rockbox/apps/dsp_arm.S, branch master

Build librbcodec with DSP and metadata.

2012-03-18T11:00:39+00:00

All associated files are moved to /lib/rbcodec.

Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222

FS#11335 by me: make ARM assembly functions thumb-friendly

2010-06-11T04:41:36+00:00

We can't pop into pc on ARMv4t when using thumb: the T bit won't be
modified if we are returning to a thumb function
Code running on ARMv4t should use the new ldrpc / ldmpc macros instead
of ldr pc, [sp], #4 and ldm(cond) sp!, {regs, pc}
No modification on pure ARM builds and ARMv5+

Note: USE_THUMB is currently never defined, no targets can currently be
built with -mthumb, see FS#6734

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26756 a1c6a512-1295-4272-9138-f99709370657

ARM DSP: Add assembly custom sound channel processing. 13% to 14% faster than currently-used default C code on ARMv4.

2010-05-11T12:37:49+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25949 a1c6a512-1295-4272-9138-f99709370657

ARM DSP: Get an instruction out of the crossfeed main loop and improve loads and interlocks for stacked vars.

2010-05-11T10:22:23+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25946 a1c6a512-1295-4272-9138-f99709370657

ARM DSP: Remove a couple comments that no longer apply.

2010-05-11T09:30:30+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25945 a1c6a512-1295-4272-9138-f99709370657

ARM DSP: fore some reason I neglected dsp_downsample completely. Do a small reordering.

2010-05-11T09:08:26+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25944 a1c6a512-1295-4272-9138-f99709370657

ARM DSP: Make things a little more pipeline friendly. Reduce nonvolatile register stacking where possible. Routines now handle odd sample counts properly and will not over-write in that case. Remove a few pointless labels.

2010-05-11T08:40:52+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25943 a1c6a512-1295-4272-9138-f99709370657

Optimized DSP sample out functions for armv6. (For stereo output) ~9% faster than SVN asm and about 4% faster than SVN asm rearranged to observe pipeline hazards.

2010-04-25T20:04:47+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25717 a1c6a512-1295-4272-9138-f99709370657

Use r12 to save 1 register.

2010-04-11T19:08:44+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25597 a1c6a512-1295-4272-9138-f99709370657

Add arm assembler for dsp_apply_gain(). Speeds up this routine by 30-40% on PP502x.

2010-04-11T19:02:43+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25596 a1c6a512-1295-4272-9138-f99709370657