summaryrefslogtreecommitdiffstats
path: root/src/corelib/arch/qatomic_armv6.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/corelib/arch/qatomic_armv6.h')
-rw-r--r--src/corelib/arch/qatomic_armv6.h833
1 files changed, 0 insertions, 833 deletions
diff --git a/src/corelib/arch/qatomic_armv6.h b/src/corelib/arch/qatomic_armv6.h
deleted file mode 100644
index b2ea85ada2..0000000000
--- a/src/corelib/arch/qatomic_armv6.h
+++ /dev/null
@@ -1,833 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2015 The Qt Company Ltd.
-** Copyright (C) 2011 Thiago Macieira <thiago@kde.org>
-** Contact: http://www.qt.io/licensing/
-**
-** This file is part of the QtCore module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL21$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see http://www.qt.io/terms-conditions. For further
-** information use the contact form at http://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 2.1 or version 3 as published by the Free
-** Software Foundation and appearing in the file LICENSE.LGPLv21 and
-** LICENSE.LGPLv3 included in the packaging of this file. Please review the
-** following information to ensure the GNU Lesser General Public License
-** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** As a special exception, The Qt Company gives you certain additional
-** rights. These rights are described in The Qt Company LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QATOMIC_ARMV6_H
-#define QATOMIC_ARMV6_H
-
-#include <QtCore/qgenericatomic.h>
-
-QT_BEGIN_NAMESPACE
-
-#if 0
-// silence syncqt warnings
-QT_END_NAMESPACE
-#pragma qt_sync_skip_header_check
-#pragma qt_sync_stop_processing
-#endif
-
-#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT_TEST_AND_SET_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_ALWAYS_NATIVE
-
-#define Q_ATOMIC_INT32_IS_SUPPORTED
-#define Q_ATOMIC_INT32_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT32_TEST_AND_SET_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT32_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT32_FETCH_AND_ADD_IS_ALWAYS_NATIVE
-
-#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_ALWAYS_NATIVE
-
-template <int size> struct QBasicAtomicOps: QGenericAtomicOps<QBasicAtomicOps<size> >
-{
- template <typename T>
- static void orderedMemoryFence(const T &) Q_DECL_NOTHROW;
-
- static inline Q_DECL_CONSTEXPR bool isReferenceCountingNative() Q_DECL_NOTHROW { return true; }
- template <typename T> static bool ref(T &_q_value) Q_DECL_NOTHROW;
- template <typename T> static bool deref(T &_q_value) Q_DECL_NOTHROW;
-
- static inline Q_DECL_CONSTEXPR bool isTestAndSetNative() Q_DECL_NOTHROW { return true; }
- static inline Q_DECL_CONSTEXPR bool isTestAndSetWaitFree() Q_DECL_NOTHROW { return false; }
- template <typename T> static bool testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW;
- template <typename T> static bool testAndSetRelaxed(T &_q_value, T expectedValue,
- T newValue, T *currentValue) Q_DECL_NOTHROW;
-
- static inline Q_DECL_CONSTEXPR bool isFetchAndStoreNative() Q_DECL_NOTHROW { return true; }
- template <typename T> static T fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW;
-
- static inline Q_DECL_CONSTEXPR bool isFetchAndAddNative() Q_DECL_NOTHROW { return true; }
- template <typename T> static
- T fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW;
-
-private:
- template <typename T> static inline T shrinkFrom32Bit(T value);
- template <typename T> static inline T extendTo32Bit(T value);
-};
-
-template <typename T> struct QAtomicOps : QBasicAtomicOps<sizeof(T)>
-{
- // this is GCC or GCC-like, so we can use extensions:
- // force the alignment to be the size of the type, as on some ABIs the alignment
- // of 64-bit types is 32-bit. We need proper alignment for LDREX / STREX.
