--- /dev/null
+//===-- SparcAsmParser.cpp - Parse Sparc assembly 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/SparcMCTargetDesc.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCInst.h"
+#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCTargetAsmParser.h"
+#include "llvm/Support/TargetRegistry.h"
+
+using namespace llvm;
+
+// The generated AsmMatcher SparcGenAsmMatcher uses "Sparc" as the target
+// namespace. But SPARC backend uses "SP" as its namespace.
+namespace llvm {
+ namespace Sparc {
+ using namespace SP;
+ }
+}
+
+namespace {
+class SparcAsmParser : public MCTargetAsmParser {
+
+ MCSubtargetInfo &STI;
+ MCAsmParser &Parser;
+
+ /// @name Auto-generated Match Functions
+ /// {
+
+#define GET_ASSEMBLER_HEADER
+#include "SparcGenAsmMatcher.inc"
+
+ /// }
+
+ // public interface of the MCTargetAsmParser.
+ bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ MCStreamer &Out, unsigned &ErrorInfo,
+ bool MatchingInlineAsm);
+ bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
+ bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
+ SMLoc NameLoc,
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands);
+ bool ParseDirective(AsmToken DirectiveID);
+
+
+ // Custom parse functions for Sparc specific operands.
+ OperandMatchResultTy
+ parseMEMrrOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
+ OperandMatchResultTy
+ parseMEMriOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands);
+
+ OperandMatchResultTy
+ parseMEMOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ int ImmOffsetOrReg);
+
+ OperandMatchResultTy
+ parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ StringRef Name);
+
+ // returns true if Tok is matched to a register and returns register in RegNo.
+ bool matchRegisterName(const AsmToken &Tok, unsigned &RegNo, bool isDFP,
+ bool isQFP);
+
+public:
+ SparcAsmParser(MCSubtargetInfo &sti, MCAsmParser &parser,
+ const MCInstrInfo &MII)
+ : MCTargetAsmParser(), STI(sti), Parser(parser) {
+ // Initialize the set of available features.
+ setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
+ }
+
+};
+
+ static unsigned IntRegs[32] = {
+ Sparc::G0, Sparc::G1, Sparc::G2, Sparc::G3,
+ Sparc::G4, Sparc::G5, Sparc::G6, Sparc::G7,
+ Sparc::O0, Sparc::O1, Sparc::O2, Sparc::O3,
+ Sparc::O4, Sparc::O5, Sparc::O6, Sparc::O7,
+ Sparc::L0, Sparc::L1, Sparc::L2, Sparc::L3,
+ Sparc::L4, Sparc::L5, Sparc::L6, Sparc::L7,
+ Sparc::I0, Sparc::I1, Sparc::I2, Sparc::I3,
+ Sparc::I4, Sparc::I5, Sparc::I6, Sparc::I7 };
+
+ static unsigned FloatRegs[32] = {
+ Sparc::F0, Sparc::F1, Sparc::F2, Sparc::F3,
+ Sparc::F4, Sparc::F5, Sparc::F6, Sparc::F7,
+ Sparc::F8, Sparc::F9, Sparc::F10, Sparc::F11,
+ Sparc::F12, Sparc::F13, Sparc::F14, Sparc::F15,
+ Sparc::F16, Sparc::F17, Sparc::F18, Sparc::F19,
+ Sparc::F20, Sparc::F21, Sparc::F22, Sparc::F23,
+ Sparc::F24, Sparc::F25, Sparc::F26, Sparc::F27,
+ Sparc::F28, Sparc::F29, Sparc::F30, Sparc::F31 };
+
+ static unsigned DoubleRegs[32] = {
+ Sparc::D0, Sparc::D1, Sparc::D2, Sparc::D3,
+ Sparc::D4, Sparc::D5, Sparc::D6, Sparc::D7,
+ Sparc::D8, Sparc::D7, Sparc::D8, Sparc::D9,
+ Sparc::D12, Sparc::D13, Sparc::D14, Sparc::D15,
+ Sparc::D16, Sparc::D17, Sparc::D18, Sparc::D19,
+ Sparc::D20, Sparc::D21, Sparc::D22, Sparc::D23,
+ Sparc::D24, Sparc::D25, Sparc::D26, Sparc::D27,
+ Sparc::D28, Sparc::D29, Sparc::D30, Sparc::D31 };
+
+ static unsigned QuadFPRegs[32] = {
+ Sparc::Q0, Sparc::Q1, Sparc::Q2, Sparc::Q3,
+ Sparc::Q4, Sparc::Q5, Sparc::Q6, Sparc::Q7,
+ Sparc::Q8, Sparc::Q7, Sparc::Q8, Sparc::Q9,
+ Sparc::Q12, Sparc::Q13, Sparc::Q14, Sparc::Q15 };
+
+
+/// SparcOperand - Instances of this class represent a parsed Sparc machine
+/// instruction.
