3 ms·
The most practically interesting part: >FMA4 is not officially supported on Ryzen, but I found that the FMA4 instructions actually work correctly on Ryzen, eve
by anonymfus 10y ago
The most practically interesting part:
>FMA4 is not officially supported on Ryzen, but I found that the FMA4 instructions actually work correctly on Ryzen, even though the CPUID instruction says that FMA4 is not supported.
- wsxcde 10y agoWhich means there are rare bugs in the FMA4 they've not been able to iron out. So they decided to turn it off at release time using a chicken bit.