KXORW/KXORB/KXORQ/KXORD—Bitwise Logical XOR Masks

Opcode/

Op/En

64/32

CPUID

Description

Instruction bit Mode Support Feature Flag
VEX.L1.0F.W0 47 /r KXORW k1, k2, k3 RVR V/V AVX512F Bitwise XOR 16-bit masks k2 and k3 and place result in k1.
VEX.L1.66.0F.W0 47 /r KXORB k1, k2, k3 RVR V/V AVX512DQ Bitwise XOR 8-bit masks k2 and k3 and place result in k1.
VEX.L1.0F.W1 47 /r KXORQ k1, k2, k3 RVR V/V AVX512BW Bitwise XOR 64-bit masks k2 and k3 and place result in k1.
VEX.L1.66.0F.W1 47 /r KXORD k1, k2, k3 RVR V/V AVX512BW Bitwise XOR 32-bit masks k2 and k3 and place result in k1.

Instruction Operand Encoding

Op/En Operand 1 Operand 2 Operand 3
RVR ModRM:reg (w) VEX.1vvv (r) ModRM:r/m (r, ModRM:[7:6] must be 11b)

Description

Performs a bitwise XOR between the vector mask k2 and the vector mask k3, and writes the result into vector mask k1 (three-operand form).

Operation

KXORW

DEST[15:0] := SRC1[15:0] BITWISE XOR SRC2[15:0]
DEST[MAX_KL-1:16] := 0

KXORB

DEST[7:0] := SRC1[7:0] BITWISE XOR SRC2[7:0]
DEST[MAX_KL-1:8] := 0

KXORQ

DEST[63:0] := SRC1[63:0] BITWISE XOR SRC2[63:0]
DEST[MAX_KL-1:64] := 0

KXORD

DEST[31:0] := SRC1[31:0] BITWISE XOR SRC2[31:0]
DEST[MAX_KL-1:32] := 0

Intel C/C++ Compiler Intrinsic Equivalent

KXORW __mmask16 _mm512_kxor(__mmask16 a, __mmask16 b);

Flags Affected

None

SIMD Floating-Point Exceptions

None

Other Exceptions

See Table 2-63, “TYPE K20 Exception Definition (VEX-Encoded OpMask Instructions w/o Memory Arg)”.