+class SparcOperand : public MCParsedAsmOperand {
+public:
+ enum RegisterKind {
+ rk_None,
+ rk_IntReg,
+ rk_FloatReg,
+ rk_DoubleReg,
+ rk_QuadReg,
+ rk_CCReg,
+ rk_Y
+ };
+private:
+ enum KindTy {
+ k_Token,
+ k_Register,
+ k_Immediate,
+ k_MemoryReg,
+ k_MemoryImm
+ } Kind;
+
+ SMLoc StartLoc, EndLoc;
+
+ SparcOperand(KindTy K) : MCParsedAsmOperand(), Kind(K) {}
+
+ struct Token {
+ const char *Data;
+ unsigned Length;
+ };
+
+ struct RegOp {
+ unsigned RegNum;
+ RegisterKind Kind;
+ };
+
+ struct ImmOp {
+ const MCExpr *Val;
+ };
+
+ struct MemOp {
+ unsigned Base;
+ unsigned OffsetReg;
+ const MCExpr *Off;
+ };
+
+ union {
+ struct Token Tok;
+ struct RegOp Reg;
+ struct ImmOp Imm;
+ struct MemOp Mem;
+ };
+public:
+ bool isToken() const { return Kind == k_Token; }
+ bool isReg() const { return Kind == k_Register; }
+ bool isImm() const { return Kind == k_Immediate; }
+ bool isMem() const { return isMEMrr() || isMEMri(); }
+ bool isMEMrr() const { return Kind == k_MemoryReg; }
+ bool isMEMri() const { return Kind == k_MemoryImm; }
+
+ StringRef getToken() const {
+ assert(Kind == k_Token && "Invalid access!");
+ return StringRef(Tok.Data, Tok.Length);
+ }
+
+ unsigned getReg() const {
+ assert((Kind == k_Register) && "Invalid access!");
+ return Reg.RegNum;
+ }
+
+ const MCExpr *getImm() const {
+ assert((Kind == k_Immediate) && "Invalid access!");
+ return Imm.Val;
+ }
+
+ unsigned getMemBase() const {
+ assert((Kind == k_MemoryReg || Kind == k_MemoryImm) && "Invalid access!");
+ return Mem.Base;
+ }
+
+ unsigned getMemOffsetReg() const {
+ assert((Kind == k_MemoryReg) && "Invalid access!");
+ return Mem.OffsetReg;
+ }
+
+ const MCExpr *getMemOff() const {
+ assert((Kind == k_MemoryImm) && "Invalid access!");
+ return Mem.Off;
+ }
+
+ /// getStartLoc - Get the location of the first token of this operand.
+ SMLoc getStartLoc() const {
+ return StartLoc;
+ }
+ /// getEndLoc - Get the location of the last token of this operand.
+ SMLoc getEndLoc() const {
+ return EndLoc;
+ }
+
+ virtual void print(raw_ostream &OS) const {
+ switch (Kind) {
+ case k_Token: OS << "Token: " << getToken() << "\n"; break;
+ case k_Register: OS << "Reg: #" << getReg() << "\n"; break;
+ case k_Immediate: OS << "Imm: " << getImm() << "\n"; break;
+ case k_MemoryReg: OS << "Mem: " << getMemBase() << "+"
+ << getMemOffsetReg() << "\n"; break;
+ case k_MemoryImm: assert(getMemOff() != 0);
+ OS << "Mem: " << getMemBase()
+ << "+" << *getMemOff()
+ << "\n"; break;
+ }
+ }
+
+ void addRegOperands(MCInst &Inst, unsigned N) const {
+ assert(N == 1 && "Invalid number of operands!");
+ Inst.addOperand(MCOperand::CreateReg(getReg()));
+ }
+
+ void addImmOperands(MCInst &Inst, unsigned N) const {
+ assert(N == 1 && "Invalid number of operands!");
+ const MCExpr *Expr = getImm();
+ addExpr(Inst, Expr);
+ }
+
+ void addExpr(MCInst &Inst, const MCExpr *Expr) const{
+ // Add as immediate when possible. Null MCExpr = 0.
