Messages in this thread | | | Date | Mon, 25 Jul 2005 16:24:04 -0400 | From | Bill Davidsen <> | Subject | Re: xor as a lazy comparison |
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Lee Revell wrote: > On Mon, 2005-07-25 at 13:55 -0400, Steven Rostedt wrote: > >>Doesn't matter. The cycles saved for old compilers is not rational to >>have obfuscated code. > > > Where do we draw the line with this? Is x *= 2 preferable to x <<= 2 as > well?
In addition to the obvious error, let's not use x += x as well. If you want to multiple by two, do it.
Wasn't there a CPU where multiple was faster than add? Doesn't matter, let the compiler make the optimizations so you don't have to.
-- -bill davidsen (davidsen@tmr.com) "The secret to procrastination is to put things off until the last possible moment - but no longer" -me - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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