user: 请显示与下面列出的汇编代码相匹配的C语言实现:

```asm
<punycode_decode>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  mov    %rdi,%r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x48,%rsp
  mov    %rsi,0x20(%rsp)
  mov    %rdx,0x18(%rsp)
  mov    %rcx,0x8(%rsp)
  test   %rsi,%rsi
  je     L172
  mov    %rdi,%rax
  lea    (%rsi,%rdi,1),%rdx
  jmp    L100
  nopw   0x0(%rax,%rax,1)
L117:
  add    $0x1,%rax
  cmp    %rdx,%rax
  je     L172
L100:
  cmpb   $0x0,(%rax)
  jns    L117
  xor    %ebx,%ebx
  xor    %r15d,%r15d
L69:
  mov    0x8(%rsp),%rax
  mov    %rbx,(%rax)
  add    $0x48,%rsp
  mov    %r15,%rax
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
  nopl   (%rax)
L172:
  mov    0x20(%rsp),%rax
  lea    -0x1(%r13,%rax,1),%r8
  cmp    %r8,%r13
  jb     L58
  nopl   0x0(%rax,%rax,1)
L148:
  mov    0x8(%rsp),%rax
  sub    %r13,%r8
  mov    (%rax),%rbx
  cmp    %rbx,%r8
  cmovbe %r8,%rbx
  test   %rbx,%rbx
  je     L2
  mov    0x18(%rsp),%rdi
  lea    0x1(%r13),%rcx
  lea    -0x1(%rbx),%rax
  mov    %rdi,%rdx
  sub    %rcx,%rdx
  cmp    $0xe,%rdx
  jbe    L393
  cmp    $0x6,%rax
  jbe    L393
  mov    %rbx,%rdx
  cmp    $0xe,%rax
  jbe    L368
  and    $0xfffffffffffffff0,%rdx
  xor    %eax,%eax
  mov    %rdi,%rcx
  nopl   0x0(%rax,%rax,1)
L154:
  movdqu 0x0(%r13,%rax,1),%xmm0
  movups %xmm0,(%rcx,%rax,1)
  add    $0x10,%rax
  cmp    %rdx,%rax
  jne    L154
  mov    %rbx,%rax
  and    $0xfffffffffffffff0,%rax
  test   $0xf,%bl
  je     L2
  mov    %rbx,%rdx
  sub    %rax,%rdx
  lea    -0x1(%rdx),%rcx
  cmp    $0x6,%rcx
  jbe    L127
L93:
  mov    0x0(%r13,%rax,1),%rcx
  mov    0x18(%rsp),%rdi
  mov    %rcx,(%rdi,%rax,1)
  mov    %rdx,%rcx
  and    $0xfffffffffffffff8,%rcx
  add    %rcx,%rax
  cmp    %rcx,%rdx
  je     L2
L127:
  movzbl 0x0(%r13,%rax,1),%edx
  mov    0x18(%rsp),%rdi
  mov    %dl,(%rdi,%rax,1)
  lea    0x1(%rax),%rdx
  cmp    %rbx,%rdx
  jae    L2
  movzbl 0x1(%r13,%rax,1),%edx
  mov    %dl,0x1(%rdi,%rax,1)
  lea    0x2(%rax),%rdx
  cmp    %rbx,%rdx
  jae    L2
  movzbl 0x2(%r13,%rax,1),%edx
  mov    %dl,0x2(%rdi,%rax,1)
  lea    0x3(%rax),%rdx
  cmp    %rdx,%rbx
  jbe    L2
  movzbl 0x3(%r13,%rax,1),%edx
  mov    %dl,0x3(%rdi,%rax,1)
  lea    0x4(%rax),%rdx
  cmp    %rdx,%rbx
  jbe    L2
  movzbl 0x4(%r13,%rax,1),%edx
  mov    %dl,0x4(%rdi,%rax,1)
  lea    0x5(%rax),%rdx
  cmp    %rdx,%rbx
  jbe    L2
  movzbl 0x5(%r13,%rax,1),%edx
  mov    %dl,0x5(%rdi,%rax,1)
  lea    0x6(%rax),%rdx
  cmp    %rdx,%rbx
  jbe    L2
  movzbl 0x6(%r13,%rax,1),%edx
  mov    %dl,0x6(%rdi,%rax,1)
L2:
  cmp    $0x1,%r8
  sbb    $0xffffffffffffffff,%r8
  mov    %r8,%r15
  cmp    %r8,0x20(%rsp)
  jbe    L69
  movq   $0x0,0x28(%rsp)
  mov    $0x48,%ebp
  movq   $0x80,0x30(%rsp)
  mov    %r13,0x10(%rsp)
L122:
  mov    0x8(%rsp),%rax
  cmp    %rbx,(%rax)
  jbe    L69
  mov    0x28(%rsp),%r14
  mov    $0x1,%r13d
  mov    $0x24,%r12d
  mov    %r15,%rax
  mov    %r13,%rdi
  mov    %r12,%r15
  mov    %rax,%r12
  mov    %r14,%r13
  mov    %rdi,%r14
  jmp    L192
  nopw   0x0(%rax,%rax,1)
L111:
  mov    %rsi,%rax
  xor    %edx,%edx
  sub    %r13,%rax
  div    %r14
  cmp    %rcx,%rax
  jb     L254
  mov    %rcx,%rax
  imul   %r14,%rax
  add    %rax,%r13
  mov    $0x1,%eax
  cmp    %r15,%rbp
  jae    L261
  lea    0x1a(%rbp),%rdx
  mov    %r15,%rax
  sub    %rbp,%rax
  cmp    %r15,%rdx
  mov    $0x1a,%edx
  cmovbe %rdx,%rax
L261:
  cmp    %rcx,%rax
