Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285)

1 files changed, 228 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/interpreter/Register.h b/Source/JavaScriptCore/interpreter/Register.h
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+++ b/Source/JavaScriptCore/interpreter/Register.h
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+/*
+ * Copyright (C) 2008, 2009 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 Register_h
+#define Register_h
+
+#include "JSValue.h"
+#include <wtf/Assertions.h>
+#include <wtf/VectorTraits.h>
+
+namespace JSC {
+
+    class CodeBlock;
+    class ExecState;
+    class JSActivation;
+    class JSObject;
+    class JSPropertyNameIterator;
+    class ScopeChainNode;
+
+    struct InlineCallFrame;
+    struct Instruction;
+
+    typedef ExecState CallFrame;
+
+    class Register {
+        WTF_MAKE_FAST_ALLOCATED;
+    public:
+        Register();
+
+        Register(const JSValue&);
+        Register& operator=(const JSValue&);
+        JSValue jsValue() const;
+        EncodedJSValue encodedJSValue() const;
+        
+        Register& operator=(CallFrame*);
+        Register& operator=(CodeBlock*);
+        Register& operator=(ScopeChainNode*);
+        Register& operator=(Instruction*);
+        Register& operator=(InlineCallFrame*);
+
+        int32_t i() const;
+        JSActivation* activation() const;
+        CallFrame* callFrame() const;
+        CodeBlock* codeBlock() const;
+        JSObject* function() const;
+        JSPropertyNameIterator* propertyNameIterator() const;
+        ScopeChainNode* scopeChain() const;
+        Instruction* vPC() const;
+        InlineCallFrame* asInlineCallFrame() const;
+        int32_t unboxedInt32() const;
+        bool unboxedBoolean() const;
+        JSCell* unboxedCell() const;
+        int32_t payload() const;
+        int32_t tag() const;
+        int32_t& payload();
+        int32_t& tag();
+
+        static Register withInt(int32_t i)
+        {
+            Register r = jsNumber(i);
+            return r;
+        }
+
+        static inline Register withCallee(JSObject* callee);
+
+    private:
+        union {
+            EncodedJSValue value;
+            CallFrame* callFrame;
+            CodeBlock* codeBlock;
+            Instruction* vPC;
+            InlineCallFrame* inlineCallFrame;
+            EncodedValueDescriptor encodedValue;
+        } u;
+    };
+
+    ALWAYS_INLINE Register::Register()
+    {
+#ifndef NDEBUG
+        *this = JSValue();
+#endif
+    }
+
+    ALWAYS_INLINE Register::Register(const JSValue& v)
+    {
+        u.value = JSValue::encode(v);
+    }
+
+    ALWAYS_INLINE Register& Register::operator=(const JSValue& v)
+    {
+        u.value = JSValue::encode(v);
+        return *this;
+    }
+
+    ALWAYS_INLINE JSValue Register::jsValue() const
+    {
+        return JSValue::decode(u.value);
+    }
+
+    ALWAYS_INLINE EncodedJSValue Register::encodedJSValue() const
+    {
+        return u.value;
+    }
+
+    // Interpreter functions
+
+    ALWAYS_INLINE Register& Register::operator=(CallFrame* callFrame)
+    {
+        u.callFrame = callFrame;
+        return *this;
+    }
+
+    ALWAYS_INLINE Register& Register::operator=(CodeBlock* codeBlock)
+    {
+        u.codeBlock = codeBlock;
+        return *this;
+    }
+
+    ALWAYS_INLINE Register& Register::operator=(Instruction* vPC)
+    {
+        u.vPC = vPC;
+        return *this;
+    }
+
+    ALWAYS_INLINE Register& Register::operator=(InlineCallFrame* inlineCallFrame)
+    {
+        u.inlineCallFrame = inlineCallFrame;
+        return *this;
+    }
+
+    ALWAYS_INLINE int32_t Register::i() const
+    {
+        return jsValue().asInt32();
+    }
+
+    ALWAYS_INLINE CallFrame* Register::callFrame() const
+    {
+        return u.callFrame;
+    }
+    
+    ALWAYS_INLINE CodeBlock* Register::codeBlock() const
+    {
+        return u.codeBlock;
+    }
+
+    ALWAYS_INLINE Instruction* Register::vPC() const
+    {
+        return u.vPC;
+    }
+
+    ALWAYS_INLINE InlineCallFrame* Register::asInlineCallFrame() const
+    {
+        return u.inlineCallFrame;
+    }
+        
+    ALWAYS_INLINE int32_t Register::unboxedInt32() const
+    {
+        return payload();
+    }
+
+    ALWAYS_INLINE bool Register::unboxedBoolean() const
+    {
+        return !!payload();
+    }
+
+    ALWAYS_INLINE JSCell* Register::unboxedCell() const
+    {
+#if USE(JSVALUE64)
+        return u.encodedValue.ptr;
+#else
+        return bitwise_cast<JSCell*>(payload());
+#endif
+    }
+
+    ALWAYS_INLINE int32_t Register::payload() const
+    {
+        return u.encodedValue.asBits.payload;
+    }
+
+    ALWAYS_INLINE int32_t Register::tag() const
+    {
+        return u.encodedValue.asBits.tag;
+    }
+
+    ALWAYS_INLINE int32_t& Register::payload()
+    {
+        return u.encodedValue.asBits.payload;
+    }
+
+    ALWAYS_INLINE int32_t& Register::tag()
+    {
+        return u.encodedValue.asBits.tag;
+    }
+
+} // namespace JSC
+
+namespace WTF {
+
+    template<> struct VectorTraits<JSC::Register> : VectorTraitsBase<true, JSC::Register> { };
+
+} // namespace WTF
+
+#endif // Register_h