MacPlatformMath.h

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// Copyright Epic Games, Inc. All Rights Reserved.
 
/*=============================================================================================
    MacPlatformMath.h: Mac platform Math functions
==============================================================================================*/
 
#pragma once
#include "Clang/ClangPlatformMath.h"
#include "Mac/MacSystemIncludes.h"
 
 
#if PLATFORM_MAC_X86
    #include <smmintrin.h>
    #include "Math/UnrealPlatformMathSSE4.h"
 
    /*
    * Mac implementation of the Math OS functions
    **/
    struct FMacPlatformMath : public TUnrealPlatformMathSSE4Base<FClangPlatformMath>
    {
    #if PLATFORM_ENABLE_POPCNT_INTRINSIC
        static UE_FORCEINLINE_HINT int32 CountBits(uint64 Bits)
        {
            return __builtin_popcountll(Bits);
        }
    #endif
 
        static UE_FORCEINLINE_HINT bool IsNaN( float A ) { return isnan(A) != 0; }
        static UE_FORCEINLINE_HINT bool IsNaN(double A) { return isnan(A) != 0; }
        static UE_FORCEINLINE_HINT bool IsFinite(float A) { return isfinite(A); }
        static UE_FORCEINLINE_HINT bool IsFinite(double A) { return isfinite(A); }
    };
 
    typedef FMacPlatformMath FPlatformMath;
#else
    typedef FClangPlatformMath FPlatformMath;
#endif