Doxygenize the documentation comments

src/IceInstX8632.cpp

 //===- subzero/src/IceInstX8632.cpp - X86-32 instruction implementation ---===//
 //
 //                        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 InstX8632 and OperandX8632 classes,
-// primarily the constructors and the dump()/emit() methods.
-//
+///
+/// \file
+/// This file implements the InstX8632 and OperandX8632 classes,
+/// primarily the constructors and the dump()/emit() methods.
+///
 //===----------------------------------------------------------------------===//
 
 #include "IceInstX8632.h"
 
 #include "IceAssemblerX8632.h"
 #include "IceCfg.h"
 #include "IceCfgNode.h"
 #include "IceConditionCodesX8632.h"
 #include "IceInst.h"
 #include "IceRegistersX8632.h"
@@ skipping 3050 matching lines @@
   }
   Str << "(";
   if (Func)
     Var->dump(Func);
   else
     Var->dump(Str);
   Str << ")";
 }
 
 } // end of namespace Ice