Re: [Qemu-devel] [PATCH v2] target/arm: Vectorize USHL and SSHL

[Peter Maydell]

On Fri, 7 Jun 2019 at 16:40, Richard Henderson
<address@hidden> wrote:
>
> On 6/7/19 9:54 AM, Peter Maydell wrote:
> > On Tue, 4 Jun 2019 at 00:22, Richard Henderson
> > <address@hidden> wrote:
> >>
> >> These instructions shift left or right depending on the sign
> >> of the input, and 7 bits are significant to the shift.  This
> >> requires several masks and selects in addition to the actual
> >> shifts to form the complete answer.
> >>
> >> That said, the operation is still a small improvement even for
> >> two 64-bit elements -- 13 vector operations instead of 2 * 7
> >> integer operations.
> >>
> >> Signed-off-by: Richard Henderson <address@hidden>
> >> ---
> >
> > Applied to target-arm.next, thanks.
> >
> > NB: in v1 this series had a second patch. I'm assuming you
> > dropped it deliberately -- if not, let me know.
>
> Oops, no.  Can you please grab it with your r-b from v1?

Sure.

-- PMM