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/*
* Copyright (C) 2008-2019 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"
#if ENABLE(JIT)
#if USE(JSVALUE32_64)
#include "JIT.h"
#include "CodeBlock.h"
#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "Interpreter.h"
#include "JSCInlines.h"
#include "ResultType.h"
#include "SlowPathCall.h"
namespace JSC {
template <typename Op>
void JIT::emit_compareAndJump(const Instruction* instruction, RelationalCondition condition)
{
JumpList notInt32Op1;
JumpList notInt32Op2;
auto bytecode = instruction->as<Op>();
int op1 = bytecode.m_lhs.offset();
int op2 = bytecode.m_rhs.offset();
unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
// Character less.
if (isOperandConstantChar(op1)) {
emitLoad(op2, regT1, regT0);
addSlowCase(branchIfNotCell(regT1));
JumpList failures;
emitLoadCharacterString(regT0, regT0, failures);
addSlowCase(failures);
addJump(branch32(commute(condition), regT0, Imm32(asString(getConstantOperand(op1))->tryGetValue()[0])), target);
return;
}
if (isOperandConstantChar(op2)) {
emitLoad(op1, regT1, regT0);
addSlowCase(branchIfNotCell(regT1));
JumpList failures;
emitLoadCharacterString(regT0, regT0, failures);
addSlowCase(failures);
addJump(branch32(condition, regT0, Imm32(asString(getConstantOperand(op2))->tryGetValue()[0])), target);
return;
}
if (isOperandConstantInt(op1)) {
emitLoad(op2, regT3, regT2);
notInt32Op2.append(branchIfNotInt32(regT3));
addJump(branch32(commute(condition), regT2, Imm32(getConstantOperand(op1).asInt32())), target);
} else if (isOperandConstantInt(op2)) {
emitLoad(op1, regT1, regT0);
notInt32Op1.append(branchIfNotInt32(regT1));
addJump(branch32(condition, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
} else {
emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
notInt32Op1.append(branchIfNotInt32(regT1));
notInt32Op2.append(branchIfNotInt32(regT3));
addJump(branch32(condition, regT0, regT2), target);
}
if (!supportsFloatingPoint()) {
addSlowCase(notInt32Op1);
addSlowCase(notInt32Op2);
return;
}
Jump end = jump();
// Double less.
emitBinaryDoubleOp<Op>(instruction, OperandTypes(), notInt32Op1, notInt32Op2, !isOperandConstantInt(op1), isOperandConstantInt(op1) || !isOperandConstantInt(op2));
end.link(this);
}
template <typename Op>
void JIT::emit_compareUnsignedAndJump(const Instruction* instruction, RelationalCondition condition)
{
auto bytecode = instruction->as<Op>();
int op1 = bytecode.m_lhs.offset();
int op2 = bytecode.m_rhs.offset();
unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
if (isOperandConstantInt(op1)) {
emitLoad(op2, regT3, regT2);
addJump(branch32(commute(condition), regT2, Imm32(getConstantOperand(op1).asInt32())), target);
} else if (isOperandConstantInt(op2)) {
emitLoad(op1, regT1, regT0);
addJump(branch32(condition, regT0, Imm32(getConstantOperand(op2).asInt32())), target);
} else {
emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
addJump(branch32(condition, regT0, regT2), target);
}
}
template <typename Op>
void JIT::emit_compareUnsigned(const Instruction* instruction, RelationalCondition condition)
{
auto bytecode = instruction->as<Op>();
int dst = bytecode.m_dst.offset();
int op1 = bytecode.m_lhs.offset();
int op2 = bytecode.m_rhs.offset();
if (isOperandConstantInt(op1)) {
emitLoad(op2, regT3, regT2);
compare32(commute(condition), regT2, Imm32(getConstantOperand(op1).asInt32()), regT0);
} else if (isOperandConstantInt(op2)) {
emitLoad(op1, regT1, regT0);
compare32(condition, regT0, Imm32(getConstantOperand(op2).asInt32()), regT0);
} else {
emitLoad2(op1, regT1, regT0, op2, regT3, regT2);
compare32(condition, regT0, regT2, regT0);
}
emitStoreBool(dst, regT0);
}
template <typename Op>
void JIT::emit_compareAndJumpSlow(const Instruction *instruction, DoubleCondition, size_t (JIT_OPERATION *operation)(ExecState*, EncodedJSValue, EncodedJSValue), bool invert, Vector<SlowCaseEntry>::iterator& iter)
{
auto bytecode = instruction->as<Op>();
int op1 = bytecode.m_lhs.offset();
int op2 = bytecode.m_rhs.offset();
unsigned target = jumpTarget(instruction, bytecode.m_targetLabel);
linkAllSlowCases(iter);
emitLoad(op1, regT1, regT0);
emitLoad(op2, regT3, regT2);
callOperation(operation, JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2));
emitJumpSlowToHot(branchTest32(invert ? Zero : NonZero, returnValueGPR), target);
}
void JIT::emit_op_unsigned(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpUnsigned>();
int result = bytecode.m_dst.offset();
int op1 = bytecode.m_operand.offset();
emitLoad(op1, regT1, regT0);
addSlowCase(branchIfNotInt32(regT1));
addSlowCase(branch32(LessThan, regT0, TrustedImm32(0)));
emitStoreInt32(result, regT0, result == op1);
}
void JIT::emit_op_inc(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInc>();
int srcDst = bytecode.m_srcDst.offset();
emitLoad(srcDst, regT1, regT0);
addSlowCase(branchIfNotInt32(regT1));
addSlowCase(branchAdd32(Overflow, TrustedImm32(1), regT0));
emitStoreInt32(srcDst, regT0, true);
}
void JIT::emit_op_dec(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDec>();
int srcDst = bytecode.m_srcDst.offset();
emitLoad(srcDst, regT1, regT0);
addSlowCase(branchIfNotInt32(regT1));
addSlowCase(branchSub32(Overflow, TrustedImm32(1), regT0));
emitStoreInt32(srcDst, regT0, true);
}
template <typename Op>
void JIT::emitBinaryDoubleOp(const Instruction *instruction, OperandTypes types, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters, bool op2IsInRegisters)
{
JumpList end;
auto bytecode = instruction->as<Op>();
int opcodeID = Op::opcodeID;
int target = jumpTarget(instruction, bytecode.m_targetLabel);
int op1 = bytecode.m_lhs.offset();
int op2 = bytecode.m_rhs.offset();
if (!notInt32Op1.empty()) {
// Double case 1: Op1 is not int32; Op2 is unknown.
