Mercurial > hg > truffle
diff src/os_cpu/windows_x86/vm/atomic_windows_x86.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os_cpu/windows_x86/vm/atomic_windows_x86.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,251 @@ +/* + * Copyright 1999-2005 Sun Microsystems, Inc. All Rights Reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// The following alternative implementations are needed because +// Windows 95 doesn't support (some of) the corresponding Windows NT +// calls. Furthermore, these versions allow inlining in the caller. +// (More precisely: The documentation for InterlockedExchange says +// it is supported for Windows 95. However, when single-stepping +// through the assembly code we cannot step into the routine and +// when looking at the routine address we see only garbage code. +// Better safe then sorry!). Was bug 7/31/98 (gri). +// +// Performance note: On uniprocessors, the 'lock' prefixes are not +// necessary (and expensive). We should generate separate cases if +// this becomes a performance problem. + +#pragma warning(disable: 4035) // Disables warnings reporting missing return statement + +inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; } +inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; } +inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; } + +inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; } +inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; } + +inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; } +inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; } +inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; } + + +inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; } +inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; } + +// Adding a lock prefix to an instruction on MP machine +// VC++ doesn't like the lock prefix to be on a single line +// so we can't insert a label after the lock prefix. +// By emitting a lock prefix, we can define a label after it. +#define LOCK_IF_MP(mp) __asm cmp mp, 0 \ + __asm je L0 \ + __asm _emit 0xF0 \ + __asm L0: + +#ifdef AMD64 +inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } +inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } + +inline jint Atomic::add (jint add_value, volatile jint* dest) { + return (jint)(*os::atomic_add_func)(add_value, dest); +} + +inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { + return (intptr_t)(*os::atomic_add_ptr_func)(add_value, dest); +} + +inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { + return (void*)(*os::atomic_add_ptr_func)(add_value, (volatile intptr_t*)dest); +} + +inline void Atomic::inc (volatile jint* dest) { + (void)add (1, dest); +} + +inline void Atomic::inc_ptr(volatile intptr_t* dest) { + (void)add_ptr(1, dest); +} + +inline void Atomic::inc_ptr(volatile void* dest) { + (void)add_ptr(1, dest); +} + +inline void Atomic::dec (volatile jint* dest) { + (void)add (-1, dest); +} + +inline void Atomic::dec_ptr(volatile intptr_t* dest) { + (void)add_ptr(-1, dest); +} + +inline void Atomic::dec_ptr(volatile void* dest) { + (void)add_ptr(-1, dest); +} + +inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { + return (jint)(*os::atomic_xchg_func)(exchange_value, dest); +} + +inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { + return (intptr_t)(os::atomic_xchg_ptr_func)(exchange_value, dest); +} + +inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { + return (void *)(os::atomic_xchg_ptr_func)((intptr_t)exchange_value, (volatile intptr_t*)dest); +} + +inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { + return (*os::atomic_cmpxchg_func)(exchange_value, dest, compare_value); +} + +inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { + return (*os::atomic_cmpxchg_long_func)(exchange_value, dest, compare_value); +} + +inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { + return (intptr_t)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); +} + +inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { + return (void*)cmpxchg((jlong)exchange_value, (volatile jlong*)dest, (jlong)compare_value); +} + +#else // !AMD64 + +//inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; } +//inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; } +inline jint Atomic::add (jint add_value, volatile jint* dest) { + int mp = os::is_MP(); + __asm { + mov edx, dest; + mov eax, add_value; + mov ecx, eax; + LOCK_IF_MP(mp) + xadd dword ptr [edx], eax; + add eax, ecx; + } +} + +inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) { + return (intptr_t)add((jint)add_value, (volatile jint*)dest); +} + +inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) { + return (void*)add((jint)add_value, (volatile jint*)dest); +} + +inline void Atomic::inc (volatile jint* dest) { + // alternative for InterlockedIncrement + int mp = os::is_MP(); + __asm { + mov edx, dest; + LOCK_IF_MP(mp) + add dword ptr [edx], 1; + } +} + +inline void Atomic::inc_ptr(volatile intptr_t* dest) { + inc((volatile jint*)dest); +} + +inline void Atomic::inc_ptr(volatile void* dest) { + inc((volatile jint*)dest); +} + +inline void Atomic::dec (volatile jint* dest) { + // alternative for InterlockedDecrement + int mp = os::is_MP(); + __asm { + mov edx, dest; + LOCK_IF_MP(mp) + sub dword ptr [edx], 1; + } +} + +inline void Atomic::dec_ptr(volatile intptr_t* dest) { + dec((volatile jint*)dest); +} + +inline void Atomic::dec_ptr(volatile void* dest) { + dec((volatile jint*)dest); +} + +inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) { + // alternative for InterlockedExchange + __asm { + mov eax, exchange_value; + mov ecx, dest; + xchg eax, dword ptr [ecx]; + } +} + +inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) { + return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest); +} + +inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) { + return (void*)xchg((jint)exchange_value, (volatile jint*)dest); +} + +inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) { + // alternative for InterlockedCompareExchange + int mp = os::is_MP(); + __asm { + mov edx, dest + mov ecx, exchange_value + mov eax, compare_value + LOCK_IF_MP(mp) + cmpxchg dword ptr [edx], ecx + } +} + +inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) { + int mp = os::is_MP(); + jint ex_lo = (jint)exchange_value; + jint ex_hi = *( ((jint*)&exchange_value) + 1 ); + jint cmp_lo = (jint)compare_value; + jint cmp_hi = *( ((jint*)&compare_value) + 1 ); + __asm { + push ebx + push edi + mov eax, cmp_lo + mov edx, cmp_hi + mov edi, dest + mov ebx, ex_lo + mov ecx, ex_hi + LOCK_IF_MP(mp) + cmpxchg8b qword ptr [edi] + pop edi + pop ebx + } +} + +inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) { + return (intptr_t)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); +} + +inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) { + return (void*)cmpxchg((jint)exchange_value, (volatile jint*)dest, (jint)compare_value); +} +#endif // AMD64 + +#pragma warning(default: 4035) // Enables warnings reporting missing return statement