From patchwork Tue Sep 10 09:13:23 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Liebler X-Patchwork-Id: 34464 Received: (qmail 112527 invoked by alias); 10 Sep 2019 09:13:31 -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 112519 invoked by uid 89); 10 Sep 2019 09:13:31 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-22.7 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_SHORT, RCVD_IN_DNSWL_LOW, SPF_PASS autolearn=ham version=3.3.1 spammy=stli@linux.ibm.com, liebler, Liebler, stlilinuxibmcom X-HELO: mx0a-001b2d01.pphosted.com To: GNU C Library From: Stefan Liebler Subject: [PATCH] S390: Add support for HP_TIMING_NOW. Date: Tue, 10 Sep 2019 11:13:23 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 x-cbid: 19091009-0016-0000-0000-000002A96B79 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19091009-0017-0000-0000-00003309F160 Message-Id: <463e855f-b4bb-97ea-9f83-2fa64a9e7164@linux.ibm.com> Hi, this patch adds support for HP_TIMING_NOW if we build at least with -march=z10 -mzarch. Otherwise we are still using the generic hp-timing.h. Bye, Stefan ChangeLog: * sysdeps/s390/hp-timing.h: New file. commit 9a0d12c72043f54b7a810a5d7ee0fabdec574bb6 Author: Stefan Liebler Date: Thu Sep 5 13:37:45 2019 +0200 S390: Add support for HP_TIMING_NOW. This patch adds support for HP_TIMING_NOW if we build at least with -march=z10 -mzarch. Otherwise we are still using the generic hp-timing.h. ChangeLog: * sysdeps/s390/hp-timing.h: New file. diff --git a/sysdeps/s390/hp-timing.h b/sysdeps/s390/hp-timing.h new file mode 100644 index 0000000000..b54b8dda9b --- /dev/null +++ b/sysdeps/s390/hp-timing.h @@ -0,0 +1,42 @@ +/* High precision, low overhead timing functions. s390 version. + Copyright (C) 2019 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library. If not, see + . */ + +#ifndef _HP_TIMING_H + +/* The stckf instruction is available starting with z9-109 zarch CPUs. + As there is no extra configure check for z9-109, the z10 one is used. */ +#ifdef HAVE_S390_MIN_Z10_ZARCH_ASM_SUPPORT +# define _HP_TIMING_H 1 +# include + +/* We use 64 bit values for the times. + Note: Bit 51 is incremented every 0.000 001s = 1us. */ +typedef unsigned long long int hp_timing_t; + +# define HP_TIMING_INLINE (1) + +# define HP_TIMING_NOW(VAR) \ + do { \ + __asm__ __volatile__ ("stckf %0" : "=Q" (VAR) : : "cc"); \ + } while (0) + +#else +# include_next +#endif + +#endif /* hp-timing.h */