From: lkcl <luke.leighton@gmail.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: Dmitry Selyutin <ghostmansd@gmail.com>, binutils@sourceware.org
Subject: Re: [PATCH] ppc/svp64: support svshape2 instruction
Date: Mon, 12 Sep 2022 11:30:00 +0100 [thread overview]
Message-ID: <CAPweEDzj19c5tDv_ywCyjLnCEeppAQy-qjony3vwEiun1RbWsQ@mail.gmail.com> (raw)
In-Reply-To: <096b4190-d6d2-0f99-3490-7eb2ab51368d@suse.com>
On Mon, Sep 12, 2022 at 7:24 AM Jan Beulich <jbeulich@suse.com> wrote:
> > +{"svshape2", SVM2(22,281), SVM2_MASK, SVP64, PPCVLE, {SVo, yx10, rmm, SVd, sk, mm}},
> The doc talks of 7 arguments, the first one being merely a 3-bit
> one (offs) with the fourth bit there instead being a separate
> "inv". Is the doc stale or the patch?
yep good catch, really appreciated jan, as Dmitry notes in a later message,
i did try adding that "inv" argument you found in
https://libre-soc.org/openpower/sv/remap/#svshape2
but backed it out fast when it reduced the range of the offset.
the offsets being 0-15 (as opposed to 0-7) is an accidental but
very useful compensator for some of the vectors otherwise being
unable to start on anything other than even-numbered boundaries.
l.
prev parent reply other threads:[~2022-09-12 10:30 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-08 18:25 Dmitry Selyutin
2022-09-08 18:34 ` Dmitry Selyutin
2022-09-08 19:03 ` lkcl
2022-09-09 9:22 ` Dmitry Selyutin
2022-09-12 6:24 ` Jan Beulich
2022-09-12 8:43 ` Dmitry Selyutin
2022-09-12 10:30 ` lkcl [this message]
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