Question

Can someone write a method in MIPS assembly language that asks the user for a hexadecimal value and converts it into a decimal?

Answer 1

• .data

• x: .word 0x8456

• .text

• lw $s0,x #s0 = x

• addiu $t0,$zero,31 #(t0) i == 31 (the counter)

• li $t1,1 #(t1) mask

• sll $t1,$t1,31

• li $v0,1 #prepare system call for printing values

• loop: beq $t0,-1,end_loop #if t0 == -1 exit loop

• and $t3,$s0,$t1 #isolate the bit

• beq $t0,$0,after_shift #shift is needed only if t0 > 0

• srlv $t3,$t3,$t0 #right shift before display

• after_shift:

• move $a0,$t3 #prepare bit for print

• syscall #print bit

• subi $t0, $t0, 1 #decrease the counter

• srl $t1,$t1, 1 #right shift the mask

• j loop

• end_loop:

• #the above will print:

• #00000000000000001000010001010110