diff options
Diffstat (limited to 'Source/Core/Common/Src/x64CPUDetect.cpp')
| -rw-r--r-- | Source/Core/Common/Src/x64CPUDetect.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/Source/Core/Common/Src/x64CPUDetect.cpp b/Source/Core/Common/Src/x64CPUDetect.cpp index 182cca5224..d6f36eb142 100644 --- a/Source/Core/Common/Src/x64CPUDetect.cpp +++ b/Source/Core/Common/Src/x64CPUDetect.cpp @@ -162,6 +162,7 @@ void CPUInfo::Detect() if ((cpu_id[2] >> 20) & 1) bSSE4_2 = true; if ((cpu_id[2] >> 25) & 1) bAES = true; + // To check DAZ support, we first need to check FXSAVE support. if ((cpu_id[3] >> 24) & 1) { // We can use FXSAVE. @@ -181,7 +182,12 @@ void CPUInfo::Detect() // lowest byte of MXCSR_MASK if ((fx_state[0x1C] >> 6) & 1) - bDAZ = true; + { + // On x86, the FTZ field (supported since SSE1) only flushes denormal _outputs_ to zero, + // now that we checked DAZ support (flushing denormal _inputs_ to zero), + // we can set our generic flag. + bFlushToZero = true; + } } // AVX support requires 3 separate checks: |