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187 lines (147 loc) · 7.62 KB
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/*
* Copyright (C) 2015-2016 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 "JITAddGenerator.h"
#include "ArithProfile.h"
#include "JITMathIC.h"
#include "LinkBuffer.h"
#if ENABLE(JIT)
namespace JSC {
JITMathICInlineResult JITAddGenerator::generateInline(CCallHelpers& jit, MathICGenerationState& state, const BinaryArithProfile* arithProfile)
{
// We default to speculating int32.
ObservedType lhs = ObservedType().withInt32();
ObservedType rhs = ObservedType().withInt32();
if (arithProfile) {
lhs = arithProfile->lhsObservedType();
rhs = arithProfile->rhsObservedType();
}
if (lhs.isOnlyNonNumber() && rhs.isOnlyNonNumber())
return JITMathICInlineResult::DontGenerate;
if ((lhs.isOnlyInt32() || m_leftOperand.isConstInt32()) && (rhs.isOnlyInt32() || m_rightOperand.isConstInt32())) {
ASSERT(!m_leftOperand.isConstInt32() || !m_rightOperand.isConstInt32());
if (!m_leftOperand.isConstInt32())
state.slowPathJumps.append(jit.branchIfNotInt32(m_left));
if (!m_rightOperand.isConstInt32())
state.slowPathJumps.append(jit.branchIfNotInt32(m_right));
GPRReg scratch = m_scratchGPR;
if (m_leftOperand.isConstInt32() || m_rightOperand.isConstInt32()) {
JSValueRegs var = m_leftOperand.isConstInt32() ? m_right : m_left;
int32_t constValue = m_leftOperand.isConstInt32() ? m_leftOperand.asConstInt32() : m_rightOperand.asConstInt32();
if (var.payloadGPR() != m_result.payloadGPR())
scratch = m_result.payloadGPR();
state.slowPathJumps.append(jit.branchAdd32(CCallHelpers::Overflow, var.payloadGPR(), CCallHelpers::Imm32(constValue), scratch));
} else {
if (m_left.payloadGPR() != m_result.payloadGPR() && m_right.payloadGPR() != m_result.payloadGPR())
scratch = m_result.payloadGPR();
state.slowPathJumps.append(jit.branchAdd32(CCallHelpers::Overflow, m_right.payloadGPR(), m_left.payloadGPR(), scratch));
}
jit.boxInt32(scratch, m_result);
return JITMathICInlineResult::GeneratedFastPath;
}
return JITMathICInlineResult::GenerateFullSnippet;
}
bool JITAddGenerator::generateFastPath(CCallHelpers& jit, CCallHelpers::JumpList& endJumpList, CCallHelpers::JumpList& slowPathJumpList, const BinaryArithProfile* arithProfile, bool shouldEmitProfiling)
{
ASSERT(m_scratchGPR != InvalidGPRReg);
ASSERT(m_scratchGPR != m_left.payloadGPR());
ASSERT(m_scratchGPR != m_right.payloadGPR());
#if USE(JSVALUE32_64)
ASSERT(m_scratchGPR != m_left.tagGPR());
ASSERT(m_scratchGPR != m_right.tagGPR());
ASSERT(m_scratchFPR != InvalidFPRReg);
#endif
ASSERT(!m_leftOperand.isConstInt32() || !m_rightOperand.isConstInt32());
if (!m_leftOperand.mightBeNumber() || !m_rightOperand.mightBeNumber())
return false;
if (m_leftOperand.isConstInt32() || m_rightOperand.isConstInt32()) {
JSValueRegs var = m_leftOperand.isConstInt32() ? m_right : m_left;
SnippetOperand& varOpr = m_leftOperand.isConstInt32() ? m_rightOperand : m_leftOperand;
SnippetOperand& constOpr = m_leftOperand.isConstInt32() ? m_leftOperand : m_rightOperand;
// Try to do intVar + intConstant.
CCallHelpers::Jump notInt32 = jit.branchIfNotInt32(var);
GPRReg scratch = m_scratchGPR;
if (var.payloadGPR() != m_result.payloadGPR())
scratch = m_result.payloadGPR();
slowPathJumpList.append(jit.branchAdd32(CCallHelpers::Overflow, var.payloadGPR(), CCallHelpers::Imm32(constOpr.asConstInt32()), scratch));
jit.boxInt32(scratch, m_result);
endJumpList.append(jit.jump());
if (!jit.supportsFloatingPoint()) {
slowPathJumpList.append(notInt32);
return true;
}
// Try to do doubleVar + double(intConstant).
notInt32.link(&jit);
if (!varOpr.definitelyIsNumber())
slowPathJumpList.append(jit.branchIfNotNumber(var, m_scratchGPR));
jit.unboxDoubleNonDestructive(var, m_leftFPR, m_scratchGPR, m_scratchFPR);
jit.move(CCallHelpers::Imm32(constOpr.asConstInt32()), m_scratchGPR);
jit.convertInt32ToDouble(m_scratchGPR, m_rightFPR);
// Fall thru to doubleVar + doubleVar.
} else {
ASSERT(!m_leftOperand.isConstInt32() && !m_rightOperand.isConstInt32());
CCallHelpers::Jump leftNotInt;
CCallHelpers::Jump rightNotInt;
// Try to do intVar + intVar.
leftNotInt = jit.branchIfNotInt32(m_left);
rightNotInt = jit.branchIfNotInt32(m_right);
GPRReg scratch = m_scratchGPR;
if (m_left.payloadGPR() != m_result.payloadGPR() && m_right.payloadGPR() != m_result.payloadGPR())
scratch = m_result.payloadGPR();
slowPathJumpList.append(jit.branchAdd32(CCallHelpers::Overflow, m_right.payloadGPR(), m_left.payloadGPR(), scratch));
jit.boxInt32(scratch, m_result);
endJumpList.append(jit.jump());
if (!jit.supportsFloatingPoint()) {
slowPathJumpList.append(leftNotInt);
slowPathJumpList.append(rightNotInt);
return true;
}
leftNotInt.link(&jit);
if (!m_leftOperand.definitelyIsNumber())
slowPathJumpList.append(jit.branchIfNotNumber(m_left, m_scratchGPR));
if (!m_rightOperand.definitelyIsNumber())
slowPathJumpList.append(jit.branchIfNotNumber(m_right, m_scratchGPR));
jit.unboxDoubleNonDestructive(m_left, m_leftFPR, m_scratchGPR, m_scratchFPR);
CCallHelpers::Jump rightIsDouble = jit.branchIfNotInt32(m_right);
jit.convertInt32ToDouble(m_right.payloadGPR(), m_rightFPR);
CCallHelpers::Jump rightWasInteger = jit.jump();
rightNotInt.link(&jit);
if (!m_rightOperand.definitelyIsNumber())
slowPathJumpList.append(jit.branchIfNotNumber(m_right, m_scratchGPR));
jit.convertInt32ToDouble(m_left.payloadGPR(), m_leftFPR);
rightIsDouble.link(&jit);
jit.unboxDoubleNonDestructive(m_right, m_rightFPR, m_scratchGPR, m_scratchFPR);
rightWasInteger.link(&jit);
// Fall thru to doubleVar + doubleVar.
}
// Do doubleVar + doubleVar.
jit.addDouble(m_rightFPR, m_leftFPR);
if (arithProfile && shouldEmitProfiling)
arithProfile->emitSetDouble(jit);
jit.boxDouble(m_leftFPR, m_result);
return true;
}
} // namespace JSC
#endif // ENABLE(JIT)