gcc/common/config/v850/v850-common.c

   1 /* Common hooks for NEC V850 series.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
   3    2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   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 by
   9    the Free Software Foundation; either version 3, or (at your option)
  10    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 or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15    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 /* Information about the various small memory areas.  */
  32 static const int small_memory_physical_max[(int) SMALL_MEMORY_max] =
  33 {
  34   256,
  35   65536,
  36   32768,
  37 };
  38
  39 /* Set the maximum size of small memory area TYPE to the value given
  40    by SIZE in structure OPTS (option text OPT passed at location LOC).  */
  41
  42 static void
  43 v850_handle_memory_option (enum small_memory_type type,
  44                            struct gcc_options *opts, const char *opt,
  45                            int size, location_t loc)
  46 {
  47   if (size > small_memory_physical_max[type])
  48     error_at (loc, "value passed in %qs is too large", opt);
  49   else
  50     opts->x_small_memory_max[type] = size;
  51 }
  52
  53 /* Implement TARGET_HANDLE_OPTION.  */
  54
  55 static bool
  56 v850_handle_option (struct gcc_options *opts,
  57                     struct gcc_options *opts_set ATTRIBUTE_UNUSED,
  58                     const struct cl_decoded_option *decoded,
  59                     location_t loc)
  60 {
  61   size_t code = decoded->opt_index;
  62   int value = decoded->value;
  63
  64   switch (code)
  65     {
  66     case OPT_mspace:
  67       opts->x_target_flags |= MASK_EP | MASK_PROLOG_FUNCTION;
  68       return true;
  69
  70     case OPT_mv850:
  71       opts->x_target_flags &= ~(MASK_CPU ^ MASK_V850);
  72       return true;
  73
  74     case OPT_mv850e:
  75     case OPT_mv850e1:
  76     case OPT_mv850es:
  77       opts->x_target_flags &= ~(MASK_CPU ^ MASK_V850E);
  78       return true;
  79
  80     case OPT_mv850e2:
  81       opts->x_target_flags &= ~(MASK_CPU ^ MASK_V850E2);
  82       return true;
  83
  84     case OPT_mv850e2v3:
  85       opts->x_target_flags &= ~(MASK_CPU ^ MASK_V850E2V3);
  86       return true;
  87
  88     case OPT_mtda_:
  89       v850_handle_memory_option (SMALL_MEMORY_TDA, opts,
  90                                  decoded->orig_option_with_args_text,
  91                                  value, loc);
  92       return true;
  93
  94     case OPT_msda_:
  95       v850_handle_memory_option (SMALL_MEMORY_SDA, opts,
  96                                  decoded->orig_option_with_args_text,
  97                                  value, loc);
  98       return true;
  99
 100     case OPT_mzda_:
 101       v850_handle_memory_option (SMALL_MEMORY_ZDA, opts,
 102                                  decoded->orig_option_with_args_text,
 103                                  value, loc);
 104       return true;
 105
 106     default:
 107       return true;
 108     }
 109 }
 110
 111 /* Implement TARGET_OPTION_OPTIMIZATION_TABLE.  */
 112
 113 static const struct default_options v850_option_optimization_table[] =
 114   {
 115     { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
 116     /* Note - we no longer enable MASK_EP when optimizing.  This is
 117        because of a hardware bug which stops the SLD and SST instructions
 118        from correctly detecting some hazards.  If the user is sure that
 119        their hardware is fixed or that their program will not encounter
 120        the conditions that trigger the bug then they can enable -mep by
 121        hand.  */
 122     { OPT_LEVELS_1_PLUS, OPT_mprolog_function, NULL, 1 },
 123     { OPT_LEVELS_NONE, 0, NULL, 0 }
 124   };
 125
 126 #undef  TARGET_DEFAULT_TARGET_FLAGS
 127 #define TARGET_DEFAULT_TARGET_FLAGS (MASK_DEFAULT | MASK_APP_REGS)
 128 #undef  TARGET_HANDLE_OPTION
 129 #define TARGET_HANDLE_OPTION v850_handle_option
 130 #undef  TARGET_OPTION_OPTIMIZATION_TABLE
 131 #define TARGET_OPTION_OPTIMIZATION_TABLE v850_option_optimization_table
 132
 133 struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;