> A third issue on the x86 is a lack of registers: There are only 6 > "general purpose" registers (and each of them actually has a specific > purpose). Eating one of these registers to maintain a pointer to > a struct vimage will be a noticable performance hit.
Why not to store it in memory? If the pointer needs to be read often, there is a high chance that it will be in CPU's data cache. Nowadays with these huge FSB frequencies reading dword from RAM won't be _much_ slower that reading it from a register anyway. IMO, experiment is req'd to see if you will win some performance be freeing a register. Or am I wrong? 03.06.2003; 21:30:43 [SorAlx] http://cydem.org.ua/ _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
