| //===-- X86MCTargetDesc.cpp - X86 Target Descriptions ---------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file provides X86 specific target descriptions. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "X86MCTargetDesc.h" |
| #include "InstPrinter/X86ATTInstPrinter.h" |
| #include "InstPrinter/X86IntelInstPrinter.h" |
| #include "X86MCAsmInfo.h" |
| #include "llvm/ADT/Triple.h" |
| #include "llvm/MC/MCCodeGenInfo.h" |
| #include "llvm/MC/MCInstrAnalysis.h" |
| #include "llvm/MC/MCInstrInfo.h" |
| #include "llvm/MC/MCRegisterInfo.h" |
| #include "llvm/MC/MCStreamer.h" |
| #include "llvm/MC/MCSubtargetInfo.h" |
| #include "llvm/MC/MachineLocation.h" |
| #include "llvm/Support/ErrorHandling.h" |
| #include "llvm/Support/Host.h" |
| #include "llvm/Support/TargetRegistry.h" |
| |
| #if _MSC_VER |
| #include <intrin.h> |
| #endif |
| |
| using namespace llvm; |
| |
| #define GET_REGINFO_MC_DESC |
| #include "X86GenRegisterInfo.inc" |
| |
| #define GET_INSTRINFO_MC_DESC |
| #include "X86GenInstrInfo.inc" |
| |
| #define GET_SUBTARGETINFO_MC_DESC |
| #include "X86GenSubtargetInfo.inc" |
| |
| std::string X86_MC::ParseX86Triple(StringRef TT) { |
| Triple TheTriple(TT); |
| std::string FS; |
| if (TheTriple.getArch() == Triple::x86_64) |
| FS = "+64bit-mode,-32bit-mode,-16bit-mode"; |
| else if (TheTriple.getEnvironment() != Triple::CODE16) |
| FS = "-64bit-mode,+32bit-mode,-16bit-mode"; |
| else |
| FS = "-64bit-mode,-32bit-mode,+16bit-mode"; |
| |
| return FS; |
| } |
| |
| /// GetCpuIDAndInfo - Execute the specified cpuid and return the 4 values in the |
| /// specified arguments. If we can't run cpuid on the host, return true. |
| bool X86_MC::GetCpuIDAndInfo(unsigned value, unsigned *rEAX, |
| unsigned *rEBX, unsigned *rECX, unsigned *rEDX) { |
| #if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64) |
| #if defined(__GNUC__) |
| // gcc doesn't know cpuid would clobber ebx/rbx. Preseve it manually. |
| asm ("movq\t%%rbx, %%rsi\n\t" |
| "cpuid\n\t" |
| "xchgq\t%%rbx, %%rsi\n\t" |
| : "=a" (*rEAX), |
| "=S" (*rEBX), |
| "=c" (*rECX), |
| "=d" (*rEDX) |
| : "a" (value)); |
| return false; |
| #elif defined(_MSC_VER) |
| int registers[4]; |
| __cpuid(registers, value); |
| *rEAX = registers[0]; |
| *rEBX = registers[1]; |
| *rECX = registers[2]; |
| *rEDX = registers[3]; |
| return false; |
| #else |
| return true; |
| #endif |
| #elif defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86) |
| #if defined(__GNUC__) |
| asm ("movl\t%%ebx, %%esi\n\t" |
| "cpuid\n\t" |
| "xchgl\t%%ebx, %%esi\n\t" |
| : "=a" (*rEAX), |
| "=S" (*rEBX), |
| "=c" (*rECX), |
| "=d" (*rEDX) |
| : "a" (value)); |
| return false; |
| #elif defined(_MSC_VER) |
| __asm { |
| mov eax,value |
| cpuid |
| mov esi,rEAX |
| mov dword ptr [esi],eax |
| mov esi,rEBX |
| mov dword ptr [esi],ebx |
| mov esi,rECX |
| mov dword ptr [esi],ecx |
| mov esi,rEDX |
