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//===- HexagonInstPrinter.cpp - Convert Hexagon MCInst to assembly syntax -===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This class prints an Hexagon MCInst to a .s file.
//
//===----------------------------------------------------------------------===//
#include "HexagonInstPrinter.h"
#include "HexagonAsmPrinter.h"
#include "MCTargetDesc/HexagonBaseInfo.h"
#include "MCTargetDesc/HexagonMCInstrInfo.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
#define DEBUG_TYPE "asm-printer"
#define GET_INSTRUCTION_NAME
#include "HexagonGenAsmWriter.inc"
HexagonInstPrinter::HexagonInstPrinter(MCAsmInfo const &MAI,
MCInstrInfo const &MII,
MCRegisterInfo const &MRI)
: MCInstPrinter(MAI, MII, MRI), MII(MII), HasExtender(false) {
}
StringRef HexagonInstPrinter::getOpcodeName(unsigned Opcode) const {
return MII.getName(Opcode);
}
void HexagonInstPrinter::printRegName(raw_ostream &O, unsigned RegNo) const {
O << getRegName(RegNo);
}
StringRef HexagonInstPrinter::getRegName(unsigned RegNo) const {
return getRegisterName(RegNo);
}
void HexagonInstPrinter::setExtender(MCInst const &MCI) {
HasExtender = HexagonMCInstrInfo::isImmext(MCI);
}
void HexagonInstPrinter::printInst(const MCInst *MI, raw_ostream &OS,
StringRef Annot, const MCSubtargetInfo &STI) {
assert(HexagonMCInstrInfo::isBundle(*MI));
assert(HexagonMCInstrInfo::bundleSize(*MI) <= HEXAGON_PACKET_SIZE);
assert(HexagonMCInstrInfo::bundleSize(*MI) > 0);
HasExtender = false;
for (auto const &I : HexagonMCInstrInfo::bundleInstructions(*MI)) {
MCInst const &MCI = *I.getInst();
if (HexagonMCInstrInfo::isDuplex(MII, MCI)) {
printInstruction(MCI.getOperand(1).getInst(), OS);
OS << '\v';
HasExtender = false;
printInstruction(MCI.getOperand(0).getInst(), OS);
} else
printInstruction(&MCI, OS);
setExtender(MCI);
OS << "\n";
}
bool IsLoop0 = HexagonMCInstrInfo::isInnerLoop(*MI);
bool IsLoop1 = HexagonMCInstrInfo::isOuterLoop(*MI);
if (IsLoop0) {
OS << (IsLoop1 ? " :endloop01" : " :endloop0");
} else if (IsLoop1) {
OS << " :endloop1";
}
}
void HexagonInstPrinter::printOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
if (HexagonMCInstrInfo::getExtendableOp(MII, *MI) == OpNo &&
(HasExtender || HexagonMCInstrInfo::isConstExtended(MII, *MI)))
O << "#";
MCOperand const &MO = MI->getOperand(OpNo);
if (MO.isReg()) {
O << getRegisterName(MO.getReg());
} else if (MO.isExpr()) {
int64_t Value;
if (MO.getExpr()->evaluateAsAbsolute(Value))
O << formatImm(Value);
else
O << *MO.getExpr();
} else {
llvm_unreachable("Unknown operand");
}
}
void HexagonInstPrinter::printExtOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printUnsignedImmOperand(MCInst const *MI,
unsigned OpNo,
raw_ostream &O) const {
O << MI->getOperand(OpNo).getImm();
}
void HexagonInstPrinter::printNegImmOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
O << -MI->getOperand(OpNo).getImm();
}
void HexagonInstPrinter::printNOneImmOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
O << -1;
}
void HexagonInstPrinter::printGlobalOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printJumpTable(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printConstantPool(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printBranchOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
// Branches can take an immediate operand. This is used by the branch
// selection pass to print $+8, an eight byte displacement from the PC.
llvm_unreachable("Unknown branch operand.");
}
void HexagonInstPrinter::printCallOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {}
void HexagonInstPrinter::printAbsAddrOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {}
void HexagonInstPrinter::printPredicateOperand(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {}
void HexagonInstPrinter::printSymbol(MCInst const *MI, unsigned OpNo,
raw_ostream &O, bool hi) const {
assert(MI->getOperand(OpNo).isImm() && "Unknown symbol operand");
O << '#' << (hi ? "HI" : "LO") << '(';
O << '#';
printOperand(MI, OpNo, O);
O << ')';
}
void HexagonInstPrinter::printBrtarget(MCInst const *MI, unsigned OpNo,
raw_ostream &O) const {
MCOperand const &MO = MI->getOperand(OpNo);
assert (MO.isExpr());
MCExpr const &Expr = *MO.getExpr();
int64_t Value;
if (Expr.evaluateAsAbsolute(Value))
O << format("0x%" PRIx64, Value);
else {
if (HasExtender || HexagonMCInstrInfo::isConstExtended(MII, *MI))
if (HexagonMCInstrInfo::getExtendableOp(MII, *MI) == OpNo)
O << "##";
O << Expr;
}
}
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