user: 这段汇编代码用C语言表示是什么样的:

```asm
<circle>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x28,%rsp
  mov    %edi,%r14d
  mov    %edi,0x8(%rsp)
  mov    %esi,%r15d
  mov    %esi,0x10(%rsp)
  mov    %edx,%ebp
  mov    %ecx,%ebx
  mov    $0x1,%eax
  sub    %edx,%eax
  mov    %eax,0x14(%rsp)
  lea    (%rdx,%rdx,1),%eax
  mov    $0x5,%edx
  sub    %eax,%edx
  mov    %edx,0x1c(%rsp)
  sub    %ebp,%esi
  mov    %ecx,%edx
  call   <plot@plt>
  lea    0x0(%rbp,%r15,1),%esi
  mov    %ebx,%edx
  mov    %r14d,%edi
  call   <plot@plt>
  lea    0x0(%rbp,%r14,1),%edi
  mov    %ebx,%edx
  mov    %r15d,%esi
  call   <plot@plt>
  mov    %r14d,%edi
  sub    %ebp,%edi
  mov    %ebx,%edx
  mov    %r15d,%esi
  call   <plot@plt>
  test   %ebp,%ebp
  jle    L7
  movl   $0x5,0x18(%rsp)
  mov    $0x1,%eax
  mov    %ebp,0x4(%rsp)
  mov    %eax,%ebp
  jmp    L6
L31:
  mov    0x1c(%rsp),%eax
  add    %eax,0x14(%rsp)
  add    $0x4,%eax
  mov    %eax,0x1c(%rsp)
  mov    %ebp,0xc(%rsp)
  subl   $0x1,0x4(%rsp)
L29:
  mov    0x10(%rsp),%r15d
  mov    0x4(%rsp),%r14d
  sub    %r14d,%r15d
  mov    0x8(%rsp),%eax
  lea    (%rax,%rbp,1),%r12d
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r12d,%edi
  call   <plot@plt>
  mov    %r14d,0x4(%rsp)
  mov    %r14d,%r13d
  add    0x10(%rsp),%r13d
  mov    0x8(%rsp),%eax
  sub    0xc(%rsp),%eax
  mov    %eax,%r14d
  mov    %ebx,%edx
  mov    %r13d,%esi
  mov    %eax,%edi
  call   <plot@plt>
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r14d,%edi
  call   <plot@plt>
  mov    %ebx,%edx
  mov    %r13d,%esi
  mov    %r12d,%edi
  call   <plot@plt>
  mov    0x10(%rsp),%r13d
  mov    %r13d,%r15d
  sub    0xc(%rsp),%r15d
  mov    0x4(%rsp),%r14d
  mov    %r14d,%r12d
  add    0x8(%rsp),%r12d
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r12d,%edi
  call   <plot@plt>
  add    %ebp,%r13d
  mov    0x8(%rsp),%eax
  mov    %r14d,0x4(%rsp)
  sub    %r14d,%eax
  mov    %eax,%r14d
  mov    %ebx,%edx
  mov    %r13d,%esi
  mov    %eax,%edi
  call   <plot@plt>
  mov    %ebx,%edx
  mov    %r15d,%esi
  mov    %r14d,%edi
  call   <plot@plt>
  mov    %ebx,%edx
  mov    %r13d,%esi
  mov    %r12d,%edi
  call   <plot@plt>
  add    $0x1,%ebp
  addl   $0x2,0x18(%rsp)
  mov    0x4(%rsp),%r14d
  cmp    %r14d,0xc(%rsp)
  jge    L7
L6:
  mov    0x18(%rsp),%eax
  sub    $0x2,%eax
  mov    0x14(%rsp),%ecx
  test   %ecx,%ecx
  jns    L31
  add    %eax,%ecx
  mov    %ecx,0x14(%rsp)
  addl   $0x2,0x1c(%rsp)
  mov    %ebp,0xc(%rsp)
  jmp    L29
L7:
  add    $0x28,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
```

assistant: ```c
void circle(int xcent, int ycent, int rad, int colr) {
  int x, y, d;
  int dE, dSE;
  x = 0;
  y = rad;
  d = 1 - rad;
  dE = 3;
  dSE = -(rad << 1) + 5;
  plot(xcent - x, ycent - y, colr);
  plot(xcent - x, ycent + y, colr);
  plot(xcent + y, ycent - x, colr);
  plot(xcent - y, ycent + x, colr);
  while (y > x) {
    if (d < 0) {
      d += dE;
      dE += 2;
      dSE += 2;
      ++x;
    } else {
      d += dSE;
      dE += 2;
      dSE += 4;
      ++x;
      --y;
    }
    plot(xcent + x, ycent - y, colr);
    plot(xcent - x, ycent + y, colr);
    plot(xcent - x, ycent - y, colr);
    plot(xcent + x, ycent + y, colr);
    plot(xcent + y, ycent - x, colr);
    plot(xcent - y, ycent + x, colr);
    plot(xcent - y, ycent - x, colr);
    plot(xcent + y, ycent + x, colr);
  }
}
```