bool MipsAsmParser::parseSetNoAtDirective() {
MCAsmParser &Parser = getParser();
// Line should look like: ".set noat".
- // set at reg to 0.
+
+ // Set the $at register to $0.
AssemblerOptions.back()->setATReg(0);
- // eat noat
- Parser.Lex();
+
+ Parser.Lex(); // Eat "noat".
+
// If this is not the end of the statement, report an error.
if (getLexer().isNot(AsmToken::EndOfStatement)) {
reportParseError("unexpected token, expected end of statement");
return false;
}
+
+ getTargetStreamer().emitDirectiveSetNoAt();
Parser.Lex(); // Consume the EndOfStatement.
return false;
}
bool MipsAsmParser::parseSetAtDirective() {
+ // Line can be: ".set at", which sets $at to $1
+ // or ".set at=$reg", which sets $at to $reg.
MCAsmParser &Parser = getParser();
- // Line can be .set at - defaults to $1
- // or .set at=$reg
- int AtRegNo;
- getParser().Lex();
+ Parser.Lex(); // Eat "at".
+
if (getLexer().is(AsmToken::EndOfStatement)) {
+ // No register was specified, so we set $at to $1.
AssemblerOptions.back()->setATReg(1);
+
+ getTargetStreamer().emitDirectiveSetAt();
Parser.Lex(); // Consume the EndOfStatement.
return false;
- } else if (getLexer().is(AsmToken::Equal)) {
- getParser().Lex(); // Eat the '='.
- if (getLexer().isNot(AsmToken::Dollar)) {
- reportParseError("unexpected token, expected dollar sign '$'");
+ }
+
+ if (getLexer().isNot(AsmToken::Equal)) {
+ reportParseError("unexpected token, expected equals sign");
+ return false;
+ }
+ Parser.Lex(); // Eat "=".
+
+ if (getLexer().isNot(AsmToken::Dollar)) {
+ if (getLexer().is(AsmToken::EndOfStatement)) {
+ reportParseError("no register specified");
return false;
- }
- Parser.Lex(); // Eat the '$'.
- const AsmToken &Reg = Parser.getTok();
- if (Reg.is(AsmToken::Identifier)) {
- AtRegNo = matchCPURegisterName(Reg.getIdentifier());
- } else if (Reg.is(AsmToken::Integer)) {
- AtRegNo = Reg.getIntVal();
} else {
- reportParseError("unexpected token, expected identifier or integer");
- return false;
- }
-
- if (AtRegNo < 0 || AtRegNo > 31) {
- reportParseError("unexpected token in statement");
+ reportParseError("unexpected token, expected dollar sign '$'");
return false;
}
+ }
+ Parser.Lex(); // Eat "$".
- if (!AssemblerOptions.back()->setATReg(AtRegNo)) {
- reportParseError("invalid register");
- return false;
- }
- getParser().Lex(); // Eat the register.
+ // Find out what "reg" is.
+ unsigned AtRegNo;
+ const AsmToken &Reg = Parser.getTok();
+ if (Reg.is(AsmToken::Identifier)) {
+ AtRegNo = matchCPURegisterName(Reg.getIdentifier());
+ } else if (Reg.is(AsmToken::Integer)) {
+ AtRegNo = Reg.getIntVal();
+ } else {
+ reportParseError("unexpected token, expected identifier or integer");
+ return false;
+ }
- if (getLexer().isNot(AsmToken::EndOfStatement)) {
- reportParseError("unexpected token, expected end of statement");
- return false;
- }
- Parser.Lex(); // Consume the EndOfStatement.
+ // Check if $reg is a valid register. If it is, set $at to $reg.
+ if (!AssemblerOptions.back()->setATReg(AtRegNo)) {
+ reportParseError("invalid register");
return false;
- } else {
- reportParseError("unexpected token in statement");
+ }
+ Parser.Lex(); // Eat "reg".
+
+ // If this is not the end of the statement, report an error.
+ if (getLexer().isNot(AsmToken::EndOfStatement)) {
+ reportParseError("unexpected token, expected end of statement");
return false;
}
+
+ getTargetStreamer().emitDirectiveSetAtWithArg(AtRegNo);
+
+ Parser.Lex(); // Consume the EndOfStatement.
+ return false;
}
bool MipsAsmParser::parseSetReorderDirective() {