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501 lines
15 KiB
501 lines
15 KiB
/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtCore module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial Usage
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Nokia.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QATOMIC_ARMV6_H
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#define QATOMIC_ARMV6_H
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
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inline bool QBasicAtomicInt::isReferenceCountingNative()
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{ return true; }
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inline bool QBasicAtomicInt::isReferenceCountingWaitFree()
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{ return false; }
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#define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE
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inline bool QBasicAtomicInt::isTestAndSetNative()
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{ return true; }
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inline bool QBasicAtomicInt::isTestAndSetWaitFree()
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{ return false; }
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#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
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inline bool QBasicAtomicInt::isFetchAndStoreNative()
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{ return true; }
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inline bool QBasicAtomicInt::isFetchAndStoreWaitFree()
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{ return false; }
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#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE
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inline bool QBasicAtomicInt::isFetchAndAddNative()
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{ return true; }
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inline bool QBasicAtomicInt::isFetchAndAddWaitFree()
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{ return false; }
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#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative()
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{ return true; }
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree()
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{ return false; }
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#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative()
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{ return true; }
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree()
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{ return false; }
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#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative()
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{ return true; }
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree()
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{ return false; }
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#ifndef Q_CC_RVCT
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inline bool QBasicAtomicInt::ref()
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{
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register int newValue;
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register int result;
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asm volatile("0:\n"
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"ldrex %[newValue], [%[_q_value]]\n"
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"add %[newValue], %[newValue], #1\n"
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"strex %[result], %[newValue], [%[_q_value]]\n"
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"teq %[result], #0\n"
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"bne 0b\n"
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: [newValue] "=&r" (newValue),
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[result] "=&r" (result),
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"+m" (_q_value)
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: [_q_value] "r" (&_q_value)
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: "cc", "memory");
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return newValue != 0;
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}
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inline bool QBasicAtomicInt::deref()
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{
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register int newValue;
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register int result;
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asm volatile("0:\n"
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"ldrex %[newValue], [%[_q_value]]\n"
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"sub %[newValue], %[newValue], #1\n"
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"strex %[result], %[newValue], [%[_q_value]]\n"
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"teq %[result], #0\n"
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"bne 0b\n"
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: [newValue] "=&r" (newValue),
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[result] "=&r" (result),
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"+m" (_q_value)
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: [_q_value] "r" (&_q_value)
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: "cc", "memory");
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return newValue != 0;
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}
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inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
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{
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register int result;
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asm volatile("0:\n"
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"ldrex %[result], [%[_q_value]]\n"
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"eors %[result], %[result], %[expectedValue]\n"
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"strexeq %[result], %[newValue], [%[_q_value]]\n"
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"teqeq %[result], #1\n"
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"beq 0b\n"
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: [result] "=&r" (result),
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"+m" (_q_value)
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: [expectedValue] "r" (expectedValue),
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[newValue] "r" (newValue),
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[_q_value] "r" (&_q_value)
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: "cc", "memory");
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return result == 0;
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}
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inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
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{
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register int originalValue;
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register int result;
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asm volatile("0:\n"
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"ldrex %[originalValue], [%[_q_value]]\n"
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"strex %[result], %[newValue], [%[_q_value]]\n"
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"teq %[result], #0\n"
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"bne 0b\n"
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: [originalValue] "=&r" (originalValue),
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[result] "=&r" (result),
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"+m" (_q_value)
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: [newValue] "r" (newValue),
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[_q_value] "r" (&_q_value)
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: "cc", "memory");
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return originalValue;
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}
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inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
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{
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register int originalValue;
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register int newValue;
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register int result;
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asm volatile("0:\n"
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"ldrex %[originalValue], [%[_q_value]]\n"
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"add %[newValue], %[originalValue], %[valueToAdd]\n"
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"strex %[result], %[newValue], [%[_q_value]]\n"
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"teq %[result], #0\n"
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"bne 0b\n"
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: [originalValue] "=&r" (originalValue),
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[newValue] "=&r" (newValue),
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[result] "=&r" (result),
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"+m" (_q_value)
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: [valueToAdd] "r" (valueToAdd),
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[_q_value] "r" (&_q_value)
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: "cc", "memory");
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return originalValue;
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
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{
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register T *result;
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asm volatile("0:\n"
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"ldrex %[result], [%[_q_value]]\n"
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"eors %[result], %[result], %[expectedValue]\n"
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"strexeq %[result], %[newValue], [%[_q_value]]\n"
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"teqeq %[result], #1\n"
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"beq 0b\n"
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: [result] "=&r" (result),
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"+m" (_q_value)
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: [expectedValue] "r" (expectedValue),
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[newValue] "r" (newValue),
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[_q_value] "r" (&_q_value)
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: "cc", "memory");
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return result == 0;
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
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{
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register T *originalValue;
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register int result;
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asm volatile("0:\n"
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"ldrex %[originalValue], [%[_q_value]]\n"
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"strex %[result], %[newValue], [%[_q_value]]\n"
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"teq %[result], #0\n"
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"bne 0b\n"
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: [originalValue] "=&r" (originalValue),
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[result] "=&r" (result),
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"+m" (_q_value)
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: [newValue] "r" (newValue),
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[_q_value] "r" (&_q_value)
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: "cc", "memory");
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return originalValue;
