x64: detect FMA support

dolphin-emu · Nov 13, 2013 · 6054129 · 6054129
1 parent 2fecb03
commit 6054129
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diff --git a/Source/Core/Common/Src/CPUDetect.h b/Source/Core/Common/Src/CPUDetect.h
@@ -41,6 +41,7 @@ struct CPUInfo
 	bool bLZCNT;
 	bool bSSE4A;
 	bool bAVX;
+	bool bFMA;
 	bool bAES;
 	bool bLAHFSAHF64;
 	bool bLongMode;

diff --git a/Source/Core/Common/Src/x64CPUDetect.cpp b/Source/Core/Common/Src/x64CPUDetect.cpp
@@ -169,7 +169,11 @@ void CPUInfo::Detect()
 		if (((cpu_id[2] >> 28) & 1) && ((cpu_id[2] >> 27) & 1))
 		{
 			if ((_xgetbv(_XCR_XFEATURE_ENABLED_MASK) & 0x6) == 0x6)
+			{
 				bAVX = true;
+				if ((cpu_id[2] >> 12) & 1)
+					bFMA = true;
+			}
 		}
 	}
 	if (max_ex_fn >= 0x80000004) {
@@ -225,6 +229,7 @@ std::string CPUInfo::Summarize()
 	if (bSSE4_2) sum += ", SSE4.2";
 	if (HTT) sum += ", HTT";
 	if (bAVX) sum += ", AVX";
+	if (bFMA) sum += ", FMA";
 	if (bAES) sum += ", AES";
 	if (bLongMode) sum += ", 64-bit support";
 	return sum;