| 1 | /* Get x86 ISA level. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | Copyright (C) 2020-2022 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <elf.h> |
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| 20 | #include <cpu-features.h> |
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| 21 | |
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| 22 | /* Get GNU_PROPERTY_X86_ISA_1_BASELINE and GNU_PROPERTY_X86_ISA_1_V[234] |
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| 23 | ISA level. */ |
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| 24 | |
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| 25 | static unsigned int |
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| 26 | get_isa_level (const struct cpu_features *cpu_features) |
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| 27 | { |
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| 28 | unsigned int isa_level = 0; |
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| 29 | |
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| 30 | if (CPU_FEATURE_USABLE_P (cpu_features, CMOV) |
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| 31 | && CPU_FEATURE_USABLE_P (cpu_features, CX8) |
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| 32 | && CPU_FEATURE_CPU_P (cpu_features, FPU) |
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| 33 | && CPU_FEATURE_USABLE_P (cpu_features, FXSR) |
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| 34 | && CPU_FEATURE_USABLE_P (cpu_features, MMX) |
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| 35 | && CPU_FEATURE_USABLE_P (cpu_features, SSE) |
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| 36 | && CPU_FEATURE_USABLE_P (cpu_features, SSE2)) |
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| 37 | { |
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| 38 | isa_level = GNU_PROPERTY_X86_ISA_1_BASELINE; |
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| 39 | if (CPU_FEATURE_USABLE_P (cpu_features, CMPXCHG16B) |
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| 40 | && CPU_FEATURE_USABLE_P (cpu_features, LAHF64_SAHF64) |
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| 41 | && CPU_FEATURE_USABLE_P (cpu_features, POPCNT) |
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| 42 | && CPU_FEATURE_USABLE_P (cpu_features, SSE3) |
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| 43 | && CPU_FEATURE_USABLE_P (cpu_features, SSSE3) |
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| 44 | && CPU_FEATURE_USABLE_P (cpu_features, SSE4_1) |
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| 45 | && CPU_FEATURE_USABLE_P (cpu_features, SSE4_2)) |
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| 46 | { |
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| 47 | isa_level |= GNU_PROPERTY_X86_ISA_1_V2; |
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| 48 | if (CPU_FEATURE_USABLE_P (cpu_features, AVX) |
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| 49 | && CPU_FEATURE_USABLE_P (cpu_features, AVX2) |
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| 50 | && CPU_FEATURE_USABLE_P (cpu_features, BMI1) |
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| 51 | && CPU_FEATURE_USABLE_P (cpu_features, BMI2) |
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| 52 | && CPU_FEATURE_USABLE_P (cpu_features, F16C) |
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| 53 | && CPU_FEATURE_USABLE_P (cpu_features, FMA) |
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| 54 | && CPU_FEATURE_USABLE_P (cpu_features, LZCNT) |
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| 55 | && CPU_FEATURE_USABLE_P (cpu_features, MOVBE)) |
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| 56 | { |
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| 57 | isa_level |= GNU_PROPERTY_X86_ISA_1_V3; |
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| 58 | if (CPU_FEATURE_USABLE_P (cpu_features, AVX512F) |
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| 59 | && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW) |
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| 60 | && CPU_FEATURE_USABLE_P (cpu_features, AVX512CD) |
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| 61 | && CPU_FEATURE_USABLE_P (cpu_features, AVX512DQ) |
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| 62 | && CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)) |
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| 63 | isa_level |= GNU_PROPERTY_X86_ISA_1_V4; |
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| 64 | } |
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| 65 | } |
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| 66 | } |
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| 67 | |
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| 68 | return isa_level; |
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| 69 | } |
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| 70 | |
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