AMD x86-64 Architecture Programmer's Manual, Volume 4, 128-Bit ...

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AMD64 Technology 26568—Rev. 3.05—September 2003 MOVSD Move Scalar Double-Precision Floating-Point Moves a scalar double-precision floating-point value: � from the low-order 64 bits of an XMM register or a 64-bit memory location to the low-order 64 bits of another XMM register, or � from the low-order 64 bits of an XMM register to the low-order 64 bits of another XMM register or a 64-bit memory location. If the source operand is an XMM register, the high-order 64 bits of the destination XMM register are not modified. If the source operand is a memory location, the highorder 64 bits of the destination XMM register are cleared to all 0s. Mnemonic Opcode Description MOVSD xmm1, xmm2/mem64 F2 0F 10 /r Moves double-precision floating-point value from an XMM register or 64-bit memory location to an XMM register. MOVSD xmm1/mem64, xmm2 F2 0F 11 /r Moves double-precision floating-point value from an XMM register to an XMM register or 64-bit memory location. 180 MOVSD
26568—Rev. 3.05—September 2003 AMD64 Technology This MOVSD instruction should not be confused with the same-mnemonic MOVSD (move string doubleword) instruction in the general-purpose instruction set. Assemblers can distinguish the instructions by the number and type of operands. Related Instructions MOVAPD, MOVHPD, MOVLPD, MOVMSKPD, MOVUPD rFLAGS Affected None. MXCSR Flags Affected None. xmm1 xmm2 127 64 63 0 127 0 xmm1 64 63 0 mem64 63 0 127 64 63 0 xmm2 copy mem64 63 0 copy 127 64 63 0 copy movsd.eps MOVSD 181
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