Re: Tumbleweed - Move to x86-64-v2 (plus mitigation plan and call for help)

Am 05.12.22 um 09:21 schrieb Martin Jambor:

The fact is that -v3 baseline means better floating point performance out of the box.

Are the VEX-prefixed single-data instructions really faster, i.e. addsd vs vaddsd or mulsd vs vmulsd? I thought compilers emit the latter preferably if available only to avoid the need for vzeroupper and not because they're faster, but I admit I haven't benchmarked this. Aaron