user: 请将以下的汇编代码转换成C语言代码:

```asm
<split>:
  endbr64
  push   %rbx
  mov    %rdi,%rax
  mov    %rsi,%r9
  mov    %edx,%r8d
  movzbl (%rcx),%esi
  test   %sil,%sil
  jne    L232
L380:
  lea    0x1(%rax),%rcx
  movzbl -0x1(%rcx),%edx
  cmp    $0x9,%dl
  je     L2
  cmp    $0x20,%dl
  je     L2
  mov    $0x0,%r10d
  cmpb   $0x0,(%rax)
  je     L185
  mov    $0x9,%edi
  mov    $0x1,%ebx
  mov    $0x20,%esi
L317:
  mov    %r8d,%r11d
  jmp    L145
L2:
  mov    %rcx,%rax
  jmp    L380
L232:
  mov    $0x0,%r10d
  cmpb   $0x0,(%rdi)
  je     L185
  movzbl 0x1(%rcx),%edi
  test   %dil,%dil
  jne    L40
  lea    0x8(%r9),%rdi
  mov    %rax,(%r9)
  mov    %edx,%ecx
  sub    $0x1,%ecx
  je     L450
L530:
  add    $0x1,%rax
  movzbl -0x1(%rax),%edx
  cmp    %dl,%sil
  je     L282
  test   %dl,%dl
  jne    L530
  sub    %ecx,%r8d
  mov    %r8d,%r10d
L185:
  mov    %r10d,%eax
  pop    %rbx
  ret
L282:
  movb   $0x0,-0x1(%rax)
  add    $0x8,%rdi
  mov    %rax,-0x8(%rdi)
  sub    $0x1,%ecx
  jne    L530
L450:
  mov    %r8d,%r10d
  jmp    L462
L30:
  add    $0x1,%r10d
L462:
  add    $0x1,%rax
  movzbl -0x1(%rax),%edx
  cmp    %dl,%sil
  je     L30
  test   %dl,%dl
  jne    L462
  jmp    L185
L40:
  cmpb   $0x0,0x2(%rcx)
  je     L519
  mov    $0x0,%r10d
L186:
  cmp    %r8d,%r10d
  jge    L325
  mov    %rax,(%r9)
  lea    0x8(%r9),%r9
L325:
  add    $0x1,%r10d
  jmp    L179
L519:
  mov    $0x0,%ebx
  jmp    L317
L54:
  test   %r11d,%r11d
  je     L226
  movb   $0x0,-0x1(%rcx)
  mov    %rcx,%rax
L217:
  lea    0x1(%rax),%rcx
  movzbl -0x1(%rcx),%edx
  cmp    %dl,%dil
  je     L231
  cmp    %dl,%sil
  je     L231
L145:
  add    $0x8,%r9
  mov    %rax,-0x8(%r9)
  mov    %r11d,%r10d
  sub    $0x1,%r11d
  mov    %rax,%rcx
L416:
  add    $0x1,%rcx
  movzbl -0x1(%rcx),%edx
  cmp    %dl,%sil
  je     L54
  cmp    %dl,%dil
  je     L54
  test   %dl,%dl
  jne    L416
  test   %ebx,%ebx
  je     L273
  cmpb   $0x0,(%rax)
  cmove  %r10d,%r11d
L273:
  sub    %r11d,%r8d
  mov    %r8d,%r10d
  jmp    L185
L226:
  mov    %r8d,%r10d
  test   %dl,%dl
  jne    L340
L206:
  test   %ebx,%ebx
  je     L185
  sub    $0x1,%rcx
L105:
  sub    $0x1,%rcx
  movzbl (%rcx),%eax
  cmp    %al,%dil
  je     L105
  cmp    %al,%sil
  je     L105
  cmpb   $0x0,0x1(%rcx)
  je     L185
  add    $0x1,%r8d
  cmp    %r10d,%r8d
  je     L178
L136:
  sub    $0x1,%r10d
  jmp    L185
L231:
  mov    %rcx,%rax
  jmp    L217
L479:
  mov    %rdx,%rcx
L340:
  lea    0x1(%rcx),%rdx
  movzbl -0x1(%rdx),%eax
  cmp    %al,%dil
  je     L479
  cmp    %al,%sil
  je     L479
  add    $0x1,%r10d
L500:
  add    $0x1,%rcx
  movzbl -0x1(%rcx),%eax
  test   %al,%al
  je     L206
  cmp    %al,%sil
  je     L340
  cmp    %al,%dil
  je     L340
  jmp    L500
L178:
  movb   $0x0,0x1(%rcx)
  jmp    L136
L431:
  test   %sil,%sil
  jne    L476
L179:
  add    $0x1,%rax
