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- This comparison shows the changes necessary to convert path
/openrisc/trunk/gnu-stable/gcc-4.5.1/libstdc++-v3/config/cpu/ia64
- from Rev 816 to Rev 826
- ↔ Reverse comparison
Rev 816 → Rev 826
/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 |
// <http://www.gnu.org/licenses/>. |
|
#ifndef _GLIBCXX_ATOMIC_WORD_H |
#define _GLIBCXX_ATOMIC_WORD_H 1 |
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#include <bits/cxxabi_tweaks.h> |
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typedef int _Atomic_word; |
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namespace __gnu_cxx |
{ |
// 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<unsigned char *>(__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; |
} |
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// 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<unsigned char *>(__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"); |
} |
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// 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) |
} |
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#endif |
atomic_word.h
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## -0,0 +1 ##
+native
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Added: svn:keywords
## -0,0 +1 ##
+Id
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