Merge tree-ssa-20020619-branch into mainline.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@81764 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 232 insertions, 0 deletions

diff --git a/libgfortran/m4/reshape.m4 b/libgfortran/m4/reshape.m4
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+`/* Implementation of the RESHAPE
+   Copyright 2002 Free Software Foundation, Inc.
+   Contributed by Paul Brook <paul@nowt.org>
+
+This file is part of the GNU Fortran 95 runtime library (libgfor).
+
+Libgfor is free software; you can redistribute it and/or
+modify it under the terms of the GNU Lesser General Public
+License as published by the Free Software Foundation; either
+version 2.1 of the License, or (at your option) any later version.
+
+Ligbfor 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public
+License along with libgfor; see the file COPYING.LIB.  If not,
+write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include "libgfortran.h"'
+include(types.m4)dnl
+define(rtype_kind, regexp(file, `_.\([0-9]+\)\.', `\1'))dnl
+define(rtype_letter, regexp(file, `_\(.\)[0-9]+\.', `\1'))dnl
+define(rtype_code,rtype_letter`'rtype_name)dnl
+define(rtype,get_arraytype(rtype_letter,rtype_kind))dnl
+define(rtype_name, get_typename(rtype_letter, rtype_kind))dnl
+
+typedef GFC_ARRAY_DESCRIPTOR(1, index_type) shape_type;
+
+/* The shape parameter is ignored. We can currently deduce the shape from the
+   return array.  */
+dnl Only the kind (ie size) is used to name the function.
+void
+`__reshape_'rtype_kind (rtype * ret, rtype * source, shape_type * shape,
+                      rtype * pad, shape_type * order)
+{
+  /* r.* indicates the return array.  */
+  index_type rcount[GFC_MAX_DIMENSIONS - 1];
+  index_type rextent[GFC_MAX_DIMENSIONS - 1];
+  index_type rstride[GFC_MAX_DIMENSIONS - 1];
+  index_type rstride0;
+  index_type rdim;
+  index_type rsize;
+  rtype_name *rptr;
+  /* s.* indicates the source array.  */
+  index_type scount[GFC_MAX_DIMENSIONS - 1];
+  index_type sextent[GFC_MAX_DIMENSIONS - 1];
+  index_type sstride[GFC_MAX_DIMENSIONS - 1];
+  index_type sstride0;
+  index_type sdim;
+  index_type ssize;
+  const rtype_name *sptr;
+  /* p.* indicates the pad array.  */
+  index_type pcount[GFC_MAX_DIMENSIONS - 1];
+  index_type pextent[GFC_MAX_DIMENSIONS - 1];
+  index_type pstride[GFC_MAX_DIMENSIONS - 1];
+  index_type pdim;
+  index_type psize;
+  const rtype_name *pptr;
+
+  const rtype_name *src;
+  int n;
+  int dim;
+
+  if (ret->dim[0].stride == 0)
+    ret->dim[0].stride = 1;
+  if (source->dim[0].stride == 0)
+    source->dim[0].stride = 1;
+  if (shape->dim[0].stride == 0)
+    shape->dim[0].stride = 1;
+  if (pad && pad->dim[0].stride == 0)
+    pad->dim[0].stride = 1;
+  if (order && order->dim[0].stride == 0)
+    order->dim[0].stride = 1;
+
+  rdim = GFC_DESCRIPTOR_RANK (ret);
+  rsize = 1;
+  for (n = 0; n < rdim; n++)
+    {
+      if (order)
+        dim = order->data[n * order->dim[0].stride] - 1;
+      else
+        dim = n;
+
+      rcount[n] = 0;
+      rstride[n] = ret->dim[dim].stride;
+      rextent[n] = ret->dim[dim].ubound + 1 - ret->dim[dim].lbound;
+
+      if (rextent[n] != shape->data[dim * shape->dim[0].stride])
+        runtime_error ("shape and target do not conform");
+
+      if (rsize == rstride[n])
+        rsize *= rextent[n];
+      else
+        rsize = 0;
+      if (rextent[dim] <= 0)
+        return;
+    }
+
+  sdim = GFC_DESCRIPTOR_RANK (source);
+  ssize = 1;
+  for (n = 0; n < sdim; n++)
