_mm256_mask_test_epi8_mask
Classification
AVX-512, Compare, CPUID Test: AVX512BW
Header File
immintrin.h
Instruction
VPTESTMB k {k}, ymm, ymm
Synopsis
 _mm256_mask_test_epi8_mask(__mmask32 k1, __m256i a, __m256i b);
Description
Compute the bitwise AND 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 non-zero.
Operation
FOR j := 0 to 31
	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:32] := 0