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/* Lambda matrix transformations.

   Copyright (C) 2003, 2004 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 2, 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 COPYING.  If not, write to the Free

Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA

02110-1301, USA.  */

#include "config.h"

#include "system.h"

#include "coretypes.h"

#include "tm.h"

#include "ggc.h"

#include "tree.h"

#include "target.h"

#include "varray.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_alloc (sizeof (*ret));

  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));

}