SQRT_2            349 modules/core/src/opencl/fft.cl         a5 = (CT)(SQRT_2) * (CT)(a5.x + a5.y, -a5.x + a5.y);
SQRT_2            353 modules/core/src/opencl/fft.cl         b7 = (CT)(SQRT_2) * (CT)(-b7.x + b7.y, -b7.x - b7.y);