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llvm-project/llvm/lib/Target/X86/MCTargetDesc/X86MCTargetDesc.cpp

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//===-- 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(const Triple &TT) {
std::string FS;
if (TT.getArch() == Triple::x86_64)
FS = "+64bit-mode,-32bit-mode,-16bit-mode";
else if (TT.getEnvironment() != Triple::CODE16)
FS = "-64bit-mode,+32bit-mode,-16bit-mode";
else
FS = "-64bit-mode,-32bit-mode,+16bit-mode";
return FS;
}
unsigned X86_MC::getDwarfRegFlavour(const 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::initLLVMToSEHAndCVRegMapping(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);
}
// These CodeView registers are numbered sequentially starting at value 1.
static const MCPhysReg LowCVRegs[] = {
X86::AL, X86::CL, X86::DL, X86::BL, X86::AH, X86::CH,
X86::DH, X86::BH, X86::AX, X86::CX, X86::DX, X86::BX,
X86::SP, X86::BP, X86::SI, X86::DI, X86::EAX, X86::ECX,
X86::EDX, X86::EBX, X86::ESP, X86::EBP, X86::ESI, X86::EDI,
};
unsigned CVLowRegStart = 1;
for (unsigned I = 0; I < array_lengthof(LowCVRegs); ++I)
MRI->mapLLVMRegToCVReg(LowCVRegs[I], I + CVLowRegStart);
// The x86 registers start at 128 and are numbered sequentially.
unsigned FP0Start = 128;
for (unsigned I = 0; I < 8; ++I)
MRI->mapLLVMRegToCVReg(X86::FP0 + I, FP0Start + I);
// The low 8 XMM registers start at 154 and are numbered sequentially.
unsigned CVXMM0Start = 154;
for (unsigned I = 0; I < 8; ++I)
MRI->mapLLVMRegToCVReg(X86::XMM0 + I, CVXMM0Start + I);
// The high 8 XMM registers start at 252 and are numbered sequentially.
unsigned CVXMM8Start = 252;
for (unsigned I = 0; I < 8; ++I)
MRI->mapLLVMRegToCVReg(X86::XMM8 + I, CVXMM8Start + I);
// FIXME: XMM16 and above from AVX512 not yet documented.
// AMD64 registers start at 324 and count up.
unsigned CVX64RegStart = 324;
static const MCPhysReg CVX64Regs[] = {
X86::SIL, X86::DIL, X86::BPL, X86::SPL, X86::RAX, X86::RBX,
X86::RCX, X86::RDX, X86::RSI, X86::RDI, X86::RBP, X86::RSP,
X86::R8, X86::R9, X86::R10, X86::R11, X86::R12, X86::R13,
X86::R14, X86::R15, X86::R8B, X86::R9B, X86::R10B, X86::R11B,
X86::R12B, X86::R13B, X86::R14B, X86::R15B, X86::R8W, X86::R9W,
X86::R10W, X86::R11W, X86::R12W, X86::R13W, X86::R14W, X86::R15W,
X86::R8D, X86::R9D, X86::R10D, X86::R11D, X86::R12D, X86::R13D,
X86::R14D, X86::R15D, X86::YMM0, X86::YMM1, X86::YMM2, X86::YMM3,
X86::YMM4, X86::YMM5, X86::YMM6, X86::YMM7, X86::YMM8, X86::YMM9,
X86::YMM10, X86::YMM11, X86::YMM12, X86::YMM13, X86::YMM14, X86::YMM15,
};
for (unsigned I = 0; I < array_lengthof(CVX64Regs); ++I)
MRI->mapLLVMRegToCVReg(CVX64Regs[I], CVX64RegStart + I);
}
MCSubtargetInfo *X86_MC::createX86MCSubtargetInfo(const Triple &TT,
StringRef CPU, StringRef FS) {
std::string ArchFS = X86_MC::ParseX86Triple(TT);
if (!FS.empty()) {
if (!ArchFS.empty())
ArchFS = (Twine(ArchFS) + "," + FS).str();
else
ArchFS = FS;
}
