_mm_mask_mulhi_epi16
Classification
AVX-512, Arithmetic, CPUID Test: AVX512BW
Header File
Instruction
VPMULHW xmm {k}, xmm, xmm
Synopsis
_mm_mask_mulhi_epi16(__m128i src, __mmask8 k, __m128i a, __m128i b);
Description
Multiply the packed signed 16-bit integers in "a" and "b", producing intermediate 32-bit integers, and store the high 16 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 7
i := j*16
IF k[j]
tmp[31:0] := SignExtend32(a[i+15:i]) * SignExtend32(b[i+15:i])
dst[i+15:i] := tmp[31:16]
ELSE
dst[i+15:i] := src[i+15:i]
FI
ENDFOR
dst[MAX:128] := 0