[llvm-commits] [llvm] r107937 - /llvm/trunk/lib/Target/X86/X86MCCodeEmitter.cpp
Bruno Cardoso Lopes
bruno.cardoso at gmail.com
Thu Jul 8 17:07:19 PDT 2010
Author: bruno
Date: Thu Jul 8 19:07:19 2010
New Revision: 107937
URL: http://llvm.org/viewvc/llvm-project?rev=107937&view=rev
Log:
Remove trailing whitespaces from file
Modified:
llvm/trunk/lib/Target/X86/X86MCCodeEmitter.cpp
Modified: llvm/trunk/lib/Target/X86/X86MCCodeEmitter.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86MCCodeEmitter.cpp?rev=107937&r1=107936&r2=107937&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86MCCodeEmitter.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86MCCodeEmitter.cpp Thu Jul 8 19:07:19 2010
@@ -30,7 +30,7 @@
MCContext &Ctx;
bool Is64BitMode;
public:
- X86MCCodeEmitter(TargetMachine &tm, MCContext &ctx, bool is64Bit)
+ X86MCCodeEmitter(TargetMachine &tm, MCContext &ctx, bool is64Bit)
: TM(tm), TII(*TM.getInstrInfo()), Ctx(ctx) {
Is64BitMode = is64Bit;
}
@@ -49,7 +49,7 @@
{ "reloc_riprel_4byte", 0, 4 * 8, MCFixupKindInfo::FKF_IsPCRel },
{ "reloc_riprel_4byte_movq_load", 0, 4 * 8, MCFixupKindInfo::FKF_IsPCRel }
};
-
+
if (Kind < FirstTargetFixupKind)
return MCCodeEmitter::getFixupKindInfo(Kind);
@@ -57,7 +57,7 @@
"Invalid kind!");
return Infos[Kind - FirstTargetFixupKind];
}
-
+
static unsigned GetX86RegNum(const MCOperand &MO) {
return X86RegisterInfo::getX86RegNum(MO.getReg());
}
@@ -77,17 +77,17 @@
unsigned SrcRegNum = GetX86RegNum(MI.getOperand(OpNum));
if (SrcReg >= X86::XMM8 && SrcReg <= X86::XMM15)
SrcRegNum += 8;
-
+
// The registers represented through VEX_VVVV should
// be encoded in 1's complement form.
return (~SrcRegNum) & 0xf;
}
-
+
void EmitByte(unsigned char C, unsigned &CurByte, raw_ostream &OS) const {
OS << (char)C;
++CurByte;
}
-
+
void EmitConstant(uint64_t Val, unsigned Size, unsigned &CurByte,
raw_ostream &OS) const {
// Output the constant in little endian byte order.
@@ -97,38 +97,38 @@
}
}
- void EmitImmediate(const MCOperand &Disp,
+ void EmitImmediate(const MCOperand &Disp,
unsigned ImmSize, MCFixupKind FixupKind,
unsigned &CurByte, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups,
int ImmOffset = 0) const;
-
+
inline static unsigned char ModRMByte(unsigned Mod, unsigned RegOpcode,
unsigned RM) {
assert(Mod < 4 && RegOpcode < 8 && RM < 8 && "ModRM Fields out of range!");
return RM | (RegOpcode << 3) | (Mod << 6);
}
-
+
void EmitRegModRMByte(const MCOperand &ModRMReg, unsigned RegOpcodeFld,
unsigned &CurByte, raw_ostream &OS) const {
EmitByte(ModRMByte(3, RegOpcodeFld, GetX86RegNum(ModRMReg)), CurByte, OS);
}
-
+
void EmitSIBByte(unsigned SS, unsigned Index, unsigned Base,
unsigned &CurByte, raw_ostream &OS) const {
// SIB byte is in the same format as the ModRMByte.
EmitByte(ModRMByte(SS, Index, Base), CurByte, OS);
}
-
-
+
+
void EmitMemModRMByte(const MCInst &MI, unsigned Op,
- unsigned RegOpcodeField,
+ unsigned RegOpcodeField,
uint64_t TSFlags, unsigned &CurByte, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups) const;
-
+
void EncodeInstruction(const MCInst &MI, raw_ostream &OS,
SmallVectorImpl<MCFixup> &Fixups) const;
-
+
void EmitVEXOpcodePrefix(uint64_t TSFlags, unsigned &CurByte,
const MCInst &MI, const TargetInstrDesc &Desc,
raw_ostream &OS) const;
@@ -153,8 +153,8 @@
return new X86MCCodeEmitter(TM, Ctx, true);
}
-/// isDisp8 - Return true if this signed displacement fits in a 8-bit
-/// sign-extended field.
