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Re: [PATCH v2] x86emul/test: encourage compiler to use more embedded broadcast
- To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>
- Date: Thu, 9 Jun 2022 15:54:51 +0000
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- Thread-topic: [PATCH v2] x86emul/test: encourage compiler to use more embedded broadcast
On 09/06/2022 16:35, Jan Beulich wrote:
> For one it was an oversight to leave dup_{hi,lo}() undefined for 512-bit
> vector size. And then in FMA testing we can also arrange for the
> compiler to (hopefully) recognize broadcasting potential. Plus we can
> replace the broadcast(1) use in the addsub() surrogate with inline
> assembly explicitly using embedded broadcast (even gcc12 still doesn't
> support broadcast for any of the addsub/subadd builtins).
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
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