# VPTESTNMB/VPTESTNMW/VPTESTNMD/VPTESTNMQ — Logical NAND and Set

Opcode/Instruction | Op/En | 64/32 bit Mode Support | CPUID | Description
--- | --- | --- | --- | ---
EVEX.128.F3.0F38.W0 26 /r VPTESTNMB k2 {k1}, xmm2, xmm3/m128 | A | V/V | AVX512VL AVX512BW | Bitwise NAND of packed byte integers in xmm2 and xmm3/m128 and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.256.F3.0F38.W0 26 /r VPTESTNMB k2 {k1}, ymm2, ymm3/m256 | A | V/V | AVX512VL AVX512BW | Bitwise NAND of packed byte integers in ymm2 and ymm3/m256 and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.512.F3.0F38.W0 26 /r VPTESTNMB k2 {k1}, zmm2, zmm3/m512 | A | V/V | AVX512F AVX512BW | Bitwise NAND of packed byte integers in zmm2 and zmm3/m512 and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.128.F3.0F38.W1 26 /r VPTESTNMW k2 {k1}, xmm2, xmm3/m128 | A | V/V | AVX512VL AVX512BW | Bitwise NAND of packed word integers in xmm2 and xmm3/m128 and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.256.F3.0F38.W1 26 /r VPTESTNMW k2 {k1}, ymm2, ymm3/m256 | A | V/V | AVX512VL AVX512BW | Bitwise NAND of packed word integers in ymm2 and ymm3/m256 and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.512.F3.0F38.W1 26 /r VPTESTNMW k2 {k1}, zmm2, zmm3/m512 | A | V/V | AVX512F AVX512BW | Bitwise NAND of packed word integers in zmm2 and zmm3/m512 and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.128.F3.0F38.W0 27 /r VPTESTNMD k2 {k1}, xmm2, xmm3/m128/m32bcst | B | V/V | AVX512VL AVX512F | Bitwise NAND of packed doubleword integers in xmm2 and xmm3/m128/m32bcst and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.256.F3.0F38.W0 27 /r VPTESTNMD k2 {k1}, ymm2, ymm3/m256/m32bcst | B | V/V | AVX512VL AVX512F | Bitwise NAND of packed doubleword integers in ymm2 and ymm3/m256/m32bcst and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.512.F3.0F38.W0 27 /r VPTESTNMD k2 {k1}, zmm2, zmm3/m512/m32bcst | B | V/V | AVX512F | Bitwise NAND of packed doubleword integers in zmm2 and zmm3/m512/m32bcst and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.128.F3.0F38.W1 27 /r VPTESTNMQ k2 {k1}, xmm2, xmm3/m128/m64bcst | B | V/V | AVX512VL AVX512F | Bitwise NAND of packed quadword integers in xmm2 and xmm3/m128/m64bcst and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.256.F3.0F38.W1 27 /r VPTESTNMQ k2 {k1}, ymm2, ymm3/m256/m64bcst | B | V/V | AVX512VL AVX512F | Bitwise NAND of packed quadword integers in ymm2 and ymm3/m256/m64bcst and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.
EVEX.512.F3.0F38.W1 27 /r VPTESTNMQ k2 {k1}, zmm2, zmm3/m512/m64bcst | B | V/V | AVX512F | Bitwise NAND of packed quadword integers in zmm2 and zmm3/m512/m64bcst and set mask k2 to reflect the zero/non-zero status of each element of the result, under writemask k1.

## Instruction Operand Encoding ¶

Op/En | Tuple Type | Operand 1 | Operand 2 | Operand 3 | Operand 4
--- | --- | --- | --- | --- | ---
A | Full Mem | ModRM:reg (w) | EVEX.vvvv (r) | ModRM:r/m (r) | N/A
B | Full | ModRM:reg (w) | EVEX.vvvv (r) | ModRM:r/m (r) | N/A

### Description ¶

Performs a bitwise logical NAND operation on the byte/word/doubleword/quadword element of the first source operand (the second operand) with the corresponding element of the second source operand (the third operand) and stores the logical comparison result into each bit of the destination operand (the first operand) according to the writemask k1. Each bit of the result is set to 1 if the bitwise AND of the corresponding elements of the first and second src operands is zero; otherwise it is set to 0.

EVEX encoded VPTESTNMD/Q: The first source operand is a ZMM/YMM/XMM registers. The second source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location, or a 512/256/128-bit vector broadcasted from a 32/64-bit memory location. The destination is updated according to the writemask.

EVEX encoded VPTESTNMB/W: The first source operand is a ZMM/YMM/XMM registers. The second source operand can be a ZMM/YMM/XMM register, a 512/256/128-bit memory location. The destination is updated according to the writemask.

