--- /dev/null
+/* Implementation of the MAXLOC intrinsic
+ Copyright 2002 Free Software Foundation, Inc.
+ Contributed by Paul Brook <paul@nowt.org>
+
+This file is part of the GNU Fortran 95 runtime library (libgfortran).
+
+Libgfortran 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 of the License, or (at your option) any later version.
+
+In addition to the permissions in the GNU General Public License, the
+Free Software Foundation gives you unlimited permission to link the
+compiled version of this file into combinations with other programs,
+and to distribute those combinations without any restriction coming
+from the use of this file. (The General Public License restrictions
+do apply in other respects; for example, they cover modification of
+the file, and distribution when not linked into a combine
+executable.)
+
+Libgfortran 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 libgfortran; see the file COPYING. If not,
+write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
+
+#include "config.h"
+#include <stdlib.h>
+#include <assert.h>
+#include <float.h>
+#include <limits.h>
+#include "libgfortran.h"
+
+
+#if defined (HAVE_GFC_INTEGER_1) && defined (HAVE_GFC_INTEGER_8)
+
+
+extern void maxloc1_8_i1 (gfc_array_i8 * const restrict,
+ gfc_array_i1 * const restrict, const index_type * const restrict);
+export_proto(maxloc1_8_i1);
+
+void
+maxloc1_8_i1 (gfc_array_i8 * const restrict retarray,
+ gfc_array_i1 * const restrict array,
+ const index_type * const restrict pdim)
+{
+ index_type count[GFC_MAX_DIMENSIONS];
+ index_type extent[GFC_MAX_DIMENSIONS];
+ index_type sstride[GFC_MAX_DIMENSIONS];
+ index_type dstride[GFC_MAX_DIMENSIONS];
+ const GFC_INTEGER_1 * restrict base;
+ GFC_INTEGER_8 * restrict dest;
+ index_type rank;
+ index_type n;
+ index_type len;
+ index_type delta;
+ index_type dim;
+
+ /* Make dim zero based to avoid confusion. */
+ dim = (*pdim) - 1;
+ rank = GFC_DESCRIPTOR_RANK (array) - 1;
+
+ len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
+ delta = array->dim[dim].stride;
+
+ for (n = 0; n < dim; n++)
+ {
+ sstride[n] = array->dim[n].stride;
+ extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
+
+ if (extent[n] < 0)
+ extent[n] = 0;
+ }
+ for (n = dim; n < rank; n++)
+ {
+ sstride[n] = array->dim[n + 1].stride;
+ extent[n] =
+ array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
+
+ if (extent[n] < 0)
+ extent[n] = 0;
+ }
+
+ if (retarray->data == NULL)
+ {
+ size_t alloc_size;
+
+ for (n = 0; n < rank; n++)
+ {
+ retarray->dim[n].lbound = 0;
+ retarray->dim[n].ubound = extent[n]-1;
+ if (n == 0)
+ retarray->dim[n].stride = 1;
+ else
+ retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
+ }
+
+ retarray->offset = 0;
+ retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
+
+ alloc_size = sizeof (GFC_INTEGER_8) * retarray->dim[rank-1].stride
+ * extent[rank-1];
+
+ if (alloc_size == 0)
+ {
+ /* Make sure we have a zero-sized array. */
+ retarray->dim[0].lbound = 0;
+ retarray->dim[0].ubound = -1;
+ return;
+ }
+ else
+ retarray->data = internal_malloc_size (alloc_size);
+ }
+ else
+ {
+ if (rank != GFC_DESCRIPTOR_RANK (retarray))
+ runtime_error ("rank of return array incorrect");
