I am working on a while loop for a mips program that generates the odds of winning the lottery. Here is what I have so far. Could you advise if you think this will work? Using an example of 59 picks with 3 balls.
Load 59 into $t0
Load 3 into $t1
Load 1 into $t2
Load 1 into $t3
Loop: while $t1 > 0
Divide $t2 by $t0 and put in $t4
Multiply $t4 by $t3 and put in $t3
Subtract $t1 by 1 #subtracts balls by 1
Subtract $t0 by 1 #subtracts max picks by
**repeat loop**
Could someone advise if this is possible in mips as I am just working on my first program and only have a Java background.
Yes, this is possible, but you have to put it in float-point registers $f0 ... $f31:
li $t0 , 59 // values assignment to temporary registers
li $t1 , 3
mtc1 $t0,$f0 //move from int register to float-point register
cvt.s.w $f0,$f0 //Convert int values to float-point values
mtc1 $t1,$f1
cvt.s.w $f1,$f1 //Convert int values to float-point values
li $t2 , 1
li $t3 , 1
mtc1 $t2, $f2
cvt.s.w $f2,$f2
mtc1 $t3, $f3
cvt.s.w $f3,$f3
li $t6 , 1
mtc1 $t6, $f6
cvt.s.w $f6,$f6
//Start of the while loop
li $t5, 0
mtc1 $t5, $f5
cvt.s.w $f5,$f5
while : c.gt.s $f1, $f5
bc1f endwhile
//checks the intital condition and if it's false jump to endwhile
div.s $f4,$f2,$f0 // $f4 = $f2/$f0
mult.s $f3, $f3 ,$f4 // $f3 = $f3 * $f4
sub.s $f0, $f0, $f6
sub.s $f1, $f1, $f6
b while //jump to label while
endwhile: // your code
If you have any trouble, maybe you can check this webpages, think it's a good reference : http://logos.cs.uic.edu/366/notes/mips%20quick%20tutorial.htm http://www.cim.mcgill.ca/~langer/273/12-coprocessors.pdf