85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
/* Lambda matrix transformations.
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Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc.
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Contributed by Daniel Berlin <dberlin@dberlin.org>.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "ggc.h"
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#include "tree.h"
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#include "target.h"
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#include "tree-flow.h"
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#include "lambda.h"
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/* Allocate a new transformation matrix. */
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lambda_trans_matrix
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lambda_trans_matrix_new (int colsize, int rowsize,
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struct obstack * lambda_obstack)
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{
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lambda_trans_matrix ret;
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ret = (lambda_trans_matrix)
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obstack_alloc (lambda_obstack, sizeof (struct lambda_trans_matrix_s));
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LTM_MATRIX (ret) = lambda_matrix_new (rowsize, colsize, lambda_obstack);
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LTM_ROWSIZE (ret) = rowsize;
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LTM_COLSIZE (ret) = colsize;
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LTM_DENOMINATOR (ret) = 1;
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return ret;
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}
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/* Return true if MAT is an identity matrix. */
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bool
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lambda_trans_matrix_id_p (lambda_trans_matrix mat)
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{
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if (LTM_ROWSIZE (mat) != LTM_COLSIZE (mat))
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return false;
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return lambda_matrix_id_p (LTM_MATRIX (mat), LTM_ROWSIZE (mat));
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}
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/* Compute the inverse of the transformation matrix MAT. */
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lambda_trans_matrix
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lambda_trans_matrix_inverse (lambda_trans_matrix mat,
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struct obstack * lambda_obstack)
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{
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lambda_trans_matrix inverse;
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int determinant;
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inverse = lambda_trans_matrix_new (LTM_ROWSIZE (mat), LTM_COLSIZE (mat),
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lambda_obstack);
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determinant = lambda_matrix_inverse (LTM_MATRIX (mat), LTM_MATRIX (inverse),
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LTM_ROWSIZE (mat), lambda_obstack);
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LTM_DENOMINATOR (inverse) = determinant;
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return inverse;
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}
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/* Print out a transformation matrix. */
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void
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print_lambda_trans_matrix (FILE *outfile, lambda_trans_matrix mat)
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{
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print_lambda_matrix (outfile, LTM_MATRIX (mat), LTM_ROWSIZE (mat),
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LTM_COLSIZE (mat));
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}
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