old math 2011

#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");
}