gcc/config/spu/spu-c.c

   1 /* Copyright (C) 2006-2017 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 "target.h"
  21 #include "c-family/c-common.h"
  22 #include "stringpool.h"
  23 #include "langhooks.h"
  24 \f
  25
  26 /* Keep the vector keywords handy for fast comparisons.  */
  27 static GTY(()) tree __vector_keyword;
  28 static GTY(()) tree vector_keyword;
  29
  30 static cpp_hashnode *
  31 spu_categorize_keyword (const cpp_token *tok)
  32 {
  33   if (tok->type == CPP_NAME)
  34     {
  35       cpp_hashnode *ident = tok->val.node.node;
  36
  37       if (ident == C_CPP_HASHNODE (vector_keyword)
  38           || ident == C_CPP_HASHNODE (__vector_keyword))
  39         return C_CPP_HASHNODE (__vector_keyword);
  40       else
  41         return ident;
  42     }
  43   return 0;
  44 }
  45
  46 /* Called to decide whether a conditional macro should be expanded.
  47    Since we have exactly one such macro (i.e, 'vector'), we do not
  48    need to examine the 'tok' parameter.  */
  49
  50 static cpp_hashnode *
  51 spu_macro_to_expand (cpp_reader *pfile, const cpp_token *tok)
  52 {
  53   cpp_hashnode *expand_this = tok->val.node.node;
  54   cpp_hashnode *ident;
  55
  56   ident = spu_categorize_keyword (tok);
  57   if (ident == C_CPP_HASHNODE (__vector_keyword))
  58     {
  59       tok = cpp_peek_token (pfile, 0);
  60       ident = spu_categorize_keyword (tok);
  61
  62       if (ident)
  63         {
  64           enum rid rid_code = (enum rid)(ident->rid_code);
  65           if (ident->type == NT_MACRO)
  66             {
  67               (void) cpp_get_token (pfile);
  68               tok = cpp_peek_token (pfile, 0);
  69               ident = spu_categorize_keyword (tok);
  70               if (ident)
  71                 rid_code = (enum rid)(ident->rid_code);
  72             }
  73
  74           if (rid_code == RID_UNSIGNED || rid_code == RID_LONG
  75               || rid_code == RID_SHORT || rid_code == RID_SIGNED
  76               || rid_code == RID_INT || rid_code == RID_CHAR
  77               || rid_code == RID_FLOAT || rid_code == RID_DOUBLE)
  78             expand_this = C_CPP_HASHNODE (__vector_keyword);
  79         }
  80     }
  81   return expand_this;
  82 }
  83
  84 /* target hook for resolve_overloaded_builtin(). Returns a function call
  85    RTX if we can resolve the overloaded builtin */
  86 tree
  87 spu_resolve_overloaded_builtin (location_t loc, tree fndecl, void *passed_args)
  88 {
  89 #define SCALAR_TYPE_P(t) (INTEGRAL_TYPE_P (t) \
  90                           || SCALAR_FLOAT_TYPE_P (t) \
  91                           || POINTER_TYPE_P (t))
  92   vec<tree, va_gc> *fnargs = static_cast <vec<tree, va_gc> *> (passed_args);
  93   unsigned int nargs = vec_safe_length (fnargs);
  94   int new_fcode, fcode = DECL_FUNCTION_CODE (fndecl);
  95   struct spu_builtin_description *desc;
  96   tree match = NULL_TREE;
  97
  98   /* The vector types are not available if the backend is not initialized.  */
  99   gcc_assert (!flag_preprocess_only);
 100
 101   desc = &spu_builtins[fcode];
 102   if (desc->type != B_OVERLOAD)
 103     return NULL_TREE;
 104
 105   /* Compare the signature of each internal builtin function with the
 106      function arguments until a match is found. */
 107
 108   for (new_fcode = fcode + 1; spu_builtins[new_fcode].type == B_INTERNAL;
 109        new_fcode++)
 110     {
 111       tree decl = targetm.builtin_decl (new_fcode, true);
 112       tree params = TYPE_ARG_TYPES (TREE_TYPE (decl));
 113       tree param;
 114       bool all_scalar;
 115       unsigned int p;
 116
 117       /* Check whether all parameters are scalar.  */
 118       all_scalar = true;
 119       for (param = params; param != void_list_node; param = TREE_CHAIN (param))
