1 files changed, 75 insertions, 0 deletions
diff --git a/contrib/libgmp/mpf/sqrt.c b/contrib/libgmp/mpf/sqrt.c
new file mode 100644
index 0000000..6d115e4
--- /dev/null
+++ b/contrib/libgmp/mpf/sqrt.c
@@ -0,0 +1,75 @@
+/* mpf_sqrt -- Compute the square root of a float.
+
+Copyright (C) 1993, 1994, 1996 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 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 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 Library General Public
+License for more details.
+
+You should have received a copy of the GNU Library General Public License
+along with the GNU MP 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 "gmp.h"
+#include "gmp-impl.h"
+
+void
+#if __STDC__
+mpf_sqrt (mpf_ptr r, mpf_srcptr u)
+#else
+mpf_sqrt (r, u)
+     mpf_ptr r;
+     mpf_srcptr u;
+#endif
+{
+  mp_size_t usize;
+  mp_ptr up, tp;
+  mp_size_t prec;
+  mp_exp_t tsize, rexp;
+  TMP_DECL (marker);
+
+  usize = u->_mp_size;
+  if (usize <= 0)
+    {
+      usize = 1 - 1 / (usize == 0);	/* Divide by zero for negative OP.  */
+      r->_mp_size = usize;	/* cheat flow by using usize here */
+      r->_mp_exp = 0;
+      return;
+    }
+
+  TMP_MARK (marker);
+
+  prec = r->_mp_prec;
+  rexp = (u->_mp_exp + 1) >> 1;	/* round towards -inf */
+  tsize = 2 * prec + (u->_mp_exp & 1);
+
+  up = u->_mp_d;
+  tp = (mp_ptr) TMP_ALLOC (tsize * BYTES_PER_MP_LIMB);
+
+  if (usize > tsize)
+    {
+      up += usize - tsize;
+      usize = tsize;
+      MPN_COPY (tp, up, tsize);
+    }
+  else
+    {
+      MPN_ZERO (tp, tsize - usize);
+      MPN_COPY (tp + (tsize - usize), up, usize);
+    }
+
+  mpn_sqrtrem (r->_mp_d, NULL, tp, tsize);
+
+  r->_mp_size = (tsize + 1) / 2;
+  r->_mp_exp = rexp;
+  TMP_FREE (marker);
+}