Revision control
Copy as Markdown
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// SPDX-FileCopyrightText: Copyright (c) 2008-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
// SPDX-License-Identifier: Apache-2.0
#ifndef PXFOUNDATION_PXUNIXFPU_H
#define PXFOUNDATION_PXUNIXFPU_H
#include "foundation/PxPreprocessor.h"
#if PX_LINUX || PX_OSX
#if PX_X86 || PX_X64
#if PX_EMSCRIPTEN
#include <emmintrin.h>
#endif
#include <xmmintrin.h>
#elif PX_NEON
#include <arm_neon.h>
#endif
PX_INLINE physx::PxSIMDGuard::PxSIMDGuard(bool enable)
#if !PX_EMSCRIPTEN && (PX_X86 || PX_X64)
: mEnabled(enable)
#endif
{
#if !PX_EMSCRIPTEN && (PX_X86 || PX_X64)
if(enable)
{
mControlWord = _mm_getcsr();
// set default (disable exceptions: _MM_MASK_MASK) and FTZ (_MM_FLUSH_ZERO_ON), DAZ (_MM_DENORMALS_ZERO_ON: (1<<6))
_mm_setcsr(_MM_MASK_MASK | _MM_FLUSH_ZERO_ON | (1 << 6));
}
else
{
PX_UNUSED(enable);
PX_ASSERT(_mm_getcsr() & _MM_FLUSH_ZERO_ON);
PX_ASSERT(_mm_getcsr() & (1 << 6));
PX_ASSERT(_mm_getcsr() & _MM_MASK_MASK);
}
#endif
}
PX_INLINE physx::PxSIMDGuard::~PxSIMDGuard()
{
#if !PX_EMSCRIPTEN && (PX_X86 || PX_X64)
if(mEnabled)
{
// restore control word and clear exception flags
// (setting exception state flags cause exceptions on the first following fp operation)
_mm_setcsr(mControlWord & PxU32(~_MM_EXCEPT_MASK));
}
#endif
}
#else
#error No SIMD implementation for this unix platform.
#endif // PX_LINUX || PX_OSX
#endif