user: 这段汇编代码用C语言表示是什么样的：

```asm
<process_plane>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x48(%rbp)
  mov    %esi,-0x4c(%rbp)
  mov    %edx,-0x50(%rbp)
  mov    %rcx,-0x58(%rbp)
  mov    %r8d,-0x5c(%rbp)
  mov    -0x48(%rbp),%rax
  mov    %rax,-0x18(%rbp)
  mov    -0x58(%rbp),%rax
  mov    %rax,-0x10(%rbp)
  movq   $0x0,-0x20(%rbp)
  movl   $0x0,-0x3c(%rbp)
  jmp    L127
L13:
  mov    -0x4c(%rbp),%eax
  imul   -0x50(%rbp),%eax
  shl    $0x2,%eax
  cltq
  mov    -0x3c(%rbp),%edx
  add    $0x1,%edx
  imul   -0x4c(%rbp),%edx
  shl    $0x2,%edx
  movslq %edx,%rdx
  sub    %rdx,%rax
  mov    %rax,%rcx
  mov    -0x10(%rbp),%rax
  add    %rcx,%rax
  mov    %rax,-0x58(%rbp)
  movl   $0x0,-0x30(%rbp)
  mov    -0x58(%rbp),%rax
  mov    %rax,-0x8(%rbp)
  movl   $0x0,-0x40(%rbp)
  cmpq   $0x0,-0x20(%rbp)
  jne    L37
  jmp    L142
L109:
  mov    -0x48(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x48(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x2c(%rbp),%eax
  sar    $0x4,%eax
  and    $0xf,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x34(%rbp),%eax
  shl    $0x4,%eax
  or     -0x38(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  cmpl   $0x2f,-0x28(%rbp)
  jg     L166
  cmpl   $0xf,-0x28(%rbp)
  jle    L166
  mov    -0x28(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L166
L94:
  mov    -0x48(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x48(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,-0x30(%rbp)
  mov    -0x30(%rbp),%eax
  mov    %eax,%edx
  mov    -0x58(%rbp),%rax
  mov    %dl,(%rax)
  addq   $0x4,-0x58(%rbp)
  addl   $0x1,-0x40(%rbp)
  subl   $0x1,-0x38(%rbp)
L166:
  cmpl   $0x0,-0x38(%rbp)
  jg     L94
  jmp    L123
L48:
  mov    -0x30(%rbp),%eax
  mov    %eax,%edx
  mov    -0x58(%rbp),%rax
  mov    %dl,(%rax)
  addq   $0x4,-0x58(%rbp)
  addl   $0x1,-0x40(%rbp)
  subl   $0x1,-0x34(%rbp)
L123:
  cmpl   $0x0,-0x34(%rbp)
  jg     L48
L142:
  mov    -0x40(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L109
  jmp    L192
L200:
  mov    -0x48(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x48(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,-0x2c(%rbp)
  mov    -0x2c(%rbp),%eax
  and    $0xf,%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x2c(%rbp),%eax
  sar    $0x4,%eax
  and    $0xf,%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x34(%rbp),%eax
  shl    $0x4,%eax
  or     -0x38(%rbp),%eax
  mov    %eax,-0x28(%rbp)
  cmpl   $0x2f,-0x28(%rbp)
  jg     L146
  cmpl   $0xf,-0x28(%rbp)
  jle    L146
  mov    -0x28(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  movl   $0x0,-0x38(%rbp)
  jmp    L146
L189:
  mov    -0x48(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x48(%rbp)
  movzbl (%rax),%eax
  movzbl %al,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  and    $0x1,%eax
  test   %eax,%eax
  je     L101
  sarl   -0x24(%rbp)
  addl   $0x1,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  neg    %eax
  mov    %eax,-0x30(%rbp)
  jmp    L98
L101:
  sarl   -0x24(%rbp)
  mov    -0x24(%rbp),%eax
  mov    %eax,-0x30(%rbp)
L98:
  mov    -0x40(%rbp),%eax
  shl    $0x2,%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  mov    %eax,%edx
  mov    -0x58(%rbp),%rax
  mov    %dl,(%rax)
  addq   $0x4,-0x58(%rbp)
  addl   $0x1,-0x40(%rbp)
  subl   $0x1,-0x38(%rbp)
L146:
  cmpl   $0x0,-0x38(%rbp)
  jg     L189
  jmp    L203
L1:
  mov    -0x40(%rbp),%eax
  shl    $0x2,%eax
  movslq %eax,%rdx
  mov    -0x20(%rbp),%rax
  add    %rdx,%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  mov    -0x30(%rbp),%eax
  add    %edx,%eax
  mov    %eax,-0x24(%rbp)
  mov    -0x24(%rbp),%eax
  mov    %eax,%edx
  mov    -0x58(%rbp),%rax
  mov    %dl,(%rax)
  addq   $0x4,-0x58(%rbp)
  addl   $0x1,-0x40(%rbp)
  subl   $0x1,-0x34(%rbp)
L203:
  cmpl   $0x0,-0x34(%rbp)
  jg     L1
L37:
  mov    -0x40(%rbp),%eax
  cmp    -0x4c(%rbp),%eax
  jl     L200
L192:
  addl   $0x1,-0x3c(%rbp)
  mov    -0x8(%rbp),%rax
  mov    %rax,-0x20(%rbp)
L127:
  mov    -0x3c(%rbp),%eax
  cmp    -0x50(%rbp),%eax
  jl     L13
  mov    -0x48(%rbp),%rax
  sub    -0x18(%rbp),%rax
  pop    %rbp
  ret
```

assistant: ```c
int process_plane(unsigned char *in, int width, int height, unsigned char *out, int size) {
  int indexw;
  int indexh;
  int code;
  int collen;
  int replen;
  int color;
  int x;
  int revcode;
  unsigned char *last_line;
  unsigned char *this_line;
  unsigned char *org_in;
  unsigned char *org_out;
  org_in = in;
  org_out = out;
  last_line = 0;
  indexh = 0;
  while (indexh < height) {
    out = (org_out + width * height * 4) - ((indexh + 1) * width * 4);
    color = 0;
    this_line = out;
    indexw = 0;
    if (last_line == 0) {
      while (indexw < width) {
        code = (*(in++));
        replen = code & 0xf;
        collen = (code >> 4) & 0xf;
        revcode = (replen << 4) | collen;
        if ((revcode <= 47) && (revcode >= 16)) {
          replen = revcode;
          collen = 0;
        }
        while (collen > 0) {
          color = (*(in++));
          *out = color;
          out += 4;
          indexw++;
          collen--;
        }
        while (replen > 0) {
          *out = color;
          out += 4;
          indexw++;
          replen--;
        }
      }
    } else {
      while (indexw < width) {
        code = (*(in++));
        replen = code & 0xf;
        collen = (code >> 4) & 0xf;
        revcode = (replen << 4) | collen;
        if ((revcode <= 47) && (revcode >= 16)) {
          replen = revcode;
          collen = 0;
        }
        while (collen > 0) {
          x = (*(in++));
          if (x & 1) {
            x = x >> 1;
            x = x + 1;
            color = -x;
          } else {
            x = x >> 1;
            color = x;
          }
          x = last_line[indexw * 4] + color;
          *out = x;
          out += 4;
          indexw++;
          collen--;
        }
        while (replen > 0) {
          x = last_line[indexw * 4] + color;
          *out = x;
          out += 4;
          indexw++;
          replen--;
        }
      }
    }
    indexh++;
    last_line = this_line;
  }
  return (int)(in - org_in);
}
```