/* IA-64 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
   the result from a second limb vector.

Copyright 2000, 2001, 2002 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/.  */


/* This code runs at about 9 cycles/limb on the Itanium.  That's far from the
   peak execution speed of the Itanium pipeline.  With well-tuned assembly code
   we should be able to get to around 2 cycles/limb.  */


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

mp_limb_t
mpn_submul_1 (mp_ptr rp, mp_srcptr s1p, mp_size_t n, mp_limb_t s2d)
{
  mp_ptr tp;
  mp_limb_t cy;
  TMP_DECL;

  TMP_MARK;
  tp = TMP_ALLOC_LIMBS (n);
  cy = mpn_mul_1 (tp, s1p, n, s2d);
  cy += mpn_sub_n (rp, rp, tp, n);
  TMP_FREE;
  return cy;
}