3 ms·
Skylake might have 2x 256 bit FMA, but it still only has 1x 256 bit non-fused add, the same as Zen.
by snovv_crash 10y ago
Skylake might have 2x 256 bit FMA, but it still only has 1x 256 bit non-fused add, the same as Zen.
- gpderetta 10y agoyou can of course use the FMA as an add unit (with a slightly longer latency). IIRC Kabylake has the same latency (4 cycles) and throughput (2 * 256 bits) for add, mul and mad.