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Michael Giacomelli ae223933bf opus: ARMv5E FFT butterflies
radix-3, 4 and 5.  The gain is bookkeeping: twiddles addressed by
displacement from one base register, post-indexed stores, and C_MUL's
Q15 doubling folded into the add that consumes it.

Modelled: -4.72% ARMv5E, opus_fft_impl -25.3%.
Measured: Clip+ 30.89 -> 29.33 MHz.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Change-Id: I173667ebb13308f83bd6fcb4e876f5a56c698cd3
2026-09-24 16:33:04 -04:00
android chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
apps fix red in c6abf3382a -- iriver h1xx/h3xx simulator 2026-09-23 14:17:24 -04:00
backdrops ap80max: New hosted port 2026-08-13 17:55:06 -07:00
bootloader ipod6gboot: Silence build warning introduced in af2a3b74f4 2026-09-24 15:46:23 -04:00
docs firmware: limit system_memory_guard() to coldfire targets 2026-09-23 13:12:48 -04:00
firmware usb arc: flush both EP0 directions when SETUP replaces a transfer 2026-09-24 09:55:26 -04:00
fonts chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
icons chore: Get rid of *all* vestigal CVS '$Id:$' tags 2026-06-01 16:01:18 -04:00
lib opus: ARMv5E FFT butterflies 2026-09-24 16:33:04 -04:00
manual manual: add the iPod Nano 3G 2026-09-20 08:58:09 -04:00
packaging 3ds: Port refactor. 2026-09-01 08:39:07 -04:00
tools build: move '-mthumb-interwork' into the configure script 2026-09-19 21:18:30 -04:00
uisimulator Add "rbfs" prefix to native filesystem functions 2026-09-17 16:22:31 -04:00
utils rbutilqt/themeeditor: Fix description of KEYCHAIN_PROFILE 2026-09-22 20:47:28 -04:00
wps ap80max: New hosted port 2026-08-13 17:55:06 -07:00
.gitattributes Add a gitattributes file for the migration. 2011-12-01 14:14:59 +00:00
.gitignore misc: Update gitignore to cover a bunch of utils/* binaries 2026-06-17 13:56:29 -04:00
.gitreview misc: Add a .gitreview file for better gerrit integration 2021-06-24 07:22:19 -04:00

               __________               __   ___.
     Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
     Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
     Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
     Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
                       \/            \/     \/    \/            \/

Build Your Own Rockbox

1. Clone 'rockbox' from git (or extract a downloaded archive).

   $ git clone git://git.rockbox.org/rockbox

     or

   $ tar xJf rockbox.tar.xz

2. Create a build directory, preferably in the same directory as the firmware/
   and apps/ directories. This is where all generated files will be written.

   $ cd rockbox
   $ mkdir build
   $ cd build

3. Make sure you have mips/m68k/arm-elf-gcc and siblings in the PATH. Make sure
   that you have 'perl' in your PATH too. Your gcc cross compiler needs to be
   a particular version depending on what player you are compiling for. These
   can be generated using the rockboxdev.sh script in the /tools/ folder of the
   source.

   $ which arm-elf-eabi-gcc
   $ which perl

4. In your build directory, run the 'tools/configure' script and enter what
   target you want to build for and if you want a debug version or not (and a
   few more questions). It'll prompt you. The debug version is for making a
   gdb version out of it. It is only useful if you run gdb towards your target
   Archos.

   $ ../tools/configure

5. *ploink*. Now you have got a Makefile generated for you.

6. Run 'make' and soon the necessary pieces from the firmware and the apps
   directories have been compiled, linked and scrambled for you.

   $ make
   $ make zip

7. unzip the rockbox.zip on your music player, reboot it and
   *smile*.

If you want to build for more than one target, just create several build
directories and create a setup for each target:

   $ mkdir build-fuzeplus
   $ cd build-fuzeplus
   $ ../tools/configure

   $ mkdir build-xduoox3
   $ cd build-xduoox3
   $ ../tools/configure

Questions anyone? Ask on the mailing list or on IRC. We'll be happy to help you!