gcc/config/spu/spu-c.c

   1 /* Copyright (C) 2006-2018 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 #define IN_TARGET_CODE 1
  18
  19 #include "config.h"
  20 #include "system.h"
  21 #include "coretypes.h"
  22 #include "target.h"
  23 #include "c-family/c-common.h"
  24 #include "stringpool.h"
  25 #include "langhooks.h"
  26 \f
  27
  28 /* Keep the vector keywords handy for fast comparisons.  */
  29 static GTY(()) tree __vector_keyword;
  30 static GTY(()) tree vector_keyword;
  31
  32 static cpp_hashnode *
  33 spu_categorize_keyword (const cpp_token *tok)
  34 {
  35   if (tok->type == CPP_NAME)
  36     {
  37       cpp_hashnode *ident = tok->val.node.node;
  38
  39       if (ident == C_CPP_HASHNODE (vector_keyword)
  40           || ident == C_CPP_HASHNODE (__vector_keyword))
  41         return C_CPP_HASHNODE (__vector_keyword);
  42       else
  43         return ident;
  44     }
  45   return 0;
  46 }
  47
  48 /* Called to decide whether a conditional macro should be expanded.
  49    Since we have exactly one such macro (i.e, 'vector'), we do not
  50    need to examine the 'tok' parameter.  */
  51
  52 static cpp_hashnode *
  53 spu_macro_to_expand (cpp_reader *pfile, const cpp_token *tok)
  54 {
  55   cpp_hashnode *expand_this = tok->val.node.node;
  56   cpp_hashnode *ident;
  57
  58   ident = spu_categorize_keyword (tok);
  59   if (ident == C_CPP_HASHNODE (__vector_keyword))
  60     {
  61       tok = cpp_peek_token (pfile, 0);
  62       ident = spu_categorize_keyword (tok);
  63
  64       if (ident)
  65         {
  66           enum rid rid_code = (enum rid)(ident->rid_code);
  67           if (cpp_macro_p (ident))
  68             {
  69               (void) cpp_get_token (pfile);
  70               tok = cpp_peek_token (pfile, 0);
  71               ident = spu_categorize_keyword (tok);
  72               if (ident)
  73                 rid_code = (enum rid)(ident->rid_code);
  74             }
  75
  76           if (rid_code == RID_UNSIGNED || rid_code == RID_LONG
  77               || rid_code == RID_SHORT || rid_code == RID_SIGNED
  78               || rid_code == RID_INT || rid_code == RID_CHAR
  79               || rid_code == RID_FLOAT || rid_code == RID_DOUBLE)
  80             expand_this = C_CPP_HASHNODE (__vector_keyword);
  81         }
  82     }
  83   return expand_this;
  84 }
  85
  86 /* target hook for resolve_overloaded_builtin(). Returns a function call
  87    RTX if we can resolve the overloaded builtin */
  88 tree
  89 spu_resolve_overloaded_builtin (location_t loc, tree fndecl, void *passed_args)
  90 {
  91 #define SCALAR_TYPE_P(t) (INTEGRAL_TYPE_P (t) \
  92                           || SCALAR_FLOAT_TYPE_P (t) \
  93                           || POINTER_TYPE_P (t))
  94   vec<tree, va_gc> *fnargs = static_cast <vec<tree, va_gc> *> (passed_args);
  95   unsigned int nargs = vec_safe_length (fnargs);
  96   int new_fcode, fcode = DECL_FUNCTION_CODE (fndecl);
  97   struct spu_builtin_description *desc;
  98   tree match = NULL_TREE;
  99
 100   /* The vector types are not available if the backend is not initialized.  */
 101   gcc_assert (!flag_preprocess_only);
 102
 103   desc = &spu_builtins[fcode];
 104   if (desc->type != B_OVERLOAD)
 105     return NULL_TREE;
 106
 107   /* Compare the signature of each internal builtin function with the
 108      function arguments until a match is found. */
 109
 110   for (new_fcode = fcode + 1; spu_builtins[new_fcode].type == B_INTERNAL;
 111        new_fcode++)
 112     {
 113       tree decl = targetm.builtin_decl (new_fcode, true);
 114       tree params = TYPE_ARG_TYPES (TREE_TYPE (decl));
 115       tree param;
 116       bool all_scalar;
 117       unsigned int p;
 118
 119       /* Check whether all parameters are scalar.  */
 120       all_scalar = true;
 121       for (param = params; param != void_list_node; param = TREE_CHAIN (param))
 122       if (!SCALAR_TYPE_P (TREE_VALUE (param)))
 123         all_scalar = false;
 124
 125       for (param = params, p = 0;
 126            param != void_list_node;
 127            param = TREE_CHAIN (param), p++)
 128         {
 129           tree var, arg_type, param_type = TREE_VALUE (param);
 130
 131           if (p >= nargs)
 132             {
 133               error ("insufficient arguments to overloaded function %s",
 134                      desc->name);
 135               return error_mark_node;
 136             }
 137
 138           var = (*fnargs)[p];
 139
 140           if (TREE_CODE (var) == NON_LVALUE_EXPR)
 141             var = TREE_OPERAND (var, 0);
 142
 143           if (TREE_CODE (var) == ERROR_MARK)
 144             return NULL_TREE;   /* Let somebody else deal with the problem. */
 145
 146           arg_type = TREE_TYPE (var);
 147
 148           /* The intrinsics spec does not specify precisely how to
 149              resolve generic intrinsics.  We require an exact match
 150              for vector types and let C do it's usual parameter type
 151              checking/promotions for scalar arguments, except for the
 152              first argument of intrinsics which don't have a vector
 153              parameter. */
 154           if ((!SCALAR_TYPE_P (param_type)
 155                || !SCALAR_TYPE_P (arg_type)
 156                || (all_scalar && p == 0))
 157               && !lang_hooks.types_compatible_p (param_type, arg_type))
 158             break;
 159         }
 160       if (param == void_list_node)
 161         {
 162           if (p != nargs)
 163             {
 164               error ("too many arguments to overloaded function %s",
 165                      desc->name);
 166               return error_mark_node;
 167             }
 168
 169           match = decl;
 170           break;
 171         }
 172     }
 173
 174   if (match == NULL_TREE)
 175     {
 176       error ("parameter list does not match a valid signature for %s()",
 177              desc->name);
 178       return error_mark_node;
 179     }
 180
 181   return build_function_call_vec (loc, vNULL, match, fnargs, NULL);
 182 #undef SCALAR_TYPE_P
 183 }
 184
 185
 186 void
 187 spu_cpu_cpp_builtins (struct cpp_reader *pfile)
 188 {
 189   cpp_define (pfile, "__SPU__");
 190   cpp_assert (pfile, "cpu=spu");
 191   cpp_assert (pfile, "machine=spu");
 192   if (spu_arch == PROCESSOR_CELLEDP)
 193     cpp_define (pfile, "__SPU_EDP__");
 194   if (cpp_get_options (pfile)->lang != CLK_ASM)
 195     cpp_define (pfile, "__vector=__attribute__((__spu_vector__))");
 196   switch (spu_ea_model)
 197     {
 198     case 32:
 199       cpp_define (pfile, "__EA32__");
 200       break;
 201     case 64:
 202       cpp_define (pfile, "__EA64__");
 203       break;
 204     default:
 205        gcc_unreachable ();
 206     }
 207
 208   if (!flag_iso && cpp_get_options (pfile)->lang != CLK_ASM)
 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 }