gcc/common/config/sh/sh-common.c

/* Common hooks for Renesas / SuperH SH.
   Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
   2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "common/common-target.h"
#include "common/common-target-def.h"
#include "opts.h"
#include "flags.h"
#include "params.h"

/* Set default optimization options.  */
static const struct default_options sh_option_optimization_table[] =
  {
    { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
    { OPT_LEVELS_1_PLUS_SPEED_ONLY, OPT_mdiv_, "inv:minlat", 1 },
    { OPT_LEVELS_SIZE, OPT_mdiv_, SH_DIV_STR_FOR_SIZE, 1 },
    { OPT_LEVELS_0_ONLY, OPT_mdiv_, "", 1 },
    { OPT_LEVELS_SIZE, OPT_mcbranchdi, NULL, 0 },
    /* We can't meaningfully test TARGET_SHMEDIA here, because -m
       options haven't been parsed yet, hence we'd read only the
       default.  sh_target_reg_class will return NO_REGS if this is
       not SHMEDIA, so it's OK to always set
       flag_branch_target_load_optimize.  */
    { OPT_LEVELS_2_PLUS, OPT_fbranch_target_load_optimize, NULL, 1 },
    { OPT_LEVELS_NONE, 0, NULL, 0 }
  };

/* Implement TARGET_HANDLE_OPTION.  */

static bool
sh_handle_option (struct gcc_options *opts,
		  struct gcc_options *opts_set ATTRIBUTE_UNUSED,
		  const struct cl_decoded_option *decoded,
		  location_t loc ATTRIBUTE_UNUSED)
{
  size_t code = decoded->opt_index;

  switch (code)
    {
    case OPT_m1:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH1;
      return true;

    case OPT_m2:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH2;
      return true;

    case OPT_m2a:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH2A;
      return true;

    case OPT_m2a_nofpu:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH2A_NOFPU;
      return true;

    case OPT_m2a_single:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH2A_SINGLE;
      return true;

    case OPT_m2a_single_only:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH2A_SINGLE_ONLY;
      return true;

    case OPT_m2e:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH2E;
      return true;

    case OPT_m3:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH3;
      return true;

    case OPT_m3e:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH3E;
      return true;

    case OPT_m4:
    case OPT_m4_100:
    case OPT_m4_200:
    case OPT_m4_300:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4;
      return true;

    case OPT_m4_nofpu:
    case OPT_m4_100_nofpu:
    case OPT_m4_200_nofpu:
    case OPT_m4_300_nofpu:
    case OPT_m4_340:
    case OPT_m4_400:
    case OPT_m4_500:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4_NOFPU;
      return true;

    case OPT_m4_single:
    case OPT_m4_100_single:
    case OPT_m4_200_single:
    case OPT_m4_300_single:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4_SINGLE;
      return true;

    case OPT_m4_single_only:
    case OPT_m4_100_single_only:
    case OPT_m4_200_single_only:
    case OPT_m4_300_single_only:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4_SINGLE_ONLY;
      return true;

    case OPT_m4a:
      opts->x_target_flags = (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4A;
      return true;

    case OPT_m4a_nofpu:
    case OPT_m4al:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4A_NOFPU;
      return true;

    case OPT_m4a_single:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4A_SINGLE;
      return true;

    case OPT_m4a_single_only:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH4A_SINGLE_ONLY;
      return true;

    case OPT_m5_32media:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH5_32MEDIA;
      return true;

    case OPT_m5_32media_nofpu:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH5_32MEDIA_NOFPU;
      return true;

    case OPT_m5_64media:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH5_64MEDIA;
      return true;

    case OPT_m5_64media_nofpu:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH5_64MEDIA_NOFPU;
      return true;

    case OPT_m5_compact:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH5_COMPACT;
      return true;

    case OPT_m5_compact_nofpu:
      opts->x_target_flags
	= (opts->x_target_flags & ~MASK_ARCH) | SELECT_SH5_COMPACT_NOFPU;
      return true;

    default:
      return true;
    }
}

/* Implement TARGET_OPTION_INIT_STRUCT.  */
static void
sh_option_init_struct (struct gcc_options *opts)
{
  /* We can't meaningfully test TARGET_SH2E / TARGET_IEEE
     here, so leave it to TARGET_OPTION_OVERRIDE to set
     flag_finite_math_only.  We set it to 2 here so we know if the user
     explicitly requested this to be on or off.  */
  opts->x_flag_finite_math_only = 2;
}

/* Implement TARGET_OPTION_DEFAULT_PARAMS.  */
static void
sh_option_default_params (void)
{
  set_default_param_value (PARAM_SIMULTANEOUS_PREFETCHES, 2);
}

#undef TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE sh_option_optimization_table
#undef TARGET_OPTION_INIT_STRUCT
#define TARGET_OPTION_INIT_STRUCT sh_option_init_struct
#undef TARGET_OPTION_DEFAULT_PARAMS
#define TARGET_OPTION_DEFAULT_PARAMS sh_option_default_params
#undef TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS TARGET_DEFAULT
#undef TARGET_HANDLE_OPTION
#define TARGET_HANDLE_OPTION sh_handle_option

struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;