UNPCKLPD

Unpack and Interleave Low Packed Double Precision Floating-Point Values

stableVMJITAOTinstruction

Encodings

Opcode	Instruction	Op/En	64-bit	Compat/Legacy	Description
`66 0F 14 /r`	`UNPCKLPD xmm1, xmm2/m128`	A	Valid	Valid	Unpacks and Interleaves double precision floating-point values from low quadwords of xmm1 and xmm2/m128.
`VEX.128.66.0F.WIG 14 /r`	`VUNPCKLPD xmm1,xmm2, xmm3/m128`	B	Valid	Valid	Unpacks and Interleaves double precision floating-point values from low quadwords of xmm2 and xmm3/m128.
`VEX.256.66.0F.WIG 14 /r`	`VUNPCKLPD ymm1,ymm2, ymm3/m256`	B	Valid	Valid	Unpacks and Interleaves double precision floating-point values from low quadwords of ymm2 and ymm3/m256.
`EVEX.128.66.0F.W1 14 /r`	`VUNPCKLPD xmm1 {k1}{z}, xmm2, xmm3/m128/m64bcst`	C	Valid	Valid	Unpacks and Interleaves double precision floating-point AVX512F) OR values from low quadwords of xmm2 and AVX10.1 xmm3/m128/m64bcst subject to write mask k1.
`EVEX.256.66.0F.W1 14 /r`	`VUNPCKLPD ymm1 {k1}{z}, ymm2, ymm3/m256/m64bcst`	C	Valid	Valid	Unpacks and Interleaves double precision floating-point AVX512F) OR values from low quadwords of ymm2 and AVX10.1 ymm3/m256/m64bcst subject to write mask k1.
`EVEX.512.66.0F.W1 14 /r`	`VUNPCKLPD zmm1 {k1}{z}, zmm2, zmm3/m512/m64bcst`	C	Valid	Valid	Unpacks and Interleaves double precision floating-point OR AVX10.1 values from low quadwords of zmm2 and zmm3/m512/m64bcst subject to write mask k1.

Operand encoding

Each mode is a value of the Op/En column above. It says which field of the encoded instruction carries each operand, in the order they are written, and whether the instruction reads it, writes it or both.

A

modrm.reg lectura y escrituraModRM byte, reg field (bits 5-3)
modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

B

modrm.reg escrituraModRM byte, reg field (bits 5-3)
vex.vvvv lecturaVEX prefix, vvvv field (inverted)
modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

C

modrm.reg escrituraModRM byte, reg field (bits 5-3)
evex.vvvv lecturaEVEX prefix, vvvv field (inverted)
modrm.rm lecturaModRM byte, r/m field (bits 2-0); with the SIB byte and the displacement when the mod field asks for them

Tupla: Full

Measured cost

Loading measurements from arch-data...

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 destination is not distinct from the first source XMM register and the upper bits (MAXVL-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 (MAXVL-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 destination 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 destination 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 destination 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] := SRC1[63:0]
    TMP_DEST[127:64] := SRC2[63:0]
FI;
IF VL >= 256
    TMP_DEST[191:128] := SRC1[191:128]
    TMP_DEST[255:192] := SRC2[191:128]
FI;
IF VL >= 512
    TMP_DEST[319:256] := SRC1[319:256]
    TMP_DEST[383:320] := SRC2[319:256]
    TMP_DEST[447:384] := SRC1[447:384]
    TMP_DEST[511:448] := SRC2[447:384]
FI;

FOR j := 0 TO KL-1

i := j * 64

IF k1[j] OR *no writemask*

     THEN DEST[i+63:i] := 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] := 0

             FI

FI;

ENDFOR

DEST[MAXVL-1:VL] := 0


VUNPCKLPD (EVEX Encoded Version When SRC2 is Memory)

(KL, VL) = (2, 128), (4, 256), (8, 512)

FOR j := 0 TO KL-1

     i := j * 64

     IF (EVEX.b = 1)

          THEN TMP_SRC2[i+63:i] := SRC2[63:0]

          ELSE TMP_SRC2[i+63:i] := SRC2[i+63:i]

     FI;

ENDFOR;

IF VL >= 128

     TMP_DEST[63:0] := SRC1[63:0]

     TMP_DEST[127:64] := TMP_SRC2[63:0]

FI;

IF VL >= 256

     TMP_DEST[191:128] := SRC1[191:128]

     TMP_DEST[255:192] := TMP_SRC2[191:128]

FI;

IF VL >= 512

     TMP_DEST[319:256] := SRC1[319:256]

     TMP_DEST[383:320] := TMP_SRC2[319:256]

     TMP_DEST[447:384] := SRC1[447:384]

     TMP_DEST[511:448] := TMP_SRC2[447:384]

FI;

FOR j := 0 TO KL-1

     i := j * 64

     IF k1[j] OR *no writemask*

          THEN DEST[i+63:i] := 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] := 0

                  FI

     FI;

ENDFOR

DEST[MAXVL-1:VL] := 0

VUNPCKLPD (VEX.256 Encoded Version)
DEST[63:0] := SRC1[63:0]
DEST[127:64] := SRC2[63:0]
DEST[191:128] := SRC1[191:128]
DEST[255:192] := SRC2[191:128]
DEST[MAXVL-1:256] := 0

VUNPCKLPD (VEX.128 Encoded Version)
DEST[63:0] := SRC1[63:0]
DEST[127:64] := SRC2[63:0]
DEST[MAXVL-1:128] := 0

UNPCKLPD (128-bit Legacy SSE Version)
DEST[63:0] := SRC1[63:0]
DEST[127:64] := SRC2[63:0]
DEST[MAXVL-1:128] (Unmodified)

Intel C/C++ compiler intrinsics

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 Table 2-21, "Type 4 Class Exception Conditions."

EVEX-encoded instructions, see Table 2-52, "Type E4NF Class Exception Conditions."

UNPCKLPD

Encodings

Operand encoding

A

B

C

Measured cost

Description#

Operation#

Intel C/C++ compiler intrinsics#

SIMD Floating-Point Exceptions#

Other Exceptions#

Sources

Description

Operation

Intel C/C++ compiler intrinsics

SIMD Floating-Point Exceptions

Other Exceptions