17 Sep
2002
17 Sep
'02
12:58 p.m.
On Tue, Sep 17, 2002 at 04:07:58 +0200, Tim Goetze wrote:
unfortunately there's nothing in
http://gcc.gnu.org/gcc-3.0/features.html that would suggest this.
http://gcc.gnu.org/gcc-3.1/changes.html -mmmx -m3dnow etc. It can;t
vectgorise (by the sound of it) but it can do substituion and presumably
handle the register shifts?
applying static gain seems to be a good candidate for
SIMD even if
there's only one channel. needs some additional logic if buffers
Yes, also the normalised float -> integer conversion that is done in eg.
jacks output loop. It could be made branchless (and vectorised, unless you
are dithering).
with the need for [f]emms and gcc's crude inline
assembly syntax, it
seems very desirable to isolate vectorized routines into .s sources
to me.
Maybe, I've not done any serious inline assembler code in gcc. I'd be
interested in mucking in on a library of accelerated functions though,
it's an area I want to know more about.
- Steve