user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<punycode_encode>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x38,%rsp
  mov    %rsi,%r13
  mov    %rdx,0x18(%rsp)
  mov    %rcx,0x8(%rsp)
  test   %rsi,%rsi
  je     L197
  mov    %rdi,%r14
  mov    $0x0,%r15d
  mov    $0x0,%ebx
  mov    0x18(%rsp),%rcx
  mov    0x8(%rsp),%rdx
  jmp    L195
L197:
  mov    %rsi,(%rsp)
  mov    %rsi,%rbx
  jmp    L14
L28:
  add    $0x1,%rbx
  cmp    %rbx,%r13
  je     L244
L195:
  cmp    %r15,(%rdx)
  jbe    L232
  mov    (%r14,%rbx,4),%eax
  cmp    $0x7f,%eax
  jg     L28
  mov    %al,(%rcx,%r15,1)
  lea    0x1(%r15),%r15
  jmp    L28
L232:
  mov    %r15,(%rsp)
  test   %r15,%r15
  je     L209
L242:
  cmp    %r13,%r15
  jae    L14
L209:
  lea    (%r14,%r13,4),%rax
  mov    %rax,0x28(%rsp)
  mov    %r15,%r10
  mov    $0x80,%r8d
  mov    $0x48,%edi
  mov    $0x0,%r9d
  mov    %r15,0x20(%rsp)
  jmp    L251
L22:
  mov    %r15,(%rsp)
  jmp    L242
L252:
  mov    %rax,%rsi
  sub    %r8,%rsi
  sub    %r9,%rax
  mov    %r10,%rcx
  add    $0x1,%rcx
  mov    $0x0,%edx
  div    %rcx
  mov    %r13,%rbx
  cmp    %rax,%rsi
  jbe    L14
L82:
  mov    $0x0,%edi
  call   <assert@plt>
  mov    %r13,%rbx
  jmp    L14
L149:
  je     L56
L220:
  add    $0x1,%rbx
  cmp    %rbx,%r13
  jbe    L85
L208:
  movslq (%r14,%rbx,4),%rdx
  cmp    %rbp,%rdx
  jae    L149
  add    $0x1,%r12
  jne    L220
  mov    $0x0,%edi
  call   <assert@plt>
L14:
  mov    0x8(%rsp),%rax
  mov    (%rsp),%rdi
  mov    %rdi,(%rax)
  mov    %rbx,%rax
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L56:
  mov    0x8(%rsp),%rax
  mov    (%rax),%rax
  mov    %rax,0x10(%rsp)
  mov    %rax,%rcx
  mov    (%rsp),%rax
  sub    %rax,%rcx
  mov    0x18(%rsp),%rdx
  add    %rax,%rdx
  mov    %r12,%rsi
  call   <encode_var_int@plt>
  add    %rax,(%rsp)
  cmp    %r15,0x20(%rsp)
  sete   %dl
  movzbl %dl,%edx
  add    $0x1,%r15
  mov    %r15,%rsi
  mov    %r12,%rdi
  call   <adapt_bias@plt>
  mov    %rax,%rdi
  mov    $0x0,%r12d
  jmp    L220
L85:
  mov    %r15,%r10
  lea    0x1(%rbp),%r8
  lea    0x1(%r12),%r9
  cmp    %r13,%r15
  jae    L14
L251:
  mov    0x8(%rsp),%rax
  mov    (%rsp),%rcx
  cmp    %rcx,(%rax)
  jbe    L14
  mov    D7(%rip),%rax
  mov    (%rax),%rax
  test   %r13,%r13
  je     L252
  mov    %r14,%rdx
  mov    %rax,%rbp
  mov    0x28(%rsp),%r15
L59:
  movslq (%rdx),%rcx
  cmp    %rcx,%rbp
  mov    %rcx,%rsi
  cmovbe %rbp,%rsi
  cmp    %r8,%rcx
  cmovae %rsi,%rbp
  add    $0x4,%rdx
  cmp    %r15,%rdx
  jne    L59
  mov    %rbp,%rcx
  sub    %r8,%rcx
  mov    %r10,%rsi
  add    $0x1,%rsi
  sub    %r9,%rax
  mov    $0x0,%edx
  div    %rsi
  cmp    %rax,%rcx
  ja     L82
  imul   %rcx,%rsi
  lea    (%rsi,%r9,1),%r12
  mov    $0x0,%ebx
  mov    %r10,%r15
  jmp    L208
L244:
  test   %r15,%r15
  je     L145
  mov    0x8(%rsp),%rax
  cmp    %r15,(%rax)
  jbe    L22
  lea    0x1(%r15),%rax
  mov    %rax,(%rsp)
  mov    0x18(%rsp),%rax
  movb   $0x2d,(%rax,%r15,1)
  jmp    L242
L145:
  mov    %r15,(%rsp)
  jmp    L209
```

assistant: ```c
size_t punycode_encode(const uint32_t *const src, const size_t srclen, char *const dst, size_t *const dstlen) {
  size_t b, h;
  size_t delta, bias;
  size_t m, n;
  size_t si, di;
  for (si = 0, di = 0; si < srclen && di < *dstlen; si++) {
    if (src[si] < 128) {
      dst[di++] = src[si];
    }
  }
  b = h = di;
  if (di > 0 && di < *dstlen) {
    dst[di++] = '-';
  }
  n = 128;
  bias = 72;
  delta = 0;
  for (; h < srclen && di < *dstlen; n++, delta++) {
    for (m = SIZE_MAX, si = 0; si < srclen; si++) {
      if (src[si] >= n && src[si] < m) {
        m = src[si];
      }
    }
    if ((m - n) > (SIZE_MAX - delta) / (h + 1)) {
      assert(0 && "OVERFLOW");
      goto fail;
    }
    delta += (m - n) * (h + 1);
    n = m;
    for (si = 0; si < srclen; si++) {
      if (src[si] < n) {
        if (++delta == 0) {
          assert(0 && "OVERFLOW");
          goto fail;
        }
      } else if (src[si] == n) {
        di += encode_var_int(bias, delta, &dst[di], *dstlen - di);
        bias = adapt_bias(delta, h + 1, h == b);
        delta = 0;
        h++;
      }
    }
  }
fail:
  *dstlen = di;
  return si;
}
```