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130 lines
3.2 KiB
C
130 lines
3.2 KiB
C
/* Common hooks for RISC-V.
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Copyright (C) 1989-2014 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "common/common-target.h"
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#include "common/common-target-def.h"
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#include "opts.h"
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#include "flags.h"
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#include "errors.h"
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/* Parse a RISC-V ISA string into an option mask. */
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static void
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riscv_parse_arch_string (const char *isa, int *flags)
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{
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const char *p = isa;
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if (strncmp (p, "RV32", 4) == 0)
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*flags |= MASK_32BIT, p += 4;
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else if (strncmp (p, "RV64", 4) == 0)
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*flags &= ~MASK_32BIT, p += 4;
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if (*p++ != 'I')
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{
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error ("-march=%s: ISA strings must begin with I, RV32I, or RV64I", isa);
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return;
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}
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*flags &= ~MASK_MULDIV;
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if (*p == 'M')
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*flags |= MASK_MULDIV, p++;
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*flags &= ~MASK_ATOMIC;
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if (*p == 'A')
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*flags |= MASK_ATOMIC, p++;
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*flags |= MASK_SOFT_FLOAT_ABI;
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if (*p == 'F')
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*flags &= ~MASK_SOFT_FLOAT_ABI, p++;
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if (*p == 'D')
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{
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p++;
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if (!TARGET_HARD_FLOAT)
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{
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error ("-march=%s: the D extension requires the F extension", isa);
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return;
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}
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}
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else if (TARGET_HARD_FLOAT)
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{
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error ("-march=%s: single-precision-only is not yet supported", isa);
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return;
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}
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if (*p)
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{
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error ("-march=%s: unsupported ISA substring %s", isa, p);
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return;
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}
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}
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static int
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riscv_flags_from_arch_string (const char *isa)
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{
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int flags = 0;
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riscv_parse_arch_string (isa, &flags);
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return flags;
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}
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/* Implement TARGET_HANDLE_OPTION. */
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static bool
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riscv_handle_option (struct gcc_options *opts,
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struct gcc_options *opts_set ATTRIBUTE_UNUSED,
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const struct cl_decoded_option *decoded,
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location_t loc ATTRIBUTE_UNUSED)
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{
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switch (decoded->opt_index)
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{
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case OPT_march_:
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riscv_parse_arch_string (decoded->arg, &opts->x_target_flags);
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return true;
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default:
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return true;
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}
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}
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/* Implement TARGET_OPTION_OPTIMIZATION_TABLE. */
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static const struct default_options riscv_option_optimization_table[] =
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{
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{ OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
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{ OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
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{ OPT_LEVELS_NONE, 0, NULL, 0 }
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};
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#undef TARGET_OPTION_OPTIMIZATION_TABLE
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#define TARGET_OPTION_OPTIMIZATION_TABLE riscv_option_optimization_table
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#undef TARGET_DEFAULT_TARGET_FLAGS
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#define TARGET_DEFAULT_TARGET_FLAGS \
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(TARGET_DEFAULT \
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| riscv_flags_from_arch_string (RISCV_ARCH_STRING_DEFAULT) \
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| (TARGET_64BIT_DEFAULT ? 0 : MASK_32BIT))
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#undef TARGET_HANDLE_OPTION
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#define TARGET_HANDLE_OPTION riscv_handle_option
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struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
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