Three microcode cycles for the writeback alone. That's acceptable because segment loads are already expensive multi-cycle operations, and the designers likely expected them to be infrequent -- most programs load their segments once at startup and never touch them again. Page translations happen on every memory access, so the same approach would be ruinous. Hence the fully autonomous hardware walker.
习近平总书记的回答温暖人心：“我忙就是忙这些事，‘国之大者’就是人民的幸福生活。”
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// Synchronous source from in-memory data