notInt32Op1.link(this);
ASSERT(op1IsInRegisters);
// Verify Op1 is double.
if (!types.first().definitelyIsNumber())
addSlowCase(branch32(Above, regT1, TrustedImm32(JSValue::LowestTag)));
if (!op2IsInRegisters)
emitLoad(op2, regT3, regT2);
Jump doubleOp2 = branch32(Below, regT3, TrustedImm32(JSValue::LowestTag));
if (!types.second().definitelyIsNumber())
addSlowCase(branchIfNotInt32(regT3));
convertInt32ToDouble(regT2, fpRegT0);
Jump doTheMath = jump();
// Load Op2 as double into double register.
doubleOp2.link(this);
emitLoadDouble(op2, fpRegT0);
// Do the math.
doTheMath.link(this);
switch (opcodeID) {
case op_jless:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleLessThan, fpRegT2, fpRegT0), target);
break;
case op_jlesseq:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleLessThanOrEqual, fpRegT2, fpRegT0), target);
break;
case op_jgreater:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleGreaterThan, fpRegT2, fpRegT0), target);
break;
case op_jgreatereq:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleGreaterThanOrEqual, fpRegT2, fpRegT0), target);
break;
case op_jnless:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT0, fpRegT2), target);
break;
case op_jnlesseq:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleLessThanOrUnordered, fpRegT0, fpRegT2), target);
break;
case op_jngreater:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleGreaterThanOrEqualOrUnordered, fpRegT0, fpRegT2), target);
break;
case op_jngreatereq:
emitLoadDouble(op1, fpRegT2);
addJump(branchDouble(DoubleGreaterThanOrUnordered, fpRegT0, fpRegT2), target);
break;
default:
RELEASE_ASSERT_NOT_REACHED();
}
if (!notInt32Op2.empty())
end.append(jump());
}
if (!notInt32Op2.empty()) {
// Double case 2: Op1 is int32; Op2 is not int32.
notInt32Op2.link(this);
ASSERT(op2IsInRegisters);
if (!op1IsInRegisters)
emitLoadPayload(op1, regT0);
convertInt32ToDouble(regT0, fpRegT0);
// Verify op2 is double.
if (!types.second().definitelyIsNumber())
addSlowCase(branch32(Above, regT3, TrustedImm32(JSValue::LowestTag)));
// Do the math.
switch (opcodeID) {
case op_jless:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleLessThan, fpRegT0, fpRegT1), target);
break;
case op_jlesseq:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleLessThanOrEqual, fpRegT0, fpRegT1), target);
break;
case op_jgreater:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleGreaterThan, fpRegT0, fpRegT1), target);
break;
case op_jgreatereq:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleGreaterThanOrEqual, fpRegT0, fpRegT1), target);
break;
case op_jnless:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleLessThanOrEqualOrUnordered, fpRegT1, fpRegT0), target);
break;
case op_jnlesseq:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleLessThanOrUnordered, fpRegT1, fpRegT0), target);
break;
case op_jngreater:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleGreaterThanOrEqualOrUnordered, fpRegT1, fpRegT0), target);
break;
case op_jngreatereq:
emitLoadDouble(op2, fpRegT1);
addJump(branchDouble(DoubleGreaterThanOrUnordered, fpRegT1, fpRegT0), target);
break;
default:
RELEASE_ASSERT_NOT_REACHED();
}
}
end.link(this);
}
// Mod (%)
/* ------------------------------ BEGIN: OP_MOD ------------------------------ */
void JIT::emit_op_mod(const Instruction* currentInstruction)
{
JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_mod);
slowPathCall.call();
}
void JIT::emitSlow_op_mod(const Instruction*, Vector<SlowCaseEntry>::iterator&)
{
// We would have really useful assertions here if it wasn't for the compiler's
// insistence on attribute noreturn.
// RELEASE_ASSERT_NOT_REACHED();
}
/* ------------------------------ END: OP_MOD ------------------------------ */
} // namespace JSC
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)