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 PX_WINDOWS_FPU_H
++ #define PX_WINDOWS_FPU_H
++
++ PX_INLINE physx::PxSIMDGuard::PxSIMDGuard(bool enable) : mEnabled(enable)
++ {
++ #if !PX_ARM && !PX_A64
++ 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_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_ARM && !PX_A64
++ if (mEnabled)
++ {
++ // restore control word and clear any exception flags
++ // (setting exception state flags cause exceptions on the first following fp operation)
++ _mm_setcsr(mControlWord & ~_MM_EXCEPT_MASK);
++ }
++ #endif
++ }
++
++ #endif
++