- typedef __attribute__((__aligned__(sizeof(T)))) T Type;
-};
-
-#ifndef Q_CC_RVCT
-
-#ifndef Q_DATA_MEMORY_BARRIER
-# define Q_DATA_MEMORY_BARRIER asm volatile("mcr p15, 0, r0, c7, c10, 5":::"memory")
-#endif
-#ifndef Q_COMPILER_MEMORY_BARRIER
-# define Q_COMPILER_MEMORY_BARRIER asm volatile("":::"memory")
-#endif
-
-template<> template<typename T> inline
-bool QBasicAtomicOps<4>::ref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrex %[newValue], [%[_q_value]]\n"
- "add %[newValue], %[newValue], #1\n"
- "strex %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<4>::deref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrex %[newValue], [%[_q_value]]\n"
- "sub %[newValue], %[newValue], #1\n"
- "strex %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<4>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW
-{
- int result;
- asm volatile("0:\n"
- "ldrex %[result], [%[_q_value]]\n"
- "eors %[result], %[result], %[expectedValue]\n"
- "itt eq\n"
- "strexeq %[result], %[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- "+m" (_q_value)
- : [expectedValue] "r" (expectedValue),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return result == 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<4>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue) Q_DECL_NOTHROW
-{
- T tempValue;
- int result;
- asm volatile("0:\n"
- "ldrex %[tempValue], [%[_q_value]]\n"
- "eors %[result], %[tempValue], %[expectedValue]\n"
- "itt eq\n"
- "strexeq %[result], %[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- [tempValue] "=&r" (tempValue),
- "+m" (_q_value)
- : [expectedValue] "r" (expectedValue),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- *currentValue = tempValue;
- return result == 0;
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<4>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
-{
- T originalValue;
- int result;
- asm volatile("0:\n"
- "ldrex %[originalValue], [%[_q_value]]\n"
- "strex %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return originalValue;
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<4>::fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrex %[originalValue], [%[_q_value]]\n"
- "add %[newValue], %[originalValue], %[valueToAdd]\n"
- "strex %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [valueToAdd] "r" (valueToAdd * QAtomicAdditiveType<T>::AddScale),
- [_q_value] "r" (&_q_value)
- : "cc");
- return originalValue;
-}
-
-#if defined(__ARM_ARCH_7__) \
- || defined(__ARM_ARCH_7A__) \
- || defined(__ARM_ARCH_7R__) \
- || defined(__ARM_ARCH_7M__) \
- || defined(__ARM_ARCH_6K__)
-// LDREXB, LDREXH and LDREXD are available on ARMv6K or higher
-
-template<> struct QAtomicOpsSupport<1> { enum { IsSupported = 1 }; };
-template<> struct QAtomicOpsSupport<2> { enum { IsSupported = 1 }; };
-template<> struct QAtomicOpsSupport<8> { enum { IsSupported = 1 }; };
-
-#define Q_ATOMIC_INT8_IS_SUPPORTED
-#define Q_ATOMIC_INT8_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT8_TEST_AND_SET_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT8_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT8_FETCH_AND_ADD_IS_ALWAYS_NATIVE
-
-#define Q_ATOMIC_INT16_IS_SUPPORTED
-#define Q_ATOMIC_INT16_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT16_TEST_AND_SET_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT16_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT16_FETCH_AND_ADD_IS_ALWAYS_NATIVE
-
-#define Q_ATOMIC_INT64_IS_SUPPORTED
-#define Q_ATOMIC_INT64_REFERENCE_COUNTING_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT64_TEST_AND_SET_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT64_FETCH_AND_STORE_IS_ALWAYS_NATIVE
-#define Q_ATOMIC_INT64_FETCH_AND_ADD_IS_ALWAYS_NATIVE
-
-// note: if T is signed, parameters are passed sign-extended in the
-// registers. However, our 8- and 16-bit operations don't do sign
-// extension. So we need to clear out the input on entry and sign-extend again
-// on exit.
