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llvm-6502/lib/Target/R600/AsmParser/AMDGPUAsmParser.cpp
Jim Grosbach 586c0042da MC: Clean up MCExpr naming. NFC. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238634 91177308-0d34-0410-b5e6-96231b3b80d8
2015-05-30 01:25:56 +00:00

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//===-- AMDGPUAsmParser.cpp - Parse SI asm to MCInst instructions ----------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "MCTargetDesc/AMDGPUMCTargetDesc.h"
#include "SIDefines.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstrInfo.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/Debug.h"
using namespace llvm;
namespace {
struct OptionalOperand;
class AMDGPUOperand : public MCParsedAsmOperand {
enum KindTy {
Token,
Immediate,
Register,
Expression
} Kind;
SMLoc StartLoc, EndLoc;
public:
AMDGPUOperand(enum KindTy K) : MCParsedAsmOperand(), Kind(K) {}
MCContext *Ctx;
enum ImmTy {
ImmTyNone,
ImmTyDSOffset0,
ImmTyDSOffset1,
ImmTyGDS,
ImmTyOffset,
ImmTyGLC,
ImmTySLC,
ImmTyTFE,
ImmTyClamp,
ImmTyOMod
};
struct TokOp {
const char *Data;
unsigned Length;
};
struct ImmOp {
bool IsFPImm;
ImmTy Type;
int64_t Val;
};
struct RegOp {
unsigned RegNo;
int Modifiers;
const MCRegisterInfo *TRI;
bool IsForcedVOP3;
};
union {
TokOp Tok;
ImmOp Imm;
RegOp Reg;
const MCExpr *Expr;
};
void addImmOperands(MCInst &Inst, unsigned N) const {
Inst.addOperand(MCOperand::createImm(getImm()));
}
StringRef getToken() const {
return StringRef(Tok.Data, Tok.Length);
}
void addRegOperands(MCInst &Inst, unsigned N) const {
Inst.addOperand(MCOperand::createReg(getReg()));
}
void addRegOrImmOperands(MCInst &Inst, unsigned N) const {
if (isReg())
addRegOperands(Inst, N);
else
addImmOperands(Inst, N);
}
void addRegWithInputModsOperands(MCInst &Inst, unsigned N) const {
Inst.addOperand(MCOperand::createImm(
Reg.Modifiers == -1 ? 0 : Reg.Modifiers));
addRegOperands(Inst, N);
}
void addSoppBrTargetOperands(MCInst &Inst, unsigned N) const {
if (isImm())
addImmOperands(Inst, N);
else {
assert(isExpr());
Inst.addOperand(MCOperand::createExpr(Expr));
}
}
bool defaultTokenHasSuffix() const {
StringRef Token(Tok.Data, Tok.Length);
return Token.endswith("_e32") || Token.endswith("_e64");
}
bool isToken() const override {
return Kind == Token;
}
bool isImm() const override {
return Kind == Immediate;
}
bool isInlineImm() const {
float F = BitsToFloat(Imm.Val);
// TODO: Add 0.5pi for VI
return isImm() && ((Imm.Val <= 64 && Imm.Val >= -16) ||
(F == 0.0 || F == 0.5 || F == -0.5 || F == 1.0 || F == -1.0 ||
F == 2.0 || F == -2.0 || F == 4.0 || F == -4.0));
}
bool isDSOffset0() const {
assert(isImm());
return Imm.Type == ImmTyDSOffset0;
}
bool isDSOffset1() const {
assert(isImm());
return Imm.Type == ImmTyDSOffset1;
}
int64_t getImm() const {
return Imm.Val;
}
enum ImmTy getImmTy() const {
assert(isImm());
return Imm.Type;
}
bool isRegKind() const {
return Kind == Register;
}
bool isReg() const override {
return Kind == Register && Reg.Modifiers == -1;
}
bool isRegWithInputMods() const {
return Kind == Register && (Reg.IsForcedVOP3 || Reg.Modifiers != -1);
}
void setModifiers(unsigned Mods) {
assert(isReg());
Reg.Modifiers = Mods;
}
bool hasModifiers() const {
assert(isRegKind());
return Reg.Modifiers != -1;
}
unsigned getReg() const override {
return Reg.RegNo;
}
bool isRegOrImm() const {
return isReg() || isImm();
}
bool isRegClass(unsigned RCID) const {
return Reg.TRI->getRegClass(RCID).contains(getReg());
}
bool isSCSrc32() const {
return isInlineImm() || (isReg() && isRegClass(AMDGPU::SReg_32RegClassID));
}
bool isSSrc32() const {
return isImm() || (isReg() && isRegClass(AMDGPU::SReg_32RegClassID));
}
bool isSSrc64() const {
return isImm() || isInlineImm() ||
(isReg() && isRegClass(AMDGPU::SReg_64RegClassID));
}
bool isVCSrc32() const {
return isInlineImm() || (isReg() && isRegClass(AMDGPU::VS_32RegClassID));
}
bool isVCSrc64() const {
return isInlineImm() || (isReg() && isRegClass(AMDGPU::VS_64RegClassID));
}
bool isVSrc32() const {
return isImm() || (isReg() && isRegClass(AMDGPU::VS_32RegClassID));
}
bool isVSrc64() const {
return isImm() || (isReg() && isRegClass(AMDGPU::VS_64RegClassID));
}
bool isMem() const override {
return false;
