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AW: [avr-gcc-list] update on the last issue


From: Haase Bjoern (PT-BEU/EMT) *
Subject: AW: [avr-gcc-list] update on the last issue
Date: Tue, 5 Apr 2005 09:32:48 +0200

Hi,

Expect long long support to be *extremely* inefficient for AVR. IIRC, e.g., 
long long adds are implemented by a library function written in C that will add 
one bit at a time ... The back-end does not supply any support for using long 
longs so anything we have at the moment is the generic support of GCC's libgcc2.

Yours,

Björn

-----Urspr√ľngliche Nachricht-----
Von: address@hidden [mailto:address@hidden Im Auftrag von David Gesswein
Gesendet: Montag, 4. April 2005 20:53
An: address@hidden
Betreff: Re: [avr-gcc-list] update on the last issue

Haven't played enough with the GCC avr port to have direct knowledge of
long long in it but these should help:

http://gcc.gnu.org/onlinedocs/gcc/Long-Long.html

http://lists.gnu.org/archive/html/avr-libc-dev/2004-09/msg00038.html

> 
> Hi,
> I did a little bit more of search and figured that if i use the long
> long for my X, Y coordinates and the sums, I should be able to handle
> extremely large numbers. But now When i do that, it still give me
> incorrect results. Even when i try to assign them those high values
> directly, it fails!!!!
> 
...


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