On Llu, 2004-02-23 at 16:35, Ian Romanick wrote: > Alternately, this might be a case where writing a little assembly > conversion routine would help. If we assume at least a 486 instruction > set (eh-hem!), the core of the BGR to ARGB conversion should take about > 6 or 7 instructions, including the pointer increments. It may even be > worthwhile to do an MMX optimized version. Dunno.
It should actually be hard to write one that doesnt saturate memory bandwidth. I guess prefetch instructions might help a bit. For raw memcpy the kernel prefetches about 320 bytes ahead in order for prefetch to actually kick in and be useful. For texture RGB888 is that 24bit packed or with 8bits of empty ? ------------------------------------------------------- SF.Net is sponsored by: Speed Start Your Linux Apps Now. Build and deploy apps & Web services for Linux with a free DVD software kit from IBM. Click Now! http://ads.osdn.com/?ad_id=1356&alloc_id=3438&op=click -- _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