}
bool isExpr() const {
return Kind == Expression;
}
bool isSoppBrTarget() const {
return isExpr() || isImm();
}
SMLoc getStartLoc() const override {
return StartLoc;
}
SMLoc getEndLoc() const override {
return EndLoc;
}
void print(raw_ostream &OS) const override { }
static std::unique_ptr<AMDGPUOperand> CreateImm(int64_t Val, SMLoc Loc,
enum ImmTy Type = ImmTyNone,
bool IsFPImm = false) {
auto Op = llvm::make_unique<AMDGPUOperand>(Immediate);
Op->Imm.Val = Val;
Op->Imm.IsFPImm = IsFPImm;
Op->Imm.Type = Type;
Op->StartLoc = Loc;
Op->EndLoc = Loc;
return Op;
}
static std::unique_ptr<AMDGPUOperand> CreateToken(StringRef Str, SMLoc Loc,
bool HasExplicitEncodingSize = true) {
auto Res = llvm::make_unique<AMDGPUOperand>(Token);
Res->Tok.Data = Str.data();
Res->Tok.Length = Str.size();
Res->StartLoc = Loc;
Res->EndLoc = Loc;
return Res;
}
static std::unique_ptr<AMDGPUOperand> CreateReg(unsigned RegNo, SMLoc S,
SMLoc E,
const MCRegisterInfo *TRI,
bool ForceVOP3) {
auto Op = llvm::make_unique<AMDGPUOperand>(Register);
Op->Reg.RegNo = RegNo;
Op->Reg.TRI = TRI;
Op->Reg.Modifiers = -1;
Op->Reg.IsForcedVOP3 = ForceVOP3;
Op->StartLoc = S;
Op->EndLoc = E;
return Op;
}
static std::unique_ptr<AMDGPUOperand> CreateExpr(const class MCExpr *Expr, SMLoc S) {
auto Op = llvm::make_unique<AMDGPUOperand>(Expression);
Op->Expr = Expr;
Op->StartLoc = S;
Op->EndLoc = S;
return Op;
}
bool isDSOffset() const;
bool isDSOffset01() const;
bool isSWaitCnt() const;
bool isMubufOffset() const;
};
class AMDGPUAsmParser : public MCTargetAsmParser {
MCSubtargetInfo &STI;
const MCInstrInfo &MII;
MCAsmParser &Parser;
unsigned ForcedEncodingSize;
/// @name Auto-generated Match Functions
/// {
#define GET_ASSEMBLER_HEADER
#include "AMDGPUGenAsmMatcher.inc"
/// }
public:
AMDGPUAsmParser(MCSubtargetInfo &STI, MCAsmParser &_Parser,
const MCInstrInfo &MII,
const MCTargetOptions &Options)
: MCTargetAsmParser(), STI(STI), MII(MII), Parser(_Parser),
ForcedEncodingSize(0){
if (STI.getFeatureBits().none()) {
// Set default features.
STI.ToggleFeature("SOUTHERN_ISLANDS");
}
setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
}
unsigned getForcedEncodingSize() const {
return ForcedEncodingSize;
}
void setForcedEncodingSize(unsigned Size) {
ForcedEncodingSize = Size;
}
bool isForcedVOP3() const {
return ForcedEncodingSize == 64;
}
bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) override;
unsigned checkTargetMatchPredicate(MCInst &Inst) override;
bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
OperandVector &Operands, MCStreamer &Out,
uint64_t &ErrorInfo,
bool MatchingInlineAsm) override;
bool ParseDirective(AsmToken DirectiveID) override;
OperandMatchResultTy parseOperand(OperandVector &Operands, StringRef Mnemonic);
bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
SMLoc NameLoc, OperandVector &Operands) override;
OperandMatchResultTy parseIntWithPrefix(const char *Prefix, int64_t &Int,
int64_t Default = 0);
OperandMatchResultTy parseIntWithPrefix(const char *Prefix,
OperandVector &Operands,
enum AMDGPUOperand::ImmTy ImmTy =
AMDGPUOperand::ImmTyNone);
OperandMatchResultTy parseNamedBit(const char *Name, OperandVector &Operands,
enum AMDGPUOperand::ImmTy ImmTy =
AMDGPUOperand::ImmTyNone);
OperandMatchResultTy parseOptionalOps(
const ArrayRef<OptionalOperand> &OptionalOps,
OperandVector &Operands);
void cvtDSOffset01(MCInst &Inst, const OperandVector &Operands);
void cvtDS(MCInst &Inst, const OperandVector &Operands);
OperandMatchResultTy parseDSOptionalOps(OperandVector &Operands);
OperandMatchResultTy parseDSOff01OptionalOps(OperandVector &Operands);
OperandMatchResultTy parseDSOffsetOptional(OperandVector &Operands);
bool parseCnt(int64_t &IntVal);
OperandMatchResultTy parseSWaitCntOps(OperandVector &Operands);
OperandMatchResultTy parseSOppBrTarget(OperandVector &Operands);
void cvtMubuf(MCInst &Inst, const OperandVector &Operands);
OperandMatchResultTy parseOffset(OperandVector &Operands);
OperandMatchResultTy parseMubufOptionalOps(OperandVector &Operands);
OperandMatchResultTy parseGLC(OperandVector &Operands);
OperandMatchResultTy parseSLC(OperandVector &Operands);
OperandMatchResultTy parseTFE(OperandVector &Operands);
OperandMatchResultTy parseDMask(OperandVector &Operands);
