了解Sparc Assembly中的一小段代码片段

Question

从this SPARC code开始，我希望有人确认我对可能进入SPARC程序集的set指令感到困惑：

 main:
        /* I := J */
        ! Store address of J into local register %l7
        set     J, %l7
        ! Load value located by adress %l7 (address of J)  into %l0 register
        ! So put J value into %l0 register
        ld      [%l7], %l0
        ! Store address of I into local register %l7
        set     I, %l7
        ! Store value of %l0 (value of J) at adress of I
        st      %l0, [%l7]
        ! Finally, J value has overwritten the value of I

最后，我们可以说J值已经覆盖了I的值。它是否正确？

很抱歉这个简单的问题，但我对mov，set和st说明感到困惑。感谢