user: 提供的汇编代码用C语言表示会是什么样子：

```asm
<__imlib_ReBlendShapedSpanToRGB>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  mov    %rdi,-0x18(%rbp)
  mov    %esi,-0x1c(%rbp)
  mov    %rdx,-0x28(%rbp)
  mov    %ecx,-0x20(%rbp)
  lea    -0x1c(%rbp),%rax
  add    $0x3,%rax
  movzbl (%rax),%eax
  cmp    $0xff,%al
  je     L16
  jmp    L65
L39:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  test   %eax,%eax
  je     L48
  cmp    $0xff,%eax
  jne    L35
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  lea    -0x1c(%rbp),%rax
  add    $0x3,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x4(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  lea    -0x1c(%rbp),%rax
  add    $0x3,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x4(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  lea    -0x1c(%rbp),%rax
  add    $0x3,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  or     %eax,%edx
  mov    -0x4(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  and    %eax,%edx
  mov    -0x28(%rbp),%rax
  mov    %dl,(%rax)
  jmp    L13
L35:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  lea    -0x1c(%rbp),%rax
  add    $0x3,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sub    $0xffffff80,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  add    %edx,%eax
  shr    $0x8,%eax
  mov    %al,-0x9(%rbp)
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  movzbl -0x9(%rbp),%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x4(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  movzbl -0x9(%rbp),%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x4(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  movzbl -0x9(%rbp),%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x4(%rbp)
  mov    -0x4(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x4(%rbp),%eax
  or     %eax,%edx
  mov    -0x4(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  and    %eax,%edx
  mov    -0x28(%rbp),%rax
  mov    %dl,(%rax)
  jmp    L13
L48:
  nop
L13:
  addq   $0x1,-0x18(%rbp)
  addq   $0x4,-0x28(%rbp)
L65:
  mov    -0x20(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x20(%rbp)
  test   %eax,%eax
  jne    L39
  jmp    L56
L46:
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  test   %eax,%eax
  je     L53
  cmp    $0xff,%eax
  jne    L29
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  lea    -0x1c(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  sub    $0x7f,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x8(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  lea    -0x1c(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  sub    $0x7f,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x8(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%edx
  lea    -0x1c(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  sub    $0x7f,%eax
  add    %eax,%eax
  add    %edx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  or     %eax,%edx
  mov    -0x8(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  and    %eax,%edx
  mov    -0x28(%rbp),%rax
  mov    %dl,(%rax)
  jmp    L24
L29:
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  add    $0x2,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x8(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x2,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  add    $0x1,%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  mov    %edx,%ecx
  or     %eax,%ecx
  mov    -0x8(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  mov    %eax,%edx
  mov    -0x28(%rbp),%rax
  add    $0x1,%rax
  and    %ecx,%edx
  mov    %dl,(%rax)
  mov    -0x28(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  lea    -0x1c(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  lea    -0x7f(%rax),%edx
  mov    -0x18(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%eax
  imul   %edx,%eax
  sar    $0x7,%eax
  add    %ecx,%eax
  mov    %eax,-0x8(%rbp)
  mov    -0x8(%rbp),%eax
  shr    $0x8,%eax
  neg    %eax
  mov    %eax,%edx
  mov    -0x8(%rbp),%eax
  or     %eax,%edx
  mov    -0x8(%rbp),%eax
  shr    $0x9,%eax
  not    %eax
  and    %eax,%edx
  mov    -0x28(%rbp),%rax
  mov    %dl,(%rax)
  jmp    L24
L53:
  nop
L24:
  addq   $0x1,-0x18(%rbp)
  addq   $0x4,-0x28(%rbp)
L16:
  mov    -0x20(%rbp),%eax
  lea    -0x1(%rax),%edx
  mov    %edx,-0x20(%rbp)
  test   %eax,%eax
  jne    L46
L56:
  pop    %rbp
  ret
```

assistant: ```c
void __imlib_ReBlendShapedSpanToRGB(unsigned char *src, unsigned int color, unsigned int *dst, int len) {
  if (((unsigned char *)(&color))[3] < 255) {
    while (len--) {
      unsigned int tmp;
      unsigned char a;
      switch (*src) {
      case 0:
        break;
      case 255: {
        tmp = (((unsigned char *)(dst))[2]) + ((((((unsigned char *)(&color))[2]) - 127) * (((unsigned char *)(&color))[3])) >> 7);
        ((unsigned char *)(dst))[2] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        tmp = (((unsigned char *)(dst))[1]) + ((((((unsigned char *)(&color))[1]) - 127) * (((unsigned char *)(&color))[3])) >> 7);
        ((unsigned char *)(dst))[1] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        tmp = (((unsigned char *)(dst))[0]) + ((((((unsigned char *)(&color))[0]) - 127) * (((unsigned char *)(&color))[3])) >> 7);
        ((unsigned char *)(dst))[0] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        ;
        break;
      }
      default: {
        do {
          tmp = ((*src) * (((unsigned char *)(&color))[3])) + 0x80;
          a = (tmp + (tmp >> 8)) >> 8;
        } while (0);
        tmp = (((unsigned char *)(dst))[2]) + ((((((unsigned char *)(&color))[2]) - 127) * (a)) >> 7);
        ((unsigned char *)(dst))[2] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        tmp = (((unsigned char *)(dst))[1]) + ((((((unsigned char *)(&color))[1]) - 127) * (a)) >> 7);
        ((unsigned char *)(dst))[1] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        tmp = (((unsigned char *)(dst))[0]) + ((((((unsigned char *)(&color))[0]) - 127) * (a)) >> 7);
        ((unsigned char *)(dst))[0] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        ;
        break;
      }
      }
      src++;
      dst++;
    }
    return;
  }
  while (len--) {
    unsigned int tmp;
    switch (*src) {
    case 0:
      break;
    case 255: {
      do {
        tmp = (((unsigned char *)(dst))[2]) + (((((unsigned char *)(&color))[2]) - 127) << 1);
        ((unsigned char *)(dst))[2] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        tmp = (((unsigned char *)(dst))[1]) + (((((unsigned char *)(&color))[1]) - 127) << 1);
        ((unsigned char *)(dst))[1] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
        tmp = (((unsigned char *)(dst))[0]) + (((((unsigned char *)(&color))[0]) - 127) << 1);
        ((unsigned char *)(dst))[0] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
        ;
      } while (0);
      break;
    }
    default: {
      tmp = (((unsigned char *)(dst))[2]) + ((((((unsigned char *)(&color))[2]) - 127) * (*src)) >> 7);
      ((unsigned char *)(dst))[2] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
      ;
      tmp = (((unsigned char *)(dst))[1]) + ((((((unsigned char *)(&color))[1]) - 127) * (*src)) >> 7);
      ((unsigned char *)(dst))[1] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
      ;
      tmp = (((unsigned char *)(dst))[0]) + ((((((unsigned char *)(&color))[0]) - 127) * (*src)) >> 7);
      ((unsigned char *)(dst))[0] = (tmp | (-(tmp >> 8))) & (~(tmp >> 9));
      ;
      ;
      break;
    }
    }
    src++;
    dst++;
  }
}
```