OperandMatchResultTy parseUNorm(OperandVector &Operands);
OperandMatchResultTy parseR128(OperandVector &Operands);
void cvtVOP3(MCInst &Inst, const OperandVector &Operands);
OperandMatchResultTy parseVOP3OptionalOps(OperandVector &Operands);
};
struct OptionalOperand {
const char *Name;
AMDGPUOperand::ImmTy Type;
bool IsBit;
int64_t Default;
bool (*ConvertResult)(int64_t&);
};
}
static unsigned getRegClass(bool IsVgpr, unsigned RegWidth) {
if (IsVgpr) {
switch (RegWidth) {
default: llvm_unreachable("Unknown register width");
case 1: return AMDGPU::VGPR_32RegClassID;
case 2: return AMDGPU::VReg_64RegClassID;
case 3: return AMDGPU::VReg_96RegClassID;
case 4: return AMDGPU::VReg_128RegClassID;
case 8: return AMDGPU::VReg_256RegClassID;
case 16: return AMDGPU::VReg_512RegClassID;
}
}
switch (RegWidth) {
default: llvm_unreachable("Unknown register width");
case 1: return AMDGPU::SGPR_32RegClassID;
case 2: return AMDGPU::SGPR_64RegClassID;
case 4: return AMDGPU::SReg_128RegClassID;
case 8: return AMDGPU::SReg_256RegClassID;
case 16: return AMDGPU::SReg_512RegClassID;
}
}
static unsigned getRegForName(const StringRef &RegName) {
return StringSwitch<unsigned>(RegName)
.Case("exec", AMDGPU::EXEC)
.Case("vcc", AMDGPU::VCC)
.Case("flat_scr", AMDGPU::FLAT_SCR)
.Case("m0", AMDGPU::M0)
.Case("scc", AMDGPU::SCC)
.Case("flat_scr_lo", AMDGPU::FLAT_SCR_LO)
.Case("flat_scr_hi", AMDGPU::FLAT_SCR_HI)
.Case("vcc_lo", AMDGPU::VCC_LO)
.Case("vcc_hi", AMDGPU::VCC_HI)
.Case("exec_lo", AMDGPU::EXEC_LO)
.Case("exec_hi", AMDGPU::EXEC_HI)
.Default(0);
}
bool AMDGPUAsmParser::ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc) {
const AsmToken Tok = Parser.getTok();
StartLoc = Tok.getLoc();
EndLoc = Tok.getEndLoc();
const StringRef &RegName = Tok.getString();
RegNo = getRegForName(RegName);
if (RegNo) {
Parser.Lex();
return false;
}
// Match vgprs and sgprs
if (RegName[0] != 's' && RegName[0] != 'v')
return true;
bool IsVgpr = RegName[0] == 'v';
unsigned RegWidth;
unsigned RegIndexInClass;
if (RegName.size() > 1) {
// We have a 32-bit register
RegWidth = 1;
if (RegName.substr(1).getAsInteger(10, RegIndexInClass))
return true;
Parser.Lex();
} else {
// We have a register greater than 32-bits.
int64_t RegLo, RegHi;
Parser.Lex();
if (getLexer().isNot(AsmToken::LBrac))
return true;
Parser.Lex();
if (getParser().parseAbsoluteExpression(RegLo))
return true;
if (getLexer().isNot(AsmToken::Colon))
return true;
Parser.Lex();
if (getParser().parseAbsoluteExpression(RegHi))
return true;
if (getLexer().isNot(AsmToken::RBrac))
return true;
Parser.Lex();
RegWidth = (RegHi - RegLo) + 1;
if (IsVgpr) {
// VGPR registers aren't aligned.
RegIndexInClass = RegLo;
} else {
// SGPR registers are aligned. Max alignment is 4 dwords.
RegIndexInClass = RegLo / std::min(RegWidth, 4u);
}
}
const MCRegisterInfo *TRC = getContext().getRegisterInfo();
unsigned RC = getRegClass(IsVgpr, RegWidth);
if (RegIndexInClass > TRC->getRegClass(RC).getNumRegs())
return true;
RegNo = TRC->getRegClass(RC).getRegister(RegIndexInClass);
return false;
}
unsigned AMDGPUAsmParser::checkTargetMatchPredicate(MCInst &Inst) {
uint64_t TSFlags = MII.get(Inst.getOpcode()).TSFlags;
if ((getForcedEncodingSize() == 32 && (TSFlags & SIInstrFlags::VOP3)) ||
(getForcedEncodingSize() == 64 && !(TSFlags & SIInstrFlags::VOP3)))
return Match_InvalidOperand;
return Match_Success;
}
bool AMDGPUAsmParser::MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
OperandVector &Operands,
MCStreamer &Out,
uint64_t &ErrorInfo,
bool MatchingInlineAsm) {
MCInst Inst;
switch (MatchInstructionImpl(Operands, Inst, ErrorInfo, MatchingInlineAsm)) {
default: break;
case Match_Success:
Inst.setLoc(IDLoc);
Out.EmitInstruction(Inst, STI);
return false;
case Match_MissingFeature:
return Error(IDLoc, "instruction not supported on this GPU");
case Match_MnemonicFail:
return Error(IDLoc, "unrecognized instruction mnemonic");
case Match_InvalidOperand: {
SMLoc ErrorLoc = IDLoc;
if (ErrorInfo != ~0ULL) {
if (ErrorInfo >= Operands.size()) {
if (isForcedVOP3()) {
// If 64-bit encoding has been forced we can end up with no
// clamp or omod operands if none of the registers have modifiers,
// so we need to add these to the operand list.
