Tickly wrote:
The PowerPC has 32 64bit integr registers, which can be used as 8, 16, 32 or 64bit depending on what you specify with the instruction. They are named R0 to R31.
It also has 32 floating point registers. I can't remember if these are internally 64 or 80bits wide, you'll have to look that up.
AFAIK, the integer register set are only 32-bits wide on 60x, 64-bit on G3 and above. Still, not sure, so don't take my word for it.
The FPU regs are 64-bit IEEE754 compatible, but I think the internal calculation goes higher.
