rockbox/apps/recorder/jpeg_idct_arm.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 a typo in jpeg_idct8h which could cause display corruption on ARMv5+

2009-08-31T21:46:31+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22577 a1c6a512-1295-4272-9138-f99709370657

Remove ldrd from ARMv5 JPEG IDCT, remove old debug code selecting ARMv5 code for one function even when building for ARMv6.

2009-07-17T09:20:58+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21917 a1c6a512-1295-4272-9138-f99709370657

Add new asmdefs mechanism for exporting information only available to the C compiler for use in asm files, and use it in arm jpeg idct. See apps/apps.make, apps/core_asmdefs.c, and apps/recorder/jpeg_idct_arm.S for details.

2009-07-13T00:40:35+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21831 a1c6a512-1295-4272-9138-f99709370657

JPEG IDCT8 ARMv6 assembly, slight speedup vs ARMv5.

2009-07-03T10:03:17+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21620 a1c6a512-1295-4272-9138-f99709370657

Core JPEG IDCT8 optimizations for ARMv5+, small optimizations for ARMv4.

2009-07-02T09:57:03+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21612 a1c6a512-1295-4272-9138-f99709370657

Use hand-written constants table on ARMv5+ for JPEG IDCT, and load four 16-bit constants at a time with ldrd. Not useful for ARMv4, since one load per constant would still be needed, and limited range of ldrsh would force multiple copies of table.

2009-06-28T02:32:43+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21535 a1c6a512-1295-4272-9138-f99709370657

ARM assembly 8-point IDCT, both passes. No ARMv5/6 optimizations yet, aside from usat for final output.

2009-06-27T09:21:22+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21526 a1c6a512-1295-4272-9138-f99709370657

Fix a typo in jpeg_idct4h which caused garbled JPEGs on ARMv5.

2009-06-26T07:12:21+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21520 a1c6a512-1295-4272-9138-f99709370657

2-point and 1-point JPEG IDCT ARM assembly, remove comment in jpeg_load.c about inline asm, change loop condition to be a bit safer in case of bad values being passed.

2009-06-19T08:26:05+00:00

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21349 a1c6a512-1295-4272-9138-f99709370657