Function _mm_sad_epu8

pub unsafe fn _mm_sad_epu8(a: __m128i, b: __m128i) -> __m128i

Available on (x86 or x86-64) and target feature sse2 and x86-64 only.

Sum the absolute differences of packed unsigned 8-bit integers.

Computes the absolute differences of packed unsigned 8-bit integers in a and b, then horizontally sum each consecutive 8 differences to produce two unsigned 16-bit integers, and pack these unsigned 16-bit integers in the low 16 bits of 64-bit elements returned.

Intel’s documentation