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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 />

PANDN<br />

Packed Logical <strong>Bit</strong>wise AND NOT<br />

Performs a bitwise logical AND of the value in the second source operand and the<br />

one’s complement of the value in the first source operand and writes the result in the<br />

destination (first source). The first source/destination operand is an XMM register and<br />

the second source operand is another XMM register or 128-bit memory location.<br />

Mnemonic Opcode Description<br />

PANDN xmm1, xmm2/mem128 66 0F DF /r Performs bitwise logical AND NOT of values in an XMM register<br />

and in another XMM register or 128-bit memory location and<br />

writes the result in the destination XMM register.<br />

xmm1<br />

127 0<br />

xmm2/mem128<br />

127 0<br />

invert<br />

AND<br />

pandn-128.eps<br />

Related Instructions<br />

PAND, POR, PXOR<br />

rFLAGS Affected<br />

None<br />

MXCSR Flags Affected<br />

None<br />

PANDN 229

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