From owner-freebsd-hackers@freebsd.org Sun Sep 20 00:10:01 2020 Return-Path: Delivered-To: freebsd-hackers@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 4ADC93F39BA; Sun, 20 Sep 2020 00:10:01 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (troutmask.apl.washington.edu [128.95.76.21]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "troutmask", Issuer "troutmask" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 4Bv7HX4ZHZz3SWc; Sun, 20 Sep 2020 00:10:00 +0000 (UTC) (envelope-from sgk@troutmask.apl.washington.edu) Received: from troutmask.apl.washington.edu (localhost [127.0.0.1]) by troutmask.apl.washington.edu (8.16.1/8.16.1) with ESMTPS id 08K09wYb047845 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Sat, 19 Sep 2020 17:09:58 -0700 (PDT) (envelope-from sgk@troutmask.apl.washington.edu) Received: (from sgk@localhost) by troutmask.apl.washington.edu (8.16.1/8.16.1/Submit) id 08K09wC9047844; Sat, 19 Sep 2020 17:09:58 -0700 (PDT) (envelope-from sgk) Date: Sat, 19 Sep 2020 17:09:58 -0700 From: Steve Kargl To: freebsd-hackers@freebsd.org, freebsd-current@freebsd.org Subject: Re: [PATCH] libm -- fix expl kernels Message-ID: <20200920000958.GA47838@troutmask.apl.washington.edu> References: <20200919235849.GA47701@troutmask.apl.washington.edu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200919235849.GA47701@troutmask.apl.washington.edu> X-Rspamd-Queue-Id: 4Bv7HX4ZHZz3SWc X-Spamd-Bar: - Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=fail reason="No valid SPF, No valid DKIM" header.from=washington.edu (policy=none); spf=none (mx1.freebsd.org: domain of sgk@troutmask.apl.washington.edu has no SPF policy when checking 128.95.76.21) smtp.mailfrom=sgk@troutmask.apl.washington.edu X-Spamd-Result: default: False [-1.45 / 15.00]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; DMARC_POLICY_SOFTFAIL(0.10)[washington.edu : No valid SPF, No valid DKIM,none]; NEURAL_HAM_MEDIUM(-0.55)[-0.552]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-0.35)[-0.350]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; NEURAL_HAM_SHORT(-0.55)[-0.549]; RCPT_COUNT_TWO(0.00)[2]; R_SPF_NA(0.00)[no SPF record]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:73, ipnet:128.95.0.0/16, country:US]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-hackers,freebsd-current]; RCVD_COUNT_TWO(0.00)[2] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 20 Sep 2020 00:10:01 -0000 On Sat, Sep 19, 2020 at 04:58:49PM -0700, Steve Kargl wrote: > The following patch fixes the ld80 and ld128 kernels for expl(x). Subj: is slightly wrong. This fixes the cexpl(z) kernels. > I can't test ld128, so that patch is untested. > > . Micro-optimization: use sincosl(x) instead of a call to cosl(x) and > a call to sinl(x). Argument reduction is done once not twice. This part also fixes a cos(x) that should be cosl(x). > . Use a long double constant instead of an invalid double constant. > . Spell scale2 correctly -- Steve