NASM 2.05 based x86 Instruction Reference[ch083]
A.5.63 DIVSS: Scalar Single-Precision FP Divide DIVSS xmm1,xmm2/mem32 ; F3 0F 5E /r [KATMAI,SSE] DIVSS divides the low-order single-precision FP value in the destination operand by the low-order single-precision FP value in the source operand, and stores the single-precision result in the destination register. The destination is an XMM register. The source operand can be either an XMM register or a 32-bit memory location. dst[0-31] := dst[0-31] / src[0-31], dst[32-127] remains unchanged.