user: 这段汇编代码用C语言表示是什么样的：

```asm
<channel_encode>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  add    $0xffffffffffffff80,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %rsi,-0x60(%rbp)
  mov    %rdx,-0x68(%rbp)
  mov    %ecx,-0x6c(%rbp)
  mov    %r8,-0x78(%rbp)
  mov    -0x68(%rbp),%rax
  sub    $0x10,%rax
  shr    $0x3,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x68(%rbp),%rax
  and    $0x7,%eax
  mov    %rax,-0x8(%rbp)
  movq   $0xffff,-0x38(%rbp)
  movq   $0x0,-0x30(%rbp)
  jmp    L258
L58:
  mov    -0x30(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <crc_xmodem_update@plt>
  mov    %rax,-0x38(%rbp)
  addq   $0x1,-0x30(%rbp)
L258:
  mov    -0x30(%rbp),%rax
  cmp    -0x40(%rbp),%rax
  jb     L58
  movq   $0x0,-0x28(%rbp)
  movq   $0x0,-0x30(%rbp)
  jmp    L184
L51:
  mov    -0x28(%rbp),%rax
  shr    %rax
  or     $0x80,%al
  mov    %rax,-0x28(%rbp)
  addq   $0x1,-0x30(%rbp)
L184:
  mov    -0x30(%rbp),%rax
  cmp    -0x8(%rbp),%rax
  jb     L51
  cmpq   $0x0,-0x28(%rbp)
  je     L268
  mov    -0x40(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  and    -0x28(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <crc_xmodem_update@plt>
  mov    %rax,-0x38(%rbp)
L268:
  mov    -0x8(%rbp),%rax
  mov    %eax,%edx
  mov    $0x7,%eax
  sub    %edx,%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%edx
  mov    %edx,%eax
  cltq
  mov    %rax,-0x28(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  mov    %rax,-0x20(%rbp)
  mov    -0x40(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movq   $0x0,(%rax)
  mov    -0x40(%rbp),%rax
  add    $0x1,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x58(%rbp),%rax
  add    %rdx,%rax
  movq   $0x0,(%rax)
  movq   $0x0,-0x30(%rbp)
  jmp    L50
L202:
  mov    -0x38(%rbp),%rax
  and    $0x8000,%eax
  test   %rax,%rax
  je     L161
  mov    -0x20(%rbp),%rax
  mov    (%rax),%rax
  or     -0x28(%rbp),%rax
  mov    %rax,%rdx
  mov    -0x20(%rbp),%rax
  mov    %rdx,(%rax)
L161:
  shlq   -0x38(%rbp)
  shrq   -0x28(%rbp)
  cmpq   $0x0,-0x28(%rbp)
  jne    L135
  movq   $0x80,-0x28(%rbp)
  addq   $0x8,-0x20(%rbp)
L135:
  addq   $0x1,-0x30(%rbp)
L50:
  cmpq   $0xf,-0x30(%rbp)
  jbe    L202
  movq   $0x0,-0x30(%rbp)
  jmp    L93
L149:
  mov    -0x30(%rbp),%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x60(%rbp),%rax
  add    %rdx,%rax
  movq   $0x55,(%rax)
  addq   $0x1,-0x30(%rbp)
L93:
  cmpq   $0x3,-0x30(%rbp)
  jbe    L149
  movl   $0x9a52e716,-0x44(%rbp)
  movq   $0x7,-0x30(%rbp)
  jmp    L317
L261:
  mov    -0x44(%rbp),%eax
  cltq
  mov    -0x30(%rbp),%rdx
  lea    0x0(,%rdx,8),%rcx
  mov    -0x60(%rbp),%rdx
  add    %rcx,%rdx
  movzbl %al,%eax
  mov    %rax,(%rdx)
  sarl   $0x8,-0x44(%rbp)
  subq   $0x1,-0x30(%rbp)
L317:
  cmpq   $0x3,-0x30(%rbp)
  ja     L261
  mov    -0x6c(%rbp),%eax
  sar    $0x11,%eax
  cltq
  and    $0xfc,%eax
  mov    %rax,%rdx
  mov    -0x78(%rbp),%rax
  and    $0x3,%eax
  or     %rdx,%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x18(%rbp),%rax
  shl    $0x4,%rax
  and    $0xf00,%eax
  or     %rax,-0x18(%rbp)
  andq   $0xf0f,-0x18(%rbp)
  movq   $0x0,-0x30(%rbp)
  jmp    L168
L7:
  mov    -0x30(%rbp),%rax
  add    $0x1,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%esi
  mov    -0x30(%rbp),%rax
  add    $0x2,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  xor    %eax,%esi
  mov    -0x30(%rbp),%rax
  add    $0x3,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  cmp    %eax,%esi
  je     L216
  mov    -0x30(%rbp),%rax
