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+/* x86-64 __mpn_sub_n -- Add two limb vectors of the same length > 0 and store
+   sum in a third limb vector.
+   Copyright (C) 2006-2017 Free Software Foundation, Inc.
+   This file is part of the GNU MP Library.
+
+   The GNU MP 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 2.1 of the License, or (at your
+   option) any later version.
+
+   The GNU MP 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 MP Library; see the file COPYING.LIB.  If not,
+   see <http://www.gnu.org/licenses/>.  */
+
+#define func __mpn_sub_n
+#define ADCSBB sbb
+
+#include "add_n.S"