AMDGPUOperand &LastOp =
((AMDGPUOperand &)*Operands[Operands.size() - 1]);
if (LastOp.isRegKind() ||
(LastOp.isImm() &&
LastOp.getImmTy() != AMDGPUOperand::ImmTyNone)) {
SMLoc S = Parser.getTok().getLoc();
Operands.push_back(AMDGPUOperand::CreateImm(0, S,
AMDGPUOperand::ImmTyClamp));
Operands.push_back(AMDGPUOperand::CreateImm(0, S,
AMDGPUOperand::ImmTyOMod));
bool Res = MatchAndEmitInstruction(IDLoc, Opcode, Operands,
Out, ErrorInfo,
MatchingInlineAsm);
if (!Res)
return Res;
}
}
return Error(IDLoc, "too few operands for instruction");
}
ErrorLoc = ((AMDGPUOperand &)*Operands[ErrorInfo]).getStartLoc();
if (ErrorLoc == SMLoc())
ErrorLoc = IDLoc;
}
return Error(ErrorLoc, "invalid operand for instruction");
}
}
llvm_unreachable("Implement any new match types added!");
}
bool AMDGPUAsmParser::ParseDirective(AsmToken DirectiveID) {
return true;
}
static bool operandsHaveModifiers(const OperandVector &Operands) {
for (unsigned i = 0, e = Operands.size(); i != e; ++i) {
const AMDGPUOperand &Op = ((AMDGPUOperand&)*Operands[i]);
if (Op.isRegKind() && Op.hasModifiers())
return true;
if (Op.isImm() && (Op.getImmTy() == AMDGPUOperand::ImmTyOMod ||
Op.getImmTy() == AMDGPUOperand::ImmTyClamp))
return true;
}
return false;
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseOperand(OperandVector &Operands, StringRef Mnemonic) {
// Try to parse with a custom parser
OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
// If we successfully parsed the operand or if there as an error parsing,
// we are done.
//
// If we are parsing after we reach EndOfStatement then this means we
// are appending default values to the Operands list. This is only done
// by custom parser, so we shouldn't continue on to the generic parsing.
if (ResTy == MatchOperand_Success || ResTy == MatchOperand_ParseFail ||
getLexer().is(AsmToken::EndOfStatement))
return ResTy;
bool Negate = false, Abs = false;
if (getLexer().getKind()== AsmToken::Minus) {
Parser.Lex();
Negate = true;
}
if (getLexer().getKind() == AsmToken::Pipe) {
Parser.Lex();
Abs = true;
}
switch(getLexer().getKind()) {
case AsmToken::Integer: {
SMLoc S = Parser.getTok().getLoc();
int64_t IntVal;
if (getParser().parseAbsoluteExpression(IntVal))
return MatchOperand_ParseFail;
APInt IntVal32(32, IntVal);
if (IntVal32.getSExtValue() != IntVal) {
Error(S, "invalid immediate: only 32-bit values are legal");
return MatchOperand_ParseFail;
}
IntVal = IntVal32.getSExtValue();
if (Negate)
IntVal *= -1;
Operands.push_back(AMDGPUOperand::CreateImm(IntVal, S));
return MatchOperand_Success;
}
case AsmToken::Real: {
// FIXME: We should emit an error if a double precisions floating-point
// value is used. I'm not sure the best way to detect this.
SMLoc S = Parser.getTok().getLoc();
int64_t IntVal;
if (getParser().parseAbsoluteExpression(IntVal))
return MatchOperand_ParseFail;
APFloat F((float)BitsToDouble(IntVal));
if (Negate)
F.changeSign();
Operands.push_back(
AMDGPUOperand::CreateImm(F.bitcastToAPInt().getZExtValue(), S));
return MatchOperand_Success;
}
case AsmToken::Identifier: {
SMLoc S, E;
unsigned RegNo;
if (!ParseRegister(RegNo, S, E)) {
bool HasModifiers = operandsHaveModifiers(Operands);
unsigned Modifiers = 0;
if (Negate)
Modifiers |= 0x1;
if (Abs) {
if (getLexer().getKind() != AsmToken::Pipe)
return MatchOperand_ParseFail;
Parser.Lex();
Modifiers |= 0x2;
}
if (Modifiers && !HasModifiers) {
// We are adding a modifier to src1 or src2 and previous sources
// don't have modifiers, so we need to go back and empty modifers
// for each previous source.