  add    $0x4,%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rax
  or     %rax,-0x18(%rbp)
L216:
  mov    -0x30(%rbp),%rax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%ecx
  shr    %cl,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%esi
  mov    -0x30(%rbp),%rax
  add    $0x2,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  xor    %eax,%esi
  mov    -0x30(%rbp),%rax
  add    $0x3,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  cmp    %eax,%esi
  je     L159
  mov    -0x30(%rbp),%rax
  add    $0x5,%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rax
  or     %rax,-0x18(%rbp)
L159:
  mov    -0x30(%rbp),%rax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%ecx
  shr    %cl,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%esi
  mov    -0x30(%rbp),%rax
  add    $0x1,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  xor    %eax,%esi
  mov    -0x30(%rbp),%rax
  add    $0x3,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  cmp    %eax,%esi
  je     L144
  mov    -0x30(%rbp),%rax
  add    $0x6,%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rax
  or     %rax,-0x18(%rbp)
L144:
  mov    -0x30(%rbp),%rax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%ecx
  shr    %cl,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%esi
  mov    -0x30(%rbp),%rax
  add    $0x1,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  xor    %eax,%esi
  mov    -0x30(%rbp),%rax
  add    $0x2,%eax
  mov    -0x18(%rbp),%rdx
  mov    %eax,%ecx
  shr    %cl,%rdx
  mov    %rdx,%rax
  and    $0x1,%eax
  test   %rax,%rax
  setne  %al
  movzbl %al,%eax
  cmp    %eax,%esi
  je     L266
  mov    -0x30(%rbp),%rax
  add    $0x7,%eax
  mov    $0x1,%edx
  mov    %eax,%ecx
  shl    %cl,%rdx
  mov    %rdx,%rax
  or     %rax,-0x18(%rbp)
L266:
  addq   $0x8,-0x30(%rbp)
L168:
  cmpq   $0x7,-0x30(%rbp)
  jbe    L7
  movq   $0x0,-0x10(%rbp)
  movq   $0x80,-0x28(%rbp)
  movq   $0x0,-0x30(%rbp)
  jmp    L228
L27:
  mov    -0x10(%rbp),%rax
  mov    %eax,%edx
  mov    -0x18(%rbp),%rax
  mov    %edx,%ecx
  shr    %cl,%rax
  and    $0x1,%eax
  test   %rax,%rax
  je     L203
  mov    -0x30(%rbp),%rax
  shr    $0x3,%rax
  add    $0x8,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x60(%rbp),%rax
  add    %rdx,%rax
  mov    (%rax),%rax
  mov    -0x30(%rbp),%rdx
  shr    $0x3,%rdx
  add    $0x8,%rdx
  lea    0x0(,%rdx,8),%rcx
  mov    -0x60(%rbp),%rdx
  add    %rcx,%rdx
  or     -0x28(%rbp),%rax
  mov    %rax,(%rdx)
L203:
  shrq   -0x28(%rbp)
  cmpq   $0x0,-0x28(%rbp)
  jne    L169
  movq   $0x80,-0x28(%rbp)
L169:
  addq   $0x8,-0x10(%rbp)
  cmpq   $0xf,-0x10(%rbp)
  jbe    L247
  subq   $0x10,-0x10(%rbp)
  addq   $0x1,-0x10(%rbp)
  cmpq   $0x7,-0x10(%rbp)
  jbe    L247
  subq   $0x8,-0x10(%rbp)
L247:
  addq   $0x1,-0x30(%rbp)
L228:
  cmpq   $0xf,-0x30(%rbp)
  jbe    L27
  mov    -0x68(%rbp),%rax
  add    $0x4,%rax
  shr    $0x3,%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x68(%rbp),%rax
  add    $0x4,%rax
  and    $0x7,%eax
  mov    %rax,-0x8(%rbp)
  cmpq   $0x0,-0x8(%rbp)
  je     L94
  addq   $0x1,-0x40(%rbp)
L94:
  mov    -0x40(%rbp),%rax
  add    $0xb,%rax
  lea    0x0(,%rax,8),%rdx
  mov    -0x60(%rbp),%rax
  lea    (%rdx,%rax,1),%rdi
  mov    -0x60(%rbp),%rax
  lea    0x50(%rax),%rsi
  mov    -0x6c(%rbp),%ecx
  mov    -0x68(%rbp),%rdx
  mov    -0x58(%rbp),%rax
  mov    %ecx,%r8d
  mov    %rdx,%rcx
  mov    %rdi,%rdx
  mov    %rax,%rdi
  call   <encode_turbo@plt>
  mov    -0x40(%rbp),%rax
  add    $0xb,%rax
  shl    $0x3,%rax
  mov    %rax,-0x18(%rbp)
  cmpq   $0x0,-0x78(%rbp)
  jne    L145
