vasilito
facf0c92e0
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.
70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
/* mpn_rshift -- Shift right low level.
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Copyright 1991, 1993, 1994, 1996, 2000-2002 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free Software
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Foundation; either version 2 of the License, or (at your option) any
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later version.
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or both in parallel, as here.
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The GNU MP 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 General Public License
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for more details.
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You should have received copies of the GNU General Public License and the
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GNU Lesser General Public License along with the GNU MP Library. If not,
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see https://www.gnu.org/licenses/. */
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#include "gmp-impl.h"
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/* Shift U (pointed to by up and N limbs long) cnt bits to the right
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and store the n least significant limbs of the result at rp.
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The bits shifted out to the right are returned.
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Argument constraints:
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1. 0 < cnt < GMP_NUMB_BITS.
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2. If the result is to be written over the input, rp must be <= up.
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*/
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mp_limb_t
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mpn_rshift (mp_ptr rp, mp_srcptr up, mp_size_t n, unsigned int cnt)
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{
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mp_limb_t high_limb, low_limb;
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unsigned int tnc;
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mp_size_t i;
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mp_limb_t retval;
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ASSERT (n >= 1);
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ASSERT (cnt >= 1);
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ASSERT (cnt < GMP_NUMB_BITS);
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ASSERT (MPN_SAME_OR_INCR_P (rp, up, n));
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tnc = GMP_NUMB_BITS - cnt;
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high_limb = *up++;
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retval = (high_limb << tnc) & GMP_NUMB_MASK;
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low_limb = high_limb >> cnt;
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for (i = n - 1; i != 0; i--)
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{
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high_limb = *up++;
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*rp++ = low_limb | ((high_limb << tnc) & GMP_NUMB_MASK);
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low_limb = high_limb >> cnt;
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}
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*rp = low_limb;
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return retval;
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}
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