mirror of
https://github.com/RGBCube/serenity
synced 2025-05-28 18:25:07 +00:00
e7d69c5d3c
This patch changes the LibJS bytecode to be a stream of instructions packed one-after-the-other in contiguous memory, instead of a vector of OwnPtr<Instruction>. This should be a lot more cache-friendly. :^) Instructions are also devirtualized and instead have a type field using a new Instruction::Type enum. To iterate over a bytecode stream, one must now use Bytecode::InstructionStreamIterator.
59 lines
1.3 KiB
C++
59 lines
1.3 KiB
C++
/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <LibJS/Forward.h>
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#define ENUMERATE_BYTECODE_OPS(O) \
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O(Load) \
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O(Add) \
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O(Sub) \
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O(LessThan) \
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O(AbstractInequals) \
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O(AbstractEquals) \
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O(NewString) \
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O(NewObject) \
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O(GetVariable) \
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O(SetVariable) \
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O(PutById) \
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O(GetById) \
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O(Jump) \
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O(JumpIfFalse) \
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O(JumpIfTrue) \
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O(Call) \
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O(EnterScope) \
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O(Return)
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namespace JS::Bytecode {
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class Instruction {
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public:
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enum class Type {
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#define __BYTECODE_OP(op) \
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op,
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ENUMERATE_BYTECODE_OPS(__BYTECODE_OP)
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#undef __BYTECODE_OP
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};
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Type type() const { return m_type; }
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size_t length() const;
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String to_string() const;
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void execute(Bytecode::Interpreter&) const;
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static void destroy(Instruction&);
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protected:
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explicit Instruction(Type type)
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: m_type(type)
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{
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}
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private:
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Type m_type {};
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};
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}
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