+/// isDisp8 - Return true if this signed displacement fits in a 8-bit
+/// sign-extended field.
static bool isDisp8(int Value) {
return Value == (signed char)Value;
}
@@ -164,7 +164,7 @@
static MCFixupKind getImmFixupKind(uint64_t TSFlags) {
unsigned Size = X86II::getSizeOfImm(TSFlags);
bool isPCRel = X86II::isImmPCRel(TSFlags);
-
+
switch (Size) {
default: assert(0 && "Unknown immediate size");
case 1: return isPCRel ? MCFixupKind(X86::reloc_pcrel_1byte) : FK_Data_1;
@@ -190,7 +190,7 @@
// If we have an immoffset, add it to the expression.
const MCExpr *Expr = DispOp.getExpr();
-
+
// If the fixup is pc-relative, we need to bias the value to be relative to
// the start of the field, not the end of the field.
if (FixupKind == MCFixupKind(X86::reloc_pcrel_4byte) ||
@@ -201,11 +201,11 @@
ImmOffset -= 2;
if (FixupKind == MCFixupKind(X86::reloc_pcrel_1byte))
ImmOffset -= 1;
-
+
if (ImmOffset)
Expr = MCBinaryExpr::CreateAdd(Expr, MCConstantExpr::Create(ImmOffset, Ctx),
Ctx);
-
+
// Emit a symbolic constant as a fixup and 4 zeros.
Fixups.push_back(MCFixup::Create(CurByte, Expr, FixupKind));
EmitConstant(0, Size, CurByte, OS);
@@ -221,43 +221,43 @@
const MCOperand &Scale = MI.getOperand(Op+1);
const MCOperand &IndexReg = MI.getOperand(Op+2);
unsigned BaseReg = Base.getReg();
-
+
// Handle %rip relative addressing.
if (BaseReg == X86::RIP) { // [disp32+RIP] in X86-64 mode
assert(Is64BitMode && "Rip-relative addressing requires 64-bit mode");
assert(IndexReg.getReg() == 0 && "Invalid rip-relative address");
EmitByte(ModRMByte(0, RegOpcodeField, 5), CurByte, OS);
-
+
unsigned FixupKind = X86::reloc_riprel_4byte;
-
+
// movq loads are handled with a special relocation form which allows the
// linker to eliminate some loads for GOT references which end up in the
// same linkage unit.
if (MI.getOpcode() == X86::MOV64rm ||
MI.getOpcode() == X86::MOV64rm_TC)
FixupKind = X86::reloc_riprel_4byte_movq_load;
-
+
// rip-relative addressing is actually relative to the *next* instruction.
// Since an immediate can follow the mod/rm byte for an instruction, this
// means that we need to bias the immediate field of the instruction with
// the size of the immediate field. If we have this case, add it into the
// expression to emit.
int ImmSize = X86II::hasImm(TSFlags) ? X86II::getSizeOfImm(TSFlags) : 0;
-
+
EmitImmediate(Disp, 4, MCFixupKind(FixupKind),
CurByte, OS, Fixups, -ImmSize);
return;
}
-
+
unsigned BaseRegNo = BaseReg ? GetX86RegNum(Base) : -1U;
-
+
// Determine whether a SIB byte is needed.
- // If no BaseReg, issue a RIP relative instruction only if the MCE can
+ // If no BaseReg, issue a RIP relative instruction only if the MCE can
// resolve addresses on-the-fly, otherwise use SIB (Intel Manual 2A, table
// 2-7) and absolute references.
if (// The SIB byte must be used if there is an index register.
- IndexReg.getReg() == 0 &&
+ IndexReg.getReg() == 0 &&
// The SIB byte must be used if the base is ESP/RSP/R12, all of which
// encode to an R/M value of 4, which indicates that a SIB byte is
// present.
