1 //===-- X86MCTargetDesc.cpp - X86 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 X86 specific target descriptions.
12 //===----------------------------------------------------------------------===//
14 #include "X86MCTargetDesc.h"
15 #include "X86MCAsmInfo.h"
16 #include "InstPrinter/X86ATTInstPrinter.h"
17 #include "InstPrinter/X86IntelInstPrinter.h"
18 #include "llvm/MC/MachineLocation.h"
19 #include "llvm/MC/MCCodeGenInfo.h"
20 #include "llvm/MC/MCInstrAnalysis.h"
21 #include "llvm/MC/MCInstrInfo.h"
22 #include "llvm/MC/MCRegisterInfo.h"
23 #include "llvm/MC/MCStreamer.h"
24 #include "llvm/MC/MCSubtargetInfo.h"
25 #include "llvm/ADT/Triple.h"
26 #include "llvm/Support/Host.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/TargetRegistry.h"
30 #define GET_REGINFO_MC_DESC
31 #include "X86GenRegisterInfo.inc"
33 #define GET_INSTRINFO_MC_DESC
34 #include "X86GenInstrInfo.inc"
36 #define GET_SUBTARGETINFO_MC_DESC
37 #include "X86GenSubtargetInfo.inc"
46 std::string X86_MC::ParseX86Triple(StringRef TT) {
49 if (TheTriple.getArch() == Triple::x86_64)
56 /// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in the
57 /// specified arguments. If we can't run cpuid on the host, return true.
58 bool X86_MC::GetCpuIDAndInfo(unsigned value, unsigned *rEAX,
59 unsigned *rEBX, unsigned *rECX, unsigned *rEDX) {
60 #if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
62 // gcc doesn't know cpuid would clobber ebx/rbx. Preseve it manually.
63 asm ("movq\t%%rbx, %%rsi\n\t"
65 "xchgq\t%%rbx, %%rsi\n\t"
72 #elif defined(_MSC_VER)
74 __cpuid(registers, value);
83 #elif defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
85 asm ("movl\t%%ebx, %%esi\n\t"
87 "xchgl\t%%ebx, %%esi\n\t"
94 #elif defined(_MSC_VER)
99 mov dword ptr [esi],eax
101 mov dword ptr [esi],ebx
103 mov dword ptr [esi],ecx
105 mov dword ptr [esi],edx
116 /// GetCpuIDAndInfoEx - Execute the specified cpuid with subleaf and return the
117 /// 4 values in the specified arguments. If we can't run cpuid on the host,
119 bool X86_MC::GetCpuIDAndInfoEx(unsigned value, unsigned subleaf, unsigned *rEAX,
120 unsigned *rEBX, unsigned *rECX, unsigned *rEDX) {
121 #if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
122 #if defined(__GNUC__)
123 // gcc desn't know cpuid would clobber ebx/rbx. Preseve it manually.
124 asm ("movq\t%%rbx, %%rsi\n\t"
126 "xchgq\t%%rbx, %%rsi\n\t"
134 #elif defined(_MSC_VER)
135 // __cpuidex was added in MSVC++ 9.0 SP1
136 #if (_MSC_VER > 1500) || (_MSC_VER == 1500 && _MSC_FULL_VER >= 150030729)
138 __cpuidex(registers, value, subleaf);
139 *rEAX = registers[0];
140 *rEBX = registers[1];
141 *rECX = registers[2];
142 *rEDX = registers[3];
150 #elif defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
151 #if defined(__GNUC__)
152 asm ("movl\t%%ebx, %%esi\n\t"
154 "xchgl\t%%ebx, %%esi\n\t"
162 #elif defined(_MSC_VER)
168 mov dword ptr [esi],eax
170 mov dword ptr [esi],ebx
172 mov dword ptr [esi],ecx
174 mov dword ptr [esi],edx
185 void X86_MC::DetectFamilyModel(unsigned EAX, unsigned &Family,
187 Family = (EAX >> 8) & 0xf; // Bits 8 - 11
188 Model = (EAX >> 4) & 0xf; // Bits 4 - 7
189 if (Family == 6 || Family == 0xf) {
191 // Examine extended family ID if family ID is F.
192 Family += (EAX >> 20) & 0xff; // Bits 20 - 27
193 // Examine extended model ID if family ID is 6 or F.
194 Model += ((EAX >> 16) & 0xf) << 4; // Bits 16 - 19
198 unsigned X86_MC::getDwarfRegFlavour(StringRef TT, bool isEH) {
199 Triple TheTriple(TT);
200 if (TheTriple.getArch() == Triple::x86_64)
201 return DWARFFlavour::X86_64;
203 if (TheTriple.isOSDarwin())
204 return isEH ? DWARFFlavour::X86_32_DarwinEH : DWARFFlavour::X86_32_Generic;
205 if (TheTriple.getOS() == Triple::MinGW32 ||
206 TheTriple.getOS() == Triple::Cygwin)
207 // Unsupported by now, just quick fallback
208 return DWARFFlavour::X86_32_Generic;
209 return DWARFFlavour::X86_32_Generic;
212 /// getX86RegNum - This function maps LLVM register identifiers to their X86
213 /// specific numbering, which is used in various places encoding instructions.
