Hexagon V5 (floating point) support.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@155367 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Hexagon/HexagonSubtarget.cpp b/lib/Target/Hexagon/HexagonSubtarget.cpp
index 25ef4d4..f0e51e54 100644
--- a/lib/Target/Hexagon/HexagonSubtarget.cpp
+++ b/lib/Target/Hexagon/HexagonSubtarget.cpp
@@ -13,6 +13,7 @@
 
 #include "HexagonSubtarget.h"
 #include "Hexagon.h"
+#include "HexagonRegisterInfo.h"
 #include "llvm/Support/CommandLine.h"
 #include "llvm/Support/ErrorHandling.h"
 using namespace llvm;
@@ -31,6 +32,12 @@
     cl::Hidden, cl::ZeroOrMore, cl::ValueDisallowed,
     cl::desc("Generate V4 MEMOP in code generation for Hexagon target"));
 
+static cl::opt<bool>
+EnableIEEERndNear(
+    "enable-hexagon-ieee-rnd-near",
+    cl::Hidden, cl::ZeroOrMore, cl::init(false),
+    cl::desc("Generate non-chopped conversion from fp to int for Hexagon target."));
+
 HexagonSubtarget::HexagonSubtarget(StringRef TT, StringRef CPU, StringRef FS):
   HexagonGenSubtargetInfo(TT, CPU, FS),
   HexagonArchVersion(V2),
@@ -45,6 +52,8 @@
     break;
   case HexagonSubtarget::V4:
     break;
+  case HexagonSubtarget::V5:
+    break;
   default:
     llvm_unreachable("Unknown Architecture Version.");
   }
@@ -59,4 +68,10 @@
     UseMemOps = true;
   else
     UseMemOps = false;
+
+  if (EnableIEEERndNear)
+    ModeIEEERndNear = true;
+  else
+    ModeIEEERndNear = false;
 }
+