optimize, but there aren't many left.
Understanding these overoptimized functions:
-As many functions, like the C ones tend to be a bit unreadable currently
-because of optimizations it is difficult to understand them (and write
-architecture specific versions, or optimize the C functions further) it is
-recommended to look at older CVS versions of the interesting files (just use
-ViewCVS at http://www1.mplayerhq.hu/cgi-bin/cvsweb.cgi/ffmpeg/?cvsroot=FFMpeg).
-Alternatively, look into the other architecture-specific versions in the i386/,
-ppc/, alpha/ subdirectories. Even if you don't exactly understand the
-instructions, it could help understanding the functions and how they
-can be optimized.
+As many functions tend to be a bit difficult to understand because
+of optimizations, it can be hard to optimize them further, or write
+architecture-specific versions. It is recommened to look at older
+revisions of the interesting files (for a web frontend try ViewVC at
+http://svn.mplayerhq.hu/ffmpeg/trunk/).
+Alternatively, look into the other architecture-specific versions in
+the i386/, ppc/, alpha/ subdirectories. Even if you don't exactly
+comprehend the instructions, it could help understanding the functions
+and how they can be optimized.
NOTE: If you still don't understand some function, ask at our mailing list!!!
-(http://www1.mplayerhq.hu/mailman/listinfo/ffmpeg-devel)
+(http://lists.mplayerhq.hu/mailman/listinfo/ffmpeg-devel)
AMD Athlon Processor x86 Code Optimization Guide:
http://www.amd.com/us-en/assets/content_type/white_papers_and_tech_docs/22007.pdf
+
+ARM-specific:
+ARM Architecture Reference Manual:
+http://www.arm.com/community/academy/resources.html
+
+Instructions timings and optimization guide for ARM9E:
+http://www.arm.com/pdfs/DDI0222B_9EJS_r1p2.pdf
+
+
GCC asm links:
official doc but quite ugly
http://gcc.gnu.org/onlinedocs/gcc/Extended-Asm.html
projects / ffmpeg / blobdiff