7 ms·
Can someone give a bit of the why on this one? Is there something wrong with AVX or is this a run on other chips thing? I'm at a bit of a loss on the history.
by protomyth 10y ago
Can someone give a bit of the why on this one? Is there something wrong with AVX or is this a run on other chips thing? I'm at a bit of a loss on the history.
- yuhong 10y agoAVX is normally 256-bit, but it also allows 128-bit instructions with a VEX prefix. Benefits of that include three operands and unaligned access, as well as higher performance when mixed with 256-bit instructions. Of course, you need a AVX-capable CPU and an OS that support AVX XSAVE to be able to use them.
- DeepYogurt 10y agoThe issue might be due to not all intel chips have AVX support. That said, many have hardware AES support so.... alternate code path?
- dogma1138 10y agoAES-NI and AVX were proposed by AMD and Intel at the same time, and were introduced in the same generation of CPUs. I have a strong feeling that they are interconnected.