--- /dev/null
+/*BEGIN_LEGAL
+Intel Open Source License
+
+Copyright (c) 2002-2007 Intel Corporation
+All rights reserved.
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+Redistributions of source code must retain the above copyright notice,
+this list of conditions and the following disclaimer. Redistributions
+in binary form must reproduce the above copyright notice, this list of
+conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution. Neither the name of
+the Intel Corporation nor the names of its contributors may be used to
+endorse or promote products derived from this software without
+specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE INTEL OR
+ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+END_LEGAL */
+/// @file xed-reg-class.h
+/// @author Mark Charney <mark.charney@intel.com>
+
+#ifndef _XED_REG_CLASS_H_
+# define _XED_REG_CLASS_H_
+
+#include "xed-types.h"
+#include "xed-reg-enum.h" // a generated file
+#include "xed-reg-class-enum.h" // a generated file
+
+/// Returns the register class of the given input register.
+///@ingroup REGINTFC
+XED_DLL_EXPORT xed_reg_class_enum_t xed_reg_class(xed_reg_enum_t r);
+
+/// Returns the specific width GPR reg class (like XED_REG_CLASS_GPR32 or XED_REG_CLASS_GPR64)
+/// for a given GPR register. Or XED_REG_INVALID if not a GPR.
+///@ingroup REGINTFC
+XED_DLL_EXPORT xed_reg_class_enum_t xed_gpr_reg_class(xed_reg_enum_t r);
+
+/// Returns the largest enclosing register for any kind of register; This is mostly useful for GPRs.
+///@ingroup REGINTFC
+XED_DLL_EXPORT xed_reg_enum_t xed_get_largest_enclosing_register(xed_reg_enum_t r);
+
+
+////////////////////////////////////////////////////////////////////////////
+
+#endif