[mips] Add assembler support for the .set nodsp directive.

Summary: This directive is used to tell the assembler to reject DSP-specific instructions.

Reviewers: dsanders

Reviewed By: dsanders

Differential Revision: http://reviews.llvm.org/D5142

llvm-svn: 217946

1 files changed, 17 insertions, 0 deletions

diff --git a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
index 4903dcff0da..5ae753f0a6d 100644
--- a/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
+++ b/llvm/lib/Target/Mips/AsmParser/MipsAsmParser.cpp
@@ -192,6 +192,7 @@ class MipsAsmParser : public MCTargetAsmParser {
   bool parseSetNoMacroDirective();
   bool parseSetMsaDirective();
   bool parseSetNoMsaDirective();
+  bool parseSetNoDspDirective();
   bool parseSetReorderDirective();
   bool parseSetNoReorderDirective();
   bool parseSetNoMips16Directive();
@@ -2654,6 +2655,20 @@ bool MipsAsmParser::parseSetNoMsaDirective() {
   return false;
 }
 
+bool MipsAsmParser::parseSetNoDspDirective() {
+  Parser.Lex(); // Eat "nodsp".
+
+  // 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;
+  }
+
+  clearFeatureBits(Mips::FeatureDSP, "dsp");
+  getTargetStreamer().emitDirectiveSetNoDsp();
+  return false;
+}
+
 bool MipsAsmParser::parseSetNoMips16Directive() {
   Parser.Lex();
   // If this is not the end of the statement, report an error.
@@ -3037,6 +3052,8 @@ bool MipsAsmParser::parseDirectiveSet() {
     return parseSetFeature(Mips::FeatureMips64r6);
   } else if (Tok.getString() == "dsp") {
     return parseSetFeature(Mips::FeatureDSP);
+  } else if (Tok.getString() == "nodsp") {
+    return parseSetNoDspDirective();
   } else if (Tok.getString() == "msa") {
     return parseSetMsaDirective();
   } else if (Tok.getString() == "nomsa") {