Re: inline assembler

[Falk Hueffner <falk.hueffner@student.uni-tuebingen.de>]

y2bismil@engmail.uwaterloo.ca writes:

> I was wondering about inline assember.  I've been reading up quite a bit on it,
> and have noticed a common pattern to 'emulate' functions.
> ***************************************
> example from: 
> http://www.delorie.com/djgpp/doc/brennan/brennan_att_inline_djgpp.html
> ***************************************
> #define times3(arg1, arg2) \
> __asm__ ( \
>   "leal (%0,%0,2),%0" \
>   : "=r" (arg2) \
>   : "0" (arg1) );
> ***************************************
> 
> Is there a way in inline assembler to do 'real' functions?  As an example
> suppose I have the following:  
> #define times3(arg1)__asm__ (...);  /*this results in arg1*3*/
> 
> Would there be a way for me to say 
> int x = times3(arg1);

Just define an inline function:

static inline int times3(int x) {
  int r;
  asm(...);
  return r; 
}

-- 
	Falk