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> but include in excruciating detail the description of every single instruction well, at least the official ones with the officially supported operands. Sands
by genewitch 6y ago
> but include in excruciating detail the description of every single instruction
well, at least the official ones with the officially supported operands. Sandsifter has a lot to say about how many undocumented instructions exist on just the "exposed" x86 part of the CPU, nevermind the ARM and other sub ring-0 stuff.
- cesarb 6y agoYes, but in the context of this thread: undocumented instructions can change from generation to generation of a processor architecture, while documented instructions are much more stable; and because of that, compilers will not generate undocumented instructions. When reading compiler output, the official documentation of the instructions (plus documentation of the calling conventions) should be enough.