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From: gwyn@BRL.ARPA
Newsgroups: net.lang.c
Subject: Re:  Compiler Specific Operators
Message-ID: <2149@brl-smoke.ARPA>
Date: Sat, 12-Jul-86 08:18:35 EDT
Article-I.D.: brl-smok.2149
Posted: Sat Jul 12 08:18:35 1986
Date-Received: Sun, 13-Jul-86 06:57:26 EDT
Sender: news@brl-smoke.ARPA
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What most implementations that support such machine-specific operations
do is have the compiler recognize apparent function names and generate
the appropriate machine-specific code instead of a function call.  E.g.
	_rol( a, b );	/* generates code to rotate a left b bits */
This approach has the advantage of fitting into the existing language
syntax, so that other tools for dealing with C (lint, ctrace, cxref,
cpp, etc.) aren't affected.