_mm_mask_mullo_epi64
Classification
AVX-512, Arithmetic, CPUID Test: AVX512DQ
Header File
Instruction
VPMULLQ xmm {k}, xmm, xmm
Synopsis
_mm_mask_mullo_epi64(__m128i src, __mmask8 k, __m128i a, __m128i b);
Description
Multiply the packed 64-bit integers in "a" and "b", producing intermediate 128-bit integers, and store the low 64 bits of the intermediate integers in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 1
i := j*64
IF k[j]
tmp[127:0] := a[i+63:i] * b[i+63:i]
dst[i+63:i] := tmp[63:0]
ELSE
dst[i+63:i] := src[i+63:i]
FI
ENDFOR
dst[MAX:128] := 0