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7eb68c06 | 1 | /* Definitions for option handling for IA-32. |
7adcbafe | 2 | Copyright (C) 1988-2022 Free Software Foundation, Inc. |
7eb68c06 JM |
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 | { | |
ad83025e XDL |
31 | #undef DEF_ALG |
32 | #define DEF_ALG(alg, name) alg, | |
33 | ||
34 | #include "stringop.def" | |
35 | last_alg | |
36 | ||
ad83025e | 37 | #undef DEF_ALG |
7eb68c06 JM |
38 | }; |
39 | ||
40 | /* Available call abi. */ | |
41 | enum calling_abi | |
42 | { | |
43 | SYSV_ABI = 0, | |
44 | MS_ABI = 1 | |
45 | }; | |
46 | ||
8023568e JM |
47 | enum fpmath_unit |
48 | { | |
49 | FPMATH_387 = 1, | |
50 | FPMATH_SSE = 2 | |
51 | }; | |
52 | ||
7eb68c06 JM |
53 | enum tls_dialect |
54 | { | |
55 | TLS_DIALECT_GNU, | |
56 | TLS_DIALECT_GNU2, | |
57 | TLS_DIALECT_SUN | |
58 | }; | |
59 | ||
60 | enum cmodel { | |
61 | CM_32, /* The traditional 32-bit ABI. */ | |
62 | CM_SMALL, /* Assumes all code and data fits in the low 31 bits. */ | |
63 | CM_KERNEL, /* Assumes all code and data fits in the high 31 bits. */ | |
64 | CM_MEDIUM, /* Assumes code fits in the low 31 bits; data unlimited. */ | |
65 | CM_LARGE, /* No assumptions. */ | |
66 | CM_SMALL_PIC, /* Assumes code+data+got/plt fits in a 31 bit region. */ | |
67 | CM_MEDIUM_PIC,/* Assumes code+got/plt fits in a 31 bit region. */ | |
68 | CM_LARGE_PIC /* No assumptions. */ | |
69 | }; | |
70 | ||
28968d91 L |
71 | enum pmode { |
72 | PMODE_SI, /* Pmode == SImode. */ | |
73 | PMODE_DI /* Pmode == DImode. */ | |
74 | }; | |
75 | ||
239711f6 L |
76 | enum ix86_align_data { |
77 | ix86_align_data_type_compat, | |
78 | ix86_align_data_type_abi, | |
79 | ix86_align_data_type_cacheline | |
80 | }; | |
81 | ||
7eb68c06 JM |
82 | enum asm_dialect { |
83 | ASM_ATT, | |
84 | ASM_INTEL | |
85 | }; | |
86 | ||
87 | enum ix86_veclibabi { | |
88 | ix86_veclibabi_type_none, | |
89 | ix86_veclibabi_type_svml, | |
90 | ix86_veclibabi_type_acml | |
91 | }; | |
92 | ||
e0ea8797 AH |
93 | enum stack_protector_guard { |
94 | SSP_TLS, /* per-thread canary in TLS block */ | |
95 | SSP_GLOBAL /* global canary */ | |
96 | }; | |
97 | ||
ab2c4ec8 SS |
98 | enum prefer_vector_width { |
99 | PVW_NONE, | |
100 | PVW_AVX128, | |
101 | PVW_AVX256, | |
102 | PVW_AVX512 | |
103 | }; | |
104 | ||
da99fd4a L |
105 | /* This is used to mitigate variant #2 of the speculative execution |
106 | vulnerabilities on x86 processors identified by CVE-2017-5715, aka | |
107 | Spectre. They convert indirect branches and function returns to | |
108 | call and return thunks to avoid speculative execution via indirect | |
109 | call, jmp and ret. */ | |
110 | enum indirect_branch { | |
111 | indirect_branch_unset = 0, | |
112 | indirect_branch_keep, | |
113 | indirect_branch_thunk, | |
114 | indirect_branch_thunk_inline, | |
115 | indirect_branch_thunk_extern | |
116 | }; | |
117 | ||
3b31afe1 AK |
118 | enum instrument_return { |
119 | instrument_return_none = 0, | |
120 | instrument_return_call, | |
121 | instrument_return_nop5 | |
122 | }; | |
123 | ||
53a643f8 L |
124 | enum harden_sls { |
125 | harden_sls_none = 0, | |
126 | harden_sls_return = 1 << 0, | |
127 | harden_sls_indirect_branch = 1 << 1, | |
128 | harden_sls_all = harden_sls_return | harden_sls_indirect_branch | |
129 | }; | |
130 | ||
7eb68c06 | 131 | #endif |