gcc/common/config/nds32/nds32-common.c

   1 /* Common hooks of Andes NDS32 cpu for GNU compiler
   2    Copyright (C) 2012-2013 Free Software Foundation, Inc.
   3    Contributed by Andes Technology Corporation.
   4
   5    This file is part of GCC.
   6
   7    GCC is free software; you can redistribute it and/or modify it
   8    under the terms of the GNU General Public License as published
   9    by the Free Software Foundation; either version 3, or (at your
  10    option) any later version.
  11
  12    GCC is distributed in the hope that it will be useful, but WITHOUT
  13    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  14    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  15    License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with GCC; see the file COPYING3.  If not see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "diagnostic-core.h"
  25 #include "tm.h"
  26 #include "common/common-target.h"
  27 #include "common/common-target-def.h"
  28 #include "opts.h"
  29 #include "flags.h"
  30
  31 /* ------------------------------------------------------------------------ */
  32
  33 /* Implement TARGET_HANDLE_OPTION.  */
  34 static bool
  35 nds32_handle_option (struct gcc_options *opts ATTRIBUTE_UNUSED,
  36                      struct gcc_options *opts_set ATTRIBUTE_UNUSED,
  37                      const struct cl_decoded_option *decoded,
  38                      location_t loc)
  39 {
  40   size_t     code  = decoded->opt_index;
  41   int        value = decoded->value;
  42
  43   switch (code)
  44     {
  45     case OPT_misr_vector_size_:
  46       /* Check the valid vector size: 4 or 16.  */
  47       if (value != 4 && value != 16)
  48         {
  49           error_at (loc, "for the option -misr-vector-size=X, the valid X "
  50                          "must be: 4 or 16");
  51           return false;
  52         }
  53
  54       return true;
  55
  56     case OPT_mcache_block_size_:
  57       /* Check valid value: 4 8 16 32 64 128 256 512.  */
  58       if (exact_log2 (value) < 2 || exact_log2 (value) > 9)
  59         {
  60           error_at (loc, "for the option -mcache-block-size=X, the valid X "
  61                          "must be: 4, 8, 16, 32, 64, 128, 256, or 512");
  62           return false;
  63         }
  64
  65       return true;
  66
  67     default:
  68       return true;
  69     }
  70 }
  71
  72 /* ------------------------------------------------------------------------ */
  73
  74 /* Implement TARGET_OPTION_OPTIMIZATION_TABLE.  */
  75 static const struct default_options nds32_option_optimization_table[] =
  76 {
  77   /* Enable -fomit-frame-pointer by default at -O1 or higher.  */
  78   { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
  79   /* Enable -mv3push by default at -Os, but it is useless under V2 ISA.  */
  80   { OPT_LEVELS_SIZE,   OPT_mv3push,             NULL, 1 },
  81
  82   { OPT_LEVELS_NONE,   0,                       NULL, 0 }
  83 };
  84
  85 /* ------------------------------------------------------------------------ */
  86 \f
  87 /* Run-time Target Specification.  */
  88
  89 /* Default enable
  90      TARGET_GP_DIRECT: Generate gp-imply instruction.
  91      TARGET_16_BIT   : Generate 16/32 bit mixed length instruction.
  92      TARGET_PERF_EXT : Generate performance extention instrcution.
  93      TARGET_CMOV     : Generate conditional move instruction.  */
  94 #undef TARGET_DEFAULT_TARGET_FLAGS
  95 #define TARGET_DEFAULT_TARGET_FLAGS             \
  96   (MASK_GP_DIRECT                               \
  97    | MASK_16_BIT                                \
  98    | MASK_PERF_EXT                              \
  99    | MASK_CMOV)
 100
 101 #undef TARGET_HANDLE_OPTION
 102 #define TARGET_HANDLE_OPTION nds32_handle_option
 103
 104 #undef TARGET_OPTION_OPTIMIZATION_TABLE
 105 #define TARGET_OPTION_OPTIMIZATION_TABLE nds32_option_optimization_table
 106
 107 \f
 108 /* Defining the Output Assembler Language.  */
 109
 110 #undef TARGET_EXCEPT_UNWIND_INFO
 111 #define TARGET_EXCEPT_UNWIND_INFO sjlj_except_unwind_info
 112
 113 /* ------------------------------------------------------------------------ */
 114
 115 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
 116
 117 /* ------------------------------------------------------------------------ */