user: 请显示与下面列出的汇编代码相匹配的C语言实现：

```asm
<nxt_motor_get_count>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x20,%rsp
  mov    %edi,-0x14(%rbp)
  movl   $0x0,-0x4(%rbp)
  movb   $0x0,-0xd(%rbp)
  cmpl   $0x2,-0x14(%rbp)
  je     L17
  cmpl   $0x2,-0x14(%rbp)
  ja     L117
  cmpl   $0x0,-0x14(%rbp)
  je     L185
  cmpl   $0x1,-0x14(%rbp)
  je     L92
  jmp    L117
L185:
  mov    $0x0,%eax
  call   <__startrek_read_R_speed@plt>
  mov    %al,-0x9(%rbp)
  movzbl -0x9(%rbp),%eax
  mov    %al,-0xd(%rbp)
  mov    $0x0,%eax
  call   <__startrek_read_R_count@plt>
  mov    %eax,-0x4(%rbp)
  cmpb   $0x0,-0xd(%rbp)
  jne    L70
  mov    -0x4(%rbp),%eax
  jmp    L50
L70:
  mov    $0x0,%eax
  call   <__VERIFIER_nondet_U8@plt>
  mov    %al,-0xb(%rbp)
  movsbl -0xd(%rbp),%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  test   %eax,%eax
  jle    L137
  movzbl -0xb(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L106
L137:
  movzbl -0xb(%rbp),%eax
  neg    %eax
  mov    %eax,-0x8(%rbp)
L106:
  mov    -0x8(%rbp),%eax
  mov    %eax,%edi
  call   <__startrek_write_R_count@plt>
  jmp    L117
L92:
  mov    $0x0,%eax
  call   <__startrek_read_W_speed@plt>
  mov    %al,-0xa(%rbp)
  movzbl -0xa(%rbp),%eax
  mov    %al,-0xd(%rbp)
  mov    $0x0,%eax
  call   <__startrek_read_W_count@plt>
  mov    %eax,-0x4(%rbp)
  cmpb   $0x0,-0xd(%rbp)
  jne    L81
  mov    -0x4(%rbp),%eax
  jmp    L50
L81:
  mov    $0x0,%eax
  call   <__VERIFIER_nondet_U8@plt>
  mov    %al,-0xb(%rbp)
  movsbl -0xd(%rbp),%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  test   %eax,%eax
  jle    L142
  movzbl -0xb(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L99
L142:
  movzbl -0xb(%rbp),%eax
  neg    %eax
  mov    %eax,-0x8(%rbp)
L99:
  mov    -0x8(%rbp),%eax
  mov    %eax,%edi
  call   <__startrek_write_W_count@plt>
  jmp    L117
L17:
  mov    $0x0,%eax
  call   <__startrek_read_T_speed@plt>
  mov    %al,-0xc(%rbp)
  movzbl -0xc(%rbp),%eax
  mov    %al,-0xd(%rbp)
  mov    $0x0,%eax
  call   <__startrek_read_T_count@plt>
  mov    %eax,-0x4(%rbp)
  cmpb   $0x0,-0xd(%rbp)
  jne    L166
  mov    -0x4(%rbp),%eax
  jmp    L50
L166:
  mov    $0x0,%eax
  call   <__VERIFIER_nondet_U8@plt>
  mov    %al,-0xb(%rbp)
  movsbl -0xd(%rbp),%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  test   %eax,%eax
  jle    L119
  movzbl -0xb(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  jmp    L123
L119:
  movzbl -0xb(%rbp),%eax
  neg    %eax
  mov    %eax,-0x8(%rbp)
L123:
  mov    -0x8(%rbp),%eax
  mov    %eax,%edi
  call   <__startrek_write_T_count@plt>
  nop
L117:
  mov    -0x8(%rbp),%eax
L50:
  leave
  ret
```

assistant: ```c
int nxt_motor_get_count(unsigned int n) {
  unsigned char delta;
  int new_count;
  int count;
  char speed;
  char tmp;
  char tmp___0;
  char tmp___1;
  {
    count = 0;
    speed = 0;
    switch (n) {
    case 0:
      tmp = __startrek_read_R_speed();
      speed = tmp;
      count = __startrek_read_R_count();
      if ((int)speed == 0) {
        return (count);
      } else {
        delta = __VERIFIER_nondet_U8();
        if (count + (int)speed > 0) {
          new_count = delta;
        } else {
          new_count = -((int)delta);
        }
        __startrek_write_R_count(new_count);
      }
      break;
    case 1:
      tmp___0 = __startrek_read_W_speed();
      speed = tmp___0;
      count = __startrek_read_W_count();
      if ((int)speed == 0) {
        return (count);
      } else {
        delta = __VERIFIER_nondet_U8();
        if (count + (int)speed > 0) {
          new_count = delta;
        } else {
          new_count = -((int)delta);
        }
        __startrek_write_W_count(new_count);
      }
      break;
    case 2:
      tmp___1 = __startrek_read_T_speed();
      speed = tmp___1;
      count = __startrek_read_T_count();
      if ((int)speed == 0) {
        return (count);
      } else {
        delta = __VERIFIER_nondet_U8();
        if (count + (int)speed > 0) {
          new_count = delta;
        } else {
          new_count = -((int)delta);
        }
        __startrek_write_T_count(new_count);
      }
      break;
    default:;
    }
    return (new_count);
  }
}
```