| /**************************************************************************** | |
| ** | |
| ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies). | |
| ** All rights reserved. | |
| ** Contact: Nokia Corporation (qt-info@nokia.com) | |
| ** | |
| ** This file is part of the QtCore module of the Qt Toolkit. | |
| ** | |
| ** $QT_BEGIN_LICENSE:LGPL$ | |
| ** GNU Lesser General Public License Usage | |
| ** This file may be used under the terms of the GNU Lesser General Public | |
| ** License version 2.1 as published by the Free Software Foundation and | |
| ** appearing in the file LICENSE.LGPL included in the packaging of this | |
| ** file. Please review the following information to ensure the GNU Lesser | |
| ** General Public License version 2.1 requirements will be met: | |
| ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. | |
| ** | |
| ** In addition, as a special exception, Nokia gives you certain additional | |
| ** rights. These rights are described in the Nokia Qt LGPL Exception | |
| ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | |
| ** | |
| ** GNU General Public License Usage | |
| ** Alternatively, this file may be used under the terms of the GNU General | |
| ** Public License version 3.0 as published by the Free Software Foundation | |
| ** and appearing in the file LICENSE.GPL included in the packaging of this | |
| ** file. Please review the following information to ensure the GNU General | |
| ** Public License version 3.0 requirements will be met: | |
| ** http://www.gnu.org/copyleft/gpl.html. | |
| ** | |
| ** Other Usage | |
| ** Alternatively, this file may be used in accordance with the terms and | |
| ** conditions contained in a signed written agreement between you and Nokia. | |
| ** | |
| ** | |
| ** | |
| ** | |
| ** | |
| ** $QT_END_LICENSE$ | |
| ** | |
| ** This file implements the generic atomics interface using ARMv6 assembly | |
| ** instructions. It is more efficient than the inline versions when Qt is | |
| ** built for the THUMB instruction set, as the required instructions are | |
| ** only available in ARM state. | |
| ****************************************************************************/ | |
| #include <QtCore/qglobal.h> | |
| #ifdef QT_HAVE_ARMV6 | |
| #ifndef SYMBIAN_E32_ATOMIC_API | |
| QT_BEGIN_NAMESPACE | |
| QT_USE_NAMESPACE | |
| #ifdef Q_CC_RVCT | |
| #pragma push | |
| #pragma arm | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicInt_testAndSetRelaxed(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicInt_testAndSetAcquire(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicInt_testAndSetRelease(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicInt_testAndSetOrdered(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| CODE32 | |
| //R0 = _q_value | |
| //R1 = expectedValue | |
| //R2 = newValue | |
| retry_testAndSetOrdered | |
| LDREX r3,[r0] //r3 = *_q_value | |
| EORS r3,r3,r1 //if (r3 == expectedValue) { | |
| STREXEQ r3,r2,[r0] //*_q_value = newvalue, r3 = error | |
| TEQEQ r3,#1 //if error | |
| BEQ retry_testAndSetOrdered //then goto retry } | |
| RSBS r0,r3,#1 //return (r3 == 0) | |
| MOVCC r0,#0 | |
| BX r14 | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndStoreRelaxed(volatile int *_q_value, int newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndStoreAcquire(volatile int *_q_value, int newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndStoreRelease(volatile int *_q_value, int newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndStoreOrdered(volatile int *_q_value, int newValue) | |
| { | |
| CODE32 | |
| //R0 = _q_value | |
| //R1 = newValue | |
| retry_fetchAndStoreOrdered | |
| LDREX r3,[r0] //r3 = *_q_value | |
| STREX r2,r1,[r0] //*_q_value = newValue, r2 = error | |
| TEQ r2,#0 //if error | |
| BNE retry_fetchAndStoreOrdered //then goto retry | |
| MOV r0,r3 //return r3 | |
| BX r14 | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndAddRelaxed(volatile int *_q_value, int valueToAdd) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndAddAcquire(volatile int *_q_value, int valueToAdd) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndAddRelease(volatile int *_q_value, int valueToAdd) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| int QBasicAtomicInt_fetchAndAddOrdered(volatile int *_q_value, int valueToAdd) | |
