diff options
Diffstat (limited to 'src/corelib/arch/qatomic_arm.h')
| -rw-r--r-- | src/corelib/arch/qatomic_arm.h | 403 |
1 files changed, 24 insertions, 379 deletions
diff --git a/src/corelib/arch/qatomic_arm.h b/src/corelib/arch/qatomic_arm.h index 9df02a2..f9d71e9 100644 --- a/src/corelib/arch/qatomic_arm.h +++ b/src/corelib/arch/qatomic_arm.h @@ -44,387 +44,32 @@ QT_BEGIN_HEADER -QT_BEGIN_NAMESPACE - -#define Q_ATOMIC_INT_REFERENCE_COUNTING_IS_NOT_NATIVE - -inline bool QBasicAtomicInt::isReferenceCountingNative() -{ return false; } -inline bool QBasicAtomicInt::isReferenceCountingWaitFree() -{ return false; } - -#define Q_ATOMIC_INT_TEST_AND_SET_IS_NOT_NATIVE - -inline bool QBasicAtomicInt::isTestAndSetNative() -{ return false; } -inline bool QBasicAtomicInt::isTestAndSetWaitFree() -{ return false; } - -#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_ALWAYS_NATIVE -#define Q_ATOMIC_INT_FETCH_AND_STORE_IS_WAIT_FREE - -inline bool QBasicAtomicInt::isFetchAndStoreNative() -{ return true; } -inline bool QBasicAtomicInt::isFetchAndStoreWaitFree() -{ return true; } - -#define Q_ATOMIC_INT_FETCH_AND_ADD_IS_NOT_NATIVE - -inline bool QBasicAtomicInt::isFetchAndAddNative() -{ return false; } -inline bool QBasicAtomicInt::isFetchAndAddWaitFree() -{ return false; } - -#define Q_ATOMIC_POINTER_TEST_AND_SET_IS_NOT_NATIVE - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetNative() -{ return false; } -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isTestAndSetWaitFree() -{ return false; } - -#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_ALWAYS_NATIVE -#define Q_ATOMIC_POINTER_FETCH_AND_STORE_IS_WAIT_FREE - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreNative() -{ return true; } -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndStoreWaitFree() -{ return true; } - -#define Q_ATOMIC_POINTER_FETCH_AND_ADD_IS_NOT_NATIVE - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddNative() -{ return false; } -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::isFetchAndAddWaitFree() -{ return false; } - -#ifndef QT_NO_ARM_EABI - -// kernel places a restartable cmpxchg implementation at a fixed address -extern "C" typedef int (qt_atomic_eabi_cmpxchg_int_t)(int oldval, int newval, volatile int *ptr); -extern "C" typedef int (qt_atomic_eabi_cmpxchg_ptr_t)(void *oldval, void *newval, volatile void *ptr); -#define qt_atomic_eabi_cmpxchg_int (*reinterpret_cast<qt_atomic_eabi_cmpxchg_int_t *>(0xffff0fc0)) -#define qt_atomic_eabi_cmpxchg_ptr (*reinterpret_cast<qt_atomic_eabi_cmpxchg_ptr_t *>(0xffff0fc0)) - -#else - -extern Q_CORE_EXPORT char q_atomic_lock; -Q_CORE_EXPORT void qt_atomic_yield(int *); - -#ifdef Q_CC_RVCT - -Q_CORE_EXPORT __asm char q_atomic_swp(volatile char *ptr, char newval); - -#else - -inline char q_atomic_swp(volatile char *ptr, char newval) -{ - register char ret; - asm volatile("swpb %0,%2,[%3]" - : "=&r"(ret), "=m" (*ptr) - : "r"(newval), "r"(ptr) - : "cc", "memory"); - return ret; -} - -#endif // Q_CC_RVCT - -#endif // QT_NO_ARM_EABI - -// Reference counting - -inline bool QBasicAtomicInt::ref() -{ -#ifndef QT_NO_ARM_EABI - register int originalValue; - register int newValue; - do { - originalValue = _q_value; - newValue = originalValue + 1; - } while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0); - return newValue != 0; -#else - int count = 0; - while (q_atomic_swp(&q_atomic_lock, ~0) != 0) - qt_atomic_yield(&count); - int originalValue = _q_value++; - q_atomic_swp(&q_atomic_lock, 