+ if (Expr == 0)
+ Inst.addOperand(MCOperand::CreateImm(0));
+ else if (const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr))
+ Inst.addOperand(MCOperand::CreateImm(CE->getValue()));
+ else
+ Inst.addOperand(MCOperand::CreateExpr(Expr));
+ }
+
+ void addMEMrrOperands(MCInst &Inst, unsigned N) const {
+ assert(N == 2 && "Invalid number of operands!");
+
+ Inst.addOperand(MCOperand::CreateReg(getMemBase()));
+
+ assert(getMemOffsetReg() != 0 && "Invalid offset");
+ Inst.addOperand(MCOperand::CreateReg(getMemOffsetReg()));
+ }
+
+ void addMEMriOperands(MCInst &Inst, unsigned N) const {
+ assert(N == 2 && "Invalid number of operands!");
+
+ Inst.addOperand(MCOperand::CreateReg(getMemBase()));
+
+ const MCExpr *Expr = getMemOff();
+ addExpr(Inst, Expr);
+ }
+
+ static SparcOperand *CreateToken(StringRef Str, SMLoc S) {
+ SparcOperand *Op = new SparcOperand(k_Token);
+ Op->Tok.Data = Str.data();
+ Op->Tok.Length = Str.size();
+ Op->StartLoc = S;
+ Op->EndLoc = S;
+ return Op;
+ }
+
+ static SparcOperand *CreateReg(unsigned RegNum,
+ SparcOperand::RegisterKind Kind,
+ SMLoc S, SMLoc E) {
+ SparcOperand *Op = new SparcOperand(k_Register);
+ Op->Reg.RegNum = RegNum;
+ Op->Reg.Kind = Kind;
+ Op->StartLoc = S;
+ Op->EndLoc = E;
+ return Op;
+ }
+
+ static SparcOperand *CreateImm(const MCExpr *Val, SMLoc S, SMLoc E) {
+ SparcOperand *Op = new SparcOperand(k_Immediate);
+ Op->Imm.Val = Val;
+ Op->StartLoc = S;
+ Op->EndLoc = E;
+ return Op;
+ }
+
+
+};
+
+} // end namespace
+
+bool SparcAsmParser::
+MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ MCStreamer &Out, unsigned &ErrorInfo,
+ bool MatchingInlineAsm) {
+ MCInst Inst;
+ SmallVector<MCInst, 8> Instructions;
+ unsigned MatchResult = MatchInstructionImpl(Operands, Inst, ErrorInfo,
+ MatchingInlineAsm);
+ switch (MatchResult) {
+ default:
+ break;
+
+ case Match_Success: {
+ Inst.setLoc(IDLoc);
+ Out.EmitInstruction(Inst);
+ return false;
+ }
+
+ case Match_MissingFeature:
+ return Error(IDLoc,
+ "instruction requires a CPU feature not currently enabled");
+
+ case Match_InvalidOperand: {
+ SMLoc ErrorLoc = IDLoc;
+ if (ErrorInfo != ~0U) {
+ if (ErrorInfo >= Operands.size())
+ return Error(IDLoc, "too few operands for instruction");
+
+ ErrorLoc = ((SparcOperand*) Operands[ErrorInfo])->getStartLoc();
+ if (ErrorLoc == SMLoc())
+ ErrorLoc = IDLoc;
+ }
+
+ return Error(ErrorLoc, "invalid operand for instruction");
+ }
+ case Match_MnemonicFail:
+ return Error(IDLoc, "invalid instruction");
+ }
+ return true;
+}
+
+bool SparcAsmParser::
+ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc)
+{
+ const AsmToken &Tok = Parser.getTok();
+ StartLoc = Tok.getLoc();
+ EndLoc = Tok.getEndLoc();
+ RegNo = 0;
+ if (getLexer().getKind() != AsmToken::Percent)
+ return false;
+ Parser.Lex();
+ if (matchRegisterName(Tok, RegNo, false, false)) {
+ Parser.Lex();
+ return false;
+ }
+
+ return Error(StartLoc, "invalid register name");
+}
+
+bool SparcAsmParser::
+ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
+ SMLoc NameLoc,
+ SmallVectorImpl<MCParsedAsmOperand*> &Operands)
+{
+ // Check if we have valid mnemonic.