| mov dword ptr [esi],edx |
| } |
| return false; |
| #else |
| return true; |
| #endif |
| #else |
| return true; |
| #endif |
| } |
| |
| /// GetCpuIDAndInfoEx - Execute the specified cpuid with subleaf and return the |
| /// 4 values in the specified arguments. If we can't run cpuid on the host, |
| /// return true. |
| bool X86_MC::GetCpuIDAndInfoEx(unsigned value, unsigned subleaf, unsigned *rEAX, |
| unsigned *rEBX, unsigned *rECX, unsigned *rEDX) { |
| #if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64) |
| #if defined(__GNUC__) |
| // gcc desn't know cpuid would clobber ebx/rbx. Preseve it manually. |
| asm ("movq\t%%rbx, %%rsi\n\t" |
| "cpuid\n\t" |
| "xchgq\t%%rbx, %%rsi\n\t" |
| : "=a" (*rEAX), |
| "=S" (*rEBX), |
| "=c" (*rECX), |
| "=d" (*rEDX) |
| : "a" (value), |
| "c" (subleaf)); |
| return false; |
| #elif defined(_MSC_VER) |
| // __cpuidex was added in MSVC++ 9.0 SP1 |
| #if (_MSC_VER > 1500) || (_MSC_VER == 1500 && _MSC_FULL_VER >= 150030729) |
| int registers[4]; |
| __cpuidex(registers, value, subleaf); |
| *rEAX = registers[0]; |
| *rEBX = registers[1]; |
| *rECX = registers[2]; |
| *rEDX = registers[3]; |
| return false; |
| #else |
| return true; |
| #endif |
| #else |
| return true; |
| #endif |
| #elif defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86) |
| #if defined(__GNUC__) |
| asm ("movl\t%%ebx, %%esi\n\t" |
| "cpuid\n\t" |
| "xchgl\t%%ebx, %%esi\n\t" |
| : "=a" (*rEAX), |
| "=S" (*rEBX), |
| "=c" (*rECX), |
| "=d" (*rEDX) |
| : "a" (value), |
| "c" (subleaf)); |
| return false; |
| #elif defined(_MSC_VER) |
| __asm { |
| mov eax,value |
| mov ecx,subleaf |
| cpuid |
| mov esi,rEAX |
| mov dword ptr [esi],eax |
| mov esi,rEBX |
| mov dword ptr [esi],ebx |
| mov esi,rECX |
| mov dword ptr [esi],ecx |
| mov esi,rEDX |
| mov dword ptr [esi],edx |
| } |
| return false; |
| #else |
| return true; |
| #endif |
| #else |
| return true; |
| #endif |
| } |
| |
| void X86_MC::DetectFamilyModel(unsigned EAX, unsigned &Family, |
| unsigned &Model) { |
| Family = (EAX >> 8) & 0xf; // Bits 8 - 11 |
| Model = (EAX >> 4) & 0xf; // Bits 4 - 7 |
| if (Family == 6 || Family == 0xf) { |
| if (Family == 0xf) |
| // Examine extended family ID if family ID is F. |
| Family += (EAX >> 20) & 0xff; // Bits 20 - 27 |
| // Examine extended model ID if family ID is 6 or F. |
| Model += ((EAX >> 16) & 0xf) << 4; // Bits 16 - 19 |
| } |
| } |
| |
| unsigned X86_MC::getDwarfRegFlavour(Triple TT, bool isEH) { |
| if (TT.getArch() == Triple::x86_64) |
| return DWARFFlavour::X86_64; |
| |
| if (TT.isOSDarwin()) |
| return isEH ? DWARFFlavour::X86_32_DarwinEH : DWARFFlavour::X86_32_Generic; |
| if (TT.isOSCygMing()) |
| // Unsupported by now, just quick fallback |
| return DWARFFlavour::X86_32_Generic; |
| return DWARFFlavour::X86_32_Generic; |
| } |
| |
| void X86_MC::InitLLVM2SEHRegisterMapping(MCRegisterInfo *MRI) { |