-template<int Size> template <typename T>
-T QBasicAtomicOps<Size>::shrinkFrom32Bit(T value)
-{
- Q_STATIC_ASSERT(Size == 1 || Size == 2);
- if (T(-1) > T(0))
- return value; // unsigned, ABI will zero extend
- if (Size == 1)
- asm volatile("and %0, %0, %1" : "+r" (value) : "I" (0xff));
- else
- asm volatile("and %0, %0, %1" : "+r" (value) : "r" (0xffff));
- return value;
-}
-
-template<int Size> template <typename T>
-T QBasicAtomicOps<Size>::extendTo32Bit(T value)
-{
- Q_STATIC_ASSERT(Size == 1 || Size == 2);
- if (T(-1) > T(0))
- return value; // unsigned, ABI will zero extend
- if (Size == 1)
- asm volatile("sxtb %0, %0" : "+r" (value));
- else
- asm volatile("sxth %0, %0" : "+r" (value));
- return value;
-}
-
-template<> template<typename T> inline
-bool QBasicAtomicOps<1>::ref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexb %[newValue], [%[_q_value]]\n"
- "add %[newValue], %[newValue], #1\n"
- "strexb %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<1>::deref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexb %[newValue], [%[_q_value]]\n"
- "sub %[newValue], %[newValue], #1\n"
- "strexb %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<1>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW
-{
- T result;
- asm volatile("0:\n"
- "ldrexb %[result], [%[_q_value]]\n"
- "eors %[result], %[result], %[expectedValue]\n"
- "itt eq\n"
- "strexbeq %[result], %[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- "+m" (_q_value)
- : [expectedValue] "r" (shrinkFrom32Bit(expectedValue)),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return result == 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<1>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue) Q_DECL_NOTHROW
-{
- T tempValue;
- T result;
- asm volatile("0:\n"
- "ldrexb %[tempValue], [%[_q_value]]\n"
- "eors %[result], %[tempValue], %[expectedValue]\n"
- "itt eq\n"
- "strexbeq %[result], %[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- [tempValue] "=&r" (tempValue),
- "+m" (_q_value)
- : [expectedValue] "r" (shrinkFrom32Bit(expectedValue)),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- *currentValue = extendTo32Bit(tempValue);
- return result == 0;
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<1>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
-{
- T originalValue;
- int result;
- asm volatile("0:\n"
- "ldrexb %[originalValue], [%[_q_value]]\n"
- "strexb %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return extendTo32Bit(originalValue);
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<1>::fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexb %[originalValue], [%[_q_value]]\n"
- "add %[newValue], %[originalValue], %[valueToAdd]\n"
- "strexb %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [valueToAdd] "r" (valueToAdd * QAtomicAdditiveType<T>::AddScale),
- [_q_value] "r" (&_q_value)
- : "cc");
- return extendTo32Bit(originalValue);
-}
-
-template<> template<typename T> inline
-bool QBasicAtomicOps<2>::ref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexh %[newValue], [%[_q_value]]\n"
- "add %[newValue], %[newValue], #1\n"
- "strexh %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<2>::deref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexh %[newValue], [%[_q_value]]\n"
- "sub %[newValue], %[newValue], #1\n"
- "strexh %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<2>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW
-{
- T result;
- asm volatile("0:\n"
- "ldrexh %[result], [%[_q_value]]\n"
- "eors %[result], %[result], %[expectedValue]\n"
- "itt eq\n"
- "strexheq %[result], %[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- "+m" (_q_value)
- : [expectedValue] "r" (shrinkFrom32Bit(expectedValue)),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return result == 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<2>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue) Q_DECL_NOTHROW
-{
- T tempValue;
- T result;
- asm volatile("0:\n"
- "ldrexh %[tempValue], [%[_q_value]]\n"
- "eors %[result], %[tempValue], %[expectedValue]\n"
- "itt eq\n"
- "strexheq %[result], %[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- [tempValue] "=&r" (tempValue),
- "+m" (_q_value)
- : [expectedValue] "r" (shrinkFrom32Bit(expectedValue)),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- *currentValue = extendTo32Bit(tempValue);
- return result == 0;
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<2>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
-{
- T originalValue;
- int result;
- asm volatile("0:\n"
- "ldrexh %[originalValue], [%[_q_value]]\n"
- "strexh %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return extendTo32Bit(originalValue);
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<2>::fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexh %[originalValue], [%[_q_value]]\n"
- "add %[newValue], %[originalValue], %[valueToAdd]\n"
- "strexh %[result], %[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [valueToAdd] "r" (valueToAdd * QAtomicAdditiveType<T>::AddScale),
- [_q_value] "r" (&_q_value)
- : "cc");
- return extendTo32Bit(originalValue);
-}
-
-// Explanation from GCC's source code (config/arm/arm.c) on the modifiers below:
-// Whenever you use "r" (dwordVariable), you get assigned a register pair:
-// %[reg] - lower-numbered register
-// %H[reg] - higher-numbered register
-// %Q[reg] - low part of the value
-// %R[reg] - high part of the value
-// If this is a little-endian build, H and R are the same; otherwise, H and Q are the same.
