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chinhodado 2014-12-27 12:17:38 -08:00
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Citra current has 2 CPU cores: `armemu` and `dyncom/skyeye`.
`armemu` is an old interpreter. It originally supports ARM7 (ARMv5) and partial ARMv6 support only. We added in ARMv6 stuffs and other fixes ourselves to get 3ds emulation as far as it is. ([ichfly](https://github.com/ichfly) tacked on more ARMv6 instructions for 3dmoo and [Lioncash](https://github.com/lioncash) is now doing further work on that area)
`SkyEye` is "[a very fast full system simulator which takes llvm as IR of dynmic compiled framework.. It can simulate series ARM, Coldfire,Mips, Powerpc, Sparc, x86 and Blackfin DSP Processor](http://sourceforge.net/projects/skyeye/)". It probably is still in active development, though really slow.
`dyncom` is the fallback interpreter to SkyEye's ARM dynamic recompiler. `dyncom` is more complex, cleaner, a little buggier than the current version of `armemu`, but it runs much faster. `dyncom` doesn't have as many instructions implemented as `armemu`.
`armemu` is currently used by default, but eventually we will ditch it and use `dyncom` instead. Our plan is to bring `dyncom` up to the level of `armemu`, then get rid of `armemu`. There's no sense in maintaining two interpreters.