//===----------------------------------------------------------------------===//
#include "MCTargetDesc/X86BaseInfo.h"
-#include "llvm/MC/MCTargetAsmParser.h"
-#include "llvm/MC/MCStreamer.h"
+#include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCExpr.h"
-#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCRegisterInfo.h"
-#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
#include "llvm/MC/MCParser/MCAsmParser.h"
#include "llvm/MC/MCParser/MCParsedAsmOperand.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCRegisterInfo.h"
+#include "llvm/MC/MCStreamer.h"
+#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/Support/SourceMgr.h"
#include "llvm/Support/TargetRegistry.h"
#include "llvm/Support/raw_ostream.h"
class X86AsmParser : public MCTargetAsmParser {
MCSubtargetInfo &STI;
MCAsmParser &Parser;
+ ParseInstructionInfo *InstInfo;
private:
MCAsmParser &getParser() const { return Parser; }
X86Operand *ParseOperand();
X86Operand *ParseATTOperand();
X86Operand *ParseIntelOperand();
+ X86Operand *ParseIntelOffsetOfOperator(SMLoc StartLoc);
+ X86Operand *ParseIntelTypeOperator(SMLoc StartLoc);
X86Operand *ParseIntelMemOperand(unsigned SegReg, SMLoc StartLoc);
X86Operand *ParseIntelBracExpression(unsigned SegReg, unsigned Size);
X86Operand *ParseMemOperand(unsigned SegReg, SMLoc StartLoc);
+ bool ParseIntelDotOperator(const MCExpr *Disp, const MCExpr **NewDisp,
+ SmallString<64> &Err);
+
bool ParseDirectiveWord(unsigned Size, SMLoc L);
bool ParseDirectiveCode(StringRef IDVal, SMLoc L);
public:
X86AsmParser(MCSubtargetInfo &sti, MCAsmParser &parser)
- : MCTargetAsmParser(), STI(sti), Parser(parser) {
+ : MCTargetAsmParser(), STI(sti), Parser(parser), InstInfo(0) {
// Initialize the set of available features.
setAvailableFeatures(ComputeAvailableFeatures(STI.getFeatureBits()));
}
virtual bool ParseRegister(unsigned &RegNo, SMLoc &StartLoc, SMLoc &EndLoc);
- virtual bool ParseInstruction(StringRef Name, SMLoc NameLoc,
+ virtual bool ParseInstruction(ParseInstructionInfo &Info, StringRef Name,
+ SMLoc NameLoc,
SmallVectorImpl<MCParsedAsmOperand*> &Operands);
virtual bool ParseDirective(AsmToken DirectiveID);
} Kind;
SMLoc StartLoc, EndLoc;
+ SMLoc OffsetOfLoc;
union {
struct {
struct {
const MCExpr *Val;
+ bool NeedAsmRewrite;
} Imm;
struct {
unsigned IndexReg;
unsigned Scale;
unsigned Size;
- bool OffsetOf;
bool NeedSizeDir;
} Mem;
};
/// getLocRange - Get the range between the first and last token of this
/// operand.
SMRange getLocRange() const { return SMRange(StartLoc, EndLoc); }
+ /// getOffsetOfLoc - Get the location of the offset operator.
