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AW: [avr-gcc-list] LIBRARY


From: Stumpf Michael
Subject: AW: [avr-gcc-list] LIBRARY
Date: Tue, 22 Jan 2002 07:42:11 +0100

Hello,

you must have got something wrong : avr-gcc uses IEEE

IEEE: SEEEEEEE EMMMMMMM MMMMMMMM MMMMMMMM

format with full accuracy. That means no bits lost until rounding is done.
Why do you think avr-gcc uses a differing format?

regards
Michael Stumpf

> -----Urspr√ľngliche Nachricht-----
> Von: Glen Bankston [mailto:address@hidden]
> Gesendet: Samstag, 19. Januar 2002 14:25
> An: AVR GCC
> Betreff: [avr-gcc-list] LIBRARY
>
>
> Hello,
>
> Being new to avr-gcc, how does one find a list of all the
> library functions
> available?  I have been searching through the source files,
> but that takes
> a
> lot of time.  Has anyone compiled a single document listing
> the prototypes
> and
> a brief explanation of the functions?
>
> I am going to use the mega128 on a project that needs trig,
> floating point,
> and
> a user port dedicated to one of the serial ports.  I need
> more information
> also
> on avr-gcc's IEEE floating point differences, for one of my external
> devices
> speaks in IEEE floating point binary (32 bit).
>
> IEEE: SEEEEEEE EMMMMMMM MMMMMMMM MMMMMMMM
> GCC:  SEEEEEEE MMMMMMMM MMMMMMMM MMMMMMMM
> where S = sign bit, E = exponent, and M = mantissa
>
> This is what I see as the difference, any comments?
>
> Right now, I have done all the customer's coding in assembly
> on an 8535
> (including
> fp and trig in assembly) and we just filled the flash.
>
> Thanks,
>
> Glen Bankston
> Microsystems Engineering
> Moultrie, GA
>
> avr-gcc-list at http://avr1.org
>


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