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/* Implementation of the SUM intrinsic
/* Implementation of the SUM intrinsic
   Copyright 2002, 2007, 2009 Free Software Foundation, Inc.
   Copyright 2002, 2007, 2009 Free Software Foundation, Inc.
   Contributed by Paul Brook <paul@nowt.org>
   Contributed by Paul Brook <paul@nowt.org>
 
 
This file is part of the GNU Fortran 95 runtime library (libgfortran).
This file is part of the GNU Fortran 95 runtime library (libgfortran).
 
 
Libgfortran is free software; you can redistribute it and/or
Libgfortran is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public
modify it under the terms of the GNU General Public
License as published by the Free Software Foundation; either
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
version 3 of the License, or (at your option) any later version.
 
 
Libgfortran is distributed in the hope that it will be useful,
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
GNU General Public License for more details.
 
 
Under Section 7 of GPL version 3, you are granted additional
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
3.1, as published by the Free Software Foundation.
 
 
You should have received a copy of the GNU General Public License and
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */
<http://www.gnu.org/licenses/>.  */
 
 
#include "libgfortran.h"
#include "libgfortran.h"
#include <stdlib.h>
#include <stdlib.h>
#include <assert.h>
#include <assert.h>
 
 
 
 
#if defined (HAVE_GFC_INTEGER_16) && defined (HAVE_GFC_INTEGER_16)
#if defined (HAVE_GFC_INTEGER_16) && defined (HAVE_GFC_INTEGER_16)
 
 
 
 
extern void sum_i16 (gfc_array_i16 * const restrict,
extern void sum_i16 (gfc_array_i16 * const restrict,
        gfc_array_i16 * const restrict, const index_type * const restrict);
        gfc_array_i16 * const restrict, const index_type * const restrict);
export_proto(sum_i16);
export_proto(sum_i16);
 
 
void
void
sum_i16 (gfc_array_i16 * const restrict retarray,
sum_i16 (gfc_array_i16 * const restrict retarray,
        gfc_array_i16 * const restrict array,
        gfc_array_i16 * const restrict array,
        const index_type * const restrict pdim)
        const index_type * const restrict pdim)
{
{
  index_type count[GFC_MAX_DIMENSIONS];
  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type dstride[GFC_MAX_DIMENSIONS];
  index_type dstride[GFC_MAX_DIMENSIONS];
  const GFC_INTEGER_16 * restrict base;
  const GFC_INTEGER_16 * restrict base;
  GFC_INTEGER_16 * restrict dest;
  GFC_INTEGER_16 * restrict dest;
  index_type rank;
  index_type rank;
  index_type n;
  index_type n;
  index_type len;
  index_type len;
  index_type delta;
  index_type delta;
  index_type dim;
  index_type dim;
  int continue_loop;
  int continue_loop;
 
 
  /* Make dim zero based to avoid confusion.  */
  /* Make dim zero based to avoid confusion.  */
  dim = (*pdim) - 1;
  dim = (*pdim) - 1;
  rank = GFC_DESCRIPTOR_RANK (array) - 1;
  rank = GFC_DESCRIPTOR_RANK (array) - 1;
 
 
  len = GFC_DESCRIPTOR_EXTENT(array,dim);
  len = GFC_DESCRIPTOR_EXTENT(array,dim);
  if (len < 0)
  if (len < 0)
    len = 0;
    len = 0;
  delta = GFC_DESCRIPTOR_STRIDE(array,dim);
  delta = GFC_DESCRIPTOR_STRIDE(array,dim);
 
 
  for (n = 0; n < dim; n++)
  for (n = 0; n < dim; n++)
    {
    {
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
 
 
      if (extent[n] < 0)
      if (extent[n] < 0)
        extent[n] = 0;
        extent[n] = 0;
    }
    }
  for (n = dim; n < rank; n++)
  for (n = dim; n < rank; n++)
    {
    {
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array, n + 1);
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array, n + 1);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array, n + 1);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array, n + 1);
 
 
      if (extent[n] < 0)
      if (extent[n] < 0)
        extent[n] = 0;
        extent[n] = 0;
    }
    }
 
 
  if (retarray->data == NULL)
  if (retarray->data == NULL)
    {
    {
      size_t alloc_size, str;
      size_t alloc_size, str;
 
 
      for (n = 0; n < rank; n++)
      for (n = 0; n < rank; n++)
        {
        {
          if (n == 0)
          if (n == 0)
            str = 1;
            str = 1;
          else
          else
            str = GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
            str = GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
 
