user: 这段汇编代码用C语言表示是什么样的?

```asm
<utc2local>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %edi,-0x24(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    %rcx,-0x40(%rbp)
  mov    %r8,-0x48(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  mov    $0x0,%edi
  call   <time@plt>
  mov    %eax,-0x14(%rbp)
  lea    -0x14(%rbp),%rax
  mov    %rax,%rdi
  call   <gmtime@plt>
  mov    %rax,-0x10(%rbp)
  mov    -0x24(%rbp),%eax
  movslq %eax,%rdx
  imul   $0x51eb851f,%rdx,%rdx
  shr    $0x20,%rdx
  sar    $0x5,%edx
  sar    $0x1f,%eax
  sub    %eax,%edx
  mov    -0x10(%rbp),%rax
  mov    %edx,(%rax)
  mov    -0x24(%rbp),%edx
  movslq %edx,%rax
  imul   $0x51eb851f,%rax,%rax
  shr    $0x20,%rax
  sar    $0x5,%eax
  mov    %edx,%ecx
  sar    $0x1f,%ecx
  sub    %ecx,%eax
  imul   $0x64,%eax,%ecx
  mov    %edx,%eax
  sub    %ecx,%eax
  mov    -0x10(%rbp),%rdx
  mov    %eax,0x4(%rdx)
  cmpq   $0x0,-0x30(%rbp)
  je     L87
  mov    -0x30(%rbp),%rax
  mov    (%rax),%eax
  cmp    $0xffffffff,%eax
  je     L87
  mov    -0x30(%rbp),%rax
  mov    (%rax),%eax
  lea    -0x1(%rax),%edx
  mov    -0x10(%rbp),%rax
  mov    %edx,0x8(%rax)
L87:
  cmpq   $0x0,-0x38(%rbp)
  je     L56
  mov    -0x38(%rbp),%rax
  mov    (%rax),%eax
  cmp    $0xffffffff,%eax
  je     L56
  mov    -0x38(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x10(%rbp),%rax
  mov    %edx,0xc(%rax)
L56:
  cmpq   $0x0,-0x40(%rbp)
  je     L96
  mov    -0x40(%rbp),%rax
  mov    (%rax),%eax
  cmp    $0xffffffff,%eax
  je     L96
  mov    -0x40(%rbp),%rax
  mov    (%rax),%edx
  mov    -0x10(%rbp),%rax
  mov    %edx,0x10(%rax)
L96:
  mov    -0x10(%rbp),%rax
  mov    %rax,%rdi
  call   <mkgmtime@plt>
  mov    %eax,-0x14(%rbp)
  lea    -0x14(%rbp),%rax
  mov    %rax,%rdi
  call   <localtime@plt>
  mov    %rax,-0x10(%rbp)
  cmpq   $0x0,-0x30(%rbp)
  je     L8
  mov    -0x10(%rbp),%rax
  mov    0x8(%rax),%eax
  lea    0x1(%rax),%edx
  mov    -0x30(%rbp),%rax
  mov    %edx,(%rax)
L8:
  cmpq   $0x0,-0x38(%rbp)
  je     L5
  mov    -0x10(%rbp),%rax
  mov    0xc(%rax),%edx
  mov    -0x38(%rbp),%rax
  mov    %edx,(%rax)
L5:
  cmpq   $0x0,-0x40(%rbp)
  je     L59
  mov    -0x10(%rbp),%rax
  mov    0x10(%rax),%edx
  mov    -0x40(%rbp),%rax
  mov    %edx,(%rax)
L59:
  cmpq   $0x0,-0x48(%rbp)
  je     L62
  mov    -0x10(%rbp),%rax
  mov    0x14(%rax),%edx
  mov    -0x48(%rbp),%rax
  mov    %edx,(%rax)
L62:
  mov    -0x10(%rbp),%rax
  mov    (%rax),%eax
  imul   $0x64,%eax,%edx
  mov    -0x10(%rbp),%rax
  mov    0x4(%rax),%eax
  add    %edx,%eax
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L89
  call   <__stack_chk_fail@plt>
L89:
  leave
  ret
```

assistant: ```c
int utc2local(int hm, int *month, int *day, int *year, int *wday) {
  time_t t = time(NULL);
  struct tm *tm;
  tm = gmtime(&t);
  tm->tm_hour = hm / 100;
  tm->tm_min = hm % 100;
  if (month != NULL && *month != -1)
    tm->tm_mon = *month - 1;
  if (day != NULL && *day != -1)
    tm->tm_mday = *day;
  if (year != NULL && *year != -1)
    tm->tm_year = *year;
  t = mkgmtime(tm);
  tm = localtime(&t);
  if (month != NULL)
    *month = tm->tm_mon + 1;
  if (day != NULL)
    *day = tm->tm_mday;
  if (year != NULL)
    *year = tm->tm_year;
  if (wday != NULL)
    *wday = tm->tm_wday;
  return tm->tm_hour * 100 + tm->tm_min;
}
```