user: 提供的汇编代码用C语言表示会是什么样子:

```asm
<line>:
  endbr64
  push   %r15
  push   %r14
  push   %r13
  push   %r12
  push   %rbp
  push   %rbx
  sub    $0x18,%rsp
  mov    %edi,%r14d
  mov    %esi,%ebx
  mov    %edx,%ebp
  mov    %ecx,%r12d
  mov    %r8d,%r13d
  movl   $0x1,(%rsp)
  mov    %ecx,%eax
  sub    %esi,%eax
  mov    %eax,0x8(%rsp)
  js     L89
L133:
  movl   $0x1,0x4(%rsp)
  mov    %r13d,%r15d
  sub    %ebp,%r15d
  js     L87
L53:
  test   %r15d,%r15d
  jne    L126
  cmpl   $0x0,(%rsp)
  js     L178
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %r12d,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
L190:
  add    $0x18,%rsp
  pop    %rbx
  pop    %rbp
  pop    %r12
  pop    %r13
  pop    %r14
  pop    %r15
  ret
L89:
  mov    %esi,%eax
  sub    %ecx,%eax
  mov    %eax,0x8(%rsp)
  movl   $0xffffffff,(%rsp)
  jmp    L133
L87:
  mov    %ebp,%r15d
  sub    %r13d,%r15d
  movl   $0xffffffff,0x4(%rsp)
  jmp    L53
L178:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %r12d,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  jmp    L190
L126:
  mov    0x8(%rsp),%eax
  cmp    %r15d,%eax
  jle    L130
  cmp    %ebx,%r12d
  je     L57
  mov    %eax,0xc(%rsp)
  mov    $0x0,%r13d
  jmp    L155
L26:
  add    %r15d,%r13d
  add    (%rsp),%ebx
  cmp    %ebx,%r12d
  je     L57
L155:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  mov    0xc(%rsp),%edx
  cmp    %edx,%r13d
  jle    L26
  mov    0x8(%rsp),%eax
  sub    %r13d,%eax
  add    %eax,%edx
  mov    %edx,0xc(%rsp)
  add    0x4(%rsp),%ebp
  mov    $0x0,%r13d
  jmp    L26
L57:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  jmp    L190
L130:
  cmp    %r15d,0x8(%rsp)
  jl     L233
  cmp    %ebx,%r12d
  je     L45
L185:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  add    0x4(%rsp),%ebp
  add    (%rsp),%ebx
  cmp    %ebx,%r12d
  jne    L185
L45:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  jmp    L190
L233:
  cmp    %ebp,%r13d
  je     L24
  mov    %r15d,0xc(%rsp)
  mov    $0x0,%r12d
  jmp    L152
L182:
  add    0x8(%rsp),%r12d
  add    0x4(%rsp),%ebp
  cmp    %ebp,%r13d
  je     L24
L152:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  mov    0xc(%rsp),%ecx
  cmp    %ecx,%r12d
  jle    L182
  mov    %r15d,%eax
  sub    %r12d,%eax
  add    %eax,%ecx
  mov    %ecx,0xc(%rsp)
  add    (%rsp),%ebx
  mov    $0x0,%r12d
  jmp    L182
L24:
  mov    %r14d,%r8d
  mov    $0x0,%ecx
  mov    %ebx,%edx
  mov    %ebx,%esi
  mov    %ebp,%edi
  call   <save_line@plt>
  jmp    L190
```

assistant: ```c
void line(int cat, int x0, int y0, int x1, int y1) {
  int dx, dy;
  int xinc, yinc;
  int res1;
  int res2;
  xinc = 1;
  yinc = 1;
  if ((dx = x1 - x0) < 0) {
    xinc = -1;
    dx = -dx;
  }
  if ((dy = y1 - y0) < 0) {
    yinc = -1;
    dy = -dy;
  }
  if (dy == 0) {
    if (xinc < 0)
      save_line(y0, x1, x0, 0, cat);
    else
      save_line(y0, x0, x1, 0, cat);
  } else {
    res1 = 0;
    if (dx > dy) {
      res2 = dx;
      while (x0 != x1) {
        save_line(y0, x0, x0, 0, cat);
        if (res1 > res2) {
          res2 += dx - res1;
          res1 = 0;
          y0 += yinc;
        }
        res1 += dy;
        x0 += xinc;
      }
      save_line(y0, x0, x0, 0, cat);
    } else if (dx < dy) {
      res2 = dy;
      while (y0 != y1) {
        save_line(y0, x0, x0, 0, cat);
        if (res1 > res2) {
          res2 += dy - res1;
          res1 = 0;
          x0 += xinc;
        }
        res1 += dx;
        y0 += yinc;
      }
      save_line(y0, x0, x0, 0, cat);
    } else {
      while (x0 != x1) {
        save_line(y0, x0, x0, 0, cat);
        y0 += yinc;
        x0 += xinc;
      }
      save_line(y0, x0, x0, 0, cat);
    }
  }
}
```