NASM 2.05 based x86 Instruction Reference[ch055]
A.5.35 CVTDQ2PD: Packed Signed INT32 to Packed Double-Precision FP Conversion CVTDQ2PD xmm1,xmm2/mem64 ; F3 0F E6 /r [WILLAMETTE,SSE2] CVTDQ2PD converts two packed signed doublewords from the source operand to two packed double-precision FP values in the destination operand. The destination operand is an XMM register. The source can be either an XMM register or a 64-bit memory location. If the source is a register, the packed integers are in the low quadword.