-
-template<> template<typename T> inline
-bool QBasicAtomicOps<8>::ref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexd %[newValue], %H[newValue], [%[_q_value]]\n"
- "adds %Q[newValue], %Q[newValue], #1\n"
- "adc %R[newValue], %R[newValue], #0\n"
- "strexd %[result], %[newValue], %H[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<8>::deref(T &_q_value) Q_DECL_NOTHROW
-{
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexd %[newValue], %H[newValue], [%[_q_value]]\n"
- "subs %Q[newValue], %Q[newValue], #1\n"
- "sbc %R[newValue], %R[newValue], #0\n"
- "strexd %[result], %[newValue], %H[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [_q_value] "r" (&_q_value)
- : "cc", "memory");
- return newValue != 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<8>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue) Q_DECL_NOTHROW
-{
- T result;
- asm volatile("0:\n"
- "ldrexd %[result], %H[result], [%[_q_value]]\n"
- "eor %[result], %[result], %[expectedValue]\n"
- "eor %H[result], %H[result], %H[expectedValue]\n"
- "orrs %[result], %[result], %H[result]\n"
- "itt eq\n"
- "strexdeq %[result], %[newValue], %H[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- "+m" (_q_value)
- : [expectedValue] "r" (expectedValue),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return quint32(result) == 0;
-}
-
-template<> template <typename T> inline
-bool QBasicAtomicOps<8>::testAndSetRelaxed(T &_q_value, T expectedValue, T newValue, T *currentValue) Q_DECL_NOTHROW
-{
- T tempValue;
- T result;
- asm volatile("0:\n"
- "ldrexd %[tempValue], %H[tempValue], [%[_q_value]]\n"
- "eor %[result], %[tempValue], %[expectedValue]\n"
- "eor %H[result], %H[tempValue], %H[expectedValue]\n"
- "orrs %[result], %[result], %H[result]\n"
- "itt eq\n"
- "strexdeq %[result], %[newValue], %H[newValue], [%[_q_value]]\n"
- "teqeq %[result], #1\n"
- "beq 0b\n"
- : [result] "=&r" (result),
- [tempValue] "=&r" (tempValue),
- "+m" (_q_value)
- : [expectedValue] "r" (expectedValue),
- [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- *currentValue = tempValue;
- return quint32(result) == 0;
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<8>::fetchAndStoreRelaxed(T &_q_value, T newValue) Q_DECL_NOTHROW
-{
- T originalValue;
- int result;
- asm volatile("0:\n"
- "ldrexd %[originalValue], %H[originalValue], [%[_q_value]]\n"
- "strexd %[result], %[newValue], %H[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [newValue] "r" (newValue),
- [_q_value] "r" (&_q_value)
- : "cc");
- return originalValue;
-}
-
-template<> template <typename T> inline
-T QBasicAtomicOps<8>::fetchAndAddRelaxed(T &_q_value, typename QAtomicAdditiveType<T>::AdditiveT valueToAdd) Q_DECL_NOTHROW
-{
- T originalValue;
- T newValue;
- int result;
- asm volatile("0:\n"
- "ldrexd %[originalValue], %H[originalValue], [%[_q_value]]\n"
- "adds %Q[newValue], %Q[originalValue], %Q[valueToAdd]\n"
- "adc %R[newValue], %R[originalValue], %R[valueToAdd]\n"
- "strexd %[result], %[newValue], %H[newValue], [%[_q_value]]\n"
- "teq %[result], #0\n"
- "bne 0b\n"
- : [originalValue] "=&r" (originalValue),
- [newValue] "=&r" (newValue),
- [result] "=&r" (result),
- "+m" (_q_value)
- : [valueToAdd] "r" (valueToAdd * QAtomicAdditiveType<T>::AddScale),
- [_q_value] "r" (&_q_value)
- : "cc");
