#ifndef BASE_ATOMICOPS_INTERNALS_LINUXPPC_H_
#define BASE_ATOMICOPS_INTERNALS_LINUXPPC_H_
typedef int32_t Atomic32;
#ifdef __PPC64__
#define BASE_HAS_ATOMIC64 1
#endif
namespace base {
namespace subtle {
static inline void _sync(void) {
__asm__ __volatile__("sync": : : "memory");
}
static inline void _lwsync(void) {
#ifdef __NO_LWSYNC__
__asm__ __volatile__("msync": : : "memory");
#else
__asm__ __volatile__("lwsync": : : "memory");
#endif
}
static inline void _isync(void) {
__asm__ __volatile__("isync": : : "memory");
}
static inline Atomic32 OSAtomicAdd32(Atomic32 amount, Atomic32 *value) {
Atomic32 t;
__asm__ __volatile__(
"1: lwarx %0,0,%3\n\
add %0,%2,%0\n\
stwcx. %0,0,%3 \n\
bne- 1b"
: "=&r" (t), "+m" (*value)
: "r" (amount), "r" (value)
: "cc");
return t;
}
static inline Atomic32 OSAtomicAdd32Barrier(Atomic32 amount, Atomic32 *value) {
Atomic32 t;
_lwsync();
t = OSAtomicAdd32(amount, value);
_isync();
return t;
}
static inline bool OSAtomicCompareAndSwap32(Atomic32 old_value,
Atomic32 new_value,
Atomic32 *value) {
Atomic32 prev;
__asm__ __volatile__(
"1: lwarx %0,0,%2\n\
cmpw 0,%0,%3\n\
bne- 2f\n\
stwcx. %4,0,%2\n\
bne- 1b\n\
2:"
: "=&r" (prev), "+m" (*value)
: "r" (value), "r" (old_value), "r" (new_value)
: "cc");
return prev == old_value;
}
static inline Atomic32 OSAtomicCompareAndSwap32Acquire(Atomic32 old_value,
Atomic32 new_value,
Atomic32 *value) {
Atomic32 t;
t = OSAtomicCompareAndSwap32(old_value, new_value, value);
_isync();
return t;
}
static inline Atomic32 OSAtomicCompareAndSwap32Release(Atomic32 old_value,
Atomic32 new_value,
Atomic32 *value) {
_lwsync();
return OSAtomicCompareAndSwap32(old_value, new_value, value);
}
typedef int64_t Atomic64;
inline void MemoryBarrier() {
_sync();
}
inline Atomic32 NoBarrier_CompareAndSwap(volatile Atomic32 *ptr,
Atomic32 old_value,
Atomic32 new_value) {
Atomic32 prev_value;
do {
if (OSAtomicCompareAndSwap32(old_value, new_value,
const_cast<Atomic32*>(ptr))) {
return old_value;
}
prev_value = *ptr;
} while (prev_value == old_value);
return prev_value;
}
inline Atomic32 NoBarrier_AtomicExchange(volatile Atomic32 *ptr,
Atomic32 new_value) {
Atomic32 old_value;
do {
old_value = *ptr;
} while (!OSAtomicCompareAndSwap32(old_value, new_value,
const_cast<Atomic32*>(ptr)));
return old_value;
}
inline Atomic32 NoBarrier_AtomicIncrement(volatile Atomic32 *ptr,
Atomic32 increment) {
return OSAtomicAdd32(increment, const_cast<Atomic32*>(ptr));
}
inline Atomic32 Barrier_AtomicIncrement(volatile Atomic32 *ptr,
Atomic32 increment) {
return OSAtomicAdd32Barrier(increment, const_cast<Atomic32*>(ptr));
}
inline Atomic32 Acquire_CompareAndSwap(volatile Atomic32 *ptr,
Atomic32 old_value,
Atomic32 new_value) {
Atomic32 prev_value;
do {
if (OSAtomicCompareAndSwap32Acquire(old_value, new_value,
const_cast<Atomic32*>(ptr))) {
return old_value;
}
prev_value = *ptr;
} while (prev_value == old_value);
return prev_value;
}
inline Atomic32 Release_CompareAndSwap(volatile Atomic32 *ptr,
Atomic32 old_value,
Atomic32 new_value) {
Atomic32 prev_value;
do {
if (OSAtomicCompareAndSwap32Release(old_value, new_value,
const_cast<Atomic32*>(ptr))) {
return old_value;
}
prev_value = *ptr;
} while (prev_value == old_value);
return prev_value;
}
#ifdef __PPC64__
static inline Atomic64 OSAtomicAdd64(Atomic64 amount, Atomic64 *value) {
Atomic64 t;
__asm__ __volatile__(
"1: ldarx %0,0,%3\n\
add %0,%2,%0\n\
stdcx. %0,0,%3 \n\
bne- 1b"
: "=&r" (t), "+m" (*value)
: "r" (amount), "r" (value)
: "cc");
return t;
}
