mirror of https://github.com/macssh/macssh.git
70 lines
2.0 KiB
C
Executable File
70 lines
2.0 KiB
C
Executable File
/* mpn_preinv_mod_1 (dividend_ptr, dividend_size, divisor_limb,
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divisor_limb_inverted) --
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Divide (DIVIDEND_PTR,,DIVIDEND_SIZE) by the normalized DIVISOR_LIMB.
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DIVISOR_LIMB_INVERTED should be 2^(2*BITS_PER_MP_LIMB) / DIVISOR_LIMB +
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- 2^BITS_PER_MP_LIMB.
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Return the single-limb remainder.
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Copyright (C) 1991, 1993, 1994, 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 the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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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 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 MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "longlong.h"
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#ifndef UMUL_TIME
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#define UMUL_TIME 1
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#endif
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#ifndef UDIV_TIME
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#define UDIV_TIME UMUL_TIME
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#endif
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mp_limb_t
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#if __STDC__
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mpn_preinv_mod_1 (mp_srcptr dividend_ptr, mp_size_t dividend_size,
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mp_limb_t divisor_limb, mp_limb_t divisor_limb_inverted)
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#else
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mpn_preinv_mod_1 (dividend_ptr, dividend_size, divisor_limb, divisor_limb_inverted)
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mp_srcptr dividend_ptr;
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mp_size_t dividend_size;
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mp_limb_t divisor_limb;
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mp_limb_t divisor_limb_inverted;
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#endif
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{
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mp_size_t i;
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mp_limb_t n0, r;
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int dummy;
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i = dividend_size - 1;
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r = dividend_ptr[i];
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if (r >= divisor_limb)
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r = 0;
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else
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i--;
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for (; i >= 0; i--)
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{
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n0 = dividend_ptr[i];
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udiv_qrnnd_preinv (dummy, r, r, n0, divisor_limb, divisor_limb_inverted);
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}
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return r;
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}
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