[BACK]Return to tdiv_r_ui.c CVS log [TXT][DIR] Up to [local] / OpenXM_contrib / gmp / mpz

Diff for /OpenXM_contrib/gmp/mpz/Attic/tdiv_r_ui.c between version 1.1.1.2 and 1.1.1.3

version 1.1.1.2, 2000/09/09 14:13:00 version 1.1.1.3, 2003/08/25 16:06:34
Line 1 
Line 1 
 /* mpz_tdiv_r_ui(rem, dividend, divisor_limb)  /* mpz_tdiv_r_ui(rem, dividend, divisor_limb)
    -- Set REM to DIVDEND mod DIVISOR_LIMB.     -- Set REM to DIVDEND mod DIVISOR_LIMB.
   
 Copyright (C) 1991, 1993, 1994, 1996, 1998 Free Software Foundation, Inc.  Copyright 1991, 1993, 1994, 1996, 1998, 2001, 2002 Free Software Foundation,
   Inc.
   
 This file is part of the GNU MP Library.  This file is part of the GNU MP Library.
   
Line 24  MA 02111-1307, USA. */
Line 25  MA 02111-1307, USA. */
 #include "gmp-impl.h"  #include "gmp-impl.h"
   
 unsigned long int  unsigned long int
 #if __STDC__  
 mpz_tdiv_r_ui (mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)  mpz_tdiv_r_ui (mpz_ptr rem, mpz_srcptr dividend, unsigned long int divisor)
 #else  
 mpz_tdiv_r_ui (rem, dividend, divisor)  
      mpz_ptr rem;  
      mpz_srcptr dividend;  
      unsigned long int divisor;  
 #endif  
 {  {
   mp_size_t dividend_size;    mp_size_t ns, nn;
   mp_size_t size;    mp_ptr np;
   mp_limb_t remainder_limb;    mp_limb_t rl;
   
   if (divisor == 0)    if (divisor == 0)
     DIVIDE_BY_ZERO;      DIVIDE_BY_ZERO;
   
   dividend_size = dividend->_mp_size;    ns = SIZ(dividend);
   size = ABS (dividend_size);    if (ns == 0)
       {
         SIZ(rem) = 0;
         return 0;
       }
   
   /* No need for temporary allocation and copying if QUOT == DIVIDEND as    nn = ABS(ns);
      the divisor is just one limb, and thus no intermediate remainders    np = PTR(dividend);
      need to be stored.  */  #if GMP_NAIL_BITS != 0
     if (divisor > GMP_NUMB_MAX)
       {
         mp_limb_t dp[2];
         mp_ptr rp, qp;
         mp_size_t rn;
         TMP_DECL (mark);
   
   remainder_limb = mpn_mod_1 (dividend->_mp_d, size, (mp_limb_t) divisor);        if (nn == 1)              /* tdiv_qr requirements; tested above for 0 */
           {
             rl = np[0];
             SIZ(rem) = ns >= 0 ? 1 : -1;
             PTR(rem)[0] = rl;
             return rl;
           }
   
   if (remainder_limb == 0)        MPZ_REALLOC (rem, 2);
     rem->_mp_size = 0;        rp = PTR(rem);
   
         TMP_MARK (mark);
         dp[0] = divisor & GMP_NUMB_MASK;
         dp[1] = divisor >> GMP_NUMB_BITS;
         qp = TMP_ALLOC_LIMBS (nn - 2 + 1);
         mpn_tdiv_qr (qp, rp, (mp_size_t) 0, np, nn, dp, (mp_size_t) 2);
         TMP_FREE (mark);
         rl = rp[0] + (rp[1] << GMP_NUMB_BITS);
         rn = 2 - (rp[1] == 0);  rn -= (rp[rn - 1] == 0);
         SIZ(rem) = ns >= 0 ? rn : -rn;
       }
   else    else
   #endif
     {      {
       /* Store the single-limb remainder.  We don't check if there's space        rl = mpn_mod_1 (np, nn, (mp_limb_t) divisor);
          for just one limb, since no function ever makes zero space.  */        if (rl == 0)
       rem->_mp_size = dividend_size >= 0 ? 1 : -1;          SIZ(rem) = 0;
       rem->_mp_d[0] = remainder_limb;        else
           {
             /* Store the single-limb remainder.  We don't check if there's space
                for just one limb, since no function ever makes zero space.  */
             SIZ(rem) = ns >= 0 ? 1 : -1;
             PTR(rem)[0] = rl;
           }
     }      }
   
   return remainder_limb;    return rl;
 }  }
Legend:
Removed from v.1.1.1.2  
changed lines
  Added in v.1.1.1.3
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>