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Release calc version 2.11.0t10.5.1
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37
zmod.c
37
zmod.c
@@ -1,35 +1,8 @@
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/*
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* zmod - modulo arithmetic routines
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* Copyright (c) 1997 David I. Bell
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* Permission is granted to use, distribute, or modify this source,
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* provided that this copyright notice remains intact.
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*
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* Copyright (C) 1999 David I. Bell, Landon Curt Noll and Ernest Bowen
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*
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* Primary author: David I. Bell
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*
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* Calc is open software; you can redistribute it and/or modify it under
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* the terms of the version 2.1 of the GNU Lesser General Public License
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* as published by the Free Software Foundation.
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*
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* Calc is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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* Public License for more details.
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*
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* A copy of version 2.1 of the GNU Lesser General Public License is
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* distributed with calc under the filename COPYING-LGPL. You should have
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* received a copy with calc; if not, write to Free Software Foundation, Inc.
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
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*
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* @(#) $Revision: 29.1 $
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* @(#) $Id: zmod.c,v 29.1 1999/12/14 09:16:17 chongo Exp $
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* @(#) $Source: /usr/local/src/cmd/calc/RCS/zmod.c,v $
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*
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* Under source code control: 1991/05/22 23:03:55
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* File existed as early as: 1991
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*
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* Share and enjoy! :-) http://reality.sgi.com/chongo/tech/comp/calc/
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*/
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/*
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* Routines to do modulo arithmetic both normally and also using the REDC
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* algorithm given by Peter L. Montgomery in Mathematics of Computation,
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* volume 44, number 170 (April, 1985). For multiple multiplies using
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@@ -1877,7 +1850,7 @@ zredcpower(REDC *rp, ZVALUE z1, ZVALUE z2, ZVALUE *res)
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*
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* Therefore, v mod h*2^n+r == (2^n)*(b mod h) + a - r*int(b/h).
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*
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* The above proof leads to the following calc resource file which computes
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* The above proof leads to the following calc script which computes
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* the value z mod h*2^n+r:
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*
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* define hnrmod(v,h,n,r)
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@@ -1945,7 +1918,7 @@ zredcpower(REDC *rp, ZVALUE z1, ZVALUE z2, ZVALUE *res)
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* return ret;
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* }
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*
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* This function implements the above calc resource file.
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* This function implements the above calc script.
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*
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* given:
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* v take mod of this value, v >= 0
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