From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 4C0523858D32; Sun, 5 Mar 2023 12:11:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4C0523858D32 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1678018279; bh=hiv0XekdFrg45KnDcqPOY0bQdhN1lhvIy3GKJaE34UA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=dygiQY7s9iYE/rgU5/7Zz95YxGv6QcYPVKpmqtK/EWs2SVsN1zzZxfQb/MC5s3Yp5 wjxDM6JNWaRsaiee5khV9vdMbfGakrlxUOh74UzHCR0xR9i+7Pbnt/l5sO9ojvWilS J1P/POgCY45r+VbXZBqS11WRkXKlRutigJNGcoY0= From: "g.peterhoff@t-online.de" To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/109029] std::signbit(double) generiert sehr ineffizienten code Date: Sun, 05 Mar 2023 12:11:19 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c++ X-Bugzilla-Version: unknown X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: g.peterhoff@t-online.de X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109029 --- Comment #1 from g.peterhoff@t-online.de --- Ok in english std::signbit(double) generates very inefficient code and thus cannot be vectorized (https://godbolt.org/z/se6Ea8bo9).=