1 files changed, 54 insertions, 0 deletions
diff --git a/Build/source/libs/mpfr/mpfr-3.1.3/src/swap.c b/Build/source/libs/mpfr/mpfr-3.1.3/src/swap.c
new file mode 100644
index 00000000000..99f2a507af6
--- /dev/null
+++ b/Build/source/libs/mpfr/mpfr-3.1.3/src/swap.c
@@ -0,0 +1,54 @@
+/* mpfr_swap (U, V) -- Swap U and V.
+
+Copyright 2000-2004, 2006-2015 Free Software Foundation, Inc.
+Contributed by the AriC and Caramel 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
+http://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"
+
+/* Using memcpy is a few slower than swapping by hand. */
+
+void
+mpfr_swap (mpfr_ptr u, mpfr_ptr v)
+{
+  mpfr_prec_t p1, p2;
+  mpfr_sign_t s1, s2;
+  mpfr_exp_t e1, e2;
+  mp_limb_t *m1, *m2;
+
+  p1 = MPFR_PREC(u);
+  p2 = MPFR_PREC(v);
+  MPFR_PREC(v) = p1;
+  MPFR_PREC(u) = p2;
+
+  s1 = MPFR_SIGN(u);
+  s2 = MPFR_SIGN(v);
+  MPFR_SIGN(v) = s1;
+  MPFR_SIGN(u) = s2;
+
+  e1 = MPFR_EXP(u);
+  e2 = MPFR_EXP(v);
+  MPFR_EXP(v) = e1;
+  MPFR_EXP(u) = e2;
+
+  m1 = MPFR_MANT(u);
+  m2 = MPFR_MANT(v);
+  MPFR_MANT(v) = m1;
+  MPFR_MANT(u) = m2;
+}