MOVDDUP—Replicate Double FP ValuesInstruction Operand EncodingDescriptionFor 256-bit or higher versions: Duplicates even-indexed double-precision floating-point values from the source operand (the second operand) and into adjacent pair and store to the destination operand (the first operand).For 128-bit versions: Duplicates the low double-precision floating-point value from the source operand (the second operand) and store to the destination operand (the first operand).128-bit Legacy SSE version: Bits (MAXVL-1:128) of the corresponding destination register are unchanged. The source operand is XMM register or a 64-bit memory location.VEX.128 and EVEX.128 encoded version: Bits (MAXVL-1:128) of the destination register are zeroed. The source operand is XMM register or a 64-bit memory location. The destination is updated conditionally under the writemask for EVEX version.VEX.256 and EVEX.256 encoded version: Bits (MAXVL-1:256) of the destination register are zeroed. The source operand is YMM register or a 256-bit memory location. The destination is updated conditionally under the writemask for EVEX version.EVEX.512 encoded version: The destination is updated according to the writemask. The source operand is ZMM register or a 512-bit memory location.Note: VEX.vvvv and EVEX.vvvv are reserved and must be 1111b otherwise instructions will #UD.Opcode/InstructionOp / En64/32 bit Mode SupportCPUID Feature FlagDescriptionF2 0F 12 /rMOVDDUP xmm1, xmm2/m64AV/VSSE3Move double-precision floating-point value from xmm2/m64 and duplicate into xmm1.VEX.128.F2.0F.WIG 12 /rVMOVDDUP xmm1, xmm2/m64AV/VAVXMove double-precision floating-point value from xmm2/m64 and duplicate into xmm1.VEX.256.F2.0F.WIG 12 /rVMOVDDUP ymm1, ymm2/m256AV/VAVXMove even index double-precision floating-point values from ymm2/mem and duplicate each element into ymm1.EVEX.128.F2.0F.W1 12 /rVMOVDDUP xmm1 {k1}{z}, xmm2/m64BV/VAVX512VLAVX512FMove double-precision floating-point value from xmm2/m64 and duplicate each element into xmm1 subject to writemask k1.EVEX.256.F2.0F.W1 12 /rVMOVDDUP ymm1 {k1}{z}, ymm2/m256BV/VAVX512VLAVX512FMove even index double-precision floating-point values from ymm2/m256 and duplicate each element into ymm1 subject to writemask k1.EVEX.512.F2.0F.W1 12 /rVMOVDDUP zmm1 {k1}{z}, zmm2/m512BV/VAVX512FMove even index double-precision floating-point values from zmm2/m512 and duplicate each element into zmm1 subject to writemask k1.Op/EnTuple TypeOperand 1Operand 2Operand 3Operand 4ANAModRM:reg (w)ModRM:r/m (r)NANABMOVDDUPModRM:reg (w)ModRM:r/m (r)NANA
This UNOFFICIAL reference was generated from the official Intel® 64 and IA-32 Architectures Software Developer’s Manual by a dumb script. There is no guarantee that some parts aren't mangled or broken and is distributed WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.