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/* Common hooks for RISC-V.
Copyright (C) 2016-2019 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 "diagnostic-core.h"
/* Parse a RISC-V ISA string into an option mask. Must clear or set all arch
dependent mask bits, in case more than one -march string is passed. */
static void
riscv_parse_arch_string (const char *isa, int *flags, location_t loc)
{
const char *p = isa;
if (strncmp (p, "rv32", 4) == 0)
*flags &= ~MASK_64BIT, p += 4;
else if (strncmp (p, "rv64", 4) == 0)
*flags |= MASK_64BIT, p += 4;
else
{
error_at (loc, "-march=%s: ISA string must begin with rv32 or rv64", isa);
return;
}
if (*p == 'g')
{
p++;
*flags &= ~MASK_RVE;
*flags |= MASK_MUL;
*flags |= MASK_ATOMIC;
*flags |= MASK_HARD_FLOAT;
*flags |= MASK_DOUBLE_FLOAT;
}
else if (*p == 'i')
{
p++;
*flags &= ~MASK_RVE;
*flags &= ~MASK_MUL;
if (*p == 'm')
*flags |= MASK_MUL, p++;
*flags &= ~MASK_ATOMIC;
if (*p == 'a')
*flags |= MASK_ATOMIC, p++;
*flags &= ~(MASK_HARD_FLOAT | MASK_DOUBLE_FLOAT);
if (*p == 'f')
{
*flags |= MASK_HARD_FLOAT, p++;
if (*p == 'd')
{
*flags |= MASK_DOUBLE_FLOAT;
p++;
}
}
}
else if (*p == 'e')
{
p++;
*flags |= MASK_RVE;
if (*flags & MASK_64BIT)
{
error ("RV64E is not a valid base ISA");
return;
}
*flags &= ~MASK_MUL;
if (*p == 'm')
*flags |= MASK_MUL, p++;
*flags &= ~MASK_ATOMIC;
if (*p == 'a')
*flags |= MASK_ATOMIC, p++;
*flags &= ~(MASK_HARD_FLOAT | MASK_DOUBLE_FLOAT);
}
else
{
error_at (loc, "-march=%s: invalid ISA string", isa);
return;
}
*flags &= ~MASK_RVC;
if (*p == 'c')
*flags |= MASK_RVC, p++;
if (*p)
{
error_at (loc, "-march=%s: unsupported ISA substring %qs", isa, p);
return;
}
}
/* Implement TARGET_HANDLE_OPTION. */
static bool
riscv_handle_option (struct gcc_options *opts,
struct gcc_options *opts_set ATTRIBUTE_UNUSED,
const struct cl_decoded_option *decoded,
location_t loc)
{
switch (decoded->opt_index)
{
case OPT_march_:
riscv_parse_arch_string (decoded->arg, &opts->x_target_flags, loc);
return true;
default:
return true;
}
}
/* Implement TARGET_OPTION_OPTIMIZATION_TABLE. */
static const struct default_options riscv_option_optimization_table[] =
{
{ OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
{ OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
{ OPT_LEVELS_NONE, 0, NULL, 0 }
};
#undef TARGET_OPTION_OPTIMIZATION_TABLE
#define TARGET_OPTION_OPTIMIZATION_TABLE riscv_option_optimization_table
#undef TARGET_HANDLE_OPTION
#define TARGET_HANDLE_OPTION riscv_handle_option
struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
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