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Diff for /OpenXM_contrib/gmp/mpf/Attic/cmp_si.c between version 1.1.1.1 and 1.1.1.3

version 1.1.1.1, 2000/01/10 15:35:22 version 1.1.1.3, 2003/08/25 16:06:35
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 /* mpf_cmp_si -- Compare a float with a signed integer.  /* mpf_cmp_si -- Compare a float with a signed integer.
   
 Copyright (C) 1993, 1994, 1995 Free Software Foundation, Inc.  Copyright 1993, 1994, 1995, 1999, 2000, 2001, 2002 Free Software Foundation,
   Inc.
   
 This file is part of the GNU MP Library.  This file is part of the GNU MP Library.
   
 The GNU MP Library is free software; you can redistribute it and/or modify  The GNU MP Library is free software; you can redistribute it and/or modify
 it under the terms of the GNU Library General Public License as published by  it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2 of the License, or (at your  the Free Software Foundation; either version 2.1 of the License, or (at your
 option) any later version.  option) any later version.
   
 The GNU MP Library is distributed in the hope that it will be useful, but  The GNU MP Library is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 License for more details.  License for more details.
   
 You should have received a copy of the GNU Library General Public License  You should have received a copy of the GNU Lesser General Public License
 along with the GNU MP Library; see the file COPYING.LIB.  If not, write to  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 MA 02111-1307, USA. */  MA 02111-1307, USA. */
Line 23  MA 02111-1307, USA. */
Line 24  MA 02111-1307, USA. */
 #include "gmp-impl.h"  #include "gmp-impl.h"
   
 int  int
 #if __STDC__  mpf_cmp_si (mpf_srcptr u, long int vval)
 mpf_cmp_si (mpf_srcptr u, long int vslimb)  
 #else  
 mpf_cmp_si (u, vslimb)  
      mpf_srcptr u;  
      long int vslimb;  
 #endif  
 {  {
   mp_srcptr up;    mp_srcptr up;
   mp_size_t usize;    mp_size_t usize;
   mp_exp_t uexp;    mp_exp_t uexp;
     mp_limb_t ulimb;
   int usign;    int usign;
   
   uexp = u->_mp_exp;    uexp = u->_mp_exp;
   usize = u->_mp_size;    usize = u->_mp_size;
   
   /* 1. Are the signs different?  */    /* 1. Are the signs different?  */
   if ((usize < 0) == (vslimb < 0)) /* don't use xor, type size may differ */    if ((usize < 0) == (vval < 0)) /* don't use xor, type size may differ */
     {      {
       /* U and V are both non-negative or both negative.  */        /* U and V are both non-negative or both negative.  */
       if (usize == 0)        if (usize == 0)
         /* vslimb >= 0 */          /* vval >= 0 */
         return -(vslimb != 0);          return -(vval != 0);
       if (vslimb == 0)        if (vval == 0)
         /* usize >= 0 */          /* usize >= 0 */
         return usize != 0;          return usize != 0;
       /* Fall out.  */        /* Fall out.  */
Line 60  mpf_cmp_si (u, vslimb)
Line 56  mpf_cmp_si (u, vslimb)
   /* U and V have the same sign and are both non-zero.  */    /* U and V have the same sign and are both non-zero.  */
   
   usign = usize >= 0 ? 1 : -1;    usign = usize >= 0 ? 1 : -1;
     usize = ABS (usize);
     vval = ABS (vval);
   
   /* 2. Are the exponents different (V's exponent == 1)?  */    /* 2. Are the exponents different (V's exponent == 1)?  */
   #if GMP_NAIL_BITS != 0
     if (uexp > 1 + (vval > GMP_NUMB_MAX))
       return usign;
     if (uexp < 1 + (vval > GMP_NUMB_MAX))
       return -usign;
   #else
   if (uexp > 1)    if (uexp > 1)
     return usign;      return usign;
   if (uexp < 1)    if (uexp < 1)
     return -usign;      return -usign;
   #endif
   
   usize = ABS (usize);  
   vslimb = ABS (vslimb);  
   
   up = u->_mp_d;    up = u->_mp_d;
   
 #define STRICT_MPF_NORMALIZATION 0    ulimb = up[usize - 1];
 #if ! STRICT_MPF_NORMALIZATION  #if GMP_NAIL_BITS != 0
   /* Ignore zeroes at the low end of U and V.  */    if (usize >= 2 && uexp == 2)
       {
         if ((ulimb >> GMP_NAIL_BITS) != 0)
           return 1;
         ulimb = (ulimb << GMP_NUMB_BITS) | up[usize - 2];
         usize--;
       }
   #endif
     usize--;
   
     /* 3. Compare the most significant mantissa limb with V.  */
     if (ulimb > (unsigned long) vval)
       return usign;
     else if (ulimb < (unsigned long) vval)
       return -usign;
   
     /* Ignore zeroes at the low end of U.  */
   while (*up == 0)    while (*up == 0)
     {      {
       up++;        up++;
       usize--;        usize--;
     }      }
 #endif  
   
   /* 3. Now, if the number of limbs are different, we have a difference    /* 4. Now, if the number of limbs are different, we have a difference
      since we have made sure the trailing limbs are not zero.  */       since we have made sure the trailing limbs are not zero.  */
   if (usize > 1)    if (usize > 0)
     return usign;      return usign;
   
   /* 4. Compare the mantissas.  */  
   if (*up > vslimb)  
     return usign;  
   else if (*up < vslimb)  
     return -usign;  
   
   /* Wow, we got zero even if we tried hard to avoid it.  */    /* Wow, we got zero even if we tried hard to avoid it.  */
   return 0;    return 0;
Legend:
Removed from v.1.1.1.1  
changed lines
  Added in v.1.1.1.3
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