1 //===-- BlackfinAsmPrinter.cpp - Blackfin LLVM assembly writer ------------===//
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 file contains a printer that converts from our internal representation
11 // of machine-dependent LLVM code to GAS-format BLACKFIN assembly language.
13 //===----------------------------------------------------------------------===//
15 #define DEBUG_TYPE "asm-printer"
17 #include "BlackfinInstrInfo.h"
18 #include "llvm/Constants.h"
19 #include "llvm/DerivedTypes.h"
20 #include "llvm/Module.h"
21 #include "llvm/CodeGen/AsmPrinter.h"
22 #include "llvm/CodeGen/DwarfWriter.h"
23 #include "llvm/CodeGen/MachineFunctionPass.h"
24 #include "llvm/CodeGen/MachineConstantPool.h"
25 #include "llvm/CodeGen/MachineInstr.h"
26 #include "llvm/MC/MCStreamer.h"
27 #include "llvm/MC/MCAsmInfo.h"
28 #include "llvm/MC/MCContext.h"
29 #include "llvm/MC/MCSymbol.h"
30 #include "llvm/Target/Mangler.h"
31 #include "llvm/Target/TargetData.h"
32 #include "llvm/Target/TargetLoweringObjectFile.h"
33 #include "llvm/Target/TargetRegistry.h"
34 #include "llvm/ADT/SmallString.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/FormattedStream.h"
40 class BlackfinAsmPrinter : public AsmPrinter {
42 BlackfinAsmPrinter(formatted_raw_ostream &O, TargetMachine &TM,
44 : AsmPrinter(O, TM, Streamer) {}
46 virtual const char *getPassName() const {
47 return "Blackfin Assembly Printer";
50 void printOperand(const MachineInstr *MI, int opNum);
51 void printMemoryOperand(const MachineInstr *MI, int opNum);
52 void printInstruction(const MachineInstr *MI); // autogenerated.
53 static const char *getRegisterName(unsigned RegNo);
55 void EmitInstruction(const MachineInstr *MI) {
57 OutStreamer.AddBlankLine();
59 bool PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
60 unsigned AsmVariant, const char *ExtraCode);
61 bool PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
62 unsigned AsmVariant, const char *ExtraCode);
64 } // end of anonymous namespace
66 #include "BlackfinGenAsmWriter.inc"
68 extern "C" void LLVMInitializeBlackfinAsmPrinter() {
69 RegisterAsmPrinter<BlackfinAsmPrinter> X(TheBlackfinTarget);
72 void BlackfinAsmPrinter::printOperand(const MachineInstr *MI, int opNum) {
73 const MachineOperand &MO = MI->getOperand (opNum);
74 switch (MO.getType()) {
75 case MachineOperand::MO_Register:
76 assert(TargetRegisterInfo::isPhysicalRegister(MO.getReg()) &&
77 "Virtual registers should be already mapped!");
78 O << getRegisterName(MO.getReg());
81 case MachineOperand::MO_Immediate:
84 case MachineOperand::MO_MachineBasicBlock:
85 O << *MO.getMBB()->getSymbol();
87 case MachineOperand::MO_GlobalAddress:
88 O << *Mang->getSymbol(MO.getGlobal());
89 printOffset(MO.getOffset());
91 case MachineOperand::MO_ExternalSymbol:
92 O << *GetExternalSymbolSymbol(MO.getSymbolName());
94 case MachineOperand::MO_ConstantPoolIndex:
95 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << "_"
98 case MachineOperand::MO_JumpTableIndex:
99 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
100 << '_' << MO.getIndex();
103 llvm_unreachable("<unknown operand type>");
108 void BlackfinAsmPrinter::printMemoryOperand(const MachineInstr *MI, int opNum) {
109 printOperand(MI, opNum);
111 if (MI->getOperand(opNum+1).isImm() && MI->getOperand(opNum+1).getImm() == 0)
115 printOperand(MI, opNum+1);
118 /// PrintAsmOperand - Print out an operand for an inline asm expression.
120 bool BlackfinAsmPrinter::PrintAsmOperand(const MachineInstr *MI,
123 const char *ExtraCode) {
124 if (ExtraCode && ExtraCode[0]) {
125 if (ExtraCode[1] != 0) return true; // Unknown modifier.
127 switch (ExtraCode[0]) {
128 default: return true; // Unknown modifier.
134 printOperand(MI, OpNo);
139 bool BlackfinAsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI,
142 const char *ExtraCode) {
143 if (ExtraCode && ExtraCode[0])
144 return true; // Unknown modifier
147 printOperand(MI, OpNo);