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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_riscv64_CodeGenerator_riscv64_h
#define jit_riscv64_CodeGenerator_riscv64_h
#include "jit/riscv64/Assembler-riscv64.h"
#include "jit/riscv64/MacroAssembler-riscv64.h"
#include "jit/shared/CodeGenerator-shared.h"
namespace js {
namespace jit {
class CodeGeneratorRiscv64;
class OutOfLineBailout;
class OutOfLineTableSwitch;
using OutOfLineWasmTruncateCheck =
OutOfLineWasmTruncateCheckBase<CodeGeneratorRiscv64>;
class CodeGeneratorRiscv64 : public CodeGeneratorShared {
friend class MoveResolverLA;
protected:
CodeGeneratorRiscv64(MIRGenerator* gen, LIRGraph* graph,
MacroAssembler* masm);
NonAssertingLabel deoptLabel_;
Operand ToOperand(const LAllocation& a);
Operand ToOperand(const LAllocation* a);
Operand ToOperand(const LDefinition* def);
#ifdef JS_PUNBOX64
Operand ToOperandOrRegister64(const LInt64Allocation input);
#else
Register64 ToOperandOrRegister64(const LInt64Allocation input);
#endif
MoveOperand toMoveOperand(LAllocation a) const;
template <typename T1, typename T2>
void bailoutCmp32(Assembler::Condition c, T1 lhs, T2 rhs,
LSnapshot* snapshot) {
Label bail;
masm.branch32(c, lhs, rhs, &bail);
bailoutFrom(&bail, snapshot);
}
template <typename T1, typename T2>
void bailoutTest32(Assembler::Condition c, T1 lhs, T2 rhs,
LSnapshot* snapshot) {
Label bail;
masm.branchTest32(c, lhs, rhs, &bail);
bailoutFrom(&bail, snapshot);
}
template <typename T1, typename T2>
void bailoutCmpPtr(Assembler::Condition c, T1 lhs, T2 rhs,
LSnapshot* snapshot) {
Label bail;
masm.branchPtr(c, lhs, rhs, &bail);
bailoutFrom(&bail, snapshot);
}
void bailoutTestPtr(Assembler::Condition c, Register lhs, Register rhs,
LSnapshot* snapshot) {
// TODO(riscv64) Didn't use branchTestPtr due to '-Wundefined-inline'.
MOZ_ASSERT(c == Assembler::Zero || c == Assembler::NonZero ||
c == Assembler::Signed || c == Assembler::NotSigned);
Label bail;
if (lhs == rhs) {
masm.ma_b(lhs, rhs, &bail, c);
} else {
ScratchRegisterScope scratch(masm);
masm.and_(scratch, lhs, rhs);
masm.ma_b(scratch, scratch, &bail, c);
}
bailoutFrom(&bail, snapshot);
}
void bailoutIfFalseBool(Register reg, LSnapshot* snapshot) {
Label bail;
ScratchRegisterScope scratch(masm);
masm.ma_and(scratch, reg, Imm32(0xFF));
masm.ma_b(scratch, scratch, &bail, Assembler::Zero);
bailoutFrom(&bail, snapshot);
}
void bailoutFrom(Label* label, LSnapshot* snapshot);
void bailout(LSnapshot* snapshot);
bool generateOutOfLineCode();
template <typename T>
void branchToBlock(Register lhs, T rhs, MBasicBlock* mir,
Assembler::Condition cond) {
masm.ma_b(lhs, rhs, skipTrivialBlocks(mir)->lir()->label(), cond);
}
void branchToBlock(FloatFormat fmt, FloatRegister lhs, FloatRegister rhs,
MBasicBlock* mir, Assembler::DoubleCondition cond);
// Emits a branch that directs control flow to the true block if |cond| is
// true, and the false block if |cond| is false.
template <typename T>
void emitBranch(Register lhs, T rhs, Assembler::Condition cond,
MBasicBlock* mirTrue, MBasicBlock* mirFalse) {
if (isNextBlock(mirFalse->lir())) {
branchToBlock(lhs, rhs, mirTrue, cond);
} else {
branchToBlock(lhs, rhs, mirFalse, Assembler::InvertCondition(cond));
jumpToBlock(mirTrue);
}
}
void testZeroEmitBranch(Assembler::Condition cond, Register reg,
MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
emitBranch(reg, Imm32(0), cond, ifTrue, ifFalse);
}
void emitTableSwitchDispatch(MTableSwitch* mir, Register index,
Register base);
template <typename T>
void emitWasmLoad(T* ins);
template <typename T>
void emitWasmStore(T* ins);
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,
Register valueTemp, Register offsetTemp,
Register maskTemp, 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, Register valueTemp,
Register offsetTemp, Register maskTemp);
public:
// Out of line visitors.
void visitOutOfLineBailout(OutOfLineBailout* ool);
void visitOutOfLineTableSwitch(OutOfLineTableSwitch* ool);
void visitOutOfLineWasmTruncateCheck(OutOfLineWasmTruncateCheck* ool);
protected:
void testNullEmitBranch(Assembler::Condition cond, const ValueOperand& value,
MBasicBlock* ifTrue, MBasicBlock* ifFalse) {
UseScratchRegisterScope temps(&masm);
Register scratch = temps.Acquire();
masm.splitTag(value.valueReg(), scratch);
emitBranch(scratch, ImmTag(JSVAL_TAG_NULL), cond, ifTrue, ifFalse);
}
void testUndefinedEmitBranch(Assembler::Condition cond,
const ValueOperand& value, MBasicBlock* ifTrue,
MBasicBlock* ifFalse) {
UseScratchRegisterScope temps(&masm);
Register scratch = temps.Acquire();
masm.splitTag(value.valueReg(), scratch);
emitBranch(scratch, ImmTag(JSVAL_TAG_UNDEFINED), cond, ifTrue, ifFalse);
}
void testObjectEmitBranch(Assembler::Condition cond,
const ValueOperand& value, MBasicBlock* ifTrue,
MBasicBlock* ifFalse) {
UseScratchRegisterScope temps(&masm);
Register scratch = temps.Acquire();
masm.splitTag(value.valueReg(), scratch);
emitBranch(scratch, ImmTag(JSVAL_TAG_OBJECT), cond, ifTrue, ifFalse);
}
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 emitWasmLoadI64(T* ins);
template <typename T>
void emitWasmStoreI64(T* ins);
ValueOperand ToValue(LInstruction* ins, size_t pos);
ValueOperand ToTempValue(LInstruction* ins, size_t pos);
// Functions for LTestVAndBranch.
void splitTagForTest(const ValueOperand& value, ScratchTagScope& tag);
};
typedef CodeGeneratorRiscv64 CodeGeneratorSpecific;
// An out-of-line bailout thunk.
class OutOfLineBailout : public OutOfLineCodeBase<CodeGeneratorRiscv64> {
protected:
LSnapshot* snapshot_;
public:
OutOfLineBailout(LSnapshot* snapshot) : snapshot_(snapshot) {}
void accept(CodeGeneratorRiscv64* codegen) override;
LSnapshot* snapshot() const { return snapshot_; }
};
} // namespace jit
} // namespace js
#endif /* jit_riscv64_CodeGenerator_riscv64_h */
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