 
          GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
          GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
 
 
        }
        }
 
 
      retarray->offset = 0;
      retarray->offset = 0;
      retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
      retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 
 
      alloc_size = sizeof (GFC_INTEGER_16) * GFC_DESCRIPTOR_STRIDE(retarray,rank-1)
      alloc_size = sizeof (GFC_INTEGER_16) * GFC_DESCRIPTOR_STRIDE(retarray,rank-1)
                   * extent[rank-1];
                   * extent[rank-1];
 
 
      retarray->data = internal_malloc_size (alloc_size);
      retarray->data = internal_malloc_size (alloc_size);
      if (alloc_size == 0)
      if (alloc_size == 0)
        {
        {
          /* Make sure we have a zero-sized array.  */
          /* Make sure we have a zero-sized array.  */
          GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
          GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
          return;
          return;
 
 
        }
        }
    }
    }
  else
  else
    {
    {
      if (rank != GFC_DESCRIPTOR_RANK (retarray))
      if (rank != GFC_DESCRIPTOR_RANK (retarray))
        runtime_error ("rank of return array incorrect in"
        runtime_error ("rank of return array incorrect in"
                       " SUM intrinsic: is %ld, should be %ld",
                       " SUM intrinsic: is %ld, should be %ld",
                       (long int) (GFC_DESCRIPTOR_RANK (retarray)),
                       (long int) (GFC_DESCRIPTOR_RANK (retarray)),
                       (long int) rank);
                       (long int) rank);
 
 
      if (unlikely (compile_options.bounds_check))
      if (unlikely (compile_options.bounds_check))
        bounds_ifunction_return ((array_t *) retarray, extent,
        bounds_ifunction_return ((array_t *) retarray, extent,
                                 "return value", "SUM");
                                 "return value", "SUM");
    }
    }
 
 
  for (n = 0; n < rank; n++)
  for (n = 0; n < rank; n++)
    {
    {
      count[n] = 0;
      count[n] = 0;
      dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
      dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
      if (extent[n] <= 0)
      if (extent[n] <= 0)
        return;
        return;
    }
    }
 
 
  base = array->data;
  base = array->data;
  dest = retarray->data;
  dest = retarray->data;
 
 
  continue_loop = 1;
  continue_loop = 1;
  while (continue_loop)
  while (continue_loop)
    {
    {
      const GFC_INTEGER_16 * restrict src;
      const GFC_INTEGER_16 * restrict src;
      GFC_INTEGER_16 result;
      GFC_INTEGER_16 result;
      src = base;
      src = base;
      {
      {
 
 
  result = 0;
  result = 0;
        if (len <= 0)
        if (len <= 0)
          *dest = 0;
          *dest = 0;
        else
        else
          {
          {
            for (n = 0; n < len; n++, src += delta)
            for (n = 0; n < len; n++, src += delta)
              {
              {
 
 
  result += *src;
  result += *src;
              }
              }
 
 
            *dest = result;
            *dest = result;
          }
          }
      }
      }
      /* Advance to the next element.  */
      /* Advance to the next element.  */
      count[0]++;
      count[0]++;
      base += sstride[0];
      base += sstride[0];
      dest += dstride[0];
      dest += dstride[0];
      n = 0;
      n = 0;
      while (count[n] == extent[n])
      while (count[n] == extent[n])
        {
        {
          /* When we get to the end of a dimension, reset it and increment
          /* When we get to the end of a dimension, reset it and increment
             the next dimension.  */
             the next dimension.  */
          count[n] = 0;
          count[n] = 0;
          /* We could precalculate these products, but this is a less
          /* We could precalculate these products, but this is a less
             frequently used path so probably not worth it.  */
             frequently used path so probably not worth it.  */
          base -= sstride[n] * extent[n];
          base -= sstride[n] * extent[n];
          dest -= dstride[n] * extent[n];
          dest -= dstride[n] * extent[n];
          n++;
          n++;
          if (n == rank)
          if (n == rank)
            {
            {
              /* Break out of the look.  */
              /* Break out of the look.  */
              continue_loop = 0;
              continue_loop = 0;
              break;
              break;
            }
            }
          else
          else
            {
            {
              count[n]++;
              count[n]++;
              base += sstride[n];
              base += sstride[n];
              dest += dstride[n];
              dest += dstride[n];
            }
            }
        }
        }
    }
    }
}
}
 
