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.
104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
/* mpn_divrem -- Divide natural numbers, producing both remainder and
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quotient. This is now just a middle layer calling mpn_tdiv_qr.
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Copyright 1993-1997, 1999-2002, 2005, 2016 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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#include "longlong.h"
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mp_limb_t
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mpn_divrem (mp_ptr qp, mp_size_t qxn,
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mp_ptr np, mp_size_t nn,
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mp_srcptr dp, mp_size_t dn)
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{
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ASSERT (qxn >= 0);
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ASSERT (nn >= dn);
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ASSERT (dn >= 1);
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ASSERT (dp[dn-1] & GMP_NUMB_HIGHBIT);
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ASSERT (! MPN_OVERLAP_P (np, nn, dp, dn));
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ASSERT (! MPN_OVERLAP_P (qp, nn-dn+qxn, np, nn) || qp==np+dn+qxn);
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ASSERT (! MPN_OVERLAP_P (qp, nn-dn+qxn, dp, dn));
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ASSERT_MPN (np, nn);
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ASSERT_MPN (dp, dn);
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if (dn == 1)
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{
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mp_limb_t ret;
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mp_ptr q2p;
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mp_size_t qn;
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TMP_DECL;
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TMP_MARK;
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q2p = TMP_ALLOC_LIMBS (nn + qxn);
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np[0] = mpn_divrem_1 (q2p, qxn, np, nn, dp[0]);
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qn = nn + qxn - 1;
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MPN_COPY (qp, q2p, qn);
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ret = q2p[qn];
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TMP_FREE;
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return ret;
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}
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else if (dn == 2)
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{
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return mpn_divrem_2 (qp, qxn, np, nn, dp);
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}
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else
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{
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mp_ptr q2p;
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mp_limb_t qhl;
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mp_size_t qn;
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TMP_DECL;
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TMP_MARK;
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if (UNLIKELY (qxn != 0))
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{
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mp_ptr n2p;
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TMP_ALLOC_LIMBS_2 (n2p, nn + qxn,
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q2p, nn - dn + qxn + 1);
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MPN_ZERO (n2p, qxn);
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MPN_COPY (n2p + qxn, np, nn);
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mpn_tdiv_qr (q2p, np, 0L, n2p, nn + qxn, dp, dn);
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qn = nn - dn + qxn;
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MPN_COPY (qp, q2p, qn);
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qhl = q2p[qn];
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}
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else
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{
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q2p = TMP_ALLOC_LIMBS (nn - dn + 1);
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mpn_tdiv_qr (q2p, np, 0L, np, nn, dp, dn);
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qn = nn - dn;
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MPN_COPY (qp, q2p, qn);
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qhl = q2p[qn];
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}
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TMP_FREE;
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return qhl;
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}
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}
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