The tradeoff is complexity. The microcode must be carefully arranged so that the instructions in delay slots are either useful setup for both paths, or at least harmless if the redirect fires. Not every case is as clean as RETF. When a PLA redirect interrupts an LCALL, the return address is already pushed onto the microcode call stack (yes, the 386 has a microcode call stack) -- the redirected code must account for this stale entry. When multiple protection tests overlap, or when a redirect fires during a delay slot of another jump, the control flow becomes hard to reason about. During the FPGA core implementation, protection delay slot interactions were consistently the most difficult bugs to track down.
河北游客田林在四川绵阳市感受到浓浓年味。绵阳市副市长胡进耀介绍，绵阳推出“文旅+微短剧”“文旅+综艺”融合业态模式，带动相关景点客流量增长20％。
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2024年12月24日 星期二 新京报
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