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Opcode/Instruction RM UNPCKLPD xmm1, xmm2/m128 |
Op /En |
64/32 bit Mode Support V/V |
CPUID Feature Flag SSE2 |
Description Unpacks and Interleaves double-precision floating-point values from low quadwords of xmm1 and xmm2/m128. |
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VEX.NDS.128.66.0F.WIG 14 /r VUNPCKLPD xmm1,xmm2, xmm3/m128 |
RVM | V/V | AVX | Unpacks and Interleaves double-precision floating-point values from low quadwords of xmm2 and xmm3/m128. |
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VEX.NDS.256.66.0F.WIG 14 /r VUNPCKLPD ymm1,ymm2, ymm3/m256 |
RVM | V/V | AVX | Unpacks and Interleaves double-precision floating-point values from low quadwords of ymm2 and ymm3/m256. |
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EVEX.NDS.128.66.0F.W1 14 /r VUNPCKLPD xmm1 {k1}{z}, xmm2, xmm3/m128/m64bcst |
FV | V/V | AVX512VL AVX512F | Unpacks and Interleaves double precision floating-point values from low quadwords of xmm2 and xmm3/m128/m64bcst subject to write mask k1. |
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EVEX.NDS.256.66.0F.W1 14 /r VUNPCKLPD ymm1 {k1}{z}, ymm2, ymm3/m256/m64bcst |
FV | V/V | AVX512VL AVX512F | Unpacks and Interleaves double precision floating-point values from low quadwords of ymm2 and ymm3/m256/m64bcst subject to write mask k1. |
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EVEX.NDS.512.66.0F.W1 14 /r VUNPCKLPD zmm1 {k1}{z}, zmm2, zmm3/m512/m64bcst |
FV | V/V | AVX512F | Unpacks and Interleaves double-precision floating-point values from low quadwords of zmm2 and zmm3/m512/m64bcst subject to write mask k1. |
| Op/En | Operand 1 | Operand 2 | Operand 3 | Operand 4 |
| RM | ModRM:reg (r, w) | ModRM:r/m (r) | NA | NA |
| RVM | ModRM:reg (w) | VEX.vvvv (r) | ModRM:r/m (r) | NA |
| FV | ModRM:reg (w) | EVEX.vvvv (r) | ModRM:r/m (r) | NA |
Description
Performs an interleaved unpack of the low double-precision floating-point values from the first source operand and the second source operand.
128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The desti-nation is not distinct from the first source XMM register and the upper bits (MAX_VL-1:128) of the corresponding ZMM register destination are unmodified. When unpacking from a memory operand, an implementation may fetch only the appropriate 64 bits; however, alignment to 16-byte boundary and normal segment checking will still be enforced.
VEX.128 encoded version: The first source operand is a XMM register. The second source operand can be a XMM register or a 128-bit memory location. The destination operand is a XMM register. The upper bits (MAX_VL-1:128) of the corresponding ZMM register destination are zeroed.
VEX.256 encoded version: The first source operand is a YMM register. The second source operand can be a YMM register or a 256-bit memory location. The destination operand is a YMM register.
EVEX.512 encoded version: The first source operand is a ZMM register. The second source operand is a ZMM register, a 512-bit memory location, or a 512-bit vector broadcasted from a 64-bit memory location. The destina-tion operand is a ZMM register, conditionally updated using writemask k1.
EVEX.256 encoded version: The first source operand is a YMM register. The second source operand is a YMM register, a 256-bit memory location, or a 256-bit vector broadcasted from a 64-bit memory location. The destina-tion operand is a YMM register, conditionally updated using writemask k1.
EVEX.128 encoded version: The first source operand is an XMM register. The second source operand is a XMM register, a 128-bit memory location, or a 128-bit vector broadcasted from a 64-bit memory location. The destina-tion operand is a XMM register, conditionally updated using writemask k1.
