Convert the following high-level language into MIPS instructions. Please write comments for each instructions. Assume a, b, c, d are associated with registers $s0, $s1, $s2, $s3, respectively. void ma...
Convert the following high-level language into MIPS instructions. Please write comments for each instructions. Assume a, b, c, d are associated with registers $s0, $s1, $s2, $s3, respectively.
void main ()
{
int a = 10, b = 20;
int c = add(a, b);
int d = sub(a, b);
swap (a, b);
}
int add( int var1, int var2)
{ return (var1 + var2); }
int sub(int var1, int var2)
{ return (var1 - var2); }
void swap(int var1, int var2)
{
int tmp = var1;
var1 = var2;
var2 = tmp;
}
MIPS Instruction Set- Machine Language
Homework Answers
.file 1 ""
.section .mdebug.abi32
.previous
.nan legacy
.module fp=32
.module nooddspreg
.abicalls
.text
.align 2
.globl main
.set nomips16
.set nomicromips
.ent main
.type main, @function
main:
.frame $fp,48,$31 # vars= 16, regs= 2/0, args= 16, gp= 8
.mask 0xc0000000,-4
.fmask 0x00000000,0
.set noreorder
.cpload $25
.set nomacro
addiu $sp,$sp,-48
sw $31,44($sp)
sw $fp,40($sp)
move $fp,$sp
.cprestore 16
movz $31,$31,$0
li $2,10 # 0xa
sw $2,24($fp)
li $2,20 # 0x14
sw $2,28($fp)
lw $5,28($fp)
lw $4,24($fp)
lw $2,%got(add)($28)
nop
move $25,$2
.reloc 1f,R_MIPS_JALR,add
1: jalr $25
nop
lw $28,16($fp)
sw $2,32($fp)
lw $5,28($fp)
lw $4,24($fp)
lw $2,%got(sub)($28)
nop
move $25,$2
.reloc 1f,R_MIPS_JALR,sub
1: jalr $25
nop
lw $28,16($fp)
sw $2,36($fp)
lw $5,28($fp)
lw $4,24($fp)
lw $2,%got(swap)($28)
nop
move $25,$2
.reloc 1f,R_MIPS_JALR,swap
1: jalr $25
nop
lw $28,16($fp)
nop
move $sp,$fp
lw $31,44($sp)
lw $fp,40($sp)
addiu $sp,$sp,48
j $31
nop
.set macro
.set reorder
.end main
.size main, .-main
.align 2
.globl add
.set nomips16
.set nomicromips
.ent add
.type add, @function
add:
.frame $fp,8,$31 # vars= 0, regs= 1/0, args= 0, gp= 0
.mask 0x40000000,-4
.fmask 0x00000000,0
.set noreorder
.set nomacro
addiu $sp,$sp,-8
sw $fp,4($sp)
move $fp,$sp
sw $4,8($fp)
sw $5,12($fp)
movz $31,$31,$0
lw $3,8($fp)
lw $2,12($fp)
nop
addu $2,$3,$2
move $sp,$fp
lw $fp,4($sp)
addiu $sp,$sp,8
j $31
nop
.set macro
.set reorder
.end add
.size add, .-add
.align 2
.globl sub
.set nomips16
.set nomicromips
.ent sub
.type sub, @function
sub:
.frame $fp,8,$31 # vars= 0, regs= 1/0, args= 0, gp= 0
.mask 0x40000000,-4
.fmask 0x00000000,0
.set noreorder
.set nomacro
addiu $sp,$sp,-8
sw $fp,4($sp)
move $fp,$sp
sw $4,8($fp)
sw $5,12($fp)
movz $31,$31,$0
lw $3,8($fp)
lw $2,12($fp)
nop
subu $2,$3,$2
move $sp,$fp
lw $fp,4($sp)
addiu $sp,$sp,8
j $31
nop
.set macro
.set reorder
.end sub
.size sub, .-sub
.align 2
.globl swap
.set nomips16
.set nomicromips
.ent swap
.type swap, @function
swap:
.frame $fp,24,$31 # vars= 8, regs= 1/0, args= 0, gp= 8
.mask 0x40000000,-4
.fmask 0x00000000,0
.set noreorder
.set nomacro
addiu $sp,$sp,-24
sw $fp,20($sp)
move $fp,$sp
sw $4,24($fp)
sw $5,28($fp)
movz $31,$31,$0
lw $2,24($fp)
nop
sw $2,8($fp)
lw $2,28($fp)
nop
sw $2,24($fp)
lw $2,8($fp)
nop
sw $2,28($fp)
nop
move $sp,$fp
lw $fp,20($sp)
addiu $sp,$sp,24
j $31
nop
.set macro
.set reorder
.end swap
.size swap, .-swap
.ident "GCC: (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609"
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