4 ms·
Has someone tried to write own microcode and load it? Sounds like it should be much faster to run your own code this way than having the official microcode run
by goombacloud 4y ago
Has someone tried to write own microcode and load it? Sounds like it should be much faster to run your own code this way than having the official microcode run an interpreter for your x86 instructions.
- fulafel 4y agoIt's signed, no interesting headway has been published afaik relating to recent intel processors. edit: there was this piece interesting headway mentioned elsewhere in comments: https://news.ycombinator.com/item?id=32149210 https://news.ycombinator.com/item?id=32149210
- viraptor 4y agoThere was some research into modifying old AMD microcode when they didn't enforce signing. https://hackaday.com/2017/12/28/34c3-hacking-into-a-cpus-microcode/ https://hackaday.com/2017/12/28/34c3-hacking-into-a-cpus-mic... Nothing of that level on Intel so far.
- codedokode 4y agoI guess that the amount of SRAM for microcode is limited so you cannot write a lot of code this way. Also, microcode might be used only for slow, rarely used instructions, and it doesn't make much sense to optimize them.