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/* Definitions for option handling for IA-32.
Copyright (C) 1988-2022 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef I386_OPTS_H
#define I386_OPTS_H
/* Algorithm to expand string function with. */
enum stringop_alg
{
#undef DEF_ALG
#define DEF_ALG(alg, name) alg,
#include "stringop.def"
last_alg
#undef DEF_ALG
};
/* Available call abi. */
enum calling_abi
{
SYSV_ABI = 0,
MS_ABI = 1
};
enum fpmath_unit
{
FPMATH_387 = 1,
FPMATH_SSE = 2
};
enum tls_dialect
{
TLS_DIALECT_GNU,
TLS_DIALECT_GNU2,
TLS_DIALECT_SUN
};
enum cmodel {
CM_32, /* The traditional 32-bit ABI. */
CM_SMALL, /* Assumes all code and data fits in the low 31 bits. */
CM_KERNEL, /* Assumes all code and data fits in the high 31 bits. */
CM_MEDIUM, /* Assumes code fits in the low 31 bits; data unlimited. */
CM_LARGE, /* No assumptions. */
CM_SMALL_PIC, /* Assumes code+data+got/plt fits in a 31 bit region. */
CM_MEDIUM_PIC,/* Assumes code+got/plt fits in a 31 bit region. */
CM_LARGE_PIC /* No assumptions. */
};
enum pmode {
PMODE_SI, /* Pmode == SImode. */
PMODE_DI /* Pmode == DImode. */
};
enum ix86_align_data {
ix86_align_data_type_compat,
ix86_align_data_type_abi,
ix86_align_data_type_cacheline
};
enum asm_dialect {
ASM_ATT,
ASM_INTEL
};
enum ix86_veclibabi {
ix86_veclibabi_type_none,
ix86_veclibabi_type_svml,
ix86_veclibabi_type_acml
};
enum stack_protector_guard {
SSP_TLS, /* per-thread canary in TLS block */
SSP_GLOBAL /* global canary */
};
enum prefer_vector_width {
PVW_NONE,
PVW_AVX128,
PVW_AVX256,
PVW_AVX512
};
/* This is used to mitigate variant #2 of the speculative execution
vulnerabilities on x86 processors identified by CVE-2017-5715, aka
Spectre. They convert indirect branches and function returns to
call and return thunks to avoid speculative execution via indirect
call, jmp and ret. */
enum indirect_branch {
indirect_branch_unset = 0,
indirect_branch_keep,
indirect_branch_thunk,
indirect_branch_thunk_inline,
indirect_branch_thunk_extern
};
enum instrument_return {
instrument_return_none = 0,
instrument_return_call,
instrument_return_nop5
};
enum harden_sls {
harden_sls_none = 0,
harden_sls_return = 1 << 0,
harden_sls_indirect_jmp = 1 << 1,
harden_sls_all = harden_sls_return | harden_sls_indirect_jmp
};
#endif
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