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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 />

UNPCKLPS<br />

Unpack Low Single-Precision Floating-Point<br />

Unpacks the low-order single-precision floating-point values in the first and second<br />

source operands and packs them into interleaved doublewords in the destination (first<br />

source). The high-order quadwords of the source operands are ignored. The first<br />

source/destination operand is an XMM register. The second source operand is another<br />

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

Mnemonic Opcode Description<br />

UNPCKLPS xmm1, xmm2/mem128 0F 14 /r Unpacks low-order single-precision floating-point values in an<br />

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

location and packs them into the destination XMM register.<br />

xmm1<br />

xmm2/mem128<br />

127 <strong>64</strong> 63 32 31<br />

0<br />

127 <strong>64</strong> 63 32 31<br />

0<br />

copy<br />

copy<br />

copy<br />

copy<br />

127 96 95 <strong>64</strong> 63 32 31<br />

0<br />

unpcklps.eps<br />

Related Instructions<br />

UNPCKHPD, UNPCKHPS, UNPCKLPD<br />

rFLAGS Affected<br />

None<br />

MXCSR Flags Affected<br />

None<br />

UNPCKLPS 393

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