E:/p4/sw/physx/PxShared/1.0/trunk/src/foundation/include/windows/PsWindowsFPU.h
Go to the documentation of this file.00001 // This code contains NVIDIA Confidential Information and is disclosed to you 00002 // under a form of NVIDIA software license agreement provided separately to you. 00003 // 00004 // Notice 00005 // NVIDIA Corporation and its licensors retain all intellectual property and 00006 // proprietary rights in and to this software and related documentation and 00007 // any modifications thereto. Any use, reproduction, disclosure, or 00008 // distribution of this software and related documentation without an express 00009 // license agreement from NVIDIA Corporation is strictly prohibited. 00010 // 00011 // ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES 00012 // NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO 00013 // THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT, 00014 // MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE. 00015 // 00016 // Information and code furnished is believed to be accurate and reliable. 00017 // However, NVIDIA Corporation assumes no responsibility for the consequences of use of such 00018 // information or for any infringement of patents or other rights of third parties that may 00019 // result from its use. No license is granted by implication or otherwise under any patent 00020 // or patent rights of NVIDIA Corporation. Details are subject to change without notice. 00021 // This code supersedes and replaces all information previously supplied. 00022 // NVIDIA Corporation products are not authorized for use as critical 00023 // components in life support devices or systems without express written approval of 00024 // NVIDIA Corporation. 00025 // 00026 // Copyright (c) 2008-2014 NVIDIA Corporation. All rights reserved. 00027 // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved. 00028 // Copyright (c) 2001-2004 NovodeX AG. All rights reserved. 00029 00030 #ifndef PSFOUNDATION_PSWINDOWSFPU_H 00031 #define PSFOUNDATION_PSWINDOWSFPU_H 00032 00033 PX_INLINE physx::shdfnd::SIMDGuard::SIMDGuard() 00034 { 00035 #if !PX_ARM 00036 mControlWord = _mm_getcsr(); 00037 // set default (disable exceptions: _MM_MASK_MASK) and FTZ (_MM_FLUSH_ZERO_ON), DAZ (_MM_DENORMALS_ZERO_ON: (1<<6)) 00038 _mm_setcsr(_MM_MASK_MASK | _MM_FLUSH_ZERO_ON | (1 << 6)); 00039 #endif 00040 } 00041 00042 PX_INLINE physx::shdfnd::SIMDGuard::~SIMDGuard() 00043 { 00044 #if !PX_ARM 00045 // restore control word and clear any exception flags 00046 // (setting exception state flags cause exceptions on the first following fp operation) 00047 _mm_setcsr(mControlWord & ~_MM_EXCEPT_MASK); 00048 #endif 00049 } 00050 00051 #endif // #ifndef PSFOUNDATION_PSWINDOWSFPU_H
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