gcc/config/spu/spu-c.c

   1 /* Copyright (C) 2006-2014 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 "stringpool.h"
  24 #include "c-family/c-common.h"
  25 #include "c-family/c-pragma.h"
  26 #include "tm_p.h"
  27 #include "langhooks.h"
  28 #include "target.h"
  29 \f
  30
  31 /* Keep the vector keywords handy for fast comparisons.  */
  32 static GTY(()) tree __vector_keyword;
  33 static GTY(()) tree vector_keyword;
  34
  35 static cpp_hashnode *
  36 spu_categorize_keyword (const cpp_token *tok)
  37 {
  38   if (tok->type == CPP_NAME)
  39     {
  40       cpp_hashnode *ident = tok->val.node.node;
  41
  42       if (ident == C_CPP_HASHNODE (vector_keyword)
  43           || ident == C_CPP_HASHNODE (__vector_keyword))
  44         return C_CPP_HASHNODE (__vector_keyword);
  45       else
  46         return ident;
  47     }
  48   return 0;
  49 }
  50
  51 /* Called to decide whether a conditional macro should be expanded.
  52    Since we have exactly one such macro (i.e, 'vector'), we do not
  53    need to examine the 'tok' parameter.  */
  54
  55 static cpp_hashnode *
  56 spu_macro_to_expand (cpp_reader *pfile, const cpp_token *tok)
  57 {
  58   cpp_hashnode *expand_this = tok->val.node.node;
  59   cpp_hashnode *ident;
  60
  61   ident = spu_categorize_keyword (tok);
  62   if (ident == C_CPP_HASHNODE (__vector_keyword))
  63     {
  64       tok = cpp_peek_token (pfile, 0);
  65       ident = spu_categorize_keyword (tok);
  66
  67       if (ident)
  68         {
  69           enum rid rid_code = (enum rid)(ident->rid_code);
  70           if (ident->type == NT_MACRO)
  71             {
  72               (void) cpp_get_token (pfile);
  73               tok = cpp_peek_token (pfile, 0);
  74               ident = spu_categorize_keyword (tok);
  75               if (ident)
  76                 rid_code = (enum rid)(ident->rid_code);
  77             }
  78
  79           if (rid_code == RID_UNSIGNED || rid_code == RID_LONG
  80               || rid_code == RID_SHORT || rid_code == RID_SIGNED
  81               || rid_code == RID_INT || rid_code == RID_CHAR
  82               || rid_code == RID_FLOAT || rid_code == RID_DOUBLE)
  83             expand_this = C_CPP_HASHNODE (__vector_keyword);
  84         }
  85     }
  86   return expand_this;
  87 }
  88
  89 /* target hook for resolve_overloaded_builtin(). Returns a function call
  90    RTX if we can resolve the overloaded builtin */
  91 tree
  92 spu_resolve_overloaded_builtin (location_t loc, tree fndecl, void *passed_args)
  93 {
  94 #define SCALAR_TYPE_P(t) (INTEGRAL_TYPE_P (t) \
  95                           || SCALAR_FLOAT_TYPE_P (t) \
  96                           || POINTER_TYPE_P (t))
  97   vec<tree, va_gc> *fnargs = static_cast <vec<tree, va_gc> *> (passed_args);
  98   unsigned int nargs = vec_safe_length (fnargs);
  99   int new_fcode, fcode = DECL_FUNCTION_CODE (fndecl);
 100   struct spu_builtin_description *desc;
 101   tree match = NULL_TREE;
 102
 103   /* The vector types are not available if the backend is not initialized.  */
 104   gcc_assert (!flag_preprocess_only);
 105
 106   desc = &spu_builtins[fcode];
 107   if (desc->type != B_OVERLOAD)
 108     return NULL_TREE;
 109
 110   /* Compare the signature of each internal builtin function with the
 111      function arguments until a match is found. */
 112
 113   for (new_fcode = fcode + 1; spu_builtins[new_fcode].type == B_INTERNAL;
 114        new_fcode++)
 115     {
 116       tree decl = targetm.builtin_decl (new_fcode, true);
 117       tree params = TYPE_ARG_TYPES (TREE_TYPE (decl));
 118       tree param;
 119       bool all_scalar;
 120       unsigned int p;
 121
 122       /* Check whether all parameters are scalar.  */
 123       all_scalar = true;
