Register Calling Convention Ojbect Pascal的默认调用约定为register,寄存器调用约定会将前三个参数依次放入eax,edx,ecx,返回值是eax(根据类型不同有差别). function Add3Int(i,j,k:integer): integer; //i,j,k依次放入eax,edx,ecx asm add eax,edx add eax,ecx end; procedure TForm1.btnTestPureAsmClick(Sender: