new functions (compatibility with mpf)

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@532 280ebfd0-de03-0410-8827-d642c229c3f4

1 files changed, 60 insertions, 0 deletions

diff --git a/sqrt_ui.c b/sqrt_ui.c
new file mode 100644
index 000000000..dbeb070ef
--- /dev/null
+++ b/sqrt_ui.c
@@ -0,0 +1,60 @@
+/* mpfr_sqrt_ui -- square root of a machine integer
+
+Copyright (C) 2000 PolKA project, Inria Lorraine and Loria
+
+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 Library General Public License as published by
+the Free Software Foundation; either version 2 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library 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. */
+
+#define MON_INIT(xp, x, p, s) xp = (mp_ptr) TMP_ALLOC(s*BYTES_PER_MP_LIMB);    x -> _mp_prec = p; x -> _mp_d = xp; x -> _mp_size = s;
+
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "mpfr.h"
+#include "longlong.h"
+
+int
+#if __STDC__
+mpfr_sqrt_ui (mpfr_ptr r, unsigned long u, mp_rnd_t rnd_mode)
+#else
+mpfr_sqrt_ui (r, u, rnd_mode)
+     mpfr_ptr r;
+     unsigned long u;
+     mp_rnd_t rnd_mode;
+#endif
+{
+  int exact=1;
+  mpfr_t uu;
+  mp_limb_t *up;
+  unsigned long cnt;
+  TMP_DECL(marker);
+
+  if (u) { /* if u=0, do nothing */
+    MON_INIT(up, uu, BITS_PER_MP_LIMB, 1);
+    count_leading_zeros(cnt, (mp_limb_t) u);
+    *up = (mp_limb_t) u << cnt;
+    EXP(uu) = BITS_PER_MP_LIMB-cnt;
+
+    exact = mpfr_sqrt(r, uu, rnd_mode);
+
+    TMP_FREE(marker);
+  }
+  else SET_ZERO(r);
+  return exact;
+}