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/* mpn_submul_1 for Cray PVP.
Copyright 1996, 2000, 2001 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"
mp_limb_t
mpn_submul_1 (mp_ptr rp, mp_srcptr up, mp_size_t n, mp_limb_t limb)
{
mp_limb_t p0[n], p1[n], tp[n];
mp_limb_t cy_limb;
GMPN_MULWW (p1, p0, up, &n, &limb);
cy_limb = mpn_sub_n (tp, rp, p0, n);
rp[0] = tp[0];
if (n != 1)
cy_limb += mpn_sub_n (rp + 1, tp + 1, p1, n - 1);
cy_limb += p1[n - 1];
return cy_limb;
}
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