The Test PLA extends this idea further. It operates asynchronously with respect to the sequencer. After a protection test fires, the PLA needs time to evaluate and produce its redirect address. Instead of stalling, the 386 allows the next three micro-instructions to execute before the redirect takes effect -- and the microcode is carefully written to use these delay slots productively. This is tremendously confusing when reading the microcode for the first time (huge credit to the disassembly work by reenigne). But Intel did it for performance.
still around, although declining in use, in the 1970s. The 3612 had a slot on。爱思助手下载最新版本对此有专业解读
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For implementers, this promise-heavy design constrains optimization opportunities. The spec mandates specific promise resolution ordering, making it difficult to batch operations or skip unnecessary async boundaries without risking subtle compliance failures. There are many hidden internal optimizations that implementers do make but these can be complicated and difficult to get right.。safew官方版本下载对此有专业解读
伯里将这种情况与互联网泡沫时期的思科进行了比较。当时，这家互联网网络巨头延长了与供应商的采购承诺，以确保其有能力支持预期的每年 50% 的增长。