/******************************************************************************** Copyright (C) 1992-2006 Trolltech ASA. All rights reserved.**** This file is part of the QtCore module of the Qt Toolkit.**** This file may be used under the terms of the GNU General Public** License version 2.0 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 GNU** General Public Licensing requirements will be met:** http://www.trolltech.com/products/qt/opensource.html**** If you are unsure which license is appropriate for your use, please** review the following information:** http://www.trolltech.com/products/qt/licensing.html or contact the** sales department at sales@trolltech.com.**** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.******************************************************************************/#ifndef ALPHA_QATOMIC_H#define ALPHA_QATOMIC_H#include <QtCore/qglobal.h>QT_BEGIN_HEADER#if defined(Q_CC_GNU)inline int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval){    register int ret;    asm volatile("1:\n"                 "ldl_l %0,%1\n"   /* ret=*ptr;                               */                 "cmpeq %0,%2,%0\n"/* if (ret==expected) ret=0; else ret=1;   */                 "beq   %0,3f\n"   /* if (ret==0) goto 3;                     */                 "mov   %3,%0\n"   /* ret=newval;                             */                 "stl_c %0,%1\n"   /* if ((*ptr=ret)!=ret) ret=0; else ret=1; */                 "beq   %0,2f\n"   /* if (ret==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (ret), "+m" (*ptr)                 : "r" (expected), "r" (newval)                 : "memory");    return ret;}inline int q_atomic_test_and_set_acquire_int(volatile int *ptr, int expected, int newval){    register int ret;    asm volatile("1:\n"                 "ldl_l %0,%1\n"   /* ret=*ptr;                               */                 "cmpeq %0,%2,%0\n"/* if (ret==expected) ret=0; else ret=1;   */                 "beq   %0,3f\n"   /* if (ret==0) goto 3;                     */                 "mov   %3,%0\n"   /* ret=newval;                             */                 "stl_c %0,%1\n"   /* if ((*ptr=ret)!=ret) ret=0; else ret=1; */                 "beq   %0,2f\n"   /* if (ret==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 "mb\n"                 : "=&r" (ret), "+m" (*ptr)                 : "r" (expected), "r" (newval)                 : "memory");    return ret;}inline int q_atomic_test_and_set_release_int(volatile int *ptr, int expected, int newval){    register int ret;    asm volatile("mb\n"                 "1:\n"                 "ldl_l %0,%1\n"   /* ret=*ptr;                               */                 "cmpeq %0,%2,%0\n"/* if (ret==expected) ret=0; else ret=1;   */                 "beq   %0,3f\n"   /* if (ret==0) goto 3;                     */                 "mov   %3,%0\n"   /* ret=newval;                             */                 "stl_c %0,%1\n"   /* if ((*ptr=ret)!=ret) ret=0; else ret=1; */                 "beq   %0,2f\n"   /* if (ret==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (ret), "+m" (*ptr)                 : "r" (expected), "r" (newval)                 : "memory");    return ret;}inline int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval){    register void *ret;    asm volatile("1:\n"                 "ldq_l %0,%1\n"   /* ret=*ptr;                               */                 "cmpeq %0,%2,%0\n"/* if (ret==expected) tmp=0; else tmp=1;   */                 "beq   %0,3f\n"   /* if (tmp==0) goto 3;                     */                 "mov   %3,%0\n"   /* tmp=newval;                             */                 "stq_c %0,%1\n"   /* if ((*ptr=tmp)!=tmp) tmp=0; else tmp=1; */                 "beq   %0,2f\n"   /* if (ret==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (ret), "+m" (*reinterpret_cast<volatile long *>(ptr))                 : "r" (expected), "r" (newval)                 : "memory");    return static_cast<int>(reinterpret_cast<long>(ret));}inline int q_atomic_increment(volatile int *ptr){    register int old, tmp;    asm volatile("1:\n"                 "ldl_l %0,%2\n"   /* old=*ptr;                               */                 "addl  %0,1,%1\n" /* tmp=old+1;                              */                 "stl_c %1,%2\n"   /* if ((*ptr=tmp)!=tmp) tmp=0; else tmp=1; */                 "beq   %1,2f\n"   /* if (tmp == 0) goto 2;                   */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (old), "=&r" (tmp), "+m"(*ptr)                 :                 : "memory");    return old != -1;}inline int q_atomic_decrement(volatile int *ptr){    register int old, tmp;    asm volatile("1:\n"                 "ldl_l %0,%2\n"   /* old=*ptr;                               */                 "subl  %0,1,%1\n" /* tmp=old-1;                              */                 "stl_c %1,%2\n"   /* if ((*ptr=tmp)!=tmp) tmp=0; else tmp=1; */                 "beq   %1,2f\n"   /* if (tmp==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (old), "=&r" (tmp), "+m"(*ptr)                 :                 : "memory");    return old != 1;}inline int q_atomic_set_int(volatile int *ptr, int newval){    register int old, tmp;    asm volatile("1:\n"                 "ldl_l %0,%2\n"   /* old=*ptr;                               */                 "mov   %3,%1\n"   /* tmp=newval;                             */                 "stl_c %1,%2\n"   /* if ((*ptr=tmp)!=tmp) tmp=0; else tmp=1; */                 "beq   %1,2f\n"   /* if (tmp==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (old), "=&r" (tmp), "+m" (*ptr)                 : "r" (newval)                 : "memory");    return old;}inline void *q_atomic_set_ptr(volatile void *ptr, void *newval){    register void *old, *tmp;    asm volatile("1:\n"                 "ldq_l %0,%2\n"   /* old=*ptr;                               */                 "mov   %3,%1\n"   /* tmp=newval;                             */                 "stq_c %1,%2\n"   /* if ((*ptr=tmp)!=tmp) tmp=0; else tmp=1; */                 "beq   %1,2f\n"   /* if (tmp==0) goto 2;                     */                 "br    3f\n"      /* goto 3;                                 */                 "2: br 1b\n"      /* goto 1;                                 */                 "3:\n"                 : "=&r" (old), "=&r" (tmp), "+m" (*reinterpret_cast<volatile long *>(ptr))                 : "r" (newval)                 : "memory");    return old;}#else // !Q_CC_GNUextern "C" {    Q_CORE_EXPORT int q_atomic_test_and_set_int(volatile int *ptr, int expected, int newval);    Q_CORE_EXPORT int q_atomic_test_and_set_acquire_int(volatile int *ptr, int expected, int newval);    Q_CORE_EXPORT int q_atomic_test_and_set_release_int(volatile int *ptr, int expected, int newval);    Q_CORE_EXPORT int q_atomic_test_and_set_ptr(volatile void *ptr, void *expected, void *newval);    Q_CORE_EXPORT int q_atomic_increment(volatile int *ptr);    Q_CORE_EXPORT int q_atomic_decrement(volatile int *ptr);    Q_CORE_EXPORT int q_atomic_set_int(volatile int *ptr, int newval);    Q_CORE_EXPORT void *q_atomic_set_ptr(volatile void *ptr, void *newval);} // extern "C"#endif // Q_CC_GNUQT_END_HEADER#endif // ALPHA_QATOMIC_H