 
 
 
extern void msum_i16 (gfc_array_i16 * const restrict,
extern void msum_i16 (gfc_array_i16 * const restrict,
        gfc_array_i16 * const restrict, const index_type * const restrict,
        gfc_array_i16 * const restrict, const index_type * const restrict,
        gfc_array_l1 * const restrict);
        gfc_array_l1 * const restrict);
export_proto(msum_i16);
export_proto(msum_i16);
 
 
void
void
msum_i16 (gfc_array_i16 * const restrict retarray,
msum_i16 (gfc_array_i16 * const restrict retarray,
        gfc_array_i16 * const restrict array,
        gfc_array_i16 * const restrict array,
        const index_type * const restrict pdim,
        const index_type * const restrict pdim,
        gfc_array_l1 * const restrict mask)
        gfc_array_l1 * const restrict mask)
{
{
  index_type count[GFC_MAX_DIMENSIONS];
  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type dstride[GFC_MAX_DIMENSIONS];
  index_type dstride[GFC_MAX_DIMENSIONS];
  index_type mstride[GFC_MAX_DIMENSIONS];
  index_type mstride[GFC_MAX_DIMENSIONS];
  GFC_INTEGER_16 * restrict dest;
  GFC_INTEGER_16 * restrict dest;
  const GFC_INTEGER_16 * restrict base;
  const GFC_INTEGER_16 * restrict base;
  const GFC_LOGICAL_1 * restrict mbase;
  const GFC_LOGICAL_1 * restrict mbase;
  int rank;
  int rank;
  int dim;
  int dim;
  index_type n;
  index_type n;
  index_type len;
  index_type len;
  index_type delta;
  index_type delta;
  index_type mdelta;
  index_type mdelta;
  int mask_kind;
  int mask_kind;
 
 
  dim = (*pdim) - 1;
  dim = (*pdim) - 1;
  rank = GFC_DESCRIPTOR_RANK (array) - 1;
  rank = GFC_DESCRIPTOR_RANK (array) - 1;
 
 
  len = GFC_DESCRIPTOR_EXTENT(array,dim);
  len = GFC_DESCRIPTOR_EXTENT(array,dim);
  if (len <= 0)
  if (len <= 0)
    return;
    return;
 
 
  mbase = mask->data;
  mbase = mask->data;
 
 
  mask_kind = GFC_DESCRIPTOR_SIZE (mask);
  mask_kind = GFC_DESCRIPTOR_SIZE (mask);
 
 
  if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
  if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
#ifdef HAVE_GFC_LOGICAL_16
#ifdef HAVE_GFC_LOGICAL_16
      || mask_kind == 16
      || mask_kind == 16
#endif
#endif
      )
      )
    mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
    mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
  else
  else
    runtime_error ("Funny sized logical array");
    runtime_error ("Funny sized logical array");
 
 
  delta = GFC_DESCRIPTOR_STRIDE(array,dim);
  delta = GFC_DESCRIPTOR_STRIDE(array,dim);
  mdelta = GFC_DESCRIPTOR_STRIDE_BYTES(mask,dim);
  mdelta = GFC_DESCRIPTOR_STRIDE_BYTES(mask,dim);
 
 
  for (n = 0; n < dim; n++)
  for (n = 0; n < dim; n++)
    {
    {
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n);
      mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
      mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask,n);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
 
 
      if (extent[n] < 0)
      if (extent[n] < 0)
        extent[n] = 0;
        extent[n] = 0;
 
