From patchwork Tue Oct 17 20:16:50 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joseph Myers X-Patchwork-Id: 23651 Received: (qmail 90489 invoked by alias); 17 Oct 2017 20:16:59 -0000 Mailing-List: contact libc-alpha-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: libc-alpha-owner@sourceware.org Delivered-To: mailing list libc-alpha@sourceware.org Received: (qmail 90472 invoked by uid 89); 17 Oct 2017 20:16:59 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-24.5 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, RCVD_IN_DNSWL_NONE, SPF_PASS, URIBL_RED autolearn=ham version=3.3.2 spammy= X-HELO: relay1.mentorg.com Date: Tue, 17 Oct 2017 20:16:50 +0000 From: Joseph Myers To: Subject: Use __f128 to define FLT128_* constants in include/float.h for old GCC [committed] Message-ID: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 X-ClientProxiedBy: svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) To svr-ies-mbx-01.mgc.mentorg.com (139.181.222.1) When using compilers before GCC 7, include/float.h provides fallback definitions of FLT128_* constants. These definitions use 'Q' constant suffixes, which works for configurations with _Float128 ABI-distinct from long double, but not where it has the same ABI as long double. This patch changes the definitions to use the __f128 macro from , so allowing them to work in the non-distinct _Float128 case (where they are used in building glibc tests, not for building glibc itself) as well. Tested (a) with build-many-glibcs.py with GCC 6 (installed stripped shared libraries unchanged by the patch); (b) with build-many-glibcs.py with GCC 6 together with the main patch to enable float128 aliases; (c) for x86_64 with both GCC 6 and GCC 7. Committed. 2017-10-17 Joseph Myers * include/float.h [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MAX): Define using __f128. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_EPSILON): Likewise. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_MIN): Likewise. [!__GNUC_PREREQ (7, 0) && __HAVE_FLOAT128 && __GLIBC_USE (IEC_60559_TYPES_EXT)] (FLT128_TRUE_MIN): Likewise. diff --git a/include/float.h b/include/float.h index 736868f..939c83d 100644 --- a/include/float.h +++ b/include/float.h @@ -24,10 +24,14 @@ # define FLT128_MIN_10_EXP (-4931) # define FLT128_MAX_EXP 16384 # define FLT128_MAX_10_EXP 4932 -# define FLT128_MAX 1.18973149535723176508575932662800702e+4932Q -# define FLT128_EPSILON 1.92592994438723585305597794258492732e-34Q -# define FLT128_MIN 3.36210314311209350626267781732175260e-4932Q -# define FLT128_TRUE_MIN 6.47517511943802511092443895822764655e-4966Q +# define FLT128_MAX \ + __f128 (1.18973149535723176508575932662800702e+4932) +# define FLT128_EPSILON \ + __f128 (1.92592994438723585305597794258492732e-34) +# define FLT128_MIN \ + __f128 (3.36210314311209350626267781732175260e-4932) +# define FLT128_TRUE_MIN \ + __f128 (6.47517511943802511092443895822764655e-4966) #endif #endif /* _LIBC_FLOAT_H */