On Sun, Jun 25, 2023 at 9:17 AM Liu, Hongtao wrote:
>
>
>
> > -Original Message-
> > From: Jan Beulich
> > Sent: Wednesday, June 21, 2023 8:40 PM
> > To: Hongtao Liu
> > Cc: gcc-patches@gcc.gnu.org; Kirill Yukhin ; Liu,
> > Hongtao
> &
> -Original Message-
> From: Jan Beulich
> Sent: Wednesday, June 21, 2023 8:40 PM
> To: Hongtao Liu
> Cc: gcc-patches@gcc.gnu.org; Kirill Yukhin ; Liu,
> Hongtao
> Subject: Re: [PATCH v2] x86: make better use of VBROADCASTSS /
> VPBROADCASTD
>
> On 21.06
On 21.06.2023 09:44, Jan Beulich wrote:
> On 21.06.2023 09:37, Hongtao Liu wrote:
>> On Wed, Jun 21, 2023 at 2:06 PM Jan Beulich via Gcc-patches
>> wrote:
>>>
>>> Isn't prefix_extra use bogus here? What extra prefix does vbroadcastss
>> According to comments, yes, no extra prefix is needed.
>>
>>
On 21.06.2023 09:37, Hongtao Liu wrote:
> On Wed, Jun 21, 2023 at 2:06 PM Jan Beulich via Gcc-patches
> wrote:
>>
>> Is there a reason why vec_dupv4sf uses sseshuf1 for its shuffle
>> alternatives, but *vec_dupv4si uses sselog1? I'd be happy to correct
>> this in whichever is the appropriate direc
On Wed, Jun 21, 2023 at 2:06 PM Jan Beulich via Gcc-patches
wrote:
>
> ... in vec_dupv4sf / *vec_dupv4si. The respective broadcast insns are
> never longer (yet sometimes shorter) than the corresponding VSHUFPS /
> VPSHUFD, due to the immediate operand of the shuffle insns balancing the
> possible
