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Diff for /OpenXM_contrib/gmp/mpf/Attic/cmp_si.c between version 1.1.1.2 and 1.1.1.3

version 1.1.1.2, 2000/09/09 14:13:13 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, 1999, 2000 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.
   
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;
   
     ulimb = up[usize - 1];
   #if GMP_NAIL_BITS != 0
     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.  */    /* 3. Compare the most significant mantissa limb with V.  */
   if (up[usize - 1] > (unsigned long) vslimb)    if (ulimb > (unsigned long) vval)
     return usign;      return usign;
   else if (up[usize - 1] < (unsigned long) vslimb)    else if (ulimb < (unsigned long) vval)
     return -usign;      return -usign;
   
 #define STRICT_MPF_NORMALIZATION 0  
 #if ! STRICT_MPF_NORMALIZATION  
   /* Ignore zeroes at the low end of U.  */    /* Ignore zeroes at the low end of U.  */
   while (*up == 0)    while (*up == 0)
     {      {
       up++;        up++;
       usize--;        usize--;
     }      }
 #endif  
   
   /* 4. 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;
   
   /* Wow, we got zero even if we tried hard to avoid it.  */    /* Wow, we got zero even if we tried hard to avoid it.  */
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Removed from v.1.1.1.2  
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  Added in v.1.1.1.3
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