The 386 solves this by repurposing RPT (Repeat). Normally, RPT implements loops -- it re-executes a micro-instruction while decrementing a counter, as we saw in the multiplication post. But when a protection test is in flight, the hardware suppresses RPT's counter-decrement and turns it into a pure stall: the sequencer freezes until the PLA result arrives.
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Source: Computational Materials Science, Volume 267。快连下载安装对此有专业解读
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// 入栈后栈仍保持单调递增（因为小的都被弹走了）
int8 与 int4 — 有什么区别？，更多细节参见51吃瓜