1 //===- HexagonInstPrinter.cpp - Convert Hexagon MCInst to assembly syntax -===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This class prints an Hexagon MCInst to a .s file.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "asm-printer"
16 #include "HexagonAsmPrinter.h"
17 #include "HexagonInstPrinter.h"
18 #include "HexagonMCInst.h"
19 #include "llvm/MC/MCInst.h"
20 #include "llvm/MC/MCAsmInfo.h"
21 #include "llvm/MC/MCExpr.h"
22 #include "llvm/ADT/StringExtras.h"
23 #include "llvm/Support/raw_ostream.h"
28 #define GET_INSTRUCTION_NAME
29 #include "HexagonGenAsmWriter.inc"
31 StringRef HexagonInstPrinter::getOpcodeName(unsigned Opcode) const {
32 return MII.getName(Opcode);
35 StringRef HexagonInstPrinter::getRegName(unsigned RegNo) const {
36 return getRegisterName(RegNo);
39 void HexagonInstPrinter::printInst(const MCInst *MI, raw_ostream &O,
41 printInst((const HexagonMCInst*)(MI), O, Annot);
44 void HexagonInstPrinter::printInst(const HexagonMCInst *MI, raw_ostream &O,
46 const char packetPadding[] = " ";
47 const char startPacket = '{',
49 // TODO: add outer HW loop when it's supported too.
50 if (MI->getOpcode() == Hexagon::ENDLOOP0) {
51 // Ending a harware loop is different from ending an regular packet.
52 assert(MI->isEndPacket() && "Loop end must also end the packet");
54 if (MI->isStartPacket()) {
55 // There must be a packet to end a loop.
56 // FIXME: when shuffling is always run, this shouldn't be needed.
60 Nop.setOpcode (Hexagon::NOP);
61 Nop.setStartPacket (MI->isStartPacket());
62 printInst (&Nop, O, NoAnnot);
66 if (MI->isEndPacket())
67 O << packetPadding << endPacket;
69 printInstruction(MI, O);
72 // Prefix the insn opening the packet.
73 if (MI->isStartPacket())
74 O << packetPadding << startPacket << '\n';
76 printInstruction(MI, O);
78 // Suffix the insn closing the packet.
79 if (MI->isEndPacket())
80 // Suffix the packet in a new line always, since the GNU assembler has
81 // issues with a closing brace on the same line as CONST{32,64}.
82 O << '\n' << packetPadding << endPacket;
85 printAnnotation(O, Annot);
88 void HexagonInstPrinter::printOperand(const MCInst *MI, unsigned OpNo,
89 raw_ostream &O) const {
90 const MCOperand& MO = MI->getOperand(OpNo);
93 O << getRegisterName(MO.getReg());
94 } else if(MO.isExpr()) {
96 } else if(MO.isImm()) {
97 printImmOperand(MI, OpNo, O);
99 llvm_unreachable("Unknown operand");
103 void HexagonInstPrinter::printImmOperand(const MCInst *MI, unsigned OpNo,
104 raw_ostream &O) const {
105 O << MI->getOperand(OpNo).getImm();
108 void HexagonInstPrinter::printExtOperand(const MCInst *MI, unsigned OpNo,
109 raw_ostream &O) const {
110 O << MI->getOperand(OpNo).getImm();
113 void HexagonInstPrinter::printUnsignedImmOperand(const MCInst *MI,
114 unsigned OpNo, raw_ostream &O) const {
115 O << MI->getOperand(OpNo).getImm();
118 void HexagonInstPrinter::printNegImmOperand(const MCInst *MI, unsigned OpNo,
119 raw_ostream &O) const {
120 O << -MI->getOperand(OpNo).getImm();
123 void HexagonInstPrinter::printNOneImmOperand(const MCInst *MI, unsigned OpNo,
124 raw_ostream &O) const {
128 void HexagonInstPrinter::printMEMriOperand(const MCInst *MI, unsigned OpNo,
129 raw_ostream &O) const {
130 const MCOperand& MO0 = MI->getOperand(OpNo);
131 const MCOperand& MO1 = MI->getOperand(OpNo + 1);
133 O << getRegisterName(MO0.getReg());
134 O << " + #" << MO1.getImm();
137 void HexagonInstPrinter::printFrameIndexOperand(const MCInst *MI, unsigned OpNo,
138 raw_ostream &O) const {
139 const MCOperand& MO0 = MI->getOperand(OpNo);
140 const MCOperand& MO1 = MI->getOperand(OpNo + 1);
142 O << getRegisterName(MO0.getReg()) << ", #" << MO1.getImm();
145 void HexagonInstPrinter::printGlobalOperand(const MCInst *MI, unsigned OpNo,
146 raw_ostream &O) const {
147 assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
149 printOperand(MI, OpNo, O);
152 void HexagonInstPrinter::printJumpTable(const MCInst *MI, unsigned OpNo,
153 raw_ostream &O) const {
154 assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
156 printOperand(MI, OpNo, O);
159 void HexagonInstPrinter::printConstantPool(const MCInst *MI, unsigned OpNo,
160 raw_ostream &O) const {
161 assert(MI->getOperand(OpNo).isExpr() && "Expecting expression");
163 printOperand(MI, OpNo, O);
166 void HexagonInstPrinter::printBranchOperand(const MCInst *MI, unsigned OpNo,
167 raw_ostream &O) const {
168 // Branches can take an immediate operand. This is used by the branch
169 // selection pass to print $+8, an eight byte displacement from the PC.
170 assert("Unknown branch operand.");
173 void HexagonInstPrinter::printCallOperand(const MCInst *MI, unsigned OpNo,
174 raw_ostream &O) const {
177 void HexagonInstPrinter::printAbsAddrOperand(const MCInst *MI, unsigned OpNo,
178 raw_ostream &O) const {
181 void HexagonInstPrinter::printPredicateOperand(const MCInst *MI, unsigned OpNo,
182 raw_ostream &O) const {
185 void HexagonInstPrinter::printSymbol(const MCInst *MI, unsigned OpNo,
186 raw_ostream &O, bool hi) const {
187 const MCOperand& MO = MI->getOperand(OpNo);
189 O << '#' << (hi? "HI": "LO") << '(';
192 printOperand(MI, OpNo, O);
194 assert("Unknown symbol operand");
195 printOperand(MI, OpNo, O);