Author: Klaus Friedel
Date: 07:58:09 03/25/04
Go up one level in this thread
On March 25, 2004 at 10:06:34, Uri Blass wrote: >Today when I sort moves in movei I replace between 2 arrays of integers when one >integer is for the move and 2 other integers are for scores. > >My question is if I can do it faster than my primitive approach when I use a >third varaible: > >g = gen_dat[from]; >gen_dat[from] = gen_dat[bi]; >gen_dat[bi] = g; > >I remember that it is possible to replace 2 int's faster but I do not remember >the way to do it(I guess that it can help me to get speed improvement by simply >replacing every int in the structs gen_dat[from],gen_dat[bi] but I am not sure >about it). > >Uri It's possible to exchange the two int's without a helper variable: a ^= b; b ^= a; a ^= b; Looks strange, but should work. If a and b are structs it depends on their size. If the struct is 2 x 32 bit you might use the trick on a union definition as 64-Bit ulong. You have to try your own if it's really faster. Regards Klaus
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.