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1 /* Lambda matrix transformations.
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2 Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
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3 Contributed by Daniel Berlin <dberlin@dberlin.org>.
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it under
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8 the terms of the GNU General Public License as published by the Free
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9 Software Foundation; either version 3, or (at your option) any later
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10 version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #include "config.h"
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22 #include "system.h"
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23 #include "coretypes.h"
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24 #include "tm.h"
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25 #include "ggc.h"
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26 #include "tree.h"
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27 #include "target.h"
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28 #include "tree-flow.h"
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29 #include "lambda.h"
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30
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31 /* Allocate a new transformation matrix. */
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32
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33 lambda_trans_matrix
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34 lambda_trans_matrix_new (int colsize, int rowsize)
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35 {
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36 lambda_trans_matrix ret;
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37
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38 ret = GGC_NEW (struct lambda_trans_matrix_s);
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39 LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize);
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40 LTM_ROWSIZE (ret) = rowsize;
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41 LTM_COLSIZE (ret) = colsize;
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42 LTM_DENOMINATOR (ret) = 1;
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43 return ret;
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44 }
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45
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46 /* Return true if MAT is an identity matrix. */
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47
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48 bool
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49 lambda_trans_matrix_id_p (lambda_trans_matrix mat)
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50 {
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51 if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
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52 return false;
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53 return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
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54 }
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55
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56
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57 /* Compute the inverse of the transformation matrix MAT. */
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58
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59 lambda_trans_matrix
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60 lambda_trans_matrix_inverse (lambda_trans_matrix mat)
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61 {
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62 lambda_trans_matrix inverse;
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63 int determinant;
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64
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65 inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat));
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66 determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse),
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67 LTM_ROWSIZE (mat));
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68 LTM_DENOMINATOR (inverse) = determinant;
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69 return inverse;
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70 }
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71
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72
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73 /* Print out a transformation matrix. */
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74
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75 void
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76 print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
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77 {
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78 print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat),
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79 LTM_COLSIZE (mat));
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80 }
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