user: Demonstrate the C code that generates the assembly output below:

```asm
<yaffs_ecc_correct>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rdi,-0x28(%rbp)
  mov    %rsi,-0x30(%rbp)
  mov    %rdx,-0x38(%rbp)
  mov    -0x30(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%eax
  xor    %edx,%eax
  mov    %al,-0x1b(%rbp)
  mov    -0x30(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%edx
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  xor    %edx,%eax
  mov    %al,-0x1a(%rbp)
  mov    -0x30(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%edx
  mov    -0x38(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  xor    %edx,%eax
  mov    %al,-0x19(%rbp)
  movzbl -0x1b(%rbp),%eax
  or     -0x1a(%rbp),%al
  or     -0x19(%rbp),%al
  test   %al,%al
  jne    L38
  mov    $0x0,%eax
  jmp    L75
L38:
  movzbl -0x1b(%rbp),%eax
  shr    %al
  xor    -0x1b(%rbp),%al
  movzbl %al,%eax
  and    $0x55,%eax
  cmp    $0x55,%eax
  jne    L36
  movzbl -0x1a(%rbp),%eax
  shr    %al
  xor    -0x1a(%rbp),%al
  movzbl %al,%eax
  and    $0x55,%eax
  cmp    $0x55,%eax
  jne    L36
  movzbl -0x19(%rbp),%eax
  shr    %al
  xor    -0x19(%rbp),%al
  movzbl %al,%eax
  and    $0x54,%eax
  cmp    $0x54,%eax
  jne    L36
  movl   $0x0,-0x18(%rbp)
  mov    -0x18(%rbp),%eax
  mov    %eax,-0x14(%rbp)
  movzbl -0x1a(%rbp),%eax
  test   %al,%al
  jns    L171
  orl    $0x80,-0x18(%rbp)
L171:
  movzbl -0x1a(%rbp),%eax
  and    $0x20,%eax
  test   %eax,%eax
  je     L96
  orl    $0x40,-0x18(%rbp)
L96:
  movzbl -0x1a(%rbp),%eax
  and    $0x8,%eax
  test   %eax,%eax
  je     L89
  orl    $0x20,-0x18(%rbp)
L89:
  movzbl -0x1a(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L101
  orl    $0x10,-0x18(%rbp)
L101:
  movzbl -0x1b(%rbp),%eax
  test   %al,%al
  jns    L81
  orl    $0x8,-0x18(%rbp)
L81:
  movzbl -0x1b(%rbp),%eax
  and    $0x20,%eax
  test   %eax,%eax
  je     L152
  orl    $0x4,-0x18(%rbp)
L152:
  movzbl -0x1b(%rbp),%eax
  and    $0x8,%eax
  test   %eax,%eax
  je     L42
  orl    $0x2,-0x18(%rbp)
L42:
  movzbl -0x1b(%rbp),%eax
  and    $0x2,%eax
  test   %eax,%eax
  je     L61
  orl    $0x1,-0x18(%rbp)
L61:
  movzbl -0x19(%rbp),%eax
  test   %al,%al
  jns    L20
  orl    $0x4,-0x14(%rbp)
L20:
  movzbl -0x19(%rbp),%eax
  and    $0x20,%eax
  test   %eax,%eax
  je     L71
  orl    $0x2,-0x14(%rbp)
L71:
  movzbl -0x19(%rbp),%eax
  and    $0x8,%eax
  test   %eax,%eax
  je     L182
  orl    $0x1,-0x14(%rbp)
L182:
  mov    -0x18(%rbp),%edx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  mov    %eax,%esi
  mov    -0x14(%rbp),%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  xor    %eax,%esi
  mov    %esi,%ecx
  mov    -0x18(%rbp),%edx
  mov    -0x28(%rbp),%rax
  add    %rdx,%rax
  mov    %ecx,%edx
  mov    %dl,(%rax)
  mov    $0x1,%eax
  jmp    L75
L36:
  movzbl -0x1b(%rbp),%eax
  mov    %eax,%edi
  call   <yaffs_hweight8@plt>
  mov    %eax,%ebx
  movzbl -0x1a(%rbp),%eax
  mov    %eax,%edi
  call   <yaffs_hweight8@plt>
  add    %eax,%ebx
  movzbl -0x19(%rbp),%eax
  mov    %eax,%edi
  call   <yaffs_hweight8@plt>
  add    %ebx,%eax
  cmp    $0x1,%eax
  jne    L3
  mov    -0x38(%rbp),%rax
  movzbl (%rax),%edx
  mov    -0x30(%rbp),%rax
  mov    %dl,(%rax)
  mov    -0x38(%rbp),%rax
  add    $0x1,%rax
  mov    -0x30(%rbp),%rdx
  add    $0x1,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  mov    -0x38(%rbp),%rax
  add    $0x2,%rax
  mov    -0x30(%rbp),%rdx
  add    $0x2,%rdx
  movzbl (%rax),%eax
  mov    %al,(%rdx)
  mov    $0x1,%eax
  jmp    L75
L3:
  mov    $0xffffffff,%eax
L75:
  mov    -0x8(%rbp),%rbx
  leave
  ret
```

assistant: ```c
int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, const unsigned char *test_ecc) {
  unsigned char d0, d1, d2;
  d0 = read_ecc[0] ^ test_ecc[0];
  d1 = read_ecc[1] ^ test_ecc[1];
  d2 = read_ecc[2] ^ test_ecc[2];
  if ((d0 | d1 | d2) == 0)
    return 0;
  if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 && ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 && ((d2 ^ (d2 >> 1)) & 0x54) == 0x54) {
    unsigned byte;
    unsigned bit;
    bit = byte = 0;
    if (d1 & 0x80)
      byte |= 0x80;
    if (d1 & 0x20)
      byte |= 0x40;
    if (d1 & 0x08)
      byte |= 0x20;
    if (d1 & 0x02)
      byte |= 0x10;
    if (d0 & 0x80)
      byte |= 0x08;
    if (d0 & 0x20)
      byte |= 0x04;
    if (d0 & 0x08)
      byte |= 0x02;
    if (d0 & 0x02)
      byte |= 0x01;
    if (d2 & 0x80)
      bit |= 0x04;
    if (d2 & 0x20)
      bit |= 0x02;
    if (d2 & 0x08)
      bit |= 0x01;
    data[byte] ^= (1 << bit);
    return 1;
  }
  if ((yaffs_hweight8(d0) + yaffs_hweight8(d1) + yaffs_hweight8(d2)) == 1) {
    read_ecc[0] = test_ecc[0];
    read_ecc[1] = test_ecc[1];
    read_ecc[2] = test_ecc[2];
    return 1;
  }
  return -1;
}
```