1 files changed, 34 insertions, 0 deletions
diff --git a/mpc/src/sub_fr.c b/mpc/src/sub_fr.c
new file mode 100644
index 0000000000..ade33a95cd
--- /dev/null
+++ b/mpc/src/sub_fr.c
@@ -0,0 +1,34 @@
+/* mpc_sub_fr -- Substract a floating-point number to the real part of a
+   complex number.
+
+Copyright (C) 2008, 2009, 2011 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_sub_fr (mpc_ptr a, mpc_srcptr b, mpfr_srcptr c, mpc_rnd_t rnd)
+{
+  int inex_re, inex_im;
+
+  inex_re = mpfr_sub (mpc_realref(a), mpc_realref(b), c, MPC_RND_RE(rnd));
+  inex_im = mpfr_set (mpc_imagref(a), mpc_imagref(b), MPC_RND_IM(rnd));
+
+  return MPC_INEX(inex_re, inex_im);
+}