1 //===-- MBlazeAsmParser.cpp - Parse MBlaze asm to MCInst instructions -----===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "MCTargetDesc/MBlazeBaseInfo.h"
11 #include "llvm/MC/MCParser/MCAsmLexer.h"
12 #include "llvm/MC/MCParser/MCAsmParser.h"
13 #include "llvm/MC/MCParser/MCParsedAsmOperand.h"
14 #include "llvm/MC/MCStreamer.h"
15 #include "llvm/MC/MCExpr.h"
16 #include "llvm/MC/MCInst.h"
17 #include "llvm/MC/MCTargetAsmParser.h"
18 #include "llvm/Support/SourceMgr.h"
19 #include "llvm/Support/TargetRegistry.h"
20 #include "llvm/Support/raw_ostream.h"
21 #include "llvm/ADT/SmallVector.h"
22 #include "llvm/ADT/Twine.h"
28 class MBlazeAsmParser : public MCTargetAsmParser {
31 MCAsmParser &getParser() const { return Parser; }
32 MCAsmLexer &getLexer() const { return Parser.getLexer(); }
34 void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
35 bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
37 MBlazeOperand *ParseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
38 MBlazeOperand *ParseRegister(unsigned &RegNo);
39 MBlazeOperand *ParseImmediate();
40 MBlazeOperand *ParseFsl();
41 MBlazeOperand* ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
43 virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
45 bool ParseDirectiveWord(unsigned Size, SMLoc L);
47 bool MatchAndEmitInstruction(SMLoc IDLoc,
48 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
51 /// @name Auto-generated Match Functions
54 #define GET_ASSEMBLER_HEADER
55 #include "MBlazeGenAsmMatcher.inc"
60 MBlazeAsmParser(MCSubtargetInfo &_STI, MCAsmParser &_Parser)
61 : MCTargetAsmParser(), Parser(_Parser) {}
63 virtual bool ParseInstruction(StringRef Name, SMLoc NameLoc,
64 SmallVectorImpl<MCParsedAsmOperand*> &Operands);
66 virtual bool ParseDirective(AsmToken DirectiveID);
69 /// MBlazeOperand - Instances of this class represent a parsed MBlaze machine
71 struct MBlazeOperand : public MCParsedAsmOperand {
80 SMLoc StartLoc, EndLoc;
107 MBlazeOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
109 MBlazeOperand(const MBlazeOperand &o) : MCParsedAsmOperand() {
111 StartLoc = o.StartLoc;
132 /// getStartLoc - Get the location of the first token of this operand.
133 SMLoc getStartLoc() const { return StartLoc; }
135 /// getEndLoc - Get the location of the last token of this operand.
136 SMLoc getEndLoc() const { return EndLoc; }
138 unsigned getReg() const {
139 assert(Kind == Register && "Invalid access!");
143 const MCExpr *getImm() const {
144 assert(Kind == Immediate && "Invalid access!");
148 const MCExpr *getFslImm() const {
149 assert(Kind == Fsl && "Invalid access!");
153 unsigned getMemBase() const {
154 assert(Kind == Memory && "Invalid access!");
158 const MCExpr* getMemOff() const {
159 assert(Kind == Memory && "Invalid access!");
163 unsigned getMemOffReg() const {
164 assert(Kind == Memory && "Invalid access!");
168 bool isToken() const { return Kind == Token; }
169 bool isImm() const { return Kind == Immediate; }
170 bool isMem() const { return Kind == Memory; }
171 bool isFsl() const { return Kind == Fsl; }
172 bool isReg() const { return Kind == Register; }
174 void addExpr(MCInst &Inst, const MCExpr *Expr) const {
175 // Add as immediates when possible. Null MCExpr = 0.
