Function scale255_S32_S32

src/cpu/kernels/CpuMulKernel.cpp:159–167

Scales a given vector by 1/255. * * @note This does not work for all cases. e.g. for float of 0.49999999999999994 and large floats. * * @param in Input vector to scale. * @return Scaled dst rounded to nearest (round half up). */

 * @return   Scaled dst rounded to nearest (round half up).
 */
inline int32x4_t scale255_S32_S32(int32x4_t in)
{
    // Scale
    const float32x4_t tmp = vmulq_f32(vcvtq_f32_s32(in), scale255_constant_f32q);
    // Round to nearest (round half up)
    // Add +0.5 for all values
    // Afterwards vcvt rounds toward zero
    return vcvtq_s32_f32(vaddq_f32(tmp, positive_round_f32q));
}

inline uint16x8_t scale255_U16_U16(uint16x8_t in)
{