Author: Gerd Isenberg
Date: 00:38:42 05/10/05
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On May 09, 2005 at 14:36:42, Steven Edwards wrote: >On May 09, 2005 at 10:19:23, Gerd Isenberg wrote: >>On May 09, 2005 at 07:48:51, Steven Edwards wrote: > >>May be a bit pedantic to save a subtract and to shift INT_MIN logical right ;-) >> >> myDwrdVec[0] ^= (unsigned)(1<<31) >> theZC; // >>> >>instead of >> myDwrdVec[0] ^= 1 << (31 - theZC); > >I've tried that and the resulting code is sligtly slower by about 1.5%. Funny - i'm not familar with PPC assembly, probably due to loading a sign extented constant. Otherwise, i would say some "random" effects ;-)
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