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

   1 /* Common hooks of Andes NDS32 cpu for GNU compiler
   2    Copyright (C) 2012-2021 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, "%<-misr-vector-size=%d%> argument must be 4 or 16", value);
  50           return false;
  51         }
  52
  53       return true;
  54
  55     case OPT_misr_secure_:
  56       /* Check the valid security level: 0 1 2 3.  */
  57       if (value < 0 || value > 3)
  58         {
  59           error_at (loc, "%<-misr-secure=%d%> argument not in between 0 and 3",
  60                     value);
  61           return false;
  62         }
  63       return true;
  64
  65     case OPT_mcache_block_size_:
  66       /* Check valid value: 4 8 16 32 64 128 256 512.  */
  67       if (exact_log2 (value) < 2 || exact_log2 (value) > 9)
  68         {
  69           error_at (loc, "for the option %<-mcache-block-size=X%>, the valid X "
  70                          "must be: 4, 8, 16, 32, 64, 128, 256, or 512");
  71           return false;
  72         }
  73
  74       return true;
  75
  76     default:
  77       return true;
  78     }
  79 }
  80
  81 /* ------------------------------------------------------------------------ */
  82
  83 /* Implement TARGET_OPTION_OPTIMIZATION_TABLE.  */
  84 static const struct default_options nds32_option_optimization_table[] =
  85 {
  86 #if TARGET_LINUX_ABI == 0
  87   /* Disable -fdelete-null-pointer-checks by default in ELF toolchain.  */
  88   { OPT_LEVELS_ALL,               OPT_fdelete_null_pointer_checks,
  89                                                            NULL, 0 },
  90 #endif
  91   /* Enable -fsched-pressure by default at -O1 and above.  */
  92   { OPT_LEVELS_1_PLUS,            OPT_fsched_pressure,     NULL, 1 },
  93   /* Enable -fomit-frame-pointer by default at all optimization levels.  */
  94   { OPT_LEVELS_ALL,               OPT_fomit_frame_pointer, NULL, 1 },
  95   /* Enable -mrelax-hint by default at all optimization levels.  */
  96   { OPT_LEVELS_ALL,               OPT_mrelax_hint,         NULL, 1 },
  97   /* Enalbe -malways-align by default at -O1 and above, but not -Os or -Og.  */
  98   { OPT_LEVELS_1_PLUS_SPEED_ONLY, OPT_malways_align,       NULL, 1 },
  99   /* Enable -mv3push by default at -Os, but it is useless under V2 ISA.  */
 100   { OPT_LEVELS_SIZE,              OPT_mv3push,             NULL, 1 },
 101
 102   { OPT_LEVELS_NONE,              0,                       NULL, 0 }
 103 };
 104
 105 /* ------------------------------------------------------------------------ */
 106
 107 /* Implement TARGET_EXCEPT_UNWIND_INFO.  */
 108 static enum unwind_info_type
 109 nds32_except_unwind_info (struct gcc_options *opts ATTRIBUTE_UNUSED)
 110 {
 111   if (TARGET_LINUX_ABI)
 112     return UI_DWARF2;
 113
 114   return UI_SJLJ;
 115 }
 116
 117 /* ------------------------------------------------------------------------ */
 118
 119 \f
 120 /* Run-time Target Specification.  */
 121
 122 /* The default target flags consist of
 123    TARGET_CPU_DEFAULT and other MASK_XXX flags.
 124
 125    The value of TARGET_CPU_DEFAULT is set by
 126    the process of 'configure' and 'make' stage.
 127    Please check gcc/config.gcc for more implementation detail.
 128
 129    Other MASK_XXX flags are set individually.
 130    By default we enable
 131      TARGET_16_BIT     : Generate 16/32 bit mixed length instruction.
 132      TARGET_EXT_PERF   : Generate performance extention instrcution.
 133      TARGET_EXT_PERF2  : Generate performance extention version 2 instrcution.
 134      TARGET_EXT_STRING : Generate string extention instrcution.
 135      TARGET_HW_ABS     : Generate hardware abs instruction.
 136      TARGET_CMOV       : Generate conditional move instruction.  */
 137 #undef TARGET_DEFAULT_TARGET_FLAGS
 138 #define TARGET_DEFAULT_TARGET_FLAGS             \
 139   (TARGET_CPU_DEFAULT                           \
 140    | TARGET_DEFAULT_FPU_ISA                     \
 141    | TARGET_DEFAULT_FPU_FMA                     \
 142    | MASK_16_BIT                                \
 143    | MASK_EXT_PERF                              \
 144    | MASK_EXT_PERF2                             \
 145    | MASK_EXT_STRING                            \
 146    | MASK_HW_ABS                                \
 147    | MASK_CMOV)
 148
 149 #undef TARGET_HANDLE_OPTION
 150 #define TARGET_HANDLE_OPTION nds32_handle_option
 151
 152 #undef TARGET_OPTION_OPTIMIZATION_TABLE
 153 #define TARGET_OPTION_OPTIMIZATION_TABLE nds32_option_optimization_table
 154
 155 \f
 156 /* Defining the Output Assembler Language.  */
 157
 158 #undef TARGET_EXCEPT_UNWIND_INFO
 159 #define TARGET_EXCEPT_UNWIND_INFO nds32_except_unwind_info
 160
 161 /* ------------------------------------------------------------------------ */
 162
 163 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
 164
 165 /* ------------------------------------------------------------------------ */