1 //===-- PPCMCTargetDesc.cpp - PowerPC Target Descriptions -----------------===//
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 provides PowerPC specific target descriptions.
12 //===----------------------------------------------------------------------===//
14 #include "PPCMCTargetDesc.h"
15 #include "InstPrinter/PPCInstPrinter.h"
16 #include "PPCMCAsmInfo.h"
17 #include "PPCTargetStreamer.h"
18 #include "llvm/MC/MCCodeGenInfo.h"
19 #include "llvm/MC/MCELF.h"
20 #include "llvm/MC/MCELFStreamer.h"
21 #include "llvm/MC/MCExpr.h"
22 #include "llvm/MC/MCInstrInfo.h"
23 #include "llvm/MC/MCRegisterInfo.h"
24 #include "llvm/MC/MCStreamer.h"
25 #include "llvm/MC/MCSubtargetInfo.h"
26 #include "llvm/MC/MCSymbol.h"
27 #include "llvm/MC/MachineLocation.h"
28 #include "llvm/Support/ELF.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/FormattedStream.h"
31 #include "llvm/Support/TargetRegistry.h"
35 #define GET_INSTRINFO_MC_DESC
36 #include "PPCGenInstrInfo.inc"
38 #define GET_SUBTARGETINFO_MC_DESC
39 #include "PPCGenSubtargetInfo.inc"
41 #define GET_REGINFO_MC_DESC
42 #include "PPCGenRegisterInfo.inc"
44 // Pin the vtable to this file.
45 PPCTargetStreamer::~PPCTargetStreamer() {}
46 PPCTargetStreamer::PPCTargetStreamer(MCStreamer &S) : MCTargetStreamer(S) {}
48 static MCInstrInfo *createPPCMCInstrInfo() {
49 MCInstrInfo *X = new MCInstrInfo();
50 InitPPCMCInstrInfo(X);
54 static MCRegisterInfo *createPPCMCRegisterInfo(StringRef TT) {
56 bool isPPC64 = (TheTriple.getArch() == Triple::ppc64 ||
57 TheTriple.getArch() == Triple::ppc64le);
58 unsigned Flavour = isPPC64 ? 0 : 1;
59 unsigned RA = isPPC64 ? PPC::LR8 : PPC::LR;
61 MCRegisterInfo *X = new MCRegisterInfo();
62 InitPPCMCRegisterInfo(X, RA, Flavour, Flavour);
66 static MCSubtargetInfo *createPPCMCSubtargetInfo(StringRef TT, StringRef CPU,
68 MCSubtargetInfo *X = new MCSubtargetInfo();
69 InitPPCMCSubtargetInfo(X, TT, CPU, FS);
73 static MCAsmInfo *createPPCMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
75 bool isPPC64 = (TheTriple.getArch() == Triple::ppc64 ||
76 TheTriple.getArch() == Triple::ppc64le);
79 if (TheTriple.isOSDarwin())
80 MAI = new PPCMCAsmInfoDarwin(isPPC64, TheTriple);
82 MAI = new PPCELFMCAsmInfo(isPPC64, TheTriple);
84 // Initial state of the frame pointer is R1.
85 unsigned Reg = isPPC64 ? PPC::X1 : PPC::R1;
86 MCCFIInstruction Inst =
87 MCCFIInstruction::createDefCfa(nullptr, MRI.getDwarfRegNum(Reg, true), 0);
88 MAI->addInitialFrameState(Inst);
93 static MCCodeGenInfo *createPPCMCCodeGenInfo(StringRef TT, Reloc::Model RM,
95 CodeGenOpt::Level OL) {
96 MCCodeGenInfo *X = new MCCodeGenInfo();
98 if (RM == Reloc::Default) {
101 RM = Reloc::DynamicNoPIC;
105 if (CM == CodeModel::Default) {
107 if (!T.isOSDarwin() &&
108 (T.getArch() == Triple::ppc64 || T.getArch() == Triple::ppc64le))
109 CM = CodeModel::Medium;
111 X->InitMCCodeGenInfo(RM, CM, OL);
116 class PPCTargetAsmStreamer : public PPCTargetStreamer {
117 formatted_raw_ostream &OS;
120 PPCTargetAsmStreamer(MCStreamer &S, formatted_raw_ostream &OS)
121 : PPCTargetStreamer(S), OS(OS) {}
122 void emitTCEntry(const MCSymbol &S) override {
129 void emitMachine(StringRef CPU) override {
130 OS << "\t.machine " << CPU << '\n';
132 void emitAbiVersion(int AbiVersion) override {
133 OS << "\t.abiversion " << AbiVersion << '\n';
135 void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) override {
136 OS << "\t.localentry\t" << *S << ", " << *LocalOffset << '\n';