214 unsigned X86_MC::getX86RegNum(unsigned RegNo) {
216 case X86::RAX: case X86::EAX: case X86::AX: case X86::AL: return N86::EAX;
217 case X86::RCX: case X86::ECX: case X86::CX: case X86::CL: return N86::ECX;
218 case X86::RDX: case X86::EDX: case X86::DX: case X86::DL: return N86::EDX;
219 case X86::RBX: case X86::EBX: case X86::BX: case X86::BL: return N86::EBX;
220 case X86::RSP: case X86::ESP: case X86::SP: case X86::SPL: case X86::AH:
222 case X86::RBP: case X86::EBP: case X86::BP: case X86::BPL: case X86::CH:
224 case X86::RSI: case X86::ESI: case X86::SI: case X86::SIL: case X86::DH:
226 case X86::RDI: case X86::EDI: case X86::DI: case X86::DIL: case X86::BH:
229 case X86::R8: case X86::R8D: case X86::R8W: case X86::R8B:
231 case X86::R9: case X86::R9D: case X86::R9W: case X86::R9B:
233 case X86::R10: case X86::R10D: case X86::R10W: case X86::R10B:
235 case X86::R11: case X86::R11D: case X86::R11W: case X86::R11B:
237 case X86::R12: case X86::R12D: case X86::R12W: case X86::R12B:
239 case X86::R13: case X86::R13D: case X86::R13W: case X86::R13B:
241 case X86::R14: case X86::R14D: case X86::R14W: case X86::R14B:
243 case X86::R15: case X86::R15D: case X86::R15W: case X86::R15B:
246 case X86::ST0: case X86::ST1: case X86::ST2: case X86::ST3:
247 case X86::ST4: case X86::ST5: case X86::ST6: case X86::ST7:
248 return RegNo-X86::ST0;
250 case X86::XMM0: case X86::XMM8:
251 case X86::YMM0: case X86::YMM8: case X86::MM0:
253 case X86::XMM1: case X86::XMM9:
254 case X86::YMM1: case X86::YMM9: case X86::MM1:
256 case X86::XMM2: case X86::XMM10:
257 case X86::YMM2: case X86::YMM10: case X86::MM2:
259 case X86::XMM3: case X86::XMM11:
260 case X86::YMM3: case X86::YMM11: case X86::MM3:
262 case X86::XMM4: case X86::XMM12:
263 case X86::YMM4: case X86::YMM12: case X86::MM4:
265 case X86::XMM5: case X86::XMM13:
266 case X86::YMM5: case X86::YMM13: case X86::MM5:
268 case X86::XMM6: case X86::XMM14:
269 case X86::YMM6: case X86::YMM14: case X86::MM6:
271 case X86::XMM7: case X86::XMM15:
272 case X86::YMM7: case X86::YMM15: case X86::MM7:
275 case X86::ES: return 0;
276 case X86::CS: return 1;
277 case X86::SS: return 2;
278 case X86::DS: return 3;
279 case X86::FS: return 4;
280 case X86::GS: return 5;
282 case X86::CR0: case X86::CR8 : case X86::DR0: return 0;
283 case X86::CR1: case X86::CR9 : case X86::DR1: return 1;
284 case X86::CR2: case X86::CR10: case X86::DR2: return 2;
285 case X86::CR3: case X86::CR11: case X86::DR3: return 3;
286 case X86::CR4: case X86::CR12: case X86::DR4: return 4;
287 case X86::CR5: case X86::CR13: case X86::DR5: return 5;
288 case X86::CR6: case X86::CR14: case X86::DR6: return 6;
289 case X86::CR7: case X86::CR15: case X86::DR7: return 7;
291 // Pseudo index registers are equivalent to a "none"
292 // scaled index (See Intel Manual 2A, table 2-3)
298 assert((int(RegNo) > 0) && "Unknown physical register!");
303 void X86_MC::InitLLVM2SEHRegisterMapping(MCRegisterInfo *MRI) {
304 // FIXME: TableGen these.