 124       for (param = params; param != void_list_node; param = TREE_CHAIN (param))
 125       if (!SCALAR_TYPE_P (TREE_VALUE (param)))
 126         all_scalar = false;
 127
 128       for (param = params, p = 0;
 129            param != void_list_node;
 130            param = TREE_CHAIN (param), p++)
 131         {
 132           tree var, arg_type, param_type = TREE_VALUE (param);
 133
 134           if (p >= nargs)
 135             {
 136               error ("insufficient arguments to overloaded function %s",
 137                      desc->name);
 138               return error_mark_node;
 139             }
 140
 141           var = (*fnargs)[p];
 142
 143           if (TREE_CODE (var) == NON_LVALUE_EXPR)
 144             var = TREE_OPERAND (var, 0);
 145
 146           if (TREE_CODE (var) == ERROR_MARK)
 147             return NULL_TREE;   /* Let somebody else deal with the problem. */
 148
 149           arg_type = TREE_TYPE (var);
 150
 151           /* The intrinsics spec does not specify precisely how to
 152              resolve generic intrinsics.  We require an exact match
 153              for vector types and let C do it's usual parameter type
 154              checking/promotions for scalar arguments, except for the
 155              first argument of intrinsics which don't have a vector
 156              parameter. */
 157           if ((!SCALAR_TYPE_P (param_type)
 158                || !SCALAR_TYPE_P (arg_type)
 159                || (all_scalar && p == 0))
 160               && !lang_hooks.types_compatible_p (param_type, arg_type))
 161             break;
 162         }
 163       if (param == void_list_node)
 164         {
 165           if (p != nargs)
 166             {
 167               error ("too many arguments to overloaded function %s",
 168                      desc->name);
 169               return error_mark_node;
 170             }
 171
 172           match = decl;
 173           break;
 174         }
 175     }
 176
 177   if (match == NULL_TREE)
 178     {
 179       error ("parameter list does not match a valid signature for %s()",
 180              desc->name);
 181       return error_mark_node;
 182     }
 183
 184   return build_function_call_vec (loc, vNULL, match, fnargs, NULL);
 185 #undef SCALAR_TYPE_P
 186 }
 187
 188
 189 void
 190 spu_cpu_cpp_builtins (struct cpp_reader *pfile)
 191 {
 192   cpp_define (pfile, "__SPU__");
 193   cpp_assert (pfile, "cpu=spu");
 194   cpp_assert (pfile, "machine=spu");
 195   if (spu_arch == PROCESSOR_CELLEDP)
 196     cpp_define (pfile, "__SPU_EDP__");
 197   cpp_define (pfile, "__vector=__attribute__((__spu_vector__))");
 198   switch (spu_ea_model)
 199     {
 200     case 32:
 201       cpp_define (pfile, "__EA32__");
 202       break;
 203     case 64:
 204       cpp_define (pfile, "__EA64__");
 205       break;
 206     default:
 207        gcc_unreachable ();
 208     }
 209
 210   if (!flag_iso)
 211     {
 212       /* Define this when supporting context-sensitive keywords.  */
 213       cpp_define (pfile, "__VECTOR_KEYWORD_SUPPORTED__");
 214       cpp_define (pfile, "vector=vector");
 215
 216       /* Initialize vector keywords.  */
 217       __vector_keyword = get_identifier ("__vector");
 218       C_CPP_HASHNODE (__vector_keyword)->flags |= NODE_CONDITIONAL;
 219       vector_keyword = get_identifier ("vector");
 220       C_CPP_HASHNODE (vector_keyword)->flags |= NODE_CONDITIONAL;
 221
 222       /* Enable context-sensitive macros.  */
 223       cpp_get_callbacks (pfile)->macro_to_expand = spu_macro_to_expand;
 224     }
 225 }
 226
 227 void
 228 spu_c_common_override_options (void)
 229 {
 230   if (!TARGET_STD_MAIN)
 231     {
 232       /* Don't give warnings about the main() function.  */
 233       warn_main = 0;
 234     }
 235 }