 120       if (!SCALAR_TYPE_P (TREE_VALUE (param)))
 121         all_scalar = false;
 122
 123       for (param = params, p = 0;
 124            param != void_list_node;
 125            param = TREE_CHAIN (param), p++)
 126         {
 127           tree var, arg_type, param_type = TREE_VALUE (param);
 128
 129           if (p >= nargs)
 130             {
 131               error ("insufficient arguments to overloaded function %s",
 132                      desc->name);
 133               return error_mark_node;
 134             }
 135
 136           var = (*fnargs)[p];
 137
 138           if (TREE_CODE (var) == NON_LVALUE_EXPR)
 139             var = TREE_OPERAND (var, 0);
 140
 141           if (TREE_CODE (var) == ERROR_MARK)
 142             return NULL_TREE;   /* Let somebody else deal with the problem. */
 143
 144           arg_type = TREE_TYPE (var);
 145
 146           /* The intrinsics spec does not specify precisely how to
 147              resolve generic intrinsics.  We require an exact match
 148              for vector types and let C do it's usual parameter type
 149              checking/promotions for scalar arguments, except for the
 150              first argument of intrinsics which don't have a vector
 151              parameter. */
 152           if ((!SCALAR_TYPE_P (param_type)
 153                || !SCALAR_TYPE_P (arg_type)
 154                || (all_scalar && p == 0))
 155               && !lang_hooks.types_compatible_p (param_type, arg_type))
 156             break;
 157         }
 158       if (param == void_list_node)
 159         {
 160           if (p != nargs)
 161             {
 162               error ("too many arguments to overloaded function %s",
 163                      desc->name);
 164               return error_mark_node;
 165             }
 166
 167           match = decl;
 168           break;
 169         }
 170     }
 171
 172   if (match == NULL_TREE)
 173     {
 174       error ("parameter list does not match a valid signature for %s()",
 175              desc->name);
 176       return error_mark_node;
 177     }
 178
 179   return build_function_call_vec (loc, vNULL, match, fnargs, NULL);
 180 #undef SCALAR_TYPE_P
 181 }
 182
 183
 184 void
 185 spu_cpu_cpp_builtins (struct cpp_reader *pfile)
 186 {
 187   cpp_define (pfile, "__SPU__");
 188   cpp_assert (pfile, "cpu=spu");
 189   cpp_assert (pfile, "machine=spu");
 190   if (spu_arch == PROCESSOR_CELLEDP)
 191     cpp_define (pfile, "__SPU_EDP__");
 192   if (cpp_get_options (pfile)->lang != CLK_ASM)
 193     cpp_define (pfile, "__vector=__attribute__((__spu_vector__))");
 194   switch (spu_ea_model)
 195     {
 196     case 32:
 197       cpp_define (pfile, "__EA32__");
 198       break;
 199     case 64:
 200       cpp_define (pfile, "__EA64__");
 201       break;
 202     default:
 203        gcc_unreachable ();
 204     }
 205
 206   if (!flag_iso && cpp_get_options (pfile)->lang != CLK_ASM)
 207     {
 208       /* Define this when supporting context-sensitive keywords.  */
 209       cpp_define (pfile, "__VECTOR_KEYWORD_SUPPORTED__");
 210       cpp_define (pfile, "vector=vector");
 211
 212       /* Initialize vector keywords.  */
 213       __vector_keyword = get_identifier ("__vector");
 214       C_CPP_HASHNODE (__vector_keyword)->flags |= NODE_CONDITIONAL;
 215       vector_keyword = get_identifier ("vector");
 216       C_CPP_HASHNODE (vector_keyword)->flags |= NODE_CONDITIONAL;
 217
 218       /* Enable context-sensitive macros.  */
 219       cpp_get_callbacks (pfile)->macro_to_expand = spu_macro_to_expand;
 220     }
 221 }
 222
 223 void
 224 spu_c_common_override_options (void)
 225 {
 226   if (!TARGET_STD_MAIN)
 227     {
 228       /* Don't give warnings about the main() function.  */
 229       warn_main = 0;
 230     }
 231 }