🚀 go-pugleaf

The Intel 486 programmer's reference manual very clearly states that
the shift operations -- except for "Shrd" and "Shld" -- always set 
the basic flags. The code:

	Mov	Ax,0
	Mov	Cl,0
	Cmp	Ax,-1		; Clear zero flag
	Shr	Ax,Cl		; Result is zero.

should leave you with the zero flag set. However, tests on my i486 
shows that this is not true. The shift is executed as a "Nop".

I would like to know how other processors respond to this piece of
code. Please try it and email the result to "terra@diku.dk" stating
the processor type, of course. Also if you have a manual for another
processor, please look up the description of the shifts. I would like
to know if there are any differences.

I will post a summary in a week or so.

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------------------------------------------Morten Welinder, terra@diku.dk