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[official-gcc.git] / gcc / lambda-trans.c
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1 /* Lambda matrix transformations.
2 Copyright (C) 2003, 2004, 2007 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
10 version.
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
15 for more details.
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/>. */
21 #include "config.h"
22 #include "system.h"
23 #include "coretypes.h"
24 #include "tm.h"
25 #include "ggc.h"
26 #include "tree.h"
27 #include "target.h"
28 #include "lambda.h"
30 /* Allocate a new transformation matrix. */
32 lambda_trans_matrix
33 lambda_trans_matrix_new (int colsize, int rowsize)
35 lambda_trans_matrix ret;
37 ret = GGC_NEW (struct lambda_trans_matrix_s);
38 LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize);
39 LTM_ROWSIZE (ret) = rowsize;
40 LTM_COLSIZE (ret) = colsize;
41 LTM_DENOMINATOR (ret) = 1;
42 return ret;
45 /* Return true if MAT is an identity matrix. */
47 bool
48 lambda_trans_matrix_id_p (lambda_trans_matrix mat)
50 if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
51 return false;
52 return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
56 /* Compute the inverse of the transformation matrix MAT. */
58 lambda_trans_matrix
59 lambda_trans_matrix_inverse (lambda_trans_matrix mat)
61 lambda_trans_matrix inverse;
62 int determinant;
64 inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat));
65 determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse),
66 LTM_ROWSIZE (mat));
67 LTM_DENOMINATOR (inverse) = determinant;
68 return inverse;
72 /* Print out a transformation matrix. */
74 void
75 print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
77 print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat),
78 LTM_COLSIZE (mat));