[sdcc-devel] [ sdcc-Bugs-1368489 ] boolean castings ???

[SourceForge.net <no...@so...>]

Bugs item #1368489, was opened at 2005-11-28 19:42
Message generated for change (Comment added) made by bernhardheld
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1368489&group_id=599

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
>Category: C-Front End
>Group: None
>Status: Open
>Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
>Assigned to: Bernhard Held (bernhardheld)
Summary: boolean castings ???

Initial Comment:
#define MICROCONTROLLER_SAB80517

void main()
{  char a;
   
   for(;;)
   {
    a +=1;
    
    P5_7 = a < 0x80;  // not working !!!!!

    P5_6 = !(a > 0x80); // OK

    P5_5 = a;   // OK
   }
}

 whats about P5_7 = a < 0x80; ????

rei...@in...

 sdcc vers. 2.4.8

thanks for any suggestion !!

----------------------------------------------------------------------

>Comment By: Bernhard Held (bernhardheld)
Date: 2005-11-28 23:06

Message:
Logged In: YES 
user_id=203539

> According to the C standard 0x80 is an unsigned int.   
> According to the SDCC manual char is signed.   
This can't be the whole story. The value range of variable 
'a' (signed char) is -128...+127, and this is always 
smaller than 0x80 == +128. 
Operations with both a 'signed char' and 'unsigned char' 
are really hairy, this needs a 2nd thought. 

----------------------------------------------------------------------

Comment By: Maarten Brock (maartenbrock)
Date: 2005-11-28 20:50

Message:
Logged In: YES 
user_id=888171

According to the C standard 0x80 is an unsigned int.
According to the SDCC manual char is signed.
I leave the math to you.


----------------------------------------------------------------------

You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=100599&aid=1368489&group_id=599