| { | |
| CODE32 | |
| //R0 = _q_value | |
| //R1 = valueToAdd | |
| STMDB sp!,{r12,lr} | |
| retry_fetchAndAddOrdered | |
| LDREX r2,[r0] //r2 = *_q_value | |
| ADD r3,r2,r1 //r3 = r2 + r1 | |
| STREX r12,r3,[r0] //*_q_value = r3, r12 = error | |
| TEQ r12,#0 //if error | |
| BNE retry_fetchAndAddOrdered //then retry | |
| MOV r0,r2 //return r2 | |
| LDMIA sp!,{r12,pc} | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicPointer_testAndSetRelaxed(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicPointer_testAndSetRelease(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicPointer_testAndSetAcquire(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| bool QBasicAtomicPointer_testAndSetOrdered(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| CODE32 | |
| //R0 = _q_value | |
| //R1 = expectedValue | |
| //R2 = newValue | |
| retryPointer_testAndSetOrdered | |
| LDREX r3,[r0] //r3 = *_q_value | |
| EORS r3,r3,r1 //if (r3 == expectedValue) { | |
| STREXEQ r3,r2,[r0] //*_q_value = newvalue, r3 = error | |
| TEQEQ r3,#1 //if error | |
| BEQ retryPointer_testAndSetOrdered //then goto retry } | |
| RSBS r0,r3,#1 //return (r3 == 0) | |
| MOVCC r0,#0 | |
| BX r14 | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndStoreRelaxed(void * volatile *_q_value, void *newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndStoreAcquire(void * volatile *_q_value, void *newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndStoreRelease(void * volatile *_q_value, void *newValue) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndStoreOrdered(void * volatile *_q_value, void *newValue) | |
| { | |
| CODE32 | |
| //R0 = _q_value | |
| //R1 = newValue | |
| retryPointer_fetchAndStoreOrdered | |
| LDREX r3,[r0] //r3 = *_q_value | |
| STREX r2,r1,[r0] //*_q_value = newValue, r2 = error | |
| TEQ r2,#0 //if error | |
| BNE retryPointer_fetchAndStoreOrdered //then goto retry | |
| MOV r0,r3 //return r3 | |
| BX r14 | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndAddRelaxed(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndAddRelease(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndAddAcquire(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| CODE32 | |
| //fall through | |
| } | |
| Q_CORE_EXPORT asm | |
| void *QBasicAtomicPointer_fetchAndAddOrdered(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| CODE32 | |
| //R0 = _q_value | |
| //R1 = valueToAdd | |
| STMDB sp!,{r12,lr} | |
| retryPointer_fetchAndAddOrdered | |
| LDREX r2,[r0] //r2 = *_q_value | |
| ADD r3,r2,r1 //r3 = r2 + r1 | |
| STREX r12,r3,[r0] //*_q_value = r3, r12 = error | |
| TEQ r12,#0 //if error | |
| BNE retryPointer_fetchAndAddOrdered //then retry | |
| MOV r0,r2 //return r2 | |
| LDMIA sp!,{r12,pc} | |
| } | |
| #pragma pop | |
| #elif defined (Q_CC_GCCE) | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicInt_testAndSetRelaxed(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicInt_testAndSetAcquire(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicInt_testAndSetRelease(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicInt_testAndSetOrdered(volatile int *_q_value, int expectedValue, int newValue) | |
| { | |
| //R0 = _q_value | |
| //R1 = expectedValue | |
| //R2 = newValue | |
| asm("retry_testAndSetOrdered:"); | |
| asm(" LDREX r3,[r0]"); //r3 = *_q_value | |
| asm(" EORS r3,r3,r1"); //if (r3 == expectedValue) { | |
| asm(" STREXEQ r3,r2,[r0]"); //*_q_value = newvalue, r3 = error | |
| asm(" TEQEQ r3,#1"); //if error | |
| asm(" BEQ retry_testAndSetOrdered"); //then goto retry } | |
| asm(" RSBS r0,r3,#1"); //return (r3 == 0) | |
| asm(" MOVCC r0,#0"); | |
| asm(" BX r14"); | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndStoreRelaxed(volatile int *_q_value, int newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndStoreAcquire(volatile int *_q_value, int newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndStoreRelease(volatile int *_q_value, int newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndStoreOrdered(volatile int *_q_value, int newValue) | |
