_mm256_mask_shuffle_epi8
Classification
AVX-512, Swizzle, CPUID Test: AVX512BW
Header File
immintrin.h
Instruction
VPSHUFB ymm {k}, ymm, ymm
Synopsis
 _mm256_mask_shuffle_epi8(__m256i src, __mmask32 k, __m256i a, __m256i b);
Description
Shuffle packed 8-bit integers in "a" according to shuffle control mask in the corresponding 8-bit element of "b", and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 31
	i := j*8
	IF k[j]
		IF b[i+7] == 1
			dst[i+7:i] := 0
		ELSE
			index[4:0] := b[i+3:i] + (j & 0x10)
			dst[i+7:i] := a[index*8+7:index*8]
		FI
	ELSE
		dst[i+7:i] := src[i+7:i]
	FI
ENDFOR
dst[MAX:256] := 0