1/* Get x86 ISA level.
2 This file is part of the GNU C Library.
3 Copyright (C) 2020 Free Software Foundation, Inc.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <elf.h>
20#include <cpu-features.h>
21
22/* Get GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234]
23 ISA level. */
24
25static unsigned int
26get_isa_level (const struct cpu_features *cpu_features)
27{
28 unsigned int isa_level = 0;
29
30 if (CPU_FEATURE_USABLE_P (cpu_features, CMOV)
31 && CPU_FEATURE_USABLE_P (cpu_features, CX8)
32 && CPU_FEATURE_CPU_P (cpu_features, FPU)
33 && CPU_FEATURE_USABLE_P (cpu_features, FXSR)
34 && CPU_FEATURE_USABLE_P (cpu_features, MMX)
35 && CPU_FEATURE_USABLE_P (cpu_features, SSE)
36 && CPU_FEATURE_USABLE_P (cpu_features, SSE2))
37 {
38 isa_level = GNU_PROPERTY_X86_ISA_1_BASELINE;
39 if (CPU_FEATURE_USABLE_P (cpu_features, CMPXCHG16B)
40 && CPU_FEATURE_USABLE_P (cpu_features, LAHF64_SAHF64)
41 && CPU_FEATURE_USABLE_P (cpu_features, POPCNT)
42 && CPU_FEATURE_USABLE_P (cpu_features, SSE3)
43 && CPU_FEATURE_USABLE_P (cpu_features, SSSE3)
44 && CPU_FEATURE_USABLE_P (cpu_features, SSE4_1)
45 && CPU_FEATURE_USABLE_P (cpu_features, SSE4_2))
46 {
47 isa_level |= GNU_PROPERTY_X86_ISA_1_V2;
48 if (CPU_FEATURE_USABLE_P (cpu_features, AVX)
49 && CPU_FEATURE_USABLE_P (cpu_features, AVX2)
50 && CPU_FEATURE_USABLE_P (cpu_features, F16C)
51 && CPU_FEATURE_USABLE_P (cpu_features, FMA)
52 && CPU_FEATURE_USABLE_P (cpu_features, LZCNT)
53 && CPU_FEATURE_USABLE_P (cpu_features, MOVBE))
54 {
55 isa_level |= GNU_PROPERTY_X86_ISA_1_V3;
56 if (CPU_FEATURE_USABLE_P (cpu_features, AVX512F)
57 && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)
58 && CPU_FEATURE_USABLE_P (cpu_features, AVX512CD)
59 && CPU_FEATURE_USABLE_P (cpu_features, AVX512DQ)
60 && CPU_FEATURE_USABLE_P (cpu_features, AVX512VL))
61 isa_level |= GNU_PROPERTY_X86_ISA_1_V4;
62 }
63 }
64 }
65
66 return isa_level;
67}
68