Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: Notesfiles $Revision: 1.7.0.10 $; site convexs
Path: utzoo!watmath!clyde!cbosgd!ihnp4!inuxc!pur-ee!uiucdcs!convex!convexs!hosking
From: hosking@convexs.UUCP
Newsgroups: net.lang.c
Subject: Re: Long Longs
Message-ID: <7000005@convexs>
Date: Sun, 2-Mar-86 18:56:00 EST
Article-I.D.: convexs.7000005
Posted: Sun Mar  2 18:56:00 1986
Date-Received: Tue, 4-Mar-86 05:05:07 EST
References: <491@faron.UUCP>
Lines: 27
Nf-ID: #R:faron.UUCP:491:convexs:7000005:000:1008
Nf-From: convexs.UUCP!hosking    Mar  2 17:56:00 1986


> Does anyone have a good solution?
>  
> Does C++ have long longs? Does anyone know of ANY language that does?
> 
>  
>  
> Bob Silverman

We ran into exactly this sort of problem with the Convex C-1.  It has 64 bit
registers, but we didn't want to make "long" be 64 bits, for a number of
reasons, including "portability" with existing code which assumed that
sizeof(long) == sizeof(int) (Argh!!), and performance impact on typical
applications.
/* Danger, Will Robinson!  Flames from hoptoad!laura approaching! */
We therefore support "short" "int" "long" and "long long" - where
sizeof(long long) == 64 bits.

You can argue that this is not portable, and I'd have to agree, but it seemed
like the best solution at the time, given that we had to get a product to
market in order to survive.  Had we been doing the C compiler as a research
project, we might very well have made different decisions.

				Doug Hosking
				Convex Computer Corp.
				Richardson, TX
				{allegra, ihnp4, uiucdcs}!convex!hosking