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+/* Implementation of the MINLOC 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_REAL_16) && defined (HAVE_GFC_INTEGER_16)
+
+
+extern void minloc0_16_r16 (gfc_array_i16 * retarray, gfc_array_r16 *array);
+export_proto(minloc0_16_r16);
+
+void
+minloc0_16_r16 (gfc_array_i16 * retarray, gfc_array_r16 *array)
+{
+ index_type count[GFC_MAX_DIMENSIONS];
+ index_type extent[GFC_MAX_DIMENSIONS];
+ index_type sstride[GFC_MAX_DIMENSIONS];
+ index_type dstride;
+ GFC_REAL_16 *base;
+ GFC_INTEGER_16 *dest;
+ index_type rank;
+ index_type n;
+
+ 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_16) * 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");
+
+ if (retarray->dim[0].stride == 0)
+ retarray->dim[0].stride = 1;
+ }
+
+ /* TODO: It should be a front end job to correctly set the strides. */
+
+ if (array->dim[0].stride == 0)
+ array->dim[0].stride = 1;
+
+ dstride = retarray->dim[0].stride;
+ dest = retarray->data;
+ for (n = 0; n < rank; n++)
+ {
+ sstride[n] = array->dim[n].stride;
+ extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
+ count[n] = 0;
+ if (extent[n] <= 0)
+ {
+ /* Set the return value. */
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = 0;
+ return;
+ }
+ }
+
+ base = array->data;
+
+ /* Initialize the return value. */
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = 1;
+ {
+
+ GFC_REAL_16 minval;
+
+ minval = GFC_REAL_16_HUGE;
+
+ while (base)
+ {
+ {
+ /* Implementation start. */
+
+ if (*base < minval)
+ {
+ minval = *base;
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = count[n] + 1;
+ }
+ /* Implementation end. */
+ }
+ /* Advance to the next element. */
+ count[0]++;
+ base += sstride[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 proabably not worth it. */
+ base -= sstride[n] * extent[n];
+ n++;
+ if (n == rank)
+ {
+ /* Break out of the loop. */
+ base = NULL;
+ break;
+ }
+ else
+ {
+ count[n]++;
+ base += sstride[n];
+ }
+ }
+ }
+ }
+}
+
+
+extern void mminloc0_16_r16 (gfc_array_i16 *, gfc_array_r16 *, gfc_array_l4 *);
+export_proto(mminloc0_16_r16);
+
+void
+mminloc0_16_r16 (gfc_array_i16 * retarray, gfc_array_r16 *array,
+ gfc_array_l4 * mask)
+{
+ index_type count[GFC_MAX_DIMENSIONS];
+ index_type extent[GFC_MAX_DIMENSIONS];
+ index_type sstride[GFC_MAX_DIMENSIONS];
+ index_type mstride[GFC_MAX_DIMENSIONS];
+ index_type dstride;
+ GFC_INTEGER_16 *dest;
+ GFC_REAL_16 *base;
+ GFC_LOGICAL_4 *mbase;
+ int rank;
+ index_type n;
+
+ 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_16) * 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");
+
+ if (retarray->dim[0].stride == 0)
+ retarray->dim[0].stride = 1;
+ }
+
+ /* TODO: It should be a front end job to correctly set the strides. */
+
+ if (array->dim[0].stride == 0)
+ array->dim[0].stride = 1;
+
+ if (mask->dim[0].stride == 0)
+ mask->dim[0].stride = 1;
+
+ dstride = retarray->dim[0].stride;
+ dest = retarray->data;
+ for (n = 0; n < rank; n++)
+ {
+ sstride[n] = array->dim[n].stride;
+ mstride[n] = mask->dim[n].stride;
+ extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
+ count[n] = 0;
+ if (extent[n] <= 0)
+ {
+ /* Set the return value. */
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = 0;
+ return;
+ }
+ }
+
+ 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;
+ mbase = (GFOR_POINTER_L8_TO_L4 (mbase));
+ }
+
+
+ /* Initialize the return value. */
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = 1;
+ {
+
+ GFC_REAL_16 minval;
+
+ minval = GFC_REAL_16_HUGE;
+
+ while (base)
+ {
+ {
+ /* Implementation start. */
+
+ if (*mbase && *base < minval)
+ {
+ minval = *base;
+ for (n = 0; n < rank; n++)
+ dest[n * dstride] = count[n] + 1;
+ }
+ /* Implementation end. */
+ }
+ /* Advance to the next element. */
+ count[0]++;
+ base += sstride[0];
+ mbase += mstride[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 proabably not worth it. */
+ base -= sstride[n] * extent[n];
+ mbase -= mstride[n] * extent[n];
+ n++;
+ if (n == rank)
+ {
+ /* Break out of the loop. */
+ base = NULL;
+ break;
+ }
+ else
+ {
+ count[n]++;
+ base += sstride[n];
+ mbase += mstride[n];
+ }
+ }
+ }
+ }
+}
+
+#endif
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