=================================================================== RCS file: /home/cvs/OpenXM_contrib/gmp/mpfr/Attic/set_si.c,v retrieving revision 1.1 retrieving revision 1.1.1.2 diff -u -p -r1.1 -r1.1.1.2 --- OpenXM_contrib/gmp/mpfr/Attic/set_si.c 2000/09/09 14:12:19 1.1 +++ OpenXM_contrib/gmp/mpfr/Attic/set_si.c 2003/08/25 16:06:07 1.1.1.2 @@ -1,81 +1,81 @@ -/* 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. 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 -the Free Software Foundation; either version 2 of the License, or (at your +it under the terms of the GNU Lesser General Public License as published by +the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The MPFR Library is distributed in the hope that it will be useful, but 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. -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 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ -#include #include "gmp.h" #include "gmp-impl.h" #include "longlong.h" #include "mpfr.h" +#include "mpfr-impl.h" -void -#if __STDC__ -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 +int +mpfr_set_si (mpfr_ptr x, long i, mp_rnd_t rnd_mode) { - 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; } - xn = (PREC(x)-1)/BITS_PER_MP_LIMB; - ai = ABS(i); + MPFR_CLEAR_FLAGS(x); + if (i == 0) + { + 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 */ - MPN_ZERO(MANT(x), xn); - x -> _mp_exp = BITS_PER_MP_LIMB - cnt; - /* warning: don't change the precision of x! */ - if (i*SIGN(x) < 0) CHANGE_SIGN(x); + MPN_ZERO(xp, xn); + /* set sign */ + if ((i < 0) ^ (MPFR_SIGN(x) < 0)) + 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 -#if __STDC__ -mpfr_set_ui(mpfr_ptr x, unsigned long i, unsigned char rnd_mode) -#else -mpfr_set_ui(x, i, rnd_mode) - mpfr_ptr x; - long i; - unsigned char rnd_mode; -#endif -{ - unsigned int xn, cnt; + /* round if MPFR_PREC(x) smaller than length of i */ + if (MPFR_PREC(x) < nbits) + { + int carry; - if (i==0) { SET_ZERO(x); return; } - xn = (PREC(x)-1)/BITS_PER_MP_LIMB; - count_leading_zeros(cnt, (mp_limb_t) i); + carry = mpfr_round_raw(xp+xn, xp+xn, nbits, (i < 0), MPFR_PREC(x), + rnd_mode, &inex); + if (carry) + { + mp_exp_t exp = MPFR_EXP(x); - x -> _mp_d[xn] = ((mp_limb_t) i) << cnt; - /* don't forget to put zero in lower limbs */ - 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); + if (exp == __mpfr_emax) + return mpfr_set_overflow(x, rnd_mode, (i < 0 ? -1 : 1)); - return; -} + MPFR_EXP(x)++; + xp[xn] = GMP_LIMB_HIGHBIT; + } + } + MPFR_RET(inex); +}