pub unsafe fn _mm256_mask_dbsad_epu8<const IMM8: i32>(
    src: __m256i,
    k: u16,
    a: __m256i,
    b: __m256i
) -> __m256i
🔬This is a nightly-only experimental API. (stdsimd #48556)
Available on x86-64 only.
Expand description

Compute the sum of absolute differences (SADs) of quadruplets of unsigned 8-bit integers in a compared to those in b, and store the 16-bit results in dst using writemask k (elements are copied from src when the corresponding mask bit is not set). Four SADs are performed on four 8-bit quadruplets for each 64-bit lane. The first two SADs use the lower 8-bit quadruplet of the lane from a, and the last two SADs use the uppper 8-bit quadruplet of the lane from a. Quadruplets from b are selected from within 128-bit lanes according to the control in imm8, and each SAD in each 64-bit lane uses the selected quadruplet at 8-bit offsets.

Intel’s documentation