- return originalValue;
-}
-
-#endif
-
-#else
-// This is Q_CC_RVCT
-
-// RVCT inline assembly documentation:
-// http://www.keil.com/support/man/docs/armcc/armcc_chdcffdb.htm
-// RVCT embedded assembly documentation:
-// http://www.keil.com/support/man/docs/armcc/armcc_chddbeib.htm
-
-#if __TARGET_ARCH_THUMB-0 < 4
-// save our pragma state and switch to ARM mode (unless using Thumb2)
-# pragma push
-# pragma arm
-#endif
-
-#ifndef Q_DATA_MEMORY_BARRIER
-# define Q_DATA_MEMORY_BARRIER __schedule_barrier()
-#endif
-#ifndef Q_COMPILER_MEMORY_BARRIER
-# define Q_COMPILER_MEMORY_BARRIER __schedule_barrier()
-#endif
-
-inline bool QBasicAtomicInt::ref() Q_DECL_NOTHROW
-{
- int newValue;
- int result;
- retry:
- __asm {
- ldrex newValue, [&_q_value]
- add newValue, newValue, #1
- strex result, newValue, [&_q_value]
- teq result, #0
- bne retry
- }
- return newValue != 0;
-}
-
-inline bool QBasicAtomicInt::deref() Q_DECL_NOTHROW
-{
- int newValue;
- int result;
- retry:
- __asm {
- ldrex newValue, [&_q_value]
- sub newValue, newValue, #1
- strex result, newValue, [&_q_value]
- teq result, #0
- bne retry
- }
- return newValue != 0;
-}
-
-inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue) Q_DECL_NOTHROW
-{
- int result;
- retry:
- __asm {
- ldrex result, [&_q_value]
- eors result, result, expectedValue
- strexeq result, newValue, [&_q_value]
- teqeq result, #1
- beq retry
- }
- return result == 0;
-}
-
-inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue) Q_DECL_NOTHROW
-{
- int originalValue;
- int result;
- retry:
- __asm {
- ldrex originalValue, [&_q_value]
- strex result, newValue, [&_q_value]
- teq result, #0
- bne retry
- }
- return originalValue;
-}
-
-inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd) Q_DECL_NOTHROW
-{
- int originalValue;
- int newValue;
- int result;
- retry:
- __asm {
- ldrex originalValue, [&_q_value]
- add newValue, originalValue, valueToAdd
- strex result, newValue, [&_q_value]
- teq result, #0
- bne retry
- }
- return originalValue;
-}
-
-template <typename T>
-Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue) Q_DECL_NOTHROW
-{
- T *result;
- retry:
- __asm {
- ldrex result, [&_q_value]
- eors result, result, expectedValue
- strexeq result, newValue, [&_q_value]
- teqeq result, #1
- beq retry
- }
- return result == 0;
-}
-
-template <typename T>
-Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue) Q_DECL_NOTHROW
-{
- T *originalValue;
- int result;
- retry:
- __asm {
- ldrex originalValue, [&_q_value]
- strex result, newValue, [&_q_value]
- teq result, #0
- bne retry
- }
- return originalValue;
-}
-
-template <typename T>
-Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd) Q_DECL_NOTHROW
-{
- T *originalValue;
- T *newValue;
- int result;
- retry:
- __asm {
- ldrex originalValue, [&_q_value]
- add newValue, originalValue, valueToAdd * sizeof(T)
- strex result, newValue, [&_q_value]
- teq result, #0
- bne retry
- }
- return originalValue;
-}
-
-#if __TARGET_ARCH_THUMB-0 < 4
-# pragma pop
-#endif
-
-#endif
-
-// common code
-
-template <int size> template <typename T> inline
-void QBasicAtomicOps<size>::orderedMemoryFence(const T &) Q_DECL_NOTHROW
-{
- Q_DATA_MEMORY_BARRIER;
-}
-
-#undef Q_DATA_MEMORY_BARRIER
-#undef Q_COMPILER_MEMORY_BARRIER
-
-QT_END_NAMESPACE
-
-#endif // QATOMIC_ARMV6_H