for (unsigned PrevRegIdx = Operands.size() - 1; PrevRegIdx > 1;
--PrevRegIdx) {
AMDGPUOperand &RegOp = ((AMDGPUOperand&)*Operands[PrevRegIdx]);
RegOp.setModifiers(0);
}
}
Operands.push_back(AMDGPUOperand::CreateReg(
RegNo, S, E, getContext().getRegisterInfo(),
isForcedVOP3()));
if (HasModifiers || Modifiers) {
AMDGPUOperand &RegOp = ((AMDGPUOperand&)*Operands[Operands.size() - 1]);
RegOp.setModifiers(Modifiers);
}
} else {
Operands.push_back(AMDGPUOperand::CreateToken(Parser.getTok().getString(),
S));
Parser.Lex();
}
return MatchOperand_Success;
}
default:
return MatchOperand_NoMatch;
}
}
bool AMDGPUAsmParser::ParseInstruction(ParseInstructionInfo &Info,
StringRef Name,
SMLoc NameLoc, OperandVector &Operands) {
// Clear any forced encodings from the previous instruction.
setForcedEncodingSize(0);
if (Name.endswith("_e64"))
setForcedEncodingSize(64);
else if (Name.endswith("_e32"))
setForcedEncodingSize(32);
// Add the instruction mnemonic
Operands.push_back(AMDGPUOperand::CreateToken(Name, NameLoc));
while (!getLexer().is(AsmToken::EndOfStatement)) {
AMDGPUAsmParser::OperandMatchResultTy Res = parseOperand(Operands, Name);
// Eat the comma or space if there is one.
if (getLexer().is(AsmToken::Comma))
Parser.Lex();
switch (Res) {
case MatchOperand_Success: break;
case MatchOperand_ParseFail: return Error(getLexer().getLoc(),
"failed parsing operand.");
case MatchOperand_NoMatch: return Error(getLexer().getLoc(),
"not a valid operand.");
}
}
// Once we reach end of statement, continue parsing so we can add default
// values for optional arguments.
AMDGPUAsmParser::OperandMatchResultTy Res;
while ((Res = parseOperand(Operands, Name)) != MatchOperand_NoMatch) {
if (Res != MatchOperand_Success)
return Error(getLexer().getLoc(), "failed parsing operand.");
}
return false;
}
//===----------------------------------------------------------------------===//
// Utility functions
//===----------------------------------------------------------------------===//
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseIntWithPrefix(const char *Prefix, int64_t &Int,
int64_t Default) {
// We are at the end of the statement, and this is a default argument, so
// use a default value.
if (getLexer().is(AsmToken::EndOfStatement)) {
Int = Default;
return MatchOperand_Success;
}
switch(getLexer().getKind()) {
default: return MatchOperand_NoMatch;
case AsmToken::Identifier: {
StringRef OffsetName = Parser.getTok().getString();
if (!OffsetName.equals(Prefix))
return MatchOperand_NoMatch;
Parser.Lex();
if (getLexer().isNot(AsmToken::Colon))
return MatchOperand_ParseFail;
Parser.Lex();
if (getLexer().isNot(AsmToken::Integer))
return MatchOperand_ParseFail;
if (getParser().parseAbsoluteExpression(Int))
return MatchOperand_ParseFail;
break;
}
}
return MatchOperand_Success;
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseIntWithPrefix(const char *Prefix, OperandVector &Operands,
enum AMDGPUOperand::ImmTy ImmTy) {
SMLoc S = Parser.getTok().getLoc();
int64_t Offset = 0;
AMDGPUAsmParser::OperandMatchResultTy Res = parseIntWithPrefix(Prefix, Offset);
if (Res != MatchOperand_Success)
return Res;
Operands.push_back(AMDGPUOperand::CreateImm(Offset, S, ImmTy));
return MatchOperand_Success;
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseNamedBit(const char *Name, OperandVector &Operands,
enum AMDGPUOperand::ImmTy ImmTy) {
int64_t Bit = 0;
SMLoc S = Parser.getTok().getLoc();
// We are at the end of the statement, and this is a default argument, so
// use a default value.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
switch(getLexer().getKind()) {
case AsmToken::Identifier: {
StringRef Tok = Parser.getTok().getString();
if (Tok == Name) {
Bit = 1;
Parser.Lex();
} else if (Tok.startswith("no") && Tok.endswith(Name)) {
Bit = 0;
Parser.Lex();
} else {
return MatchOperand_NoMatch;
}
break;
}
default:
return MatchOperand_NoMatch;
}
}
Operands.push_back(AMDGPUOperand::CreateImm(Bit, S, ImmTy));
return MatchOperand_Success;
}
static bool operandsHasOptionalOp(const OperandVector &Operands,
const OptionalOperand &OOp) {
for (unsigned i = 0; i < Operands.size(); i++) {
const AMDGPUOperand &ParsedOp = ((const AMDGPUOperand &)*Operands[i]);
if ((ParsedOp.isImm() && ParsedOp.getImmTy() == OOp.Type) ||
(ParsedOp.isToken() && ParsedOp.getToken() == OOp.Name))
return true;
}
return false;
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseOptionalOps(const ArrayRef<OptionalOperand> &OptionalOps,
OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
for (const OptionalOperand &Op : OptionalOps) {
if (operandsHasOptionalOp(Operands, Op))
continue;
AMDGPUAsmParser::OperandMatchResultTy Res;
int64_t Value;
