gcc/internal-fn.c

   1 /* Internal functions.
   2    Copyright (C) 2011-2013 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #include "config.h"
  21 #include "system.h"
  22 #include "coretypes.h"
  23 #include "internal-fn.h"
  24 #include "tree.h"
  25 #include "expr.h"
  26 #include "optabs.h"
  27 #include "gimple.h"
  28
  29 /* The names of each internal function, indexed by function number.  */
  30 const char *const internal_fn_name_array[] = {
  31 #define DEF_INTERNAL_FN(CODE, FLAGS) #CODE,
  32 #include "internal-fn.def"
  33 #undef DEF_INTERNAL_FN
  34   "<invalid-fn>"
  35 };
  36
  37 /* The ECF_* flags of each internal function, indexed by function number.  */
  38 const int internal_fn_flags_array[] = {
  39 #define DEF_INTERNAL_FN(CODE, FLAGS) FLAGS,
  40 #include "internal-fn.def"
  41 #undef DEF_INTERNAL_FN
  42   0
  43 };
  44
  45 /* ARRAY_TYPE is an array of vector modes.  Return the associated insn
  46    for load-lanes-style optab OPTAB.  The insn must exist.  */
  47
  48 static enum insn_code
  49 get_multi_vector_move (tree array_type, convert_optab optab)
  50 {
  51   enum insn_code icode;
  52   enum machine_mode imode;
  53   enum machine_mode vmode;
  54
  55   gcc_assert (TREE_CODE (array_type) == ARRAY_TYPE);
  56   imode = TYPE_MODE (array_type);
  57   vmode = TYPE_MODE (TREE_TYPE (array_type));
  58
  59   icode = convert_optab_handler (optab, imode, vmode);
  60   gcc_assert (icode != CODE_FOR_nothing);
  61   return icode;
  62 }
  63
  64 /* Expand LOAD_LANES call STMT.  */
  65
  66 static void
  67 expand_LOAD_LANES (gimple stmt)
  68 {
  69   struct expand_operand ops[2];
  70   tree type, lhs, rhs;
  71   rtx target, mem;
  72
  73   lhs = gimple_call_lhs (stmt);
  74   rhs = gimple_call_arg (stmt, 0);
  75   type = TREE_TYPE (lhs);
  76
  77   target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE);
  78   mem = expand_normal (rhs);
  79
  80   gcc_assert (MEM_P (mem));
  81   PUT_MODE (mem, TYPE_MODE (type));
  82
  83   create_output_operand (&ops[0], target, TYPE_MODE (type));
  84   create_fixed_operand (&ops[1], mem);
  85   expand_insn (get_multi_vector_move (type, vec_load_lanes_optab), 2, ops);
  86 }
  87
  88 /* Expand STORE_LANES call STMT.  */
  89
  90 static void
  91 expand_STORE_LANES (gimple stmt)
  92 {
  93   struct expand_operand ops[2];
  94   tree type, lhs, rhs;
  95   rtx target, reg;
  96
  97   lhs = gimple_call_lhs (stmt);
  98   rhs = gimple_call_arg (stmt, 0);
  99   type = TREE_TYPE (rhs);
 100
 101   target = expand_expr (lhs, NULL_RTX, VOIDmode, EXPAND_WRITE);
 102   reg = expand_normal (rhs);
 103
 104   gcc_assert (MEM_P (target));
 105   PUT_MODE (target, TYPE_MODE (type));
 106
 107   create_fixed_operand (&ops[0], target);
 108   create_input_operand (&ops[1], reg, TYPE_MODE (type));
 109   expand_insn (get_multi_vector_move (type, vec_store_lanes_optab), 2, ops);
 110 }
 111
 112 /* Routines to expand each internal function, indexed by function number.
 113    Each routine has the prototype:
 114
 115        expand_<NAME> (gimple stmt)
 116
 117    where STMT is the statement that performs the call. */
 118 static void (*const internal_fn_expanders[]) (gimple) = {
 119 #define DEF_INTERNAL_FN(CODE, FLAGS) expand_##CODE,
 120 #include "internal-fn.def"
 121 #undef DEF_INTERNAL_FN
 122   0
 123 };
 124
 125 /* Expand STMT, which is a call to internal function FN.  */
 126
 127 void
 128 expand_internal_call (gimple stmt)
 129 {
 130   internal_fn_expanders[(int) gimple_call_internal_fn (stmt)] (stmt);
 131 }