A large variety of processors are supported. Among them the most important are :
Motorola: PowerPC (PPC 601, 603, 604), PowerPC G3 (PPC 75x), PowerPC G4 (PPC 7400,7410,74xx) with Altivec Support, PowerPC IBM 405,440.
Intel: x86(IA-32) Architecture (and compatible).
MIPS
Xscale
ARM9