if (Op.IsBit) {
Res = parseNamedBit(Op.Name, Operands, Op.Type);
if (Res == MatchOperand_NoMatch)
continue;
return Res;
}
Res = parseIntWithPrefix(Op.Name, Value, Op.Default);
if (Res == MatchOperand_NoMatch)
continue;
if (Res != MatchOperand_Success)
return Res;
if (Op.ConvertResult && !Op.ConvertResult(Value)) {
return MatchOperand_ParseFail;
}
Operands.push_back(AMDGPUOperand::CreateImm(Value, S, Op.Type));
return MatchOperand_Success;
}
return MatchOperand_NoMatch;
}
//===----------------------------------------------------------------------===//
// ds
//===----------------------------------------------------------------------===//
static const OptionalOperand DSOptionalOps [] = {
{"offset", AMDGPUOperand::ImmTyOffset, false, 0, nullptr},
{"gds", AMDGPUOperand::ImmTyGDS, true, 0, nullptr}
};
static const OptionalOperand DSOptionalOpsOff01 [] = {
{"offset0", AMDGPUOperand::ImmTyDSOffset0, false, 0, nullptr},
{"offset1", AMDGPUOperand::ImmTyDSOffset1, false, 0, nullptr},
{"gds", AMDGPUOperand::ImmTyGDS, true, 0, nullptr}
};
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseDSOptionalOps(OperandVector &Operands) {
return parseOptionalOps(DSOptionalOps, Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseDSOff01OptionalOps(OperandVector &Operands) {
return parseOptionalOps(DSOptionalOpsOff01, Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseDSOffsetOptional(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
AMDGPUAsmParser::OperandMatchResultTy Res =
parseIntWithPrefix("offset", Operands, AMDGPUOperand::ImmTyOffset);
if (Res == MatchOperand_NoMatch) {
Operands.push_back(AMDGPUOperand::CreateImm(0, S,
AMDGPUOperand::ImmTyOffset));
Res = MatchOperand_Success;
}
return Res;
}
bool AMDGPUOperand::isDSOffset() const {
return isImm() && isUInt<16>(getImm());
}
bool AMDGPUOperand::isDSOffset01() const {
return isImm() && isUInt<8>(getImm());
}
void AMDGPUAsmParser::cvtDSOffset01(MCInst &Inst,
const OperandVector &Operands) {
std::map<enum AMDGPUOperand::ImmTy, unsigned> OptionalIdx;
for (unsigned i = 1, e = Operands.size(); i != e; ++i) {
AMDGPUOperand &Op = ((AMDGPUOperand &)*Operands[i]);
// Add the register arguments
if (Op.isReg()) {
Op.addRegOperands(Inst, 1);
continue;
}
// Handle optional arguments
OptionalIdx[Op.getImmTy()] = i;
}
unsigned Offset0Idx = OptionalIdx[AMDGPUOperand::ImmTyDSOffset0];
unsigned Offset1Idx = OptionalIdx[AMDGPUOperand::ImmTyDSOffset1];
unsigned GDSIdx = OptionalIdx[AMDGPUOperand::ImmTyGDS];
((AMDGPUOperand &)*Operands[Offset0Idx]).addImmOperands(Inst, 1); // offset0
((AMDGPUOperand &)*Operands[Offset1Idx]).addImmOperands(Inst, 1); // offset1
((AMDGPUOperand &)*Operands[GDSIdx]).addImmOperands(Inst, 1); // gds
Inst.addOperand(MCOperand::createReg(AMDGPU::M0)); // m0
}
void AMDGPUAsmParser::cvtDS(MCInst &Inst, const OperandVector &Operands) {
std::map<enum AMDGPUOperand::ImmTy, unsigned> OptionalIdx;
bool GDSOnly = false;
for (unsigned i = 1, e = Operands.size(); i != e; ++i) {
AMDGPUOperand &Op = ((AMDGPUOperand &)*Operands[i]);
// Add the register arguments
if (Op.isReg()) {
Op.addRegOperands(Inst, 1);
continue;
}
if (Op.isToken() && Op.getToken() == "gds") {
GDSOnly = true;
continue;
}
// Handle optional arguments
OptionalIdx[Op.getImmTy()] = i;
}
unsigned OffsetIdx = OptionalIdx[AMDGPUOperand::ImmTyOffset];
((AMDGPUOperand &)*Operands[OffsetIdx]).addImmOperands(Inst, 1); // offset
if (!GDSOnly) {
unsigned GDSIdx = OptionalIdx[AMDGPUOperand::ImmTyGDS];
((AMDGPUOperand &)*Operands[GDSIdx]).addImmOperands(Inst, 1); // gds
}
Inst.addOperand(MCOperand::createReg(AMDGPU::M0)); // m0
}
//===----------------------------------------------------------------------===//
// s_waitcnt
//===----------------------------------------------------------------------===//
bool AMDGPUAsmParser::parseCnt(int64_t &IntVal) {
StringRef CntName = Parser.getTok().getString();
int64_t CntVal;
Parser.Lex();
if (getLexer().isNot(AsmToken::LParen))
return true;
Parser.Lex();
if (getLexer().isNot(AsmToken::Integer))
return true;
if (getParser().parseAbsoluteExpression(CntVal))
return true;
if (getLexer().isNot(AsmToken::RParen))
return true;
Parser.Lex();
if (getLexer().is(AsmToken::Amp) || getLexer().is(AsmToken::Comma))
Parser.Lex();
int CntShift;
int CntMask;
if (CntName == "vmcnt") {
CntMask = 0xf;
CntShift = 0;
} else if (CntName == "expcnt") {
CntMask = 0x7;
CntShift = 4;
} else if (CntName == "lgkmcnt") {
CntMask = 0x7;
CntShift = 8;
} else {
return true;
}
IntVal &= ~(CntMask << CntShift);
IntVal |= (CntVal << CntShift);
return false;
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseSWaitCntOps(OperandVector &Operands) {
// Disable all counters by default.
