모두의 코드
KUNPCKBW, KUNPCKWD, KUNPCKDQs (Intel x86/64 assembly instruction)
KUNPCKBW, KUNPCKWD, KUNPCKDQ
Unpack for Mask Registers
참고 사항
아래 표를 해석하는 방법은 x86-64 명령어 레퍼런스 읽는 법 글을 참조하시기 바랍니다.
Opcode/ | Op/En | 64/32 | CPUID | Description |
|---|---|---|---|---|
| RVR | V/V | AVX512F | Unpack and interleave 8 bits masks in k2 and k3 and write word result in k1. |
| RVR | V/V | AVX512BW | Unpack and interleave 16 bits in k2 and k3 and write double-word result in k1. |
| RVR | V/V | AVX512BW | Unpack and interleave 32 bits masks in k2 and k3 and write quadword 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
Unpacks the lower 8/16/32 bits of the second and third operands (source operands) into the low part of the first operand (destination operand), starting from the low bytes. The result is zero-extended in the destination.
Operation
KUNPCKBW
DEST[7:0] <- SRC2[7:0] DEST[15:8] <- SRC1[7:0] DEST[MAX_KL-1:16] <- 0
KUNPCKWD
DEST[15:0] <- SRC2[15:0] DEST[31:16] <- SRC1[15:0]DEST[MAX_KL-1:32] <- 0
KUNPCKDQ
DEST[31:0] <- SRC2[31:0] DEST[63:32] <- SRC1[31:0]DEST[MAX_KL-1:64] <- 0
Intel C/C++ Compiler Intrinsic Equivalent
KUNPCKBW __mmask16 _mm512_kunpackb(__mmask16 a, __mmask16 b); KUNPCKDQ __mmask64 _mm512_kunpackd(__mmask64 a, __mmask64 b); KUNPCKWD __mmask32 _mm512_kunpackw(__mmask32 a, __mmask32 b);
Flags Affected
None
SIMD Floating-Point Exceptions
None
Other Exceptions
See Exceptions Type K20.
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