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diff --git a/Build/source/libs/mpfr/mpfr-src/src/total_order.c b/Build/source/libs/mpfr/mpfr-src/src/total_order.c
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+/* mpfr_total_order_p -- total order of two floating-point numbers
+
+Copyright 2018-2020 Free Software Foundation, Inc.
+Contributed by the AriC and Caramba projects, INRIA.
+
+This file is part of the GNU MPFR Library.
+
+The GNU MPFR Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MPFR Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
+https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
+51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#include "mpfr-impl.h"
+
+/* follows IEEE 754-2008, Section 5.10 */
+int
+mpfr_total_order_p (mpfr_srcptr x, mpfr_srcptr y)
+{
+ if (MPFR_SIGN (x) != MPFR_SIGN (y))
+ return MPFR_IS_POS (y);
+
+ if (MPFR_IS_NAN (x))
+ return MPFR_IS_NAN (y) || MPFR_IS_NEG (x);
+
+ /* Now x is not NaN. */
+ if (MPFR_IS_NAN (y))
+ return MPFR_IS_POS (y); /* x < +NaN, x > -NaN */
+
+ /* Now neither x nor y is NaN, and zeros of different sign have
+ already been taken into account. */
+ return mpfr_lessequal_p (x, y);
+}