PxVecMathSSE.h

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#ifndef PX_VEC_MATH_SSE_H
#define PX_VEC_MATH_SSE_H

#if !PX_DOXYGEN
namespace physx
{
#endif
namespace aos
{

namespace
{
    const PX_ALIGN(16, PxF32) minus1w[4] = { 0.0f, 0.0f, 0.0f, -1.0f };
}

PX_FORCE_INLINE void QuatGetMat33V(const QuatVArg q, Vec3V& column0, Vec3V& column1, Vec3V& column2)
{
    const __m128 q2 = V4Add(q, q);
    const __m128 qw2 = V4MulAdd(q2, V4GetW(q), _mm_load_ps(minus1w));           // (2wx, 2wy, 2wz, 2ww-1)
    const __m128 nw2 = Vec3V_From_Vec4V(V4Neg(qw2));                            // (-2wx, -2wy, -2wz, 0)
    const __m128 v = Vec3V_From_Vec4V(q);

    const __m128 a0 = _mm_shuffle_ps(qw2, nw2, _MM_SHUFFLE(3, 1, 2, 3));        // (2ww-1, 2wz, -2wy, 0)
    column0 = V4MulAdd(v, V4GetX(q2), a0);

    const __m128 a1 = _mm_shuffle_ps(qw2, nw2, _MM_SHUFFLE(3, 2, 0, 3));        // (2ww-1, 2wx, -2wz, 0)
    column1 = V4MulAdd(v, V4GetY(q2), _mm_shuffle_ps(a1, a1, _MM_SHUFFLE(3, 1, 0, 2)));

    const __m128 a2 = _mm_shuffle_ps(qw2, nw2, _MM_SHUFFLE(3, 0, 1, 3));        // (2ww-1, 2wy, -2wx, 0)
    column2 = V4MulAdd(v, V4GetZ(q2), _mm_shuffle_ps(a2, a2, _MM_SHUFFLE(3, 0, 2, 1)));
}

} // namespace aos
#if !PX_DOXYGEN
} // namespace physx
#endif


#endif