Re: [Qemu-devel] [PATCH 5/6] target-ppc: support for 32-bit carry and overflow

[Richard Henderson]

On 02/17/2017 03:47 PM, Nikunj A Dadhania wrote:
> > Why do you want to extract these bits?
>
> Convinient to copy that to XER later.

Ideally you make the most common operation cheapest, and the more rare 
operation more expensive.  That said, I suppose even using ADDO is rare in the 
first place.  So it probably doesn't much matter.


r~