ill effect of <register>+<constant>

Andreas Schwab schwab@suse.de
Fri Sep 21 16:34:00 GMT 2007


"Dave Korn" <dave.korn@artimi.com> writes:

> On 21 September 2007 16:13, Andreas Schwab wrote:
>
>> "Jan Beulich" <jbeulich@novell.com> writes:
>> 
>>> To me, adding a constant to a register and getting a different register is
>>> all but a useful feature (maybe it is in e.g. PPC semantics where registers
>>> can be represented by plain numbers). But beyond that,
>> 
>> That's the main feature.  Registers _are_ plain numbers.
>
>   I can see where that's useful on pcc, but on x86, the registers aren't
> equipotent; it makes no sense at all to me.

But it does no harm either.  So why cripple the assembler?  If you want
text replacement then use a text macro.

Andreas.

-- 
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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