Function sseCos

src/OpenColorIO/SSE.h:595–600

Cosine function Algorithm Explanation: The function cos() is evaluated by reducing the argument to the domain [-pi/2,pi/2] and then using Chebyshev polynomials to evaluate the function over the restricted range. The sign of the result is then adjusted if the (reduced) input value is on quadrants 2 or 3. This approximation is accurate to 17 bits of mantissa. - x the input angle Return the cosine o

// - x the input angle
// Return the cosine of the angle
inline __m128 sseCos(const __m128 x)
{
    __m128 cos_x, xr, xr2, flip_sign_cos_x;
    __sse_cos__(x, cos_x, xr, xr2, flip_sign_cos_x);
    return cos_x;
}

// Sine function
//