1 files changed, 146 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/JavaScriptCore/bytecode/Instruction.h b/src/3rdparty/webkit/JavaScriptCore/bytecode/Instruction.h
new file mode 100644
index 0000000..81a7fa0
--- /dev/null
+++ b/src/3rdparty/webkit/JavaScriptCore/bytecode/Instruction.h
@@ -0,0 +1,146 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1.  Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ * 2.  Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
+ *     its contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef Instruction_h
+#define Instruction_h
+
+#include "Opcode.h"
+#include "Structure.h"
+#include <wtf/VectorTraits.h>
+
+#define POLYMORPHIC_LIST_CACHE_SIZE 4
+
+namespace JSC {
+
+    class JSCell;
+    class Structure;
+    class StructureChain;
+
+    // Structure used by op_get_by_id_self_list and op_get_by_id_proto_list instruction to hold data off the main opcode stream.
+    struct PolymorphicAccessStructureList {
+        struct PolymorphicStubInfo {
+            bool isChain;
+            void* stubRoutine;
+            Structure* base;
+            union {
+                Structure* proto;
+                StructureChain* chain;
+            } u;
+
+            void set(void* _stubRoutine, Structure* _base)
+            {
+                stubRoutine = _stubRoutine;
+                base = _base;
+                u.proto = 0;
+                isChain = false;
+            }
+            
+            void set(void* _stubRoutine, Structure* _base, Structure* _proto)
+            {
+                stubRoutine = _stubRoutine;
+                base = _base;
+                u.proto = _proto;
+                isChain = false;
+            }
+            
+            void set(void* _stubRoutine, Structure* _base, StructureChain* _chain)
+            {
+                stubRoutine = _stubRoutine;
+                base = _base;
+                u.chain = _chain;
+                isChain = true;
+            }
+        } list[POLYMORPHIC_LIST_CACHE_SIZE];
+        
+        PolymorphicAccessStructureList(void* stubRoutine, Structure* firstBase)
+        {
+            list[0].set(stubRoutine, firstBase);
+        }
+
+        PolymorphicAccessStructureList(void* stubRoutine, Structure* firstBase, Structure* firstProto)
+        {
+            list[0].set(stubRoutine, firstBase, firstProto);
+        }
+
+        PolymorphicAccessStructureList(void* stubRoutine, Structure* firstBase, StructureChain* firstChain)
+        {
+            list[0].set(stubRoutine, firstBase, firstChain);
+        }
+
+        void derefStructures(int count)
+        {
+            for (int i = 0; i < count; ++i) {
+                PolymorphicStubInfo& info = list[i];
+
+                ASSERT(info.base);
+                info.base->deref();
+
+                if (info.u.proto) {
+                    if (info.isChain)
+                        info.u.chain->deref();
+                    else
+                        info.u.proto->deref();
+                }
+            }
+        }
+    };
+
+    struct Instruction {
+        Instruction(Opcode opcode) { u.opcode = opcode; }
+        Instruction(int operand)
+        {
+            // We have to initialize one of the pointer members to ensure that
+            // the entire struct is initialised in 64-bit.
+            u.jsCell = 0;
+            u.operand = operand;
+        }
+
+        Instruction(Structure* structure) { u.structure = structure; }
+        Instruction(StructureChain* structureChain) { u.structureChain = structureChain; }
+        Instruction(JSCell* jsCell) { u.jsCell = jsCell; }
+        Instruction(PolymorphicAccessStructureList* polymorphicStructures) { u.polymorphicStructures = polymorphicStructures; }
+
+        union {
+            Opcode opcode;
+            int operand;
+            Structure* structure;
+            StructureChain* structureChain;
+            JSCell* jsCell;
+            PolymorphicAccessStructureList* polymorphicStructures;
+        } u;
+    };
+
+} // namespace JSC
+
+namespace WTF {
+
+    template<> struct VectorTraits<JSC::Instruction> : VectorTraitsBase<true, JSC::Instruction> { };
+
+} // namespace WTF
+
+#endif // Instruction_h