140 class PPCTargetELFStreamer : public PPCTargetStreamer {
142 PPCTargetELFStreamer(MCStreamer &S) : PPCTargetStreamer(S) {}
143 MCELFStreamer &getStreamer() {
144 return static_cast<MCELFStreamer &>(Streamer);
146 void emitTCEntry(const MCSymbol &S) override {
147 // Creates a R_PPC64_TOC relocation
148 Streamer.EmitValueToAlignment(8);
149 Streamer.EmitSymbolValue(&S, 8);
151 void emitMachine(StringRef CPU) override {
152 // FIXME: Is there anything to do in here or does this directive only
155 void emitAbiVersion(int AbiVersion) override {
156 MCAssembler &MCA = getStreamer().getAssembler();
157 unsigned Flags = MCA.getELFHeaderEFlags();
158 Flags &= ~ELF::EF_PPC64_ABI;
159 Flags |= (AbiVersion & ELF::EF_PPC64_ABI);
160 MCA.setELFHeaderEFlags(Flags);
162 void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) override {
163 MCAssembler &MCA = getStreamer().getAssembler();
164 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(S);
167 if (!LocalOffset->EvaluateAsAbsolute(Res, MCA))
168 report_fatal_error(".localentry expression must be absolute.");
170 unsigned Encoded = ELF::encodePPC64LocalEntryOffset(Res);
171 if (Res != ELF::decodePPC64LocalEntryOffset(Encoded))
172 report_fatal_error(".localentry expression cannot be encoded.");
174 // The "other" values are stored in the last 6 bits of the second byte.
175 // The traditional defines for STO values assume the full byte and thus
176 // the shift to pack it.
177 unsigned Other = MCELF::getOther(Data) << 2;
178 Other &= ~ELF::STO_PPC64_LOCAL_MASK;
180 MCELF::setOther(Data, Other >> 2);
182 // For GAS compatibility, unless we already saw a .abiversion directive,
183 // set e_flags to indicate ELFv2 ABI.
184 unsigned Flags = MCA.getELFHeaderEFlags();
185 if ((Flags & ELF::EF_PPC64_ABI) == 0)
186 MCA.setELFHeaderEFlags(Flags | 2);
188 void emitAssignment(MCSymbol *Symbol, const MCExpr *Value) override {
189 // When encoding an assignment to set symbol A to symbol B, also copy
190 // the st_other bits encoding the local entry point offset.
191 if (Value->getKind() != MCExpr::SymbolRef)
193 const MCSymbol &RhsSym =
194 static_cast<const MCSymbolRefExpr *>(Value)->getSymbol();
195 MCSymbolData &Data = getStreamer().getOrCreateSymbolData(&RhsSym);
196 MCSymbolData &SymbolData = getStreamer().getOrCreateSymbolData(Symbol);
197 // The "other" values are stored in the last 6 bits of the second byte.
198 // The traditional defines for STO values assume the full byte and thus
199 // the shift to pack it.
200 unsigned Other = MCELF::getOther(SymbolData) << 2;
201 Other &= ~ELF::STO_PPC64_LOCAL_MASK;
202 Other |= (MCELF::getOther(Data) << 2) & ELF::STO_PPC64_LOCAL_MASK;
203 MCELF::setOther(SymbolData, Other >> 2);
207 class PPCTargetMachOStreamer : public PPCTargetStreamer {
209 PPCTargetMachOStreamer(MCStreamer &S) : PPCTargetStreamer(S) {}
210 void emitTCEntry(const MCSymbol &S) override {
211 llvm_unreachable("Unknown pseudo-op: .tc");
213 void emitMachine(StringRef CPU) override {
214 // FIXME: We should update the CPUType, CPUSubType in the Object file if
215 // the new values are different from the defaults.
217 void emitAbiVersion(int AbiVersion) override {
218 llvm_unreachable("Unknown pseudo-op: .abiversion");
220 void emitLocalEntry(MCSymbol *S, const MCExpr *LocalOffset) override {
221 llvm_unreachable("Unknown pseudo-op: .localentry");
226 // This is duplicated code. Refactor this.
