1 files changed, 132 insertions, 0 deletions
diff --git a/src/corelib/arch/qatomic_armv6.h b/src/corelib/arch/qatomic_armv6.h
index 6eb9a7b..28655df 100644
--- a/src/corelib/arch/qatomic_armv6.h
+++ b/src/corelib/arch/qatomic_armv6.h
@@ -259,6 +259,138 @@ Q_INLINE_TEMPLATE T *QBasicAtomicPointer<T>::fetchAndAddOrdered(qptrdiff valueTo
 #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
+
+// save our pragma state and switch to ARM mode
+#pragma push
+#pragma arm
+
+inline bool QBasicAtomicInt::ref()
+{
+    register int newValue;
+    register 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()
+{
+    register int newValue;
+    register 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::testAndSetOrdered(int expectedValue, int newValue)
+{
+    register 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::fetchAndStoreOrdered(int newValue)
+{
+    register int originalValue;
+    register int result;
+    retry:
+    __asm {
+        ldrex   originalValue, [&_q_value]
+        strex   result, newValue, [&_q_value]
+        teq     result, #0
+        bne     retry
+    }
+    return originalValue;
+}
+
+inline int QBasicAtomicInt::fetchAndAddOrdered(int valueToAdd)
+{
+    register int originalValue;
+    register int newValue;
+    register 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>::testAndSetOrdered(T *expectedValue, T *newValue)
+{
+    register 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>::fetchAndStoreOrdered(T *newValue)
+{
+    register T *originalValue;
+    register 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>::fetchAndAddOrdered(qptrdiff valueToAdd)
+{
+    register T *originalValue;
+    register T *newValue;
+    register 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;
+}
+
+// go back to the previous pragma state (probably Thumb mode)
+#pragma pop
 #endif
 
 // common code