PxFPU.h

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// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
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#ifndef PX_FPU_H
#define PX_FPU_H
 
#include "foundation/PxIntrinsics.h"
#include "foundation/PxAssert.h"
#include "foundation/PxFoundationConfig.h"
 
#define PX_IR(x) ((PxU32&)(x))  // integer representation of a floating-point value.
#define PX_SIR(x) ((PxI32&)(x)) // signed integer representation of a floating-point value.
#define PX_FR(x) ((PxReal&)(x))     // floating-point representation of a integer value.
 
#define PX_FPU_GUARD PxFPUGuard scopedFpGuard;
#define PX_SIMD_GUARD PxSIMDGuard scopedFpGuard;
#define PX_SIMD_GUARD_CNDT(x) PxSIMDGuard scopedFpGuard(x);
 
#if !PX_DOXYGEN
namespace physx
{
#endif
// sets the default SDK state for scalar and SIMD units
class PX_FOUNDATION_API PxFPUGuard
{
  public:
    PxFPUGuard();  // set fpu control word for PhysX
    ~PxFPUGuard(); // restore fpu control word
  private:
    PxU32 mControlWords[8];
};
 
// sets default SDK state for simd unit only, lighter weight than FPUGuard
class PxSIMDGuard
{
  public:
    PX_INLINE PxSIMDGuard(bool enable = true);  // set simd control word for PhysX
    PX_INLINE ~PxSIMDGuard(); // restore simd control word
  private:
#if !(PX_LINUX || PX_OSX) || (!PX_EMSCRIPTEN && PX_INTEL_FAMILY)
  PxU32         mControlWord;
  bool          mEnabled;
#endif
};
 
PX_FOUNDATION_API void PxEnableFPExceptions();
 
PX_FOUNDATION_API void PxDisableFPExceptions();
 
#if !PX_DOXYGEN
} // namespace physx
#endif
 
#if PX_WINDOWS_FAMILY
#include "foundation/windows/PxWindowsFPU.h"
#elif (PX_LINUX && PX_SSE2) || PX_OSX
#include "foundation/unix/PxUnixFPU.h"
#else
PX_INLINE physx::PxSIMDGuard::PxSIMDGuard(bool)
{
}
PX_INLINE physx::PxSIMDGuard::~PxSIMDGuard()
{
}
#endif
 
#endif