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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.
//
//===----------------------------------------------------------------------===//
#define DEBUG_TYPE "asm-printer"
#include "Hexagon.h"
#include "HexagonAsmPrinter.h"
#include "HexagonInstPrinter.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdio>
using namespace llvm;
#define GET_INSTRUCTION_NAME
#include "HexagonGenAsmWriter.inc"
StringRef HexagonInstPrinter::getOpcodeName(unsigned Opcode) const {
return MII.getName(Opcode);
}
StringRef HexagonInstPrinter::getRegName(unsigned RegNo) const {
return getRegisterName(RegNo);
}
void HexagonInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
StringRef Annot) {
const char packetPadding[] = " ";
const char startPacket = '{',
endPacket = '}';
// TODO: add outer HW loop when it's supported too.
if (MI->getOpcode() == Hexagon::ENDLOOP0) {
MCInst Nop;
O << packetPadding << startPacket << '\n';
Nop.setOpcode(Hexagon::NOP);
printInstruction(&Nop, O);
O << packetPadding << endPacket;
}
printInstruction(MI, O);
printAnnotation(O, Annot);
}
void HexagonInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
const MCOperand& MO = MI->getOperand(OpNo);
if (MO.isReg()) {
O << getRegisterName(MO.getReg());
} else if(MO.isExpr()) {
O << *MO.getExpr();
} else if(MO.isImm()) {
printImmOperand(MI, OpNo, O);
} else {
assert(false && "Unknown operand");
}
}
void HexagonInstPrinter::printImmOperand
(const MCInst *MI, unsigned OpNo, raw_ostream &O) const {
O << MI->getOperand(OpNo).getImm();
}
void HexagonInstPrinter::printExtOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
O << MI->getOperand(OpNo).getImm();
}
void HexagonInstPrinter::printUnsignedImmOperand
(const MCInst *MI, unsigned OpNo, raw_ostream &O) const {
O << MI->getOperand(OpNo).getImm();
}
void HexagonInstPrinter::printNegImmOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
O << -MI->getOperand(OpNo).getImm();
}
void HexagonInstPrinter::printNOneImmOperand
(const MCInst *MI, unsigned OpNo, raw_ostream &O) const {
O << -1;
}
void HexagonInstPrinter::printMEMriOperand
(const MCInst *MI, unsigned OpNo, raw_ostream &O) const {
const MCOperand& MO0 = MI->getOperand(OpNo);
const MCOperand& MO1 = MI->getOperand(OpNo + 1);
O << getRegisterName(MO0.getReg());
O << " + #" << MO1.getImm();
}
void HexagonInstPrinter::printFrameIndexOperand
(const MCInst *MI, unsigned OpNo, raw_ostream &O) const {
const MCOperand& MO0 = MI->getOperand(OpNo);
const MCOperand& MO1 = MI->getOperand(OpNo + 1);
O << getRegisterName(MO0.getReg()) << ", #" << MO1.getImm();
}
void HexagonInstPrinter::printGlobalOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printJumpTable(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printConstantPool(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
printOperand(MI, OpNo, O);
}
void HexagonInstPrinter::printBranchOperand(const MCInst *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.
assert("Unknown branch operand.");
}
void HexagonInstPrinter::printCallOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
}
void HexagonInstPrinter::printAbsAddrOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
}
void HexagonInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNo,
raw_ostream &O) const {
}
void HexagonInstPrinter::printSymbol(const MCInst *MI, unsigned OpNo,
raw_ostream &O, bool hi) const {
const MCOperand& MO = MI->getOperand(OpNo);
O << '#' << (hi? "HI": "LO") << '(';
if (MO.isImm()) {
O << '#';
printOperand(MI, OpNo, O);
} else {
assert("Unknown symbol operand");
printOperand(MI, OpNo, O);
}
O << ')';
}
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