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openpower.foundation_sw_dev/content/specifications/powerisa207.md

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POWER Instruction Set Architecture 2.07 false 2022-01-01 true

The Power Instruction Set Architecture (ISA) Version 2.07B is a specification that describes the architecture used for the IBM® POWER8®, IBM® POWER8® with NVIDIA® NVLink™ Technology, the Suzhou Powercore Technology CP1 processor & prior IBM Power Architecture® processors. It defines the instructions the processors execute. It consists of five books and a set of appendices.

  • Book I, Power ISA User Instruction Set Architecture, covers the base instruction set and related facilities available to the application programmer.
  • Book II, Power ISA Virtual Environment Architecture, defines the storage model and related instructions and facilities available to the application programmer.
  • Book III-S, Power ISA Operating Environment Architecture - Server Environment, defines the supervisor instructions and related facilities used for general purpose implementations.
  • Book III-E, Power ISA Operating Environment Architecture - Embedded Environment, defines the supervisor instructions and related facilities used for embedded implementations.
  • Book VLE, Power ISA Operating Environment Architecture - Variable Length Encoding (VLE) Instructions Architecture, defines alternative instruction encoding and definitions intended to increase instruction density for very low end implementations.

The Power ISA specification is an important resource for software developers especially compiler and tool chain developers. Firmware and operating system developers will also find it essential.