user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<get_latlong>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %r12
  push   %rbx
  sub    $0x50,%rsp
  mov    %rdi,-0x48(%rbp)
  mov    %rsi,-0x50(%rbp)
  mov    %rdx,-0x58(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x18(%rbp)
  xor    %eax,%eax
  mov    %rsp,%rax
  mov    %rax,%r12
  mov    D8(%rip),%rax
  mov    (%rax),%eax
  add    $0x1,%eax
  movslq %eax,%rdx
  sub    $0x1,%rdx
  mov    %rdx,-0x28(%rbp)
  movslq %eax,%rdx
  mov    %rdx,%rcx
  mov    $0x0,%ebx
  movslq %eax,%rbx
  movslq %eax,%rdx
  mov    %rdx,%r10
  mov    $0x0,%r11d
  movslq %eax,%rdx
  mov    %rdx,%r8
  mov    $0x0,%r9d
  cltq
  lea    (%rax,%rax,1),%rdx
  mov    $0x10,%eax
  sub    $0x1,%rax
  add    %rdx,%rax
  mov    $0x10,%esi
  mov    $0x0,%edx
  div    %rsi
  imul   $0x10,%rax,%rax
  mov    %rax,%rcx
  and    $0xfffffffffffff000,%rcx
  mov    %rsp,%rdx
  sub    %rcx,%rdx
L20:
  cmp    %rdx,%rsp
  je     L66
  sub    $0x1000,%rsp
  orq    $0x0,0xff8(%rsp)
  jmp    L20
L66:
  mov    %rax,%rdx
  and    $0xfff,%edx
  sub    %rdx,%rsp
  mov    %rax,%rdx
  and    $0xfff,%edx
  test   %rdx,%rdx
  je     L14
  and    $0xfff,%eax
  sub    $0x8,%rax
  add    %rsp,%rax
  orq    $0x0,(%rax)
L14:
  mov    %rsp,%rax
  add    $0x0,%rax
  mov    %rax,-0x20(%rbp)
  movl   $0x0,-0x34(%rbp)
  jmp    L40
L89:
  mov    -0x48(%rbp),%rax
  mov    %rax,%rdi
  call   <strlen@plt>
  sub    $0x1,%eax
  mov    %eax,-0x2c(%rbp)
  jmp    L11
L60:
  subl   $0x1,-0x2c(%rbp)
L11:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  cmp    $0x5f,%al
  jne    L60
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addl   $0x1,-0x2c(%rbp)
  movl   $0x0,-0x30(%rbp)
  jmp    L33
L8:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    -0x20(%rbp),%rsi
  mov    -0x30(%rbp),%edx
  movslq %edx,%rcx
  mov    -0x34(%rbp),%edx
  movslq %edx,%rdx
  imul   %rbx,%rdx
  add    %rsi,%rcx
  add    %rcx,%rdx
  mov    %al,(%rdx)
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addl   $0x1,-0x2c(%rbp)
  addl   $0x1,-0x30(%rbp)
L33:
  mov    -0x2c(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x48(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L8
  mov    -0x20(%rbp),%rcx
  mov    -0x30(%rbp),%eax
  movslq %eax,%rdx
  mov    -0x34(%rbp),%eax
  cltq
  imul   %rbx,%rax
  add    %rcx,%rdx
  add    %rdx,%rax
  movb   $0x0,(%rax)
  addl   $0x1,-0x34(%rbp)
L40:
  cmpl   $0x1,-0x34(%rbp)
  jle    L89
  mov    -0x20(%rbp),%rax
  mov    %rax,%rdi
  call   <atof@plt>
  movd   %xmm0,%eax
  mov    -0x58(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    -0x20(%rbp),%rax
  add    %rbx,%rax
  mov    %rax,%rdi
  call   <atof@plt>
  movd   %xmm0,%eax
  mov    -0x50(%rbp),%rdx
  mov    %eax,(%rdx)
  mov    %r12,%rsp
  nop
  mov    -0x18(%rbp),%rax
  sub    %fs:0x28,%rax
  je     L49
  call   <__stack_chk_fail@plt>
L49:
  lea    -0x10(%rbp),%rsp
  pop    %rbx
  pop    %r12
  pop    %rbp
  ret
```

assistant: ```c
void get_latlong(char fname[BUFSIZ + 1], float *lat, float *lon) {
  int i, j, delim;
  char latlong[2][BUFSIZ + 1];
  for (i = 0; i < 2; i++) {
    delim = strlen(fname) - 1;
    while (fname[delim] != '_')
      delim--;
    fname[delim] = '\0';
    delim++;
    j = 0;
    while (fname[delim] != '\0') {
      latlong[i][j] = fname[delim];
      fname[delim] = '\0';
      delim++;
      j++;
    }
    latlong[i][j] = '\0';
  }
  *lon = atof(latlong[0]);
  *lat = atof(latlong[1]);
}
```