x86 Instruction Set Reference

MOVHLPS

Move Packed Single-Precision Floating-Point Values High to Low

Opcode Mnemonic Description
0F 12 /r MOVHLPS xmm1, xmm2 Move two packed single-precision floating-point values from high quadword of xmm2 to low quadword of xmm1.
Description

Moves two packed single-precision floating-point values from the high quadword of the source operand (second operand) to the low quadword of the destination operand (first operand). The high quadword of the destination operand is left unchanged.
Operation 
Destination[0..63] = Source[64..127];
//Destination[64..127] unchanged
SIMD Floating-Point Exceptions
None.
Protected Mode Exceptions
#NMIf TS in CR0 is set.
#NMIf TS in CR0 is set.
Real-Address Mode Exceptions
Same exceptions as in Protected Mode.
Virtual-8086 Mode Exceptions
Same exceptions as in Protected Mode.
Instruction Latency Throughput Execution Unit
CPUID0F3n/0F2n0F3n/0F2n0F2n
MOVHLPS xmm, xmm6/62/2MMX_SHFT