1 //===-- ARMMCTargetDesc.cpp - ARM 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 ARM specific target descriptions.
12 //===----------------------------------------------------------------------===//
14 #include "ARMBaseInfo.h"
15 #include "ARMMCAsmInfo.h"
16 #include "ARMMCTargetDesc.h"
17 #include "InstPrinter/ARMInstPrinter.h"
18 #include "llvm/ADT/Triple.h"
19 #include "llvm/MC/MCCodeGenInfo.h"
20 #include "llvm/MC/MCELFStreamer.h"
21 #include "llvm/MC/MCInstrAnalysis.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/Support/ErrorHandling.h"
27 #include "llvm/Support/TargetRegistry.h"
31 #define GET_REGINFO_MC_DESC
32 #include "ARMGenRegisterInfo.inc"
34 static bool getMCRDeprecationInfo(MCInst &MI, MCSubtargetInfo &STI,
36 if (STI.getFeatureBits() & llvm::ARM::HasV7Ops &&
37 (MI.getOperand(0).isImm() && MI.getOperand(0).getImm() == 15) &&
38 (MI.getOperand(1).isImm() && MI.getOperand(1).getImm() == 0) &&
39 // Checks for the deprecated CP15ISB encoding:
40 // mcr p15, #0, rX, c7, c5, #4
41 (MI.getOperand(3).isImm() && MI.getOperand(3).getImm() == 7)) {
42 if ((MI.getOperand(5).isImm() && MI.getOperand(5).getImm() == 4)) {
43 if (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 5) {
44 Info = "deprecated since v7, use 'isb'";
48 // Checks for the deprecated CP15DSB encoding:
49 // mcr p15, #0, rX, c7, c10, #4
50 if (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 10) {
51 Info = "deprecated since v7, use 'dsb'";
55 // Checks for the deprecated CP15DMB encoding:
56 // mcr p15, #0, rX, c7, c10, #5
57 if (MI.getOperand(4).isImm() && MI.getOperand(4).getImm() == 10 &&
58 (MI.getOperand(5).isImm() && MI.getOperand(5).getImm() == 5)) {
59 Info = "deprecated since v7, use 'dmb'";
66 static bool getITDeprecationInfo(MCInst &MI, MCSubtargetInfo &STI,
68 if (STI.getFeatureBits() & llvm::ARM::HasV8Ops &&
69 MI.getOperand(1).isImm() && MI.getOperand(1).getImm() != 8) {
70 Info = "applying IT instruction to more than one subsequent instruction is deprecated";
77 #define GET_INSTRINFO_MC_DESC
78 #include "ARMGenInstrInfo.inc"
80 #define GET_SUBTARGETINFO_MC_DESC
81 #include "ARMGenSubtargetInfo.inc"
84 std::string ARM_MC::ParseARMTriple(StringRef TT, StringRef CPU) {
87 bool isThumb = triple.getArch() == Triple::thumb ||
88 triple.getArch() == Triple::thumbeb;
90 bool NoCPU = CPU == "generic" || CPU.empty();
91 std::string ARMArchFeature;
92 switch (triple.getSubArch()) {
93 case Triple::ARMSubArch_v8:
95 // v8a: FeatureDB, FeatureFPARMv8, FeatureNEON, FeatureDSPThumb2,
96 // FeatureMP, FeatureHWDiv, FeatureHWDivARM, FeatureTrustZone,
97 // FeatureT2XtPk, FeatureCrypto, FeatureCRC
98 ARMArchFeature = "+v8,+db,+fp-armv8,+neon,+t2dsp,+mp,+hwdiv,+hwdiv-arm,"
99 "+trustzone,+t2xtpk,+crypto,+crc";
101 // Use CPU to figure out the exact features
102 ARMArchFeature = "+v8";
104 case Triple::ARMSubArch_v7m:
107 // v7m: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureMClass
108 ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+mclass";
110 // Use CPU to figure out the exact features.
111 ARMArchFeature = "+v7";
113 case Triple::ARMSubArch_v7em:
115 // v7em: FeatureNoARM, FeatureDB, FeatureHWDiv, FeatureDSPThumb2,
116 // FeatureT2XtPk, FeatureMClass
117 ARMArchFeature = "+v7,+noarm,+db,+hwdiv,+t2dsp,t2xtpk,+mclass";
119 // Use CPU to figure out the exact features.
120 ARMArchFeature = "+v7";
122 case Triple::ARMSubArch_v7s:
124 // v7s: FeatureNEON, FeatureDB, FeatureDSPThumb2, FeatureHasRAS
126 ARMArchFeature = "+v7,+swift,+neon,+db,+t2dsp,+ras";
128 // Use CPU to figure out the exact features.
