From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libstdc++-v3/config/cpu/ia64/atomic_word.h | 64 ++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 libstdc++-v3/config/cpu/ia64/atomic_word.h (limited to 'libstdc++-v3/config/cpu/ia64') diff --git a/libstdc++-v3/config/cpu/ia64/atomic_word.h b/libstdc++-v3/config/cpu/ia64/atomic_word.h new file mode 100644 index 000000000..9dfbf00ec --- /dev/null +++ b/libstdc++-v3/config/cpu/ia64/atomic_word.h @@ -0,0 +1,64 @@ +// Low-level type for atomic operations -*- C++ -*- + +// Copyright (C) 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc. +// +// This file is part of the GNU ISO C++ Library. This library 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. + +// This 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 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 +// . + +#ifndef _GLIBCXX_ATOMIC_WORD_H +#define _GLIBCXX_ATOMIC_WORD_H 1 + +#include + +typedef int _Atomic_word; + +namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) +{ + // Test the first byte of __g and ensure that no loads are hoisted across + // the test. + inline bool + __test_and_acquire (__cxxabiv1::__guard *__g) + { + unsigned char __c; + unsigned char *__p = reinterpret_cast(__g); + // ldN.acq is a load with an implied hoist barrier. + // would ld8+mask be faster than just doing an ld1? + __asm __volatile ("ld1.acq %0 = %1" : "=r"(__c) : "m"(*__p) : "memory"); + return __c != 0; + } + + // Set the first byte of __g to 1 and ensure that no stores are sunk + // across the store. + inline void + __set_and_release (__cxxabiv1::__guard *__g) + { + unsigned char *__p = reinterpret_cast(__g); + // stN.rel is a store with an implied sink barrier. + // could load word, set flag, and CAS it back + __asm __volatile ("st1.rel %0 = %1" : "=m"(*__p) : "r"(1) : "memory"); + } + + // We don't define the _BARRIER macros on ia64 because the barriers are + // included in the test and set, above. +#define _GLIBCXX_GUARD_TEST_AND_ACQUIRE(G) __gnu_cxx::__test_and_acquire (G) +#define _GLIBCXX_GUARD_SET_AND_RELEASE(G) __gnu_cxx::__set_and_release (G) +} + +#endif -- cgit v1.2.3