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87 lines
3.2 KiB
C++
87 lines
3.2 KiB
C++
/*
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* Copyright (c) 2016-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#ifndef AssignmentExpressionSignedRightShiftNode_h
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#define AssignmentExpressionSignedRightShiftNode_h
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#include "ExpressionNode.h"
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#include "AssignmentExpressionSimpleNode.h"
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namespace Escargot {
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// An assignment operator expression.
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class AssignmentExpressionSignedRightShiftNode : public ExpressionNode {
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public:
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AssignmentExpressionSignedRightShiftNode(Node* left, Node* right)
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: ExpressionNode()
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, m_left(left)
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, m_right(right)
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{
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}
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virtual ASTNodeType type() override { return ASTNodeType::AssignmentExpressionSignedRightShift; }
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virtual void generateExpressionByteCode(ByteCodeBlock* codeBlock, ByteCodeGenerateContext* context, ByteCodeRegisterIndex dstRegister) override
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{
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bool slowMode = AssignmentExpressionSimpleNode::isLeftReferenceExpressionRelatedWithRightExpression(m_left, m_right);
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bool flagBefore = context->m_canSkipCopyToRegister;
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if (slowMode) {
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context->m_canSkipCopyToRegister = false;
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}
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m_left->generateResolveAddressByteCode(codeBlock, context);
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m_left->generateReferenceResolvedAddressByteCode(codeBlock, context);
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size_t src0 = context->getLastRegisterIndex();
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size_t src1 = m_right->getRegister(codeBlock, context);
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m_right->generateExpressionByteCode(codeBlock, context, src1);
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context->giveUpRegister();
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context->giveUpRegister();
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codeBlock->pushCode(BinarySignedRightShift(ByteCodeLOC(m_loc.index), src0, src1, dstRegister), context, this);
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m_left->generateStoreByteCode(codeBlock, context, dstRegister, false);
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if (slowMode) {
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context->m_canSkipCopyToRegister = flagBefore;
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}
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}
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virtual ByteCodeRegisterIndex getRegister(ByteCodeBlock* codeBlock, ByteCodeGenerateContext* context) override
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{
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return m_left->getRegister(codeBlock, context);
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}
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virtual void iterateChildrenIdentifier(const std::function<void(AtomicString name, bool isAssignment)>& fn) override
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{
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m_left->iterateChildrenIdentifierAssigmentCase(fn);
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m_right->iterateChildrenIdentifier(fn);
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}
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virtual void iterateChildren(const std::function<void(Node* node)>& fn) override
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{
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fn(this);
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m_left->iterateChildren(fn);
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m_right->iterateChildren(fn);
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}
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private:
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Node* m_left; // left: Pattern;
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Node* m_right; // right: Expression;
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};
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}
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#endif
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