[avr-chat] Passing parameters to asm functions

[Kreyl]

    Hi, Joerg!

  Listen,  how can I pass some parameters to asm function from С code?
  I  declared  the  function  as 
  
  extern  int_16  MyFunc  (int16_t  Param1,  uint8_t  Param2,  int16_t *Param3)
  
  I  write  some .S file with asm code. But how shold I use Param1,2,3
  in this asm? And how can I return a value? 
  
  It  seems  that compiler passes params in r24 and r25 in most cases,
  and  sometimes  uses  Y pointer. Where exactly should I know what to
  use?
  
  Thanks!

 
                                          Best regards,
                                                        Kreyl

                                          mailto: address@hidden
                                             ICQ: 171094105