std::string CPUName = CPU;
if (CPUName.empty())
CPUName = "generic";
return createX86MCSubtargetInfoImpl(TT, CPUName, ArchFS);
}
static MCInstrInfo *createX86MCInstrInfo() {
MCInstrInfo *X = new MCInstrInfo();
InitX86MCInstrInfo(X);
return X;
}
static MCRegisterInfo *createX86MCRegisterInfo(const Triple &TT) {
unsigned RA = (TT.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::initLLVMToSEHAndCVRegMapping(X);
return X;
}
static MCAsmInfo *createX86MCAsmInfo(const MCRegisterInfo &MRI,
const Triple &TheTriple) {
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() ||
TheTriple.isWindowsCoreCLREnvironment()) {
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(const Triple &TT, Reloc::Model RM,
CodeModel::Model CM,
CodeGenOpt::Level OL) {
MCCodeGenInfo *X = new MCCodeGenInfo();
bool is64Bit = TT.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 (TT.isOSDarwin()) {
if (is64Bit)
RM = Reloc::PIC_;
else
RM = Reloc::DynamicNoPIC;
} else if (TT.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 (!TT.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 && TT.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 MCInstPrinter *createX86MCInstPrinter(const Triple &T,
unsigned SyntaxVariant,
const MCAsmInfo &MAI,
const MCInstrInfo &MII,
const MCRegisterInfo &MRI) {
if (SyntaxVariant == 0)
return new X86ATTInstPrinter(MAI, MII, MRI);
if (SyntaxVariant == 1)
return new X86IntelInstPrinter(MAI, MII, MRI);
return nullptr;
}
static MCRelocationInfo *createX86MCRelocationInfo(const Triple &TheTriple,
MCContext &Ctx) {
// Default to the stock relocation info.
return llvm::createMCRelocationInfo(TheTriple, Ctx);
}
static MCInstrAnalysis *createX86MCInstrAnalysis(const MCInstrInfo *Info) {
return new MCInstrAnalysis(Info);
}
// Force static initialization.
extern "C" void LLVMInitializeX86TargetMC() {
for (Target *T : {&TheX86_32Target, &TheX86_64Target}) {
// Register the MC asm info.
RegisterMCAsmInfoFn X(*T, createX86MCAsmInfo);
// Register the MC codegen info.
RegisterMCCodeGenInfoFn Y(*T, createX86MCCodeGenInfo);
// Register the MC instruction info.
TargetRegistry::RegisterMCInstrInfo(*T, createX86MCInstrInfo);
// Register the MC register info.
TargetRegistry::RegisterMCRegInfo(*T, createX86MCRegisterInfo);
// Register the MC subtarget info.
TargetRegistry::RegisterMCSubtargetInfo(*T,
X86_MC::createX86MCSubtargetInfo);
// Register the MC instruction analyzer.
TargetRegistry::RegisterMCInstrAnalysis(*T, createX86MCInstrAnalysis);
// Register the code emitter.
TargetRegistry::RegisterMCCodeEmitter(*T, createX86MCCodeEmitter);
// Register the object streamer.
TargetRegistry::RegisterCOFFStreamer(*T, createX86WinCOFFStreamer);
// Register the MCInstPrinter.
TargetRegistry::RegisterMCInstPrinter(*T, createX86MCInstPrinter);
// Register the MC relocation info.
TargetRegistry::RegisterMCRelocationInfo(*T, createX86MCRelocationInfo);
}
// Register the asm backend.
