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/* Lambda matrix transformations.
Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
Contributed by Daniel Berlin <dberlin@dberlin.org>.
This file is part of GCC.
GCC 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 3, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "ggc.h"
#include "tree.h"
#include "target.h"
#include "tree-flow.h"
#include "lambda.h"
/* Allocate a new transformation matrix. */
lambda_trans_matrix
lambda_trans_matrix_new (int colsize, int rowsize,
struct obstack * lambda_obstack)
{
lambda_trans_matrix ret;
ret = (lambda_trans_matrix)
obstack_alloc (lambda_obstack, sizeof (struct lambda_trans_matrix_s));
LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize, lambda_obstack);
LTM_ROWSIZE (ret) = rowsize;
LTM_COLSIZE (ret) = colsize;
LTM_DENOMINATOR (ret) = 1;
return ret;
}
/* Return true if MAT is an identity matrix. */
bool
lambda_trans_matrix_id_p (lambda_trans_matrix mat)
{
if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
return false;
return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
}
/* Compute the inverse of the transformation matrix MAT. */
lambda_trans_matrix
lambda_trans_matrix_inverse (lambda_trans_matrix mat,
struct obstack * lambda_obstack)
{
lambda_trans_matrix inverse;
int determinant;
inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat),
lambda_obstack);
determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse),
LTM_ROWSIZE (mat), lambda_obstack);
LTM_DENOMINATOR (inverse) = determinant;
return inverse;
}
/* Print out a transformation matrix. */
void
print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
{
print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat),
LTM_COLSIZE (mat));
}
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