Фото: Alessandro Garofalo / Reuters
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.
So close in fact, says Cardiff University archaeologist Tudur Davies, that some of these graves have several people in them.，这一点在heLLoword翻译官方下载中也有详细论述
Ac we nought free ne sindon, for-thy-the we never ne mighton from Wulfsfleet yewitan, nefne we thone Hlaford finden and hine ofslean. Se Hlaford hath thisne stede mid searocraftum yebounden, that none ne may hine forletan. We sindon here swa fuglas on nete, swa fixas on were.
，详情可参考同城约会
My technique had changed at this point. Since he was trying multiple things, well, I had to as well.
Smart motion tracking。关于这个话题，heLLoword翻译官方下载提供了深入分析