Re: nasm over gas?

[insecure <insecure@mail.od.ua>]

On Thursday 11 September 2003 14:07, Ricardo Bugalho wrote:
> On Wed, 10 Sep 2003 00:34:57 +0300, insecure wrote:
> > That instruction is in main() initialization sequence. I.e. it is
> > executed once per program invocation. Summary: we lost 8 bytes for no
> > gain. There's not even a speed gain - we lost 8 bytes of _icache_, that
> > will bite us somewhere else.
>
> You're quite right, but the I-Cache is a non issue: this code will be

Please disable icache on your CPU ;)

> evicted when there is need to put something else. And because its only run
> once at the beginning of the program, it won't cause anything important to
> be evicted.

How can you know that it won't evict useful code?

> You can complain about the time it gets to fetch the code from
> RAM though.

Thanks for the tip. I missed that!

> Quoting another post from you: "I do _not_ advocate using asm anywhere
> except speed critical code."
> This code is obviously not critical. So, it makes a bad choice for
> discussion.

It makes perfectly fine point that gcc code is not good.
It just wasted 8 bytes in a rather simple code sequence.
-- 
vda