1 /* Lambda matrix transformations. 2 Copyright (C) 2003, 2004 Free Software Foundation, Inc. 3 Contributed by Daniel Berlin <[email protected]>. 4 5 This file is part of GCC. 6 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 2, or (at your option) any later 10 version. 11 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. 16 17 You should have received a copy of the GNU General Public License 18 along with GCC; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #include "config.h" 23 #include "system.h" 24 #include "coretypes.h" 25 #include "tm.h" 26 #include "ggc.h" 27 #include "tree.h" 28 #include "target.h" 29 #include "lambda.h" 30 31 /* Allocate a new transformation matrix. */ 32 33 lambda_trans_matrix 34 lambda_trans_matrix_new (int colsize, int rowsize) 35 { 36 lambda_trans_matrix ret; 37 38 ret = ggc_alloc (sizeof (*ret)); 39 LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize); 40 LTM_ROWSIZE (ret) = rowsize; 41 LTM_COLSIZE (ret) = colsize; 42 LTM_DENOMINATOR (ret) = 1; 43 return ret; 44 } 45 46 /* Return true if MAT is an identity matrix. */ 47 48 bool 49 lambda_trans_matrix_id_p (lambda_trans_matrix mat) 50 { 51 if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat)) 52 return false; 53 return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat)); 54 } 55 56 57 /* Compute the inverse of the transformation matrix MAT. */ 58 59 lambda_trans_matrix 60 lambda_trans_matrix_inverse (lambda_trans_matrix mat) 61 { 62 lambda_trans_matrix inverse; 63 int determinant; 64 65 inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat)); 66 determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse), 67 LTM_ROWSIZE (mat)); 68 LTM_DENOMINATOR (inverse) = determinant; 69 return inverse; 70 } 71 72 73 /* Print out a transformation matrix. */ 74 75 void 76 print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat) 77 { 78 print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat), 79 LTM_COLSIZE (mat)); 80 } 81