0); - return originalValue != -1; -#endif -} - -inline bool QBasicAtomicInt::deref() -{ -#ifndef QT_NO_ARM_EABI - register int originalValue; - register int newValue; - do { - originalValue = _q_value; - newValue = originalValue - 1; - } while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0); - return newValue != 0; -#else - int count = 0; - while (q_atomic_swp(&q_atomic_lock, ~0) != 0) - qt_atomic_yield(&count); - int originalValue = _q_value--; - q_atomic_swp(&q_atomic_lock, 0); - return originalValue != 1; -#endif -} - -// Test and set for integers - -inline bool QBasicAtomicInt::testAndSetOrdered(int expectedValue, int newValue) -{ -#ifndef QT_NO_ARM_EABI - register int originalValue; - do { - originalValue = _q_value; - if (originalValue != expectedValue) - return false; - } while (qt_atomic_eabi_cmpxchg_int(expectedValue, newValue, &_q_value) != 0); - return true; -#else - bool returnValue = false; - int count = 0; - while (q_atomic_swp(&q_atomic_lock, ~0) != 0) - qt_atomic_yield(&count); - if (_q_value == expectedValue) { - _q_value = newValue; - returnValue = true; - } - q_atomic_swp(&q_atomic_lock, 0); - return returnValue; -#endif -} - -inline bool QBasicAtomicInt::testAndSetRelaxed(int expectedValue, int newValue) -{ - return testAndSetOrdered(expectedValue, newValue); -} - -inline bool QBasicAtomicInt::testAndSetAcquire(int expectedValue, int newValue) -{ - return testAndSetOrdered(expectedValue, newValue); -} - -inline bool QBasicAtomicInt::testAndSetRelease(int expectedValue, int newValue) -{ - return testAndSetOrdered(expectedValue, newValue); -} - -// Fetch and store for integers - -#ifndef Q_CC_RVCT - -inline int QBasicAtomicInt::fetchAndStoreOrdered(int newValue) -{ - int originalValue; - asm volatile("swp %0,%2,[%3]" - : "=&r"(originalValue), "=m" (_q_value) - : "r"(newValue), "r"(&_q_value) - : "cc", "memory"); - return originalValue; -} - -#endif - -inline int QBasicAtomicInt::fetchAndStoreRelaxed(int newValue) -{ - return fetchAndStoreOrdered(newValue); -} - -inline int QBasicAtomicInt::fetchAndStoreAcquire(int newValue) -{ - return fetchAndStoreOrdered(newValue); -} - -inline int QBasicAtomicInt::fetchAndStoreRelease(int newValue) -{ - return fetchAndStoreOrdered(newValue); -} - -// Fetch and add for integers - -inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd) -{ -#ifndef QT_NO_ARM_EABI - register int originalValue; - register int newValue; - do { - originalValue = _q_value; - newValue = originalValue + valueToAdd; - } while (qt_atomic_eabi_cmpxchg_int(originalValue, newValue, &_q_value) != 0); - return originalValue; -#else - int count = 0; - while (q_atomic_swp(&q_atomic_lock, ~0) != 0) - qt_atomic_yield(&count); - int originalValue = _q_value; - _q_value += valueToAdd; - q_atomic_swp(&q_atomic_lock, 0); - return originalValue; -#endif -} - -inline int QBasicAtomicInt::fetchAndAddRelaxed(int valueToAdd) -{ - return fetchAndAddOrdered(valueToAdd); -} - -inline int QBasicAtomicInt::fetchAndAddAcquire(int valueToAdd) -{ - return fetchAndAddOrdered(valueToAdd); -} - -inline int QBasicAtomicInt::fetchAndAddRelease(int valueToAdd) -{ - return fetchAndAddOrdered(valueToAdd); -} - -// Test and set for pointers - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetOrdered(T *expectedValue, T *newValue) -{ -#ifndef QT_NO_ARM_EABI - register T *originalValue; - do { - originalValue = _q_value; - if (originalValue != expectedValue) - return false; - } while (qt_atomic_eabi_cmpxchg_ptr(expectedValue, newValue, &_q_value) != 0); - return true; +#if defined(__ARM_ARCH_7__) \ + || defined(__ARM_ARCH_7A__) \ + || defined(__ARM_ARCH_7R__) \ + || defined(__ARM_ARCH_7M__) +# define QT_ARCH_ARMV7 +QT_BEGIN_INCLUDE_HEADER +# include "QtCore/qatomic_armv7.h" +QT_END_INCLUDE_HEADER +#elif defined(__ARM_ARCH_6__) \ + || defined(__ARM_ARCH_6J__) \ + || defined(__ARM_ARCH_6T2__) \ + || defined(__ARM_ARCH_6Z__) \ + || defined(__ARM_ARCH_6K__) \ + || defined(__ARM_ARCH_6ZK__) \ + || defined(__ARM_ARCH_6M__) \ + || (__TARGET_ARCH_ARM-0 >= 6) +# define QT_ARCH_ARMV6 +QT_BEGIN_INCLUDE_HEADER +# include "QtCore/qatomic_armv6.h" +QT_END_INCLUDE_HEADER #else - bool returnValue = false; - int count = 0; - while (q_atomic_swp(&q_atomic_lock, ~0) != 0) - qt_atomic_yield(&count); - if (_q_value == expectedValue) { - _q_value = newValue; - returnValue = true; - } - q_atomic_swp(&q_atomic_lock, 0); - return returnValue; +# define QT_ARCH_ARMV5 +QT_BEGIN_INCLUDE_HEADER +# include "QtCore/qatomic_armv5.h" +QT_END_INCLUDE_HEADERS #endif -} - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelaxed(T *expectedValue, T *newValue) -{ - return testAndSetOrdered(expectedValue, newValue); -} - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetAcquire(T *expectedValue, T *newValue) -{ - return testAndSetOrdered(expectedValue, newValue); -} - -template <typename T> -Q_INLINE_TEMPLATE bool QBasicAtomicPointer<T>::testAndSetRelease(T *expectedValue, T *newValue) -{ - return testAndSetOrdered(expectedValue, newValue); -} - -// Fetch and store for pointers - -#ifdef Q_CC_RVCT - -template <typename T> -__asm T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue) -{ - add r2, pc, #0 - bx r2 - arm - swp r2,r1,[r0] - mov r0, r2 - bx lr - thumb -} - -#else - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreOrdered(T *newValue) -{ - T *originalValue; - asm volatile("swp %0,%2,[%3]" - : "=&r"(originalValue), "=m" (_q_value) - : "r"(newValue), "r"(&_q_value) - : "cc", "memory"); - return originalValue; -} - -#endif // Q_CC_RVCT - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelaxed(T *newValue) -{ - return fetchAndStoreOrdered(newValue); -} - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreAcquire(T *newValue) -{ - return fetchAndStoreOrdered(newValue); -} - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndStoreRelease(T *newValue) -{ - return fetchAndStoreOrdered(newValue); -} - -// Fetch and add for pointers - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueToAdd) -{ -#ifndef QT_NO_ARM_EABI - register T *originalValue; - register T *newValue; - do { - originalValue = _q_value; - newValue = originalValue + valueToAdd; - } while (qt_atomic_eabi_cmpxchg_ptr(originalValue, newValue, &_q_value) != 0); - return originalValue; -#else - int count = 0; - while (q_atomic_swp(&q_atomic_lock, ~0) != 0) - qt_atomic_yield(&count); - T *originalValue = (_q_value); - _q_value += valueToAdd; - q_atomic_swp(&q_atomic_lock, 0); - return originalValue; -#endif -} - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelaxed(qptrdiff valueToAdd) -{ - return fetchAndAddOrdered(valueToAdd); -} - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddAcquire(qptrdiff valueToAdd) -{ - return fetchAndAddOrdered(valueToAdd); -} - -template <typename T> -Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddRelease(qptrdiff valueToAdd) -{ - return fetchAndAddOrdered(valueToAdd); -} - -QT_END_NAMESPACE QT_END_HEADER |