+ }
+
+ for (n = 0; n < rank; n++)
+ {
+ count[n] = 0;
+ dstride[n] = retarray->dim[n].stride;
+ if (extent[n] <= 0)
+ len = 0;
+ }
+
+ base = array->data;
+ dest = retarray->data;
+
+ while (base)
+ {
+ const GFC_INTEGER_1 * restrict src;
+ GFC_INTEGER_8 result;
+ src = base;
+ {
+
+ GFC_INTEGER_1 maxval;
+ maxval = (-GFC_INTEGER_1_HUGE-1);
+ result = 0;
+ if (len <= 0)
+ *dest = 0;
+ else
+ {
+ for (n = 0; n < len; n++, src += delta)
+ {
+
+ if (*src > maxval || !result)
+ {
+ maxval = *src;
+ result = (GFC_INTEGER_8)n + 1;
+ }
+ }
+ *dest = result;
+ }
+ }
+ /* Advance to the next element. */
+ count[0]++;
+ base += sstride[0];
+ dest += dstride[0];
+ n = 0;
+ while (count[n] == extent[n])
+ {
+ /* When we get to the end of a dimension, reset it and increment
+ the next dimension. */
+ count[n] = 0;
+ /* We could precalculate these products, but this is a less
+ frequently used path so probably not worth it. */
+ base -= sstride[n] * extent[n];
+ dest -= dstride[n] * extent[n];
+ n++;
+ if (n == rank)
+ {
+ /* Break out of the look. */
+ base = NULL;
+ break;
+ }
+ else
+ {
+ count[n]++;
+ base += sstride[n];
+ dest += dstride[n];
+ }
+ }
+ }
+}
+
+
+extern void mmaxloc1_8_i1 (gfc_array_i8 * const restrict,
+ gfc_array_i1 * const restrict, const index_type * const restrict,
+ gfc_array_l4 * const restrict);
+export_proto(mmaxloc1_8_i1);
+
+void
+mmaxloc1_8_i1 (gfc_array_i8 * const restrict retarray,
+ gfc_array_i1 * const restrict array,
+ const index_type * const restrict pdim,
+ gfc_array_l4 * const restrict mask)
+{
+ index_type count[GFC_MAX_DIMENSIONS];
+ index_type extent[GFC_MAX_DIMENSIONS];
+ index_type sstride[GFC_MAX_DIMENSIONS];
+ index_type dstride[GFC_MAX_DIMENSIONS];
+ index_type mstride[GFC_MAX_DIMENSIONS];
+ GFC_INTEGER_8 * restrict dest;
+ const GFC_INTEGER_1 * restrict base;
+ const GFC_LOGICAL_4 * restrict mbase;
+ int rank;
+ int dim;
+ index_type n;
+ index_type len;
+ index_type delta;
+ index_type mdelta;
+
+ dim = (*pdim) - 1;
+ rank = GFC_DESCRIPTOR_RANK (array) - 1;
+
+ len = array->dim[dim].ubound + 1 - array->dim[dim].lbound;
+ if (len <= 0)
+ return;
+ delta = array->dim[dim].stride;
+ mdelta = mask->dim[dim].stride;
+
+ for (n = 0; n < dim; n++)
+ {
+ sstride[n] = array->dim[n].stride;
+ mstride[n] = mask->dim[n].stride;
+ extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
+
+ if (extent[n] < 0)
+ extent[n] = 0;
+
+ }
+ for (n = dim; n < rank; n++)
+ {
+ sstride[n] = array->dim[n + 1].stride;
+ mstride[n] = mask->dim[n + 1].stride;
+ extent[n] =
+ array->dim[n + 1].ubound + 1 - array->dim[n + 1].lbound;
+
+ if (extent[n] < 0)
+ extent[n] = 0;
+ }
+
+ if (retarray->data == NULL)
+ {
+ size_t alloc_size;
+
+ for (n = 0; n < rank; n++)
+ {
+ retarray->dim[n].lbound = 0;
+ retarray->dim[n].ubound = extent[n]-1;
+ if (n == 0)
+ retarray->dim[n].stride = 1;
+ else
+ retarray->dim[n].stride = retarray->dim[n-1].stride * extent[n-1];
+ }
+
+ alloc_size = sizeof (GFC_INTEGER_8) * retarray->dim[rank-1].stride
+ * extent[rank-1];
+
+ retarray->offset = 0;
+ retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank;
+
+ if (alloc_size == 0)
+ {
+ /* Make sure we have a zero-sized array. */