129 ARMArchFeature = "+v7";
131 case Triple::ARMSubArch_v7:
132 // v7 CPUs have lots of different feature sets. If no CPU is specified,
133 // then assume v7a (e.g. cortex-a8) feature set. Otherwise, return
134 // the "minimum" feature set and use CPU string to figure out the exact
137 // v7a: FeatureNEON, FeatureDB, FeatureDSPThumb2, FeatureT2XtPk
138 ARMArchFeature = "+v7,+neon,+db,+t2dsp,+t2xtpk";
140 // Use CPU to figure out the exact features.
141 ARMArchFeature = "+v7";
143 case Triple::ARMSubArch_v6t2:
144 ARMArchFeature = "+v6t2";
146 case Triple::ARMSubArch_v6m:
149 // v6m: FeatureNoARM, FeatureMClass
150 ARMArchFeature = "+v6m,+noarm,+mclass";
152 ARMArchFeature = "+v6";
154 case Triple::ARMSubArch_v6:
155 ARMArchFeature = "+v6";
157 case Triple::ARMSubArch_v5te:
158 ARMArchFeature = "+v5te";
160 case Triple::ARMSubArch_v5:
161 ARMArchFeature = "+v5t";
163 case Triple::ARMSubArch_v4t:
164 ARMArchFeature = "+v4t";
166 case Triple::NoSubArch:
171 if (ARMArchFeature.empty())
172 ARMArchFeature = "+thumb-mode";
174 ARMArchFeature += ",+thumb-mode";
177 if (triple.isOSNaCl()) {
178 if (ARMArchFeature.empty())
179 ARMArchFeature = "+nacl-trap";
181 ARMArchFeature += ",+nacl-trap";
184 return ARMArchFeature;
187 MCSubtargetInfo *ARM_MC::createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
189 std::string ArchFS = ARM_MC::ParseARMTriple(TT, CPU);
192 ArchFS = ArchFS + "," + FS.str();
197 MCSubtargetInfo *X = new MCSubtargetInfo();
198 InitARMMCSubtargetInfo(X, TT, CPU, ArchFS);
202 static MCInstrInfo *createARMMCInstrInfo() {
203 MCInstrInfo *X = new MCInstrInfo();
204 InitARMMCInstrInfo(X);
208 static MCRegisterInfo *createARMMCRegisterInfo(StringRef Triple) {
209 MCRegisterInfo *X = new MCRegisterInfo();
210 InitARMMCRegisterInfo(X, ARM::LR, 0, 0, ARM::PC);
214 static MCAsmInfo *createARMMCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) {
215 Triple TheTriple(TT);
218 switch (TheTriple.getOS()) {
219 case llvm::Triple::Darwin:
220 case llvm::Triple::IOS:
221 case llvm::Triple::MacOSX:
222 MAI = new ARMMCAsmInfoDarwin(TT);
224 case llvm::Triple::Win32:
225 switch (TheTriple.getEnvironment()) {
226 case llvm::Triple::Itanium:
227 MAI = new ARMCOFFMCAsmInfoGNU();
229 case llvm::Triple::MSVC:
230 MAI = new ARMCOFFMCAsmInfoMicrosoft();
233 llvm_unreachable("invalid environment");
237 if (TheTriple.isOSBinFormatMachO())
238 MAI = new ARMMCAsmInfoDarwin(TT);
240 MAI = new ARMELFMCAsmInfo(TT);
244 unsigned Reg = MRI.getDwarfRegNum(ARM::SP, true);
245 MAI->addInitialFrameState(MCCFIInstruction::createDefCfa(nullptr, Reg, 0));
250 static MCCodeGenInfo *createARMMCCodeGenInfo(StringRef TT, Reloc::Model RM,
252 CodeGenOpt::Level OL) {
253 MCCodeGenInfo *X = new MCCodeGenInfo();
254 if (RM == Reloc::Default) {
255 Triple TheTriple(TT);
256 // Default relocation model on Darwin is PIC, not DynamicNoPIC.
257 RM = TheTriple.isOSDarwin() ? Reloc::PIC_ : Reloc::DynamicNoPIC;
259 X->InitMCCodeGenInfo(RM, CM, OL);
263 // This is duplicated code. Refactor this.
