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+/*********************                                                        */
+/*! \file roundingmode.h
+ ** \verbatim
+ ** Top contributors (to current version):
+ **   Aina Niemetz, Martin Brain, Tim King
+ ** This file is part of the CVC4 project.
+ ** Copyright (c) 2009-2020 by the authors listed in the file AUTHORS
+ ** in the top-level source directory and their institutional affiliations.
+ ** All rights reserved.  See the file COPYING in the top-level source
+ ** directory for licensing information.\endverbatim
+ **
+ ** \brief The definition of rounding mode values.
+ **
+ ** [[ Add lengthier description here ]]
+ ** \todo document this file
+ **/
+#include "cvc4_public.h"
+
+#ifndef CVC4__ROUNDINGMODE_H
+#define CVC4__ROUNDINGMODE_H
+
+#include <fenv.h>
+
+namespace CVC4 {
+
+/**
+ * A concrete instance of the rounding mode sort
+ */
+enum CVC4_PUBLIC RoundingMode
+{
+  roundNearestTiesToEven = FE_TONEAREST,
+  roundTowardPositive = FE_UPWARD,
+  roundTowardNegative = FE_DOWNWARD,
+  roundTowardZero = FE_TOWARDZERO,
+  // Initializes this to the diagonalization of the 4 other values.
+  roundNearestTiesToAway = (((~FE_TONEAREST) & 0x1) | ((~FE_UPWARD) & 0x2)
+                            | ((~FE_DOWNWARD) & 0x4) | ((~FE_TOWARDZERO) & 0x8))
+}; /* enum RoundingMode */
+
+/**
+ * Hash function for rounding mode values.
+ */
+struct CVC4_PUBLIC RoundingModeHashFunction
+{
+  inline size_t operator()(const RoundingMode& rm) const { return size_t(rm); }
+}; /* struct RoundingModeHashFunction */
+
+}  // namespace CVC4
+
+#endif