JavaScriptCore-7600.1.4.16.1.tar.gz

[apple/javascriptcore.git] / interpreter / Register.h

diff --git a/interpreter/Register.h b/interpreter/Register.h
index ecd7403246a2eb3952071392623a18766ded561e..054b570e0088c60fef4777235354e1893e0c9863 100644 (file)
--- a/interpreter/Register.h
+++ b/interpreter/Register.h
@@ -10,7 +10,7 @@
  * 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
+ * 3.  Neither the name of Apple 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.
  *
@@ -29,70 +29,69 @@
 #ifndef Register_h
 #define Register_h
 
-#include "JSValue.h"
+#include "JSCJSValue.h"
 #include <wtf/Assertions.h>
-#include <wtf/FastAllocBase.h>
 #include <wtf/VectorTraits.h>
 
 namespace JSC {
 
-    class Arguments;
     class CodeBlock;
     class ExecState;
     class JSActivation;
-    class JSFunction;
+    class JSObject;
     class JSPropertyNameIterator;
-    class ScopeChainNode;
-
-    struct Instruction;
+    class JSScope;
 
     typedef ExecState CallFrame;
 
-    class Register : public WTF::FastAllocBase {
+    class Register {
+        WTF_MAKE_FAST_ALLOCATED;
     public:
         Register();
 
         Register(const JSValue&);
         Register& operator=(const JSValue&);
         JSValue jsValue() const;
+        EncodedJSValue encodedJSValue() const;
         
-        Register& operator=(JSActivation*);
         Register& operator=(CallFrame*);
         Register& operator=(CodeBlock*);
-        Register& operator=(JSFunction*);
-        Register& operator=(JSPropertyNameIterator*);
-        Register& operator=(ScopeChainNode*);
-        Register& operator=(Instruction*);
+        Register& operator=(JSScope*);
 
         int32_t i() const;
         JSActivation* activation() const;
-        Arguments* arguments() const;
         CallFrame* callFrame() const;
         CodeBlock* codeBlock() const;
-        JSFunction* function() const;
+        JSObject* function() const;
         JSPropertyNameIterator* propertyNameIterator() const;
-        ScopeChainNode* scopeChain() const;
-        Instruction* vPC() const;
+        JSScope* scope() const;
+        int32_t unboxedInt32() const;
+        int64_t unboxedInt52() const;
+        int64_t unboxedStrictInt52() const;
+        bool unboxedBoolean() const;
+        double unboxedDouble() 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;
-            r.u.i = i;
+            Register r = jsNumber(i);
             return r;
         }
 
+        static Register withCallee(JSObject* callee);
+
     private:
         union {
-            int32_t i;
             EncodedJSValue value;
-
-            JSActivation* activation;
             CallFrame* callFrame;
             CodeBlock* codeBlock;
-            JSFunction* function;
-            JSPropertyNameIterator* propertyNameIterator;
-            ScopeChainNode* scopeChain;
-            Instruction* vPC;
+            EncodedValueDescriptor encodedValue;
+            double number;
+            int64_t integer;
         } u;
     };
 
@@ -105,17 +104,11 @@ namespace JSC {
 
     ALWAYS_INLINE Register::Register(const JSValue& v)
     {
-#if ENABLE(JSC_ZOMBIES)
-        ASSERT(!v.isZombie());
-#endif
         u.value = JSValue::encode(v);
     }
 
     ALWAYS_INLINE Register& Register::operator=(const JSValue& v)
     {
-#if ENABLE(JSC_ZOMBIES)
-        ASSERT(!v.isZombie());
-#endif
         u.value = JSValue::encode(v);
         return *this;
     }
@@ -125,14 +118,13 @@ namespace JSC {
         return JSValue::decode(u.value);
     }
 
-    // Interpreter functions
-
-    ALWAYS_INLINE Register& Register::operator=(JSActivation* activation)
+    ALWAYS_INLINE EncodedJSValue Register::encodedJSValue() const
     {
-        u.activation = activation;
-        return *this;
+        return u.value;
     }
 
+    // Interpreter functions
+
     ALWAYS_INLINE Register& Register::operator=(CallFrame* callFrame)
     {
         u.callFrame = callFrame;
@@ -145,68 +137,73 @@ namespace JSC {
         return *this;
     }
 
-    ALWAYS_INLINE Register& Register::operator=(JSFunction* function)
+    ALWAYS_INLINE int32_t Register::i() const
     {
-        u.function = function;
-        return *this;
+        return jsValue().asInt32();
     }
 
-    ALWAYS_INLINE Register& Register::operator=(Instruction* vPC)
+    ALWAYS_INLINE CallFrame* Register::callFrame() const
     {
-        u.vPC = vPC;
-        return *this;
+        return u.callFrame;
+    }
+    
+    ALWAYS_INLINE CodeBlock* Register::codeBlock() const
+    {
+        return u.codeBlock;
     }
 
-    ALWAYS_INLINE Register& Register::operator=(ScopeChainNode* scopeChain)
+    ALWAYS_INLINE int32_t Register::unboxedInt32() const
     {
-        u.scopeChain = scopeChain;
-        return *this;
+        return payload();
     }
 
-    ALWAYS_INLINE Register& Register::operator=(JSPropertyNameIterator* propertyNameIterator)
+    ALWAYS_INLINE int64_t Register::unboxedInt52() const
     {
-        u.propertyNameIterator = propertyNameIterator;
-        return *this;
+        return u.integer >> JSValue::int52ShiftAmount;
     }
 
-    ALWAYS_INLINE int32_t Register::i() const
+    ALWAYS_INLINE int64_t Register::unboxedStrictInt52() const
     {
-        return u.i;
+        return u.integer;
     }
-    
-    ALWAYS_INLINE JSActivation* Register::activation() const
+
+    ALWAYS_INLINE bool Register::unboxedBoolean() const
     {
-        return u.activation;
+        return !!payload();
     }
-    
-    ALWAYS_INLINE CallFrame* Register::callFrame() const
+
+    ALWAYS_INLINE double Register::unboxedDouble() const
     {
-        return u.callFrame;
+        return u.number;
     }
-    
-    ALWAYS_INLINE CodeBlock* Register::codeBlock() const
+
+    ALWAYS_INLINE JSCell* Register::unboxedCell() const
     {
-        return u.codeBlock;
+#if USE(JSVALUE64)
+        return u.encodedValue.ptr;
+#else
+        return bitwise_cast<JSCell*>(payload());
+#endif
     }
-    
-    ALWAYS_INLINE JSFunction* Register::function() const
+
+    ALWAYS_INLINE int32_t Register::payload() const
     {
-        return u.function;
+        return u.encodedValue.asBits.payload;
     }
-    
-    ALWAYS_INLINE JSPropertyNameIterator* Register::propertyNameIterator() const
+
+    ALWAYS_INLINE int32_t Register::tag() const
     {
-        return u.propertyNameIterator;
+        return u.encodedValue.asBits.tag;
     }
-    
-    ALWAYS_INLINE ScopeChainNode* Register::scopeChain() const
+
+    ALWAYS_INLINE int32_t& Register::payload()
     {
-        return u.scopeChain;
+        return u.encodedValue.asBits.payload;
     }
-    
-    ALWAYS_INLINE Instruction* Register::vPC() const
+
+    ALWAYS_INLINE int32_t& Register::tag()
     {
-        return u.vPC;
+        return u.encodedValue.asBits.tag;
     }
 
 } // namespace JSC