Conditional: if-else

if-else

if ( i == j )

$s1

i

i++ ;

$s2

j

else

j-- ;

j += i ;

As before, if the condition is false, we want to jump.

bne  $s1, $s2, ELSE   # branch if !( i == j )

addi $s1, $s1, 1      #    i++

ELSE: addi $s2, $s2, -1     # else j--

add $s2, $s2, $s1     # j += i

What's wrong with this picture?

Once we've done the if-body, we need to jump over the else-body

bne  $s1, $s2, ELSE   # branch if !( i == j )

addi $s1, $s1, 1      #    i++

j NEXT                #    jump over else

ELSE: addi $s2, $s2, -1     # else j--

NEXT:   add $s2, $s2, $s1   # j += i