static inline Atomic64 OSAtomicAdd64Barrier(Atomic64 amount, Atomic64 *value) {
Atomic64 t;
_lwsync();
t = OSAtomicAdd64(amount, value);
_isync();
return t;
}
static inline bool OSAtomicCompareAndSwap64(Atomic64 old_value,
Atomic64 new_value,
Atomic64 *value) {
Atomic64 prev;
__asm__ __volatile__(
"1: ldarx %0,0,%2\n\
cmpw 0,%0,%3\n\
bne- 2f\n\
stdcx. %4,0,%2\n\
bne- 1b\n\
2:"
: "=&r" (prev), "+m" (*value)
: "r" (value), "r" (old_value), "r" (new_value)
: "cc");
return prev == old_value;
}
static inline Atomic64 OSAtomicCompareAndSwap64Acquire(Atomic64 old_value,
Atomic64 new_value,
Atomic64 *value) {
Atomic64 t;
t = OSAtomicCompareAndSwap64(old_value, new_value, value);
_isync();
return t;
}
static inline Atomic64 OSAtomicCompareAndSwap64Release(Atomic64 old_value,
Atomic64 new_value,
Atomic64 *value) {
_lwsync();
return OSAtomicCompareAndSwap64(old_value, new_value, value);
}
inline Atomic64 NoBarrier_CompareAndSwap(volatile Atomic64 *ptr,
Atomic64 old_value,
Atomic64 new_value) {
Atomic64 prev_value;
do {
if (OSAtomicCompareAndSwap64(old_value, new_value,
const_cast<Atomic64*>(ptr))) {
return old_value;
}
prev_value = *ptr;
} while (prev_value == old_value);
return prev_value;
}
inline Atomic64 NoBarrier_AtomicExchange(volatile Atomic64 *ptr,
Atomic64 new_value) {
Atomic64 old_value;
do {
old_value = *ptr;
} while (!OSAtomicCompareAndSwap64(old_value, new_value,
const_cast<Atomic64*>(ptr)));
return old_value;
}
inline Atomic64 NoBarrier_AtomicIncrement(volatile Atomic64 *ptr,
Atomic64 increment) {
return OSAtomicAdd64(increment, const_cast<Atomic64*>(ptr));
}
inline Atomic64 Barrier_AtomicIncrement(volatile Atomic64 *ptr,
Atomic64 increment) {
return OSAtomicAdd64Barrier(increment, const_cast<Atomic64*>(ptr));
}
inline Atomic64 Acquire_CompareAndSwap(volatile Atomic64 *ptr,
Atomic64 old_value,
Atomic64 new_value) {
Atomic64 prev_value;
do {
if (OSAtomicCompareAndSwap64Acquire(old_value, new_value,
const_cast<Atomic64*>(ptr))) {
return old_value;
}
prev_value = *ptr;
} while (prev_value == old_value);
return prev_value;
}
inline Atomic64 Release_CompareAndSwap(volatile Atomic64 *ptr,
Atomic64 old_value,
Atomic64 new_value) {
Atomic64 prev_value;
do {
if (OSAtomicCompareAndSwap64Release(old_value, new_value,
const_cast<Atomic64*>(ptr))) {
return old_value;
}
prev_value = *ptr;
} while (prev_value == old_value);
return prev_value;
}
#endif
inline void NoBarrier_Store(volatile Atomic32 *ptr, Atomic32 value) {
*ptr = value;
}
inline void Acquire_Store(volatile Atomic32 *ptr, Atomic32 value) {
*ptr = value;
_sync();
}
inline void Release_Store(volatile Atomic32 *ptr, Atomic32 value) {
_lwsync();
*ptr = value;
}
inline Atomic32 NoBarrier_Load(volatile const Atomic32 *ptr) {
return *ptr;
}
inline Atomic32 Acquire_Load(volatile const Atomic32 *ptr) {
Atomic32 value = *ptr;
_lwsync();
return value;
}
inline Atomic32 Release_Load(volatile const Atomic32 *ptr) {
_sync();
return *ptr;
}
#ifdef __PPC64__
inline void NoBarrier_Store(volatile Atomic64 *ptr, Atomic64 value) {
*ptr = value;
}
inline void Acquire_Store(volatile Atomic64 *ptr, Atomic64 value) {
*ptr = value;
_sync();
}
inline void Release_Store(volatile Atomic64 *ptr, Atomic64 value) {
_lwsync();
*ptr = value;
}
inline Atomic64 NoBarrier_Load(volatile const Atomic64 *ptr) {
return *ptr;
}
inline Atomic64 Acquire_Load(volatile const Atomic64 *ptr) {
Atomic64 value = *ptr;
_lwsync();
return value;
}
inline Atomic64 Release_Load(volatile const Atomic64 *ptr) {
_sync();
return *ptr;
}
#endif
}
}
#endif