@@ -271,7 +271,7 @@
EmitImmediate(Disp, 4, FK_Data_4, CurByte, OS, Fixups);
return;
}
-
+
// If the base is not EBP/ESP and there is no displacement, use simple
// indirect register encoding, this handles addresses like [EAX]. The
// encoding for [EBP] with no displacement means [disp32] so we handle it
@@ -280,24 +280,24 @@
EmitByte(ModRMByte(0, RegOpcodeField, BaseRegNo), CurByte, OS);
return;
}
-
+
// Otherwise, if the displacement fits in a byte, encode as [REG+disp8].
if (Disp.isImm() && isDisp8(Disp.getImm())) {
EmitByte(ModRMByte(1, RegOpcodeField, BaseRegNo), CurByte, OS);
EmitImmediate(Disp, 1, FK_Data_1, CurByte, OS, Fixups);
return;
}
-
+
// Otherwise, emit the most general non-SIB encoding: [REG+disp32]
EmitByte(ModRMByte(2, RegOpcodeField, BaseRegNo), CurByte, OS);
EmitImmediate(Disp, 4, FK_Data_4, CurByte, OS, Fixups);
return;
}
-
+
// We need a SIB byte, so start by outputting the ModR/M byte first
assert(IndexReg.getReg() != X86::ESP &&
IndexReg.getReg() != X86::RSP && "Cannot use ESP as index reg!");
-
+
bool ForceDisp32 = false;
bool ForceDisp8 = false;
if (BaseReg == 0) {
@@ -323,13 +323,13 @@
// Emit the normal disp32 encoding.
EmitByte(ModRMByte(2, RegOpcodeField, 4), CurByte, OS);
}
-
+
// Calculate what the SS field value should be...
static const unsigned SSTable[] = { ~0, 0, 1, ~0, 2, ~0, ~0, ~0, 3 };
unsigned SS = SSTable[Scale.getImm()];
-
+
if (BaseReg == 0) {
- // Handle the SIB byte for the case where there is no base, see Intel
+ // Handle the SIB byte for the case where there is no base, see Intel
// Manual 2A, table 2-7. The displacement has already been output.
unsigned IndexRegNo;
if (IndexReg.getReg())
@@ -345,7 +345,7 @@
IndexRegNo = 4; // For example [ESP+1*<noreg>+4]
EmitSIBByte(SS, IndexRegNo, GetX86RegNum(Base), CurByte, OS);
}
-
+
// Do we need to output a displacement?
if (ForceDisp8)
EmitImmediate(Disp, 1, FK_Data_1, CurByte, OS, Fixups);
@@ -547,18 +547,18 @@
// Pseudo instructions never have a rex byte.
if ((TSFlags & X86II::FormMask) == X86II::Pseudo)
return 0;
-
+
unsigned REX = 0;
if (TSFlags & X86II::REX_W)
REX |= 1 << 3; // set REX.W
-
+
if (MI.getNumOperands() == 0) return REX;
-
+
unsigned NumOps = MI.getNumOperands();
// FIXME: MCInst should explicitize the two-addrness.
bool isTwoAddr = NumOps > 1 &&
Desc.getOperandConstraint(1, TOI::TIED_TO) != -1;
-
+
// If it accesses SPL, BPL, SIL, or DIL, then it requires a 0x40 REX prefix.
unsigned i = isTwoAddr ? 1 : 0;
for (; i != NumOps; ++i) {
@@ -571,7 +571,7 @@
REX |= 0x40; // REX fixed encoding prefix
break;
}
-
+
switch (TSFlags & X86II::FormMask) {
case X86II::MRMInitReg: assert(0 && "FIXME: Remove this!");
case X86II::MRMSrcReg:
@@ -642,14 +642,14 @@
/// MemOperand is the operand # of the start of a memory operand if present. If
/// Not present, it is -1.
void X86MCCodeEmitter::EmitOpcodePrefix(uint64_t TSFlags, unsigned &CurByte,
- int MemOperand, const MCInst &MI,
+ int MemOperand, const MCInst &MI,
const TargetInstrDesc &Desc,
raw_ostream &OS) const {
// Emit the lock opcode prefix as needed.
if (TSFlags & X86II::LOCK)
EmitByte(0xF0, CurByte, OS);
-
+
// Emit segment override opcode prefix as needed.
switch (TSFlags & X86II::SegOvrMask) {
default: assert(0 && "Invalid segment!");
@@ -675,19 +675,19 @@
EmitByte(0x65, CurByte, OS);
break;
}
-
+
// Emit the repeat opcode prefix as needed.
if ((TSFlags & X86II::Op0Mask) == X86II::REP)
EmitByte(0xF3, CurByte, OS);
-
+
// Emit the operand size opcode prefix as needed.
if (TSFlags & X86II::OpSize)
EmitByte(0x66, CurByte, OS);
-
+
// Emit the address size opcode prefix as needed.
if (TSFlags & X86II::AdSize)
EmitByte(0x67, CurByte, OS);
-
+
bool Need0FPrefix = false;
switch (TSFlags & X86II::Op0Mask) {
default: assert(0 && "Invalid prefix!");
@@ -719,18 +719,18 @@
case X86II::DE: EmitByte(0xDE, CurByte, OS); break;
case X86II::DF: EmitByte(0xDF, CurByte, OS); break;
}
-
+
// Handle REX prefix.
