user: 下面的汇编指令对应的C源代码是什么:

```asm
<expand_tokens>:
  endbr64
  xor    %ecx,%ecx
  xor    %eax,%eax
  jmp    L1
  nopw   0x0(%rax,%rax,1)
L91:
  cmp    $0x3c,%dl
  je     L73
  test   %rax,%rax
  je     L182
  cmpb   $0x7c,-0x1(%rdi,%rax,1)
  je     L182
  cmp    $0x7c,%dl
  je     L12
L20:
  cmp    $0x26,%dl
  je     L248
  cmp    $0x3e,%dl
  je     L135
L193:
  mov    %dl,(%r10)
  mov    %r8,%rax
  mov    %r9,%rcx
  movb   $0x0,(%r11)
L11:
  cmp    $0x3fe,%rax
  ja     L183
L1:
  movzbl (%rdi,%rax,1),%edx
  lea    (%rsi,%rcx,1),%r10
  test   %dl,%dl
  je     L207
  lea    0x1(%rcx),%r9
  lea    0x1(%rax),%r8
  lea    (%rsi,%r9,1),%r11
  cmp    $0x3b,%dl
  jne    L91
  mov    %r8,%rax
  movb   $0x20,(%r10)
  movb   $0x3b,(%r11)
  movb   $0x20,0x2(%rsi,%rcx,1)
  add    $0x3,%rcx
  cmp    $0x3fe,%rax
  jbe    L1
L183:
  ret
  nopl   0x0(%rax,%rax,1)
L182:
  cmp    $0x7c,%dl
  jne    L20
  cmpb   $0x7c,(%rdi,%r8,1)
  jne    L193
L90:
  movb   $0x20,(%r10)
  add    $0x2,%rax
  movb   $0x7c,(%r11)
  movb   $0x7c,0x2(%rsi,%rcx,1)
  movb   $0x20,0x3(%rsi,%rcx,1)
  add    $0x4,%rcx
  jmp    L11
L73:
  movb   $0x20,(%r10)
  mov    %r8,%rax
  movb   $0x3c,(%r11)
  movb   $0x20,0x2(%rsi,%rcx,1)
  add    $0x3,%rcx
  jmp    L11
  nopl   0x0(%rax)
L248:
  cmpb   $0x26,(%rdi,%r8,1)
  je     L71
  test   %rax,%rax
  je     L193
  cmpb   $0x26,-0x1(%rdi,%rax,1)
  je     L193
  cmpb   $0x26,(%rdi,%r8,1)
  je     L193
  movb   $0x20,(%r10)
  mov    %r8,%rax
  movb   $0x26,(%r11)
  movb   $0x20,0x2(%rsi,%rcx,1)
  add    $0x3,%rcx
  jmp    L11
  nopl   0x0(%rax,%rax,1)
L135:
  cmpb   $0x3e,(%rdi,%r8,1)
  je     L240
  test   %rax,%rax
  je     L193
  cmpb   $0x3e,-0x1(%rdi,%rax,1)
  je     L193
  movb   $0x20,(%r10)
  mov    %r8,%rax
  movb   $0x3e,(%r11)
  movb   $0x20,0x2(%rsi,%rcx,1)
  add    $0x3,%rcx
  jmp    L11
L207:
  movb   $0x0,(%r10)
  ret
  nopl   (%rax)
L12:
  cmpb   $0x7c,(%rdi,%r8,1)
  je     L90
  movb   $0x20,(%r10)
  mov    %r8,%rax
  movb   $0x7c,(%r11)
  movb   $0x20,0x2(%rsi,%rcx,1)
  add    $0x3,%rcx
  jmp    L11
  nopl   0x0(%rax)
L71:
  movb   $0x20,(%r10)
  add    $0x2,%rax
  movb   $0x26,(%r11)
  movb   $0x26,0x2(%rsi,%rcx,1)
  movb   $0x20,0x3(%rsi,%rcx,1)
  add    $0x4,%rcx
  jmp    L11
  nop
L240:
  movb   $0x20,(%r10)
  add    $0x2,%rax
  movb   $0x3e,(%r11)
  movb   $0x3e,0x2(%rsi,%rcx,1)
  movb   $0x20,0x3(%rsi,%rcx,1)
  add    $0x4,%rcx
  jmp    L11
```

assistant: ```c
void expand_tokens(char *s, char *output) {
  size_t len = 1024;
  size_t i = 0;
  size_t j = 0;
  while (i < len - 1) {
    if (i == len) {
      output[j] = '\0';
      return;
    }
    if (s[i] == '\0') {
      output[j] = s[i];
      return;
    }
    if (s[i] == ';') {
      output[j] = ' ';
      output[++j] = ';';
      output[++j] = ' ';
    } else if (s[i] == '<') {
      output[j] = ' ';
      output[++j] = '<';
      output[++j] = ' ';
    } else if (i != 0 && s[i - 1] != '|' && s[i] == '|' && s[i + 1] != '|') {
      output[j] = ' ';
      output[++j] = '|';
      output[++j] = ' ';
    } else if (s[i] == '|' && s[i + 1] == '|') {
      output[j] = ' ';
      output[++j] = '|';
      output[++j] = '|';
      output[++j] = ' ';
      ++i;
    } else if (s[i] == '&' && s[i + 1] == '&') {
      output[j] = ' ';
      output[++j] = '&';
      output[++j] = '&';
      output[++j] = ' ';
      ++i;
    } else if (i != 0 && s[i - 1] != '&' && s[i] == '&' && s[i + 1] != '&') {
      output[j] = ' ';
      output[++j] = '&';
      output[++j] = ' ';
    } else if (s[i] == '>' && s[i + 1] == '>') {
      output[j] = ' ';
      output[++j] = '>';
      output[++j] = '>';
      output[++j] = ' ';
      ++i;
    } else if (i != 0 && i != 0 && s[i - 1] != '>' && s[i] == '>' && s[i + 1] != '>') {
      output[j] = ' ';
      output[++j] = '>';
      output[++j] = ' ';
    } else {
      output[j] = s[i];
      output[j + 1] = '\0';
    }
    ++j;
    ++i;
  }
}
```