1 /* Lambda matrix transformations.
2 Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
3 Contributed by Daniel Berlin <dberlin@dberlin.org>.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
28 #include "tree-flow.h"
31 /* Allocate a new transformation matrix. */
34 lambda_trans_matrix_new (int colsize, int rowsize,
35 struct obstack * lambda_obstack)
37 lambda_trans_matrix ret;
39 ret = (lambda_trans_matrix)
40 obstack_alloc (lambda_obstack, sizeof (struct lambda_trans_matrix_s));
41 LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize, lambda_obstack);
42 LTM_ROWSIZE (ret) = rowsize;
43 LTM_COLSIZE (ret) = colsize;
44 LTM_DENOMINATOR (ret) = 1;
48 /* Return true if MAT is an identity matrix. */
51 lambda_trans_matrix_id_p (lambda_trans_matrix mat)
53 if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
55 return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
59 /* Compute the inverse of the transformation matrix MAT. */
62 lambda_trans_matrix_inverse (lambda_trans_matrix mat,
63 struct obstack * lambda_obstack)
65 lambda_trans_matrix inverse;
68 inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat),
70 determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse),
71 LTM_ROWSIZE (mat), lambda_obstack);
72 LTM_DENOMINATOR (inverse) = determinant;
77 /* Print out a transformation matrix. */
80 print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
82 print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat),