VPCMPUB - Packed CoMPare Unsigned Byte (imm8=4)

VPCMPUB k1{k2}, xmm2, xmm3/m128, 4    (V5+BW+VL
__mmask16 _mm_cmpneq_epu8_mask(__m128i a, __m128i b)
__mmask16 _mm_mask_cmpneq_epu8_mask(__mmask16 k2, __m128i a, __m128i b)

For each unsigned BYTE, if (1) != (2) set 1, else set 0, to the corresponding bit of (3).
If k2 bit is 0, the comparison is not done and the corresponding bit of (3) is set to zero. Upper bits of (3) are zero cleared.
VPCMPUB k1{k2}, ymm2, ymm3/m256, 4    (V5+BW+VL
__mmask32 _mm256_cmpneq_epu8_mask(__m256i a, __m256i b)
__mmask32 _mm256_mask_cmpneq_epu8_mask(__mmask32 k2, __m256i a, __m256i b)

For each unsigned BYTE, if (1) != (2) set 1, else set 0, to the corresponding bit of (3).
If k2 bit is 0, the comparison is not done and the corresponding bit of (3) is set to zero. Upper bits of (3) are zero cleared.
VPCMPUB k1{k2}, zmm2, zmm3/m512, 4    (V5+BW
__mmask64 _mm512_cmpneq_epu8_mask(__m512i a, __m512i b)
__mmask64 _mm512_mask_cmpneq_epu8_mask(__mmask64 k2, __m512i a, __m512i b)

For each unsigned BYTE, if (1) != (2) set 1, else set 0, to the corresponding bit of (3).
If k2 bit is 0, the comparison is not done and the corresponding bit of (3) is set to zero. Upper bits of (3) are zero cleared.

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