user: 请将以下的汇编代码转换成C语言代码:

```asm
<main>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x60,%rsp
  mov    %edi,-0x54(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  movl   $0x0,-0x50(%rbp)
  movl   $0x0,-0x4c(%rbp)
  cmpl   $0x0,-0x54(%rbp)
  je     L88
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  test   %rax,%rax
  je     L88
  mov    -0x60(%rbp),%rax
  add    $0x8,%rax
  mov    (%rax),%rax
  mov    $0x0,%edx
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <strtoul@plt>
  mov    %rax,-0x48(%rbp)
  jmp    L10
L88:
  movq   $0x28,-0x48(%rbp)
L10:
  lea    -0x30(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <gettimeofday@plt>
  mov    %eax,-0x4c(%rbp)
  cmpl   $0x0,-0x4c(%rbp)
  je     L32
  lea    D46(%rip),%rax
  mov    %rax,%rdi
  call   <perror@plt>
  mov    $0x1,%eax
  jmp    L96
L32:
  mov    -0x48(%rbp),%rax
  mov    %rax,%rdi
  call   <fibo_ite@plt>
  mov    %eax,%ecx
  mov    -0x48(%rbp),%rax
  test   %rax,%rax
  js     L16
  pxor   %xmm3,%xmm3
  cvtsi2sd %rax,%xmm3
  movq   %xmm3,%rax
  jmp    L70
L16:
  mov    %rax,%rdx
  shr    %rdx
  and    $0x1,%eax
  or     %rax,%rdx
  pxor   %xmm0,%xmm0
  cvtsi2sd %rdx,%xmm0
  addsd  %xmm0,%xmm0
  movq   %xmm0,%rax
L70:
  mov    %ecx,%esi
  movq   %rax,%xmm0
  lea    D22(%rip),%rax
  mov    %rax,%rdi
  mov    $0x1,%eax
  call   <printf@plt>
  lea    -0x20(%rbp),%rax
  mov    $0x0,%esi
  mov    %rax,%rdi
  call   <gettimeofday@plt>
  mov    %eax,-0x4c(%rbp)
  cmpl   $0x0,-0x4c(%rbp)
  je     L71
  lea    D28(%rip),%rax
  mov    %rax,%rdi
  call   <perror@plt>
  mov    $0x1,%eax
  jmp    L96
L71:
  mov    -0x28(%rbp),%rax
  pxor   %xmm1,%xmm1
  cvtsi2sd %rax,%xmm1
  mov    -0x30(%rbp),%rax
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  movsd  D48(%rip),%xmm2
  divsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x40(%rbp)
  mov    -0x18(%rbp),%rax
  pxor   %xmm1,%xmm1
  cvtsi2sd %rax,%xmm1
  mov    -0x20(%rbp),%rax
  pxor   %xmm0,%xmm0
  cvtsi2sd %rax,%xmm0
  movsd  D48(%rip),%xmm2
  divsd  %xmm2,%xmm0
  addsd  %xmm1,%xmm0
  movsd  %xmm0,-0x38(%rbp)
  movsd  -0x38(%rbp),%xmm0
  subsd  -0x40(%rbp),%xmm0
  movq   %xmm0,%rax
  movq   %rax,%xmm0
  lea    D11(%rip),%rax
  mov    %rax,%rdi
  mov    $0x1,%eax
  call   <printf@plt>
  mov    $0x0,%eax
L96:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L9
  call   <__stack_chk_fail@plt>
L9:
  leave
  ret
```

tool_calls: name: extract_symbolic_data
arguments: data_tag: D46
data_type: string
name: extract_symbolic_data
arguments: data_tag: D22
data_type: string
name: extract_symbolic_data
arguments: data_tag: D28
data_type: string
name: extract_symbolic_data
arguments: data_tag: D48
data_type: f64
name: extract_symbolic_data
arguments: data_tag: D11
data_type: string

tool: D46: start gettime error


tool: D22: fibo_ite %lu: %lf


tool: D28: end gettime error


tool: D48: 1000000

tool: D11: %lf elapsed


assistant: ```c
int main(int argc, char **argv) {
  int i = 0;
  int ret = 0;
  struct timeval start, end;
  double s, e;
  unsigned long int n;
  if (argc != 0 && argv[1])
    n = strtoul(argv[1], NULL, 0);
  else
    n = 40;
  ret = gettimeofday(&start, NULL);
  if (ret != 0) {
    perror("start gettime error\n");
    return 1;
  }
  printf("fibo_ite %lu: %lf\n", n, fibo_ite(n));
  ret = gettimeofday(&end, NULL);
  if (ret != 0) {
    perror("end gettime error\n");
    return 1;
  }
  s = (double)start.tv_sec + (double)start.tv_usec / 1000000.0;
  e = (double)end.tv_sec + (double)end.tv_usec / 1000000.0;
  printf("%lf elapsed\n", e - s);
  return 0;
}
```