rockbox/apps/codecs/demac/libdemac/vector_math16_arm7.h, branch master My Rockbox tree Compile-time choice between 16 bit and 32 bit integers for the filters. 32 bit filters are faster on ARMv4 (with assembler code), so use them there. Nice speedup on PP and Gigabeat F/X. 2008-11-19T00:34:48+00:00 Jens Arnold amiconn@rockbox.org 2008-11-19T00:34:48+00:00 77934cbc961a69e7d18588276f0e64a692854125 git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19140 a1c6a512-1295-4272-9138-f99709370657 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19140 a1c6a512-1295-4272-9138-f99709370657
Tiny performance improvement for the (not yet usable) compression levels >= -c2000 on ARM7TDMI, utilizing the multiplier's early termination. 2008-11-12T09:18:36+00:00 Jens Arnold amiconn@rockbox.org 2008-11-12T09:18:36+00:00 1600e4918e45e4deb4e34dc1765c2d9ac28daf8c git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19099 a1c6a512-1295-4272-9138-f99709370657 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19099 a1c6a512-1295-4272-9138-f99709370657
Further optimised the filter vector math assembly for coldfire, and added assembly filter vector math for ARM. Both make use of the fact that the first argument of the vector functions is longword aligned. * The ARM version is tailored for ARM7TDMI, and would slow down arm9 or higher. Introduced a new CPU_ macro for ARM7TDMI. Speedup for coldfire: -c3000 104%->109%, -c4000 43%->46%, -c5000 1.7%->2.0%. Speedup for PP502x: -c2000 66%->75%, -c3000 37%->48%, -c4000 11%->18%, -c5000 2.5%->3.7% 2007-10-25T18:58:16+00:00 Jens Arnold amiconn@rockbox.org 2007-10-25T18:58:16+00:00 35f23267bfc97d070284a03e4adaa2c6b7bb6852 git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15302 a1c6a512-1295-4272-9138-f99709370657 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15302 a1c6a512-1295-4272-9138-f99709370657