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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef jit_arm_CodeGenerator_arm_h
#define jit_arm_CodeGenerator_arm_h
#include "jit/arm/Assembler-arm.h"
#include "jit/shared/CodeGenerator-shared.h"
#include "js/ScalarType.h" // js::Scalar::Type
namespace js {
namespace jit {
class CodeGeneratorARM;
class OutOfLineBailout;
class OutOfLineTableSwitch;
using OutOfLineWasmTruncateCheck =
OutOfLineWasmTruncateCheckBase<CodeGeneratorARM>;
class CodeGeneratorARM : public CodeGeneratorShared {
friend class MoveResolverARM;
protected:
CodeGeneratorARM(MIRGenerator* gen, LIRGraph* graph, MacroAssembler* masm);
NonAssertingLabel deoptLabel_;
MoveOperand toMoveOperand(LAllocation a) const;
void bailoutIf(Assembler::Condition condition, LSnapshot* snapshot);
void bailoutFrom(Label* label, LSnapshot* snapshot);
void bailout(LSnapshot* snapshot);
template <typename T1, typename T2>
void bailoutCmpPtr(Assembler::Condition c, T1 lhs, T2 rhs,
LSnapshot* snapshot) {
masm.cmpPtr(lhs, rhs);
bailoutIf(c, snapshot);
}
void bailoutTestPtr(Assembler::Condition c, Register lhs, Register rhs,
LSnapshot* snapshot) {
masm.testPtr(lhs, rhs);
bailoutIf(c, snapshot);
}
template <typename T1, typename T2>
void bailoutCmp32(Assembler::Condition c, T1 lhs, T2 rhs,
LSnapshot* snapshot) {
masm.cmp32(lhs, rhs);
bailoutIf(c, snapshot);
}
template <typename T1, typename T2>
void bailoutTest32(Assembler::Condition c, T1 lhs, T2 rhs,
LSnapshot* snapshot) {
masm.test32(lhs, rhs);
bailoutIf(c, snapshot);
}
void bailoutIfFalseBool(Register reg, LSnapshot* snapshot) {
masm.test32(reg, Imm32(0xFF));
bailoutIf(Assembler::Zero, snapshot);
}
template <class T>
void generateUDivModZeroCheck(Register rhs, Register output, Label* done,
LSnapshot* snapshot, T* mir);
bool generateOutOfLineCode();
// Emits a branch that directs control flow to the true block if |cond| is
// true, and the false block if |cond| is false.
void emitBranch(Assembler::Condition cond, MBasicBlock* ifTrue,
MBasicBlock* ifFalse);
void testNullEmitBranch(Assembler::Condition cond, const ValueOperand& value,
MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
cond = masm.testNull(cond, value);
emitBranch(cond, ifTrue, ifFalse);
}
void testUndefinedEmitBranch(Assembler::Condition cond,
const ValueOperand& value, MBasicBlock* ifTrue,
MBasicBlock* ifFalse) {
cond = masm.testUndefined(cond, value);
emitBranch(cond, ifTrue, ifFalse);
}
void testObjectEmitBranch(Assembler::Condition cond,
const ValueOperand& value, MBasicBlock* ifTrue,
MBasicBlock* ifFalse) {
cond = masm.testObject(cond, value);
emitBranch(cond, ifTrue, ifFalse);
}
void testZeroEmitBranch(Assembler::Condition cond, Register reg,
MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
MOZ_ASSERT(cond == Assembler::Equal || cond == Assembler::NotEqual);
masm.cmpPtr(reg, ImmWord(0));
emitBranch(cond, ifTrue, ifFalse);
}
void emitTableSwitchDispatch(MTableSwitch* mir, Register index,
Register base);
void emitBigIntDiv(LBigIntDiv* ins, Register dividend, Register divisor,
Register output, Label* fail);
void emitBigIntMod(LBigIntMod* ins, Register dividend, Register divisor,
Register output, Label* fail);
template <typename T>
void emitWasmLoad(T* ins);
template <typename T>
void emitWasmUnalignedLoad(T* ins);
template <typename T>
void emitWasmStore(T* ins);
template <typename T>
void emitWasmUnalignedStore(T* ins);
ValueOperand ToValue(LInstruction* ins, size_t pos);
ValueOperand ToTempValue(LInstruction* ins, size_t pos);
Register64 ToOperandOrRegister64(const LInt64Allocation input);
// Functions for LTestVAndBranch.
void splitTagForTest(const ValueOperand& value, ScratchTagScope& tag);
void divICommon(MDiv* mir, Register lhs, Register rhs, Register output,
LSnapshot* snapshot, Label& done);
void modICommon(MMod* mir, Register lhs, Register rhs, Register output,
LSnapshot* snapshot, Label& done);
void generateInvalidateEpilogue();
// Generating a result.
template <typename S, typename T>
void atomicBinopToTypedIntArray(AtomicOp op, Scalar::Type arrayType,
const S& value, const T& mem,
Register flagTemp, Register outTemp,
AnyRegister output);
// Generating no result.
template <typename S, typename T>
void atomicBinopToTypedIntArray(AtomicOp op, Scalar::Type arrayType,
const S& value, const T& mem,
Register flagTemp);
public:
void visitOutOfLineBailout(OutOfLineBailout* ool);
void visitOutOfLineTableSwitch(OutOfLineTableSwitch* ool);
void visitOutOfLineWasmTruncateCheck(OutOfLineWasmTruncateCheck* ool);
};
typedef CodeGeneratorARM CodeGeneratorSpecific;
// An out-of-line bailout thunk.
class OutOfLineBailout : public OutOfLineCodeBase<CodeGeneratorARM> {
protected: // Silence Clang warning.
LSnapshot* snapshot_;
uint32_t frameSize_;
public:
OutOfLineBailout(LSnapshot* snapshot, uint32_t frameSize)
: snapshot_(snapshot), frameSize_(frameSize) {}
void accept(CodeGeneratorARM* codegen) override;
LSnapshot* snapshot() const { return snapshot_; }
};
} // namespace jit
} // namespace js
#endif /* jit_arm_CodeGenerator_arm_h */