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Annotation of OpenXM_contrib/gmp/mpn/generic/divrem_1.c, Revision 1.1.1.1

1.1       maekawa     1: /* mpn_divrem_1(quot_ptr, qsize, dividend_ptr, dividend_size, divisor_limb) --
                      2:    Divide (DIVIDEND_PTR,,DIVIDEND_SIZE) by DIVISOR_LIMB.
                      3:    Write DIVIDEND_SIZE limbs of quotient at QUOT_PTR.
                      4:    Return the single-limb remainder.
                      5:    There are no constraints on the value of the divisor.
                      6:
                      7:    QUOT_PTR and DIVIDEND_PTR might point to the same limb.
                      8:
                      9: Copyright (C) 1996 Free Software Foundation, Inc.
                     10:
                     11: This file is part of the GNU MP Library.
                     12:
                     13: The GNU MP Library is free software; you can redistribute it and/or modify
                     14: it under the terms of the GNU Library General Public License as published by
                     15: the Free Software Foundation; either version 2 of the License, or (at your
                     16: option) any later version.
                     17:
                     18: The GNU MP Library is distributed in the hope that it will be useful, but
                     19: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     20: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
                     21: License for more details.
                     22:
                     23: You should have received a copy of the GNU Library General Public License
                     24: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     25: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     26: MA 02111-1307, USA. */
                     27:
                     28: #include "gmp.h"
                     29: #include "gmp-impl.h"
                     30: #include "longlong.h"
                     31:
                     32: mp_limb_t
                     33: #if __STDC__
                     34: mpn_divrem_1 (mp_ptr qp, mp_size_t qsize,
                     35:              mp_srcptr dividend_ptr, mp_size_t dividend_size,
                     36:              mp_limb_t divisor_limb)
                     37: #else
                     38: mpn_divrem_1 (qp, qsize, dividend_ptr, dividend_size, divisor_limb)
                     39:      mp_ptr qp;
                     40:      mp_size_t qsize;
                     41:      mp_srcptr dividend_ptr;
                     42:      mp_size_t dividend_size;
                     43:      mp_limb_t divisor_limb;
                     44: #endif
                     45: {
                     46:   mp_limb_t rlimb;
                     47:   long i;
                     48:
                     49:   /* Develop integer part of quotient.  */
                     50:   rlimb = mpn_divmod_1 (qp + qsize, dividend_ptr, dividend_size, divisor_limb);
                     51:
                     52:   if (qsize != 0)
                     53:     {
                     54:       for (i = qsize - 1; i >= 0; i--)
                     55:        udiv_qrnnd (qp[i], rlimb, rlimb, 0, divisor_limb);
                     56:     }
                     57:   return rlimb;
                     58: }