Hmm, not sure what the llvm semantics look like, but you're right about the assembly semantics, vminsd (the instruction used in the post) is unfortunately not s

Hmm, not sure what the llvm semantics look like, but you're right about the assembly semantics, vminsd (the instruction used in the post) is unfortunately not symettric in it's handling on NaN. https://www.felixcloutier.com/x86/minsd https://www.felixcloutier.com/x86/minsd