| /* 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) |

| { |

| lambda_trans_matrix ret; |

| |

| ret = GGC_NEW (struct lambda_trans_matrix_s); |

| LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize); |

| 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) |

| { |

| lambda_trans_matrix inverse; |

| int determinant; |

| |

| inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat)); |

| determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse), |

| LTM_ROWSIZE (mat)); |

| 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)); |

| } |