177 Inst.addOperand(MCOperand::CreateImm(0));
178 else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
179 Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
181 Inst.addOperand(MCOperand::CreateExpr(Expr));
184 void addRegOperands(MCInst &Inst, unsigned N) const {
185 assert(N == 1 && "Invalid number of operands!");
186 Inst.addOperand(MCOperand::CreateReg(getReg()));
189 void addImmOperands(MCInst &Inst, unsigned N) const {
190 assert(N == 1 && "Invalid number of operands!");
191 addExpr(Inst, getImm());
194 void addFslOperands(MCInst &Inst, unsigned N) const {
195 assert(N == 1 && "Invalid number of operands!");
196 addExpr(Inst, getFslImm());
199 void addMemOperands(MCInst &Inst, unsigned N) const {
200 assert(N == 2 && "Invalid number of operands!");
202 Inst.addOperand(MCOperand::CreateReg(getMemBase()));
204 unsigned RegOff = getMemOffReg();
206 Inst.addOperand(MCOperand::CreateReg(RegOff));
208 addExpr(Inst, getMemOff());
211 StringRef getToken() const {
212 assert(Kind == Token && "Invalid access!");
213 return StringRef(Tok.Data, Tok.Length);
216 virtual void print(raw_ostream &OS) const;
218 static MBlazeOperand *CreateToken(StringRef Str, SMLoc S) {
219 MBlazeOperand *Op = new MBlazeOperand(Token);
220 Op->Tok.Data = Str.data();
221 Op->Tok.Length = Str.size();
227 static MBlazeOperand *CreateReg(unsigned RegNum, SMLoc S, SMLoc E) {
228 MBlazeOperand *Op = new MBlazeOperand(Register);
229 Op->Reg.RegNum = RegNum;
235 static MBlazeOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
236 MBlazeOperand *Op = new MBlazeOperand(Immediate);
243 static MBlazeOperand *CreateFslImm(const MCExpr *Val, SMLoc S, SMLoc E) {
244 MBlazeOperand *Op = new MBlazeOperand(Fsl);
251 static MBlazeOperand *CreateMem(unsigned Base, const MCExpr *Off, SMLoc S,
253 MBlazeOperand *Op = new MBlazeOperand(Memory);
262 static MBlazeOperand *CreateMem(unsigned Base, unsigned Off, SMLoc S,
264 MBlazeOperand *Op = new MBlazeOperand(Memory);
266 Op->Mem.OffReg = Off;
274 } // end anonymous namespace.
276 void MBlazeOperand::print(raw_ostream &OS) const {
283 OS << getMBlazeRegisterNumbering(getReg()) << ">";
286 OS << "'" << getToken() << "'";
290 OS << getMBlazeRegisterNumbering(getMemBase());
293 unsigned RegOff = getMemOffReg();
295 OS << "R" << getMBlazeRegisterNumbering(RegOff);
302 getFslImm()->print(OS);
307 /// @name Auto-generated Match Functions
310 static unsigned MatchRegisterName(StringRef Name);
314 bool MBlazeAsmParser::
315 MatchAndEmitInstruction(SMLoc IDLoc,
316 SmallVectorImpl<MCParsedAsmOperand*> &Operands,
320 switch (MatchInstructionImpl(Operands, Inst, ErrorInfo,
321 /*matchingInlineAsm*/ false)) {
324 Out.EmitInstruction(Inst);
326 case Match_MissingFeature:
327 return Error(IDLoc, "instruction use requires an option to be enabled");
328 case Match_MnemonicFail:
329 return Error(IDLoc, "unrecognized instruction mnemonic");
330 case Match_InvalidOperand: {
331 SMLoc ErrorLoc = IDLoc;
332 if (ErrorInfo != ~0U) {
333 if (ErrorInfo >= Operands.size())
334 return Error(IDLoc, "too few operands for instruction");
336 ErrorLoc = ((MBlazeOperand*)Operands[ErrorInfo])->getStartLoc();
337 if (ErrorLoc == SMLoc()) ErrorLoc = IDLoc;
340 return Error(ErrorLoc, "invalid operand for instruction");
344 llvm_unreachable("Implement any new match types added!");
347 MBlazeOperand *MBlazeAsmParser::
348 ParseMemory(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
349 if (Operands.size() != 4)
352 MBlazeOperand &Base = *(MBlazeOperand*)Operands[2];
353 MBlazeOperand &Offset = *(MBlazeOperand*)Operands[3];
355 SMLoc S = Base.getStartLoc();
356 SMLoc O = Offset.getStartLoc();
357 SMLoc E = Offset.getEndLoc();
360 Error(S, "base address must be a register");
364 if (!Offset.isReg() && !Offset.isImm()) {
365 Error(O, "offset must be a register or immediate");
371 Op = MBlazeOperand::CreateMem(Base.getReg(), Offset.getReg(), S, E);
373 Op = MBlazeOperand::CreateMem(Base.getReg(), Offset.getImm(), S, E);
375 delete Operands.pop_back_val();
376 delete Operands.pop_back_val();
377 Operands.push_back(Op);
382 bool MBlazeAsmParser::ParseRegister(unsigned &RegNo,
383 SMLoc &StartLoc, SMLoc &EndLoc) {