Operation
VUNPCKLPD (EVEX encoded versions when SRC2 is a register)
(KL, VL) = (2, 128), (4, 256), (8, 512)
IF VL >= 128
TMP_DEST[63:0] (cid:197) SRC1[63:0]
TMP_DEST[127:64] (cid:197) SRC2[63:0]
FI;
IF VL >= 256
TMP_DEST[191:128] (cid:197) SRC1[191:128]
TMP_DEST[255:192] (cid:197) SRC2[191:128]
FI;
IF VL >= 512
TMP_DEST[319:256] (cid:197) SRC1[319:256]
TMP_DEST[383:320] (cid:197) SRC2[319:256]
TMP_DEST[447:384] (cid:197) SRC1[447:384]
TMP_DEST[511:448] (cid:197) SRC2[447:384]
FI;
FOR j (cid:197) 0 TO KL-1
i (cid:197) j * 64
IF k1[j] OR *no writemask*
THEN DEST[i+63:i] (cid:197) TMP_DEST[i+63:i]
ELSE
IF *merging-masking*
; merging-masking
THEN *DEST[i+63:i] remains unchanged*
ELSE *zeroing-masking*
; zeroing-masking
DEST[i+63:i] (cid:197) 0
FI
FI;
ENDFOR
DEST[MAX_VL-1:VL] (cid:197) 0
VUNPCKLPD (EVEX encoded version when SRC2 is memory)
(KL, VL) = (2, 128), (4, 256), (8, 512)
FOR j (cid:197) 0 TO KL-1
i (cid:197) j * 64
IF (EVEX.b = 1)
THEN TMP_SRC2[i+63:i] (cid:197) SRC2[63:0]
ELSE TMP_SRC2[i+63:i] (cid:197) SRC2[i+63:i]
FI;
ENDFOR;
IF VL >= 128
TMP_DEST[63:0] (cid:197) SRC1[63:0]
TMP_DEST[127:64] (cid:197) TMP_SRC2[63:0]
FI;
IF VL >= 256
TMP_DEST[191:128] (cid:197) SRC1[191:128]
TMP_DEST[255:192] (cid:197) TMP_SRC2[191:128]
FI;
IF VL >= 512
TMP_DEST[319:256] (cid:197) SRC1[319:256]
TMP_DEST[383:320] (cid:197) TMP_SRC2[319:256]
TMP_DEST[447:384] (cid:197) SRC1[447:384]
TMP_DEST[511:448] (cid:197) TMP_SRC2[447:384]
FI;
FOR j (cid:197) 0 TO KL-1
i (cid:197) j * 64
IF k1[j] OR *no writemask*
THEN DEST[i+63:i] (cid:197) TMP_DEST[i+63:i]
ELSE
IF *merging-masking*
; merging-masking
THEN *DEST[i+63:i] remains unchanged*
ELSE *zeroing-masking*
; zeroing-masking
DEST[i+63:i] (cid:197) 0
FI
FI;
ENDFOR
DEST[MAX_VL-1:VL] (cid:197) 0
VUNPCKLPD (VEX.256 encoded version)
DEST[63:0] (cid:197)SRC1[63:0]
DEST[127:64] (cid:197)SRC2[63:0]
DEST[191:128] (cid:197)SRC1[191:128]
DEST[255:192] (cid:197)SRC2[191:128]
DEST[MAX_VL-1:256] (cid:197) 0
VUNPCKLPD (VEX.128 encoded version)
DEST[63:0] (cid:197)SRC1[63:0]
DEST[127:64] (cid:197)SRC2[63:0]
DEST[MAX_VL-1:128] (cid:197)0
UNPCKLPD (128-bit Legacy SSE version)
DEST[63:0] (cid:197)SRC1[63:0]
DEST[127:64] (cid:197)SRC2[63:0]
DEST[MAX_VL-1:128] (Unmodified)
Intel C/C++ Compiler Intrinsic Equivalent
VUNPCKLPD __m512d _mm512_unpacklo_pd( __m512d a, __m512d b);
VUNPCKLPD __m512d _mm512_mask_unpacklo_pd(__m512d s, __mmask8 k, __m512d a, __m512d b);
VUNPCKLPD __m512d _mm512_maskz_unpacklo_pd(__mmask8 k, __m512d a, __m512d b);
VUNPCKLPD __m256d _mm256_unpacklo_pd(__m256d a, __m256d b)
VUNPCKLPD __m256d _mm256_mask_unpacklo_pd(__m256d s, __mmask8 k, __m256d a, __m256d b);
VUNPCKLPD __m256d _mm256_maskz_unpacklo_pd(__mmask8 k, __m256d a, __m256d b);
UNPCKLPD __m128d _mm_unpacklo_pd(__m128d a, __m128d b)
VUNPCKLPD __m128d _mm_mask_unpacklo_pd(__m128d s, __mmask8 k, __m128d a, __m128d b);
VUNPCKLPD __m128d _mm_maskz_unpacklo_pd(__mmask8 k, __m128d a, __m128d b);
SIMD Floating-Point Exceptions
None
Other Exceptions
Non-EVEX-encoded instructions, see Exceptions Type 4.
EVEX-encoded instructions, see Exceptions Type E4NF.