lol calc

/*
 *
 *   gcc -m32 -o code code.c
 *   author: Antonio Costa aka Cooler_
 *   contact: [email protected]
 *   bugsec.com.br
 *
 *   very simple calc test
 *   */
#include <stdio.h>

#define w printf
#define foo (int,int)
#define num "%d\x0a"

int add foo;
int sub foo;
int mul foo;
int div foo;

void
main(void)
{
 register int a=5,b=30;
 w("A=%d B=%d \x0a",a,b);
 w(num, add(a,b))&w(num, sub(a,b));
 w(num, mul(a,b))&w(num, div(a,b));
}

int add(int a, int b)
{
 __asm__("movl 8(%ebp), %ebx\n"
     "movl 12(%ebp), %eax\n"
     "addl %ebx, %eax\n");
}

int sub(int a, int b)
{
 __asm__("movl 8(%ebp), %ebx\n"
     "movl 12(%ebp), %eax\n"
     "subl %ebx, %eax\n");
}

int mul(int a, int b)
{
 __asm__("movl 8(%ebp), %ebx\n"
     "movl 12(%ebp), %eax\n"
     "imul %ebx, %eax\n");
}

int div(int a, int b)
{
 __asm__("movl 8(%ebp), %ebx\n"
     "movl 12(%ebp), %eax\n"
     "divl %ebx, %eax\n");
}