/*
- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * 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
#ifndef Register_h
#define Register_h
-#include "JSValue.h"
+#include "JSCJSValue.h"
+#include <wtf/Assertions.h>
#include <wtf/VectorTraits.h>
namespace JSC {
- class Arguments;
class CodeBlock;
class ExecState;
class JSActivation;
- class JSFunction;
+ class JSObject;
class JSPropertyNameIterator;
- class ScopeChainNode;
+ class JSScope;
+ struct InlineCallFrame;
struct Instruction;
typedef ExecState CallFrame;
class Register {
+ WTF_MAKE_FAST_ALLOCATED;
public:
Register();
- Register(JSValuePtr);
- JSValuePtr jsValue(CallFrame*) const;
- JSValuePtr getJSValue() const;
-
- bool marked() const;
- void mark();
+ Register(const JSValue&);
+ Register& operator=(const JSValue&);
+ JSValue jsValue() const;
+ EncodedJSValue encodedJSValue() const;
- private:
- friend class ExecState;
- friend class Interpreter;
-
- // Only CallFrame and Interpreter should use these functions.
-
- Register(intptr_t);
-
- Register(JSActivation*);
- Register(Arguments*);
- Register(CallFrame*);
- Register(CodeBlock*);
- Register(JSFunction*);
- Register(JSPropertyNameIterator*);
- Register(ScopeChainNode*);
- Register(Instruction*);
-
- intptr_t i() const;
- void* v() const;
+ Register& operator=(CallFrame*);
+ Register& operator=(CodeBlock*);
+ Register& operator=(JSScope*);
+ Register& operator=(Instruction*);
+ Register& operator=(InlineCallFrame*);
+ 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;
+ JSScope* scope() 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 Register withCallee(JSObject* callee);
+ private:
union {
- intptr_t i;
- void* v;
- JSValueEncodedAsPointer* value;
-
- JSActivation* activation;
- Arguments* arguments;
+ EncodedJSValue value;
CallFrame* callFrame;
CodeBlock* codeBlock;
- JSFunction* function;
- JSPropertyNameIterator* propertyNameIterator;
- ScopeChainNode* scopeChain;
Instruction* vPC;
+ InlineCallFrame* inlineCallFrame;
+ EncodedValueDescriptor encodedValue;
} u;
-
-#ifndef NDEBUG
- enum {
- EmptyType,
-
- IntType,
- ValueType,
-
- ActivationType,
- ArgumentsType,
- CallFrameType,
- CodeBlockType,
- FunctionType,
- InstructionType,
- PropertyNameIteratorType,
- RegisterType,
- ScopeChainNodeType
- } m_type;
-#endif
};
-#ifndef NDEBUG
- #define SET_TYPE(type) m_type = (type)
- // FIXME: The CTI code to put value into registers doesn't set m_type.
- // Once it does, we can turn this assertion back on.
- #define ASSERT_TYPE(type)
-#else
- #define SET_TYPE(type)
- #define ASSERT_TYPE(type)
-#endif
-
ALWAYS_INLINE Register::Register()
{
#ifndef NDEBUG
- SET_TYPE(EmptyType);
- u.value = JSValuePtr::encode(noValue());
+ *this = JSValue();
#endif
}
- ALWAYS_INLINE Register::Register(JSValuePtr v)
+ ALWAYS_INLINE Register::Register(const JSValue& v)
{
- SET_TYPE(ValueType);
- u.value = JSValuePtr::encode(v);
+ u.value = JSValue::encode(v);
}
- // This function is scaffolding for legacy clients. It will eventually go away.
- ALWAYS_INLINE JSValuePtr Register::jsValue(CallFrame*) const
+ ALWAYS_INLINE Register& Register::operator=(const JSValue& v)
{
- // Once registers hold doubles, this function will allocate a JSValue*
- // if the register doesn't hold one already.
