# UNPCKLPS
# Unpack and Interleave Low Packed Single-Precision Floating-Point Values
| Opcode | Mnemonic | Description |
|---|---|---|
| 0F 14 /r | UNPCKLPS xmm1, xmm2/m128 | Unpack and interleaves the single-precision floating-point values from low quadwords of xmm1 and xmm2/mem into xmm1. |
# Description
Performs an interleaved unpack of the low-order single-precision floating-point values from the source operand (second operand) and the destination operand (first operand). The source operand can be an XMM register or a 128-bit memory location; the destination operand is an XMM register.
When unpacking from a memory operand, an implementation may fetch only the appropriate 64 bits; however, alignment to 16-byte boundary and normal segment checking will still be enforced.
# Operation
Destination[0..31] = Destination[0..31];
Destination[32..63] = Source[0..31];
Destination[64..95] = Destination[32..63];
Destination[96..127] = Source[32..63];
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| Instruction | Latency | Throughput | Execution Unit |
|---|---|---|---|
| CPUID | 0F3n/0F2n/069n | 0F3n/0F2n/069n | 0F2n |
| UNPCKLPS xmm, xmm | 4/4/3 | 2/2/2 | MMX_SHFT |