+ if (!mnemonicIsValid(Name, 0)) {
+ Parser.eatToEndOfStatement();
+ return Error(NameLoc, "Unknown instruction");
+ }
+ // First operand in MCInst is instruction mnemonic.
+ Operands.push_back(SparcOperand::CreateToken(Name, NameLoc));
+
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ // Read the first operand.
+ if (parseOperand(Operands, Name) != MatchOperand_Success) {
+ SMLoc Loc = getLexer().getLoc();
+ Parser.eatToEndOfStatement();
+ return Error(Loc, "unexpected token");
+ }
+
+ while (getLexer().is(AsmToken::Comma)) {
+ Parser.Lex(); // Eat the comma.
+ // Parse and remember the operand.
+ if (parseOperand(Operands, Name) != MatchOperand_Success) {
+ SMLoc Loc = getLexer().getLoc();
+ Parser.eatToEndOfStatement();
+ return Error(Loc, "unexpected token");
+ }
+ }
+ }
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ SMLoc Loc = getLexer().getLoc();
+ Parser.eatToEndOfStatement();
+ return Error(Loc, "unexpected token");
+ }
+ Parser.Lex(); // Consume the EndOfStatement.
+ return false;
+}
+
+bool SparcAsmParser::
+ParseDirective(AsmToken DirectiveID)
+{
+ // Ignore all directives for now.
+ Parser.eatToEndOfStatement();
+ return false;
+}
+
+SparcAsmParser::OperandMatchResultTy SparcAsmParser::
+parseMEMOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ int ImmOffsetOrReg)
+{
+ // FIXME: Implement memory operand parsing here.
+ return MatchOperand_NoMatch;
+}
+
+SparcAsmParser::OperandMatchResultTy SparcAsmParser::
+parseMEMrrOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands)
+{
+ return parseMEMOperand(Operands, 2);
+}
+
+SparcAsmParser::OperandMatchResultTy SparcAsmParser::
+parseMEMriOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands)
+{
+ return parseMEMOperand(Operands, 1);
+}
+
+SparcAsmParser::OperandMatchResultTy SparcAsmParser::
+parseOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands,
+ StringRef Mnemonic)
+{
+ OperandMatchResultTy ResTy = MatchOperandParserImpl(Operands, Mnemonic);
+ if (ResTy == MatchOperand_Success)
+ return ResTy;
+ // If there wasn't a custom match, try the generic matcher below. Otherwise,
+ // there was a match, but an error occurred, in which case, just return that
+ // the operand parsing failed.
+ if (ResTy == MatchOperand_ParseFail)
+ return ResTy;
+
+ SMLoc S = Parser.getTok().getLoc();
+ SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
+ const MCExpr *EVal;
+ SparcOperand *Op;
+ switch (getLexer().getKind()) {
+ case AsmToken::Percent:
+ Parser.Lex(); // Eat the '%'.
+ unsigned RegNo;
+ if (matchRegisterName(Parser.getTok(), RegNo, false, false)) {
+ Parser.Lex(); // Eat the identifier token.
+ Op = SparcOperand::CreateReg(RegNo, SparcOperand::rk_None, S, E);
+ break;
+ }
+ // FIXME: Handle modifiers like %hi, %lo etc.,
+ return MatchOperand_ParseFail;
+
+ case AsmToken::Minus:
+ case AsmToken::Integer:
+ if (getParser().parseExpression(EVal))
+ return MatchOperand_ParseFail;
+
+ Op = SparcOperand::CreateImm(EVal, S, E);
+ break;
+
+ case AsmToken::Identifier: {
+ StringRef Identifier;
+ if (getParser().parseIdentifier(Identifier))
+ return MatchOperand_ParseFail;
+ SMLoc E = SMLoc::getFromPointer(Parser.getTok().getLoc().getPointer() - 1);
+ MCSymbol *Sym = getContext().GetOrCreateSymbol(Identifier);
+
+ // Otherwise create a symbol reference.
