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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2017 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
+
+#pragma once
+
+#include "Simd.h"
+
+// platform specific helpers
+
+namespace nv
+{
+namespace cloth
+{
+
+inline uint32_t findBitSet(uint32_t mask);
+
+// intFloor(-1.0f) returns -2 on SSE and NEON!
+inline Simd4i intFloor(const Simd4f& v);
+
+inline Simd4i horizontalOr(const Simd4i& mask);
+
+template <typename>
+struct Gather;
+
+#if NV_SIMD_SIMD
+template <>
+struct Gather<Simd4i>
+{
+	inline Gather(const Simd4i& index);
+	inline Simd4i operator()(const Simd4i*) const;
+
+#if NV_SIMD_SSE2
+	Simd4i mSelectQ, mSelectD, mSelectW;
+	static const Simd4i sIntSignBit;
+	static const Simd4i sSignedMask;
+#elif NV_SIMD_NEON
+	Simd4i mPermute;
+	static const Simd4i sPack;
+	static const Simd4i sOffset;
+	static const Simd4i sShift;
+	static const Simd4i sMask;
+#endif
+	Simd4i mOutOfRange;
+};
+#endif
+
+} // namespace cloth
+} // namespace nv
+
+#if NV_SIMD_SSE2
+#include "sse2/SwCollisionHelpers.h"
+#elif NV_SIMD_NEON
+#include "neon/SwCollisionHelpers.h"
+#endif
+
+#if NV_SIMD_SCALAR
+#include "scalar/SwCollisionHelpers.h"
+#endif