On Wed, 2010-03-10 at 12:57 +0100, ext Alberto Mardegan wrote: > Kimmo Hämäläinen wrote: > > You can also put the CPU to a "fast floats" mode, see hd_fpu_set_mode() > > in > > http://maemo.gitorious.org/fremantle-hildon-desktop/hildon-desktop/blobs/master/src/main.c > > > > N900 has support for NEON instructions also. > > This sounds interesting! > > Is there any performance penalty if this switch is done often?
IIRC, there was not. Leonid Moiseichuk was testing this about a year ago, and he noticed almost 50% speed-up for floats. Notice that this affects only floats, not doubles, and that there is a small accuracy penalty. -Kimmo _______________________________________________ maemo-developers mailing list maemo-developers@maemo.org https://lists.maemo.org/mailman/listinfo/maemo-developers