| { | |
| //R0 = _q_value | |
| //R1 = newValue | |
| asm("retry_fetchAndStoreOrdered:"); | |
| asm(" LDREX r3,[r0]"); //r3 = *_q_value | |
| asm(" STREX r2,r1,[r0]"); //*_q_value = newValue, r2 = error | |
| asm(" TEQ r2,#0"); //if error | |
| asm(" BNE retry_fetchAndStoreOrdered"); //then goto retry | |
| asm(" MOV r0,r3"); //return r3 | |
| asm(" BX r14"); | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndAddRelaxed(volatile int *_q_value, int valueToAdd) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndAddAcquire(volatile int *_q_value, int valueToAdd) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndAddRelease(volatile int *_q_value, int valueToAdd) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| int QBasicAtomicInt_fetchAndAddOrdered(volatile int *_q_value, int valueToAdd) | |
| { | |
| //R0 = _q_value | |
| //R1 = valueToAdd | |
| asm(" STMDB sp!,{r12,lr}"); | |
| asm("retry_fetchAndAddOrdered:"); | |
| asm(" LDREX r2,[r0]"); //r2 = *_q_value | |
| asm(" ADD r3,r2,r1 "); //r3 = r2 + r1 | |
| asm(" STREX r12,r3,[r0]"); //*_q_value = r3, r12 = error | |
| asm(" TEQ r12,#0"); //if error | |
| asm(" BNE retry_fetchAndAddOrdered"); //then retry | |
| asm(" MOV r0,r2"); //return r2 | |
| asm(" LDMIA sp!,{r12,pc}"); | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicPointer_testAndSetRelaxed(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicPointer_testAndSetRelease(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicPointer_testAndSetAcquire(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| bool QBasicAtomicPointer_testAndSetOrdered(void * volatile *_q_value, | |
| void *expectedValue, | |
| void *newValue) | |
| { | |
| //R0 = _q_value | |
| //R1 = expectedValue | |
| //R2 = newValue | |
| asm("retryPointer_testAndSetOrdered:"); | |
| asm(" LDREX r3,[r0]"); //r3 = *_q_value | |
| asm(" EORS r3,r3,r1"); //if (r3 == expectedValue) { | |
| asm(" STREXEQ r3,r2,[r0]"); //*_q_value = newvalue, r3 = error | |
| asm(" TEQEQ r3,#1"); //if error | |
| asm(" BEQ retryPointer_testAndSetOrdered"); //then goto retry } | |
| asm(" RSBS r0,r3,#1"); //return (r3 == 0) | |
| asm(" MOVCC r0,#0"); | |
| asm(" BX r14"); | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndStoreRelaxed(void * volatile *_q_value, void *newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndStoreAcquire(void * volatile *_q_value, void *newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndStoreRelease(void * volatile *_q_value, void *newValue) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndStoreOrdered(void * volatile *_q_value, void *newValue) | |
| { | |
| //R0 = _q_value | |
| //R1 = newValue | |
| asm("retryPointer_fetchAndStoreOrdered:"); | |
| asm(" LDREX r3,[r0]"); //r3 = *_q_value | |
| asm(" STREX r2,r1,[r0]"); //*_q_value = newValue, r2 = error | |
| asm(" TEQ r2,#0"); //if error | |
| asm(" BNE retryPointer_fetchAndStoreOrdered"); //then goto retry | |
| asm(" MOV r0,r3"); //return r3 | |
| asm(" BX r14"); | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndAddRelaxed(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndAddRelease(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndAddAcquire(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| //fall through | |
| } | |
| Q_CORE_EXPORT __declspec( naked ) | |
| void *QBasicAtomicPointer_fetchAndAddOrdered(void * volatile *_q_value, qptrdiff valueToAdd) | |
| { | |
| //R0 = _q_value | |
| //R1 = valueToAdd | |
| asm(" STMDB sp!,{r12,lr}"); | |
| asm("retryPointer_fetchAndAddOrdered:"); | |
| asm(" LDREX r2,[r0]"); //r2 = *_q_value | |
| asm(" ADD r3,r2,r1"); //r3 = r2 + r1 | |
| asm(" STREX r12,r3,[r0]"); //*_q_value = r3, r12 = error | |
| asm(" TEQ r12,#0"); //if error | |
| asm(" BNE retryPointer_fetchAndAddOrdered"); //then retry | |
| asm(" MOV r0,r2"); //return r2 | |
| asm(" LDMIA sp!,{r12,pc}"); | |
| } | |
| #else | |
| #error unknown arm compiler | |
| #endif | |
| QT_END_NAMESPACE | |
| #endif | |
| #endif |