Path: csiph.com!weretis.net!feeder6.news.weretis.net!feeder.usenetexpress.com!feeder-in1.iad1.usenetexpress.com!border1.nntp.dca1.giganews.com!nntp.giganews.com!news.iecc.com!.POSTED.news.iecc.com!nerds-end From: "Derek M. Jones" Newsgroups: comp.compilers Subject: Re: PR1ME C compiler sources Date: Thu, 26 Sep 2019 11:53:20 +0100 Organization: virginmedia.com Lines: 23 Sender: news@iecc.com Approved: comp.compilers@iecc.com Message-ID: <19-09-009@comp.compilers> References: <19-09-003@comp.compilers> <19-09-004@comp.compilers> <19-09-006@comp.compilers> <19-09-007@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="91767"; mail-complaints-to="abuse@iecc.com" Keywords: C, history, comment Posted-Date: 27 Sep 2019 01:06:51 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: <19-09-007@comp.compilers> Content-Language: en-US Xref: csiph.com comp.compilers:2360 John, > [The Prime machines suffered from having too many versions of > everything. Page 41 of that quick reference card has a 48 bit pointer > format with a bit number in the low 16 bits. It seems unlikely that a > C compiler would use that as a general pointer format since it doesn't > fit in any sort of normal int, and it's not what you'd want to point > at an int or a function or anything bigger than a char. -John] Some Cray machines and DSP chips have a similar problem with using word addressing. Several solve the problem by defining the word to be the smallest addressable unit, making chars 48-bits in the case of some DSPs. There seems to be a general dearth of PR1ME C compiler reference manuals (which wold contain the details). -- Derek M. Jones blog:shape-of-code.coding-guidelines.com [C had issues on any word addressed machine. Some of the hacks people tried on the PDP-10 were pretty ugly, too. -John]