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A comment on Gathering Intel on Intel AVX-512 Transitions. Parent comment

Re:Gathering Intel on Intel AVX-512 Transitions by ncmncm on Friday January 17, 2020 @10:18PM (#22082009)
-march=native implies -mtune=native.

You can say -march=native -mtune=sandybridge, but there would be no point.

You can say -march=sandybridge -mtune=native, usefully. It might go slower on a real sandybridge than if tuned for it, but would still work, and would go as fast as the smaller instruction mix allows on your build machine.

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Re:Gathering Intel on Intel AVX-512 Transitions by inetknght on Saturday January 18, 2020 @12:12AM (#22082441)
I know this. I don't care. I use `-march-native -mtune=native` specifically to point other developers on the team to the two relevant compiler options. And if they don't look, nothing's lost.
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