From nobody Wed Oct 13 19:29:56 2021 X-Original-To: bugs@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id A430617FE47A for ; Wed, 13 Oct 2021 19:29:56 +0000 (UTC) (envelope-from bugzilla-noreply@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) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HV2fr21dLz3GDN for ; Wed, 13 Oct 2021 19:29:56 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (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 did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 0CF372D993 for ; Wed, 13 Oct 2021 19:29:56 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 19DJTtd2072257 for ; Wed, 13 Oct 2021 19:29:55 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 19DJTtpk072256 for bugs@FreeBSD.org; Wed, 13 Oct 2021 19:29:55 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 224326] double subnormals are not well printed on printing with printf (and friends) Date: Wed, 13 Oct 2021 19:29:56 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: misc X-Bugzilla-Version: 11.0-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Many People X-Bugzilla-Who: marklmi26-fbsd@yahoo.com X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: bugs@FreeBSD.org 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: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Bug reports List-Archive: https://lists.freebsd.org/archives/freebsd-bugs List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-bugs@freebsd.org MIME-Version: 1.0 X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D224326 --- Comment #8 from Mark Millard --- (In reply to Luis Colorado from comment #0) On/for armv7, for compiling/linking the test program via any of: system clang (so: 12) clang13 (from devel/llvm13) gcc11 (from lang/gcc11) and then running the test, all produce the e-308 "from here on, all are incorrect" type of results. Side note: For reference, # gcc11 -O2 -pedantic -Wall subnormal_test.c subnormal_test.c: In function 'main': subnormal_test.c:10:49: warning: dereferencing type-punned pointer will bre= ak strict-aliasing rules [-Wstrict-aliasing] 10 | printf("0x%016llx %-0.17lg\n", *(unsigned long long *)&val, val); |=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20 ^~~~~~~~~~~~~~~~~~~~~~~~~~ subnormal_test.c:10:24: warning: '0' flag ignored with '-' flag in gnu_prin= tf format [-Wformat=3D] 10 | printf("0x%016llx %-0.17lg\n", *(unsigned long long *)&val, val); | ^~~~~~~~~~~~~~~~~~~~~~ and: # clang13 -O2 -pedantic -Wall subnormal_test.c subnormal_test.c:10:23: warning: flag '0' is ignored when flag '-' is prese= nt [-Wformat] printf("0x%016llx %-0.17lg\n", *(unsigned long long *)&val, val); ~~^~~~~~ --=20 You are receiving this mail because: You are the assignee for the bug.=