Condition Code Checking (cond)

• Direct Checking (use of General Purpose Registers)

  • Directly test general purpose register values sub r1, r2, r3 ; see if r2 = r3 bz r1, someplace ; take branch if r1 is zero
  • Does not require special Condition Registers and special handling for Condition Registers
  • Uses up general purpose registers
    • Basically use one entire register to hold a single branch condition
  • Central Reservation Table already tracks dependencies between general purpose registers so no special handling needed

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