 
    }
    }
  for (n = dim; n < rank; n++)
  for (n = dim; n < rank; n++)
    {
    {
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n + 1);
      sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n + 1);
      mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask, n + 1);
      mstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(mask, n + 1);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array, n + 1);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array, n + 1);
 
 
      if (extent[n] < 0)
      if (extent[n] < 0)
        extent[n] = 0;
        extent[n] = 0;
    }
    }
 
 
  if (retarray->data == NULL)
  if (retarray->data == NULL)
    {
    {
      size_t alloc_size, str;
      size_t alloc_size, str;
 
 
      for (n = 0; n < rank; n++)
      for (n = 0; n < rank; n++)
        {
        {
          if (n == 0)
          if (n == 0)
            str = 1;
            str = 1;
          else
          else
            str= GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
            str= GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
 
 
          GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
          GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
 
 
        }
        }
 
 
      alloc_size = sizeof (GFC_INTEGER_16) * GFC_DESCRIPTOR_STRIDE(retarray,rank-1)
      alloc_size = sizeof (GFC_INTEGER_16) * GFC_DESCRIPTOR_STRIDE(retarray,rank-1)
                   * extent[rank-1];
                   * extent[rank-1];
 
 
      retarray->offset = 0;
      retarray->offset = 0;
      retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
      retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 
 
      if (alloc_size == 0)
      if (alloc_size == 0)
        {
        {
          /* Make sure we have a zero-sized array.  */
          /* Make sure we have a zero-sized array.  */
          GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
          GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
          return;
          return;
        }
        }
      else
      else
        retarray->data = internal_malloc_size (alloc_size);
        retarray->data = internal_malloc_size (alloc_size);
 
 
    }
    }
  else
  else
    {
    {
      if (rank != GFC_DESCRIPTOR_RANK (retarray))
      if (rank != GFC_DESCRIPTOR_RANK (retarray))
        runtime_error ("rank of return array incorrect in SUM intrinsic");
        runtime_error ("rank of return array incorrect in SUM intrinsic");
 
 
      if (unlikely (compile_options.bounds_check))
      if (unlikely (compile_options.bounds_check))
        {
        {
          bounds_ifunction_return ((array_t *) retarray, extent,
          bounds_ifunction_return ((array_t *) retarray, extent,
                                   "return value", "SUM");
                                   "return value", "SUM");
          bounds_equal_extents ((array_t *) mask, (array_t *) array,
          bounds_equal_extents ((array_t *) mask, (array_t *) array,
                                "MASK argument", "SUM");
                                "MASK argument", "SUM");
        }
        }
    }
    }
 
 
  for (n = 0; n < rank; n++)
  for (n = 0; n < rank; n++)
    {
    {
      count[n] = 0;
      count[n] = 0;
      dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
      dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
      if (extent[n] <= 0)
      if (extent[n] <= 0)
        return;
        return;
    }
    }
 
 
  dest = retarray->data;
  dest = retarray->data;
  base = array->data;
  base = array->data;
 
 
  while (base)
  while (base)
    {
    {
      const GFC_INTEGER_16 * restrict src;
      const GFC_INTEGER_16 * restrict src;
      const GFC_LOGICAL_1 * restrict msrc;
      const GFC_LOGICAL_1 * restrict msrc;
      GFC_INTEGER_16 result;
      GFC_INTEGER_16 result;
      src = base;
      src = base;
      msrc = mbase;
      msrc = mbase;
      {
      {
 
 
  result = 0;
  result = 0;
        if (len <= 0)
        if (len <= 0)
          *dest = 0;
          *dest = 0;
        else
        else
          {
          {
            for (n = 0; n < len; n++, src += delta, msrc += mdelta)
            for (n = 0; n < len; n++, src += delta, msrc += mdelta)
              {
              {
 
