_mm256_mask2_permutex2var_epi16
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512BW
Header File
Instruction
VPERMI2W ymm {k}, ymm, ymm
Synopsis
_mm256_mask2_permutex2var_epi16(__m256i a, __m256i idx, __mmask16 k, __m256i b);
Description
Shuffle 16-bit integers in "a" and "b" across lanes using the corresponding selector and index in "idx", and store the results in "dst" using writemask "k" (elements are copied from "idx" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 15
i := j*16
IF k[j]
off := 16*idx[i+3:i]
dst[i+15:i] := idx[i+4] ? b[off+15:off] : a[off+15:off]
ELSE
dst[i+15:i] := idx[i+15:i]
FI
ENDFOR
dst[MAX:256] := 0