Right shift vs. divide

[Barry Shein]

>BTW, is >> defined to be a sign-extended shift or a zero extended shift
>and under what circumstances.
>  
>                                    Paul
>                                    Schauble @ MIT-Multics

It should be controlled by the types of the things being shifted,
not the operator:

	int foo, bar ;
	unsigned int thing, stuff ;

	foo = foo >> bar ;
	thing = thing >> stuff ;

Expect the former to generate signed shift and the latter to generate
an unsigned, casts are often useful to accomplish this.

	-Barry Shein, Boston University