X86MCCodeEmitter.cpp File Reference

#include "MCTargetDesc/X86MCTargetDesc.h"
#include "MCTargetDesc/X86BaseInfo.h"
#include "MCTargetDesc/X86FixupKinds.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/raw_ostream.h"

Include dependency graph for X86MCCodeEmitter.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "mccodeemitter"

Enumerations
enum	GlobalOffsetTableExprKind { GOT_None, GOT_Normal, GOT_SymDiff }

Functions
static bool	isDisp8 (int Value)
static bool	isCDisp8 (uint64_t TSFlags, int Value, int &CValue)
static MCFixupKind	getImmFixupKind (uint64_t TSFlags)
static bool	Is32BitMemOperand (const MCInst &MI, unsigned Op)
static bool	Is64BitMemOperand (const MCInst &MI, unsigned Op)
static bool	Is16BitMemOperand (const MCInst &MI, unsigned Op)
static GlobalOffsetTableExprKind	StartsWithGlobalOffsetTable (const MCExpr *Expr)
static bool	HasSecRelSymbolRef (const MCExpr *Expr)
static unsigned	DetermineREXPrefix (const MCInst &MI, uint64_t TSFlags, const MCInstrDesc &Desc)

Macro Definition Documentation

#define DEBUG_TYPE   "mccodeemitter"

Definition at line 14 of file X86MCCodeEmitter.cpp.

Enumeration Type Documentation

enum GlobalOffsetTableExprKind

StartsWithGlobalOffsetTable - Check if this expression starts with GLOBAL_OFFSET_TABLE and if it is of the form GLOBAL_OFFSET_TABLE-symbol. This is needed to support PIC on ELF i386 as GLOBAL_OFFSET_TABLE is magical. We check only simple case that are know to be used: GLOBAL_OFFSET_TABLE by itself or at the start of a binary expression.

Enumerator
GOT_None
GOT_Normal
GOT_SymDiff

Definition at line 268 of file X86MCCodeEmitter.cpp.

Function Documentation

static unsigned DetermineREXPrefix ( const MCInst &  MI, uint64_t  TSFlags, const MCInstrDesc &  Desc  )

static

DetermineREXPrefix - Determine if the MCInst has to be encoded with a X86-64 REX prefix which specifies 1) 64-bit instructions, 2) non-default operand size, and 3) use of X86-64 extended registers.

Definition at line 950 of file X86MCCodeEmitter.cpp.

References llvm::X86::AddrNumOperands, llvm::tgtok::Bit, llvm::MCInst::getNumOperands(), llvm::MCInst::getOperand(), llvm::MCInstrDesc::getOperandConstraint(), llvm::MCOperand::getReg(), llvm::MCOperand::isReg(), llvm::X86II::isX86_64ExtendedReg(), llvm::X86II::isX86_64NonExtLowByteReg(), llvm_unreachable, llvm::X86II::MRM0m, llvm::X86II::MRM1m, llvm::X86II::MRM2m, llvm::X86II::MRM3m, llvm::X86II::MRM4m, llvm::X86II::MRM5m, llvm::X86II::MRM6m, llvm::X86II::MRM7m, llvm::X86II::MRMDestMem, llvm::X86II::MRMInitReg, llvm::X86II::MRMSrcMem, llvm::X86II::MRMSrcReg, llvm::X86II::REX_W, and llvm::MCOI::TIED_TO.

static MCFixupKind getImmFixupKind ( uint64_t  TSFlags )

static

getImmFixupKind - Return the appropriate fixup kind to use for an immediate in an instruction with the specified TSFlags.

Definition at line 211 of file X86MCCodeEmitter.cpp.

References llvm::MCFixup::getKindForSize(), llvm::X86II::getSizeOfImm(), and llvm::X86II::isImmPCRel().

static bool HasSecRelSymbolRef ( const MCExpr *  Expr )

static

Definition at line 294 of file X86MCCodeEmitter.cpp.

References llvm::MCExpr::getKind(), llvm::MCSymbolRefExpr::getKind(), llvm::MCExpr::SymbolRef, and llvm::MCSymbolRefExpr::VK_SECREL.

static bool Is16BitMemOperand ( const MCInst &  MI, unsigned  Op  )

static

Is16BitMemOperand - Return true if the specified instruction has a 16-bit memory operand. Op specifies the operand # of the memoperand.

Definition at line 250 of file X86MCCodeEmitter.cpp.

References llvm::X86::AddrBaseReg, llvm::X86::AddrIndexReg, llvm::MCInst::getOperand(), and llvm::MCOperand::getReg().

static bool Is32BitMemOperand ( const MCInst &  MI, unsigned  Op  )

static

Is32BitMemOperand - Return true if the specified instruction has a 32-bit memory operand. Op specifies the operand # of the memoperand.

Definition at line 220 of file X86MCCodeEmitter.cpp.

References llvm::X86::AddrBaseReg, llvm::X86::AddrIndexReg, llvm::MCInst::getOperand(), and llvm::MCOperand::getReg().

static bool Is64BitMemOperand ( const MCInst &  MI, unsigned  Op  )

static

Is64BitMemOperand - Return true if the specified instruction has a 64-bit memory operand. Op specifies the operand # of the memoperand.

Definition at line 235 of file X86MCCodeEmitter.cpp.

References llvm::X86::AddrBaseReg, llvm::X86::AddrIndexReg, llvm::MCInst::getOperand(), and llvm::MCOperand::getReg().

static bool isCDisp8 ( uint64_t  TSFlags, int  Value, int &  CValue  )

static

isCDisp8 - Return true if this signed displacement fits in a 8-bit compressed dispacement field.

Definition at line 165 of file X86MCCodeEmitter.cpp.

References llvm::X86II::EVEX, llvm::X86II::EVEX_B, llvm::X86II::EVEX_CD8EMask, llvm::X86II::EVEX_CD8EShift, llvm::X86II::EVEX_CD8VMask, llvm::X86II::EVEX_CD8VShift, llvm::X86II::EVEX_L2, isDisp8(), llvm::AArch64ISD::Ret, llvm::X86II::VEX_L, and llvm::X86II::VEXShift.

static bool isDisp8 ( int  Value )

static

isDisp8 - Return true if this signed displacement fits in a 8-bit sign-extended field.

Definition at line 159 of file X86MCCodeEmitter.cpp.

Referenced by isCDisp8().

static GlobalOffsetTableExprKind StartsWithGlobalOffsetTable ( const MCExpr *  Expr )

static

Definition at line 274 of file X86MCCodeEmitter.cpp.

References llvm::MCExpr::Binary, llvm::MCExpr::getKind(), llvm::MCBinaryExpr::getLHS(), llvm::MCSymbol::getName(), llvm::MCBinaryExpr::getRHS(), llvm::MCSymbolRefExpr::getSymbol(), GOT_None, GOT_Normal, GOT_SymDiff, and llvm::MCExpr::SymbolRef.