Checking the x86_64 microarchitecture

check-x86_64-microarch.sh

#!/usr/bin/env bash

# Author: Alex Baranowski
# License: MIT

set -e

# we only need first flag line for the cpu
cpu_flags=$(grep '^flags\b' /proc/cpuinfo | head -n 1)
echo -e "supported cpu flags:\n$cpu_flags"
level=0
check_flags(){
    current_level=$1
    shift
    fail_flag=0
    for flag in "$@"; do
        echo "$cpu_flags" | grep -q "$flag" || {
            echo "Flag $flag is missing for $current_level microarchitecture"
            fail_flag=1
        }
    done
    [ $fail_flag -eq 1 ] || level=$current_level
}

main () {
  echo -e "\n\nChecking micro architecture:\n\n"
  check_flags 1 cmov cx8 fpu fxsr lm mmx sse2 syscall && \
  check_flags 2 cx16 lahf_lm popcnt sse4_1 sse4_2 ssse3 && \
  check_flags 3 abm avx avx2 bmi1 bmi2 f16c fma movbe xsave && \
  check_flags 4 avx512bw avx512cd avx512dq avx512f avx512vl check_flags
  echo -e "\n\n\nYour cpu support the x86_64 microarchitecture version $level aka x86_64-v${level}"
}

main