264 static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
265 MCContext &Ctx, MCAsmBackend &MAB,
267 MCCodeEmitter *Emitter,
268 const MCSubtargetInfo &STI,
271 Triple TheTriple(TT);
273 switch (TheTriple.getObjectFormat()) {
274 default: llvm_unreachable("unsupported object format");
275 case Triple::MachO: {
276 MCStreamer *S = createMachOStreamer(Ctx, MAB, OS, Emitter, false);
277 new ARMTargetStreamer(*S);
281 assert(TheTriple.isOSWindows() && "non-Windows ARM COFF is not supported");
282 return createARMWinCOFFStreamer(Ctx, MAB, *Emitter, OS);
284 return createARMELFStreamer(Ctx, MAB, OS, Emitter, false, NoExecStack,
285 TheTriple.getArch() == Triple::thumb);
289 static MCInstPrinter *createARMMCInstPrinter(const Target &T,
290 unsigned SyntaxVariant,
291 const MCAsmInfo &MAI,
292 const MCInstrInfo &MII,
293 const MCRegisterInfo &MRI,
294 const MCSubtargetInfo &STI) {
295 if (SyntaxVariant == 0)
296 return new ARMInstPrinter(MAI, MII, MRI, STI);
300 static MCRelocationInfo *createARMMCRelocationInfo(StringRef TT,
302 Triple TheTriple(TT);
303 if (TheTriple.isOSBinFormatMachO())
304 return createARMMachORelocationInfo(Ctx);
305 // Default to the stock relocation info.
306 return llvm::createMCRelocationInfo(TT, Ctx);
311 class ARMMCInstrAnalysis : public MCInstrAnalysis {
313 ARMMCInstrAnalysis(const MCInstrInfo *Info) : MCInstrAnalysis(Info) {}
315 bool isUnconditionalBranch(const MCInst &Inst) const override {
316 // BCCs with the "always" predicate are unconditional branches.
317 if (Inst.getOpcode() == ARM::Bcc && Inst.getOperand(1).getImm()==ARMCC::AL)
319 return MCInstrAnalysis::isUnconditionalBranch(Inst);
322 bool isConditionalBranch(const MCInst &Inst) const override {
323 // BCCs with the "always" predicate are unconditional branches.
324 if (Inst.getOpcode() == ARM::Bcc && Inst.getOperand(1).getImm()==ARMCC::AL)
326 return MCInstrAnalysis::isConditionalBranch(Inst);
329 bool evaluateBranch(const MCInst &Inst, uint64_t Addr,
330 uint64_t Size, uint64_t &Target) const override {
331 // We only handle PCRel branches for now.
332 if (Info->get(Inst.getOpcode()).OpInfo[0].OperandType!=MCOI::OPERAND_PCREL)
335 int64_t Imm = Inst.getOperand(0).getImm();
336 // FIXME: This is not right for thumb.
337 Target = Addr+Imm+8; // In ARM mode the PC is always off by 8 bytes.
344 static MCInstrAnalysis *createARMMCInstrAnalysis(const MCInstrInfo *Info) {
345 return new ARMMCInstrAnalysis(Info);
348 // Force static initialization.
349 extern "C" void LLVMInitializeARMTargetMC() {
350 // Register the MC asm info.
351 RegisterMCAsmInfoFn X(TheARMLETarget, createARMMCAsmInfo);
352 RegisterMCAsmInfoFn Y(TheARMBETarget, createARMMCAsmInfo);
353 RegisterMCAsmInfoFn A(TheThumbLETarget, createARMMCAsmInfo);
354 RegisterMCAsmInfoFn B(TheThumbBETarget, createARMMCAsmInfo);
356 // Register the MC codegen info.
357 TargetRegistry::RegisterMCCodeGenInfo(TheARMLETarget, createARMMCCodeGenInfo);
358 TargetRegistry::RegisterMCCodeGenInfo(TheARMBETarget, createARMMCCodeGenInfo);
359 TargetRegistry::RegisterMCCodeGenInfo(TheThumbLETarget,
360 createARMMCCodeGenInfo);
361 TargetRegistry::RegisterMCCodeGenInfo(TheThumbBETarget,
362 createARMMCCodeGenInfo);
364 // Register the MC instruction info.
365 TargetRegistry::RegisterMCInstrInfo(TheARMLETarget, createARMMCInstrInfo);
366 TargetRegistry::RegisterMCInstrInfo(TheARMBETarget, createARMMCInstrInfo);
367 TargetRegistry::RegisterMCInstrInfo(TheThumbLETarget, createARMMCInstrInfo);
368 TargetRegistry::RegisterMCInstrInfo(TheThumbBETarget, createARMMCInstrInfo);
370 // Register the MC register info.
371 TargetRegistry::RegisterMCRegInfo(TheARMLETarget, createARMMCRegisterInfo);
372 TargetRegistry::RegisterMCRegInfo(TheARMBETarget, createARMMCRegisterInfo);
373 TargetRegistry::RegisterMCRegInfo(TheThumbLETarget, createARMMCRegisterInfo);
374 TargetRegistry::RegisterMCRegInfo(TheThumbBETarget, createARMMCRegisterInfo);
376 // Register the MC subtarget info.