// FIXME: Can this come before F2 etc to simplify emission?
if (Is64BitMode) {
if (unsigned REX = DetermineREXPrefix(MI, TSFlags, Desc))
EmitByte(0x40 | REX, CurByte, OS);
}
-
+
// 0x0F escape code must be emitted just before the opcode.
if (Need0FPrefix)
EmitByte(0x0F, CurByte, OS);
-
+
// FIXME: Pull this up into previous switch if REX can be moved earlier.
switch (TSFlags & X86II::Op0Mask) {
case X86II::TF: // F2 0F 38
@@ -750,7 +750,7 @@
const TargetInstrDesc &Desc = TII.get(Opcode);
uint64_t TSFlags = Desc.TSFlags;
-
+
// If this is a two-address instruction, skip one of the register operands.
// FIXME: This should be handled during MCInst lowering.
unsigned NumOps = Desc.getNumOperands();
@@ -760,10 +760,10 @@
else if (NumOps > 2 && Desc.getOperandConstraint(NumOps-1, TOI::TIED_TO)== 0)
// Skip the last source operand that is tied_to the dest reg. e.g. LXADD32
--NumOps;
-
+
// Keep track of the current byte being emitted.
unsigned CurByte = 0;
-
+
// Is this instruction encoded using the AVX VEX prefix?
bool HasVEXPrefix = false;
@@ -774,17 +774,17 @@
HasVEXPrefix = true;
if ((TSFlags >> 32) & X86II::VEX_4V)
HasVEX_4V = true;
-
+
// Determine where the memory operand starts, if present.
int MemoryOperand = X86II::getMemoryOperandNo(TSFlags);
if (MemoryOperand != -1) MemoryOperand += CurOp;
-
+
if (!HasVEXPrefix)
EmitOpcodePrefix(TSFlags, CurByte, MemoryOperand, MI, Desc, OS);
else
// FIXME: Segment overrides??
EmitVEXOpcodePrefix(TSFlags, CurByte, MI, Desc, OS);
-
+
unsigned char BaseOpcode = X86II::getBaseOpcodeFor(TSFlags);
unsigned SrcRegNum = 0;
switch (TSFlags & X86II::FormMask) {
@@ -796,18 +796,18 @@
case X86II::RawFrm:
EmitByte(BaseOpcode, CurByte, OS);
break;
-
+
case X86II::AddRegFrm:
EmitByte(BaseOpcode + GetX86RegNum(MI.getOperand(CurOp++)), CurByte, OS);
break;
-
+
case X86II::MRMDestReg:
EmitByte(BaseOpcode, CurByte, OS);
EmitRegModRMByte(MI.getOperand(CurOp),
GetX86RegNum(MI.getOperand(CurOp+1)), CurByte, OS);
CurOp += 2;
break;
-
+
case X86II::MRMDestMem:
EmitByte(BaseOpcode, CurByte, OS);
EmitMemModRMByte(MI, CurOp,
@@ -815,7 +815,7 @@
TSFlags, CurByte, OS, Fixups);
CurOp += X86::AddrNumOperands + 1;
break;
-
+
case X86II::MRMSrcReg:
EmitByte(BaseOpcode, CurByte, OS);
SrcRegNum = CurOp + 1;
@@ -827,7 +827,7 @@
GetX86RegNum(MI.getOperand(CurOp)), CurByte, OS);
CurOp = SrcRegNum + 1;
break;
-
+
case X86II::MRMSrcMem: {
int AddrOperands = X86::AddrNumOperands;
unsigned FirstMemOp = CurOp+1;
@@ -837,7 +837,7 @@
}
EmitByte(BaseOpcode, CurByte, OS);
-
+
EmitMemModRMByte(MI, FirstMemOp, GetX86RegNum(MI.getOperand(CurOp)),
TSFlags, CurByte, OS, Fixups);
CurOp += AddrOperands + 1;
@@ -905,7 +905,7 @@
EmitByte(0xF9, CurByte, OS);
break;
}
-
+
// If there is a remaining operand, it must be a trailing immediate. Emit it
// according to the right size for the instruction.
if (CurOp != NumOps) {
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