> the SIMD instructions into Altivec instructions. > since Dolphin already does that it may be just as simple as adapting If my suspicion is correct we wouldn't gain much from looking at this part of Dolphin's source code.
#GAMECUBE EMULATOR MAC 2015 CODE#
I didn't have a look at it but I suspect that there's a JIT in place that translates scalar PPC code directly into (scalar) x86 code and Gekko SIMD code directly into SSE code. > Looking at Dolphin's source would be a good start. That means the SIMD instructions would have to be emulated by translating them into AltiVec code (or scalar code which would be even slower of course).ītw, if anybody has a reliable source (IBM, Nintendo or game developers) showing Gekko's SIMD as being a subset of AltiVec/VMX I'd be glad to be corrected :-) But I don't think the G4's AltiVec unit is able to directly execute Gekko's SIMD instructions as that would mean Gekko's SIMD is a subset of AltiVec, which I strongly doubt. > maybe the G4's altivec could pick up some of the work. So you had a look at Gekko's SIMD instructions? > The SIMD instructions would not be but so hard all but the SIMD ones) should be directly executable by a physical G4.
> Both run in Big Endian, so much of the code may be ableĪctually, all scalar instructions (i.e. Basic/low level mapping shoule be close, if not the same
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