diff options
Diffstat (limited to 'contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp')
| -rw-r--r-- | contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp | 461 |
1 files changed, 461 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp b/contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp new file mode 100644 index 000000000000..1cbdafdf151d --- /dev/null +++ b/contrib/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp @@ -0,0 +1,461 @@ +//===-- 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" + +#define GET_REGINFO_MC_DESC +#include "X86GenRegisterInfo.inc" + +#define GET_INSTRINFO_MC_DESC +#include "X86GenInstrInfo.inc" + +#define GET_SUBTARGETINFO_MC_DESC +#include "X86GenSubtargetInfo.inc" + +#if _MSC_VER +#include <intrin.h> +#endif + +using namespace llvm; + + +std::string X86_MC::ParseX86Triple(StringRef TT) { + Triple TheTriple(TT); + std::string FS; + if (TheTriple.getArch() == Triple::x86_64) + FS = "+64bit-mode"; + else + FS = "-64bit-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(StringRef TT, bool isEH) { + Triple TheTriple(TT); + if (TheTriple.getArch() == Triple::x86_64) + return DWARFFlavour::X86_64; + + if (TheTriple.isOSDarwin()) + return isEH ? DWARFFlavour::X86_32_DarwinEH : DWARFFlavour::X86_32_Generic; + if (TheTriple.getOS() == Triple::MinGW32 || + TheTriple.getOS() == Triple::Cygwin) + // 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()) { +#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)\ + || defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64) + CPUName = sys::getHostCPUName(); +#else + CPUName = "generic"; +#endif + } + + 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(TT, false), + X86_MC::getDwarfRegFlavour(TT, 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.isOSDarwin() || TheTriple.getEnvironment() == Triple::MachO) { + if (is64Bit) + MAI = new X86_64MCAsmInfoDarwin(TheTriple); + else + MAI = new X86MCAsmInfoDarwin(TheTriple); + } else if (TheTriple.getEnvironment() == Triple::ELF) { + // Force the use of an ELF container. + MAI = new X86ELFMCAsmInfo(TheTriple); + } else if (TheTriple.getOS() == Triple::Win32) { + MAI = new X86MCAsmInfoMicrosoft(TheTriple); + } else if (TheTriple.getOS() == Triple::MinGW32 || TheTriple.getOS() == Triple::Cygwin) { + 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( + 0, 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( + 0, 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, + bool RelaxAll, + bool NoExecStack) { + Triple TheTriple(TT); + + if (TheTriple.isOSDarwin() || TheTriple.getEnvironment() == Triple::MachO) + return createMachOStreamer(Ctx, MAB, _OS, _Emitter, RelaxAll); + + if (TheTriple.isOSWindows() && TheTriple.getEnvironment() != Triple::ELF) + return createWinCOFFStreamer(Ctx, MAB, *_Emitter, _OS, RelaxAll); + + return createELFStreamer(Ctx, 0, MAB, _OS, _Emitter, RelaxAll, NoExecStack); +} + +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); + if (SyntaxVariant == 1) + return new X86IntelInstPrinter(MAI, MII, MRI); + return 0; +} + +static MCRelocationInfo *createX86MCRelocationInfo(StringRef TT, + MCContext &Ctx) { + Triple TheTriple(TT); + if (TheTriple.isEnvironmentMachO() && 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); +} |