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pxshared/include/foundation/unix/PxUnixIntrinsics.h

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+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//  * Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+//  * Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in the
+//    documentation and/or other materials provided with the distribution.
+//  * Neither the name of NVIDIA CORPORATION nor the names of its
+//    contributors may be used to endorse or promote products derived
+//    from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+// PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Copyright (c) 2008-2021 NVIDIA Corporation. All rights reserved.
+// 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/PxSharedAssert.h"
+
+#if !(PX_LINUX || PX_ANDROID || PX_PS4 || PX_APPLE_FAMILY)
+#error "This file should only be included by Unix builds!!"
+#endif
+
+#if (PX_LINUX || PX_ANDROID) && !defined(__CUDACC__) && !PX_EMSCRIPTEN
+    // Linux/android 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>
+
+namespace physx
+{
+namespace intrinsics
+{
+//! \brief platform-specific absolute value
+PX_CUDA_CALLABLE PX_FORCE_INLINE float abs(float a)
+{
+	return ::fabsf(a);
+}
+
+//! \brief platform-specific select float
+PX_CUDA_CALLABLE PX_FORCE_INLINE float fsel(float a, float b, float c)
+{
+	return (a >= 0.0f) ? b : c;
+}
+
+//! \brief platform-specific sign
+PX_CUDA_CALLABLE PX_FORCE_INLINE float sign(float a)
+{
+	return (a >= 0.0f) ? 1.0f : -1.0f;
+}
+
+//! \brief platform-specific reciprocal
+PX_CUDA_CALLABLE PX_FORCE_INLINE float recip(float a)
+{
+	return 1.0f / a;
+}
+
+//! \brief platform-specific reciprocal estimate
+PX_CUDA_CALLABLE PX_FORCE_INLINE float recipFast(float a)
+{
+	return 1.0f / a;
+}
+
+//! \brief platform-specific square root
+PX_CUDA_CALLABLE PX_FORCE_INLINE float sqrt(float a)
+{
+	return ::sqrtf(a);
+}
+
+//! \brief platform-specific reciprocal square root
+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);
+}
+
+//! \brief platform-specific sine
+PX_CUDA_CALLABLE PX_FORCE_INLINE float sin(float a)
+{
+	return ::sinf(a);
+}
+
+//! \brief platform-specific cosine
+PX_CUDA_CALLABLE PX_FORCE_INLINE float cos(float a)
+{
+	return ::cosf(a);
+}
+
+//! \brief platform-specific minimum
+PX_CUDA_CALLABLE PX_FORCE_INLINE float selectMin(float a, float b)
+{
+	return a < b ? a : b;
+}
+
+//! \brief platform-specific maximum
+PX_CUDA_CALLABLE PX_FORCE_INLINE float selectMax(float a, float b)
+{
+	return a > b ? a : b;
+}
+
+//! \brief platform-specific finiteness check (not INF or NAN)
+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);
+}
+
+//! \brief platform-specific finiteness check (not INF or NAN)
+PX_CUDA_CALLABLE PX_FORCE_INLINE bool isFinite(double a)
+{
+	return !!isfinite(a);
+}
+
+/*!
+Sets \c count bytes starting at \c dst to zero.
+*/
+PX_FORCE_INLINE void* memZero(void* dest, uint32_t count)
+{
+	return memset(dest, 0, count);
+}
+
+/*!
+Sets \c count bytes starting at \c dst to \c c.
+*/
+PX_FORCE_INLINE void* memSet(void* dest, int32_t c, uint32_t count)
+{
+	return memset(dest, c, count);
+}
+
+/*!
+Copies \c count bytes from \c src to \c dst. User memMove if regions overlap.
+*/
+PX_FORCE_INLINE void* memCopy(void* dest, const void* src, uint32_t count)
+{
+	return memcpy(dest, src, count);
+}
+
+/*!
+Copies \c count bytes from \c src to \c dst. Supports overlapping regions.
+*/
+PX_FORCE_INLINE void* memMove(void* dest, const void* src, uint32_t count)
+{
+	return memmove(dest, src, count);
+}
+
+/*!
+Set 128B to zero starting at \c dst+offset. Must be aligned.
+*/
+PX_FORCE_INLINE void memZero128(void* dest, uint32_t offset = 0)
+{
+	PX_SHARED_ASSERT(((size_t(dest) + offset) & 0x7f) == 0);
+	memSet(reinterpret_cast<char*>(dest) + offset, 0, 128);
+}
+
+} // namespace intrinsics
+} // namespace physx
+
+#endif // #ifndef PXFOUNDATION_PXUNIXINTRINSICS_H