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Diffstat (limited to 'Source/JavaScriptCore/interpreter/Register.h')
| -rw-r--r-- | Source/JavaScriptCore/interpreter/Register.h | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/Source/JavaScriptCore/interpreter/Register.h b/Source/JavaScriptCore/interpreter/Register.h new file mode 100644 index 000000000..f3b2125cb --- /dev/null +++ b/Source/JavaScriptCore/interpreter/Register.h @@ -0,0 +1,228 @@ +/* + * 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 |