From mboxrd@z Thu Jan  1 00:00:00 1970
X-Msuck: nntp://news.gmane.org/gmane.linux.lib.musl.general/11424
Path: news.gmane.org!.POSTED!not-for-mail
From: Szabolcs Nagy <nsz@port70.net>
Newsgroups: gmane.linux.lib.musl.general
Subject: Re: [PATCH] s390x: Add single instruction math functions
Date: Sat, 10 Jun 2017 17:36:48 +0200
Message-ID: <20170610153648.GT9350@port70.net>
References: <CAGWvnynPNVY6Xgz8+S=wOtQuXFis=4eH1-523d=PvtnRbSGCUg@mail.gmail.com>
Reply-To: musl@lists.openwall.com
NNTP-Posting-Host: blaine.gmane.org
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
X-Trace: blaine.gmane.org 1497109022 13526 195.159.176.226 (10 Jun 2017 15:37:02 GMT)
X-Complaints-To: usenet@blaine.gmane.org
NNTP-Posting-Date: Sat, 10 Jun 2017 15:37:02 +0000 (UTC)
User-Agent: Mutt/1.6.0 (2016-04-01)
Cc: David Edelsohn <dje.gcc@gmail.com>
To: musl@lists.openwall.com
Original-X-From: musl-return-11437-gllmg-musl=m.gmane.org@lists.openwall.com Sat Jun 10 17:36:59 2017
Return-path: <musl-return-11437-gllmg-musl=m.gmane.org@lists.openwall.com>
Envelope-to: gllmg-musl@m.gmane.org
Original-Received: from mother.openwall.net ([195.42.179.200])
	by blaine.gmane.org with smtp (Exim 4.84_2)
	(envelope-from <musl-return-11437-gllmg-musl=m.gmane.org@lists.openwall.com>)
	id 1dJiRe-0003Fv-PD
	for gllmg-musl@m.gmane.org; Sat, 10 Jun 2017 17:36:58 +0200
Original-Received: (qmail 22426 invoked by uid 550); 10 Jun 2017 15:37:01 -0000
Mailing-List: contact musl-help@lists.openwall.com; run by ezmlm
Precedence: bulk
List-Post: <mailto:musl@lists.openwall.com>
List-Help: <mailto:musl-help@lists.openwall.com>
List-Unsubscribe: <mailto:musl-unsubscribe@lists.openwall.com>
List-Subscribe: <mailto:musl-subscribe@lists.openwall.com>
List-ID: <musl.lists.openwall.com>
Original-Received: (qmail 22380 invoked from network); 10 Jun 2017 15:37:00 -0000
Mail-Followup-To: musl@lists.openwall.com,
	David Edelsohn <dje.gcc@gmail.com>
Content-Disposition: inline
In-Reply-To: <CAGWvnynPNVY6Xgz8+S=wOtQuXFis=4eH1-523d=PvtnRbSGCUg@mail.gmail.com>
Xref: news.gmane.org gmane.linux.lib.musl.general:11424
Archived-At: <http://permalink.gmane.org/gmane.linux.lib.musl.general/11424>

* David Edelsohn <dje.gcc@gmail.com> [2017-06-09 10:51:25 -0400]:
> The following patch is a start at single instruction math functions
> for s390x architecture to increase performance.

looks good, i wonder why gcc does not have builtins support for
ceil, floor, nearbyint, round and trunc

(on aarch64 the builtins expand to single instruction with
-fno-math-errno, but on s390x they remain libc calls

at some point we plan to have some internal header to turn
math/string calls into builtins when compiling musl with gcc)