Comparison Results from Signed and unsigned numbers in Assembly

Comparison Results for Signed and Unsigned Numbers:

• DEST = SRC:

  • ZF = 1 (Zero flags are set)

• UDEST < USRC:

  • CF = 1 (Carry flag is set)

• UDEST ≤ USRC:

  • ZF = 1 OR CF = 1 (Either Zero flag or Carry flag is set)

• UDEST ≥ USRC:

  • CF = 0 (Carry flag is not set)

• UDEST > USRC:

  • ZF = 0 AND CF = 0 (Zero flag and Carry flag are not set)

• Signed

  • SDEST < SSRC: SF ≠ OF

  • SDEST ≤ SSRC: ZF = 1 or SF ≠ OF

  • SDEST ≥ SSRC: SF = OF

  • SDEST > SSRC: ZF = 0 and SF = OF

• Notes

  ZF = Zero Flag and CF= Carry Flag