From 11da511c784eca003deb90c23570f0873954e0de Mon Sep 17 00:00:00 2001 From: Duncan Wilkie Date: Sat, 18 Nov 2023 06:11:09 -0600 Subject: Initial commit. --- gmp-6.3.0/mpn/cray/rshift.c | 58 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 gmp-6.3.0/mpn/cray/rshift.c (limited to 'gmp-6.3.0/mpn/cray/rshift.c') diff --git a/gmp-6.3.0/mpn/cray/rshift.c b/gmp-6.3.0/mpn/cray/rshift.c new file mode 100644 index 0000000..9c4aa22 --- /dev/null +++ b/gmp-6.3.0/mpn/cray/rshift.c @@ -0,0 +1,58 @@ +/* mpn_rshift -- Shift right low level for Cray vector processors. + +Copyright (C) 2000 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 either: + + * 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. + +or + + * the GNU General Public License as published by the Free Software + Foundation; either version 2 of the License, or (at your option) any + later version. + +or both in parallel, as here. + +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 General Public License +for more details. + +You should have received copies of the GNU General Public License and the +GNU Lesser General Public License along with the GNU MP Library. If not, +see https://www.gnu.org/licenses/. */ + +#include +#include "gmp-impl.h" + +mp_limb_t +mpn_rshift (mp_ptr wp, mp_srcptr up, mp_size_t n, unsigned int cnt) +{ + unsigned sh_1, sh_2; + mp_size_t i; + mp_limb_t retval; + + sh_1 = cnt; + sh_2 = GMP_LIMB_BITS - sh_1; + retval = up[0] << sh_2; + +#pragma _CRI ivdep + for (i = 0; i < n - 1; i++) + { +#if 1 + wp[i] = (up[i] >> sh_1) | (up[i + 1] << sh_2); +#else + /* This is the recommended way, but at least on SV1 it is slower. */ + wp[i] = _dshiftr (up[i + 1], up[i], sh_1); +#endif + } + + wp[n - 1] = up[n - 1] >> sh_1; + return retval; +} -- cgit v1.2.3