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From: thomas@kuling.UUCP (Thomas H{meenaho)
Newsgroups: net.lang.c
Subject: Re:  Two Birds with One Stone
Message-ID: <864@kuling.UUCP>
Date: Fri, 20-Dec-85 21:34:44 EST
Article-I.D.: kuling.864
Posted: Fri Dec 20 21:34:44 1985
Date-Received: Mon, 23-Dec-85 04:37:00 EST
References: <874@dataioDataio.UUCP>
Reply-To: thomas@kuling.UUCP (Thomas H{meenaho)
Organization: The Royal Inst. of Techn., Stockholm
Lines: 12

In article <874@dataioDataio.UUCP> bright@dataio.UUCP (Walter Bright writes:
>Almost but not quite true. A compiler CANNOT normally replace a divide
>by a right-shift if it is an integer divide. This is because a right
>shift of a negative integer is not the same as a divide.


However most useable processors provide arithmetic shifts which will give
the right result even if it is a signed divide.
-- 
Thomas Hameenaho, Dept. of Computer Science, Uppsala University, Sweden
Phone: +46 18 138650
UUCP: thomas@kuling.UUCP (...!{seismo,mcvax}!enea!kuling!thomas)