FMA4
http://agner.org/optimize/blog/read.php?i=838
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.
マジ！？デコード大変じゃない？
http://agner.org/optimize/blog/read.php?i=838
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.
マジ！？デコード大変じゃない？