// vmcnt [3:0]
// expcnt [6:4]
// lgkmcnt [10:8]
int64_t CntVal = 0x77f;
SMLoc S = Parser.getTok().getLoc();
switch(getLexer().getKind()) {
default: return MatchOperand_ParseFail;
case AsmToken::Integer:
// The operand can be an integer value.
if (getParser().parseAbsoluteExpression(CntVal))
return MatchOperand_ParseFail;
break;
case AsmToken::Identifier:
do {
if (parseCnt(CntVal))
return MatchOperand_ParseFail;
} while(getLexer().isNot(AsmToken::EndOfStatement));
break;
}
Operands.push_back(AMDGPUOperand::CreateImm(CntVal, S));
return MatchOperand_Success;
}
bool AMDGPUOperand::isSWaitCnt() const {
return isImm();
}
//===----------------------------------------------------------------------===//
// sopp branch targets
//===----------------------------------------------------------------------===//
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseSOppBrTarget(OperandVector &Operands) {
SMLoc S = Parser.getTok().getLoc();
switch (getLexer().getKind()) {
default: return MatchOperand_ParseFail;
case AsmToken::Integer: {
int64_t Imm;
if (getParser().parseAbsoluteExpression(Imm))
return MatchOperand_ParseFail;
Operands.push_back(AMDGPUOperand::CreateImm(Imm, S));
return MatchOperand_Success;
}
case AsmToken::Identifier:
Operands.push_back(AMDGPUOperand::CreateExpr(
MCSymbolRefExpr::create(getContext().getOrCreateSymbol(
Parser.getTok().getString()), getContext()), S));
Parser.Lex();
return MatchOperand_Success;
}
}
//===----------------------------------------------------------------------===//
// mubuf
//===----------------------------------------------------------------------===//
static const OptionalOperand MubufOptionalOps [] = {
{"offset", AMDGPUOperand::ImmTyOffset, false, 0, nullptr},
{"glc", AMDGPUOperand::ImmTyGLC, true, 0, nullptr},
{"slc", AMDGPUOperand::ImmTySLC, true, 0, nullptr},
{"tfe", AMDGPUOperand::ImmTyTFE, true, 0, nullptr}
};
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseMubufOptionalOps(OperandVector &Operands) {
return parseOptionalOps(MubufOptionalOps, Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseOffset(OperandVector &Operands) {
return parseIntWithPrefix("offset", Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseGLC(OperandVector &Operands) {
return parseNamedBit("glc", Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseSLC(OperandVector &Operands) {
return parseNamedBit("slc", Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseTFE(OperandVector &Operands) {
return parseNamedBit("tfe", Operands);
}
bool AMDGPUOperand::isMubufOffset() const {
return isImm() && isUInt<12>(getImm());
}
void AMDGPUAsmParser::cvtMubuf(MCInst &Inst,
const OperandVector &Operands) {
std::map<enum AMDGPUOperand::ImmTy, unsigned> OptionalIdx;
for (unsigned i = 1, e = Operands.size(); i != e; ++i) {
AMDGPUOperand &Op = ((AMDGPUOperand &)*Operands[i]);
// Add the register arguments
if (Op.isReg()) {
Op.addRegOperands(Inst, 1);
continue;
}
// Handle the case where soffset is an immediate
if (Op.isImm() && Op.getImmTy() == AMDGPUOperand::ImmTyNone) {
Op.addImmOperands(Inst, 1);
continue;
}
// Handle tokens like 'offen' which are sometimes hard-coded into the
// asm string. There are no MCInst operands for these.
