Add mpfr_add_si, mpfr_sub_si, mpfr_si_sub, mpfr_mul_si, mpfr_div_si and

mpfr_si_div.
Add the corresponding test.


git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@2823 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 100 insertions, 0 deletions

diff --git a/si_op.c b/si_op.c
new file mode 100644
index 000000000..7ec876482
--- /dev/null
+++ b/si_op.c
@@ -0,0 +1,100 @@
+/* mpfr_add_si -- add a floating-point number with a machine integer
+   mpfr_sub_si -- sub  a floating-point number with a machine integer
+   mpfr_si_sub -- sub  a machine number with a floating-point number
+   mpfr_mul_si -- multiply a floating-point number by a machine integer
+   mpfr_div_si -- divide a floating-point number by a machine integer
+   mpfr_si_div -- divide a machine number by a floating-point number
+
+Copyright 2004 Free Software Foundation.
+
+This file is part of the MPFR Library.
+
+The 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 2.1 of the License, or (at your
+option) any later version.
+
+The 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 MPFR Library; see the file COPYING.LIB.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+MA 02111-1307, USA. */
+
+#include "mpfr-impl.h"
+
+int
+mpfr_add_si (mpfr_ptr y, mpfr_srcptr x, long int u, mp_rnd_t rnd_mode)
+{
+  if (u >= 0)
+    return mpfr_add_ui (y, x, u, rnd_mode);
+  else
+    return mpfr_sub_ui (y, x, -u, rnd_mode);
+}
+
+int
+mpfr_sub_si (mpfr_ptr y, mpfr_srcptr x, long int u, mp_rnd_t rnd_mode)
+{
+  if (u >= 0)
+    return mpfr_sub_ui (y, x, u, rnd_mode);
+  else
+    return mpfr_add_ui (y, x, -u, rnd_mode);
+}
+
+int
+mpfr_si_sub (mpfr_ptr y, long int u, mpfr_srcptr x, mp_rnd_t rnd_mode)
+{
+  if (u >= 0)
+    return mpfr_ui_sub (y, u, x, rnd_mode);
+  else
+    {
+    int res = -mpfr_add_ui (y, x, -u, rnd_mode);
+    MPFR_CHANGE_SIGN (y);
+    return res;
+    }
+}
+
+int mpfr_mul_si (mpfr_ptr y, mpfr_srcptr x, long int u, mp_rnd_t rnd_mode)
+{
+  int res;
+
+  if (u >= 0)
+    res = mpfr_mul_ui (y, x, u, rnd_mode);
+  else
+    {
+      res = -mpfr_mul_ui (y, x, -u, rnd_mode);
+      MPFR_CHANGE_SIGN (y);
+    }
+  return res;
+}
+
+int mpfr_div_si (mpfr_ptr y, mpfr_srcptr x, long int u, mp_rnd_t rnd_mode)
+{
+  int res;
+
+  if (u >= 0)
+    res = mpfr_div_ui (y, x, u, rnd_mode);
+  else
+    {
+      res = -mpfr_div_ui (y, x, -u, rnd_mode);
+      MPFR_CHANGE_SIGN (y);
+    }
+  return res;
+}
+
+int mpfr_si_div (mpfr_ptr y, long int u, mpfr_srcptr x,mp_rnd_t rnd_mode)
+{
+  int res;
+
+  if (u >= 0)
+    res = mpfr_ui_div (y, u, x, rnd_mode);
+  else
+    {
+      res = -mpfr_ui_div (y, -u, x, rnd_mode);
+      MPFR_CHANGE_SIGN (y);
+    }
+  return res;
+}