Mathieu Desnoyers wrote:
quoted text
> 
> Hrm, since even the nmi-safe version supports REX-prefixed instructions,
> there is no need for an =q constraint on single-byte immediate values
> anymore. (thanks to your "discard" section used in the nmi-safe version)
> 

WRONG!

Using =r for single-byte values is incorrect for 32-bit code -- that 
would permit %spl, %bpl, %sil, %dil which are illegal in 32-bit mode. 
That is not the incorrect bit, it's the description that is confused.

	-hpa
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