mirror of https://github.com/macssh/macssh.git
82 lines
2.1 KiB
C
Executable File
82 lines
2.1 KiB
C
Executable File
/* mpfr_set_si, mpfr_set_ui -- set a MPFR number from a machine integer
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Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
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This file is part of the MPFR Library.
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The MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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The MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public License
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along with the MPFR Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "longlong.h"
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#include "mpfr.h"
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void
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#if __STDC__
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mpfr_set_si(mpfr_ptr x, long i, unsigned char rnd_mode)
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#else
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mpfr_set_si(x, i, rnd_mode)
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mpfr_ptr x;
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long i;
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unsigned char rnd_mode;
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#endif
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{
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unsigned long xn, cnt; mp_limb_t ai;
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if (i==0) { SET_ZERO(x); return; }
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xn = (PREC(x)-1)/BITS_PER_MP_LIMB;
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ai = ABS(i);
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count_leading_zeros(cnt, ai);
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x -> _mp_d[xn] = ai << cnt;
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/* don't forget to put zero in lower limbs */
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MPN_ZERO(MANT(x), xn);
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x -> _mp_exp = BITS_PER_MP_LIMB - cnt;
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/* warning: don't change the precision of x! */
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if (i*SIGN(x) < 0) CHANGE_SIGN(x);
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return;
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}
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void
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#if __STDC__
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mpfr_set_ui(mpfr_ptr x, unsigned long i, unsigned char rnd_mode)
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#else
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mpfr_set_ui(x, i, rnd_mode)
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mpfr_ptr x;
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long i;
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unsigned char rnd_mode;
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#endif
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{
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unsigned int xn, cnt;
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if (i==0) { SET_ZERO(x); return; }
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xn = (PREC(x)-1)/BITS_PER_MP_LIMB;
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count_leading_zeros(cnt, (mp_limb_t) i);
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x -> _mp_d[xn] = ((mp_limb_t) i) << cnt;
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/* don't forget to put zero in lower limbs */
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MPN_ZERO(MANT(x), xn);
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x -> _mp_exp = BITS_PER_MP_LIMB - cnt;
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/* warning: don't change the precision of x! */
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if (SIGN(x) < 0) CHANGE_SIGN(x);
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return;
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}
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