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-rw-r--r--js/src/jit/none/AtomicOperations-ppc.h76
1 files changed, 0 insertions, 76 deletions
diff --git a/js/src/jit/none/AtomicOperations-ppc.h b/js/src/jit/none/AtomicOperations-ppc.h
index 182de9f8a..465c0cf41 100644
--- a/js/src/jit/none/AtomicOperations-ppc.h
+++ b/js/src/jit/none/AtomicOperations-ppc.h
@@ -13,22 +13,9 @@
#if defined(__clang__) || defined(__GNUC__)
-// The default implementation tactic for gcc/clang is to use the newer
-// __atomic intrinsics added for use in C++11 <atomic>. Where that
-// isn't available, we use GCC's older __sync functions instead.
-//
-// ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS is kept as a backward
-// compatible option for older compilers: enable this to use GCC's old
-// __sync functions instead of the newer __atomic functions. This
-// will be required for GCC 4.6.x and earlier, and probably for Clang
-// 3.1, should we need to use those versions.
-
-//#define ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
-
inline bool
js::jit::AtomicOperations::isLockfree8()
{
-# ifndef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
MOZ_ASSERT(__atomic_always_lock_free(sizeof(int8_t), 0));
MOZ_ASSERT(__atomic_always_lock_free(sizeof(int16_t), 0));
MOZ_ASSERT(__atomic_always_lock_free(sizeof(int32_t), 0));
@@ -37,19 +24,12 @@ js::jit::AtomicOperations::isLockfree8()
MOZ_ASSERT(__atomic_always_lock_free(sizeof(int64_t), 0));
# endif
return true;
-# else
- return false;
-# endif
}
inline void
js::jit::AtomicOperations::fenceSeqCst()
{
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- __sync_synchronize();
-# else
__atomic_thread_fence(__ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -57,14 +37,8 @@ inline T
js::jit::AtomicOperations::loadSeqCst(T* addr)
{
MOZ_ASSERT(sizeof(T) < 8 || isLockfree8());
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- __sync_synchronize();
- T v = *addr;
- __sync_synchronize();
-# else
T v;
__atomic_load(addr, &v, __ATOMIC_SEQ_CST);
-# endif
return v;
}
@@ -73,13 +47,7 @@ inline void
js::jit::AtomicOperations::storeSeqCst(T* addr, T val)
{
MOZ_ASSERT(sizeof(T) < 8 || isLockfree8());
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- __sync_synchronize();
- *addr = val;
- __sync_synchronize();
-# else
__atomic_store(addr, &val, __ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -87,12 +55,8 @@ inline T
js::jit::AtomicOperations::compareExchangeSeqCst(T* addr, T oldval, T newval)
{
MOZ_ASSERT(sizeof(T) < 8 || isLockfree8());
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- return __sync_val_compare_and_swap(addr, oldval, newval);
-# else
__atomic_compare_exchange(addr, &oldval, &newval, false, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST);
return oldval;
-# endif
}
template<typename T>
@@ -100,11 +64,7 @@ inline T
js::jit::AtomicOperations::fetchAddSeqCst(T* addr, T val)
{
static_assert(sizeof(T) <= 4, "not available for 8-byte values yet");
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- return __sync_fetch_and_add(addr, val);
-# else
return __atomic_fetch_add(addr, val, __ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -112,11 +72,7 @@ inline T
js::jit::AtomicOperations::fetchSubSeqCst(T* addr, T val)
{
static_assert(sizeof(T) <= 4, "not available for 8-byte values yet");
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- return __sync_fetch_and_sub(addr, val);
-# else
return __atomic_fetch_sub(addr, val, __ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -124,11 +80,7 @@ inline T
js::jit::AtomicOperations::fetchAndSeqCst(T* addr, T val)
{
static_assert(sizeof(T) <= 4, "not available for 8-byte values yet");
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- return __sync_fetch_and_and(addr, val);
-# else
return __atomic_fetch_and(addr, val, __ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -136,11 +88,7 @@ inline T
js::jit::AtomicOperations::fetchOrSeqCst(T* addr, T val)
{
static_assert(sizeof(T) <= 4, "not available for 8-byte values yet");
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- return __sync_fetch_and_or(addr, val);
-# else
return __atomic_fetch_or(addr, val, __ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -148,11 +96,7 @@ inline T
js::jit::AtomicOperations::fetchXorSeqCst(T* addr, T val)
{
static_assert(sizeof(T) <= 4, "not available for 8-byte values yet");
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- return __sync_fetch_and_xor(addr, val);
-# else
return __atomic_fetch_xor(addr, val, __ATOMIC_SEQ_CST);
-# endif
}
template<typename T>
@@ -186,35 +130,21 @@ inline T
js::jit::AtomicOperations::exchangeSeqCst(T* addr, T val)
{
MOZ_ASSERT(sizeof(T) < 8 || isLockfree8());
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- T v;
- __sync_synchronize();
- do {
- v = *addr;
- } while (__sync_val_compare_and_swap(addr, v, val) != v);
- return v;
-# else
T v;
__atomic_exchange(addr, &val, &v, __ATOMIC_SEQ_CST);
return v;
-# endif
}
template<size_t nbytes>
inline void
js::jit::RegionLock::acquire(void* addr)
{
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- while (!__sync_bool_compare_and_swap(&spinlock, 0, 1))
- ;
-# else
uint32_t zero = 0;
uint32_t one = 1;
while (!__atomic_compare_exchange(&spinlock, &zero, &one, false, __ATOMIC_ACQUIRE, __ATOMIC_ACQUIRE)) {
zero = 0;
continue;
}
-# endif
}
template<size_t nbytes>
@@ -222,16 +152,10 @@ inline void
js::jit::RegionLock::release(void* addr)
{
MOZ_ASSERT(AtomicOperations::loadSeqCst(&spinlock) == 1, "releasing unlocked region lock");
-# ifdef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
- __sync_sub_and_fetch(&spinlock, 1);
-# else
uint32_t zero = 0;
__atomic_store(&spinlock, &zero, __ATOMIC_SEQ_CST);
-# endif
}
-# undef ATOMICS_IMPLEMENTED_WITH_SYNC_INTRINSICS
-
#elif defined(ENABLE_SHARED_ARRAY_BUFFER)
# error "Either disable JS shared memory, use GCC or Clang, or add code here"
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-09 16:36:16 +0000