+ SMLoc getOffsetOfLoc() const { return OffsetOfLoc; }
virtual void print(raw_ostream &OS) const {}
return Imm.Val;
}
+ bool needAsmRewrite() const {
+ assert(Kind == Immediate && "Invalid access!");
+ return Imm.NeedAsmRewrite;
+ }
+
const MCExpr *getMemDisp() const {
assert(Kind == Memory && "Invalid access!");
return Mem.Disp;
return Mem.Size;
}
+ bool isOffsetOf() const {
+ return OffsetOfLoc.getPointer();
+ }
+
bool needSizeDirective() const {
assert(Kind == Memory && "Invalid access!");
return Mem.NeedSizeDir;
return Res;
}
- static X86Operand *CreateReg(unsigned RegNo, SMLoc StartLoc, SMLoc EndLoc) {
+ static X86Operand *CreateReg(unsigned RegNo, SMLoc StartLoc, SMLoc EndLoc,
+ SMLoc OffsetOfLoc = SMLoc()) {
X86Operand *Res = new X86Operand(Register, StartLoc, EndLoc);
Res->Reg.RegNo = RegNo;
+ Res->OffsetOfLoc = OffsetOfLoc;
return Res;
}
- static X86Operand *CreateImm(const MCExpr *Val, SMLoc StartLoc, SMLoc EndLoc){
+ static X86Operand *CreateImm(const MCExpr *Val, SMLoc StartLoc, SMLoc EndLoc,
+ bool NeedRewrite = true){
X86Operand *Res = new X86Operand(Immediate, StartLoc, EndLoc);
Res->Imm.Val = Val;
+ Res->Imm.NeedAsmRewrite = NeedRewrite;
return Res;
}
/// Create an absolute memory operand.
- static X86Operand *CreateMem(const MCExpr *Disp, SMLoc StartLoc,
- SMLoc EndLoc, unsigned Size = 0,
- bool OffsetOf = false, bool NeedSizeDir = false){
+ static X86Operand *CreateMem(const MCExpr *Disp, SMLoc StartLoc, SMLoc EndLoc,
+ unsigned Size = 0, bool NeedSizeDir = false){
X86Operand *Res = new X86Operand(Memory, StartLoc, EndLoc);
Res->Mem.SegReg = 0;
Res->Mem.Disp = Disp;
Res->Mem.IndexReg = 0;
Res->Mem.Scale = 1;
Res->Mem.Size = Size;
- Res->Mem.OffsetOf = OffsetOf;
Res->Mem.NeedSizeDir = NeedSizeDir;
return Res;
}
static X86Operand *CreateMem(unsigned SegReg, const MCExpr *Disp,
unsigned BaseReg, unsigned IndexReg,
unsigned Scale, SMLoc StartLoc, SMLoc EndLoc,
- unsigned Size = 0, bool OffsetOf = false,
- bool NeedSizeDir = false) {
+ unsigned Size = 0, bool NeedSizeDir = false) {
// We should never just have a displacement, that should be parsed as an
// absolute memory operand.
assert((SegReg || BaseReg || IndexReg) && "Invalid memory operand!");
Res->Mem.IndexReg = IndexReg;
Res->Mem.Scale = Scale;
Res->Mem.Size = Size;
- Res->Mem.OffsetOf = OffsetOf;
Res->Mem.NeedSizeDir = NeedSizeDir;
return Res;
}
X86Operand *X86AsmParser::ParseIntelBracExpression(unsigned SegReg,
unsigned Size) {
unsigned BaseReg = 0, IndexReg = 0, Scale = 1;
- SMLoc Start = Parser.getTok().getLoc(), End;
+ const AsmToken &Tok = Parser.getTok();
+ SMLoc Start = Tok.getLoc(), End;
- const MCExpr *Disp = MCConstantExpr::Create(0, getParser().getContext());
+ const MCExpr *Disp = MCConstantExpr::Create(0, getContext());
// Parse [ BaseReg + Scale*IndexReg + Disp ] or [ symbol ]
// Eat '['
if (getLexer().isNot(AsmToken::RBrac))
return ErrorOperand(Start, "Expected ']' token!");
Parser.Lex();
+ End = Tok.getLoc();
return X86Operand::CreateMem(Disp, Start, End, Size);
}
} else if (getLexer().is(AsmToken::Integer)) {
- int64_t Val = Parser.getTok().getIntVal();
+ int64_t Val = Tok.getIntVal();
Parser.Lex();
- SMLoc Loc = Parser.getTok().getLoc();
+ SMLoc Loc = Tok.getLoc();
if (getLexer().is(AsmToken::RBrac)) {
// Handle '[' number ']'
Parser.Lex();
+ End = Tok.getLoc();
const MCExpr *Disp = MCConstantExpr::Create(Val, getContext());
if (SegReg)
return X86Operand::CreateMem(SegReg, Disp, 0, 0, Scale,
} else if (getLexer().is(AsmToken::Star)) {
// Handle '[' Scale*IndexReg ']'
Parser.Lex();
- SMLoc IdxRegLoc = Parser.getTok().getLoc();
+ SMLoc IdxRegLoc = Tok.getLoc();
if (ParseRegister(IndexReg, IdxRegLoc, End))
return ErrorOperand(IdxRegLoc, "Expected register");
Scale = Val;
return ErrorOperand(Loc, "Unexpected token");
}
- if (getLexer().is(AsmToken::Plus) || getLexer().is(AsmToken::Minus)) {
- bool isPlus = getLexer().is(AsmToken::Plus);
+ // Parse ][ as a plus.