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
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{
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register T *originalValue;
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register T *newValue;
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register int result;
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asm volatile("0:\n"
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"ldrex %[originalValue], [%[_q_value]]\n"
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"add %[newValue], %[originalValue], %[valueToAdd]\n"
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"strex %[result], %[newValue], [%[_q_value]]\n"
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"teq %[result], #0\n"
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"bne 0b\n"
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: [originalValue] "=&r" (originalValue),
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[newValue] "=&r" (newValue),
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[result] "=&r" (result),
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"+m" (_q_value)
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: [valueToAdd] "r" (valueToAdd * sizeof(T)),
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[_q_value] "r" (&_q_value)
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: "cc", "memory");
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return originalValue;
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}
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#else
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// This is Q_CC_RVCT
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// RVCT inline assembly documentation:
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// http://www.keil.com/support/man/docs/armcc/armcc_chdcffdb.htm
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// RVCT embedded assembly documentation:
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// http://www.keil.com/support/man/docs/armcc/armcc_chddbeib.htm
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// save our pragma state and switch to ARM mode
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#pragma push
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#pragma arm
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inline bool QBasicAtomicInt::ref()
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{
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register int newValue;
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register int result;
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retry:
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__asm {
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ldrex newValue, [&_q_value]
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add newValue, newValue, #1
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strex result, newValue, [&_q_value]
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teq result, #0
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bne retry
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}
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return newValue != 0;
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}
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inline bool QBasicAtomicInt::deref()
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{
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register int newValue;
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register int result;
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retry:
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__asm {
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ldrex newValue, [&_q_value]
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sub newValue, newValue, #1
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strex result, newValue, [&_q_value]
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teq result, #0
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bne retry
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}
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return newValue != 0;
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}
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inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue)
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{
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register int result;
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retry:
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__asm {
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ldrex result, [&_q_value]
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eors result, result, expectedValue
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strexeq result, newValue, [&_q_value]
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teqeq result, #1
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beq retry
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}
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return result == 0;
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}
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inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue)
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{
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register int originalValue;
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register int result;
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retry:
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__asm {
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ldrex originalValue, [&_q_value]
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strex result, newValue, [&_q_value]
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teq result, #0
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bne retry
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}
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return originalValue;
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}
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inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
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{
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register int originalValue;
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register int newValue;
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register int result;
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retry:
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__asm {
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ldrex originalValue, [&_q_value]
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add newValue, originalValue, valueToAdd
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strex result, newValue, [&_q_value]
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teq result, #0
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bne retry
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}
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return originalValue;
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue)
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{
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register T *result;
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retry:
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__asm {
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ldrex result, [&_q_value]
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eors result, result, expectedValue
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strexeq result, newValue, [&_q_value]
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teqeq result, #1
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beq retry
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}
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return result == 0;
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue)
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{
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register T *originalValue;
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register int result;
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retry:
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__asm {
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ldrex originalValue, [&_q_value]
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strex result, newValue, [&_q_value]
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teq result, #0
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bne retry
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}
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return originalValue;
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd)
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{
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register T *originalValue;
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register T *newValue;
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register int result;
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retry:
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__asm {
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ldrex originalValue, [&_q_value]
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add newValue, originalValue, valueToAdd * sizeof(T)
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strex result, newValue, [&_q_value]
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teq result, #0
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bne retry
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}
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return originalValue;
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}
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// go back to the previous pragma state (probably Thumb mode)
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#pragma pop
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#endif
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// common code
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inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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inline bool QBasicAtomicInt::testAndSetAcquire(int expectedValue, int newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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inline bool QBasicAtomicInt::testAndSetRelease(int expectedValue, int newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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inline int QBasicAtomicInt::fetchAndStoreAcquire(int newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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inline int QBasicAtomicInt::fetchAndStoreRelease(int newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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inline int QBasicAtomicInt::fetchAndAddAcquire(int valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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inline int QBasicAtomicInt::fetchAndAddRelease(int valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetAcquire(T *expectedValue, T *newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelease(T *expectedValue, T *newValue)
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{
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return testAndSetOrdered(expectedValue, newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreAcquire(T *newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelease(T *newValue)
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{
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return fetchAndStoreOrdered(newValue);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddAcquire(qptrdiff valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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template <typename T>
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Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelease(qptrdiff valueToAdd)
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{
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return fetchAndAddOrdered(valueToAdd);
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}
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QATOMIC_ARMV6_H
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