 
  if (*msrc)
  if (*msrc)
    result += *src;
    result += *src;
              }
              }
            *dest = result;
            *dest = result;
          }
          }
      }
      }
      /* Advance to the next element.  */
      /* Advance to the next element.  */
      count[0]++;
      count[0]++;
      base += sstride[0];
      base += sstride[0];
      mbase += mstride[0];
      mbase += mstride[0];
      dest += dstride[0];
      dest += dstride[0];
      n = 0;
      n = 0;
      while (count[n] == extent[n])
      while (count[n] == extent[n])
        {
        {
          /* When we get to the end of a dimension, reset it and increment
          /* When we get to the end of a dimension, reset it and increment
             the next dimension.  */
             the next dimension.  */
          count[n] = 0;
          count[n] = 0;
          /* We could precalculate these products, but this is a less
          /* We could precalculate these products, but this is a less
             frequently used path so probably not worth it.  */
             frequently used path so probably not worth it.  */
          base -= sstride[n] * extent[n];
          base -= sstride[n] * extent[n];
          mbase -= mstride[n] * extent[n];
          mbase -= mstride[n] * extent[n];
          dest -= dstride[n] * extent[n];
          dest -= dstride[n] * extent[n];
          n++;
          n++;
          if (n == rank)
          if (n == rank)
            {
            {
              /* Break out of the look.  */
              /* Break out of the look.  */
              base = NULL;
              base = NULL;
              break;
              break;
            }
            }
          else
          else
            {
            {
              count[n]++;
              count[n]++;
              base += sstride[n];
              base += sstride[n];
              mbase += mstride[n];
              mbase += mstride[n];
              dest += dstride[n];
              dest += dstride[n];
            }
            }
        }
        }
    }
    }
}
}
 
 
 
 
extern void ssum_i16 (gfc_array_i16 * const restrict,
extern void ssum_i16 (gfc_array_i16 * const restrict,
        gfc_array_i16 * const restrict, const index_type * const restrict,
        gfc_array_i16 * const restrict, const index_type * const restrict,
        GFC_LOGICAL_4 *);
        GFC_LOGICAL_4 *);
export_proto(ssum_i16);
export_proto(ssum_i16);
 
 
void
void
ssum_i16 (gfc_array_i16 * const restrict retarray,
ssum_i16 (gfc_array_i16 * const restrict retarray,
        gfc_array_i16 * const restrict array,
        gfc_array_i16 * const restrict array,
        const index_type * const restrict pdim,
        const index_type * const restrict pdim,
        GFC_LOGICAL_4 * mask)
        GFC_LOGICAL_4 * mask)
{
{
  index_type count[GFC_MAX_DIMENSIONS];
  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type dstride[GFC_MAX_DIMENSIONS];
  index_type dstride[GFC_MAX_DIMENSIONS];
  GFC_INTEGER_16 * restrict dest;
  GFC_INTEGER_16 * restrict dest;
  index_type rank;
  index_type rank;
  index_type n;
  index_type n;
  index_type dim;
  index_type dim;
 
 
 
 
  if (*mask)
  if (*mask)
    {
    {
      sum_i16 (retarray, array, pdim);
      sum_i16 (retarray, array, pdim);
      return;
      return;
    }
    }
  /* Make dim zero based to avoid confusion.  */
  /* Make dim zero based to avoid confusion.  */
  dim = (*pdim) - 1;
  dim = (*pdim) - 1;
  rank = GFC_DESCRIPTOR_RANK (array) - 1;
  rank = GFC_DESCRIPTOR_RANK (array) - 1;
 
 
  for (n = 0; n < dim; n++)
  for (n = 0; n < dim; n++)
    {
    {
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
      extent[n] = GFC_DESCRIPTOR_EXTENT(array,n);
 
 
      if (extent[n] <= 0)
      if (extent[n] <= 0)
        extent[n] = 0;
        extent[n] = 0;
    }
    }
 
 
  for (n = dim; n < rank; n++)
  for (n = dim; n < rank; n++)
    {
    {
      extent[n] =
      extent[n] =
        GFC_DESCRIPTOR_EXTENT(array,n + 1);
        GFC_DESCRIPTOR_EXTENT(array,n + 1);
 
 
      if (extent[n] <= 0)
      if (extent[n] <= 0)
        extent[n] = 0;
        extent[n] = 0;
    }
    }
 
 
  if (retarray->data == NULL)
  if (retarray->data == NULL)
    {
    {
      size_t alloc_size, str;
      size_t alloc_size, str;
 
 
      for (n = 0; n < rank; n++)
      for (n = 0; n < rank; n++)
        {
        {
          if (n == 0)
          if (n == 0)
            str = 1;
            str = 1;
          else
          else
            str = GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
            str = GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1];
 
