CS225 IF example

cs224_121010.pep

;program for if(x>2) 1; else 0;
BR main,i
x: .BLOCK 2 ;global variable #2d

main: NOP0
charo 'm',i
deci x,d
lda x,d ;A is now x
cpa 2,i ;accumulator-preserving subtraction, flags reflect x-2
;now that flags are set, branch RIGHT AWAY!!!!!!1!111!!!
BRGT yes,i ;branch if flags for (x-2) indicate > 0

no: NOP0
charo 'n',i
LDA 0,i
STA x,d
BR fi,i

yes: NOP0
charo 'y',i
LDA 1,i
STA x,d
BR fi,i


fi: NOP0
charo 'f',i
DECO x,d
STOP
.END