+    {
+      scount[n] = 0;
+      sstride[n] = source->dim[n].stride;
+      sextent[n] = source->dim[n].ubound + 1 - source->dim[n].lbound;
+      if (sextent[n] <= 0)
+        abort ();
+
+      if (ssize == sstride[n])
+        ssize *= sextent[n];
+      else
+        ssize = 0;
+    }
+
+  if (pad)
+    {
+      if (pad->dim[0].stride == 0)
+        pad->dim[0].stride = 1;
+      pdim = GFC_DESCRIPTOR_RANK (pad);
+      psize = 1;
+      for (n = 0; n < pdim; n++)
+        {
+          pcount[n] = 0;
+          pstride[n] = pad->dim[n].stride;
+          pextent[n] = pad->dim[n].ubound + 1 - pad->dim[n].lbound;
+          if (pextent[n] <= 0)
+            abort ();
+          if (psize == pstride[n])
+            psize *= pextent[n];
+          else
+            psize = 0;
+        }
+      pptr = pad->data;
+    }
+  else
+    {
+      pdim = 0;
+      psize = 1;
+      pptr = NULL;
+    }
+
+  if (rsize != 0 && ssize != 0 && psize != 0)
+    {
+      rsize *= rtype_kind;
+      ssize *= rtype_kind;
+      psize *= rtype_kind;
+      reshape_packed ((char *)ret->data, rsize, (char *)source->data,
+		      ssize, pad ? (char *)pad->data : NULL, psize);
+      return;
+    }
+  rptr = ret->data;
+  src = sptr = source->data;
+  rstride0 = rstride[0];
+  sstride0 = sstride[0];
+
+  while (rptr)
+    {
+      /* Select between the source and pad arrays.  */
+      *rptr = *src;
+      /* Advance to the next element.  */
+      rptr += rstride0;
+      src += sstride0;
+      rcount[0]++;
+      scount[0]++;
+      /* Advance to the next destination element.  */
+      n = 0;
+      while (rcount[n] == rextent[n])
+        {
+          /* When we get to the end of a dimension, reset it and increment
+             the next dimension.  */
+          rcount[n] = 0;
+          /* We could precalculate these products, but this is a less
+             frequently used path so proabably not worth it.  */
+          rptr -= rstride[n] * rextent[n];
+          n++;
+          if (n == rdim)
+            {
+              /* Break out of the loop.  */
+              rptr = NULL;
+              break;
+            }
+          else
+            {
+              rcount[n]++;
+              rptr += rstride[n];
+            }
+        }
+      /* Advance to the next source element.  */
+      n = 0;
+      while (scount[n] == sextent[n])
+        {
+          /* When we get to the end of a dimension, reset it and increment
+             the next dimension.  */
+          scount[n] = 0;
+          /* We could precalculate these products, but this is a less
+             frequently used path so proabably not worth it.  */
+          src -= sstride[n] * sextent[n];
+          n++;
+          if (n == sdim)
+            {
+              if (sptr && pad)
+                {
+                  /* Switch to the pad array.  */
+                  sptr = NULL;
+                  sdim = pdim;
+                  for (dim = 0; dim < pdim; dim++)
+                    {
+                      scount[dim] = pcount[dim];
+                      sextent[dim] = pextent[dim];
+                      sstride[dim] = pstride[dim];
+                      sstride0 = sstride[0];
+                    }
+                }
+              /* We now start again from the beginning of the pad array.  */
+              src = pptr;
+              break;
+            }
+          else
+            {
+              scount[n]++;
+              src += sstride[n];
+            }
+        }
+    }
+}
+