PowerPC

PowerPC

Designer	AIM
Bits	32-bit/64-bit (32 → 64)
Introduced	October 1992; 32 years ago (1992-10)
Version	2.02[1]
Design	RISC
Type	Load–store
Encoding	Fixed/Variable (Book E)
Branching	Condition code
Endianness	Big/Bi
Extensions	AltiVec, PowerPC AS, APU
Successor	Power ISA
Registers
General-purpose	32
Floating point	32
Vector	32 (with AltiVec)

PowerPC (with the backronym Performance Optimization With Enhanced RISC – Performance Computing, sometimes abbreviated as PPC) is a reduced instruction set computer (RISC) instruction set architecture (ISA) created by the 1991 Apple–IBM–Motorola alliance, known as AIM. PowerPC, as an evolving instruction set, has been named Power ISA since 2006, while the old name lives on as a trademark for some implementations of Power Architecture–based processors.

Originally intended for personal computers, the architecture is well known for being used by Apple's desktop and laptop lines from 1994 until 2006, and in several videogame consoles including Microsoft's Xbox 360, Sony's PlayStation 3, and Nintendo's GameCube, Wii, and Wii U. PowerPC was also used for the Curiosity and Perseverance rovers on Mars and a variety of satellites. It has since become a niche architecture for personal computers, particularly with AmigaOS 4 implementations, but remains popular for embedded systems.

PowerPC was the cornerstone of AIM's PReP and Common Hardware Reference Platform (CHRP) initiatives in the 1990s. It is largely based on the earlier IBM POWER architecture, and retains a high level of compatibility with it; the architectures have remained close enough that the same programs and operating systems will run on both if some care is taken in preparation; newer chips in the Power series use the Power ISA.