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Diff for /OpenXM_contrib/gmp/mpfr/Attic/set_si.c between version 1.1.1.1 and 1.1.1.2

version 1.1.1.1, 2000/09/09 14:12:19 version 1.1.1.2, 2003/08/25 16:06:07
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 /* mpfr_set_si, mpfr_set_ui -- set a MPFR number from a machine integer  /* mpfr_set_si -- set a MPFR number from a machine signed integer
   
 Copyright (C) 1999 PolKA project, Inria Lorraine and Loria  Copyright 1999, 2000, 2001 Free Software Foundation.
   
 This file is part of the MPFR Library.  This file is part of the MPFR Library.
   
 The MPFR Library is free software; you can redistribute it and/or modify  The MPFR 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 MPFR Library is distributed in the hope that it will be useful, but  The MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to  along with the MPFR 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. */
   
 #include <stdio.h>  
 #include "gmp.h"  #include "gmp.h"
 #include "gmp-impl.h"  #include "gmp-impl.h"
 #include "longlong.h"  #include "longlong.h"
 #include "mpfr.h"  #include "mpfr.h"
   #include "mpfr-impl.h"
   
 void  int
 #if __STDC__  mpfr_set_si (mpfr_ptr x, long i, mp_rnd_t rnd_mode)
 mpfr_set_si(mpfr_ptr x, long i, unsigned char rnd_mode)  
 #else  
 mpfr_set_si(x, i, rnd_mode)  
      mpfr_ptr x;  
      long i;  
      unsigned char rnd_mode;  
 #endif  
 {  {
   unsigned long xn, cnt; mp_limb_t ai;    int inex;
     mp_size_t xn;
     unsigned int cnt, nbits;
     mp_limb_t ai, *xp;
   
   if (i==0) { SET_ZERO(x); return; }    MPFR_CLEAR_FLAGS(x);
   xn = (PREC(x)-1)/BITS_PER_MP_LIMB;    if (i == 0)
   ai = ABS(i);      {
         MPFR_SET_ZERO(x);
         MPFR_SET_POS(x);
         MPFR_RET(0);
       }
   
   count_leading_zeros(cnt, ai);    xn = (MPFR_PREC(x)-1)/BITS_PER_MP_LIMB;
     ai = SAFE_ABS(long, i);
     count_leading_zeros(cnt, ai);
   
   x -> _mp_d[xn] = ai << cnt;    xp = MPFR_MANT(x);
     xp[xn] = ai << cnt;
   /* don't forget to put zero in lower limbs */    /* don't forget to put zero in lower limbs */
   MPN_ZERO(MANT(x), xn);    MPN_ZERO(xp, xn);
   x -> _mp_exp = BITS_PER_MP_LIMB - cnt;    /* set sign */
   /* warning: don't change the precision of x! */    if ((i < 0) ^ (MPFR_SIGN(x) < 0))
   if (i*SIGN(x) < 0) CHANGE_SIGN(x);      MPFR_CHANGE_SIGN(x);
   
   return;    MPFR_EXP(x) = nbits = BITS_PER_MP_LIMB - cnt;
 }    inex = mpfr_check_range(x, rnd_mode);
     if (inex)
       return inex; /* underflow or overflow */
   
 void    /* round if MPFR_PREC(x) smaller than length of i */
 #if __STDC__    if (MPFR_PREC(x) < nbits)
 mpfr_set_ui(mpfr_ptr x, unsigned long i, unsigned char rnd_mode)      {
 #else        int carry;
 mpfr_set_ui(x, i, rnd_mode)  
      mpfr_ptr x;  
      long i;  
      unsigned char rnd_mode;  
 #endif  
 {  
   unsigned int xn, cnt;  
   
   if (i==0) { SET_ZERO(x); return; }        carry = mpfr_round_raw(xp+xn, xp+xn, nbits, (i < 0), MPFR_PREC(x),
   xn = (PREC(x)-1)/BITS_PER_MP_LIMB;                               rnd_mode, &inex);
   count_leading_zeros(cnt, (mp_limb_t) i);        if (carry)
           {
             mp_exp_t exp = MPFR_EXP(x);
   
   x -> _mp_d[xn] = ((mp_limb_t) i) << cnt;            if (exp == __mpfr_emax)
   /* don't forget to put zero in lower limbs */              return mpfr_set_overflow(x, rnd_mode, (i < 0 ? -1 : 1));
   MPN_ZERO(MANT(x), xn);  
   x -> _mp_exp = BITS_PER_MP_LIMB - cnt;  
   /* warning: don't change the precision of x! */  
   if (SIGN(x) < 0) CHANGE_SIGN(x);  
   
   return;            MPFR_EXP(x)++;
 }            xp[xn] = GMP_LIMB_HIGHBIT;
           }
       }
   
     MPFR_RET(inex);
   }
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