VPCMPB - Packed CoMPare Byte (imm8=2)

VPCMPB k1{k2}, xmm2, xmm3/m128, 2    (V5+BW+VL
__mmask16 _mm_cmple_epi8_mask(__m128i a, __m128i b)
__mmask16 _mm_mask_cmple_epi8_mask(__mmask16 k2, __m128i a, __m128i b)

For each signed 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.
VPCMPB k1{k2}, ymm2, ymm3/m256, 2    (V5+BW+VL
__mmask32 _mm256_cmple_epi8_mask(__m256i a, __m256i b)
__mmask32 _mm256_mask_cmple_epi8_mask(__mmask32 k2, __m256i a, __m256i b)

For each signed 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.
VPCMPB k1{k2}, zmm2, zmm3/m512, 2    (V5+BW
__mmask64 _mm512_cmple_epi8_mask(__m512i a, __m512i b)
__mmask64 _mm512_mask_cmple_epi8_mask(__mmask64 k2, __m512i a, __m512i b)

For each signed 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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