Contributed 3rd Party Builds • Re: Pale Moon for Slackware Linux

Well, the issue is kind of that Dav1d doesn't actually work on SSE2-only CPUs, at least not if it's compiled on a machine that has AVX instructions available. The issue seems to be that it emits AVX instructions on any compiler/machine combo that can, regardless of what you want. Hypothetically, it might work if you compile it on a machine with a CPU that can't support AVX, because that would force the compiler to generate fallback instructions or something, but I have no idea.

This is interesting! In that case, I may just have to give it a go myself. I.e., I'll try compiling with my defaults reversed, and use an AVX-capable box for the SSE2 build. We'll see what happens...

If what you suspect is true, then I should get an "Illegal instruction" error when trying to watch an AV1 video with the resulting PM-sse2 binary.

For the record, this is all just academic for me personally, as I don't watch videos online anyway. Still, I'd like to have all my ducks in a row...