Re: [Qemu-devel] [PATCH 00/38] tcg vector improvements

[Richard Henderson]

On 4/23/19 12:15 PM, David Hildenbrand wrote:
> On 20.04.19 09:34, Richard Henderson wrote:
>> Based-on: tcg-next, which at present is only tcg_gen_extract2.
>>
>> The dupm patches have been on list before, with a larger context
>> of supporting tcg/ppc.  The rest of the set was written to support
>> David's s390 vector patches.  In particular:
>>
>> (1) Add vector absolute value.
>> (2) Add vector shift by non-constant scalar.
>> (3) Add vector shift by vector.
>> (4) Add vector select.
> 
> Remind me, is this for VECTOR SELECT on s390x where we already added a
> vector variant? At least VECTOR SELECT on s390x works on bit, not
> element granularity.


No, this was more for implementing _vec helpers, where we can
reasonably use element granularity (since that's all x86 has).

I thought about adding a bitsel alongside cmpsel, to work on
bits like this, but haven't yet.


r~