diff options
Diffstat (limited to 'Build/source/libs/mpfr/mpfr-src/src/uceil_log2.c')
-rw-r--r-- | Build/source/libs/mpfr/mpfr-src/src/uceil_log2.c | 67 |
1 files changed, 0 insertions, 67 deletions
diff --git a/Build/source/libs/mpfr/mpfr-src/src/uceil_log2.c b/Build/source/libs/mpfr/mpfr-src/src/uceil_log2.c deleted file mode 100644 index d82af18ff7d..00000000000 --- a/Build/source/libs/mpfr/mpfr-src/src/uceil_log2.c +++ /dev/null @@ -1,67 +0,0 @@ -/* __gmpfr_ceil_log2 - returns ceil(log(d)/log(2)) - -Copyright 1999-2004, 2006-2020 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. */ - -#include "mpfr-impl.h" - -/* returns ceil(log(d)/log(2)) if d > 0, - -1023 if d = +0, - and floor(log(-d)/log(2))+1 if d < 0 -*/ -long -__gmpfr_ceil_log2 (double d) -{ - long exp; -#if _MPFR_IEEE_FLOATS - union mpfr_ieee_double_extract x; - - x.d = d; - /* The cast below is useless in theory, but let us not depend on the - integer promotion rules (for instance, tcc is currently wrong). */ - exp = (long) x.s.exp - 1023; - MPFR_ASSERTN (exp < 1023); /* fail on infinities */ - x.s.exp = 1023; /* value for 1 <= d < 2 */ - if (x.d != 1.0) /* d: not a power of two? */ - exp++; - return exp; -#else /* _MPFR_IEEE_FLOATS */ - double m; - - if (d < 0.0) - return __gmpfr_floor_log2 (-d) + 1; - else if (d == 0.0) - return -1023; - else if (d >= 1.0) - { - exp = 0; - for (m = 1.0; m < d; m *= 2.0) - exp++; - } - else - { - exp = 1; - for (m = 1.0; m >= d; m *= 0.5) - exp--; - } -#endif /* _MPFR_IEEE_FLOATS */ - return exp; -} - |