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Annotation of OpenXM_contrib/gmp/mpn/cray/submul_1.c, Revision 1.1.1.1

1.1       maekawa     1: /* mpn_submul_1 for Cray PVP.
                      2:
                      3: Copyright (C) 1996, 2000 Free Software Foundation, Inc.
                      4:
                      5: This file is part of the GNU MP Library.
                      6:
                      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 2.1 of the License, or (at your
                     10: option) any later version.
                     11:
                     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.
                     16:
                     17: You should have received a copy of the GNU Lesser General Public License
                     18: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     20: MA 02111-1307, USA.  */
                     21:
                     22:
                     23: #include "gmp.h"
                     24: #include "gmp-impl.h"
                     25:
                     26: mp_limb_t
                     27: mpn_submul_1 (mp_ptr rp, mp_srcptr up, mp_size_t n, mp_limb_t limb)
                     28: {
                     29:   mp_ptr p0, p1, tp;
                     30:   mp_limb_t cy_limb;
                     31:   TMP_DECL (marker);
                     32:   TMP_MARK (marker);
                     33:
                     34:   p1 = TMP_ALLOC (n * BYTES_PER_MP_LIMB);
                     35:   p0 = TMP_ALLOC (n * BYTES_PER_MP_LIMB);
                     36:   tp = TMP_ALLOC (n * BYTES_PER_MP_LIMB);
                     37:
                     38:   GMPN_MULWW (p1, p0, up, &n, &limb);
                     39:   cy_limb = mpn_sub_n (tp, rp, p0, n);
                     40:   rp[0] = tp[0];
                     41:   cy_limb += mpn_sub_n (rp + 1, tp + 1, p1, n - 1);
                     42:   cy_limb += p1[n - 1];
                     43:
                     44:   TMP_FREE (marker);
                     45:   return cy_limb;
                     46: }