user: 请从给定的汇编指令推导出C源代码:

```asm
<lcd_printf16>:
  endbr64
  push   %rbp
  mov    %rsp,%rbp
  sub    $0x70,%rsp
  mov    %rdi,-0x58(%rbp)
  mov    %esi,-0x5c(%rbp)
  mov    %edx,-0x60(%rbp)
  mov    %rcx,-0x68(%rbp)
  mov    %fs:0x28,%rax
  mov    %rax,-0x8(%rbp)
  xor    %eax,%eax
  cmpq   $0x0,-0x58(%rbp)
  sete   %dl
  cmpq   $0x0,-0x68(%rbp)
  sete   %al
  or     %edx,%eax
  test   %al,%al
  je     L15
  mov    $0xffffffff,%eax
  jmp    L26
L15:
  cmpl   $0x1e0,-0x5c(%rbp)
  jg     L11
  cmpl   $0x110,-0x60(%rbp)
  jle    L98
L11:
  mov    $0xfffffffe,%eax
  jmp    L26
L98:
  mov    -0x68(%rbp),%rax
  mov    %rax,-0x40(%rbp)
  mov    -0x5c(%rbp),%eax
  mov    %eax,-0x48(%rbp)
  mov    $0x1e0,%eax
  sub    -0x5c(%rbp),%eax
  lea    0x7(%rax),%edx
  test   %eax,%eax
  cmovs  %edx,%eax
  sar    $0x3,%eax
  mov    %eax,-0x44(%rbp)
  mov    -0x44(%rbp),%eax
  mov    %eax,-0x50(%rbp)
  movl   $0x2,-0x4c(%rbp)
  jmp    L87
L63:
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jns    L40
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  add    $0x60,%eax
  mov    %al,-0xa(%rbp)
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jns    L77
  mov    -0x40(%rbp),%rax
  lea    0x1(%rax),%rdx
  mov    %rdx,-0x40(%rbp)
  movzbl (%rax),%eax
  add    $0x60,%eax
  mov    %al,-0x9(%rbp)
  movzbl -0xa(%rbp),%eax
  movzbl %al,%eax
  sub    $0x1,%eax
  imul   $0x5e,%eax,%edx
  movzbl -0x9(%rbp),%eax
  movzbl %al,%eax
  sub    $0x1,%eax
  add    %edx,%eax
  shl    $0x5,%eax
  cltq
  mov    %rax,-0x38(%rbp)
  lea    -0x30(%rbp),%rdx
  mov    -0x38(%rbp),%rax
  mov    %rdx,%rsi
  mov    %rax,%rdi
  call   <get_hzk16_font@plt>
  lea    -0x30(%rbp),%rcx
  mov    -0x60(%rbp),%edx
  mov    -0x5c(%rbp),%esi
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdi
  call   <putc_lcd_hzk16@plt>
  addl   $0x10,-0x5c(%rbp)
  subl   $0x2,-0x50(%rbp)
  jmp    L147
L77:
  mov    $0xfffffffc,%eax
  jmp    L26
L40:
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  movzbl %al,%ecx
  mov    -0x60(%rbp),%edx
  mov    -0x5c(%rbp),%esi
  mov    -0x58(%rbp),%rax
  mov    %rax,%rdi
  call   <putc_lcd_asc16@plt>
  addq   $0x1,-0x40(%rbp)
  addl   $0x8,-0x5c(%rbp)
  subl   $0x1,-0x50(%rbp)
L147:
  cmpl   $0x2,-0x50(%rbp)
  jle    L153
  jmp    L87
L153:
  subl   $0x1,-0x4c(%rbp)
  mov    -0x44(%rbp),%eax
  mov    %eax,-0x50(%rbp)
  addl   $0x10,-0x60(%rbp)
  mov    -0x48(%rbp),%eax
  mov    %eax,-0x5c(%rbp)
  cmpl   $0x0,-0x4c(%rbp)
  jne    L87
  mov    $0xfffffffd,%eax
  jmp    L26
L87:
  mov    -0x40(%rbp),%rax
  movzbl (%rax),%eax
  test   %al,%al
  jne    L63
  mov    $0x0,%eax
L26:
  mov    -0x8(%rbp),%rdx
  sub    %fs:0x28,%rdx
  je     L69
  call   <__stack_chk_fail@plt>
L69:
  leave
  ret
```

assistant: ```c
int lcd_printf16(char *fb, int x, int y, unsigned char *font) {
  unsigned char inode[2];
  unsigned char *ft;
  unsigned long ftoft;
  unsigned char mat[16][2];
  int xnum, curx, line, xreg;
  if (!fb | !font)
    return -1;
  if (x > 480 || y > 272)
    return -2;
  ft = font;
  xreg = x;
  xnum = (480 - x) / 8;
  curx = xnum;
  line = 2;
  while (*ft != '\0') {
    if (*ft & 0x80) {
      inode[0] = *ft++ - 0xa0;
      if (*ft & 0x80)
        inode[1] = *ft++ - 0xa0;
      else
        return -4;
      ftoft = ((inode[0] - 1) * 94 + (inode[1] - 1)) * 32;
      get_hzk16_font(ftoft, (unsigned char *)mat);
      putc_lcd_hzk16(fb, x, y, (unsigned char *)mat);
      x += 16;
      curx -= 2;
    } else {
      putc_lcd_asc16(fb, x, y, *ft);
      ft++;
      x += 8;
      curx -= 1;
    }
    if (curx > 2)
      continue;
    else {
      line--;
      curx = xnum;
      y += 16;
      x = xreg;
    }
    if (line == 0)
      return -3;
  }
  return 0;
}
```