pqc/external/flint-2.4.3/fmpz_mat/randsimdioph.c
2014-05-24 23:16:06 +02:00

57 lines
1.9 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2005-2009 Damien Stehle
Copyright (C) 2007 David Cade
Copyright (C) 2010 William Hart
******************************************************************************/
#include "fmpz_mat.h"
void
fmpz_mat_randsimdioph(fmpz_mat_t mat, flint_rand_t state, mp_bitcnt_t bits, mp_bitcnt_t bits2)
{
const slong c = mat->c, r = mat->r;
slong i, j;
if (c != r)
{
flint_printf("Exception (fmpz_mat_randsimdioph). Ill-formed matrix.\n");
abort();
}
fmpz_one(mat->rows[0]);
fmpz_mul_2exp(mat->rows[0], mat->rows[0], bits2);
for (j = 1; j < c; j++)
fmpz_randbits(mat->rows[0] + j, state, bits);
for (i = 1; i < r; i++)
{
for (j = 0; j < i; j++)
fmpz_zero(mat->rows[i] + j);
fmpz_one(mat->rows[i] + i);
fmpz_mul_2exp(mat->rows[i] + i, mat->rows[i] + i, bits);
for (j = i + 1; j < c; j++)
fmpz_zero(mat->rows[i] + j);
}
}