rockbox/firmware/target/arm/ipod/lcd-as-gray.S, branch master

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

Fix byte order for Mini G2, and fix comments.

2010-06-07T21:16:59+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26675 a1c6a512-1295-4272-9138-f99709370657

Smaller & faster grey blitting on greyscale ipods, based on an idea by Mike Sevakis. ISR speedup on all greyscale iPods except Mini 2nd Gen is ~10%. No speedup on the latter, because the serial transfer is the limiting factor.

2010-05-30T22:24:50+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26422 a1c6a512-1295-4272-9138-f99709370657

ARM asm LCD and ATA driver functions: Don't save r12 as it is a scratch reg. Saves a bit of stack and execution time.

2009-07-11T23:43:44+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21795 a1c6a512-1295-4272-9138-f99709370657

Updated our source code header to explicitly mention that we are GPL v2 or

2008-06-28T18:10:04+00:00

later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657

Stop saving more registers than necessary.

2008-03-28T18:56:50+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16866 a1c6a512-1295-4272-9138-f99709370657

Some cleanup for readability. No code change.

2008-01-13T13:58:18+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16076 a1c6a512-1295-4272-9138-f99709370657

Greyscale ipod lcd driver: * Assembler optimised low level functions. PP5002 targets benefit most (lcd_update() speedup >50%, and the greyscale overlay no longer makes mp3 playback skip). * Consistent brace placement style.

2008-01-12T00:59:18+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16060 a1c6a512-1295-4272-9138-f99709370657