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From: gwyn@brl-tgr.ARPA (Doug Gwyn <gwyn>)
Newsgroups: net.lang.c
Subject: Re:  double vs single precision
Message-ID: <1335@brl-tgr.ARPA>
Date: Wed, 8-Jan-86 08:59:41 EST
Article-I.D.: brl-tgr.1335
Posted: Wed Jan  8 08:59:41 1986
Date-Received: Fri, 10-Jan-86 06:45:52 EST
References: <1333@brl-tgr.ARPA>
Organization: Ballistic Research Lab
Lines: 12

> My suggestion is to provide ANSI C with the standard pragmas
> 	#pragma float		/* force single precision */
> 	#pragma double		/* force double precision */
> that the programmer could insert above the arithmetic statement
> to specify the precision to use. These pragmas would be ignored
> on compilers that choose not to give the programmer a choice.

I think the use of #pragma for this is a good idea (I would use
"use-single-precision" or "no-single-precision" pragmas), but
the content of a #pragma should not be in the standard; it is
intended as a portable way to invoke processing that is beyond
the scope of the standard.  Pragmas are implementation-specific.