user: 这段汇编代码用C语言表示是什么样的?

```asm
<MFRC522_ToCard>:
  endbr64
  push   %r15
  movsbl %dil,%r15d
  push   %r14
  mov    %rcx,%r14
  push   %r13
  mov    %edx,%r13d
  push   %r12
  mov    %edi,%r12d
  push   %rbp
  push   %rbx
  mov    %rsi,%rbx
  sub    $0x18,%rsp
  mov    %r8,0x8(%rsp)
  cmp    $0xc,%dil
  je     L84
  cmp    $0xe,%dil
  mov    $0x1,%eax
  mov    $0x11,%ebp
  mov    $0xffffff92,%esi
  cmovne %eax,%ebp
  mov    $0xffffff80,%eax
  mov    $0x12,%edx
  movsbl %r13b,%r13d
  cmovne %eax,%esi
  mov    $0x0,%eax
  mov    $0x2,%edi
  cmove  %edx,%eax
  mov    %al,0x7(%rsp)
  call   <MFRC522_Wr@plt>
  mov    $0x80,%esi
  mov    $0x4,%edi
  call   <MFRC522_Clear_Bit@plt>
  mov    $0x80,%esi
  mov    $0xa,%edi
  call   <MFRC522_Set_Bit@plt>
  xor    %esi,%esi
  mov    $0x1,%edi
  call   <MFRC522_Wr@plt>
  test   %r13d,%r13d
  je     L135
L26:
  lea    -0x1(%r13),%eax
  lea    0x1(%rbx,%rax,1),%r13
  nopw   0x0(%rax,%rax,1)
L184:
  movsbl (%rbx),%esi
  mov    $0x9,%edi
  add    $0x1,%rbx
  call   <MFRC522_Wr@plt>
  cmp    %rbx,%r13
  jne    L184
  mov    %r15d,%esi
  mov    $0x1,%edi
  call   <MFRC522_Wr@plt>
  cmp    $0xc,%r12b
  je     L139
L104:
  mov    $0x4,%edi
  mov    $0xfffe,%ebx
  call   <MFRC522_Rd@plt>
  mov    %eax,%r13d
  jmp    L57
  nopl   0x0(%rax)
L52:
  mov    $0x4,%edi
  call   <MFRC522_Rd@plt>
  mov    %eax,%r13d
  sub    $0x1,%ebx
  je     L152
L57:
  test   %bpl,%r13b
  je     L52
  mov    $0xd,%edi
  mov    $0x80,%esi
  call   <MFRC522_Clear_Bit@plt>
  mov    $0x6,%edi
  call   <MFRC522_Rd@plt>
  test   $0x1b,%al
  jne    L153
  and    0x7(%rsp),%r13b
  and    $0x1,%r13d
  cmp    $0xc,%r12b
  je     L74
L151:
  add    $0x18,%rsp
  mov    %r13d,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L84:
  mov    $0xfffffff7,%esi
  mov    $0x2,%edi
  movsbl %r13b,%r13d
  mov    $0x31,%ebp
  call   <MFRC522_Wr@plt>
  mov    $0x80,%esi
  mov    $0x4,%edi
  call   <MFRC522_Clear_Bit@plt>
  mov    $0x80,%esi
  mov    $0xa,%edi
  call   <MFRC522_Set_Bit@plt>
  xor    %esi,%esi
  mov    $0x1,%edi
  call   <MFRC522_Wr@plt>
  movb   $0x77,0x7(%rsp)
  test   %r13d,%r13d
  jne    L26
  mov    $0xc,%esi
  mov    $0x1,%edi
  call   <MFRC522_Wr@plt>
  nopl   0x0(%rax,%rax,1)
L139:
  mov    $0x80,%esi
  mov    $0xd,%edi
  call   <MFRC522_Set_Bit@plt>
  jmp    L104
  nopl   0x0(%rax)
L153:
  mov    $0x2,%r13d
  jmp    L151
L152:
  mov    $0x80,%esi
  mov    $0xd,%edi
  mov    $0x2,%r13d
