On 7/31/07, Dirk Behme dirk.behme@googlemail.com wrote:
In lib_arm __udivsi3 and friends are available, but __udivdi3 is missing. There is a fix by modifying nand_util.c
http://sourceforge.net/mailarchive/forum.php?thread_name=468D2650.10603%40rf...
to not do any 64bit divisions any more. Now, I wonder what is the correct fix for this? Should lib_arm provide __udivdi3 as well or should nand_util.c be fixed as in above link to avoid 64bit divisions?
I can't speak for ARM, but I believe this is a problem for most architectures. In general, I think we should seriously consider moving lib_avr32/div64.c into lib_generic and start to use it for 64-bit division instead of relying on libgcc. U-Boot NG has already done this.
In this particular case, I think it's just ridiculously expensive to do _three_ 64-bit divisions just to implement a simple progress bar and they should all go away. It looks like Patrice's patch might give a bit weird results when crossing a 4G boundary but I don't see any easy way around it. Perhaps we should just drop the whole percentage complete thing and just show a nice N / M fraction?
Håvard