gcc/lambda-trans.c

   1 /* Lambda matrix transformations.
   2    Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
   3    Contributed by Daniel Berlin <dberlin@dberlin.org>.
   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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  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 "tree-flow.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                          struct obstack * lambda_obstack)
  36 {
  37   lambda_trans_matrix ret;
  38
  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;
  45   return ret;
  46 }
  47
  48 /* Return true if MAT is an identity matrix.  */
  49
  50 bool
  51 lambda_trans_matrix_id_p (lambda_trans_matrix mat)
  52 {
  53   if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
  54     return false;
  55   return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
  56 }
  57
  58
  59 /* Compute the inverse of the transformation matrix MAT.  */
  60
  61 lambda_trans_matrix
  62 lambda_trans_matrix_inverse (lambda_trans_matrix mat,
  63                              struct obstack * lambda_obstack)
  64 {
  65   lambda_trans_matrix inverse;
  66   int determinant;
  67
  68   inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat),
  69                                      lambda_obstack);
  70   determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse),
  71                                        LTM_ROWSIZE (mat), lambda_obstack);
  72   LTM_DENOMINATOR (inverse) = determinant;
  73   return inverse;
  74 }
  75
  76
  77 /* Print out a transformation matrix.  */
  78
  79 void
  80 print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
  81 {
  82   print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat),
  83                        LTM_COLSIZE (mat));
  84 }