diff --git a/Source/Core/Common/x64FPURoundMode.cpp b/Source/Core/Common/x64FPURoundMode.cpp
index 5d5261346e..1dd2fd18f0 100644
--- a/Source/Core/Common/x64FPURoundMode.cpp
+++ b/Source/Core/Common/x64FPURoundMode.cpp
@@ -2,6 +2,8 @@
 // Licensed under GPLv2
 // Refer to the license.txt file included.
 
+#include <cfenv>
+
 #include "Common/Common.h"
 #include "Common/CPUDetect.h"
 #include "Common/FPURoundMode.h"
@@ -20,41 +22,18 @@ namespace FPURoundMode
 
 	void SetRoundMode(int mode)
 	{
-		// Set FPU rounding mode to mimic the PowerPC's
-		#ifdef _M_X86_32
-			// This shouldn't really be needed anymore since we use SSE
-		#ifdef _WIN32
-			const int table[4] =
-			{
-				_RC_NEAR,
-				_RC_CHOP,
-				_RC_UP,
-				_RC_DOWN
-			};
-			_set_controlfp(_MCW_RC, table[mode]);
-		#else
-			const unsigned short X87_ROUND_MASK = 3 << 10;
-			const unsigned short x87_rounding_table[] =
-			{
-				0 << 10, // nearest
-				3 << 10, // zero
-				2 << 10, // +inf
-				1 << 10, // -inf
-			};
-			unsigned short _mode;
-			asm ("fstcw %0" : "=m" (_mode));
-			_mode = (_mode & ~X87_ROUND_MASK) | x87_rounding_table[mode];
-			asm ("fldcw %0" : : "m" (_mode));
-		#endif
-		#endif
+		// Convert PowerPC to native rounding mode.
+		const int rounding_mode_lut[] = {
+			FE_TONEAREST,
+			FE_TOWARDZERO,
+			FE_UPWARD,
+			FE_DOWNWARD
+		};
+		fesetround(rounding_mode_lut[mode]);
 	}
 
 	void SetPrecisionMode(PrecisionMode mode)
 	{
-		#ifdef _M_X86_32
-			// sets the floating-point lib to 53-bit
-			// PowerPC has a 53bit floating pipeline only
-			// eg: sscanf is very sensitive
 		#ifdef _WIN32
 			_control87(_PC_53, MCW_PC);
 		#else
@@ -64,14 +43,10 @@ namespace FPURoundMode
 				2 << 8, // 53 bits
 				3 << 8, // 64 bits
 			};
-			unsigned short _mode;
-			asm ("fstcw %0" : "=m" (_mode));
-			_mode = (_mode & ~PRECISION_MASK) | precision_table[mode];
-			asm ("fldcw %0" : : "m" (_mode));
-		#endif
-		#else
-			//x64 doesn't need this - fpu is done with SSE
-			//but still - set any useful sse options here
+			unsigned short cw;
+			asm ("fnstcw %0" : "=m" (cw));
+			cw = (cw & ~PRECISION_MASK) | precision_table[mode];
+			asm ("fldcw %0" : : "m" (cw));
 		#endif
 	}