58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2009 William Hart
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******************************************************************************/
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#define ulong ulongxx /* interferes with system includes */
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#include <math.h>
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#undef ulong
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#define ulong mp_limb_t
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#include <gmp.h>
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#include "flint.h"
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#include "ulong_extras.h"
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int mod64[64] = {1,1,0,0,1,0,0,0,0,1,0,0,0,0,0,0,1,1,0,0,0,
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0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,1,0,0,0,0,1,
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0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0};
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int mod65[65] = {1,1,0,0,1,0,0,0,0,1,1,0,0,0,1,0,1,0,0,0,0,0,
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0,0,0,1,1,0,0,1,1,0,0,0,0,1,1,0,0,1,1,0,0,0,
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0,0,0,0,0,1,0,1,0,0,0,1,1,0,0,0,0,1,0,0,1};
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int mod63[63] = {1,1,0,0,1,0,0,1,0,1,0,0,0,0,1,0,1,0,1,0,0,
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0,1,0,0,1,0,0,1,0,0,0,0,0,0,1,1,1,0,0,0,0,
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0,1,0,0,1,0,0,1,0,0,0,0,0,0,1,0,1,0,0,0,0};
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int n_is_square(mp_limb_t x)
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{
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mp_limb_t sq;
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if (!mod64[x % UWORD(64)]) return 0;
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if (!mod63[x % UWORD(63)]) return 0;
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if (!mod65[x % UWORD(65)]) return 0;
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sq = (mp_limb_t) (sqrt((double) x) + 0.5);
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return (x == sq*sq);
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}
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