49 lines
1.5 KiB
C
49 lines
1.5 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) 2010 William Hart
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******************************************************************************/
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#include <stdlib.h>
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#include <gmp.h>
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#include "flint.h"
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#include "nmod_vec.h"
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mp_bitcnt_t _nmod_vec_max_bits(mp_srcptr vec, slong len)
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{
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mp_bitcnt_t bits = 0;
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mp_limb_t mask = ~(mp_limb_t) 0;
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slong i;
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for (i = 0; i < len; i++)
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{
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if (vec[i] & mask)
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{
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bits = FLINT_BIT_COUNT(vec[i]);
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if (bits == FLINT_BITS) break;
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else mask = ~(mp_limb_t) 0 - ((UWORD(1) << bits) - UWORD(1));
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}
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}
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return bits;
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}
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