mirror of
https://github.com/vale981/arb
synced 2025-03-04 17:01:40 -05:00
6bf072eb59
This will allow us to not loose the julia session on error. See also https://github.com/wbhart/flint2/pull/243
72 lines
1.5 KiB
C
72 lines
1.5 KiB
C
/*
|
|
Copyright (C) 2016 Arb authors
|
|
|
|
This file is part of Arb.
|
|
|
|
Arb is free software: you can redistribute it and/or modify it under
|
|
the terms of the GNU Lesser General Public License (LGPL) as published
|
|
by the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version. See <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "bool_mat.h"
|
|
|
|
void
|
|
bool_mat_pow_ui(bool_mat_t B, const bool_mat_t A, ulong exp)
|
|
{
|
|
slong d;
|
|
|
|
if (!bool_mat_is_square(A))
|
|
{
|
|
flint_printf("bool_mat_pow_ui: a square matrix is required!\n");
|
|
flint_abort();
|
|
}
|
|
|
|
if (bool_mat_is_empty(A))
|
|
return;
|
|
|
|
d = bool_mat_nrows(A);
|
|
|
|
if (exp <= 2 || d <= 1)
|
|
{
|
|
if (exp == 0)
|
|
{
|
|
bool_mat_one(B);
|
|
}
|
|
else if (d == 1)
|
|
{
|
|
bool_mat_set_entry(B, 0, 0, bool_mat_get_entry(A, 0, 0));
|
|
}
|
|
else if (exp == 1)
|
|
{
|
|
bool_mat_set(B, A);
|
|
}
|
|
else if (exp == 2)
|
|
{
|
|
bool_mat_sqr(B, A);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
slong i;
|
|
bool_mat_t T, U;
|
|
|
|
bool_mat_init(T, d, d);
|
|
bool_mat_set(T, A);
|
|
bool_mat_init(U, d, d);
|
|
|
|
for (i = ((slong) FLINT_BIT_COUNT(exp)) - 2; i >= 0; i--)
|
|
{
|
|
bool_mat_sqr(U, T);
|
|
|
|
if (exp & (WORD(1) << i))
|
|
bool_mat_mul(T, U, A);
|
|
else
|
|
bool_mat_swap(T, U);
|
|
}
|
|
|
|
bool_mat_swap(B, T);
|
|
bool_mat_clear(T);
|
|
bool_mat_clear(U);
|
|
}
|
|
}
|