1 | /* Definitions for option handling for IA-32. |
2 | Copyright (C) 1988-2023 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_ALG |
32 | #define DEF_ALG(alg, name) alg, |
33 | |
34 | #include "stringop.def" |
35 | last_alg |
36 | |
37 | #undef DEF_ALG |
38 | }; |
39 | |
40 | /* Available call abi. */ |
41 | enum calling_abi |
42 | { |
43 | SYSV_ABI = 0, |
44 | MS_ABI = 1 |
45 | }; |
46 | |
47 | enum fpmath_unit |
48 | { |
49 | FPMATH_387 = 1, |
50 | FPMATH_SSE = 2 |
51 | }; |
52 | |
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 | |
71 | enum pmode { |
72 | PMODE_SI, /* Pmode == SImode. */ |
73 | PMODE_DI /* Pmode == DImode. */ |
74 | }; |
75 | |
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 | |
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 | |
93 | enum stack_protector_guard { |
94 | SSP_TLS, /* per-thread canary in TLS block */ |
95 | SSP_GLOBAL /* global canary */ |
96 | }; |
97 | |
98 | enum prefer_vector_width { |
99 | PVW_NONE, |
100 | PVW_AVX128, |
101 | PVW_AVX256, |
102 | PVW_AVX512 |
103 | }; |
104 | |
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 | |
118 | enum instrument_return { |
119 | instrument_return_none = 0, |
120 | instrument_return_call, |
121 | instrument_return_nop5 |
122 | }; |
123 | |
124 | enum harden_sls { |
125 | harden_sls_none = 0, |
126 | harden_sls_return = 1 << 0, |
127 | harden_sls_indirect_jmp = 1 << 1, |
128 | harden_sls_all = harden_sls_return | harden_sls_indirect_jmp |
129 | }; |
130 | |
131 | enum lam_type { |
132 | lam_none = 0, |
133 | lam_u48 = 1, |
134 | lam_u57 |
135 | }; |
136 | |
137 | enum apx_features { |
138 | apx_none = 0, |
139 | apx_egpr = 1 << 0, |
140 | apx_push2pop2 = 1 << 1, |
141 | apx_ndd = 1 << 2, |
142 | apx_all = apx_egpr | apx_push2pop2 | apx_ndd, |
143 | }; |
144 | |
145 | #endif |
146 | |