Function core_arch::x86::_mm256_mpsadbw_epu8

pub unsafe fn _mm256_mpsadbw_epu8(a: __m256i, b: __m256i, imm8: i32) -> __m256i

This is supported on x86 and target feature avx2 only.

Computes the sum of absolute differences (SADs) of quadruplets of unsigned 8-bit integers in a compared to those in b, and stores the 16-bit results in dst. Eight SADs are performed for each 128-bit lane using one quadruplet from b and eight quadruplets from a. One quadruplet is selected from b starting at on the offset specified in imm8. Eight quadruplets are formed from sequential 8-bit integers selected from a starting at the offset specified in imm8.

Intel's documentation