user: 请将以下的汇编代码转换成C语言代码:

```asm
<hash>:
  endbr64
  movzbl (%rdi),%ecx
  mov    %rdi,%rdx
  cmp    $0x47,%cl
  je     L149
  jg     L668
  cmp    $0x41,%cl
  je     L288
  cmp    $0x43,%cl
  jne    L171
  mov    $0x1,%eax
  mov    $0x1,%esi
L141:
  movzbl 0x1(%rdx),%ecx
  cmp    $0x47,%cl
  je     L606
L450:
  jg     L260
  cmp    $0x41,%cl
  je     L24
  cmp    $0x43,%cl
  jne    L444
  or     $0x4,%rax
  mov    $0x1,%esi
  nopl   0x0(%rax,%rax,1)
L244:
  movzbl 0x2(%rdx),%ecx
  cmp    $0x47,%cl
  je     L583
L165:
  jg     L246
  cmp    $0x41,%cl
  je     L348
  cmp    $0x43,%cl
  jne    L372
  or     $0x10,%rax
  mov    $0x1,%esi
  cs nopw 0x0(%rax,%rax,1)
L211:
  movzbl 0x3(%rdx),%ecx
  cmp    $0x47,%cl
  je     L666
L264:
  jg     L581
  cmp    $0x41,%cl
  je     L396
  cmp    $0x43,%cl
  jne    L574
  or     $0x40,%rax
  mov    $0x1,%esi
  xchg   %ax,%ax
L453:
  movzbl 0x4(%rdx),%ecx
  cmp    $0x47,%cl
  je     L0
L186:
  jg     L18
  cmp    $0x41,%cl
  je     L548
  cmp    $0x43,%cl
  jne    L316
  or     $0x1,%ah
  mov    $0x1,%esi
  nopl   (%rax)
L418:
  movzbl 0x5(%rdx),%ecx
  cmp    $0x47,%cl
  je     L111
L332:
  jg     L459
  cmp    $0x41,%cl
  je     L474
  cmp    $0x43,%cl
  jne    L152
  or     $0x4,%ah
  mov    $0x1,%esi
  nopl   (%rax)
L338:
  movzbl 0x6(%rdx),%ecx
  cmp    $0x47,%cl
  je     L95
L319:
  jg     L595
  cmp    $0x41,%cl
  je     L312
  cmp    $0x43,%cl
  jne    L560
  or     $0x10,%ah
  mov    $0x1,%esi
  nopl   0x0(%rax)
L410:
  movzbl 0x7(%rdx),%ecx
  cmp    $0x47,%cl
  je     L178
L379:
  jg     L61
  cmp    $0x41,%cl
  je     L371
  cmp    $0x43,%cl
  jne    L188
  or     $0x40,%ah
  ret
  nopl   (%rax)
L595:
  cmp    $0x54,%cl
  jne    L560
  movzbl 0x7(%rdx),%ecx
  or     $0x30,%ah
  mov    $0x3,%esi
  cmp    $0x47,%cl
  jne    L379
L178:
  or     $0x80,%ah
  ret
  xchg   %ax,%ax
L61:
  cmp    $0x54,%cl
  jne    L188
  or     $0xc0,%ah
L371:
  ret
  nopl   (%rax)
L459:
  cmp    $0x54,%cl
  jne    L152
  movzbl 0x6(%rdx),%ecx
  or     $0xc,%ah
  mov    $0x3,%esi
  cmp    $0x47,%cl
  jne    L319
  xchg   %ax,%ax
L95:
  or     $0x20,%ah
  mov    $0x2,%esi
  jmp    L410
  nopl   (%rax)
L18:
  cmp    $0x54,%cl
  jne    L316
  movzbl 0x5(%rdx),%ecx
  or     $0x3,%ah
  mov    $0x3,%esi
  cmp    $0x47,%cl
  jne    L332
  xchg   %ax,%ax
L111:
  or     $0x8,%ah
  mov    $0x2,%esi
  jmp    L338
  nopl   (%rax)
L581:
  cmp    $0x54,%cl
  jne    L574