- ASSERT_TYPE(ValueType);
- return JSValuePtr::decode(u.value);
- }
-
- ALWAYS_INLINE JSValuePtr Register::getJSValue() const
- {
- ASSERT_TYPE(JSValueType);
- return JSValuePtr::decode(u.value);
- }
-
- ALWAYS_INLINE bool Register::marked() const
- {
- return getJSValue().marked();
+ u.value = JSValue::encode(v);
+ return *this;
}
- ALWAYS_INLINE void Register::mark()
+ ALWAYS_INLINE JSValue Register::jsValue() const
{
- getJSValue().mark();
+ return JSValue::decode(u.value);
}
-
- // Interpreter functions
- ALWAYS_INLINE Register::Register(Arguments* arguments)
+ ALWAYS_INLINE EncodedJSValue Register::encodedJSValue() const
{
- SET_TYPE(ArgumentsType);
- u.arguments = arguments;
+ return u.value;
}
- ALWAYS_INLINE Register::Register(JSActivation* activation)
- {
- SET_TYPE(ActivationType);
- u.activation = activation;
- }
+ // Interpreter functions
- ALWAYS_INLINE Register::Register(CallFrame* callFrame)
+ ALWAYS_INLINE Register& Register::operator=(CallFrame* callFrame)
{
- SET_TYPE(CallFrameType);
u.callFrame = callFrame;
+ return *this;
}
- ALWAYS_INLINE Register::Register(CodeBlock* codeBlock)
+ ALWAYS_INLINE Register& Register::operator=(CodeBlock* codeBlock)
{
- SET_TYPE(CodeBlockType);
u.codeBlock = codeBlock;
+ return *this;
}
- ALWAYS_INLINE Register::Register(JSFunction* function)
+ ALWAYS_INLINE Register& Register::operator=(Instruction* vPC)
{
- SET_TYPE(FunctionType);
- u.function = function;
- }
-
- ALWAYS_INLINE Register::Register(Instruction* vPC)
- {
- SET_TYPE(InstructionType);
u.vPC = vPC;
+ return *this;
}
- ALWAYS_INLINE Register::Register(ScopeChainNode* scopeChain)
- {
- SET_TYPE(ScopeChainNodeType);
- u.scopeChain = scopeChain;
- }
-
- ALWAYS_INLINE Register::Register(JSPropertyNameIterator* propertyNameIterator)
+ ALWAYS_INLINE Register& Register::operator=(InlineCallFrame* inlineCallFrame)
{
- SET_TYPE(PropertyNameIteratorType);
- u.propertyNameIterator = propertyNameIterator;
+ u.inlineCallFrame = inlineCallFrame;
+ return *this;
}
- ALWAYS_INLINE Register::Register(intptr_t i)
+ ALWAYS_INLINE int32_t Register::i() const
{
- SET_TYPE(IntType);
- u.i = i;
+ return jsValue().asInt32();
}
- ALWAYS_INLINE intptr_t Register::i() const
+ ALWAYS_INLINE CallFrame* Register::callFrame() const
{
- ASSERT_TYPE(IntType);
- return u.i;
+ return u.callFrame;
}
- ALWAYS_INLINE void* Register::v() const
+ ALWAYS_INLINE CodeBlock* Register::codeBlock() const
{
- return u.v;
+ return u.codeBlock;
}
- ALWAYS_INLINE JSActivation* Register::activation() const
+ ALWAYS_INLINE Instruction* Register::vPC() const
{
- ASSERT_TYPE(ActivationType);
- return u.activation;
+ return u.vPC;
}
-
- ALWAYS_INLINE Arguments* Register::arguments() const
+
+ ALWAYS_INLINE InlineCallFrame* Register::asInlineCallFrame() const
{
- ASSERT_TYPE(ArgumentsType);
- return u.arguments;
+ return u.inlineCallFrame;
}
-
- ALWAYS_INLINE CallFrame* Register::callFrame() const
+
+ ALWAYS_INLINE int32_t Register::unboxedInt32() const
{
- ASSERT_TYPE(CallFrameType);
- return u.callFrame;
+ return payload();
}
-
- ALWAYS_INLINE CodeBlock* Register::codeBlock() const
+
+ ALWAYS_INLINE bool Register::unboxedBoolean() const
{
- ASSERT_TYPE(CodeBlockType);
- return u.codeBlock;
+ return !!payload();
}
-
- ALWAYS_INLINE JSFunction* Register::function() const
+
+ ALWAYS_INLINE JSCell* Register::unboxedCell() const
{
- ASSERT_TYPE(FunctionType);
- return u.function;
+#if USE(JSVALUE64)
+ return u.encodedValue.ptr;
+#else
+ return bitwise_cast<JSCell*>(payload());
+#endif
}
-
- ALWAYS_INLINE JSPropertyNameIterator* Register::propertyNameIterator() const
+
+ ALWAYS_INLINE int32_t Register::payload() const
{
- ASSERT_TYPE(PropertyNameIteratorType);
- return u.propertyNameIterator;
+ return u.encodedValue.asBits.payload;
}
-
- ALWAYS_INLINE ScopeChainNode* Register::scopeChain() const
+
+ ALWAYS_INLINE int32_t Register::tag() const
{
- ASSERT_TYPE(ScopeChainNodeType);
- return u.scopeChain;
+ return u.encodedValue.asBits.tag;
}
-
- ALWAYS_INLINE Instruction* Register::vPC() const
+
+ ALWAYS_INLINE int32_t& Register::payload()
{
- ASSERT_TYPE(InstructionType);
- return u.vPC;
+ return u.encodedValue.asBits.payload;
}
- #undef SET_TYPE
- #undef ASSERT_TYPE
+ ALWAYS_INLINE int32_t& Register::tag()
+ {
+ return u.encodedValue.asBits.tag;
+ }
} // namespace JSC
projects / apple / javascriptcore.git / blobdiff