shifts and rotates by 1 on ix86

[Alan Modra]

On Wed, 10 May 2000, Richard Henderson wrote:

> On Wed, May 10, 2000 at 07:59:05PM +1000, Alan Modra wrote:
> > That's not such a bad idea, particularly if the directive also enabled 
> > warnings when someone tried to use an instruction not available on the
> > chosen cpu.
> 
> Such things are a pain for kernels.  Particularly if you
> havn't had to use them in the past.

I was thinking that until one of the .x86 pseudos was seen, gas would
behave as it currently does and not emit these warnings.

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