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111
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1 /* Definitions for option handling for IA-32.
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2 Copyright (C) 1988-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of GCC.
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5
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6 GCC is free software; you can redistribute it and/or modify
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7 it under the terms of the GNU General Public License as published by
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8 the Free Software Foundation; either version 3, or (at your option)
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9 any later version.
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10
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11 GCC is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 GNU General Public License for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #ifndef I386_OPTS_H
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26 #define I386_OPTS_H
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27
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28 /* Algorithm to expand string function with. */
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29 enum stringop_alg
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30 {
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31 #undef DEF_ENUM
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32 #define DEF_ENUM
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33
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34 #undef DEF_ALG
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35 #define DEF_ALG(alg, name) alg,
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36
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37 #include "stringop.def"
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38 last_alg
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39
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40 #undef DEF_ENUM
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41 #undef DEF_ALG
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42 };
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43
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44 /* Available call abi. */
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45 enum calling_abi
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46 {
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47 SYSV_ABI = 0,
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48 MS_ABI = 1
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49 };
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50
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51 enum fpmath_unit
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52 {
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53 FPMATH_387 = 1,
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54 FPMATH_SSE = 2
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55 };
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56
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57 enum tls_dialect
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58 {
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59 TLS_DIALECT_GNU,
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60 TLS_DIALECT_GNU2,
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61 TLS_DIALECT_SUN
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62 };
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63
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64 enum cmodel {
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65 CM_32, /* The traditional 32-bit ABI. */
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66 CM_SMALL, /* Assumes all code and data fits in the low 31 bits. */
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67 CM_KERNEL, /* Assumes all code and data fits in the high 31 bits. */
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68 CM_MEDIUM, /* Assumes code fits in the low 31 bits; data unlimited. */
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69 CM_LARGE, /* No assumptions. */
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70 CM_SMALL_PIC, /* Assumes code+data+got/plt fits in a 31 bit region. */
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71 CM_MEDIUM_PIC,/* Assumes code+got/plt fits in a 31 bit region. */
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72 CM_LARGE_PIC /* No assumptions. */
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73 };
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74
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75 enum pmode {
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76 PMODE_SI, /* Pmode == SImode. */
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77 PMODE_DI /* Pmode == DImode. */
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78 };
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79
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80 enum ix86_align_data {
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81 ix86_align_data_type_compat,
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82 ix86_align_data_type_abi,
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83 ix86_align_data_type_cacheline
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84 };
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85
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86 enum asm_dialect {
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87 ASM_ATT,
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88 ASM_INTEL
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89 };
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90
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91 enum ix86_veclibabi {
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92 ix86_veclibabi_type_none,
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93 ix86_veclibabi_type_svml,
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94 ix86_veclibabi_type_acml
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95 };
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96
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97 enum stack_protector_guard {
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98 SSP_TLS, /* per-thread canary in TLS block */
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99 SSP_GLOBAL /* global canary */
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100 };
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101
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131
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102 enum prefer_vector_width {
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103 PVW_NONE,
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104 PVW_AVX128,
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105 PVW_AVX256,
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106 PVW_AVX512
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107 };
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108
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109 /* This is used to mitigate variant #2 of the speculative execution
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110 vulnerabilities on x86 processors identified by CVE-2017-5715, aka
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111 Spectre. They convert indirect branches and function returns to
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112 call and return thunks to avoid speculative execution via indirect
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113 call, jmp and ret. */
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114 enum indirect_branch {
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115 indirect_branch_unset = 0,
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116 indirect_branch_keep,
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117 indirect_branch_thunk,
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118 indirect_branch_thunk_inline,
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119 indirect_branch_thunk_extern
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120 };
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121
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145
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122 enum instrument_return {
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123 instrument_return_none = 0,
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124 instrument_return_call,
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125 instrument_return_nop5
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126 };
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127
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128 #endif
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