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+/****************************************************************************
+**
+** Copyright (C) 2008-2012 NVIDIA Corporation.
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt 3D Studio.
+**
+** $QT_BEGIN_LICENSE:GPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 or (at your option) any later version
+** approved by the KDE Free Qt Foundation. The licenses are as published by
+** the Free Software Foundation and appearing in the file LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QT3DS_FOUNDATION_QT3DS_LINUX_INTRINSICS_H
+#define QT3DS_FOUNDATION_QT3DS_LINUX_INTRINSICS_H
+
+#include "foundation/Qt3DS.h"
+#include "foundation/Qt3DSAssert.h"
+
+#if !(defined QT3DS_LINUX || defined QT3DS_ANDROID || defined QT3DS_APPLE || defined QT3DS_QNX)
+#error "This file should only be included by Linux builds!!"
+#endif
+
+#include <cmath>
+#include <math.h>
+#include <float.h>
+#include <string.h>
+
+namespace qt3ds {
+namespace intrinsics {
+ //! \brief platform-specific absolute value
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float abs(float a) { return ::fabs(a); }
+
+ //! \brief platform-specific select float
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float fsel(float a, float b, float c)
+ {
+ return (a >= 0.0f) ? b : c;
+ }
+
+ //! \brief platform-specific sign
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float sign(float a) { return (a >= 0.0f) ? 1.0f : -1.0f; }
+
+ //! \brief platform-specific reciprocal
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float recip(float a) { return 1.0f / a; }
+
+ //! \brief platform-specific reciprocal estimate
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float recipFast(float a) { return 1.0f / a; }
+
+ //! \brief platform-specific square root
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float sqrt(float a) { return ::sqrtf(a); }
+
+ //! \brief platform-specific reciprocal square root
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float recipSqrt(float a) { return 1.0f / ::sqrtf(a); }
+
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float recipSqrtFast(float a) { return 1.0f / ::sqrtf(a); }
+
+ //! \brief platform-specific sine
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float sin(float a) { return ::sinf(a); }
+
+ //! \brief platform-specific cosine
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float cos(float a) { return ::cosf(a); }
+
+ //! \brief platform-specific minimum
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float selectMin(float a, float b) { return a < b ? a : b; }
+
+ //! \brief platform-specific maximum
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE float selectMax(float a, float b) { return a > b ? a : b; }
+
+ //! \brief platform-specific finiteness check (not INF or NAN)
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE bool isFinite(float a) { return std::isfinite(a); }
+
+ //! \brief platform-specific finiteness check (not INF or NAN)
+ QT3DS_CUDA_CALLABLE QT3DS_FORCE_INLINE bool isFinite(double a) { return std::isfinite(a); }
+ QT3DS_FORCE_INLINE void memoryBarrier()
+ {
+#if 0 //!defined (QT3DS_ARM)
+ smp_mb();
+#endif
+ }
+
+ /*!
+ Return the index of the highest set bit. Undefined for zero arg.
+ */
+ QT3DS_INLINE QT3DSU32 highestSetBitUnsafe(QT3DSU32 v)
+ {
+
+ // http://graphics.stanford.edu/~seander/bithacks.html
+ static const QT3DSU32 MultiplyDeBruijnBitPosition[32] = { 0, 9, 1, 10, 13, 21, 2, 29,
+ 11, 14, 16, 18, 22, 25, 3, 30,
+ 8, 12, 20, 28, 15, 17, 24, 7,
+ 19, 27, 23, 6, 26, 5, 4, 31 };
+
+ v |= v >> 1; // first round up to one less than a power of 2
+ v |= v >> 2;
+ v |= v >> 4;
+ v |= v >> 8;
+ v |= v >> 16;
+
+ return MultiplyDeBruijnBitPosition[(QT3DSU32)(v * 0x07C4ACDDU) >> 27];
+ }
+
+ /*!
+ Return the index of the highest set bit. Undefined for zero arg.
+ */
+ QT3DS_INLINE QT3DSI32 lowestSetBitUnsafe(QT3DSU32 v)
+ {
+ // http://graphics.stanford.edu/~seander/bithacks.html
+ static const QT3DSU32 MultiplyDeBruijnBitPosition[32] = { 0, 1, 28, 2, 29, 14, 24, 3,
+ 30, 22, 20, 15, 25, 17, 4, 8,
+ 31, 27, 13, 23, 21, 19, 16, 7,
+ 26, 12, 18, 6, 11, 5, 10, 9 };
+ QT3DSI32 w = v;
+ return MultiplyDeBruijnBitPosition[(QT3DSU32)((w & -w) * 0x077CB531U) >> 27];
+ }
+
+ /*!
+ Returns the index of the highest set bit. Undefined for zero arg.
+ */
+ QT3DS_INLINE QT3DSU32 countLeadingZeros(QT3DSU32 v)
+ {
+ QT3DSI32 result = 0;
+#ifdef _INTEGRITYPLATFORM
+ QT3DSU32 testBit = (1U << 31);
+#else
+ QT3DSU32 testBit = (1 << 31);
+#endif
+ while ((v & testBit) == 0 && testBit != 0)
+ result++, testBit >>= 1;
+ return result;
+ }
+
+ /*!
+ Sets \c count bytes starting at \c dst to zero.
+ */
+ QT3DS_FORCE_INLINE void *memZero(void *QT3DS_RESTRICT dest, QT3DSU32 count)
+ {
+ return memset(dest, 0, count);
+ }
+
+ /*!
+ Sets \c count bytes starting at \c dst to \c c.
+ */
+ QT3DS_FORCE_INLINE void *memSet(void *QT3DS_RESTRICT dest, QT3DSI32 c, QT3DSU32 count)
+ {
+ return memset(dest, c, count);
+ }
+
+ /*!
+ Copies \c count bytes from \c src to \c dst. User memMove if regions overlap.
+ */
+ QT3DS_FORCE_INLINE void *memCopy(void *QT3DS_RESTRICT dest, const void *QT3DS_RESTRICT src, QT3DSU32 count)
+ {
+ return memcpy(dest, src, count);
+ }
+
+ /*!
+ Copies \c count bytes from \c src to \c dst. Supports overlapping regions.
+ */
+ QT3DS_FORCE_INLINE void *memMove(void *QT3DS_RESTRICT dest, const void *QT3DS_RESTRICT src, QT3DSU32 count)
+ {
+ return memmove(dest, src, count);
+ }
+
+ /*!
+ Set 128B to zero starting at \c dst+offset. Must be aligned.
+ */
+ QT3DS_FORCE_INLINE void memZero128(void *QT3DS_RESTRICT dest, QT3DSU32 offset = 0)
+ {
+ QT3DS_ASSERT(((size_t(dest) + offset) & 0x7f) == 0);
+ memSet((char *QT3DS_RESTRICT)dest + offset, 0, 128);
+ }
+
+ /*!
+ Prefetch aligned 128B around \c ptr+offset.
+ */
+ QT3DS_FORCE_INLINE void prefetch128(const void *, QT3DSU32 = 0) {}
+
+ /*!
+ Prefetch \c count bytes starting at \c ptr.
+ */
+ QT3DS_FORCE_INLINE void prefetch(const void *ptr, QT3DSU32 count = 0)
+ {
+ for (QT3DSU32 i = 0; i <= count; i += 128)
+ prefetch128(ptr, i);
+ }
+
+ //! \brief platform-specific floor
+ QT3DS_FORCE_INLINE float floatFloor(float x) { return ::floorf(x); }
+} // namespace intrinsics
+} // namespace qt3ds
+
+#endif
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