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