KORW/KORB/KORQ/KORD — Bitwise Logical OR Masks

Opcode/Instruction Op/En 64/32 bit Mode Support CPUID Feature Flag Description
VEX.L1.0F.W0 45 /r KORW k1, k2, k3 RVR V/V AVX512F Bitwise OR 16 bits masks k2 and k3 and place result in k1.
VEX.L1.66.0F.W0 45 /r KORB k1, k2, k3 RVR V/V AVX512DQ Bitwise OR 8 bits masks k2 and k3 and place result in k1.
VEX.L1.0F.W1 45 /r KORQ k1, k2, k3 RVR V/V AVX512BW Bitwise OR 64 bits masks k2 and k3 and place result in k1.
VEX.L1.66.0F.W1 45 /r KORD k1, k2, k3 RVR V/V AVX512BW Bitwise OR 32 bits 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 OR between the vector mask k2 and the vector mask k3, and writes the result into vector mask k1 (three-operand form).

Operation

KORW

DEST[15:0]←SRC1[15:0] BITWISE OR SRC2[15:0]
DEST[MAX_KL-1:16] ← 0

KORB

DEST[7:0]←SRC1[7:0] BITWISE OR SRC2[7:0]
DEST[MAX_KL-1:8] ← 0

KORQ

DEST[63:0]←SRC1[63:0] BITWISE OR SRC2[63:0]
DEST[MAX_KL-1:64] ← 0

KORD

DEST[31:0]←SRC1[31:0] BITWISE OR SRC2[31:0]
DEST[MAX_KL-1:32] ← 0

Intel C/C++ Compiler Intrinsic Equivalent

KORW __mmask16 _mm512_kor(__mmask16 a, __mmask16 b);

Flags Affected

None

SIMD Floating-Point Exceptions

None

Other Exceptions

See Exceptions Type K20.