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Refactor. 

llvm-svn: 148131
This commit is contained in:
Devang Patel 2012-01-13 19:12:18 +00:00
parent 5d85276e30
commit 7ecdc6d4f5
1 changed files with 46 additions and 40 deletions
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86
llvm/lib/Target/X86/AsmParser/X86AsmParser.cpp
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@ -48,6 +48,7 @@ private:
X86Operand *ParseOperand();
X86Operand *ParseATTOperand();
X86Operand *ParseIntelOperand();
X86Operand *ParseIntelMemOperand(StringRef TokenString, unsigned Size);
X86Operand *ParseMemOperand(unsigned SegReg, SMLoc StartLoc);
bool ParseDirectiveWord(unsigned Size, SMLoc L);
@ -573,58 +574,63 @@ static bool isIntelMemOperand(StringRef OpStr, unsigned &Size) {
return Size != 0;
}
/// ParseIntelMemOperand - Parse intel style memory operand.
X86Operand *X86AsmParser::ParseIntelMemOperand(StringRef TokenString,
unsigned Size) {
SMLoc Start = Parser.getTok().getLoc(), End;
unsigned SegReg = 0, BaseReg = 0, IndexReg = 0, Scale = 1;
Parser.Lex();
if (TokenString == "PTR")
Parser.Lex();
else {
Error(Start, "unexpected token!");
return 0;
}
if (TokenString == "[")
Parser.Lex();
else {
Error(Start, "unexpected token!");
return 0;
}
SMLoc LParenLoc = Parser.getTok().getLoc();
BaseReg = getIntelRegisterOperand(TokenString);
if (BaseReg == 0) {
Error(LParenLoc, "unexpected token!");
return 0;
}
Parser.Lex();
const MCExpr *Disp = MCConstantExpr::Create(0, getParser().getContext());
SMLoc ExprEnd;
if (getParser().ParseExpression(Disp, ExprEnd)) return 0;
End = Parser.getTok().getLoc();
if (TokenString == "]")
Parser.Lex();
if (BaseReg == 0) {
Error(End, "unexpected token!");
return 0;
}
return X86Operand::CreateMem(SegReg, Disp, BaseReg, IndexReg, Scale,
Start, End, Size);
}
X86Operand *X86AsmParser::ParseIntelOperand() {
const AsmToken &Tok = Parser.getTok();
StringRef TokenString = Parser.getTok().getString();
SMLoc Start = Parser.getTok().getLoc(), End;
// register
if(unsigned RegNo = getIntelRegisterOperand(Tok.getString())) {
if(unsigned RegNo = getIntelRegisterOperand(TokenString)) {
Parser.Lex();
End = Parser.getTok().getLoc();
return X86Operand::CreateReg(RegNo, Start, End);
}
// mem operand
unsigned SegReg = 0, BaseReg = 0, IndexReg = 0, Scale = 1;
StringRef OpStr = Tok.getString();
unsigned Size = 0;
if (isIntelMemOperand(OpStr, Size)) {
Parser.Lex();
if (Tok.getString() == "PTR")
Parser.Lex();
else {
Error(Start, "unexpected token!");
return 0;
}
if (Tok.getString() == "[")
Parser.Lex();
else {
Error(Start, "unexpected token!");
return 0;
}
SMLoc LParenLoc = Parser.getTok().getLoc();
BaseReg = getIntelRegisterOperand(Tok.getString());
if (BaseReg == 0) {
Error(LParenLoc, "unexpected token!");
return 0;
}
Parser.Lex();
const MCExpr *Disp = MCConstantExpr::Create(0, getParser().getContext());
SMLoc ExprEnd;
if (getParser().ParseExpression(Disp, ExprEnd)) return 0;
End = Parser.getTok().getLoc();
if (Tok.getString() == "]")
Parser.Lex();
if (BaseReg == 0) {
Error(End, "unexpected token!");
return 0;
}
return X86Operand::CreateMem(SegReg, Disp, BaseReg, IndexReg, Scale,
Start, End, Size);
}
if (isIntelMemOperand(TokenString, Size))
ParseIntelMemOperand(TokenString, Size);
// immediate.
const MCExpr *Val;