From patchwork Wed Jun 25 22:24:46 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Henderson X-Patchwork-Id: 1749 Received: (qmail 17395 invoked by alias); 25 Jun 2014 22:25:10 -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 17334 invoked by uid 89); 25 Jun 2014 22:25:09 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-2.4 required=5.0 tests=AWL, BAYES_00, FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM, RCVD_IN_DNSWL_LOW, SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-qc0-f177.google.com X-Received: by 10.229.65.200 with SMTP id k8mr16527659qci.4.1403735106541; Wed, 25 Jun 2014 15:25:06 -0700 (PDT) From: Richard Henderson To: libc-alpha@sourceware.org Cc: azanella@linux.vnet.ibm.com, davem@davemloft.net, marcus.shawcroft@arm.com Subject: [PATCH 6/6] aarch64: Add hp-timing.h Date: Wed, 25 Jun 2014 15:24:46 -0700 Message-Id: <1403735086-21797-7-git-send-email-rth@twiddle.net> In-Reply-To: <1403735086-21797-1-git-send-email-rth@twiddle.net> References: <1403735086-21797-1-git-send-email-rth@twiddle.net> * sysdeps/aarch64/hp-timing.h: New file. --- sysdeps/aarch64/hp-timing.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 sysdeps/aarch64/hp-timing.h diff --git a/sysdeps/aarch64/hp-timing.h b/sysdeps/aarch64/hp-timing.h new file mode 100644 index 0000000..18cb54f --- /dev/null +++ b/sysdeps/aarch64/hp-timing.h @@ -0,0 +1,38 @@ +/* High precision, low overhead timing functions. AArch64 version. + Copyright (C) 2014 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1998. + + 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 +#define _HP_TIMING_H 1 + +/* We always assume having the cycle counter register. */ +#define HP_TIMING_AVAIL (1) + +/* We indeed have inlined functions. */ +#define HP_TIMING_INLINE (1) + +/* We use 64bit values for the times. */ +typedef unsigned long long int hp_timing_t; + +/* Sync the instruction stream, and read from the virtual cycle counter. */ +#define HP_TIMING_NOW(Var) \ + __asm__ __volatile__ ("isb; mrs %0, cntvct_el0" : "=r" (Var)) + +#include + +#endif /* hp-timing.h */