The 386 microcode sequencer has a one-cycle pipeline delay: when a jump or RNI (run next instruction) is decoded, the micro-instruction immediately after it has already been fetched and will execute before the jump takes effect. This "delay slot" is a basic property of the sequencer, and the microcode is written to fill it with useful work rather than waste a cycle on a bubble. The examples in the PTSAV section above show this: at 582/5AE, the micro-instruction after LCALL executes before the subroutine begins.
2026-02-27 00:00:00:0王欣悦3014245310http://paper.people.com.cn/rmrb/pc/content/202602/27/content_30142453.htmlhttp://paper.people.com.cn/rmrb/pad/content/202602/27/content_30142453.html11921 多措并举,从“一时火”到“一直火”(有所思)
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