  movzbl 0x4(%rdx),%ecx
  or     $0xc0,%al
  mov    $0x3,%esi
  cmp    $0x47,%cl
  jne    L186
  nopl   (%rax)
L0:
  or     $0x2,%ah
  mov    $0x2,%esi
  jmp    L418
  nopl   (%rax)
L246:
  cmp    $0x54,%cl
  jne    L372
  movzbl 0x3(%rdx),%ecx
  or     $0x30,%rax
  mov    $0x3,%esi
  cmp    $0x47,%cl
  jne    L264
  nop
L666:
  or     $0x80,%al
  mov    $0x2,%esi
  jmp    L453
  nopl   0x0(%rax)
L260:
  cmp    $0x54,%cl
  jne    L444
  movzbl 0x2(%rdx),%ecx
  or     $0xc,%rax
  mov    $0x3,%esi
  cmp    $0x47,%cl
  jne    L165
  nop
L583:
  or     $0x20,%rax
  mov    $0x2,%esi
  jmp    L211
  xchg   %ax,%ax
L668:
  mov    $0x3,%eax
  mov    $0x3,%esi
  cmp    $0x54,%cl
  je     L141
L171:
  movzbl 0x1(%rdx),%ecx
  mov    %esi,%eax
  cmp    $0x47,%cl
  jne    L450
  nopw   0x0(%rax,%rax,1)
L606:
  or     $0x8,%rax
  mov    $0x2,%esi
  jmp    L244
  cs nopw 0x0(%rax,%rax,1)
L288:
  xor    %eax,%eax
  xor    %esi,%esi
  jmp    L141
  nopl   0x0(%rax)
L312:
  xor    %esi,%esi
  jmp    L410
  nopw   0x0(%rax,%rax,1)
L474:
  xor    %esi,%esi
  jmp    L338
  nopw   0x0(%rax,%rax,1)
L548:
  xor    %esi,%esi
  jmp    L418
  nopw   0x0(%rax,%rax,1)
L396:
  xor    %esi,%esi
  jmp    L453
  nopw   0x0(%rax,%rax,1)
L348:
  xor    %esi,%esi
  jmp    L211
  nopw   0x0(%rax,%rax,1)
L24:
  xor    %esi,%esi
  jmp    L244
  nopw   0x0(%rax,%rax,1)
L444:
  lea    0x0(,%rsi,4),%ecx
  or     %rcx,%rax
  jmp    L244
  nop
L372:
  mov    %esi,%ecx
  shl    $0x4,%ecx
  or     %rcx,%rax
  jmp    L211
  nopl   (%rax)
L152:
  mov    %esi,%ecx
  shl    $0xa,%ecx
  or     %rcx,%rax
  jmp    L338
  nopl   (%rax)
L316:
  mov    %esi,%ecx
  shl    $0x8,%ecx
  or     %rcx,%rax
  jmp    L418
  nopl   (%rax)
L574:
  mov    %esi,%ecx
  shl    $0x6,%ecx
  or     %rcx,%rax
  jmp    L453
  nopl   (%rax)
L149:
  mov    $0x2,%eax
  mov    $0x2,%esi
  jmp    L141
  nop
L560:
  mov    %esi,%ecx
  shl    $0xc,%ecx
  or     %rcx,%rax
  jmp    L410
  nopl   (%rax)
L188:
  mov    %esi,%edx
  shl    $0xe,%edx
  or     %rdx,%rax
  ret
```

assistant: ```c
unsigned long hash(char *kmer) {
  unsigned int i, code;
  unsigned long result = 0;
  for (i = 0; i < 8; i++) {
    switch (kmer[i]) {
    case 'A':
      code = 0;
      break;
    case 'C':
      code = 1;
      break;
    case 'G':
      code = 2;
      break;
    case 'T':
      code = 3;
      break;
    }
    result |= code << i * 2;
  }
  return result;
}
```