Return to submul_1.c CVS log

Up to [local] / OpenXM_contrib / gmp / mpn / ia64

Annotation of OpenXM_contrib/gmp/mpn/ia64/submul_1.c, Revision 1.1.1.1

1.1       ohara       1: /* IA-64 mpn_submul_1 -- Multiply a limb vector with a limb and subtract
                      2:    the result from a second limb vector.
                      3:
                      4: Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
                      5:
                      6: This file is part of the GNU MP Library.
                      7:
                      8: The GNU MP Library is free software; you can redistribute it and/or modify
                      9: it under the terms of the GNU Lesser General Public License as published
                     10: by the Free Software Foundation; either version 2.1 of the License, or (at
                     11: your option) any later version.
                     12:
                     13: The GNU MP Library is distributed in the hope that it will be useful, but
                     14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     16: License for more details.
                     17:
                     18: You should have received a copy of the GNU Lesser General Public License
                     19: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     21: MA 02111-1307, USA.
                     22:
                     23: This code runs at about 9 cycles/limb on the Itanium.  That's far from the peak
                     24: execution speed of the Itanium pipeline.  With well-tuned assembly code we
                     25: should be able to get to around 3 cycles/limb.  See README.  */
                     26:
                     27:
                     28: #include "gmp.h"
                     29: #include "gmp-impl.h"
                     30:
                     31: mp_limb_t
                     32: mpn_submul_1 (mp_ptr rp, mp_srcptr s1p, mp_size_t n, mp_limb_t s2d)
                     33: {
                     34:   mp_ptr tp;
                     35:   mp_limb_t cy;
                     36:   TMP_DECL (marker);
                     37:
                     38:   TMP_MARK (marker);
                     39:   tp = TMP_ALLOC_LIMBS (n);
                     40:   cy = mpn_mul_1 (tp, s1p, n, s2d);
                     41:   cy += mpn_sub_n (rp, rp, tp, n);
                     42:   TMP_FREE (marker);
                     43:   return cy;
                     44: }