Early Branch Detection

• Branches detected in parallel with decoding of other branches using dedicated branch decoder

  • Alpha 21064, 21164, PowerPC 601

• Branches detected from instruction buffer, but ahead of general instruction decoding

  • Power1, Power2, PowerPC 603

• Branches detected during instruction fetch

  • PowerPC 602, 620
  • HP PA 8000
  • R8000

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