377 TargetRegistry::RegisterMCSubtargetInfo(TheARMLETarget,
378 ARM_MC::createARMMCSubtargetInfo);
379 TargetRegistry::RegisterMCSubtargetInfo(TheARMBETarget,
380 ARM_MC::createARMMCSubtargetInfo);
381 TargetRegistry::RegisterMCSubtargetInfo(TheThumbLETarget,
382 ARM_MC::createARMMCSubtargetInfo);
383 TargetRegistry::RegisterMCSubtargetInfo(TheThumbBETarget,
384 ARM_MC::createARMMCSubtargetInfo);
386 // Register the MC instruction analyzer.
387 TargetRegistry::RegisterMCInstrAnalysis(TheARMLETarget,
388 createARMMCInstrAnalysis);
389 TargetRegistry::RegisterMCInstrAnalysis(TheARMBETarget,
390 createARMMCInstrAnalysis);
391 TargetRegistry::RegisterMCInstrAnalysis(TheThumbLETarget,
392 createARMMCInstrAnalysis);
393 TargetRegistry::RegisterMCInstrAnalysis(TheThumbBETarget,
394 createARMMCInstrAnalysis);
396 // Register the MC Code Emitter
397 TargetRegistry::RegisterMCCodeEmitter(TheARMLETarget,
398 createARMLEMCCodeEmitter);
399 TargetRegistry::RegisterMCCodeEmitter(TheARMBETarget,
400 createARMBEMCCodeEmitter);
401 TargetRegistry::RegisterMCCodeEmitter(TheThumbLETarget,
402 createARMLEMCCodeEmitter);
403 TargetRegistry::RegisterMCCodeEmitter(TheThumbBETarget,
404 createARMBEMCCodeEmitter);
406 // Register the asm backend.
407 TargetRegistry::RegisterMCAsmBackend(TheARMLETarget, createARMLEAsmBackend);
408 TargetRegistry::RegisterMCAsmBackend(TheARMBETarget, createARMBEAsmBackend);
409 TargetRegistry::RegisterMCAsmBackend(TheThumbLETarget,
410 createThumbLEAsmBackend);
411 TargetRegistry::RegisterMCAsmBackend(TheThumbBETarget,
412 createThumbBEAsmBackend);
414 // Register the object streamer.
415 TargetRegistry::RegisterMCObjectStreamer(TheARMLETarget, createMCStreamer);
416 TargetRegistry::RegisterMCObjectStreamer(TheARMBETarget, createMCStreamer);
417 TargetRegistry::RegisterMCObjectStreamer(TheThumbLETarget, createMCStreamer);
418 TargetRegistry::RegisterMCObjectStreamer(TheThumbBETarget, createMCStreamer);
420 // Register the asm streamer.
421 TargetRegistry::RegisterAsmStreamer(TheARMLETarget, createMCAsmStreamer);
422 TargetRegistry::RegisterAsmStreamer(TheARMBETarget, createMCAsmStreamer);
423 TargetRegistry::RegisterAsmStreamer(TheThumbLETarget, createMCAsmStreamer);
424 TargetRegistry::RegisterAsmStreamer(TheThumbBETarget, createMCAsmStreamer);
426 // Register the null streamer.
427 TargetRegistry::RegisterNullStreamer(TheARMLETarget, createARMNullStreamer);
428 TargetRegistry::RegisterNullStreamer(TheARMBETarget, createARMNullStreamer);
429 TargetRegistry::RegisterNullStreamer(TheThumbLETarget, createARMNullStreamer);
430 TargetRegistry::RegisterNullStreamer(TheThumbBETarget, createARMNullStreamer);
432 // Register the MCInstPrinter.
433 TargetRegistry::RegisterMCInstPrinter(TheARMLETarget, createARMMCInstPrinter);
434 TargetRegistry::RegisterMCInstPrinter(TheARMBETarget, createARMMCInstPrinter);
435 TargetRegistry::RegisterMCInstPrinter(TheThumbLETarget,
436 createARMMCInstPrinter);
437 TargetRegistry::RegisterMCInstPrinter(TheThumbBETarget,
438 createARMMCInstPrinter);
440 // Register the MC relocation info.
441 TargetRegistry::RegisterMCRelocationInfo(TheARMLETarget,
442 createARMMCRelocationInfo);
443 TargetRegistry::RegisterMCRelocationInfo(TheARMBETarget,
444 createARMMCRelocationInfo);
445 TargetRegistry::RegisterMCRelocationInfo(TheThumbLETarget,
446 createARMMCRelocationInfo);
447 TargetRegistry::RegisterMCRelocationInfo(TheThumbBETarget,
448 createARMMCRelocationInfo);