user: 请从给定的汇编指令推导出C源代码:

```asm
<tpenc16>:
  endbr64
  push   %r14
  push   %r13
  mov    %rdx,%r13
  push   %r12
  mov    %esi,%r12d
  push   %rbp
  mov    %rdi,%rbp
  mov    %esi,%edi
  and    $0xfffffff0,%esi
  push   %rbx
  lea    0x0(%rbp,%rsi,1),%rbx
  shr    $0x4,%edi
  cmp    %rbx,%rbp
  jae    L13
  lea    0x0(,%rdi,8),%r10
  lea    (%rdi,%rdi,4),%r9
  mov    %rbp,%rax
  mov    %r10,%r11
  lea    (%rdi,%rdi,2),%r8
  lea    (%rdx,%r9,1),%rcx
  add    %rdi,%r10
  add    %rdx,%r8
  sub    %rdi,%r11
  add    %r9,%r9
  nopl   0x0(%rax)
L132:
  movzbl (%rax),%r14d
  add    $0x10,%rax
  mov    %r14b,(%rdx)
  movzbl -0xf(%rax),%r14d
  mov    %r14b,(%rdx,%rdi,1)
  movzbl -0xe(%rax),%r14d
  mov    %r14b,(%rdx,%rdi,2)
  movzbl -0xd(%rax),%r14d
  mov    %r14b,(%r8)
  movzbl -0xc(%rax),%r14d
  mov    %r14b,(%r8,%rdi,1)
  movzbl -0xb(%rax),%r14d
  mov    %r14b,(%rcx)
  movzbl -0xa(%rax),%r14d
  mov    %r14b,(%rcx,%rdi,1)
  movzbl -0x9(%rax),%r14d
  mov    %r14b,(%rdx,%r11,1)
  movzbl -0x8(%rax),%r14d
  mov    %r14b,(%rdx,%rdi,8)
  movzbl -0x7(%rax),%r14d
  add    $0x1,%rdx
  mov    %r14b,-0x1(%rdx,%r10,1)
  movzbl -0x6(%rax),%r14d
  mov    %r14b,-0x1(%rdx,%r9,1)
  movzbl -0x5(%rax),%r14d
  mov    %r14b,(%r8,%rdi,8)
  movzbl -0x4(%rax),%r14d
  add    $0x1,%r8
  mov    %r14b,(%rcx,%r11,1)
  movzbl -0x3(%rax),%r14d
  mov    %r14b,(%rcx,%rdi,8)
  movzbl -0x2(%rax),%r14d
  add    $0x1,%rcx
  mov    %r14b,-0x1(%rcx,%r10,1)
  movzbl -0x1(%rax),%r14d
  mov    %r14b,-0x1(%rcx,%r9,1)
  cmp    %rax,%rbx
  ja     L132
  lea    0x0(%rbp,%rsi,1),%rdx
L36:
  add    %r13,%rsi
  add    %rbp,%r12
  mov    %rsi,%rdi
  cmp    %r12,%rdx
  jae    L68
  mov    %r12,%rcx
  lea    0x1(%rdx),%r9
  mov    %rsi,%r8
  sub    %rdx,%rcx
  sub    %r9,%r8
  lea    -0x1(%rcx),%rax
  cmp    $0xe,%r8
  jbe    L11
  cmp    $0x6,%rax
  jbe    L11
  cmp    $0xe,%rax
  jbe    L188
  mov    %rcx,%rdi
  xor    %eax,%eax
  and    $0xfffffffffffffff0,%rdi
  nopl   0x0(%rax,%rax,1)
L110:
  movdqu (%rdx,%rax,1),%xmm0
  movups %xmm0,(%rsi,%rax,1)
  add    $0x10,%rax
  cmp    %rax,%rdi
  jne    L110
  mov    %rcx,%r8
  and    $0xfffffffffffffff0,%r8
  lea    (%rsi,%r8,1),%rdi
  lea    (%rdx,%r8,1),%rax
  cmp    %r8,%rcx
  je     L68
  sub    %r8,%rcx
  lea    -0x1(%rcx),%r9
  cmp    $0x6,%r9
  jbe    L92
L177:
  mov    (%rdx,%r8,1),%rdx
  mov    %rdx,(%rsi,%r8,1)
  mov    %rcx,%rdx
  and    $0xfffffffffffffff8,%rdx
  add    %rdx,%rdi
  add    %rdx,%rax
  cmp    %rcx,%rdx
  je     L68
L92:
  movzbl (%rax),%edx
  mov    %dl,(%rdi)
  lea    0x1(%rax),%rdx
  cmp    %rdx,%r12
  jbe    L68
  movzbl 0x1(%rax),%edx
  mov    %dl,0x1(%rdi)
  lea    0x2(%rax),%rdx
  cmp    %rdx,%r12
  jbe    L68
  movzbl 0x2(%rax),%edx
  mov    %dl,0x2(%rdi)
  lea    0x3(%rax),%rdx
  cmp    %rdx,%r12
  jbe    L68
  movzbl 0x3(%rax),%edx
  mov    %dl,0x3(%rdi)
  lea    0x4(%rax),%rdx
  cmp    %rdx,%r12
  jbe    L68
  movzbl 0x4(%rax),%edx
  mov    %dl,0x4(%rdi)
  lea    0x5(%rax),%rdx
  cmp    %rdx,%r12
  jbe    L68
  movzbl 0x5(%rax),%edx
  mov    %dl,0x5(%rdi)
  lea    0x6(%rax),%rdx
  cmp    %rdx,%r12
  jbe    L68
  movzbl 0x6(%rax),%eax
  mov    %al,0x6(%rdi)
L68:
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopw   0x0(%rax,%rax,1)
L11:
  xor    %eax,%eax
  nopw   0x0(%rax,%rax,1)
L148:
  movzbl (%rdx,%rax,1),%edi
  mov    %dil,(%rsi,%rax,1)
  add    $0x1,%rax
  cmp    %rcx,%rax
  jne    L148
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  ret
  nopw   0x0(%rax,%rax,1)
L13:
  mov    %rbp,%rdx
  jmp    L36
L188:
  mov    %rdx,%rax
  xor    %r8d,%r8d
  jmp    L177
```

assistant: ```c
void tpenc16(unsigned char *in, unsigned n, unsigned char *out) {
  unsigned char *op, *ip, *e;
  unsigned stride = n / 16;
  e = in + (n & ~(16 - 1));
  for (ip = in, op = out; ip < e; op++, ip += 16) {
    unsigned char *p = op;
    p[0] = ip[0];
    *(p += stride) = ip[1];
    *(p += stride) = ip[2];
    *(p += stride) = ip[3];
    *(p += stride) = ip[4];
    *(p += stride) = ip[5];
    *(p += stride) = ip[6];
    *(p += stride) = ip[7];
    *(p += stride) = ip[8];
    *(p += stride) = ip[9];
    *(p += stride) = ip[10];
    *(p += stride) = ip[11];
    *(p += stride) = ip[12];
    *(p += stride) = ip[13];
    *(p += stride) = ip[14];
    *(p += stride) = ip[15];
  }
  for (op = out + stride * 16; ip < in + n;)
    *op++ = *ip++;
}
```