Question

2. Write a MIPS program that translates the following C code int a 1234; b 5678 int sum void main () atb sum = cout <<sum; }

Answer 1

.globl a

.data

.align 2

.type a, @object

.size a, 4

a:

.word 1234

.globl b

.align 2

.type b, @object

.size b, 4

b:

.word 5678

.comm sum,4,4

.rdata

.align 2

$LC0:

.ascii "%d\000"

.text

.align 2

.globl main

.ent main

.type main, @function

main:

.frame $fp,32,$31 # vars= 0, regs= 2/0, args= 16, gp= 8

.mask 0xc0000000,-4

.fmask 0x00000000,0

.set noreorder

.cpload $25

.set nomacro

addiu $sp,$sp,-32

sw $31,28($sp)

sw $fp,24($sp)

move $fp,$sp

.cprestore 16

movz $31,$31,$0

lw $2,%got(a)($28)

nop

lw $3,0($2)

lw $2,%got(b)($28)

nop

lw $2,0($2)

nop

addu $3,$3,$2

lw $2,%got(sum)($28)

nop

sw $3,0($2)

lw $2,%got(sum)($28)

nop

lw $2,0($2)

nop

move $5,$2

lw $2,%got($LC0)($28)

nop

addiu $4,$2,%lo($LC0)

lw $2,%call16(printf)($28)

nop

move $25,$2

.reloc 1f,R_MIPS_JALR,printf

1: jalr $25

nop

lw $28,16($fp)

move $2,$0

move $sp,$fp

lw $31,28($sp)

lw $fp,24($sp)

addiu $sp,$sp,32

j $31

nop