Date: Thu, 1 Nov 2007 01:34:46 +0300 From: Andrey Chernov <ache@nagual.pp.ru> To: Juli Mallett <juli@clockworksquid.com> Cc: cvs-src@FreeBSD.ORG, src-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/include _ctype.h Message-ID: <20071031223446.GA90994@nagual.pp.ru> In-Reply-To: <20071030200331.GA29309@toxic.magnesium.net> References: <200710272232.l9RMWSbK072082@repoman.freebsd.org> <20071030200331.GA29309@toxic.magnesium.net>
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On Tue, Oct 30, 2007 at 10:03:31AM -1000, Juli Mallett wrote: > Is there a specific expensive instruction you're trying to avoid? > For such thoroughyl bit-aligned range checks, you shouldn't even get a branch > for the former case. Is there a platform other than i386 I should look at where > the previous expression is more clearly pessimized? Or a different compiler > than GCC? Besides optimizing the case when no optimization used in compiler for some reason, the next reason is to keep ctype in its style, i.e. ressemble isascii() there. -- http://ache.pp.ru/
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