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 /*

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  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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  * This code is free software; you can redistribute it and/or modify it

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  * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 #ifndef OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP

 #define OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP

 #include "orderAccess_windows_x86.inline.hpp"

 #include "runtime/atomic.hpp"

 #include "runtime/os.hpp"

 #include "vm_version_x86.hpp"

 // 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);

 }

 inline jlong Atomic::load(volatile jlong* src) { return *src; }

 #else // !AMD64

 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);

 }

 inline jlong Atomic::load(volatile jlong* src) {

   volatile jlong dest;

   volatile jlong* pdest = &dest;

   __asm {

     mov eax, src

     fild     qword ptr [eax]

     mov eax, pdest

     fistp    qword ptr [eax]

   }

   return dest;

 }

 inline void Atomic::store(jlong store_value, volatile jlong* dest) {

   volatile jlong* src = &store_value;

   __asm {

     mov eax, src

     fild     qword ptr [eax]

     mov eax, dest

     fistp    qword ptr [eax]

   }

 }

 inline void Atomic::store(jlong store_value, jlong* dest) {

   Atomic::store(store_value, (volatile jlong*)dest);

 }

 #endif // AMD64

 #pragma warning(default: 4035) // Enables warnings reporting missing return statement

 #endif // OS_CPU_WINDOWS_X86_VM_ATOMIC_WINDOWS_X86_INLINE_HPP