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What is REP prefix? How it functions for string instructions?
written 9.4 years ago by gravatar for teamques10 teamques10 ★ 70k modified 3.1 years ago by gravatar for sagarkolekar sagarkolekar ★ 11k
microprocessors and microcontrollers
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written 9.4 years ago by gravatar for teamques10 teamques10 ★ 70k

Mnemonic: REP

Operation:

  • This is an instruction prefix which can be used in string instructions.
  • It can be used with string instructions only.
  • It causes the instruction to be repeated CX number of times.
  • After each execution, the SI and DI registers are incremented/decremented based on the DF (Direction …

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