PxUnixMathIntrinsics.h

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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
 
#ifndef PXFOUNDATION_PXUNIXINTRINSICS_H
#define PXFOUNDATION_PXUNIXINTRINSICS_H
 
#include "foundation/Px.h"
#include "foundation/PxAssert.h"
 
#if !(PX_LINUX || PX_APPLE_FAMILY)
#error "This file should only be included by Unix builds!!"
#endif
 
#if PX_LINUX && !defined(__CUDACC__) && !PX_EMSCRIPTEN
    // Linux and CUDA compilation does not work with std::isfnite, as it is not marked as CUDA callable
    #include <cmath>
    #ifndef isfinite
        using std::isfinite;
    #endif
#endif
 
#include <math.h>
#include <float.h>
 
#if !PX_DOXYGEN
namespace physx
{
#endif
 
namespace intrinsics
{
PX_CUDA_CALLABLE PX_FORCE_INLINE float abs(float a)
{
    return ::fabsf(a);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float fsel(float a, float b, float c)
{
    return (a >= 0.0f) ? b : c;
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float sign(float a)
{
    return (a >= 0.0f) ? 1.0f : -1.0f;
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float recip(float a)
{
    return 1.0f / a;
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float recipFast(float a)
{
    return 1.0f / a;
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float sqrt(float a)
{
    return ::sqrtf(a);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float recipSqrt(float a)
{
    return 1.0f / ::sqrtf(a);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float recipSqrtFast(float a)
{
    return 1.0f / ::sqrtf(a);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float sin(float a)
{
    return ::sinf(a);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float cos(float a)
{
    return ::cosf(a);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float selectMin(float a, float b)
{
    return a < b ? a : b;
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE float selectMax(float a, float b)
{
    return a > b ? a : b;
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE bool isFinite(float a)
{
    //std::isfinite not recommended as of Feb 2017, since it doesn't work with g++/clang's floating point optimization.
    union localU { PxU32 i; float f; } floatUnion;
    floatUnion.f = a;
    return !((floatUnion.i & 0x7fffffff) >= 0x7f800000);
}
 
PX_CUDA_CALLABLE PX_FORCE_INLINE bool isFinite(double a)
{
    return !!isfinite(a);
}
 
PX_FORCE_INLINE void* memZero(void* dest, uint32_t count)
{
    return memset(dest, 0, count);
}
 
PX_FORCE_INLINE void* memSet(void* dest, int32_t c, uint32_t count)
{
    return memset(dest, c, count);
}
 
PX_FORCE_INLINE void* memCopy(void* dest, const void* src, uint32_t count)
{
    return memcpy(dest, src, count);
}
 
PX_FORCE_INLINE void* memMove(void* dest, const void* src, uint32_t count)
{
    return memmove(dest, src, count);
}
 
} // namespace intrinsics
#if !PX_DOXYGEN
} // namespace physx
#endif
 
#endif // #ifndef PXFOUNDATION_PXUNIXINTRINSICS_H