fib_iter.o:     file format elf64-x86-64


Disassembly of section .text:

0000000000000000 <fib_iter>:
#include <stdio.h>
#include <stdlib.h>

unsigned long long fib_iter(unsigned long long a)
{
   0:	55                   	push   %rbp
   1:	48 89 e5             	mov    %rsp,%rbp
   4:	48 89 7d d8          	mov    %rdi,-0x28(%rbp)
  unsigned long long r = 0;
   8:	48 c7 45 f8 00 00 00 	movq   $0x0,-0x8(%rbp)
   f:	00 
  unsigned long long minus_one = 1;
  10:	48 c7 45 f0 01 00 00 	movq   $0x1,-0x10(%rbp)
  17:	00 
  unsigned long long minus_two = 0;
  18:	48 c7 45 e8 00 00 00 	movq   $0x0,-0x18(%rbp)
  1f:	00 
  unsigned long long i;

  if (a == 0) {
  20:	48 83 7d d8 00       	cmpq   $0x0,-0x28(%rbp)
  25:	75 0a                	jne    31 <fib_iter+0x31>
    r = 0;
  27:	48 c7 45 f8 00 00 00 	movq   $0x0,-0x8(%rbp)
  2e:	00 
  2f:	eb 49                	jmp    7a <fib_iter+0x7a>
  } else if (a == 1) {
  31:	48 83 7d d8 01       	cmpq   $0x1,-0x28(%rbp)
  36:	75 0a                	jne    42 <fib_iter+0x42>
    r = 1;
  38:	48 c7 45 f8 01 00 00 	movq   $0x1,-0x8(%rbp)
  3f:	00 
  40:	eb 38                	jmp    7a <fib_iter+0x7a>
  } else {
    for (i = 2; i <= a; i++) {
  42:	48 c7 45 e0 02 00 00 	movq   $0x2,-0x20(%rbp)
  49:	00 
  4a:	eb 24                	jmp    70 <fib_iter+0x70>
      r = minus_one + minus_two;
  4c:	48 8b 55 f0          	mov    -0x10(%rbp),%rdx
  50:	48 8b 45 e8          	mov    -0x18(%rbp),%rax
  54:	48 01 d0             	add    %rdx,%rax
  57:	48 89 45 f8          	mov    %rax,-0x8(%rbp)
      minus_two = minus_one;
  5b:	48 8b 45 f0          	mov    -0x10(%rbp),%rax
  5f:	48 89 45 e8          	mov    %rax,-0x18(%rbp)
      minus_one = r;
  63:	48 8b 45 f8          	mov    -0x8(%rbp),%rax
  67:	48 89 45 f0          	mov    %rax,-0x10(%rbp)
  if (a == 0) {
    r = 0;
  } else if (a == 1) {
    r = 1;
  } else {
    for (i = 2; i <= a; i++) {
  6b:	48 83 45 e0 01       	addq   $0x1,-0x20(%rbp)
  70:	48 8b 45 e0          	mov    -0x20(%rbp),%rax
  74:	48 3b 45 d8          	cmp    -0x28(%rbp),%rax
  78:	76 d2                	jbe    4c <fib_iter+0x4c>
      minus_two = minus_one;
      minus_one = r;
    }
  }

  return r;
  7a:	48 8b 45 f8          	mov    -0x8(%rbp),%rax
}
  7e:	5d                   	pop    %rbp
  7f:	c3                   	retq   

0000000000000080 <main>:

int main(int argc, char *argv[])
{
  80:	55                   	push   %rbp
  81:	48 89 e5             	mov    %rsp,%rbp
  84:	48 83 ec 20          	sub    $0x20,%rsp
  88:	89 7d ec             	mov    %edi,-0x14(%rbp)
  8b:	48 89 75 e0          	mov    %rsi,-0x20(%rbp)
  unsigned long long a = 0;
  8f:	48 c7 45 f8 00 00 00 	movq   $0x0,-0x8(%rbp)
  96:	00 
  unsigned long long r = 0;
  97:	48 c7 45 f0 00 00 00 	movq   $0x0,-0x10(%rbp)
  9e:	00 

  a = atol(argv[1]);
  9f:	48 8b 45 e0          	mov    -0x20(%rbp),%rax
  a3:	48 83 c0 08          	add    $0x8,%rax
  a7:	48 8b 00             	mov    (%rax),%rax
  aa:	48 89 c7             	mov    %rax,%rdi
  ad:	e8 00 00 00 00       	callq  b2 <main+0x32>
  b2:	48 89 45 f8          	mov    %rax,-0x8(%rbp)
  r = fib_iter(a);
  b6:	48 8b 45 f8          	mov    -0x8(%rbp),%rax
  ba:	48 89 c7             	mov    %rax,%rdi
  bd:	e8 00 00 00 00       	callq  c2 <main+0x42>
  c2:	48 89 45 f0          	mov    %rax,-0x10(%rbp)
  printf("fib(%llu) = %llu\n",a,r);
  c6:	48 8b 55 f0          	mov    -0x10(%rbp),%rdx
  ca:	48 8b 45 f8          	mov    -0x8(%rbp),%rax
  ce:	48 89 c6             	mov    %rax,%rsi
  d1:	bf 00 00 00 00       	mov    $0x0,%edi
  d6:	b8 00 00 00 00       	mov    $0x0,%eax
  db:	e8 00 00 00 00       	callq  e0 <main+0x60>
  return 0;
  e0:	b8 00 00 00 00       	mov    $0x0,%eax
}
  e5:	c9                   	leaveq 
  e6:	c3                   	retq