From owner-svn-src-stable@freebsd.org Sun Feb 24 20:15:17 2019 Return-Path: Delivered-To: svn-src-stable@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 630071509F6A; Sun, 24 Feb 2019 20:15:17 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id A995985053; Sun, 24 Feb 2019 20:15:16 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 9C3AFA51D; Sun, 24 Feb 2019 20:15:16 +0000 (UTC) (envelope-from jhibbits@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id x1OKFGqV014819; Sun, 24 Feb 2019 20:15:16 GMT (envelope-from jhibbits@FreeBSD.org) Received: (from jhibbits@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id x1OKFGE6014818; Sun, 24 Feb 2019 20:15:16 GMT (envelope-from jhibbits@FreeBSD.org) Message-Id: <201902242015.x1OKFGE6014818@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhibbits set sender to jhibbits@FreeBSD.org using -f From: Justin Hibbits Date: Sun, 24 Feb 2019 20:15:16 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r344496 - stable/12/sys/powerpc/fpu X-SVN-Group: stable-12 X-SVN-Commit-Author: jhibbits X-SVN-Commit-Paths: stable/12/sys/powerpc/fpu X-SVN-Commit-Revision: 344496 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: A995985053 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.94 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-0.99)[-0.995,0]; NEURAL_HAM_SHORT(-0.94)[-0.944,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US]; NEURAL_HAM_LONG(-1.00)[-0.999,0] X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 24 Feb 2019 20:15:17 -0000 Author: jhibbits Date: Sun Feb 24 20:15:16 2019 New Revision: 344496 URL: https://svnweb.freebsd.org/changeset/base/344496 Log: MFC r343078: powerpc: Fix FPU fsqrt emulation special case results If fsqrts is emulated with +INF as its argument, the 0 return value causes a NULL pointer dereference, panicking the system. Follow the PowerISA and return +INF with no FP exception. Modified: stable/12/sys/powerpc/fpu/fpu_sqrt.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/powerpc/fpu/fpu_sqrt.c ============================================================================== --- stable/12/sys/powerpc/fpu/fpu_sqrt.c Sun Feb 24 19:31:42 2019 (r344495) +++ stable/12/sys/powerpc/fpu/fpu_sqrt.c Sun Feb 24 20:15:16 2019 (r344496) @@ -226,12 +226,12 @@ fpu_sqrt(struct fpemu *fe) return (x); } if (x->fp_sign) { + fe->fe_cx |= FPSCR_VXSQRT; return (fpu_newnan(fe)); } if (ISINF(x)) { - fe->fe_cx |= FPSCR_VXSQRT; - DUMPFPN(FPE_REG, 0); - return (0); + DUMPFPN(FPE_REG, x); + return (x); } /*