user: 下面的汇编指令对应的C源代码是什么:

```asm
<vp10_blit_line>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x50,%rsp
  mov    %edi,-0x34(%rbp)
  mov    %esi,-0x38(%rbp)
  mov    %edx,-0x3c(%rbp)
  mov    %ecx,-0x40(%rbp)
  mov    %r8,-0x48(%rbp)
  mov    %r9d,-0x4c(%rbp)
  mov    -0x40(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  mov    %eax,%edx
  neg    %edx
  cmovs  %eax,%edx
  mov    -0x38(%rbp),%eax
  sub    -0x34(%rbp),%eax
  mov    %eax,%ecx
  neg    %ecx
  cmovns %ecx,%eax
  cmp    %eax,%edx
  setg   %al
  movzbl %al,%eax
  mov    %eax,-0x14(%rbp)
  cmpl   $0x0,-0x14(%rbp)
  je     L49
  mov    -0x34(%rbp),%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0x10(%rbp),%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x10(%rbp)
  mov    -0x40(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x10(%rbp),%eax
  mov    %eax,-0x40(%rbp)
L49:
  mov    -0x34(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jle    L110
  mov    -0x34(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x38(%rbp),%eax
  mov    %eax,-0x34(%rbp)
  mov    -0xc(%rbp),%eax
  mov    %eax,-0x38(%rbp)
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0xc(%rbp)
  mov    -0x40(%rbp),%eax
  mov    %eax,-0x3c(%rbp)
  mov    -0xc(%rbp),%eax
  mov    %eax,-0x40(%rbp)
L110:
  mov    -0x38(%rbp),%eax
  sub    -0x34(%rbp),%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x40(%rbp),%eax
  sub    -0x3c(%rbp),%eax
  mov    %eax,%edx
  neg    %edx
  cmovns %edx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x8(%rbp),%eax
  mov    %eax,%edx
  shr    $0x1f,%edx
  add    %edx,%eax
  sar    %eax
  mov    %eax,-0x24(%rbp)
  mov    -0x3c(%rbp),%eax
  mov    %eax,-0x1c(%rbp)
  mov    -0x3c(%rbp),%eax
  cmp    -0x40(%rbp),%eax
  jge    L25
  movl   $0x1,-0x20(%rbp)
  jmp    L65
L25:
  movl   $0xffffffff,-0x20(%rbp)
L65:
  cmpl   $0x0,-0x14(%rbp)
  je     L74
  mov    -0x34(%rbp),%eax
  mov    %eax,-0x18(%rbp)
  jmp    L2
L43:
  mov    -0x4c(%rbp),%ecx
  mov    -0x48(%rbp),%rdx
  mov    -0x18(%rbp),%esi
  mov    -0x1c(%rbp),%eax
  mov    %eax,%edi
  call   <plot@plt>
  mov    -0x4(%rbp),%eax
  sub    %eax,-0x24(%rbp)
  cmpl   $0x0,-0x24(%rbp)
  jns    L111
  mov    -0x20(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x8(%rbp),%eax
  add    %eax,-0x24(%rbp)
L111:
  addl   $0x1,-0x18(%rbp)
L2:
  mov    -0x18(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jle    L43
  jmp    L86
L74:
  mov    -0x34(%rbp),%eax
  mov    %eax,-0x18(%rbp)
  jmp    L33
L20:
  mov    -0x4c(%rbp),%ecx
  mov    -0x48(%rbp),%rdx
  mov    -0x1c(%rbp),%esi
  mov    -0x18(%rbp),%eax
  mov    %eax,%edi
  call   <plot@plt>
  mov    -0x4(%rbp),%eax
  sub    %eax,-0x24(%rbp)
  cmpl   $0x0,-0x24(%rbp)
  jns    L91
  mov    -0x20(%rbp),%eax
  add    %eax,-0x1c(%rbp)
  mov    -0x8(%rbp),%eax
  add    %eax,-0x24(%rbp)
L91:
  addl   $0x1,-0x18(%rbp)
L33:
  mov    -0x18(%rbp),%eax
  cmp    -0x38(%rbp),%eax
  jle    L20
L86:
  nop
  leave
  ret
```

assistant: ```c
void vp10_blit_line(int x0, int x1, int y0, int y1, unsigned char *image, int pitch) {
  int steep = abs(y1 - y0) > abs(x1 - x0);
  int deltax, deltay;
  int error, ystep, y, x;
  if (steep) {
    int t;
    t = x0;
    x0 = y0;
    y0 = t;
    t = x1;
    x1 = y1;
    y1 = t;
  }
  if (x0 > x1) {
    int t;
    t = x0;
    x0 = x1;
    x1 = t;
    t = y0;
    y0 = y1;
    y1 = t;
  }
  deltax = x1 - x0;
  deltay = abs(y1 - y0);
  error = deltax / 2;
  y = y0;
  if (y0 < y1)
    ystep = 1;
  else
    ystep = -1;
  if (steep) {
    for (x = x0; x <= x1; x++) {
      plot(y, x, image, pitch);
      error = error - deltay;
      if (error < 0) {
        y = y + ystep;
        error = error + deltax;
      }
    }
  } else {
    for (x = x0; x <= x1; x++) {
      plot(x, y, image, pitch);
      error = error - deltay;
      if (error < 0) {
        y = y + ystep;
        error = error + deltax;
      }
    }
  }
}
```