 tree
  91 spu_resolve_overloaded_builtin (location_t loc, tree fndecl, void *passed_args)
  92 {
  93 #define SCALAR_TYPE_P(t) (INTEGRAL_TYPE_P (t) \
  94                           || SCALAR_FLOAT_TYPE_P (t) \
  95                           || POINTER_TYPE_P (t))
  96   vec<tree, va_gc> *fnargs = static_cast <vec<tree, va_gc> *> (passed_args);
  97   unsigned int nargs = vec_safe_length (fnargs);
  98   int new_fcode, fcode = DECL_FUNCTION_CODE (fndecl);
  99   struct spu_builtin_description *desc;
 100   tree match = NULL_TREE;
 101
 102   /* The vector types are not available if the backend is not initialized.  */
 103   gcc_assert (!flag_preprocess_only);
 104
 105   desc = &spu_builtins[fcode];
 106   if (desc->type != B_OVERLOAD)
 107     return NULL_TREE;
 108
 109   /* Compare the signature of each internal builtin function with the
 110      function arguments until a match is found. */
 111
 112   for (new_fcode = fcode + 1; spu_builtins[new_fcode].type == B_INTERNAL;
 113        new_fcode++)
 114     {
 115       tree decl = targetm.builtin_decl (new_fcode, true);
 116       tree params = TYPE_ARG_TYPES (TREE_TYPE (decl));
 117       tree param;
 118       bool all_scalar;
 119       unsigned int p;
 120
 121       /* Check whether all parameters are scalar.  */
 122       all_scalar = true;
 123       for (param = params; param != void_list_node; param = TREE_CHAIN (param))
 124       if (!SCALAR_TYPE_P (TREE_VALUE (param)))
 125         all_scalar = false;
 126
 127       for (param = params, p = 0;
 128            param != void_list_node;
 129            param = TREE_CHAIN (param), p++)
 130         {
 131           tree var, arg_type, param_type = TREE_VALUE (param);
 132
 133           if (p >= nargs)
 134             {
 135               error ("insufficient arguments to overloaded function %s",
 136                      desc->name);
 137               return error_mark_node;
 138             }
 139
 140           var = (*fnargs)[p];
 141
 142           if (TREE_CODE (var) == NON_LVALUE_EXPR)
 143             var = TREE_OPERAND (var, 0);
 144
 145           if (TREE_CODE (var) == ERROR_MARK)
 146             return NULL_TREE;   /* Let somebody else deal with the problem. */
 147
 148           arg_type = TREE_TYPE (var);
 149
 150           /* The intrinsics spec does not specify precisely how to
 151              resolve generic intrinsics.  We require an exact match
 152              for vector types and let C do it's usual parameter type
 153              checking/promotions for scalar arguments, except for the
 154              first argument of intrinsics which don't have a vector
 155              parameter. */
 156           if ((!SCALAR_TYPE_P (param_type)
 157                || !SCALAR_TYPE_P (arg_type)
 158                || (all_scalar && p == 0))
 159               && !lang_hooks.types_compatible_p (param_type, arg_type))
 160             break;
 161         }
 162       if (param == void_list_node)
 163         {
 164           if (p != nargs)
 165             {
 166               error ("too many arguments to overloaded function %s",
 167                      desc->name);
 168               return error_mark_node;
 169             }
 170
 171           match = decl;
 172           break;
 173         }
 174     }
 175
 176   if (match == NULL_TREE)
 177     {
 178       error ("parameter list does not match a valid signature for %s()",
 179              desc->name);
 180       return error_mark_node;
 181     }
 182
 183   return build_function_call_vec (loc, match, fnargs, NULL);
 184 #undef SCALAR_TYPE_P
 185 }
 186
 187
 188 void
 189 spu_cpu_cpp_builtins (struct cpp_reader *pfile)
 190 {
 191   cpp_define (pfile, "__SPU__");
 192   cpp_assert (pfile, "cpu=spu");
 193   cpp_assert (pfile, "machine=spu");
 194   if (spu_arch == PROCESSOR_CELLEDP)
 195     cpp_define (pfile, "__SPU_EDP__");
 196   cpp_define (pfile, "__vector=__attribute__((__spu_vector__))");
 197   switch (spu_ea_model)
 198     {
 199     case 32:
 200       cpp_define (pfile, "__EA32__");
 201       break;
 202     case 64:
 203       cpp_define (pfile, "__EA64__");
 204       break;
 205     default:
 206        gcc_unreachable ();
 207     }
 208
 209   if (!flag_iso)
 210     {
 211       /* Define this when supporting context-sensitive keywords.  */
 212       cpp_define (pfile, "__VECTOR_KEYWORD_SUPPORTED__");
 213       cpp_define (pfile, "vector=vector");
 214
 215       /* Initialize vector keywords.  */
 216       __vector_keyword = get_identifier ("__vector");
 217       C_CPP_HASHNODE (__vector_keyword)->flags |= NODE_CONDITIONAL;
 218       vector_keyword = get_identifier ("vector");
 219       C_CPP_HASHNODE (vector_keyword)->flags |= NODE_CONDITIONAL;
 220
 221       /* Enable context-sensitive macros.  */
 222       cpp_get_callbacks (pfile)->macro_to_expand = spu_macro_to_expand;
 223     }
 224 }
 225
 226 void
 227 spu_c_common_override_options (void)
 228 {
 229   if (!TARGET_STD_MAIN)
 230     {
 231       /* Don't give warnings about the main() function.  */
 232       warn_main = 0;
 233     }
 234 }