/* mpn_mulmid_n -- balanced middle product

   Contributed by David Harvey.

   THE FUNCTION IN THIS FILE IS INTERNAL WITH A MUTABLE INTERFACE.  IT IS ONLY
   SAFE TO REACH IT THROUGH DOCUMENTED INTERFACES.  IN FACT, IT IS ALMOST
   GUARANTEED THAT IT'LL CHANGE OR DISAPPEAR IN A FUTURE GNU MP RELEASE.

Copyright 2011 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 Lesser General Public License as published by
the Free Software Foundation; either version 3 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 Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */


#include "gmp.h"
#include "gmp-impl.h"


void
mpn_mulmid_n (mp_ptr rp, mp_srcptr ap, mp_srcptr bp, mp_size_t n)
{
  ASSERT (n >= 1);
  ASSERT (! MPN_OVERLAP_P (rp, n + 2, ap, 2*n - 1));
  ASSERT (! MPN_OVERLAP_P (rp, n + 2, bp, n));

  if (n < MULMID_TOOM42_THRESHOLD)
    {
      mpn_mulmid_basecase (rp, ap, 2*n - 1, bp, n);
    }
  else
    {
      mp_ptr scratch;
      TMP_DECL;
      TMP_MARK;
      scratch = TMP_ALLOC_LIMBS (mpn_toom42_mulmid_itch (n));
      mpn_toom42_mulmid (rp, ap, bp, n, scratch);
      TMP_FREE;
    }
}
