From 1e4b64e36bc2993d0e942874d4ddc2f65ec4c656 Mon Sep 17 00:00:00 2001 From: mshawcroft Date: Wed, 6 Oct 2010 16:42:50 +0000 Subject: [PATCH] 2010-10-06 Marcus Shawcroft * config/linux/futex.h: New. * config/linux/arm/mutex.h: New. * configure.tgt (arm*-*-linux*): Add config path. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@165054 138bc75d-0d04-0410-961f-82ee72b054a4 --- libgomp/ChangeLog | 6 ++++ libgomp/config/linux/arm/mutex.h | 28 +++++++++++++++ libgomp/config/linux/futex.h | 75 ++++++++++++++++++++++++++++++++++++++++ libgomp/configure.tgt | 4 +++ 4 files changed, 113 insertions(+) create mode 100644 libgomp/config/linux/arm/mutex.h create mode 100644 libgomp/config/linux/futex.h diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog index 84845cbfc06..43a13fd64bc 100644 --- a/libgomp/ChangeLog +++ b/libgomp/ChangeLog @@ -1,3 +1,9 @@ +2010-10-06 Marcus Shawcroft + + * config/linux/futex.h: New. + * config/linux/arm/mutex.h: New. + * configure.tgt (arm*-*-linux*): Add config path. + 2010-09-30 Sebastian Pop * testsuite/libgomp.graphite/force-parallel-1.c: Adjust. diff --git a/libgomp/config/linux/arm/mutex.h b/libgomp/config/linux/arm/mutex.h new file mode 100644 index 00000000000..30021d54746 --- /dev/null +++ b/libgomp/config/linux/arm/mutex.h @@ -0,0 +1,28 @@ +/* Copyright (C) 2010 Free Software Foundation, Inc. + Contributed by ARM Ltd. + + This file is part of the GNU OpenMP Library (libgomp). + + Libgomp is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + Libgomp 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 General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + . */ + +/* ARM needs the same correct usage of __sync_synchronize and + __sync_lock_test_and_set as ia64. So we just use its mutex.h. */ + +#include "config/linux/ia64/mutex.h" diff --git a/libgomp/config/linux/futex.h b/libgomp/config/linux/futex.h new file mode 100644 index 00000000000..7324b78383e --- /dev/null +++ b/libgomp/config/linux/futex.h @@ -0,0 +1,75 @@ +/* Copyright (C) 2010 Free Software Foundation, Inc. + Contributed by ARM Ltd. + + This file is part of the GNU OpenMP Library (libgomp). + + Libgomp is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + Libgomp 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 General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + . */ + +/* Provide target-specific access to the futex system call. */ + +/* The include file hierachy above us (wait.h) has pushed visibility + hidden, this will be applied to prototypes with headers we include + with the effect that we cannot link against an external function + (syscall). The solution here is to push default visibility, include + our required headers then reinstante the original visibility. */ + +#pragma GCC visibility push(default) + +#define _GNU_SOURCE +#include +#include + +#pragma GCC visibility pop + +static inline void +futex_wait (int *addr, int val) +{ + long err = syscall (SYS_futex, addr, gomp_futex_wait, val); + if (__builtin_expect (err == -ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + syscall (SYS_futex, addr, gomp_futex_wait, val); + } +} + +static inline void +futex_wake (int *addr, int count) +{ + long err = syscall (SYS_futex, addr, gomp_futex_wake, count); + if (__builtin_expect (err == -ENOSYS, 0)) + { + gomp_futex_wait &= ~FUTEX_PRIVATE_FLAG; + gomp_futex_wake &= ~FUTEX_PRIVATE_FLAG; + syscall (SYS_futex, addr, gomp_futex_wake, count); + } +} + +static inline void +cpu_relax (void) +{ + __asm volatile ("" : : : "memory"); +} + +static inline void +atomic_write_barrier (void) +{ + __sync_synchronize (); +} diff --git a/libgomp/configure.tgt b/libgomp/configure.tgt index 16bb888862e..6ab9e4d9141 100644 --- a/libgomp/configure.tgt +++ b/libgomp/configure.tgt @@ -31,6 +31,10 @@ if test $enable_linux_futex = yes; then config_path="linux/alpha linux posix" ;; + arm*-*-linux*) + config_path="linux/arm linux posix" + ;; + ia64*-*-linux*) config_path="linux/ia64 linux posix" ;; -- 2.11.4.GIT