I assume it means "SSE2 is baseline / non-optional for x86-64, so compilers can always use SSE1/SSE2 instructions when targeting x86-64." https://stackoverflow.

I assume it means "SSE2 is baseline / non-optional for x86-64, so compilers can always use SSE1/SSE2 instructions when targeting x86-64." https://stackoverflow.com/a/50786881 https://stackoverflow.com/a/50786881