Question

In ARM assembly program calculate the absolute value of son x variable a.

Answer 1

Ans .1.
#Lets find absolute value of r1
        ori $2, $zero, $1      #make a copy of r1 and store in r2
        slt $3, $1, $zero      #checks if r1 is negative
        beq $3, $zero, next    #if r1 is positive, skip next inst
        sub $2, $zero, $1      #r2 = 0 - r1
next:
#r2 has the absolute value of r1