Re: [Sdcc-user] sdcc and some weird bug !

[Maarten B. <sou...@ds...>]

Jonathan,

Vangelis meant this bug report I think:
http://sourceforge.net/tracker/index.php?func=detail&aid=974835&grou
p_id=599&atid=100599

But what it comes down to is that ~ promotes the bit to an int as 
required by the C99 std. After complementing the bits in the int it is 
cast back down to a bit by comparing it to 0. So there is no bug here, 
it's just what the standard says it should do. As you found out, if you 
want to invert a bit variable, use !.

> ----- Original Message ----- 
> From: "jonathan dumaresq" <jdu...@ci...>
> To: <sdc...@li...>
> Subject: [Sdcc-user] sdcc and some weird bug !
> 
> 
> >  while(1)
> >   {
> >
> >   PORTCbits.RC1 = !PORTCbits.RC1;
> >
> >   PORTAbits.RA5 = ~PORTAbits.RA5;
> >   }
> >  }
> >
> > whit this code only RC0 toggle.
> >
> > the RA5 dosen't toggle..
> >
> > so this is very weird !
> 
> Check the following conversation taking place in sdcc-devel list. It
> has some references to ~ and ! operators...
> 
> http://sourceforge.net/tracker/?func=detail&atid=100599&aid=979599&gro
> up_id=599
> 
> 
> Vangelis