  movzbl -0x1(%rax),%edi
  test   %dil,%dil
  je     L185
  mov    %rcx,%rdx
L269:
  add    $0x1,%rdx
  movzbl -0x1(%rdx),%esi
  cmp    %sil,%dil
  je     L431
  test   %sil,%sil
  jne    L269
  jmp    L431
L476:
  cmp    %r10d,%r8d
  jle    L474
  movb   $0x0,-0x1(%rax)
L474:
  mov    %rax,%rdi
  jmp    L82
L25:
  test   %sil,%sil
  je     L186
L82:
  mov    %rdi,%rax
  add    $0x1,%rdi
  movzbl -0x1(%rdi),%r11d
  mov    %rcx,%rdx
L467:
  add    $0x1,%rdx
  movzbl -0x1(%rdx),%esi
  cmp    %sil,%r11b
  je     L25
  test   %sil,%sil
  jne    L467
  jmp    L25
```

assistant: ```c
int split(string, fields, nfields, sep)
char *string;
char *fields[];
int nfields;
char *sep;
{
  register char *p = string;
  register char c;
  register char sepc = sep[0];
  register char sepc2;
  register int fn;
  register char **fp = fields;
  register char *sepp;
  register int trimtrail;
  if (sepc == '\0') {
    while ((c = *p++) == ' ' || c == '\t')
      continue;
    p--;
    trimtrail = 1;
    sep = " \t";
    sepc = ' ';
  } else
    trimtrail = 0;
  sepc2 = sep[1];
  if (*p == '\0')
    return (0);
  if (sepc2 == '\0') {
    fn = nfields;
    for (;;) {
      *fp++ = p;
      fn--;
      if (fn == 0)
        break;
      while ((c = *p++) != sepc)
        if (c == '\0')
          return (nfields - fn);
      *(p - 1) = '\0';
    }
    fn = nfields;
    for (;;) {
      while ((c = *p++) != sepc)
        if (c == '\0')
          return (fn);
      fn++;
    }
  }
  if (sep[2] == '\0') {
    fn = nfields;
    for (;;) {
      *fp++ = p;
      fn--;
      while ((c = *p++) != sepc && c != sepc2)
        if (c == '\0') {
          if (trimtrail && **(fp - 1) == '\0')
            fn++;
          return (nfields - fn);
        }
      if (fn == 0)
        break;
      *(p - 1) = '\0';
      while ((c = *p++) == sepc || c == sepc2)
        continue;
      p--;
    }
    fn = nfields;
    while (c != '\0') {
      while ((c = *p++) == sepc || c == sepc2)
        continue;
      p--;
      fn++;
      while ((c = *p++) != '\0' && c != sepc && c != sepc2)
        continue;
    }
    if (trimtrail) {
      p--;
      while ((c = *--p) == sepc || c == sepc2)
        continue;
      p++;
      if (*p != '\0') {
        if (fn == nfields + 1)
          *p = '\0';
        fn--;
      }
    }
    return (fn);
  }
  fn = 0;
  for (;;) {
    if (fn < nfields)
      *fp++ = p;
    fn++;
    for (;;) {
      c = *p++;
      if (c == '\0')
        return (fn);
      sepp = sep;
      while ((sepc = *sepp++) != '\0' && sepc != c)
        continue;
      if (sepc != '\0')
        break;
    }
    if (fn < nfields)
      *(p - 1) = '\0';
    for (;;) {
      c = *p++;
      sepp = sep;
      while ((sepc = *sepp++) != '\0' && sepc != c)
        continue;
      if (sepc == '\0')
        break;
    }
    p--;
  }
}
```