+ retarray->dim[0].lbound = 0;
+ retarray->dim[0].ubound = -1;
+ return;
+ }
+ else
+ retarray->data = internal_malloc_size (alloc_size);
+
+ }
+ else
+ {
+ if (rank != GFC_DESCRIPTOR_RANK (retarray))
+ runtime_error ("rank of return array incorrect");
+ }
+
+ for (n = 0; n < rank; n++)
+ {
+ count[n] = 0;
+ dstride[n] = retarray->dim[n].stride;
+ if (extent[n] <= 0)
+ return;
+ }
+
+ dest = retarray->data;
+ base = array->data;
+ mbase = mask->data;
+
+ if (GFC_DESCRIPTOR_SIZE (mask) != 4)
+ {
+ /* This allows the same loop to be used for all logical types. */
+ assert (GFC_DESCRIPTOR_SIZE (mask) == 8);
+ for (n = 0; n < rank; n++)
+ mstride[n] <<= 1;
+ mdelta <<= 1;
+ mbase = (GFOR_POINTER_L8_TO_L4 (mbase));
+ }
+
+ while (base)
+ {
+ const GFC_INTEGER_1 * restrict src;
+ const GFC_LOGICAL_4 * restrict msrc;
+ GFC_INTEGER_8 result;
+ src = base;
+ msrc = mbase;
+ {
+
+ GFC_INTEGER_1 maxval;
+ maxval = (-GFC_INTEGER_1_HUGE-1);
+ result = 0;
+ if (len <= 0)
+ *dest = 0;
+ else
+ {
+ for (n = 0; n < len; n++, src += delta, msrc += mdelta)
+ {
+
+ if (*msrc && (*src > maxval || !result))
+ {
+ maxval = *src;
+ result = (GFC_INTEGER_8)n + 1;
+ }
+ }
+ *dest = result;
+ }
+ }
+ /* Advance to the next element. */
+ count[0]++;
+ base += sstride[0];
+ mbase += mstride[0];
+ dest += dstride[0];
+ n = 0;
+ while (count[n] == extent[n])
+ {
+ /* When we get to the end of a dimension, reset it and increment
+ the next dimension. */
+ count[n] = 0;
+ /* We could precalculate these products, but this is a less
+ frequently used path so probably not worth it. */
+ base -= sstride[n] * extent[n];
+ mbase -= mstride[n] * extent[n];
+ dest -= dstride[n] * extent[n];
+ n++;
+ if (n == rank)
+ {
+ /* Break out of the look. */
+ base = NULL;
+ break;
+ }
+ else
+ {
+ count[n]++;
+ base += sstride[n];
+ mbase += mstride[n];
+ dest += dstride[n];
+ }
+ }
+ }
+}
+
+
+extern void smaxloc1_8_i1 (gfc_array_i8 * const restrict,
+ gfc_array_i1 * const restrict, const index_type * const restrict,
+ GFC_LOGICAL_4 *);
+export_proto(smaxloc1_8_i1);
+
+void
+smaxloc1_8_i1 (gfc_array_i8 * const restrict retarray,
+ gfc_array_i1 * const restrict array,
+ const index_type * const restrict pdim,
+ GFC_LOGICAL_4 * mask)
+{
+ index_type rank;
+ index_type n;
+ index_type dstride;
+ GFC_INTEGER_8 *dest;
+
+ if (*mask)
+ {
+ maxloc1_8_i1 (retarray, array, pdim);
+ return;
+ }
+ rank = GFC_DESCRIPTOR_RANK (array);
+ if (rank <= 0)
+ runtime_error ("Rank of array needs to be > 0");
+
+ if (retarray->data == NULL)
+ {
+ retarray->dim[0].lbound = 0;
+ retarray->dim[0].ubound = rank-1;
+ retarray->dim[0].stride = 1;
+ retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1;
+ retarray->offset = 0;
+ retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_8) * rank);
+ }
+ else
+ {
+ if (GFC_DESCRIPTOR_RANK (retarray) != 1)
+ runtime_error ("rank of return array does not equal 1");
+
+ if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank)
+ runtime_error ("dimension of return array incorrect");
+ }
+
+ dstride = retarray->dim[0].stride;
+ dest = retarray->data;
+
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = 0 ;
+}
+
+#endif
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