NASM 2.05 based x86 Instruction Reference[ch211]

A.5.188 MULSS: Scalar Single-FP Multiply MULSS xmm1,xmm2/mem32 ; F3 0F 59 /r [KATMAI,SSE] MULSS multiplies the lowest single-precision FP values of both operands, and stores the result in the low doubleword of xmm1.