+ bool ExpectRBrac = true;
+ if (getLexer().is(AsmToken::RBrac)) {
+ ExpectRBrac = false;
Parser.Lex();
- SMLoc PlusLoc = Parser.getTok().getLoc();
+ End = Tok.getLoc();
+ }
+
+ if (getLexer().is(AsmToken::Plus) || getLexer().is(AsmToken::Minus) ||
+ getLexer().is(AsmToken::LBrac)) {
+ ExpectRBrac = true;
+ bool isPlus = getLexer().is(AsmToken::Plus) ||
+ getLexer().is(AsmToken::LBrac);
+ Parser.Lex();
+ SMLoc PlusLoc = Tok.getLoc();
if (getLexer().is(AsmToken::Integer)) {
- int64_t Val = Parser.getTok().getIntVal();
+ int64_t Val = Tok.getIntVal();
Parser.Lex();
if (getLexer().is(AsmToken::Star)) {
Parser.Lex();
- SMLoc IdxRegLoc = Parser.getTok().getLoc();
+ SMLoc IdxRegLoc = Tok.getLoc();
if (ParseRegister(IndexReg, IdxRegLoc, End))
return ErrorOperand(IdxRegLoc, "Expected register");
Scale = Val;
return ErrorOperand(PlusLoc, "unexpected token after +");
} else if (getLexer().is(AsmToken::Identifier)) {
// This could be an index register or a displacement expression.
- End = Parser.getTok().getLoc();
+ End = Tok.getLoc();
if (!IndexReg)
ParseRegister(IndexReg, Start, End);
else if (getParser().ParseExpression(Disp, End)) return 0;
}
}
+
+ // Parse ][ as a plus.
+ if (getLexer().is(AsmToken::RBrac)) {
+ ExpectRBrac = false;
+ Parser.Lex();
+ End = Tok.getLoc();
+ if (getLexer().is(AsmToken::LBrac)) {
+ ExpectRBrac = true;
+ Parser.Lex();
+ if (getParser().ParseExpression(Disp, End))
+ return 0;
+ }
+ } else if (ExpectRBrac) {
+ if (getParser().ParseExpression(Disp, End))
+ return 0;
+ }
- if (getLexer().isNot(AsmToken::RBrac))
- if (getParser().ParseExpression(Disp, End)) return 0;
+ if (ExpectRBrac) {
+ if (getLexer().isNot(AsmToken::RBrac))
+ return ErrorOperand(End, "expected ']' token!");
+ Parser.Lex();
+ End = Tok.getLoc();
+ }
- End = Parser.getTok().getLoc();
- if (getLexer().isNot(AsmToken::RBrac))
- return ErrorOperand(End, "expected ']' token!");
- Parser.Lex();
- End = Parser.getTok().getLoc();
+ // Parse the dot operator (e.g., [ebx].foo.bar).
+ if (Tok.getString().startswith(".")) {
+ SmallString<64> Err;
+ const MCExpr *NewDisp;
+ if (ParseIntelDotOperator(Disp, &NewDisp, Err))
+ return ErrorOperand(Tok.getLoc(), Err);
+
+ Parser.Lex(); // Eat the field.
