Princess Sumaya Univ. Computer Engineering Dept. Chapter 6:

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Presentation transcript:

Princess Sumaya Univ. Computer Engineering Dept. Chapter 6:

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 1 / 11 Boolean Instructions  AND ●ANDreg, reg ●AND reg, mem ●AND reg, imm ●AND mem, reg ●AND mem, imm  Sign, Zero Flags  OR  XOR  NOT

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 2 / 11 Boolean Instructions Example:ASCII Case: A = a = Sentence = “I aM A sTudeNT”

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 3 / 11 Boolean Instructions  TEST (Similar to AND) ●TESTreg, reg ●TEST reg, mem ●TEST reg, imm ●TEST mem, reg ●TEST mem, imm  Sign, Zero Flags

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 4 / 11 Compare Instruction  CMP (Similar to SUB) ●CMPreg, reg ●CMP reg, mem ●CMP reg, imm ●CMP mem, reg ●CMP mem, imm  Carry, Overflow, Sign, Zero Flags

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 5 / 11 Jump on Condition Instructions  Jcondition Label ●Zero ●Carry ●Overflow ●Sign ●CX = 0

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 6 / 11 Jump on Compare Result  Unsigned Comparison (CMP X, Y) ●X > Y ●X ≥ Y ●X = Y ●X < Y ●X ≤ Y

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 7 / 11 Jump on Compare Result  Signed Comparison (CMP X, Y) ●X > Y ●X ≥ Y ●X = Y ●X < Y ●X ≤ Y

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 8 / 11 Jump on Compare Result Example: Z = MAX ( X, Y )

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 9 / 11 Jump on Compare Result Example: D = MIN ( A, B, C )

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 10 / 11 Jump on Compare Result Example: Find the first nonzero element in an array

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. 11 / 11 LOOP on Condition (Repeat While)  LOOPZ (LOOPE) ●Decrement the Counter ●If Counter > 0 and ZF = 1 jump to label  LOOPNZ (LOOPNE)

Princess Sumaya University – Computer Org. & Assembly Lang. Computer Engineering Dept. Chapter 6