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Article #1897Re: Motorola's gcc diffs?
From: Paul Rubin
Date: Wed, 23 Dec 1992 22:49
Date: Wed, 23 Dec 1992 22:49
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In article <JEFF.92Dec23232131@dsp.sps.mot.com> jeff@dsp.sps.mot.com (Jeff Enderwick) writes: > >you will find the complete... >This version seems to work all right, but it generates illegal instruction >sequences. I was informed by Motorola that there is a post-optimizer >that is required, and that this code was not made freely available. >Although I was able to hack up a simple peephole optimizer to get rid >of the illegal instructions, the gcc code is very inefficient. >I threw the whole thing away. Perhaps Motorola worked very hard >on their optimizer and it does miraculous things. Perhaps not. This is all news to me. The post-optimizer isn't required, and it isn't based on FSF source. Jeff Enderwick jeff@dsp.sps.mot.com What does the post-optimizer do? How much does it improve the code? Thanks.
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Newsgroups: comp.dsp Path: arc1-ca.pugleaf.net!sparky!uunet!telebit!phr From: phr@telebit.com (Paul Rubin) Subject: Re: Motorola's gcc diffs? In-Reply-To: jeff@dsp.sps.mot.com's message of 23 Dec 92 23:21:31 Message-ID: <PHR.92Dec23224947@napa.telebit.com> Sender: news@telebit.com Nntp-Posting-Host: napa.telebit.com Organization: Telebit Corporation; Sunnyvale, CA, USA References: <1992Dec21.221938.14602@cheops.qld.tne.oz.au> <ANTSU.92Dec22230440@vega.utu.fi> <BzqIoE.35o@world.std.com> <JEFF.92Dec23232131@dsp.sps.mot.com> Date: 23 Dec 92 22:49:47 Lines: 19