+ const MCExpr *Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
+ getContext());
+
+ Op = SparcOperand::CreateImm(Res, S, E);
+ break;
+ }
+
+ case AsmToken::LBrac: // handle [
+ return parseMEMOperand(Operands, 0);
+
+ default:
+ return MatchOperand_ParseFail;
+ }
+ // Push the parsed operand into the list of operands
+ Operands.push_back(Op);
+ return MatchOperand_Success;
+}
+
+bool SparcAsmParser::matchRegisterName(const AsmToken &Tok,
+ unsigned &RegNo,
+ bool isDFP,
+ bool isQFP)
+{
+ int64_t intVal = 0;
+ RegNo = 0;
+ if (Tok.is(AsmToken::Identifier)) {
+ StringRef name = Tok.getString();
+
+ // %fp
+ if (name.equals("fp")) {
+ RegNo = Sparc::I6;
+ return true;
+ }
+ // %sp
+ if (name.equals("sp")) {
+ RegNo = Sparc::O6;
+ return true;
+ }
+
+ if (name.equals("y")) {
+ RegNo = Sparc::Y;
+ return true;
+ }
+
+ if (name.equals("icc")) {
+ RegNo = Sparc::ICC;
+ return true;
+ }
+
+ if (name.equals("xcc")) {
+ // FIXME:: check 64bit.
+ RegNo = Sparc::ICC;
+ return true;
+ }
+
+ // %fcc0 - %fcc3
+ if (name.substr(0, 3).equals_lower("fcc")
+ && !name.substr(3).getAsInteger(10, intVal)
+ && intVal < 4) {
+ // FIXME: check 64bit and handle %fcc1 - %fcc3
+ RegNo = Sparc::FCC;
+ return true;
+ }
+
+ // %g0 - %g7
+ if (name.substr(0, 1).equals_lower("g")
+ && !name.substr(1).getAsInteger(10, intVal)
+ && intVal < 8) {
+ RegNo = IntRegs[intVal];
+ return true;
+ }
+ // %o0 - %o7
+ if (name.substr(0, 1).equals_lower("o")
+ && !name.substr(1).getAsInteger(10, intVal)
+ && intVal < 8) {
+ RegNo = IntRegs[8 + intVal];
+ return true;
+ }
+ if (name.substr(0, 1).equals_lower("l")
+ && !name.substr(1).getAsInteger(10, intVal)
+ && intVal < 8) {
+ RegNo = IntRegs[16 + intVal];
+ return true;
+ }
+ if (name.substr(0, 1).equals_lower("i")
+ && !name.substr(1).getAsInteger(10, intVal)
+ && intVal < 8) {
+ RegNo = IntRegs[24 + intVal];
+ return true;
+ }
+ // %f0 - %f31
+ if (name.substr(0, 1).equals_lower("f")
+ && !name.substr(1, 2).getAsInteger(10, intVal) && intVal < 32) {
+ if (isDFP && (intVal%2 == 0)) {
+ RegNo = DoubleRegs[intVal/2];
+ } else if (isQFP && (intVal%4 == 0)) {
+ RegNo = QuadFPRegs[intVal/4];
+ } else {
+ RegNo = FloatRegs[intVal];
+ }
+ return true;
+ }
+ // %f32 - %f62
+ if (name.substr(0, 1).equals_lower("f")
+ && !name.substr(1, 2).getAsInteger(10, intVal)
+ && intVal >= 32 && intVal <= 62 && (intVal % 2 == 0)) {
+ if (isDFP) {
+ RegNo = DoubleRegs[16 + intVal/2];
+ } else if (isQFP && (intVal % 4 == 0)) {
+ RegNo = QuadFPRegs[8 + intVal/4];
+ } else {
+ return false;
+ }
+ return true;
+ }
+
+ // %r0 - %r31
+ if (name.substr(0, 1).equals_lower("r")
+ && !name.substr(1, 2).getAsInteger(10, intVal) && intVal < 31) {
+ RegNo = IntRegs[intVal];
+ return true;
+ }
+ }
+ return false;
+}
+
+
+
+extern "C" void LLVMInitializeSparcAsmParser() {
+ RegisterMCAsmParser<SparcAsmParser> A(TheSparcTarget);
+ RegisterMCAsmParser<SparcAsmParser> B(TheSparcV9Target);
+}
+
+#define GET_REGISTER_MATCHER
+#define GET_MATCHER_IMPLEMENTATION
+#include "SparcGenAsmMatcher.inc"
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