1 /* mpn_rshift -- Shift right low level for Cray vector processors.
3 Copyright (C) 2000 Free Software Foundation, Inc.
5 This file is part of the GNU MP Library.
7 The GNU MP Library is free software; you can redistribute it and/or modify
8 it under the terms of the GNU Lesser General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or (at your
10 option) any later version.
12 The GNU MP Library is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15 License for more details.
17 You should have received a copy of the GNU Lesser General Public License
18 along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
20 #include <intrinsics.h>
25 mpn_rshift (mp_ptr wp, mp_srcptr up, mp_size_t n, unsigned int cnt)
32 sh_2 = GMP_LIMB_BITS - sh_1;
33 retval = up[0] << sh_2;
36 for (i = 0; i < n - 1; i++)
39 wp[i] = (up[i] >> sh_1) | (up[i + 1] << sh_2);
41 /* This is the recommended way, but at least on SV1 it is slower. */
42 wp[i] = _dshiftr (up[i + 1], up[i], sh_1);
46 wp[n - 1] = up[n - 1] >> sh_1;