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Re: [avr-gcc-list] Global variables and ISRs ???

From: Vincent Trouilliez
Subject: Re: [avr-gcc-list] Global variables and ISRs ???
Date: Wed, 07 Sep 2005 17:05:35 +0200

On Wed, 2005-09-07 at 16:41 +0200, Joerg Wunsch wrote:
> "David Brown" <address@hidden> wrote:
> > ..., and it will also change "multiply by constant" into a series of
> > shifts and adds.  The target chip has a hardware multiplier and
> > divider, but they are slower than the shift-and-add sequences.
> Unfortunately, AVR-GCC also does this, even though the hardware
> multiplier is faster than a series of shift and add. :-(

Oh noooo, that's crap :-(

Can't we just have an command line option to force the use of the H/W
multiplier ? How should we do to submit this as a top-priority goal for
the next release of avr-gcc ? Is anyone in the avr-gcc team on this
list ?? This needs to be addressed ! :-/


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