TargetRegistry::RegisterMCAsmBackend(TheX86_32Target,
createX86_32AsmBackend);
TargetRegistry::RegisterMCAsmBackend(TheX86_64Target,
createX86_64AsmBackend);
}
unsigned llvm::getX86SubSuperRegisterOrZero(unsigned Reg, unsigned Size,
bool High) {
switch (Size) {
default: return 0;
case 8:
if (High) {
switch (Reg) {
default: return getX86SubSuperRegisterOrZero(Reg, 64);
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
return X86::SI;
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
return X86::DI;
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
return X86::BP;
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
return X86::SP;
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
return X86::AH;
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
return X86::DH;
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
return X86::CH;
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
return X86::BH;
}
} else {
switch (Reg) {
default: return 0;
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
return X86::AL;
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
return X86::DL;
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
return X86::CL;
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
return X86::BL;
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
return X86::SIL;
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
return X86::DIL;
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
return X86::BPL;
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
return X86::SPL;
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
return X86::R8B;
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
return X86::R9B;
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
return X86::R10B;
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
return X86::R11B;
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
return X86::R12B;
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
return X86::R13B;
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
return X86::R14B;
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
return X86::R15B;
}
}
case 16:
switch (Reg) {
default: return 0;
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
return X86::AX;
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
return X86::DX;
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
return X86::CX;
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
return X86::BX;
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
return X86::SI;
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
return X86::DI;
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
return X86::BP;
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
return X86::SP;
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
return X86::R8W;
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
return X86::R9W;
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
return X86::R10W;
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
return X86::R11W;
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
return X86::R12W;
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
return X86::R13W;
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
return X86::R14W;
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
return X86::R15W;
}
case 32:
switch (Reg) {
default: return 0;
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
return X86::EAX;
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
return X86::EDX;
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
return X86::ECX;
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
return X86::EBX;
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
return X86::ESI;
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
return X86::EDI;
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
return X86::EBP;
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
return X86::ESP;
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
return X86::R8D;
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
return X86::R9D;
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
return X86::R10D;
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
return X86::R11D;
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
return X86::R12D;
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
return X86::R13D;
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
return X86::R14D;
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
return X86::R15D;
}
case 64:
switch (Reg) {
default: return 0;
case X86::AH: case X86::AL: case X86::AX: case X86::EAX: case X86::RAX:
return X86::RAX;
case X86::DH: case X86::DL: case X86::DX: case X86::EDX: case X86::RDX:
return X86::RDX;
case X86::CH: case X86::CL: case X86::CX: case X86::ECX: case X86::RCX:
return X86::RCX;
case X86::BH: case X86::BL: case X86::BX: case X86::EBX: case X86::RBX:
return X86::RBX;
case X86::SIL: case X86::SI: case X86::ESI: case X86::RSI:
return X86::RSI;
case X86::DIL: case X86::DI: case X86::EDI: case X86::RDI:
return X86::RDI;
case X86::BPL: case X86::BP: case X86::EBP: case X86::RBP:
return X86::RBP;
case X86::SPL: case X86::SP: case X86::ESP: case X86::RSP:
return X86::RSP;
case X86::R8B: case X86::R8W: case X86::R8D: case X86::R8:
return X86::R8;
case X86::R9B: case X86::R9W: case X86::R9D: case X86::R9:
return X86::R9;
case X86::R10B: case X86::R10W: case X86::R10D: case X86::R10:
return X86::R10;
case X86::R11B: case X86::R11W: case X86::R11D: case X86::R11:
return X86::R11;
case X86::R12B: case X86::R12W: case X86::R12D: case X86::R12:
return X86::R12;
case X86::R13B: case X86::R13W: case X86::R13D: case X86::R13:
return X86::R13;
case X86::R14B: case X86::R14W: case X86::R14D: case X86::R14:
return X86::R14;
case X86::R15B: case X86::R15W: case X86::R15D: case X86::R15:
return X86::R15;
}
}
}
unsigned llvm::getX86SubSuperRegister(unsigned Reg, unsigned Size, bool High) {
unsigned Res = getX86SubSuperRegisterOrZero(Reg, Size, High);
assert(Res != 0 && "Unexpected register or VT");
return Res;
}
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