Path: csiph.com!news.mixmin.net!aioe.org!peer01.ams4!peer.am4.highwinds-media.com!peer02.iad!feed-me.highwinds-media.com!news.highwinds-media.com!feeder.usenetexpress.com!tr3.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!news.iecc.com!.POSTED.news.iecc.com!nerds-end From: Hans-Peter Diettrich Newsgroups: comp.compilers Subject: Re: Bit swizzling Date: Tue, 8 Sep 2020 01:45:41 +0200 Organization: Compilers Central Lines: 12 Sender: news@iecc.com Approved: comp.compilers@iecc.com Message-ID: <20-09-022@comp.compilers> References: <20-09-014@comp.compilers> <10ab65a0-89fa-9a52-4db9-85fb2eca7ba5@gkc.org.uk> <20-09-021@comp.compilers> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Info: gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="50896"; mail-complaints-to="abuse@iecc.com" Keywords: optimize Posted-Date: 07 Sep 2020 20:57:12 EDT X-submission-address: compilers@iecc.com X-moderator-address: compilers-request@iecc.com X-FAQ-and-archives: http://compilers.iecc.com In-Reply-To: <20-09-021@comp.compilers> X-Received-Bytes: 1614 X-Received-Body-CRC: 2675609941 Xref: csiph.com comp.compilers:2593 Am 07.09.2020 um 16:55 schrieb Rick C. Hodgin: > One such idea is writing to a port, and reading back from another port, > where the external thing does the processing for you as a co-processor or > custom ASIC. In a more general approach you connect a ROM between the output and input port, for any possible mapping of n-into-n bits. Nowadays a table in flash memory is better applicable. DoDi