1 /* Definitions for option handling for IA-32. 2 Copyright (C) 1988-2018 Free Software Foundation, Inc. 3 4 This file is part of GCC. 5 6 GCC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 3, or (at your option) 9 any later version. 10 11 GCC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 Under Section 7 of GPL version 3, you are granted additional 17 permissions described in the GCC Runtime Library Exception, version 18 3.1, as published by the Free Software Foundation. 19 20 You should have received a copy of the GNU General Public License and 21 a copy of the GCC Runtime Library Exception along with this program; 22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 <http://www.gnu.org/licenses/>. */ 24 25 #ifndef I386_OPTS_H 26 #define I386_OPTS_H 27 28 /* Algorithm to expand string function with. */ 29 enum stringop_alg 30 { 31 #undef DEF_ENUM 32 #define DEF_ENUM 33 34 #undef DEF_ALG 35 #define DEF_ALG(alg, name) alg, 36 37 #include "stringop.def" 38 last_alg 39 40 #undef DEF_ENUM 41 #undef DEF_ALG 42 }; 43 44 /* Available call abi. */ 45 enum calling_abi 46 { 47 SYSV_ABI = 0, 48 MS_ABI = 1 49 }; 50 51 enum fpmath_unit 52 { 53 FPMATH_387 = 1, 54 FPMATH_SSE = 2 55 }; 56 57 enum tls_dialect 58 { 59 TLS_DIALECT_GNU, 60 TLS_DIALECT_GNU2, 61 TLS_DIALECT_SUN 62 }; 63 64 enum cmodel { 65 CM_32, /* The traditional 32-bit ABI. */ 66 CM_SMALL, /* Assumes all code and data fits in the low 31 bits. */ 67 CM_KERNEL, /* Assumes all code and data fits in the high 31 bits. */ 68 CM_MEDIUM, /* Assumes code fits in the low 31 bits; data unlimited. */ 69 CM_LARGE, /* No assumptions. */ 70 CM_SMALL_PIC, /* Assumes code+data+got/plt fits in a 31 bit region. */ 71 CM_MEDIUM_PIC,/* Assumes code+got/plt fits in a 31 bit region. */ 72 CM_LARGE_PIC /* No assumptions. */ 73 }; 74 75 enum pmode { 76 PMODE_SI, /* Pmode == SImode. */ 77 PMODE_DI /* Pmode == DImode. */ 78 }; 79 80 enum ix86_align_data { 81 ix86_align_data_type_compat, 82 ix86_align_data_type_abi, 83 ix86_align_data_type_cacheline 84 }; 85 86 enum asm_dialect { 87 ASM_ATT, 88 ASM_INTEL 89 }; 90 91 enum ix86_veclibabi { 92 ix86_veclibabi_type_none, 93 ix86_veclibabi_type_svml, 94 ix86_veclibabi_type_acml 95 }; 96 97 enum stack_protector_guard { 98 SSP_TLS, /* per-thread canary in TLS block */ 99 SSP_GLOBAL /* global canary */ 100 }; 101 102 enum prefer_vector_width { 103 PVW_NONE, 104 PVW_AVX128, 105 PVW_AVX256, 106 PVW_AVX512 107 }; 108 109 /* This is used to mitigate variant #2 of the speculative execution 110 vulnerabilities on x86 processors identified by CVE-2017-5715, aka 111 Spectre. They convert indirect branches and function returns to 112 call and return thunks to avoid speculative execution via indirect 113 call, jmp and ret. */ 114 enum indirect_branch { 115 indirect_branch_unset = 0, 116 indirect_branch_keep, 117 indirect_branch_thunk, 118 indirect_branch_thunk_inline, 119 indirect_branch_thunk_extern 120 }; 121 122 #endif 123