if (Op.isToken()) {
continue;
}
assert(Op.isImm());
// Handle optional arguments
OptionalIdx[Op.getImmTy()] = i;
}
assert(OptionalIdx.size() == 4);
unsigned OffsetIdx = OptionalIdx[AMDGPUOperand::ImmTyOffset];
unsigned GLCIdx = OptionalIdx[AMDGPUOperand::ImmTyGLC];
unsigned SLCIdx = OptionalIdx[AMDGPUOperand::ImmTySLC];
unsigned TFEIdx = OptionalIdx[AMDGPUOperand::ImmTyTFE];
((AMDGPUOperand &)*Operands[OffsetIdx]).addImmOperands(Inst, 1);
((AMDGPUOperand &)*Operands[GLCIdx]).addImmOperands(Inst, 1);
((AMDGPUOperand &)*Operands[SLCIdx]).addImmOperands(Inst, 1);
((AMDGPUOperand &)*Operands[TFEIdx]).addImmOperands(Inst, 1);
}
//===----------------------------------------------------------------------===//
// mimg
//===----------------------------------------------------------------------===//
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseDMask(OperandVector &Operands) {
return parseIntWithPrefix("dmask", Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseUNorm(OperandVector &Operands) {
return parseNamedBit("unorm", Operands);
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseR128(OperandVector &Operands) {
return parseNamedBit("r128", Operands);
}
//===----------------------------------------------------------------------===//
// vop3
//===----------------------------------------------------------------------===//
static bool ConvertOmodMul(int64_t &Mul) {
if (Mul != 1 && Mul != 2 && Mul != 4)
return false;
Mul >>= 1;
return true;
}
static bool ConvertOmodDiv(int64_t &Div) {
if (Div == 1) {
Div = 0;
return true;
}
if (Div == 2) {
Div = 3;
return true;
}
return false;
}
static const OptionalOperand VOP3OptionalOps [] = {
{"clamp", AMDGPUOperand::ImmTyClamp, true, 0, nullptr},
{"mul", AMDGPUOperand::ImmTyOMod, false, 1, ConvertOmodMul},
{"div", AMDGPUOperand::ImmTyOMod, false, 1, ConvertOmodDiv},
};
static bool isVOP3(OperandVector &Operands) {
if (operandsHaveModifiers(Operands))
return true;
AMDGPUOperand &DstOp = ((AMDGPUOperand&)*Operands[1]);
if (DstOp.isReg() && DstOp.isRegClass(AMDGPU::SGPR_64RegClassID))
return true;
if (Operands.size() >= 5)
return true;
if (Operands.size() > 3) {
AMDGPUOperand &Src1Op = ((AMDGPUOperand&)*Operands[3]);
if (Src1Op.getReg() && (Src1Op.isRegClass(AMDGPU::SReg_32RegClassID) ||
Src1Op.isRegClass(AMDGPU::SReg_64RegClassID)))
return true;
}
return false;
}
AMDGPUAsmParser::OperandMatchResultTy
AMDGPUAsmParser::parseVOP3OptionalOps(OperandVector &Operands) {
// The value returned by this function may change after parsing
// an operand so store the original value here.
bool HasModifiers = operandsHaveModifiers(Operands);
bool IsVOP3 = isVOP3(Operands);
if (HasModifiers || IsVOP3 ||
getLexer().isNot(AsmToken::EndOfStatement) ||
getForcedEncodingSize() == 64) {
AMDGPUAsmParser::OperandMatchResultTy Res =
parseOptionalOps(VOP3OptionalOps, Operands);
if (!HasModifiers && Res == MatchOperand_Success) {
// We have added a modifier operation, so we need to make sure all
// previous register operands have modifiers
for (unsigned i = 2, e = Operands.size(); i != e; ++i) {
AMDGPUOperand &Op = ((AMDGPUOperand&)*Operands[i]);
if (Op.isReg())
Op.setModifiers(0);
}
}
return Res;
}
return MatchOperand_NoMatch;
}
void AMDGPUAsmParser::cvtVOP3(MCInst &Inst, const OperandVector &Operands) {
((AMDGPUOperand &)*Operands[1]).addRegOperands(Inst, 1);
unsigned i = 2;
std::map<enum AMDGPUOperand::ImmTy, unsigned> OptionalIdx;
if (operandsHaveModifiers(Operands)) {
for (unsigned e = Operands.size(); i != e; ++i) {
AMDGPUOperand &Op = ((AMDGPUOperand &)*Operands[i]);
if (Op.isRegWithInputMods()) {
((AMDGPUOperand &)*Operands[i]).addRegWithInputModsOperands(Inst, 2);
continue;
}
OptionalIdx[Op.getImmTy()] = i;
}
unsigned ClampIdx = OptionalIdx[AMDGPUOperand::ImmTyClamp];
unsigned OModIdx = OptionalIdx[AMDGPUOperand::ImmTyOMod];
((AMDGPUOperand &)*Operands[ClampIdx]).addImmOperands(Inst, 1);
((AMDGPUOperand &)*Operands[OModIdx]).addImmOperands(Inst, 1);
} else {
for (unsigned e = Operands.size(); i != e; ++i)
((AMDGPUOperand &)*Operands[i]).addRegOrImmOperands(Inst, 1);
}
}
/// Force static initialization.
extern "C" void LLVMInitializeR600AsmParser() {
RegisterMCAsmParser<AMDGPUAsmParser> A(TheAMDGPUTarget);
RegisterMCAsmParser<AMDGPUAsmParser> B(TheGCNTarget);
}
#define GET_REGISTER_MATCHER
#define GET_MATCHER_IMPLEMENTATION
#include "AMDGPUGenAsmMatcher.inc"
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