| // FIXME: TableGen these. |
| for (unsigned Reg = X86::NoRegister+1; Reg < X86::NUM_TARGET_REGS; ++Reg) { |
| unsigned SEH = MRI->getEncodingValue(Reg); |
| MRI->mapLLVMRegToSEHReg(Reg, SEH); |
| } |
| } |
| |
| MCSubtargetInfo *X86_MC::createX86MCSubtargetInfo(StringRef TT, StringRef CPU, |
| StringRef FS) { |
| std::string ArchFS = X86_MC::ParseX86Triple(TT); |
| if (!FS.empty()) { |
| if (!ArchFS.empty()) |
| ArchFS = ArchFS + "," + FS.str(); |
| else |
| ArchFS = FS; |
| } |
| |
| std::string CPUName = CPU; |
| if (CPUName.empty()) |
| CPUName = "generic"; |
| |
| MCSubtargetInfo *X = new MCSubtargetInfo(); |
| InitX86MCSubtargetInfo(X, TT, CPUName, ArchFS); |
| return X; |
| } |
| |
| static MCInstrInfo *createX86MCInstrInfo() { |
| MCInstrInfo *X = new MCInstrInfo(); |
| InitX86MCInstrInfo(X); |
| return X; |
| } |
| |
| static MCRegisterInfo *createX86MCRegisterInfo(StringRef TT) { |
| Triple TheTriple(TT); |
| unsigned RA = (TheTriple.getArch() == Triple::x86_64) |
| ? X86::RIP // Should have dwarf #16. |
| : X86::EIP; // Should have dwarf #8. |
| |
| MCRegisterInfo *X = new MCRegisterInfo(); |
| InitX86MCRegisterInfo(X, RA, |
| X86_MC::getDwarfRegFlavour(TheTriple, false), |
| X86_MC::getDwarfRegFlavour(TheTriple, true), |
| RA); |
| X86_MC::InitLLVM2SEHRegisterMapping(X); |
| return X; |
| } |
| |
| static MCAsmInfo *createX86MCAsmInfo(const MCRegisterInfo &MRI, StringRef TT) { |
| Triple TheTriple(TT); |
| bool is64Bit = TheTriple.getArch() == Triple::x86_64; |
| |
| MCAsmInfo *MAI; |
| if (TheTriple.isOSBinFormatMachO()) { |
| if (is64Bit) |
| MAI = new X86_64MCAsmInfoDarwin(TheTriple); |
| else |
| MAI = new X86MCAsmInfoDarwin(TheTriple); |
| } else if (TheTriple.isOSBinFormatELF()) { |
| // Force the use of an ELF container. |
| MAI = new X86ELFMCAsmInfo(TheTriple); |
| } else if (TheTriple.isWindowsMSVCEnvironment()) { |
| MAI = new X86MCAsmInfoMicrosoft(TheTriple); |
| } else if (TheTriple.isOSCygMing() || |
| TheTriple.isWindowsItaniumEnvironment()) { |
| MAI = new X86MCAsmInfoGNUCOFF(TheTriple); |
| } else { |
| // The default is ELF. |
| MAI = new X86ELFMCAsmInfo(TheTriple); |
| } |
| |
| // Initialize initial frame state. |
| // Calculate amount of bytes used for return address storing |
| int stackGrowth = is64Bit ? -8 : -4; |
| |
| // Initial state of the frame pointer is esp+stackGrowth. |
| unsigned StackPtr = is64Bit ? X86::RSP : X86::ESP; |
| MCCFIInstruction Inst = MCCFIInstruction::createDefCfa( |
| nullptr, MRI.getDwarfRegNum(StackPtr, true), -stackGrowth); |
| MAI->addInitialFrameState(Inst); |
| |
| // Add return address to move list |
| unsigned InstPtr = is64Bit ? X86::RIP : X86::EIP; |
| MCCFIInstruction Inst2 = MCCFIInstruction::createOffset( |
| nullptr, MRI.getDwarfRegNum(InstPtr, true), stackGrowth); |
| MAI->addInitialFrameState(Inst2); |
| |
| return MAI; |
| } |
| |
| static MCCodeGenInfo *createX86MCCodeGenInfo(StringRef TT, Reloc::Model RM, |
