Since y is specified in the output operand section, the updated value in %edx is stored in -8(%ebp), the location of y on stack.

因为 y 是在输出操作数部分中指定的，所以 %edx 中更新的值存储在 -8(%ebp)，堆栈上 y 的位置中。

youdao

Section 1.469-4, A has elected to group X and Y.

FORBES: Overview Of The New 3.8% Investment Income Tax, Part 2: Passive Activities