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Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/set_f.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/set_f.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/set_f.c b/Build/source/libs/mpfr/mpfr-src/src/set_f.c deleted file mode 100644 index 76cdbbf85df..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/set_f.c +++ /dev/null @@ -1,103 +0,0 @@ -/* mpfr_set_f -- set a MPFR number from a GNU MPF number - -Copyright 1999-2020 Free Software Foundation, Inc. -Contributed by the AriC and Caramba projects, INRIA. - -This file is part of the GNU MPFR Library. - -The GNU MPFR Library is free software; you can redistribute it and/or modify -it under the terms of the GNU Lesser General Public License as published by -the Free Software Foundation; either version 3 of the License, or (at your -option) any later version. - -The GNU 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 Lesser General Public -License for more details. - -You should have received a copy of the GNU Lesser General Public License -along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see -https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc., -51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */ - -#define MPFR_NEED_LONGLONG_H -#define MPFR_NEED_MPF_INTERNALS -#include "mpfr-impl.h" - -#ifndef MPFR_USE_MINI_GMP -int -mpfr_set_f (mpfr_ptr y, mpf_srcptr x, mpfr_rnd_t rnd_mode) -{ - mp_limb_t *my, *mx, *tmp; - int cnt; - mp_size_t sx, sy; - int inexact, carry = 0; - MPFR_TMP_DECL(marker); - - sx = ABSIZ(x); /* number of limbs of the mantissa of x */ - - if (sx == 0) /* x is zero */ - { - MPFR_SET_ZERO(y); - MPFR_SET_POS(y); - return 0; /* 0 is exact */ - } - - if (SIZ(x) * MPFR_FROM_SIGN_TO_INT(MPFR_SIGN(y)) < 0) - MPFR_CHANGE_SIGN (y); - - sy = MPFR_LIMB_SIZE (y); - my = MPFR_MANT(y); - mx = PTR(x); - - count_leading_zeros(cnt, mx[sx - 1]); - - if (sy <= sx) /* we may have to round even when sy = sx */ - { - mpfr_prec_t xprec = (mpfr_prec_t) sx * GMP_NUMB_BITS; - - MPFR_TMP_MARK(marker); - tmp = MPFR_TMP_LIMBS_ALLOC (sx); - if (cnt) - mpn_lshift (tmp, mx, sx, cnt); - else - /* FIXME: we may avoid the copy here, and directly call mpfr_round_raw - on mx instead of tmp */ - MPN_COPY (tmp, mx, sx); - carry = mpfr_round_raw (my, tmp, xprec, (SIZ(x) < 0), MPFR_PREC(y), - rnd_mode, &inexact); - if (MPFR_UNLIKELY(carry)) /* result is a power of two */ - my[sy - 1] = MPFR_LIMB_HIGHBIT; - MPFR_TMP_FREE(marker); - } - else - { - if (cnt) - mpn_lshift (my + sy - sx, mx, sx, cnt); - else - MPN_COPY (my + sy - sx, mx, sx); - MPN_ZERO(my, sy - sx); - /* no rounding necessary, since y has a larger mantissa */ - inexact = 0; - } - - /* warning: EXP(x) * GMP_NUMB_BITS may exceed the maximal exponent */ - if (EXP(x) > 1 + (__gmpfr_emax - 1) / GMP_NUMB_BITS) - { - /* EXP(x) >= 2 + floor((__gmpfr_emax-1)/GMP_NUMB_BITS) - EXP(x) >= 2 + (__gmpfr_emax - GMP_NUMB_BITS) / GMP_NUMB_BITS - >= 1 + __gmpfr_emax / GMP_NUMB_BITS - EXP(x) * GMP_NUMB_BITS >= __gmpfr_emax + GMP_NUMB_BITS - Since 0 <= cnt <= GMP_NUMB_BITS-1, and 0 <= carry <= 1, - we have then EXP(x) * GMP_NUMB_BITS - cnt + carry > __gmpfr_emax */ - return mpfr_overflow (y, rnd_mode, MPFR_SIGN (y)); - } - else - { - /* Do not use MPFR_SET_EXP as the exponent may be out of range. */ - MPFR_EXP (y) = EXP (x) * GMP_NUMB_BITS - cnt + carry; - } - - return mpfr_check_range (y, inexact, rnd_mode); -} -#endif |