diff src/os_cpu/windows_x86/vm/atomic_windows_x86.inline.hpp @ 0:a61af66fc99e

Initial load
author duke
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
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+/*
+ * 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