+ Disp = NewDisp;
+ }
+
+ End = Tok.getLoc();
// handle [-42]
if (!BaseReg && !IndexReg)
Parser.Lex();
}
- // Parse the 'offset' operator. This operator is used to specify the
- // location rather then the content of a variable.
- bool OffsetOf = false;
- if(isParsingInlineAsm() && (Tok.getString() == "offset" ||
- Tok.getString() == "OFFSET")) {
- OffsetOf = true;
- Parser.Lex(); // Eat offset.
- }
-
- if (getLexer().is(AsmToken::LBrac)) {
- assert (!OffsetOf && "Unexpected offset operator!");
+ if (getLexer().is(AsmToken::LBrac))
return ParseIntelBracExpression(SegReg, Size);
- }
if (!ParseRegister(SegReg, Start, End)) {
- assert (!OffsetOf && "Unexpected offset operator!");
// Handel SegReg : [ ... ]
if (getLexer().isNot(AsmToken::Colon))
return ErrorOperand(Start, "Expected ':' token!");
NeedSizeDir = Size > 0;
}
}
- return X86Operand::CreateMem(Disp, Start, End, Size, OffsetOf, NeedSizeDir);
+ if (!isParsingInlineAsm())
+ return X86Operand::CreateMem(Disp, Start, End, Size);
+ else
+ // When parsing inline assembly we set the base register to a non-zero value
+ // as we don't know the actual value at this time. This is necessary to
+ // get the matching correct in some cases.
+ return X86Operand::CreateMem(/*SegReg*/0, Disp, /*BaseReg*/1, /*IndexReg*/0,
+ /*Scale*/1, Start, End, Size, NeedSizeDir);
+}
+
+/// Parse the '.' operator.
+bool X86AsmParser::ParseIntelDotOperator(const MCExpr *Disp,
+ const MCExpr **NewDisp,
+ SmallString<64> &Err) {
+ AsmToken Tok = *&Parser.getTok();
+ uint64_t OrigDispVal, DotDispVal;
+
+ // FIXME: Handle non-constant expressions.
+ if (const MCConstantExpr *OrigDisp = dyn_cast<MCConstantExpr>(Disp)) {
+ OrigDispVal = OrigDisp->getValue();
+ } else {
+ Err = "Non-constant offsets are not supported!";
+ return true;
+ }
+
+ // Drop the '.'.
+ StringRef DotDispStr = Tok.getString().drop_front(1);
+
+ // .Imm gets lexed as a real.
+ if (Tok.is(AsmToken::Real)) {
+ APInt DotDisp;
+ DotDispStr.getAsInteger(10, DotDisp);
+ DotDispVal = DotDisp.getZExtValue();
+ } else if (Tok.is(AsmToken::Identifier)) {
+ // We should only see an identifier when parsing the original inline asm.
+ // The front-end should rewrite this in terms of immediates.
+ assert (isParsingInlineAsm() && "Unexpected field name!");
+
+ unsigned DotDisp;
+ std::pair<StringRef, StringRef> BaseMember = DotDispStr.split('.');
+ if (SemaCallback->LookupInlineAsmField(BaseMember.first, BaseMember.second,
+ DotDisp)) {
+ Err = "Unable to lookup field reference!";
+ return true;
+ }
+ DotDispVal = DotDisp;
+ } else {
+ Err = "Unexpected token type!";
+ return true;
+ }
+
+ if (isParsingInlineAsm() && Tok.is(AsmToken::Identifier)) {
+ SMLoc Loc = SMLoc::getFromPointer(DotDispStr.data());
+ unsigned Len = DotDispStr.size();
+ unsigned Val = OrigDispVal + DotDispVal;
+ InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_DotOperator, Loc, Len,
+ Val));
+ }
+
+ *NewDisp = MCConstantExpr::Create(OrigDispVal + DotDispVal, getContext());
+ return false;
+}
+
+/// Parse the 'offset' operator. This operator is used to specify the
+/// location rather then the content of a variable.
