user: 请从给定的汇编指令推导出C源代码:

```asm
<lcd_draw_circle>:
  endbr64
  push   %r15
  mov    $0x1,%eax
  mov    %esi,%r11d
  mov    %edi,%r10d
  push   %r14
  sub    %edx,%eax
  push   %r13
  push   %r12
  xor    %r12d,%r12d
  push   %rbp
  mov    %r8d,%ebp
  push   %rbx
  mov    %edx,%ebx
  sub    $0x38,%rsp
  mov    %cl,0x1f(%rsp)
  mov    %eax,0x10(%rsp)
  jmp    L50
  nopl   0x0(%rax)
L33:
  mov    %r9d,%edx
  mov    %ecx,%esi
  mov    %ebp,%r8d
  mov    %eax,%edi
  mov    %r11d,0x28(%rsp)
  mov    %r10d,0x24(%rsp)
  mov    %r9d,0x20(%rsp)
  call   <lcd_draw_line@plt>
  mov    0x20(%rsp),%edx
  mov    0xc(%rsp),%edi
  mov    %ebp,%r8d
  mov    %r15d,%ecx
  mov    %r15d,%esi
  call   <lcd_draw_line@plt>
  mov    %r14d,%ecx
  mov    %r14d,%esi
  mov    0x14(%rsp),%r14d
  mov    %ebp,%r8d
  mov    %r13d,%edx
  mov    %r14d,%edi
  call   <lcd_draw_line@plt>
  mov    0x18(%rsp),%esi
  mov    %ebp,%r8d
  mov    %r13d,%edx
  mov    %r14d,%edi
  mov    %esi,%ecx
  call   <lcd_draw_line@plt>
  mov    0x10(%rsp),%ecx
  mov    0x24(%rsp),%r10d
  lea    0x1(%r12),%eax
  mov    0x28(%rsp),%r11d
  test   %ecx,%ecx
  js     L7
L47:
  mov    0x10(%rsp),%edi
  sub    %ebx,%r12d
  sub    $0x1,%ebx
  lea    0x5(%rdi,%r12,2),%edx
  mov    %edx,0x10(%rsp)
  cmp    %eax,%ebx
  jl     L53
L0:
  mov    %eax,%r12d
L50:
  mov    %r10d,%eax
  mov    %r10d,%edx
  mov    %r11d,%esi
  mov    %r11d,%r15d
  sub    %r12d,%eax
  sub    %ebx,%edx
  sub    %r12d,%esi
  sub    %ebx,%r15d
  cmpb   $0x0,0x1f(%rsp)
  mov    %eax,0xc(%rsp)
  lea    (%r11,%rbx,1),%ecx
  lea    (%r12,%r10,1),%r9d
  mov    %edx,0x14(%rsp)
  lea    (%r12,%r11,1),%r14d
  lea    (%r10,%rbx,1),%r13d
  mov    %esi,0x18(%rsp)
  jne    L33
  mov    %ecx,%esi
  mov    %r9d,%edi
  mov    %ebp,%edx
  mov    %r11d,0x2c(%rsp)
  mov    %r10d,0x28(%rsp)
  mov    %ecx,0x24(%rsp)
  mov    %r9d,0x20(%rsp)
  call   <lcd_write_pixel@plt>
  mov    %r14d,%esi
  mov    %ebp,%edx
  mov    %r13d,%edi
  call   <lcd_write_pixel@plt>
  mov    0x24(%rsp),%esi
  mov    0xc(%rsp),%edi
  mov    %ebp,%edx
  call   <lcd_write_pixel@plt>
  mov    0x14(%rsp),%edi
  mov    %r14d,%esi
  mov    %ebp,%edx
  call   <lcd_write_pixel@plt>
  mov    0x18(%rsp),%r14d
  mov    %ebp,%edx
  mov    %r13d,%edi
  mov    %r14d,%esi
  call   <lcd_write_pixel@plt>
  mov    0x20(%rsp),%edi
  mov    %ebp,%edx
  mov    %r15d,%esi
  call   <lcd_write_pixel@plt>
  mov    0xc(%rsp),%edi
  mov    %ebp,%edx
  mov    %r15d,%esi
  call   <lcd_write_pixel@plt>
  mov    0x14(%rsp),%edi
  mov    %ebp,%edx
  mov    %r14d,%esi
  call   <lcd_write_pixel@plt>
  mov    0x10(%rsp),%ecx
  mov    0x2c(%rsp),%r11d
  lea    0x1(%r12),%eax
  mov    0x28(%rsp),%r10d
  test   %ecx,%ecx
  jns    L47
L7:
  lea    0x1(%rcx,%rax,2),%edi
  mov    %edi,0x10(%rsp)
  cmp    %eax,%ebx
  jge    L0
L53:
  add    $0x38,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void lcd_draw_circle(unsigned int x0, unsigned int y0, unsigned int radius, char fill, int color) {
  int x_offset, y_offset, error;
  x_offset = 0;
  y_offset = radius;
  error = 1 - radius;
  do {
    if (fill) {
      lcd_draw_line(x0 - x_offset, y0 + y_offset, x0 + x_offset, y0 + y_offset, color);
      lcd_draw_line(x0 - x_offset, y0 - y_offset, x0 + x_offset, y0 - y_offset, color);
      lcd_draw_line(x0 - y_offset, y0 + x_offset, x0 + y_offset, y0 + x_offset, color);
      lcd_draw_line(x0 - y_offset, y0 - x_offset, x0 + y_offset, y0 - x_offset, color);
    } else {
      lcd_write_pixel(x_offset + x0, y_offset + y0, color);
      lcd_write_pixel(y_offset + x0, x_offset + y0, color);
      lcd_write_pixel(x0 - x_offset, y_offset + y0, color);
      lcd_write_pixel(x0 - y_offset, x_offset + y0, color);
      lcd_write_pixel(y_offset + x0, y0 - x_offset, color);
      lcd_write_pixel(x_offset + x0, y0 - y_offset, color);
      lcd_write_pixel(x0 - x_offset, y0 - y_offset, color);
      lcd_write_pixel(x0 - y_offset, y0 - x_offset, color);
    }
    if (error < 0)
      error += (3 + (2 * (x_offset++)));
    else
      error += (5 + (2 * ((x_offset++) - (y_offset--))));
  } while (x_offset <= y_offset);
}
```