  call   <MFRC522_Clear_Bit@plt>
  jmp    L151
L135:
  mov    %r15d,%esi
  mov    $0x1,%edi
  call   <MFRC522_Wr@plt>
  jmp    L104
L74:
  mov    $0xa,%edi
  call   <MFRC522_Rd@plt>
  mov    $0xc,%edi
  mov    %eax,%ebx
  call   <MFRC522_Rd@plt>
  and    $0x7,%eax
  jne    L197
  movsbl %bl,%eax
  shl    $0x3,%eax
L70:
  mov    0x8(%rsp),%rcx
  mov    %eax,(%rcx)
  test   %bl,%bl
  je     L19
  mov    $0x10,%eax
  cmp    %al,%bl
  cmovg  %eax,%ebx
  movsbl %bl,%ebp
  test   %ebp,%ebp
  je     L23
  xor    %ebx,%ebx
  xchg   %ax,%ax
L140:
  mov    $0x9,%edi
  call   <MFRC522_Rd@plt>
  mov    %al,(%r14,%rbx,1)
  add    $0x1,%rbx
  cmp    %ebx,%ebp
  ja     L140
L101:
  test   %ebp,%ebp
  mov    $0x1,%eax
  cmovne %rbp,%rax
  add    %rax,%r14
L23:
  movb   $0x0,(%r14)
  jmp    L151
L197:
  movsbl %bl,%edx
  movsbl %al,%eax
  lea    -0x8(%rax,%rdx,8),%eax
  jmp    L70
L19:
  mov    $0x9,%edi
  mov    $0x1,%ebp
  call   <MFRC522_Rd@plt>
  mov    %al,(%r14)
  jmp    L101
```

assistant: ```c
char MFRC522_ToCard(char command, char *sendData, char sendLen, char *backData, unsigned *backLen) {
  char _status = 2;
  char irqEn = 0x00;
  char waitIRq = 0x00;
  char lastBits;
  char n;
  unsigned i;
  switch (command) {
  case 0x0E: {
    irqEn = 0x12;
    waitIRq = 0x10;
    break;
  }
  case 0x0C: {
    irqEn = 0x77;
    waitIRq = 0x30;
    break;
  }
  default:
    break;
  }
  MFRC522_Wr(0x02, irqEn | 0x80);
  MFRC522_Clear_Bit(0x04, 0x80);
  MFRC522_Set_Bit(0x0A, 0x80);
  MFRC522_Wr(0x01, 0x00);
  for (i = 0; i < sendLen; i++) {
    MFRC522_Wr(0x09, sendData[i]);
  }
  MFRC522_Wr(0x01, command);
  if (command == 0x0C) {
    MFRC522_Set_Bit(0x0D, 0x80);
  }
  i = 0xFFFF;
  do {
    n = MFRC522_Rd(0x04);
    i--;
  } while (i && !(n & 0x01) && !(n & waitIRq));
  MFRC522_Clear_Bit(0x0D, 0x80);
  if (i != 0) {
    if (!(MFRC522_Rd(0x06) & 0x1B)) {
      _status = 0;
      if (n & irqEn & 0x01) {
        _status = 1;
      }
      if (command == 0x0C) {
        n = MFRC522_Rd(0x0A);
        lastBits = MFRC522_Rd(0x0C) & 0x07;
        if (lastBits) {
          *backLen = (n - 1) * 8 + lastBits;
        } else {
          *backLen = n * 8;
        }
        if (n == 0) {
          n = 1;
        }
        if (n > 16) {
          n = 16;
        }
        for (i = 0; i < n; i++) {
          backData[i] = MFRC522_Rd(0x09);
        }
        backData[i] = 0;
      }
    } else {
      _status = 2;
    }
  }
  return _status;
}
```