user: 下面的汇编指令对应的C源代码是什么：

```asm
<fillcarray>:
  endbr64
  sub    $0x22,%edx
  cmp    $0x14,%edx
  ja     L200
  push   %r12
  push   %rbp
  push   %rbx
  mov    %rdi,%rbx
  mov    %esi,%ebp
  mov    %edx,%edx
  lea    D2(%rip),%rsi
  movslq (%rsi,%rdx,4),%rax
  add    %rsi,%rax
  notrack jmp *%rax
  mov    $0xff,%ecx
  jmp    L171
  mov    $0x55,%ecx
  jmp    L176
  mov    %ebp,%edx
  mov    $0x0,%eax
  test   %ebp,%ebp
  jle    L121
L48:
  mov    %al,(%rbx,%rax,1)
  add    $0x1,%rax
  cmp    %rdx,%rax
  jne    L48
  jmp    L121
  test   %ebp,%ebp
  jle    L121
  movb   $0xfe,(%rdi)
  mov    %rdi,%rdx
  lea    -0x1(%rbp),%eax
  add    %rax,%rbx
  mov    $0x2,%eax
  mov    $0x1,%esi
  jmp    L3
  test   %ebp,%ebp
  jle    L121
  movb   $0x1,(%rdi)
  mov    %rdi,%rdx
  lea    -0x1(%rbp),%ecx
  add    %rdi,%rcx
  mov    $0x2,%eax
  mov    $0x1,%esi
  jmp    L210
  mov    $0x0,%ecx
L176:
  movzbl %cl,%edx
  shl    $0x8,%ecx
  and    $0x300,%ecx
  or     %ecx,%edx
  test   %ebp,%ebp
  jle    L121
  mov    %rbx,%rax
  lea    -0x1(%rbp),%ecx
  lea    0x1(%rbx,%rcx,1),%rcx
L173:
  mov    %dl,(%rax)
  xor    $0x3ff,%edx
  add    $0x1,%rax
  cmp    %rax,%rcx
  jne    L173
  jmp    L121
L224:
  mov    %al,0x1(%rdx)
  add    %eax,%eax
  and    $0x3ff,%eax
  cmove  %esi,%eax
  add    $0x1,%rdx
L210:
  cmp    %rcx,%rdx
  jne    L224
  jmp    L121
L95:
  mov    %eax,%ecx
  not    %ecx
  mov    %cl,0x1(%rdx)
  add    %eax,%eax
  and    $0x3ff,%eax
  cmove  %esi,%eax
  add    $0x1,%rdx
L3:
  cmp    %rbx,%rdx
  jne    L95
  jmp    L121
  mov    %ecx,%edi
  mov    $0x0,%eax
  call   <srand@plt>
  test   %ebp,%ebp
  jle    L121
  mov    %rbx,%r12
  lea    -0x1(%rbp),%eax
  lea    0x1(%rbx,%rax,1),%rbx
L36:
  mov    $0x0,%eax
  call   <rand@plt>
  mov    %al,(%r12)
  add    $0x1,%r12
  cmp    %rbx,%r12
  jne    L36
  jmp    L121
  mov    $0x0,%ecx
  jmp    L171
  mov    $0x55,%ecx
L171:
  movzbl %cl,%edx
  shl    $0x8,%ecx
  and    $0x300,%ecx
  or     %ecx,%edx
  test   %ebp,%ebp
  jle    L121
  mov    %rbx,%rax
  lea    -0x1(%rbp),%ecx
  lea    0x1(%rbx,%rcx,1),%rcx
L44:
  mov    %dl,(%rax)
  add    $0x1,%rax
  cmp    %rcx,%rax
  jne    L44
L121:
  mov    $0x0,%eax
  pop    %rbx
  pop    %rbp
  pop    %r12
  ret
  mov    $0xaa,%ecx
  jmp    L171
L200:
  mov    $0x0,%eax
  ret
```

assistant: ```c
fillcarray(buf, length, mode, ucode) char buf[];
{
  register count;
  switch (mode) {
  default:
    return;
  case 0x22:
    ucode = 0x00;
  varloop:
    ucode = ucode & 0xff | ucode << 8 & 0x300;
    for (count = 0; count < length; ++count) {
      buf[count] = ucode;
      ucode ^= 0x3ff;
    }
    break;
  case 0x23:
    ucode = 0x55;
    goto varloop;
  case 0x24:
    goto varloop;
  case 0x25:
    ucode = 1;
    for (count = 0; count < length; ++count) {
      buf[count] = ucode;
      ucode = ucode << 1 & 0x3ff;
      if (!ucode)
        ucode = 1;
    }
    break;
  case 0x26:
    ucode = 1;
    for (count = 0; count < length; ++count) {
      buf[count] = ucode ^ 0x3ff;
      ucode = ucode << 1 & 0x3ff;
      if (!ucode)
        ucode = 1;
    }
    break;
  case 0x27:
    for (count = 0; count < length; ++count)
      buf[count] = count & 0xff | count << 8 & 0x300;
    break;
  case 0x28:
    srand(ucode);
    for (count = 0; count < length; ++count)
      buf[count] = rand() & 0x3ff;
    break;
  case 0x32:
    ucode = 0x00;
  fixloop:
    ucode = ucode & 0xff | ucode << 8 & 0x300;
    for (count = 0; count < length; ++count)
      buf[count] = ucode;
    break;
  case 0x33:
    ucode = 0xff;
    goto fixloop;
  case 0x34:
    ucode = 0x55;
    goto fixloop;
  case 0x35:
    ucode = 0xaa;
    goto fixloop;
  case 0x36:
    goto fixloop;
  }
}
```