### Operation ¶

#### VPTESTNMB ¶

    (KL, VL) = (16, 128), (32, 256), (64, 512)
    FOR j := 0 TO KL-1
        i := j*8
        IF MaskBit(j) OR *no writemask*
            THEN
                DEST[j] := (SRC1[i+7:i] BITWISE AND SRC2[i+7:i] == 0)? 1 : 0
            ELSE DEST[j] := 0; zeroing masking only
        FI
    ENDFOR
    DEST[MAX_KL-1:KL] := 0

#### VPTESTNMW ¶

    (KL, VL) = (8, 128), (16, 256), (32, 512)
    FOR j := 0 TO KL-1
        i := j*16
        IF MaskBit(j) OR *no writemask*
            THEN
                DEST[j] := (SRC1[i+15:i] BITWISE AND SRC2[i+15:i] == 0)? 1 : 0
            ELSE DEST[j] := 0; zeroing masking only
        FI
    ENDFOR
    DEST[MAX_KL-1:KL] := 0

#### VPTESTNMD ¶

    (KL, VL) = (4, 128), (8, 256), (16, 512)
    FOR j := 0 TO KL-1
        i := j*32
        IF MaskBit(j) OR *no writemask*
            THEN
                IF (EVEX.b = 1) AND (SRC2 *is memory*)
                    THEN DEST[i+31:i] := (SRC1[i+31:i] BITWISE AND SRC2[31:0] == 0)? 1 : 0
                    ELSE DEST[j] := (SRC1[i+31:i] BITWISE AND SRC2[i+31:i] == 0)? 1 : 0
                FI
            ELSE DEST[j] := 0; zeroing masking only
        FI
    ENDFOR
    DEST[MAX_KL-1:KL] := 0

#### VPTESTNMQ ¶

    (KL, VL) = (2, 128), (4, 256), (8, 512)
    FOR j := 0 TO KL-1
        i := j*64
        IF MaskBit(j) OR *no writemask*
            THEN
                IF (EVEX.b = 1) AND (SRC2 *is memory*)
                    THEN DEST[j] := (SRC1[i+63:i] BITWISE AND SRC2[63:0] == 0)? 1 : 0;
                    ELSE DEST[j] := (SRC1[i+63:i] BITWISE AND SRC2[i+63:i] == 0)? 1 : 0;
                FI;
            ELSE DEST[j] := 0; zeroing masking only
        FI
    ENDFOR
    DEST[MAX_KL-1:KL] := 0

### Intel C/C++ Compiler Intrinsic Equivalent ¶

    VPTESTNMB __mmask64 _mm512_testn_epi8_mask( __m512i a, __m512i b);

    VPTESTNMB __mmask64 _mm512_mask_testn_epi8_mask(__mmask64, __m512i a, __m512i b);

    VPTESTNMB __mmask32 _mm256_testn_epi8_mask(__m256i a, __m256i b);

    VPTESTNMB __mmask32 _mm256_mask_testn_epi8_mask(__mmask32, __m256i a, __m256i b);

    VPTESTNMB __mmask16 _mm_testn_epi8_mask(__m128i a, __m128i b);

    VPTESTNMB __mmask16 _mm_mask_testn_epi8_mask(__mmask16, __m128i a, __m128i b);

    VPTESTNMW __mmask32 _mm512_testn_epi16_mask( __m512i a, __m512i b);

    VPTESTNMW __mmask32 _mm512_mask_testn_epi16_mask(__mmask32, __m512i a, __m512i b);

    VPTESTNMW __mmask16 _mm256_testn_epi16_mask(__m256i a, __m256i b);

    VPTESTNMW __mmask16 _mm256_mask_testn_epi16_mask(__mmask16, __m256i a, __m256i b);

    VPTESTNMW __mmask8 _mm_testn_epi16_mask(__m128i a, __m128i b);

    VPTESTNMW __mmask8 _mm_mask_testn_epi16_mask(__mmask8, __m128i a, __m128i b);

    VPTESTNMD __mmask16 _mm512_testn_epi32_mask( __m512i a, __m512i b);

    VPTESTNMD __mmask16 _mm512_mask_testn_epi32_mask(__mmask16, __m512i a, __m512i b);

    VPTESTNMD __mmask8 _mm256_testn_epi32_mask(__m256i a, __m256i b);

    VPTESTNMD __mmask8 _mm256_mask_testn_epi32_mask(__mmask8, __m256i a, __m256i b);

    VPTESTNMD __mmask8 _mm_testn_epi32_mask(__m128i a, __m128i b);

    VPTESTNMD __mmask8 _mm_mask_testn_epi32_mask(__mmask8, __m128i a, __m128i b);

    VPTESTNMQ __mmask8 _mm512_testn_epi64_mask(__m512i a, __m512i b);

    VPTESTNMQ __mmask8 _mm512_mask_testn_epi64_mask(__mmask8, __m512i a, __m512i b);

    VPTESTNMQ __mmask8 _mm256_testn_epi64_mask(__m256i a, __m256i b);

    VPTESTNMQ __mmask8 _mm256_mask_testn_epi64_mask(__mmask8, __m256i a, __m256i b);

    VPTESTNMQ __mmask8 _mm_testn_epi64_mask(__m128i a, __m128i b);

    VPTESTNMQ __mmask8 _mm_mask_testn_epi64_mask(__mmask8, __m128i a, __m128i b);

### SIMD Floating-Point Exceptions ¶

None.

### Other Exceptions ¶

VPTESTNMD/VPTESTNMQ: See Table 2-49, “Type E4 Class Exception Conditions.”

VPTESTNMB/VPTESTNMW: See Exceptions Type E4.nb in Table 2-49, “Type E4 Class Exception Conditions.”