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/*
* Copyright (C) 2015-2019 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 INC. OR
* 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.
*/
#include "config.h"
#include "JITBitXorGenerator.h"
#if ENABLE(JIT)
namespace JSC {
void JITBitXorGenerator::generateFastPath(CCallHelpers& jit)
{
ASSERT(!m_leftOperand.isConstInt32() || !m_rightOperand.isConstInt32());
m_didEmitFastPath = true;
if (m_leftOperand.isConstInt32() || m_rightOperand.isConstInt32()) {
JSValueRegs var = m_leftOperand.isConstInt32() ? m_right : m_left;
SnippetOperand& constOpr = m_leftOperand.isConstInt32() ? m_leftOperand : m_rightOperand;
// Try to do intVar ^ intConstant.
m_slowPathJumpList.append(jit.branchIfNotInt32(var));
#if USE(JSVALUE64)
jit.xor32(CCallHelpers::Imm32(constOpr.asConstInt32()), var.payloadGPR(), m_result.payloadGPR());
jit.or64(GPRInfo::numberTagRegister, m_result.payloadGPR());
#else
jit.moveValueRegs(var, m_result);
jit.xor32(CCallHelpers::Imm32(constOpr.asConstInt32()), m_result.payloadGPR());
#endif
return;
}
#if USE(JSVALUE64)
if (m_leftOperand.definitelyIsBoolean() && m_rightOperand.definitelyIsBoolean()) {
jit.xor32(m_left.payloadGPR(), m_right.payloadGPR(), m_result.payloadGPR());
jit.and32(CCallHelpers::TrustedImm32(1), m_result.payloadGPR());
jit.or64(GPRInfo::numberTagRegister, m_result.payloadGPR());
return;
}
#endif
ASSERT(!m_leftOperand.isConstInt32() && !m_rightOperand.isConstInt32());
// Try to do intVar ^ intVar.
m_slowPathJumpList.append(jit.branchIfNotInt32(m_left));
m_slowPathJumpList.append(jit.branchIfNotInt32(m_right));
#if USE(JSVALUE64)
jit.xor32(m_right.payloadGPR(), m_left.payloadGPR(), m_result.payloadGPR());
jit.or64(GPRInfo::numberTagRegister, m_result.payloadGPR());
#else
jit.moveValueRegs(m_left, m_result);
jit.xor32(m_right.payloadGPR(), m_result.payloadGPR());
#endif
}
} // namespace JSC
#endif // ENABLE(JIT)
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