From: GT <tnggil@protonmail.com>
To: Segher Boessenkool <segher@kernel.crashing.org>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
"dje.gcc@gmail.com" <dje.gcc@gmail.com>,
"jakub@redhat.com" <jakub@redhat.com>,
"wschmidt@linux.ibm.com" <wschmidt@linux.ibm.com>,
"tuliom@linux.ibm.com" <tuliom@linux.ibm.com>
Subject: Re: [RFC PATCH v1 1/1] PPC64: Implement POWER Architecture Vector Function ABI.
Date: Tue, 18 Aug 2020 19:14:19 +0000 [thread overview]
Message-ID: <6U0hNAH-Hsbyqz3rSo-yD6BiTkmnYDdXXWb8S_6TkfzzkrjaQYP-kj7HZYznnu_JwaR4Kp8FqLSf7PIuOSM9r6LVYJZH-1BlHS9eewBVuwk=@protonmail.com> (raw)
In-Reply-To: <20200817212835.GE28786@gate.crashing.org>
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Monday, August 17, 2020 5:28 PM, Segher Boessenkool <segher@kernel.crashing.org> wrote:
> On Mon, Aug 17, 2020 at 05:44:46PM +0000, GT wrote:
>
> > > This is about the Power binding to some OpenMP API, right? It has
> > > nothing to do with "vector" or "ABI" -- we have vectors already, and
> > > we have ABIs already, more than enough of each.
> > > It is very very VERY hard to review this without being told the proper
> > > setting here.
> >
> > What this is about:
> > David Edelsohn wanted to have new library functions, one for each of these 6 single-precision functions:
> > sinf, cosf, sincosf, expf, logf, powf; and these 6 double-precision functions:
> > sin, cos, sincos, exp, log, and pow.
> > For the single-precision functions, the corresponding new functions would compute 4 results
> > simulatneously. For the double-precision functions, the new ones would compute 2 results
> > simultaneously.
> > x86_64 has already done something very similar so I thought I would adapt as much of their
> > documentation and implementation as I could for PPC64.
> > Let's start with that. Comments so far?
>
> That sounds like libmvec?
>
> I still don't know what this is.
>
Yes, it is libmvec.
Now look at what GCC does to the code in Examples 1 and 2 at this link:
https://sourceware.org/glibc/wiki/libmvec
x86_64 added functionality to GCC so such code uses the new functions without the user
having to re-write the loops and explicitly call the new functions.
We are aiming to provide that same capability for PPC64 in GCC.
Bert.
next prev parent reply other threads:[~2020-08-18 19:14 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-07 20:35 Bert Tenjy
2020-08-07 20:59 ` Jakub Jelinek
2020-08-10 17:29 ` GT
2020-08-10 18:07 ` Jakub Jelinek
2020-08-13 20:40 ` GT
2020-08-13 21:00 ` Jakub Jelinek
2020-08-20 19:31 ` GT
2020-08-20 20:04 ` Jakub Jelinek
2020-08-20 20:29 ` Segher Boessenkool
2020-08-13 22:49 ` Segher Boessenkool
2020-08-17 17:44 ` GT
2020-08-17 21:28 ` Segher Boessenkool
2020-08-18 19:14 ` GT [this message]
2020-08-18 21:32 ` Segher Boessenkool
2020-08-20 16:19 ` GT
2020-08-20 17:48 ` Segher Boessenkool
2020-12-04 18:28 ` GT
2020-08-17 22:05 ` David Edelsohn
2020-08-17 23:06 ` Segher Boessenkool
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