+X86Operand *X86AsmParser::ParseIntelOffsetOfOperator(SMLoc Start) {
+ SMLoc OffsetOfLoc = Start;
+ Parser.Lex(); // Eat offset.
+ Start = Parser.getTok().getLoc();
+ assert (Parser.getTok().is(AsmToken::Identifier) && "Expected an identifier");
+
+ SMLoc End;
+ const MCExpr *Val;
+ if (getParser().ParseExpression(Val, End))
+ return ErrorOperand(Start, "Unable to parse expression!");
+
+ End = Parser.getTok().getLoc();
+
+ // Don't emit the offset operator.
+ InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_Skip, OffsetOfLoc, 7));
+
+ // The offset operator will have an 'r' constraint, thus we need to create
+ // register operand to ensure proper matching. Just pick a GPR based on
+ // the size of a pointer.
+ unsigned RegNo = is64BitMode() ? X86::RBX : X86::EBX;
+ return X86Operand::CreateReg(RegNo, Start, End, OffsetOfLoc);
+}
+
+/// Parse the 'TYPE' operator. The TYPE operator returns the size of a C or
+/// C++ type or variable. If the variable is an array, TYPE returns the size of
+/// a single element of the array.
+X86Operand *X86AsmParser::ParseIntelTypeOperator(SMLoc Start) {
+ SMLoc TypeLoc = Start;
+ Parser.Lex(); // Eat offset.
+ Start = Parser.getTok().getLoc();
+ assert (Parser.getTok().is(AsmToken::Identifier) && "Expected an identifier");
+
+ SMLoc End;
+ const MCExpr *Val;
+ if (getParser().ParseExpression(Val, End))
+ return 0;
+
+ End = Parser.getTok().getLoc();
+
+ unsigned Size = 0;
+ if (const MCSymbolRefExpr *SymRef = dyn_cast<MCSymbolRefExpr>(Val)) {
+ const MCSymbol &Sym = SymRef->getSymbol();
+ // FIXME: The SemaLookup will fail if the name is anything other then an
+ // identifier.
+ // FIXME: Pass a valid SMLoc.
+ if (!SemaCallback->LookupInlineAsmIdentifier(Sym.getName(), NULL, Size))
+ return ErrorOperand(Start, "Unable to lookup TYPE of expr!");
+
+ Size /= 8; // Size is in terms of bits, but we want bytes in the context.
+ }
+
+ // Rewrite the type operator and the C or C++ type or variable in terms of an
+ // immediate. E.g. TYPE foo -> $$4
+ unsigned Len = End.getPointer() - TypeLoc.getPointer();
+ InstInfo->AsmRewrites->push_back(AsmRewrite(AOK_Imm, TypeLoc, Len, Size));
+
+ const MCExpr *Imm = MCConstantExpr::Create(Size, getContext());
+ return X86Operand::CreateImm(Imm, Start, End, /*NeedAsmRewrite*/false);
}
X86Operand *X86AsmParser::ParseIntelOperand() {
SMLoc Start = Parser.getTok().getLoc(), End;
+ // offset operator.
+ StringRef AsmTokStr = Parser.getTok().getString();
+ if ((AsmTokStr == "offset" || AsmTokStr == "OFFSET") &&
+ isParsingInlineAsm())
+ return ParseIntelOffsetOfOperator(Start);
+
+ // Type directive.
+ if ((AsmTokStr == "type" || AsmTokStr == "TYPE") &&
+ isParsingInlineAsm())
+ return ParseIntelTypeOperator(Start);
+
+ // Unsupported directives.
+ if (isParsingIntelSyntax() &&
+ (AsmTokStr == "size" || AsmTokStr == "SIZE" ||
+ AsmTokStr == "length" || AsmTokStr == "LENGTH"))
+ return ErrorOperand(Start, "Unsupported directive!");
+
// immediate.
if (getLexer().is(AsmToken::Integer) || getLexer().is(AsmToken::Real) ||
getLexer().is(AsmToken::Minus)) {
}
bool X86AsmParser::
-ParseInstruction(StringRef Name, SMLoc NameLoc,
+ParseInstruction(ParseInstructionInfo &Info, StringRef Name, SMLoc NameLoc,
SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+ InstInfo = &Info;
StringRef PatchedName = Name;
// FIXME: Hack to recognize setneb as setne.