 
          GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
          GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str);
 
 
        }
        }
 
 
      retarray->offset = 0;
      retarray->offset = 0;
      retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
      retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
 
 
      alloc_size = sizeof (GFC_INTEGER_16) * GFC_DESCRIPTOR_STRIDE(retarray,rank-1)
      alloc_size = sizeof (GFC_INTEGER_16) * GFC_DESCRIPTOR_STRIDE(retarray,rank-1)
                   * extent[rank-1];
                   * extent[rank-1];
 
 
      if (alloc_size == 0)
      if (alloc_size == 0)
        {
        {
          /* Make sure we have a zero-sized array.  */
          /* Make sure we have a zero-sized array.  */
          GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
          GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1);
          return;
          return;
        }
        }
      else
      else
        retarray->data = internal_malloc_size (alloc_size);
        retarray->data = internal_malloc_size (alloc_size);
    }
    }
  else
  else
    {
    {
      if (rank != GFC_DESCRIPTOR_RANK (retarray))
      if (rank != GFC_DESCRIPTOR_RANK (retarray))
        runtime_error ("rank of return array incorrect in"
        runtime_error ("rank of return array incorrect in"
                       " SUM intrinsic: is %ld, should be %ld",
                       " SUM intrinsic: is %ld, should be %ld",
                       (long int) (GFC_DESCRIPTOR_RANK (retarray)),
                       (long int) (GFC_DESCRIPTOR_RANK (retarray)),
                       (long int) rank);
                       (long int) rank);
 
 
      if (unlikely (compile_options.bounds_check))
      if (unlikely (compile_options.bounds_check))
        {
        {
          for (n=0; n < rank; n++)
          for (n=0; n < rank; n++)
            {
            {
              index_type ret_extent;
              index_type ret_extent;
 
 
              ret_extent = GFC_DESCRIPTOR_EXTENT(retarray,n);
              ret_extent = GFC_DESCRIPTOR_EXTENT(retarray,n);
              if (extent[n] != ret_extent)
              if (extent[n] != ret_extent)
                runtime_error ("Incorrect extent in return value of"
                runtime_error ("Incorrect extent in return value of"
                               " SUM intrinsic in dimension %ld:"
                               " SUM intrinsic in dimension %ld:"
                               " is %ld, should be %ld", (long int) n + 1,
                               " is %ld, should be %ld", (long int) n + 1,
                               (long int) ret_extent, (long int) extent[n]);
                               (long int) ret_extent, (long int) extent[n]);
            }
            }
        }
        }
    }
    }
 
 
  for (n = 0; n < rank; n++)
  for (n = 0; n < rank; n++)
    {
    {
      count[n] = 0;
      count[n] = 0;
      dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
      dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n);
    }
    }
 
 
  dest = retarray->data;
  dest = retarray->data;
 
 
  while(1)
  while(1)
    {
    {
      *dest = 0;
      *dest = 0;
      count[0]++;
      count[0]++;
      dest += dstride[0];
      dest += dstride[0];
      n = 0;
      n = 0;
      while (count[n] == extent[n])
      while (count[n] == extent[n])
        {
        {
          /* When we get to the end of a dimension, reset it and increment
          /* When we get to the end of a dimension, reset it and increment
             the next dimension.  */
             the next dimension.  */
          count[n] = 0;
          count[n] = 0;
          /* We could precalculate these products, but this is a less
          /* We could precalculate these products, but this is a less
             frequently used path so probably not worth it.  */
             frequently used path so probably not worth it.  */
          dest -= dstride[n] * extent[n];
          dest -= dstride[n] * extent[n];
          n++;
          n++;
          if (n == rank)
          if (n == rank)
            return;
            return;
          else
          else
            {
            {
              count[n]++;
              count[n]++;
              dest += dstride[n];
              dest += dstride[n];
            }
            }
        }
        }
    }
    }
}
}
 
 
#endif
#endif
 
 

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