_mm_mask_testn_epi8_mask
Classification
AVX-512, Compare, CPUID Test: AVX512BW
Header File
Instruction
VPTESTNMB k {k}, xmm, xmm
Synopsis
_mm_mask_testn_epi8_mask(__mmask16 k1, __m128i a, __m128i b);
Description
Compute the bitwise NAND of packed 8-bit integers in "a" and "b", producing intermediate 8-bit values, and set the corresponding bit in result mask "k" (subject to writemask "k") if the intermediate value is zero.
Operation
FOR j := 0 to 15
i := j*8
IF k1[j]
k[j] := ((a[i+7:i] AND b[i+7:i]) == 0) ? 1 : 0
ELSE
k[j] := 0
FI
ENDFOR
k[MAX:16] := 0