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28 lines
602 B
Bash
28 lines
602 B
Bash
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#!/bin/sh
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flags=$(grep '^flags\b' </proc/cpuinfo | head -n 1)
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flags=" ${flags#*:} "
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has_flags () {
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for flag; do
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case "$flags" in
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*" $flag "*) :;;
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*) return 1;;
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esac
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done
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}
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determine_level () {
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level=0
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has_flags lm cmov cx8 fpu fxsr mmx syscall sse2 || return 0
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level=1
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has_flags cx16 lahf_lm popcnt sse4_1 sse4_2 ssse3 || return 0
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level=2
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has_flags avx avx2 bmi1 bmi2 f16c fma abm movbe xsave || return 0
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level=3
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has_flags avx512f avx512bw avx512cd avx512dq avx512vl || return 0
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level=4
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}
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determine_level
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echo "Your CPU supports amd64-v$level"
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return $level
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