Revision control
++ // 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