gcc/common/config/alpha/alpha-common.c

   1 /* Common hooks for DEC Alpha.
   2    Copyright (C) 1992-2017 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
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License 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 "diagnostic-core.h"
  24 #include "tm.h"
  25 #include "common/common-target.h"
  26 #include "common/common-target-def.h"
  27 #include "opts.h"
  28 #include "flags.h"
  29
  30 /* Implement TARGET_OPTION_OPTIMIZATION_TABLE.  */
  31 static const struct default_options alpha_option_optimization_table[] =
  32   {
  33     /* Enable redundant extension instructions removal at -O2 and higher.  */
  34     { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
  35     { OPT_LEVELS_NONE, 0, NULL, 0 }
  36   };
  37
  38 /* Implement TARGET_OPTION_INIT_STRUCT.  */
  39
  40 static void
  41 alpha_option_init_struct (struct gcc_options *opts ATTRIBUTE_UNUSED)
  42 {
  43 #if TARGET_ABI_OPEN_VMS
  44   /* Enable section anchors by default.  */
  45   opts->x_flag_section_anchors = 1;
  46 #endif
  47 }
  48
  49 /* Implement TARGET_HANDLE_OPTION.  */
  50
  51 static bool
  52 alpha_handle_option (struct gcc_options *opts,
  53                      struct gcc_options *opts_set ATTRIBUTE_UNUSED,
  54                      const struct cl_decoded_option *decoded,
  55                      location_t loc)
  56 {
  57   size_t code = decoded->opt_index;
  58   const char *arg = decoded->arg;
  59   int value = decoded->value;
  60
  61   switch (code)
  62     {
  63     case OPT_mfp_regs:
  64       if (value == 0)
  65         opts->x_target_flags |= MASK_SOFT_FP;
  66       break;
  67
  68     case OPT_mieee:
  69     case OPT_mieee_with_inexact:
  70       opts->x_target_flags |= MASK_IEEE_CONFORMANT;
  71       break;
  72
  73     case OPT_mtls_size_:
  74       if (value != 16 && value != 32 && value != 64)
  75         error_at (loc, "bad value %qs for -mtls-size switch", arg);
  76       break;
  77     }
  78
  79   return true;
  80 }
  81
  82 #undef TARGET_DEFAULT_TARGET_FLAGS
  83 #define TARGET_DEFAULT_TARGET_FLAGS \
  84   (TARGET_DEFAULT | TARGET_CPU_DEFAULT | TARGET_DEFAULT_EXPLICIT_RELOCS)
  85 #undef TARGET_HANDLE_OPTION
  86 #define TARGET_HANDLE_OPTION alpha_handle_option
  87
  88 #undef TARGET_OPTION_INIT_STRUCT
  89 #define TARGET_OPTION_INIT_STRUCT alpha_option_init_struct
  90
  91 #undef TARGET_OPTION_OPTIMIZATION_TABLE
  92 #define TARGET_OPTION_OPTIMIZATION_TABLE alpha_option_optimization_table
  93
  94 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;