Path: utzoo!attcan!utgpu!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!bbn!inmet!ishmael!inmet!stt
From: stt@inmet
Newsgroups: comp.lang.c
Subject: Re: Something IBM did right (RT div
Message-ID: <124200009@inmet>
Date: 10 Nov 88 22:03:00 GMT
References: <11612@bellcore.bellcore.com>
Lines: 11
Nf-ID: #R:bellcore.bellcore.com:-1161200:inmet:124200009:000:376
Nf-From: inmet!stt    Nov 10 17:03:00 1988


The flip-side of this div = shift is to take
the route that Intel did with the 80960, and provide
an additional right shift instruction which does the same thing as
"normal" divide on negative numbers.  It is a lot
faster than divide, and always truncates toward 0.
Essentially it is a divide-by-power-of-2 instruction.

S. Tucker Taft
Intermetrics, Inc.
Cambridge, MA  02138