please help!! In the space below, write MIPS code for a leaf subroutine mymul th

Question

please help!!

In the space below, write MIPS code for a leaf subroutine mymul that will compute x = y*z;. Although there are many ways to do a multiply, here's C code for one of them that you might want to use: extern int x, y, z; void my mul(void) {/* do x = y * z the hard way... */int t0 = 0; int t1 = 1; int t2 = y; int t3 = z; while (t1 ! = 0) {if (t1 & t3) ! 0) {t0 += t2;} t1 += t1; t2 += t2;} x = t0;} #### # # Multiplication routine: # # x = y * z # .text .globl mymul mymul: # # Your code here # jr $ra #return

Explanation / Answer

mymul:

move $t0,0 # t0 = 0

move $t1,1 # t1 = 1

lw $t2,y # t2 = y

lw $t3,z   # t3 = z

while: # while loop

beq $t1,0,end # break While condition ( t1 != 0)

and $t6,$t1,$t3 # t6 = t1 & t3

bne $t6,$0,if # if t6 != 0

next:

add $t1,$t1,$t1 # t1 += t1

add $t2,$t2,$t2   # t2 += t2

if:

add $t0,$t0,$t2

j next

end:

sw $t0,x # x = t0

jr $ra

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