Remove x87 fpu function

Author: derselbst

r4300/fpu.h

@@ -32,18 +32,7 @@
 
 #ifdef _MSC_VER
   #define M64P_FPU_INLINE static __inline
-  #include <float.h>
-  typedef enum { FE_TONEAREST = 0, FE_TOWARDZERO, FE_UPWARD, FE_DOWNWARD } eRoundType;
-  static void fesetround(eRoundType RoundType)
-  {
-    static const unsigned int msRound[4] = { _RC_NEAR, _RC_CHOP, _RC_UP, _RC_DOWN };
-    unsigned int oldX87, oldSSE2;
-    __control87_2(msRound[RoundType], _MCW_RC, &oldX87, &oldSSE2);
-  }
-  static __inline double round(double x) { return floor(x + 0.5); }
-  static __inline float roundf(float x) { return (float) floor(x + 0.5); }
-  static __inline double trunc(double x) { return (double) (int) x; }
-  static __inline float truncf(float x) { return (float) (int) x; }
+  #include <fenv.h>
   #define isnan _isnan
 #else
   #define M64P_FPU_INLINE static inline