#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 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;
}
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 WTF {
template<> struct VectorTraits<JSC::Register> : VectorTraitsBase<true, JSC::Register> { };
}
#endif // Register_h