| CodeModel::Model CM, |
| CodeGenOpt::Level OL) { |
| MCCodeGenInfo *X = new MCCodeGenInfo(); |
| |
| Triple T(TT); |
| bool is64Bit = T.getArch() == Triple::x86_64; |
| |
| if (RM == Reloc::Default) { |
| // Darwin defaults to PIC in 64 bit mode and dynamic-no-pic in 32 bit mode. |
| // Win64 requires rip-rel addressing, thus we force it to PIC. Otherwise we |
| // use static relocation model by default. |
| if (T.isOSDarwin()) { |
| if (is64Bit) |
| RM = Reloc::PIC_; |
| else |
| RM = Reloc::DynamicNoPIC; |
| } else if (T.isOSWindows() && is64Bit) |
| RM = Reloc::PIC_; |
| else |
| RM = Reloc::Static; |
| } |
| |
| // ELF and X86-64 don't have a distinct DynamicNoPIC model. DynamicNoPIC |
| // is defined as a model for code which may be used in static or dynamic |
| // executables but not necessarily a shared library. On X86-32 we just |
| // compile in -static mode, in x86-64 we use PIC. |
| if (RM == Reloc::DynamicNoPIC) { |
| if (is64Bit) |
| RM = Reloc::PIC_; |
| else if (!T.isOSDarwin()) |
| RM = Reloc::Static; |
| } |
| |
| // If we are on Darwin, disallow static relocation model in X86-64 mode, since |
| // the Mach-O file format doesn't support it. |
| if (RM == Reloc::Static && T.isOSDarwin() && is64Bit) |
| RM = Reloc::PIC_; |
| |
| // For static codegen, if we're not already set, use Small codegen. |
| if (CM == CodeModel::Default) |
| CM = CodeModel::Small; |
| else if (CM == CodeModel::JITDefault) |
| // 64-bit JIT places everything in the same buffer except external funcs. |
| CM = is64Bit ? CodeModel::Large : CodeModel::Small; |
| |
| X->InitMCCodeGenInfo(RM, CM, OL); |
| return X; |
| } |
| |
| static MCStreamer *createMCStreamer(const Target &T, StringRef TT, |
| MCContext &Ctx, MCAsmBackend &MAB, |
| raw_ostream &_OS, MCCodeEmitter *_Emitter, |
| const MCSubtargetInfo &STI, bool RelaxAll) { |
| Triple TheTriple(TT); |
| |
| switch (TheTriple.getObjectFormat()) { |
| default: llvm_unreachable("unsupported object format"); |
| case Triple::MachO: |
| return createMachOStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll); |
| case Triple::COFF: |
| assert(TheTriple.isOSWindows() && "only Windows COFF is supported"); |
| return createX86WinCOFFStreamer(Ctx, MAB, _Emitter, _OS, RelaxAll); |
| case Triple::ELF: |
| return createELFStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll); |
| } |
| } |
| |
| static MCInstPrinter *createX86MCInstPrinter(const Target &T, |
| unsigned SyntaxVariant, |
| const MCAsmInfo &MAI, |
| const MCInstrInfo &MII, |
| const MCRegisterInfo &MRI, |
| const MCSubtargetInfo &STI) { |
| if (SyntaxVariant == 0) |
| return new X86ATTInstPrinter(MAI, MII, MRI, STI); |
| if (SyntaxVariant == 1) |
| return new X86IntelInstPrinter(MAI, MII, MRI); |
| return nullptr; |
| } |
| |
| static MCRelocationInfo *createX86MCRelocationInfo(StringRef TT, |
| MCContext &Ctx) { |