  ja     L85
  mov    $0x24,%ecx
  xor    %edx,%edx
  sub    %rax,%rcx
  mov    %rsi,%rax
  div    %rcx
  cmp    %r14,%rax
  jb     L254
  mov    0x8(%rsp),%rax
  imul   %rcx,%r14
  add    $0x24,%r15
  cmp    %rbx,(%rax)
  jbe    L85
L192:
  mov    0x10(%rsp),%rax
  add    $0x1,%r12
  movsbl -0x1(%rax,%r12,1),%edi
  call   <decode_digit@plt>
  mov    %rax,%rcx
  mov    D2(%rip),%rax
  mov    (%rax),%rsi
  cmp    %rcx,%rsi
  jne    L111
  mov    %r12,%r15
  jmp    L69
L51:
  sub    $0x1,%r8
  cmp    %r8,%r13
  je     L406
L58:
  cmpb   $0x2d,(%r8)
  jne    L51
  jmp    L148
  nopl   0x0(%rax,%rax,1)
L85:
  mov    0x28(%rsp),%rax
  lea    0x1(%rbx),%rcx
  xor    %edx,%edx
  mov    %r13,%rdi
  mov    %rcx,%rsi
  mov    %rcx,0x28(%rsp)
  mov    %r12,%r15
  test   %rax,%rax
  sete   %dl
  sub    %rax,%rdi
  call   <adapt_bias@plt>
  mov    0x28(%rsp),%rcx
  xor    %edx,%edx
  mov    D2(%rip),%rdi
  mov    %rax,%rbp
  mov    %r13,%rax
  div    %rcx
  mov    (%rdi),%rsi
  sub    0x30(%rsp),%rsi
  cmp    %rsi,%rax
  ja     L0
  add    %rax,0x30(%rsp)
  mov    0x18(%rsp),%rax
  lea    0x1(%rdx),%rdi
  sub    %rdx,%rbx
  mov    %rdi,0x28(%rsp)
  mov    0x30(%rsp),%r14
  lea    (%rax,%rdx,1),%r12
  add    %rdi,%rax
  mov    %rbx,%rdx
  mov    %rcx,0x38(%rsp)
  mov    %rax,%rdi
  mov    %r12,%rsi
  call   <memmove@plt>
  cmp    %r15,0x20(%rsp)
  mov    %r14b,(%r12)
  mov    0x38(%rsp),%rbx
  ja     L122
  jmp    L69
  nopl   (%rax)
L254:
  xor    %edi,%edi
  mov    %r12,%r15
  call   <assert@plt>
  jmp    L69
  nop
L406:
  xor    %ebx,%ebx
  xor    %r8d,%r8d
  jmp    L2
L393:
  mov    0x18(%rsp),%rcx
  xor    %eax,%eax
  nopl   0x0(%rax)
L381:
  movzbl 0x0(%r13,%rax,1),%edx
  mov    %dl,(%rcx,%rax,1)
  add    $0x1,%rax
  cmp    %rbx,%rax
  jne    L381
  jmp    L2
L368:
  xor    %eax,%eax
  jmp    L93
L0:
  xor    %edi,%edi
  call   <assert@plt>
  jmp    L69
```

assistant: ```c
size_t punycode_decode(const char *const src, const size_t srclen, uint32_t *const dst, size_t *const dstlen) {
  const char *p;
  size_t b, n, t;
  size_t i, k, w;
  size_t si, di;
  size_t digit;
  size_t org_i;
  size_t bias;
  for (si = 0; si < srclen; si++) {
    if (src[si] & 0x80) {
      *dstlen = 0;
      return 0;
    }
  }
  for (p = src + srclen - 1; p > src && *p != '-'; p--)
    ;
  b = p - src;
  di = ((b) < (*dstlen) ? (b) : (*dstlen));
  for (i = 0; i < di; i++) {
    dst[i] = src[i];
  }
  i = 0;
  n = 128;
  bias = 72;
  for (si = b + (b > 0); si < srclen && di < *dstlen; di++) {
    org_i = i;
    for (w = 1, k = 36; di < *dstlen; k += 36) {
      digit = decode_digit(src[si++]);
      if (digit == SIZE_MAX) {
        goto fail;
      }
      if (digit > (SIZE_MAX - i) / w) {
        assert(0 && "OVERFLOW");
        goto fail;
      }
      i += digit * w;
      if (k <= bias) {
        t = 1;
      } else if (k >= bias + 26) {
        t = 26;
      } else {
        t = k - bias;
      }
      if (digit < t) {
        break;
      }
      if (w > SIZE_MAX / (36 - t)) {
        assert(0 && "OVERFLOW");
        goto fail;
      }
      w *= 36 - t;
    }
    bias = adapt_bias(i - org_i, di + 1, org_i == 0);
    if (i / (di + 1) > SIZE_MAX - n) {
      assert(0 && "OVERFLOW");
      goto fail;
    }
    n += i / (di + 1);
    i %= (di + 1);
    memmove(dst + i + 1, dst + i, (di - i) * sizeof(uint32_t));
    dst[i++] = n;
  }
fail:
  *dstlen = di;
  return si;
}
```