ARM mode encoding information for UBFX and SBFX instructions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116588 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMMCCodeEmitter.cpp b/lib/Target/ARM/ARMMCCodeEmitter.cpp
index cafd3f2..6132d6d 100644
--- a/lib/Target/ARM/ARMMCCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMMCCodeEmitter.cpp
@@ -84,6 +84,10 @@
     }
   }
 
+  unsigned getImmMinusOneOpValue(const MCInst &MI, unsigned Op) const {
+    return MI.getOperand(Op).getImm() - 1;
+  }
+
   unsigned getNumFixupKinds() const {
     assert(0 && "ARMMCCodeEmitter::getNumFixupKinds() not yet implemented.");
     return 0;