vasilito
ff4ff35918
Red Bear OS is a full fork. All sources must be available from git clone with zero network access. Removed gitignore rules that excluded fetched source trees under recipes/*/source/, local/recipes/kde/*/source/, local/recipes/qt/*/source/, and vendor source trees. Build artifacts (target/, build/, source.tar, *.o, *.so) remain excluded. 127291 files added — kernel, relibc, base, bootloader, pkgar, all KDE/Qt frameworks, mesa, wayland, DRM drivers, and every other recipe source.
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/* __gmpfr_int_ceil_log2 -- Integer ceil of log2(x)
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Copyright 2004-2025 Free Software Foundation, Inc.
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Contributed by the Pascaline and Caramba projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU 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 Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER.
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If not, see <https://www.gnu.org/licenses/>. */
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#define MPFR_NEED_LONGLONG_H /* for count_leading_zeros */
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#include "mpfr-impl.h"
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int
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__gmpfr_int_ceil_log2 (unsigned long n)
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{
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if (MPFR_UNLIKELY (n == 1))
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return 0;
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else
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#ifdef MPFR_LONG_WITHIN_LIMB
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{
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int b;
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mp_limb_t limb;
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MPFR_ASSERTN (n > 1);
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limb = n - 1;
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MPFR_ASSERTN (limb == n - 1);
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count_leading_zeros (b, limb);
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b = GMP_NUMB_BITS - b;
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MPFR_ASSERTD (b >= 0);
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return b;
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}
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#else
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return mpfr_nbits_ulong (n - 1);
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#endif
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}
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