| Triple TheTriple(TT); |
| if (TheTriple.isOSBinFormatMachO() && TheTriple.getArch() == Triple::x86_64) |
| return createX86_64MachORelocationInfo(Ctx); |
| else if (TheTriple.isOSBinFormatELF()) |
| return createX86_64ELFRelocationInfo(Ctx); |
| // Default to the stock relocation info. |
| return llvm::createMCRelocationInfo(TT, Ctx); |
| } |
| |
| static MCInstrAnalysis *createX86MCInstrAnalysis(const MCInstrInfo *Info) { |
| return new MCInstrAnalysis(Info); |
| } |
| |
| // Force static initialization. |
| extern "C" void LLVMInitializeX86TargetMC() { |
| // Register the MC asm info. |
| RegisterMCAsmInfoFn A(TheX86_32Target, createX86MCAsmInfo); |
| RegisterMCAsmInfoFn B(TheX86_64Target, createX86MCAsmInfo); |
| |
| // Register the MC codegen info. |
| RegisterMCCodeGenInfoFn C(TheX86_32Target, createX86MCCodeGenInfo); |
| RegisterMCCodeGenInfoFn D(TheX86_64Target, createX86MCCodeGenInfo); |
| |
| // Register the MC instruction info. |
| TargetRegistry::RegisterMCInstrInfo(TheX86_32Target, createX86MCInstrInfo); |
| TargetRegistry::RegisterMCInstrInfo(TheX86_64Target, createX86MCInstrInfo); |
| |
| // Register the MC register info. |
| TargetRegistry::RegisterMCRegInfo(TheX86_32Target, createX86MCRegisterInfo); |
| TargetRegistry::RegisterMCRegInfo(TheX86_64Target, createX86MCRegisterInfo); |
| |
| // Register the MC subtarget info. |
| TargetRegistry::RegisterMCSubtargetInfo(TheX86_32Target, |
| X86_MC::createX86MCSubtargetInfo); |
| TargetRegistry::RegisterMCSubtargetInfo(TheX86_64Target, |
| X86_MC::createX86MCSubtargetInfo); |
| |
| // Register the MC instruction analyzer. |
| TargetRegistry::RegisterMCInstrAnalysis(TheX86_32Target, |
| createX86MCInstrAnalysis); |
| TargetRegistry::RegisterMCInstrAnalysis(TheX86_64Target, |
| createX86MCInstrAnalysis); |
| |
| // Register the code emitter. |
| TargetRegistry::RegisterMCCodeEmitter(TheX86_32Target, |
| createX86MCCodeEmitter); |
| TargetRegistry::RegisterMCCodeEmitter(TheX86_64Target, |
| createX86MCCodeEmitter); |
| |
| // Register the asm backend. |
| TargetRegistry::RegisterMCAsmBackend(TheX86_32Target, |
| createX86_32AsmBackend); |
| TargetRegistry::RegisterMCAsmBackend(TheX86_64Target, |
| createX86_64AsmBackend); |
| |
| // Register the object streamer. |
| TargetRegistry::RegisterMCObjectStreamer(TheX86_32Target, |
| createMCStreamer); |
| TargetRegistry::RegisterMCObjectStreamer(TheX86_64Target, |
| createMCStreamer); |
| |
| // Register the MCInstPrinter. |
| TargetRegistry::RegisterMCInstPrinter(TheX86_32Target, |
| createX86MCInstPrinter); |
| TargetRegistry::RegisterMCInstPrinter(TheX86_64Target, |
| createX86MCInstPrinter); |
| |
| // Register the MC relocation info. |
| TargetRegistry::RegisterMCRelocationInfo(TheX86_32Target, |
| createX86MCRelocationInfo); |
| TargetRegistry::RegisterMCRelocationInfo(TheX86_64Target, |
| createX86MCRelocationInfo); |
| } |
