1 files changed, 33 insertions, 0 deletions
diff --git a/mpc/src/fr_sub.c b/mpc/src/fr_sub.c
new file mode 100644
index 0000000000..91338a4fd6
--- /dev/null
+++ b/mpc/src/fr_sub.c
@@ -0,0 +1,33 @@
+/* mpc_fr_sub -- Substract a complex number from a floating-point number.
+
+Copyright (C) 2008, 2009, 2011, 2012 INRIA
+
+This file is part of GNU MPC.
+
+GNU MPC 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.
+
+GNU MPC 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 this program. If not, see http://www.gnu.org/licenses/ .
+*/
+
+#include "mpc-impl.h"
+
+/* return 0 iff both the real and imaginary parts are exact */
+int
+mpc_fr_sub (mpc_ptr a, mpfr_srcptr b, mpc_srcptr c, mpc_rnd_t rnd)
+{
+  int inex_re, inex_im;
+
+  inex_re = mpfr_sub (mpc_realref (a), b, mpc_realref (c), MPC_RND_RE (rnd));
+  inex_im = mpfr_neg (mpc_imagref (a), mpc_imagref (c), MPC_RND_IM (rnd));
+
+  return MPC_INEX(inex_re, inex_im);
+}