Compiler Specific Operators

[gwyn at BRL.ARPA]

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.