305 for (unsigned Reg = X86::NoRegister+1; Reg < X86::NUM_TARGET_REGS; ++Reg) {
306 int SEH = X86_MC::getX86RegNum(Reg);
308 case X86::R8: case X86::R8D: case X86::R8W: case X86::R8B:
309 case X86::R9: case X86::R9D: case X86::R9W: case X86::R9B:
310 case X86::R10: case X86::R10D: case X86::R10W: case X86::R10B:
311 case X86::R11: case X86::R11D: case X86::R11W: case X86::R11B:
312 case X86::R12: case X86::R12D: case X86::R12W: case X86::R12B:
313 case X86::R13: case X86::R13D: case X86::R13W: case X86::R13B:
314 case X86::R14: case X86::R14D: case X86::R14W: case X86::R14B:
315 case X86::R15: case X86::R15D: case X86::R15W: case X86::R15B:
316 case X86::XMM8: case X86::XMM9: case X86::XMM10: case X86::XMM11:
317 case X86::XMM12: case X86::XMM13: case X86::XMM14: case X86::XMM15:
318 case X86::YMM8: case X86::YMM9: case X86::YMM10: case X86::YMM11:
319 case X86::YMM12: case X86::YMM13: case X86::YMM14: case X86::YMM15:
323 MRI->mapLLVMRegToSEHReg(Reg, SEH);
327 MCSubtargetInfo *X86_MC::createX86MCSubtargetInfo(StringRef TT, StringRef CPU,
329 std::string ArchFS = X86_MC::ParseX86Triple(TT);
332 ArchFS = ArchFS + "," + FS.str();
337 std::string CPUName = CPU;
338 if (CPUName.empty()) {
339 #if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)\
340 || defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
341 CPUName = sys::getHostCPUName();
347 MCSubtargetInfo *X = new MCSubtargetInfo();
348 InitX86MCSubtargetInfo(X, TT, CPUName, ArchFS);
352 static MCInstrInfo *createX86MCInstrInfo() {
353 MCInstrInfo *X = new MCInstrInfo();
354 InitX86MCInstrInfo(X);
358 static MCRegisterInfo *createX86MCRegisterInfo(StringRef TT) {
359 Triple TheTriple(TT);
360 unsigned RA = (TheTriple.getArch() == Triple::x86_64)
361 ? X86::RIP // Should have dwarf #16.
362 : X86::EIP; // Should have dwarf #8.
364 MCRegisterInfo *X = new MCRegisterInfo();
365 InitX86MCRegisterInfo(X, RA,
366 X86_MC::getDwarfRegFlavour(TT, false),
367 X86_MC::getDwarfRegFlavour(TT, true));
368 X86_MC::InitLLVM2SEHRegisterMapping(X);
372 static MCAsmInfo *createX86MCAsmInfo(const Target &T, StringRef TT) {
373 Triple TheTriple(TT);
374 bool is64Bit = TheTriple.getArch() == Triple::x86_64;
377 if (TheTriple.isOSDarwin() || TheTriple.getEnvironment() == Triple::MachO) {
379 MAI = new X86_64MCAsmInfoDarwin(TheTriple);
381 MAI = new X86MCAsmInfoDarwin(TheTriple);
382 } else if (TheTriple.getOS() == Triple::Win32) {
383 MAI = new X86MCAsmInfoMicrosoft(TheTriple);
384 } else if (TheTriple.getOS() == Triple::MinGW32 || TheTriple.getOS() == Triple::Cygwin) {
385 MAI = new X86MCAsmInfoGNUCOFF(TheTriple);
387 MAI = new X86ELFMCAsmInfo(TheTriple);
390 // Initialize initial frame state.
391 // Calculate amount of bytes used for return address storing
392 int stackGrowth = is64Bit ? -8 : -4;
394 // Initial state of the frame pointer is esp+stackGrowth.
395 MachineLocation Dst(MachineLocation::VirtualFP);
396 MachineLocation Src(is64Bit ? X86::RSP : X86::ESP, stackGrowth);
397 MAI->addInitialFrameState(0, Dst, Src);
399 // Add return address to move list
400 MachineLocation CSDst(is64Bit ? X86::RSP : X86::ESP, stackGrowth);
401 MachineLocation CSSrc(is64Bit ? X86::RIP : X86::EIP);
402 MAI->addInitialFrameState(0, CSDst, CSSrc);
407 static MCCodeGenInfo *createX86MCCodeGenInfo(StringRef TT, Reloc::Model RM,
409 CodeGenOpt::Level OL) {
410 MCCodeGenInfo *X = new MCCodeGenInfo();
413 bool is64Bit = T.getArch() == Triple::x86_64;
415 if (RM == Reloc::Default) {
416 // Darwin defaults to PIC in 64 bit mode and dynamic-no-pic in 32 bit mode.
417 // Win64 requires rip-rel addressing, thus we force it to PIC. Otherwise we
418 // use static relocation model by default.
419 if (T.isOSDarwin()) {
423 RM = Reloc::DynamicNoPIC;
424 } else if (T.isOSWindows() && is64Bit)
430 // ELF and X86-64 don't have a distinct DynamicNoPIC model. DynamicNoPIC
431 // is defined as a model for code which may be used in static or dynamic
432 // executables but not necessarily a shared library. On X86-32 we just
433 // compile in -static mode, in x86-64 we use PIC.
