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  CPU to ISA Version Mapping
  ==========================
  
  Mapping of some CPU versions to relevant ISA versions.
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  CPU       Architecture version
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  Power9    Power ISA v3.0B
  Power8    Power ISA v2.07
  Power7    Power ISA v2.06
  Power6    Power ISA v2.05
  PA6T      Power ISA v2.04
  Cell PPU  - Power ISA v2.02 with some minor exceptions
            - Plus Altivec/VMX ~= 2.03
  Power5++  Power ISA v2.04 (no VMX)
  Power5+   Power ISA v2.03
  Power5    - PowerPC User Instruction Set Architecture Book I v2.02
            - PowerPC Virtual Environment Architecture Book II v2.02
            - PowerPC Operating Environment Architecture Book III v2.02
  PPC970    - PowerPC User Instruction Set Architecture Book I v2.01
            - PowerPC Virtual Environment Architecture Book II v2.01
            - PowerPC Operating Environment Architecture Book III v2.01
            - Plus Altivec/VMX ~= 2.03
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  Key Features
  ------------
  
  ========== ==================
  CPU        VMX (aka. Altivec)
  ========== ==================
  Power9     Yes
  Power8     Yes
  Power7     Yes
  Power6     Yes
  PA6T       Yes
  Cell PPU   Yes
  Power5++   No
  Power5+    No
  Power5     No
  PPC970     Yes
  ========== ==================
  
  ========== ====
  CPU        VSX
  ========== ====
  Power9     Yes
  Power8     Yes
  Power7     Yes
  Power6     No
  PA6T       No
  Cell PPU   No
  Power5++   No
  Power5+    No
  Power5     No
  PPC970     No
  ========== ====
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  CPU        Transactional Memory
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  Power9     Yes (* see transactional_memory.txt)
  Power8     Yes
  Power7     No
  Power6     No
  PA6T       No
  Cell PPU   No
  Power5++   No
  Power5+    No
  Power5     No
  PPC970     No
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  ========== ====================================