Write an LC3 program that would implement if (x == 0) then y = y + 1; else y = y - 1;. Assume than variables x and y are...
Write an LC3 program that would implement if (x == 0) then y = y + 1; else y = y - 1;. Assume than variables x and y are at locations with labels x and y, respectively.
Homework Answers
LD R0, x ;load x
BRnp ELSE
; if x is zero then it will enter in clause else
branch to ELSE
LD R1, y ;
load y for add 1 in y
ADD R1, R1, #1
LD R1, y ;
restore R1 in y
BR END_ELSE
ELSE
LD R2, y ;
load y in R2
LD R3, #1 ;
load 1 in R3
NOT R3, R3
; taking compliment for subtraction
ADD R3, R3, 1
ADD R2, R2, R3 ; (y=y-1)
LD R2, y ;
restore R2 in y
// if you got your solution then please give like to question
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