434 if (RM == Reloc::DynamicNoPIC) {
437 else if (!T.isOSDarwin())
441 // If we are on Darwin, disallow static relocation model in X86-64 mode, since
442 // the Mach-O file format doesn't support it.
443 if (RM == Reloc::Static && T.isOSDarwin() && is64Bit)
446 // For static codegen, if we're not already set, use Small codegen.
447 if (CM == CodeModel::Default)
448 CM = CodeModel::Small;
449 else if (CM == CodeModel::JITDefault)
450 // 64-bit JIT places everything in the same buffer except external funcs.
451 CM = is64Bit ? CodeModel::Large : CodeModel::Small;
453 X->InitMCCodeGenInfo(RM, CM, OL);
457 static MCStreamer *createMCStreamer(const Target &T, StringRef TT,
458 MCContext &Ctx, MCAsmBackend &MAB,
460 MCCodeEmitter *_Emitter,
463 Triple TheTriple(TT);
465 if (TheTriple.isOSDarwin() || TheTriple.getEnvironment() == Triple::MachO)
466 return createMachOStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll);
468 if (TheTriple.isOSWindows())
469 return createWinCOFFStreamer(Ctx, MAB, *_Emitter, _OS, RelaxAll);
471 return createELFStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll, NoExecStack);
474 static MCInstPrinter *createX86MCInstPrinter(const Target &T,
475 unsigned SyntaxVariant,
476 const MCAsmInfo &MAI,
477 const MCSubtargetInfo &STI) {
478 if (SyntaxVariant == 0)
479 return new X86ATTInstPrinter(MAI);
480 if (SyntaxVariant == 1)
481 return new X86IntelInstPrinter(MAI);
485 static MCInstrAnalysis *createX86MCInstrAnalysis(const MCInstrInfo *Info) {
486 return new MCInstrAnalysis(Info);
489 // Force static initialization.
490 extern "C" void LLVMInitializeX86TargetMC() {
491 // Register the MC asm info.
492 RegisterMCAsmInfoFn A(TheX86_32Target, createX86MCAsmInfo);
493 RegisterMCAsmInfoFn B(TheX86_64Target, createX86MCAsmInfo);
495 // Register the MC codegen info.
496 RegisterMCCodeGenInfoFn C(TheX86_32Target, createX86MCCodeGenInfo);
497 RegisterMCCodeGenInfoFn D(TheX86_64Target, createX86MCCodeGenInfo);
499 // Register the MC instruction info.
500 TargetRegistry::RegisterMCInstrInfo(TheX86_32Target, createX86MCInstrInfo);
501 TargetRegistry::RegisterMCInstrInfo(TheX86_64Target, createX86MCInstrInfo);
503 // Register the MC register info.
504 TargetRegistry::RegisterMCRegInfo(TheX86_32Target, createX86MCRegisterInfo);
505 TargetRegistry::RegisterMCRegInfo(TheX86_64Target, createX86MCRegisterInfo);
507 // Register the MC subtarget info.
508 TargetRegistry::RegisterMCSubtargetInfo(TheX86_32Target,
509 X86_MC::createX86MCSubtargetInfo);
510 TargetRegistry::RegisterMCSubtargetInfo(TheX86_64Target,
511 X86_MC::createX86MCSubtargetInfo);
513 // Register the MC instruction analyzer.
514 TargetRegistry::RegisterMCInstrAnalysis(TheX86_32Target,
515 createX86MCInstrAnalysis);
516 TargetRegistry::RegisterMCInstrAnalysis(TheX86_64Target,
517 createX86MCInstrAnalysis);
519 // Register the code emitter.
520 TargetRegistry::RegisterMCCodeEmitter(TheX86_32Target,
521 createX86MCCodeEmitter);
522 TargetRegistry::RegisterMCCodeEmitter(TheX86_64Target,
523 createX86MCCodeEmitter);
525 // Register the asm backend.
526 TargetRegistry::RegisterMCAsmBackend(TheX86_32Target,
527 createX86_32AsmBackend);
528 TargetRegistry::RegisterMCAsmBackend(TheX86_64Target,
529 createX86_64AsmBackend);
531 // Register the object streamer.
532 TargetRegistry::RegisterMCObjectStreamer(TheX86_32Target,
534 TargetRegistry::RegisterMCObjectStreamer(TheX86_64Target,
537 // Register the MCInstPrinter.
538 TargetRegistry::RegisterMCInstPrinter(TheX86_32Target,
539 createX86MCInstPrinter);
540 TargetRegistry::RegisterMCInstPrinter(TheX86_64Target,
541 createX86MCInstPrinter);