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/*=============================================================================
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) 2010,2011 Fredrik Johansson
Copyright (C) 2013 Mike Hansen
******************************************************************************/
#ifdef T
#include "templates.h"
void
TEMPLATE(T, mat_solve_tril_recursive) (TEMPLATE(T, mat_t) X,
const TEMPLATE(T, mat_t) L,
const TEMPLATE(T, mat_t) B,
int unit, const TEMPLATE(T, ctx_t) ctx)
{
TEMPLATE(T, mat_t) LA, LC, LD, XX, XY, BX, BY;
slong r, n, m;
n = L->r;
m = B->c;
r = n / 2;
if (n == 0 || m == 0)
return;
/*
Denoting inv(M) by M^, we have:
[A 0]^ [X] == [A^ 0 ] [X] == [A^ X]
[C D] [Y] == [-D^ C A^ D^] [Y] == [D^ (Y - C A^ X)]
*/
TEMPLATE(T, mat_window_init) (LA, L, 0, 0, r, r, ctx);
TEMPLATE(T, mat_window_init) (LC, L, r, 0, n, r, ctx);
TEMPLATE(T, mat_window_init) (LD, L, r, r, n, n, ctx);
TEMPLATE(T, mat_window_init) (BX, B, 0, 0, r, m, ctx);
TEMPLATE(T, mat_window_init) (BY, B, r, 0, n, m, ctx);
TEMPLATE(T, mat_window_init) (XX, X, 0, 0, r, m, ctx);
TEMPLATE(T, mat_window_init) (XY, X, r, 0, n, m, ctx);
TEMPLATE(T, mat_solve_tril) (XX, LA, BX, unit, ctx);
TEMPLATE(T, mat_submul) (XY, BY, LC, XX, ctx);
TEMPLATE(T, mat_solve_tril) (XY, LD, XY, unit, ctx);
TEMPLATE(T, mat_window_clear) (LA, ctx);
TEMPLATE(T, mat_window_clear) (LC, ctx);
TEMPLATE(T, mat_window_clear) (LD, ctx);
TEMPLATE(T, mat_window_clear) (BX, ctx);
TEMPLATE(T, mat_window_clear) (BY, ctx);
TEMPLATE(T, mat_window_clear) (XX, ctx);
TEMPLATE(T, mat_window_clear) (XY, ctx);
}
#endif
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