#include<stdio.h>
#include<stdlib.h>

long square_number(long);	

asm("square_number: \n"
	"	mov %rdi, %rax \n"
	"	add %rax, %rax \n"
	"	ret\n"
);

long fibonacci(long);
asm("fibonacci:\n"
	"	cmp $0, %rdi\n"
	"	jne not_0\n"
	"	mov $0, %rax\n"
	"	mov $0, %rbx\n"
	"	ret\n"
	"not_0:\n"
	"	cmp $1, %rdi\n"
	"	jne not_1\n"
	"	mov $1, %rax\n"
	"	mov $0, %rbx\n"
	"	ret\n"
	"not_1:\n"
	"	dec %rdi\n"
	"	call fibonacci\n" // After this, %rax is fib(n), %rbx is fib(n-1)
	"	mov %rax, %r10\n"
	"	add %rbx, %rax\n"
	"	mov %r10, %rbx\n"
	"	ret\n" );

int main(int argc, char ** argv){
	int x = 500;
	if(argc > 1)
		x = atoi(argv[1]);

	x = square_number(x);

	printf("x = %d\n", x);
	for(long i = 0; i < 90; i++)
		printf("fib(%ld) = %ld\n", i, fibonacci(i));

	return 0;
}