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From: -jg on 27 Sep 2009 03:16
On Sep 27, 7:59 am, Jon Kirwan <j...(a)infinitefactors.org> wrote:
> There are.  But well-healed ones are pretty big and do a lot more than
> you are initially asking.  You still haven't described speed, code
> size, or how often these functions are required relative to the
> overall application.  So I can't even offer some thoughts.
>
> Well, best of luck.  Maybe someone else understands exactly what you
> need and where to find it.

Maybe I'm missing something, but this is AVR ? - and WinAVR has 64 bit
integer support, and is open source ?

- so that suggests a number of solutions ?

-jg

From: David Brown on 27 Sep 2009 06:01
Jon Kirwan wrote:
> On Sun, 27 Sep 2009 00:16:09 -0700 (PDT), -jg
> <jim.granville(a)gmail.com> wrote:
>
>> On Sep 27, 7:59 am, Jon Kirwan <j...(a)infinitefactors.org> wrote:
>>> There are. But well-healed ones are pretty big and do a lot more than
>>> you are initially asking. You still haven't described speed, code
>>> size, or how often these functions are required relative to the
>>> overall application. So I can't even offer some thoughts.
>>>
>>> Well, best of luck. Maybe someone else understands exactly what you
>>> need and where to find it.
>> Maybe I'm missing something, but this is AVR ? - and WinAVR has 64 bit
>> integer support, and is open source ?
>>
>> - so that suggests a number of solutions ?
>
> Sounds like it might. Apparently, the OP is using something called
> the CodeVision C compiler. So... there may be an issue or two, but
> yes. Might be worth a look. I haven't used an AVR in some time, so
> I'll leave this to the OP to figure out.
>

avr-gcc handles 64-bit "long long int", and has all the necessary
library routines for arithmetic on long longs. It's not always very
efficient - they are rarely used, and thus code quality for 64-bit ints
is not a priority for avr-gcc development. But they work correctly,
which is the most important thing, and it's probably still more
efficient than doing things manually.



From: Andrew on 27 Sep 2009 12:11
-jg wrote:
> On Sep 27, 7:59 am, Jon Kirwan <j...(a)infinitefactors.org> wrote:
>> There are. But well-healed ones are pretty big and do a lot more than
>> you are initially asking. You still haven't described speed, code
>> size, or how often these functions are required relative to the
>> overall application. So I can't even offer some thoughts.
>>
>> Well, best of luck. Maybe someone else understands exactly what you
>> need and where to find it.
>
> Maybe I'm missing something, but this is AVR ? - and WinAVR has 64 bit
> integer support, and is open source ?
>
> - so that suggests a number of solutions ?
>
> -jg
>

Yes AVR, but have code in CodeVision, not WinAVR GCC.
Porting code is not an option.

speed and code size is not important.
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