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AMD 64-Bit Technology - ECE User Home Pages

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26568—Rev. 3.02—August 2002<br />

<strong>AMD</strong> <strong>64</strong>-<strong>Bit</strong> <strong>Technology</strong><br />

MOVDQA<br />

Move Aligned Double Quadword<br />

Moves an aligned 128-bit (double quadword) value:<br />

„ from an XMM register or 128-bit memory location to another XMM register, or<br />

„ from an XMM register to a 128-bit memory location or another XMM register.<br />

Mnemonic Opcode Description<br />

MOVDQA xmm1, xmm2/mem128 66 0F 6F /r Moves 128-bit value from an XMM register or 128-bit memory<br />

location to the destination XMM register.<br />

MOVDQA xmm1/mem128, xmm2 66 0F 7F /r Moves 128-bit value from an XMM register to the destination<br />

XMM register or 128-bit memory location.<br />

xmm1<br />

127 0<br />

xmm2/mem128<br />

127 0<br />

copy<br />

xmm1/mem128<br />

127 0<br />

xmm2<br />

127 0<br />

copy<br />

movdqa.eps<br />

A memory operand that is not aligned on a 16-byte boundary causes a generalprotection<br />

exception.<br />

Related Instructions<br />

MOVD, MOVDQU, MOVDQ2Q, MOVQ, MOVQ2DQ<br />

rFLAGS Affected<br />

None<br />

MOVDQA 149

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