Or also getauxval? Highway has code to check for this, including that vectors are at least 128 bits: https://github.com/google/highway/blob/master/hwy/targets.c

Or also getauxval? Highway has code to check for this, including that vectors are at least 128 bits: https://github.com/google/highway/blob/master/hwy/targets.cc#L664 https://github.com/google/highway/blob/master/hwy/targets.cc...