rockbox/apps/codecs/demac/libdemac/predictor-cf.S, branch master

Add codecs to librbcodec.

2012-04-25T20:13:20+00:00

Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius 
Tested-by: Nils Wallménius

Redo r28026 so that all .S files get the ASSEMBLER define.

2010-12-27T17:27:59+00:00

Patch by Thomas Jarosch.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28913 a1c6a512-1295-4272-9138-f99709370657

Fix typo from r28026 causing warnings on newer gcc.

2010-11-01T21:37:57+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28439 a1c6a512-1295-4272-9138-f99709370657

workaround weird gcc behaviour

2010-09-07T14:58:10+00:00

it might a bug in the 4 years old gcc version, but __ASSEMBLER__ is not
defined when preprocessing .S files with -std=gnu99

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28026 a1c6a512-1295-4272-9138-f99709370657

Implement mono predictor in assembler for coldfire, yielding a ~6% speedup for mono -c1000. Apply ideas gained from it back to the stereo predictor, saving 4 instructions. No speed increase for stereo, probably due to cache aliasing effects. * 80-column police.

2008-12-02T02:26:04+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19296 a1c6a512-1295-4272-9138-f99709370657

Shuffling around register allocation allows to keep decoded0 and decoded1 in registers, for a slight speedup.

2008-12-01T13:21:06+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19287 a1c6a512-1295-4272-9138-f99709370657

Branch optimisation in both C (giving hints to gcc - verified using -fprofile-arcs and gcov) and asm files. Biggest effect on coldfire (-c1000: +8%, -c2000: +5%), but ARM also profits a bit (less than 1% on ARM7TDMI, around 1% on ARM1136).

2008-11-24T18:40:49+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19199 a1c6a512-1295-4272-9138-f99709370657

Centralise compile-time configuration.

2008-11-16T17:49:37+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19121 a1c6a512-1295-4272-9138-f99709370657

Shuffle some instructions around for that extra percent of performance. Fix a bunch of comments.

2007-10-19T22:57:19+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15216 a1c6a512-1295-4272-9138-f99709370657

APE codec: Assembler optimised predictor for coldfire. Heavily based on the arm version atm, instruction reordering will probably allow for a bit more speedup soon. Speedup: -c1000: 177% -> 210%, -c2000: 135% -> 147%, -c3000: 97% -> 103%.

2007-10-19T21:35:07+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15211 a1c6a512-1295-4272-9138-f99709370657