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Re: [avr-gcc-list] Global variables and ISRs ???
From: |
Joerg Wunsch |
Subject: |
Re: [avr-gcc-list] Global variables and ISRs ??? |
Date: |
Wed, 7 Sep 2005 21:24:13 +0200 (MET DST) |
Vincent Trouilliez <address@hidden> wrote:
> Can't we just have an command line option to force the use of the
> H/W multiplier ?
Nope, because it doesn't make sense.
It needs to be fixed, OK, but it doesn't make the slightest sense to
start hacking up command-line option workarounds for not quite optimal
optimizations, instead of rather fixing the problem itself. I doubt
your patches would be accepted by the GCC folks if you were trying to
do that.
> How should we do to submit this as a top-priority goal for
> the next release of avr-gcc ?
Top-priority? Sorry.
Top-priority right now might be adding at least some form of support
for the ATmega256, as these devices apparently start to ship right
now.
There's for sure a lot of potential for improvement, but declaring
something "top-priority" because that's your opinion won't do
anything. There are many similar minor improvements that could be
made, they probably sum up to maybe 10...20 % of possible savings if
really *all* of them were sorted out (that's about the size gain I
could observe when comparing AVR-GCC 3.4.4 against IAR EW 4.10), but
that's going to be *a lot* of work.
--
cheers, J"org .-.-. --... ...-- -.. . DL8DTL
http://www.sax.de/~joerg/ NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)
- Re: [avr-gcc-list] Global variables and ISRs ???, (continued)
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Lars Noschinski, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, David Brown, 2005/09/07
- Re: [avr-gcc-list] DIV instruction (WAS: Global variables and ISRs ???), Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Alex Wenger, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, David Brown, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Joerg Wunsch, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???,
Joerg Wunsch <=
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, David Brown, 2005/09/08
- Re: [avr-gcc-list] Global variables and ISRs ???, David Brown, 2005/09/08
- Re: [avr-gcc-list] Global variables and ISRs ???, E. Weddington, 2005/09/08
- Re: [avr-gcc-list] Global variables and ISRs ???, Galen Seitz, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, ericw, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Joerg Wunsch, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Joerg Wunsch, 2005/09/07
- Re: [avr-gcc-list] Global variables and ISRs ???, Vincent Trouilliez, 2005/09/07