+/// parseCoprocOptionOperand - Try to parse an coprocessor option operand.
+/// coproc_option : '{' imm0_255 '}'
+ARMAsmParser::OperandMatchResultTy ARMAsmParser::
+parseCoprocOptionOperand(SmallVectorImpl<MCParsedAsmOperand*> &Operands) {
+ SMLoc S = Parser.getTok().getLoc();
+
+ // If this isn't a '{', this isn't a coprocessor immediate operand.
+ if (Parser.getTok().isNot(AsmToken::LCurly))
+ return MatchOperand_NoMatch;
+ Parser.Lex(); // Eat the '{'
+
+ const MCExpr *Expr;
+ SMLoc Loc = Parser.getTok().getLoc();
+ if (getParser().ParseExpression(Expr)) {
+ Error(Loc, "illegal expression");
+ return MatchOperand_ParseFail;
+ }
+ const MCConstantExpr *CE = dyn_cast<MCConstantExpr>(Expr);
+ if (!CE || CE->getValue() < 0 || CE->getValue() > 255) {
+ Error(Loc, "coprocessor option must be an immediate in range [0, 255]");
+ return MatchOperand_ParseFail;
+ }
+ int Val = CE->getValue();
+
+ // Check for and consume the closing '}'
+ if (Parser.getTok().isNot(AsmToken::RCurly))
+ return MatchOperand_ParseFail;
+ SMLoc E = Parser.getTok().getLoc();
+ Parser.Lex(); // Eat the '}'
+
+ Operands.push_back(ARMOperand::CreateCoprocOption(Val, S, E));
+ return MatchOperand_Success;
+}
+