2017-08-12 16:48:01 +00:00
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/*
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2022-10-23 02:55:20 +00:00
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* Copyright (C) 2015-2019 Apple Inc. All rights reserved.
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2017-08-12 16:48:01 +00:00
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "JITBitAndGenerator.h"
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#if ENABLE(JIT)
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namespace JSC {
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void JITBitAndGenerator::generateFastPath(CCallHelpers& jit)
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{
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#if USE(JSVALUE64)
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ASSERT(m_scratchGPR != InvalidGPRReg);
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ASSERT(m_scratchGPR != m_left.payloadGPR());
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ASSERT(m_scratchGPR != m_right.payloadGPR());
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#else
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UNUSED_PARAM(m_scratchGPR);
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#endif
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ASSERT(!m_leftOperand.isConstInt32() || !m_rightOperand.isConstInt32());
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m_didEmitFastPath = true;
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if (m_leftOperand.isConstInt32() || m_rightOperand.isConstInt32()) {
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JSValueRegs var = m_leftOperand.isConstInt32() ? m_right : m_left;
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SnippetOperand& constOpr = m_leftOperand.isConstInt32() ? m_leftOperand : m_rightOperand;
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// Try to do intVar & intConstant.
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m_slowPathJumpList.append(jit.branchIfNotInt32(var));
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jit.moveValueRegs(var, m_result);
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if (constOpr.asConstInt32() != static_cast<int32_t>(0xffffffff)) {
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#if USE(JSVALUE64)
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jit.and64(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
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if (constOpr.asConstInt32() >= 0)
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2022-10-23 02:55:20 +00:00
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jit.or64(GPRInfo::numberTagRegister, m_result.payloadGPR());
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2017-08-12 16:48:01 +00:00
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#else
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jit.and32(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
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#endif
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}
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} else {
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ASSERT(!m_leftOperand.isConstInt32() && !m_rightOperand.isConstInt32());
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// Try to do intVar & intVar.
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#if USE(JSVALUE64)
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jit.move(m_left.payloadGPR(), m_scratchGPR);
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jit.and64(m_right.payloadGPR(), m_scratchGPR);
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m_slowPathJumpList.append(jit.branchIfNotInt32(m_scratchGPR));
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jit.move(m_scratchGPR, m_result.payloadGPR());
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#else
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m_slowPathJumpList.append(jit.branchIfNotInt32(m_left));
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m_slowPathJumpList.append(jit.branchIfNotInt32(m_right));
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jit.moveValueRegs(m_left, m_result);
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jit.and32(m_right.payloadGPR(), m_result.payloadGPR());
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#endif
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}
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}
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} // namespace JSC
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#endif // ENABLE(JIT)
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