227 static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
228 MCContext &Ctx, MCAsmBackend &MAB,
229 raw_ostream &OS, MCCodeEmitter *Emitter,
230 const MCSubtargetInfo &STI, bool RelaxAll) {
231 if (Triple(TT).isOSDarwin()) {
232 MCStreamer *S = createMachOStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
233 new PPCTargetMachOStreamer(*S);
237 MCStreamer *S = createELFStreamer(Ctx, MAB, OS, Emitter, RelaxAll);
238 new PPCTargetELFStreamer(*S);
243 createMCAsmStreamer(MCContext &Ctx, formatted_raw_ostream &OS,
244 bool isVerboseAsm, bool useDwarfDirectory,
245 MCInstPrinter *InstPrint, MCCodeEmitter *CE,
246 MCAsmBackend *TAB, bool ShowInst) {
248 MCStreamer *S = llvm::createAsmStreamer(
249 Ctx, OS, isVerboseAsm, useDwarfDirectory, InstPrint, CE, TAB, ShowInst);
250 new PPCTargetAsmStreamer(*S, OS);
254 static MCInstPrinter *createPPCMCInstPrinter(const Target &T,
255 unsigned SyntaxVariant,
256 const MCAsmInfo &MAI,
257 const MCInstrInfo &MII,
258 const MCRegisterInfo &MRI,
259 const MCSubtargetInfo &STI) {
260 bool isDarwin = Triple(STI.getTargetTriple()).isOSDarwin();
261 return new PPCInstPrinter(MAI, MII, MRI, isDarwin);
264 extern "C" void LLVMInitializePowerPCTargetMC() {
265 // Register the MC asm info.
266 RegisterMCAsmInfoFn C(ThePPC32Target, createPPCMCAsmInfo);
267 RegisterMCAsmInfoFn D(ThePPC64Target, createPPCMCAsmInfo);
268 RegisterMCAsmInfoFn E(ThePPC64LETarget, createPPCMCAsmInfo);
270 // Register the MC codegen info.
271 TargetRegistry::RegisterMCCodeGenInfo(ThePPC32Target, createPPCMCCodeGenInfo);
272 TargetRegistry::RegisterMCCodeGenInfo(ThePPC64Target, createPPCMCCodeGenInfo);
273 TargetRegistry::RegisterMCCodeGenInfo(ThePPC64LETarget,
274 createPPCMCCodeGenInfo);
276 // Register the MC instruction info.
277 TargetRegistry::RegisterMCInstrInfo(ThePPC32Target, createPPCMCInstrInfo);
278 TargetRegistry::RegisterMCInstrInfo(ThePPC64Target, createPPCMCInstrInfo);
279 TargetRegistry::RegisterMCInstrInfo(ThePPC64LETarget,
280 createPPCMCInstrInfo);
282 // Register the MC register info.
283 TargetRegistry::RegisterMCRegInfo(ThePPC32Target, createPPCMCRegisterInfo);
284 TargetRegistry::RegisterMCRegInfo(ThePPC64Target, createPPCMCRegisterInfo);
285 TargetRegistry::RegisterMCRegInfo(ThePPC64LETarget, createPPCMCRegisterInfo);
287 // Register the MC subtarget info.
288 TargetRegistry::RegisterMCSubtargetInfo(ThePPC32Target,
289 createPPCMCSubtargetInfo);
290 TargetRegistry::RegisterMCSubtargetInfo(ThePPC64Target,
291 createPPCMCSubtargetInfo);
292 TargetRegistry::RegisterMCSubtargetInfo(ThePPC64LETarget,
293 createPPCMCSubtargetInfo);
295 // Register the MC Code Emitter
296 TargetRegistry::RegisterMCCodeEmitter(ThePPC32Target, createPPCMCCodeEmitter);
297 TargetRegistry::RegisterMCCodeEmitter(ThePPC64Target, createPPCMCCodeEmitter);
298 TargetRegistry::RegisterMCCodeEmitter(ThePPC64LETarget,
299 createPPCMCCodeEmitter);
301 // Register the asm backend.
302 TargetRegistry::RegisterMCAsmBackend(ThePPC32Target, createPPCAsmBackend);
303 TargetRegistry::RegisterMCAsmBackend(ThePPC64Target, createPPCAsmBackend);
304 TargetRegistry::RegisterMCAsmBackend(ThePPC64LETarget, createPPCAsmBackend);
306 // Register the object streamer.
307 TargetRegistry::RegisterMCObjectStreamer(ThePPC32Target, createMCStreamer);
308 TargetRegistry::RegisterMCObjectStreamer(ThePPC64Target, createMCStreamer);
309 TargetRegistry::RegisterMCObjectStreamer(ThePPC64LETarget, createMCStreamer);
311 // Register the asm streamer.
312 TargetRegistry::RegisterAsmStreamer(ThePPC32Target, createMCAsmStreamer);
313 TargetRegistry::RegisterAsmStreamer(ThePPC64Target, createMCAsmStreamer);
314 TargetRegistry::RegisterAsmStreamer(ThePPC64LETarget, createMCAsmStreamer);
316 // Register the MCInstPrinter.
317 TargetRegistry::RegisterMCInstPrinter(ThePPC32Target, createPPCMCInstPrinter);
318 TargetRegistry::RegisterMCInstPrinter(ThePPC64Target, createPPCMCInstPrinter);
319 TargetRegistry::RegisterMCInstPrinter(ThePPC64LETarget,
320 createPPCMCInstPrinter);