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List:       linux-kernel
Subject:    Re: [RFC][PATCH] Faster generic_fls
From:       Linus Torvalds <torvalds () transmeta ! com>
Date:       2003-04-30 23:41:07
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On 30 Apr 2003, Alan Cox wrote:
> 
> It ought to be basically the same as ffs because if I remember rightly 
> 
> ffs(x^(x-1)) == fls(x)

So did anybody time this? ffs() we have hardware support for on x86, and 
it's even reasonably efficient on some CPU's .. So this _should_ beat all 
new-comers, and obviously some people already have benchmark programs 
ready and willing..

		Linus

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