Function vpdpbusd 

fn vpdpbusd<'tcx>(
    ecx: &mut MiriInterpCx<'tcx>,
    src: &OpTy<'tcx>,
    a: &OpTy<'tcx>,
    b: &OpTy<'tcx>,
    dest: &MPlaceTy<'tcx>,
) -> InterpResult<'tcx, ()>

Multiply groups of 4 adjacent pairs of unsigned 8-bit integers in a with corresponding signed 8-bit integers in b, producing 4 intermediate signed 16-bit results. Sum these 4 results with the corresponding 32-bit integer in src (using wrapping arighmetic), and store the packed 32-bit results in dst.

https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm_dpbusd_epi32 https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm256_dpbusd_epi32 https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=_mm512_dpbusd_epi32