  mov    -0x68(%rbp),%rax
  add    $0x4,%rax
  shr    $0x2,%rax
  add    %rax,-0x18(%rbp)
  jmp    L60
L145:
  cmpq   $0x1,-0x78(%rbp)
  jne    L21
  mov    -0x68(%rbp),%rdx
  mov    %rdx,%rax
  shl    $0x3,%rax
  sub    %rdx,%rax
  add    $0x1c,%rax
  movabs $0x4ec4ec4ec4ec4ec5,%rdx
  mul    %rdx
  mov    %rdx,%rax
  shr    $0x2,%rax
  add    %rax,-0x18(%rbp)
  jmp    L60
L21:
  cmpq   $0x2,-0x78(%rbp)
  jne    L114
  mov    -0x68(%rbp),%rdx
  mov    -0x18(%rbp),%rax
  add    %rdx,%rax
  add    $0x4,%rax
  mov    %rax,-0x18(%rbp)
  jmp    L60
L114:
  mov    -0x68(%rbp),%rax
  add    $0x4,%rax
  add    %rax,%rax
  add    %rax,-0x18(%rbp)
L60:
  mov    -0x18(%rbp),%rax
  leave
  ret
```

assistant: ```c
uint16_t channel_encode(uint8_t *input, uint8_t *output, uint16_t interleaver_len, uint32_t int_coeff, uint8_t rate) {
  uint16_t full_bytes = (interleaver_len - 16) >> 3;
  uint8_t remaining_bits = (interleaver_len - 16) & 0x7;
  uint16_t crc = 0xFFFF;
  uint8_t i;
  for (i = 0; i < full_bytes; i++)
    crc = crc_xmodem_update(crc, input[i]);
  uint8_t mask = 0;
  for (i = 0; i < remaining_bits; i++)
    mask = (mask >> 1) | 0x80;
  if (mask > 0)
    crc = crc_xmodem_update(crc, mask & input[full_bytes]);
  mask = 1 << (7 - remaining_bits);
  uint8_t *ptr = &input[full_bytes];
  input[full_bytes] = 0;
  input[full_bytes + 1] = 0;
  for (i = 0; i < 16; i++) {
    if (crc & 0x8000)
      *ptr |= mask;
    crc <<= 1;
    mask >>= 1;
    if (mask == 0) {
      mask = 0x80;
      ptr++;
    }
  }
  for (i = 0; i < 4; i++)
    output[i] = 0x55;
  uint32_t sync = 0x9A52E716;
  for (i = 4 + 4 - 1; i >= 4; i--) {
    output[i] = sync & 0xFF;
    sync >>= 8;
  }
  uint16_t size_f = ((int_coeff >> 17) & 0xFC) | (uint16_t)(rate & 0x3);
  size_f |= (size_f << 4) & 0xF00;
  size_f &= 0xF0F;
  for (i = 0; i < 2 * 4; i += 8) {
    if (((size_f & ((uint16_t)1 << (i + 1))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 2))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 3))) > 0))
      size_f |= ((uint16_t)1 << (i + 4));
    if (((size_f & ((uint16_t)1 << (i + 0))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 2))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 3))) > 0))
      size_f |= ((uint16_t)1 << (i + 5));
    if (((size_f & ((uint16_t)1 << (i + 0))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 1))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 3))) > 0))
      size_f |= ((uint16_t)1 << (i + 6));
    if (((size_f & ((uint16_t)1 << (i + 0))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 1))) > 0) ^ ((size_f & ((uint16_t)1 << (i + 2))) > 0))
      size_f |= ((uint16_t)1 << (i + 7));
  }
  uint8_t addr = 0;
  mask = 0x80;
  for (i = 0; i < 16; i++) {
    if (size_f & (uint16_t)1 << (addr))
      output[4 + 4 + (i >> 3)] |= mask;
    mask >>= 1;
    if (mask == 0)
      mask = 0x80;
    addr = addr + 8;
    if (addr > 15) {
      addr = addr - 16;
      addr += 1;
      if (addr >= 8)
        addr -= 8;
    }
  }
  full_bytes = (interleaver_len + 4) >> 3;
  remaining_bits = (interleaver_len + 4) & 0x7;
  if (remaining_bits > 0)
    full_bytes++;
  encode_turbo(input, &output[4 + 4 + 2], &output[4 + 4 + 2 + full_bytes + 1], interleaver_len, int_coeff);
  size_f = 4 * 8 + 4 * 8 + 2 * 8 + 8 * full_bytes + 1 * 8;
  if (rate == 0)
    size_f += (interleaver_len + 4) >> 2;
  else if (rate == 1)
    size_f += ((interleaver_len + 4) * 7) / 13;
  else if (rate == 2)
    size_f += (interleaver_len + 4);
  else
    size_f += 2 * (interleaver_len + 4);
  return size_f;
}
```