384 return (ParseRegister(RegNo) == 0);
387 MBlazeOperand *MBlazeAsmParser::ParseRegister(unsigned &RegNo) {
388 SMLoc S = Parser.getTok().getLoc();
389 SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
391 switch (getLexer().getKind()) {
393 case AsmToken::Identifier:
394 RegNo = MatchRegisterName(getLexer().getTok().getIdentifier());
399 return MBlazeOperand::CreateReg(RegNo, S, E);
403 static unsigned MatchFslRegister(StringRef String) {
404 if (!String.startswith("rfsl"))
408 if (String.substr(4).getAsInteger(10,regNum))
414 MBlazeOperand *MBlazeAsmParser::ParseFsl() {
415 SMLoc S = Parser.getTok().getLoc();
416 SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
418 switch (getLexer().getKind()) {
420 case AsmToken::Identifier:
421 unsigned reg = MatchFslRegister(getLexer().getTok().getIdentifier());
426 const MCExpr *EVal = MCConstantExpr::Create(reg,getContext());
427 return MBlazeOperand::CreateFslImm(EVal,S,E);
431 MBlazeOperand *MBlazeAsmParser::ParseImmediate() {
432 SMLoc S = Parser.getTok().getLoc();
433 SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
436 switch (getLexer().getKind()) {
438 case AsmToken::LParen:
440 case AsmToken::Minus:
441 case AsmToken::Integer:
442 case AsmToken::Identifier:
443 if (getParser().ParseExpression(EVal))
446 return MBlazeOperand::CreateImm(EVal, S, E);
450 MBlazeOperand *MBlazeAsmParser::
451 ParseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
454 // Attempt to parse the next token as a register name
456 Op = ParseRegister(RegNo);
458 // Attempt to parse the next token as an FSL immediate
462 // Attempt to parse the next token as an immediate
464 Op = ParseImmediate();
466 // If the token could not be parsed then fail
468 Error(Parser.getTok().getLoc(), "unknown operand");
472 // Push the parsed operand into the list of operands
473 Operands.push_back(Op);
477 /// Parse an mblaze instruction mnemonic followed by its operands.
478 bool MBlazeAsmParser::
479 ParseInstruction(StringRef Name, SMLoc NameLoc,
480 SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
481 // The first operands is the token for the instruction name
482 size_t dotLoc = Name.find('.');
483 Operands.push_back(MBlazeOperand::CreateToken(Name.substr(0,dotLoc),NameLoc));
484 if (dotLoc < Name.size())
485 Operands.push_back(MBlazeOperand::CreateToken(Name.substr(dotLoc),NameLoc));
487 // If there are no more operands then finish
488 if (getLexer().is(AsmToken::EndOfStatement))
491 // Parse the first operand
492 if (!ParseOperand(Operands))
495 while (getLexer().isNot(AsmToken::EndOfStatement) &&
496 getLexer().is(AsmToken::Comma)) {
497 // Consume the comma token
500 // Parse the next operand
501 if (!ParseOperand(Operands))
505 // If the instruction requires a memory operand then we need to
506 // replace the last two operands (base+offset) with a single
508 if (Name.startswith("lw") || Name.startswith("sw") ||
509 Name.startswith("lh") || Name.startswith("sh") ||
510 Name.startswith("lb") || Name.startswith("sb"))
511 return (ParseMemory(Operands) == NULL);
516 /// ParseDirective parses the MBlaze specific directives
517 bool MBlazeAsmParser::ParseDirective(AsmToken DirectiveID) {
518 StringRef IDVal = DirectiveID.getIdentifier();
519 if (IDVal == ".word")
520 return ParseDirectiveWord(2, DirectiveID.getLoc());
524 /// ParseDirectiveWord
525 /// ::= .word [ expression (, expression)* ]
526 bool MBlazeAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
527 if (getLexer().isNot(AsmToken::EndOfStatement)) {
530 if (getParser().ParseExpression(Value))
533 getParser().getStreamer().EmitValue(Value, Size, 0 /*addrspace*/);
535 if (getLexer().is(AsmToken::EndOfStatement))
538 // FIXME: Improve diagnostic.
539 if (getLexer().isNot(AsmToken::Comma))
540 return Error(L, "unexpected token in directive");
549 extern "C" void LLVMInitializeMBlazeAsmLexer();
551 /// Force static initialization.
552 extern "C" void LLVMInitializeMBlazeAsmParser() {
553 RegisterMCAsmParser<MBlazeAsmParser> X(TheMBlazeTarget);
554 LLVMInitializeMBlazeAsmLexer();
557 #define GET_REGISTER_MATCHER
558 #define GET_MATCHER_IMPLEMENTATION
559 #include "MBlazeGenAsmMatcher.inc"