Subzero: Add fabs intrinsic support.

src/IceIntrinsics.cpp

 //===- subzero/src/IceIntrinsics.cpp - Functions related to intrinsics ----===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file implements the Intrinsics utilities for matching and
@@ skipping 141 matching lines @@
     {                                                                          \
       INTRIN(Cttz, SideEffects_F, ReturnsTwice_F)                              \
       , {Overload, Overload, IceType_i1}, 3                                    \
     }                                                                          \
     , "cttz." NameSuffix                                                       \
   }
     CttzInit(IceType_i32, "i32"),
     CttzInit(IceType_i64, "i64"),
 #undef CttzInit
 
+#define FabsInit(Overload, NameSuffix)                                         \
+  {                                                                            \
+    { INTRIN(Fabs, SideEffects_F, ReturnsTwice_F), {Overload, Overload}, 2 }   \
+    , "fabs." NameSuffix                                                       \
+  }
+    FabsInit(IceType_f32, "f32"),
+    FabsInit(IceType_f64, "f64"),
+    FabsInit(IceType_v4f32, "v4f32"),
+#undef FabsInit
+
     {{INTRIN(Longjmp, SideEffects_T, ReturnsTwice_F),
       {IceType_void, IceType_i32, IceType_i32},
       3},
      "nacl.longjmp"},
     {{INTRIN(Memcpy, SideEffects_T, ReturnsTwice_F),
       {IceType_void, IceType_i32, IceType_i32, IceType_i32, IceType_i32,
        IceType_i1},
       6},
      "memcpy.p0i8.p0i8.i32"},
     {{INTRIN(Memmove, SideEffects_T, ReturnsTwice_F),
@@ skipping 153 matching lines @@
   return Intrinsics::IsValidCall;
 }
 
 Type Intrinsics::FullIntrinsicInfo::getArgType(SizeT Index) const {
   assert(NumTypes > 1);
   assert(Index + 1 < NumTypes);
   return Signature[Index + 1];
 }
 
 } // end of namespace Ice