1 files changed, 29 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Target/Mips/MipsInstrFormats.td b/contrib/llvm/lib/Target/Mips/MipsInstrFormats.td
index 8feb853..1ecbdc2 100644
--- a/contrib/llvm/lib/Target/Mips/MipsInstrFormats.td
+++ b/contrib/llvm/lib/Target/Mips/MipsInstrFormats.td
@@ -92,6 +92,14 @@ class PseudoSE<dag outs, dag ins, string asmstr, list<dag> pattern>:
   let Predicates = [HasStandardEncoding];
 }
 
+// Pseudo-instructions for alternate assembly syntax (never used by codegen).
+// These are aliases that require C++ handling to convert to the target
+// instruction, while InstAliases can be handled directly by tblgen.
+class MipsAsmPseudoInst<dag outs, dag ins, string asmstr>:
+  MipsInst<outs, ins, asmstr, [], IIPseudo, Pseudo> {
+  let isPseudo = 1;
+  let Pattern = [];
+}
 //===----------------------------------------------------------------------===//
 // Format R instruction class in Mips : <|opcode|rs|rt|rd|shamt|funct|>
 //===----------------------------------------------------------------------===//
@@ -163,6 +171,27 @@ class FJ<bits<6> op, dag outs, dag ins, string asmstr, list<dag> pattern,
   let Inst{25-0} = addr;
 }
 
+ //===----------------------------------------------------------------------===//
+// MFC instruction class in Mips : <|op|mf|rt|rd|0000000|sel|>
+//===----------------------------------------------------------------------===//
+class MFC3OP<bits<6> op, bits<5> _mfmt, dag outs, dag ins, string asmstr>:
+  InstSE<outs, ins, asmstr, [], NoItinerary, FrmFR>
+{
+  bits<5> mfmt;
+  bits<5> rt;
+  bits<5> rd;
+  bits<3> sel;
+
+  let Opcode = op;
+  let mfmt = _mfmt;
+
+  let Inst{25-21} = mfmt;
+  let Inst{20-16} = rt;
+  let Inst{15-11} = rd;
+  let Inst{10-3}  = 0;
+  let Inst{2-0}   = sel;
+}
+
 //===----------------------------------------------------------------------===//
 //
 //  FLOATING POINT INSTRUCTION FORMATS