}
}
+static const char *getSubtargetFeatureName(unsigned Val);
bool X86AsmParser::
MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
SmallVectorImpl<MCParsedAsmOperand*> &Operands,
Out.EmitInstruction(Inst);
Opcode = Inst.getOpcode();
return false;
- case Match_MissingFeature:
- Error(IDLoc, "instruction requires a CPU feature not currently enabled",
- EmptyRanges, MatchingInlineAsm);
- return true;
+ case Match_MissingFeature: {
+ assert(ErrorInfo && "Unknown missing feature!");
+ // Special case the error message for the very common case where only
+ // a single subtarget feature is missing.
+ std::string Msg = "instruction requires:";
+ unsigned Mask = 1;
+ for (unsigned i = 0; i < (sizeof(ErrorInfo)*8-1); ++i) {
+ if (ErrorInfo & Mask) {
+ Msg += " ";
+ Msg += getSubtargetFeatureName(ErrorInfo & Mask);
+ }
+ Mask <<= 1;
+ }
+ return Error(IDLoc, Msg, EmptyRanges, MatchingInlineAsm);
+ }
case Match_InvalidOperand:
WasOriginallyInvalidOperand = true;
break;
// Check for the various suffix matches.
Tmp[Base.size()] = Suffixes[0];
unsigned ErrorInfoIgnore;
+ unsigned ErrorInfoMissingFeature;
unsigned Match1, Match2, Match3, Match4;
Match1 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
isParsingIntelSyntax());
+ // If this returned as a missing feature failure, remember that.
+ if (Match1 == Match_MissingFeature)
+ ErrorInfoMissingFeature = ErrorInfoIgnore;
Tmp[Base.size()] = Suffixes[1];
Match2 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
isParsingIntelSyntax());
+ // If this returned as a missing feature failure, remember that.
+ if (Match2 == Match_MissingFeature)
+ ErrorInfoMissingFeature = ErrorInfoIgnore;
Tmp[Base.size()] = Suffixes[2];
Match3 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
isParsingIntelSyntax());
+ // If this returned as a missing feature failure, remember that.
+ if (Match3 == Match_MissingFeature)
+ ErrorInfoMissingFeature = ErrorInfoIgnore;
Tmp[Base.size()] = Suffixes[3];
Match4 = MatchInstructionImpl(Operands, Inst, ErrorInfoIgnore,
isParsingIntelSyntax());
+ // If this returned as a missing feature failure, remember that.
+ if (Match4 == Match_MissingFeature)
+ ErrorInfoMissingFeature = ErrorInfoIgnore;
// Restore the old token.
Op->setTokenValue(Base);
// missing feature.
if ((Match1 == Match_MissingFeature) + (Match2 == Match_MissingFeature) +
(Match3 == Match_MissingFeature) + (Match4 == Match_MissingFeature) == 1){
- Error(IDLoc, "instruction requires a CPU feature not currently enabled",
- EmptyRanges, MatchingInlineAsm);
- return true;
+ std::string Msg = "instruction requires:";
+ unsigned Mask = 1;
+ for (unsigned i = 0; i < (sizeof(ErrorInfoMissingFeature)*8-1); ++i) {
+ if (ErrorInfoMissingFeature & Mask) {
+ Msg += " ";
+ Msg += getSubtargetFeatureName(ErrorInfoMissingFeature & Mask);
+ }
+ Mask <<= 1;
+ }
+ return Error(IDLoc, Msg, EmptyRanges, MatchingInlineAsm);
}
// If one instruction matched with an invalid operand, report this as an
#define GET_REGISTER_MATCHER
#define GET_MATCHER_IMPLEMENTATION
+#define GET_SUBTARGET_FEATURE_NAME
#include "X86GenAsmMatcher.inc"
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