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_set_speed>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x30,%rsp
  mov    %edi,-0x24(%rbp)
  mov    %esi,-0x28(%rbp)
  mov    %edx,%eax
  mov    %al,-0x2c(%rbp)
  cmpl   $0x2,-0x24(%rbp)
  je     L96
  cmpl   $0x2,-0x24(%rbp)
  ja     L140
  cmpl   $0x0,-0x24(%rbp)
  je     L162
  cmpl   $0x1,-0x24(%rbp)
  je     L25
  jmp    L140
L162:
  mov    $0x0,%eax
  call   <__startrek_read_R_speed@plt>
  mov    %al,-0x1a(%rbp)
  cmpb   $0x0,-0x1a(%rbp)
  je     L18
  mov    $0x0,%eax
  call   <__VERIFIER_nondet_U8@plt>
  mov    %al,-0x19(%rbp)
  mov    $0x0,%eax
  call   <__startrek_read_R_count@plt>
  mov    %eax,-0x4(%rbp)
  cmpb   $0x0,-0x1a(%rbp)
  jle    L61
  movzbl -0x19(%rbp),%eax
  mov    %eax,-0x18(%rbp)
  jmp    L142
L61:
  movzbl -0x19(%rbp),%eax
  neg    %eax
  mov    %eax,-0x18(%rbp)
L142:
  mov    -0x4(%rbp),%edx
  mov    -0x18(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%edi
  call   <__startrek_write_R_count@plt>
L18:
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <__startrek_write_R_speed@plt>
  jmp    L17
L25:
  mov    $0x0,%eax
  call   <__startrek_read_W_speed@plt>
  mov    %al,-0x1a(%rbp)
  cmpb   $0x0,-0x1a(%rbp)
  je     L84
  mov    $0x0,%eax
  call   <__VERIFIER_nondet_U8@plt>
  mov    %al,-0x19(%rbp)
  mov    $0x0,%eax
  call   <__startrek_read_W_count@plt>
  mov    %eax,-0x8(%rbp)
  cmpb   $0x0,-0x1a(%rbp)
  jle    L130
  movzbl -0x19(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  jmp    L19
L130:
  movzbl -0x19(%rbp),%eax
  neg    %eax
  mov    %eax,-0x14(%rbp)
L19:
  mov    -0x8(%rbp),%edx
  mov    -0x14(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%edi
  call   <__startrek_write_W_count@plt>
L84:
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <__startrek_write_W_speed@plt>
  jmp    L17
L96:
  mov    $0x0,%eax
  call   <__startrek_read_T_speed@plt>
  mov    %al,-0x1a(%rbp)
  cmpb   $0x0,-0x1a(%rbp)
  je     L42
  mov    $0x0,%eax
  call   <__VERIFIER_nondet_U8@plt>
  mov    %al,-0x19(%rbp)
  mov    $0x0,%eax
  call   <__startrek_read_T_count@plt>
  mov    %eax,-0xc(%rbp)
  cmpb   $0x0,-0x1a(%rbp)
  jle    L150
  movzbl -0x19(%rbp),%eax
  mov    %eax,-0x10(%rbp)
  jmp    L26
L150:
  movzbl -0x19(%rbp),%eax
  neg    %eax
  mov    %eax,-0x10(%rbp)
L26:
  mov    -0xc(%rbp),%edx
  mov    -0x10(%rbp),%eax
  add    %edx,%eax
  mov    %eax,%edi
  call   <__startrek_write_T_count@plt>
L42:
  mov    -0x28(%rbp),%eax
  mov    %eax,%edi
  call   <__startrek_write_T_speed@plt>
  jmp    L17
L140:
  nop
L17:
  leave
  ret
```

assistant: ```c
void nxt_motor_set_speed(unsigned int n, int speed, _Bool b) {
  unsigned char diff;
  char prev_speed;
  int tmp;
  int tmp___0;
  int tmp___1;
  int tmp___2;
  int tmp___3;
  int tmp___4;
  {
    switch (n) {
    case 0:
      prev_speed = __startrek_read_R_speed();
      if (prev_speed != 0) {
        diff = __VERIFIER_nondet_U8();
        tmp = __startrek_read_R_count();
        if (prev_speed > 0) {
          tmp___0 = diff;
        } else {
          tmp___0 = -((int)diff);
        }
        __startrek_write_R_count(tmp + tmp___0);
      }
      __startrek_write_R_speed(speed);
      return;
    case 1:
      prev_speed = __startrek_read_W_speed();
      if (prev_speed != 0) {
        diff = __VERIFIER_nondet_U8();
        tmp___1 = __startrek_read_W_count();
        if (prev_speed > 0) {
          tmp___2 = diff;
        } else {
          tmp___2 = -((int)diff);
        }
        __startrek_write_W_count(tmp___1 + tmp___2);
      }
      __startrek_write_W_speed(speed);
      return;
    case 2:
      prev_speed = __startrek_read_T_speed();
      if (prev_speed != 0) {
        diff = __VERIFIER_nondet_U8();
        tmp___3 = __startrek_read_T_count();
        if (prev_speed > 0) {
          tmp___4 = diff;
        } else {
          tmp___4 = -((int)diff);
        }
        __startrek_write_T_count(tmp___3 + tmp___4);
      }
      __startrek_write_T_speed(speed);
      return;
    }
    return;
  }
}
```