349 lines
9.2 KiB
C
349 lines
9.2 KiB
C
/* Implementation of the MINLOC intrinsic
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Copyright 2002 Free Software Foundation, Inc.
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Contributed by Paul Brook <paul@nowt.org>
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This file is part of the GNU Fortran 95 runtime library (libgfortran).
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Libgfortran is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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Libgfortran is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public
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License along with libgfortran; see the file COPYING. If not,
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write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "config.h"
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#include <stdlib.h>
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#include <assert.h>
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#include <float.h>
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#include <limits.h>
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#include "libgfortran.h"
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#if defined (HAVE_GFC_INTEGER_8) && defined (HAVE_GFC_INTEGER_4)
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extern void minloc0_4_i8 (gfc_array_i4 * const restrict retarray,
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gfc_array_i8 * const restrict array);
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export_proto(minloc0_4_i8);
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void
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minloc0_4_i8 (gfc_array_i4 * const restrict retarray,
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gfc_array_i8 * const restrict array)
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{
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index_type count[GFC_MAX_DIMENSIONS];
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index_type extent[GFC_MAX_DIMENSIONS];
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index_type sstride[GFC_MAX_DIMENSIONS];
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index_type dstride;
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const GFC_INTEGER_8 *base;
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GFC_INTEGER_4 *dest;
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index_type rank;
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index_type n;
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rank = GFC_DESCRIPTOR_RANK (array);
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if (rank <= 0)
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runtime_error ("Rank of array needs to be > 0");
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if (retarray->data == NULL)
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{
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retarray->dim[0].lbound = 0;
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retarray->dim[0].ubound = rank-1;
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retarray->dim[0].stride = 1;
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retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1;
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retarray->offset = 0;
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retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_4) * rank);
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}
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else
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{
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if (GFC_DESCRIPTOR_RANK (retarray) != 1)
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runtime_error ("rank of return array does not equal 1");
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if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank)
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runtime_error ("dimension of return array incorrect");
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if (retarray->dim[0].stride == 0)
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retarray->dim[0].stride = 1;
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}
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/* TODO: It should be a front end job to correctly set the strides. */
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if (array->dim[0].stride == 0)
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array->dim[0].stride = 1;
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dstride = retarray->dim[0].stride;
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dest = retarray->data;
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for (n = 0; n < rank; n++)
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{
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sstride[n] = array->dim[n].stride;
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extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
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count[n] = 0;
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if (extent[n] <= 0)
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{
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/* Set the return value. */
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for (n = 0; n < rank; n++)
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dest[n * dstride] = 0;
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return;
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}
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}
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base = array->data;
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/* Initialize the return value. */
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for (n = 0; n < rank; n++)
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dest[n * dstride] = 0;
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{
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GFC_INTEGER_8 minval;
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minval = GFC_INTEGER_8_HUGE;
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while (base)
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{
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{
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/* Implementation start. */
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if (*base < minval || !dest[0])
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{
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minval = *base;
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for (n = 0; n < rank; n++)
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dest[n * dstride] = count[n] + 1;
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}
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/* Implementation end. */
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}
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/* Advance to the next element. */
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count[0]++;
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base += sstride[0];
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n = 0;
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while (count[n] == extent[n])
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{
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/* When we get to the end of a dimension, reset it and increment
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the next dimension. */
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count[n] = 0;
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/* We could precalculate these products, but this is a less
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frequently used path so proabably not worth it. */
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base -= sstride[n] * extent[n];
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n++;
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if (n == rank)
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{
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/* Break out of the loop. */
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base = NULL;
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break;
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}
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else
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{
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count[n]++;
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base += sstride[n];
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}
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}
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}
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}
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}
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extern void mminloc0_4_i8 (gfc_array_i4 * const restrict,
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gfc_array_i8 * const restrict, gfc_array_l4 * const restrict);
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export_proto(mminloc0_4_i8);
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void
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mminloc0_4_i8 (gfc_array_i4 * const restrict retarray,
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gfc_array_i8 * const restrict array,
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gfc_array_l4 * const restrict mask)
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{
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index_type count[GFC_MAX_DIMENSIONS];
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index_type extent[GFC_MAX_DIMENSIONS];
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index_type sstride[GFC_MAX_DIMENSIONS];
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index_type mstride[GFC_MAX_DIMENSIONS];
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index_type dstride;
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GFC_INTEGER_4 *dest;
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const GFC_INTEGER_8 *base;
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GFC_LOGICAL_4 *mbase;
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int rank;
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index_type n;
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rank = GFC_DESCRIPTOR_RANK (array);
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if (rank <= 0)
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runtime_error ("Rank of array needs to be > 0");
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if (retarray->data == NULL)
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{
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retarray->dim[0].lbound = 0;
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retarray->dim[0].ubound = rank-1;
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retarray->dim[0].stride = 1;
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retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1;
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retarray->offset = 0;
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retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_4) * rank);
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}
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else
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{
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if (GFC_DESCRIPTOR_RANK (retarray) != 1)
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runtime_error ("rank of return array does not equal 1");
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if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank)
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runtime_error ("dimension of return array incorrect");
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if (retarray->dim[0].stride == 0)
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retarray->dim[0].stride = 1;
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}
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/* TODO: It should be a front end job to correctly set the strides. */
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if (array->dim[0].stride == 0)
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array->dim[0].stride = 1;
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if (mask->dim[0].stride == 0)
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mask->dim[0].stride = 1;
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dstride = retarray->dim[0].stride;
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dest = retarray->data;
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for (n = 0; n < rank; n++)
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{
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sstride[n] = array->dim[n].stride;
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mstride[n] = mask->dim[n].stride;
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extent[n] = array->dim[n].ubound + 1 - array->dim[n].lbound;
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count[n] = 0;
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if (extent[n] <= 0)
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{
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/* Set the return value. */
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for (n = 0; n < rank; n++)
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dest[n * dstride] = 0;
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return;
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}
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}
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base = array->data;
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mbase = mask->data;
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if (GFC_DESCRIPTOR_SIZE (mask) != 4)
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{
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/* This allows the same loop to be used for all logical types. */
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assert (GFC_DESCRIPTOR_SIZE (mask) == 8);
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for (n = 0; n < rank; n++)
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mstride[n] <<= 1;
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mbase = (GFOR_POINTER_L8_TO_L4 (mbase));
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}
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/* Initialize the return value. */
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for (n = 0; n < rank; n++)
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dest[n * dstride] = 0;
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{
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GFC_INTEGER_8 minval;
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minval = GFC_INTEGER_8_HUGE;
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while (base)
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{
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{
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/* Implementation start. */
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if (*mbase && (*base < minval || !dest[0]))
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{
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minval = *base;
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for (n = 0; n < rank; n++)
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dest[n * dstride] = count[n] + 1;
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}
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/* Implementation end. */
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}
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/* Advance to the next element. */
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count[0]++;
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base += sstride[0];
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mbase += mstride[0];
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n = 0;
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while (count[n] == extent[n])
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{
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/* When we get to the end of a dimension, reset it and increment
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the next dimension. */
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count[n] = 0;
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/* We could precalculate these products, but this is a less
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frequently used path so proabably not worth it. */
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base -= sstride[n] * extent[n];
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mbase -= mstride[n] * extent[n];
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n++;
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if (n == rank)
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{
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/* Break out of the loop. */
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base = NULL;
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break;
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}
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else
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{
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count[n]++;
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base += sstride[n];
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mbase += mstride[n];
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}
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}
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}
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}
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}
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extern void sminloc0_4_i8 (gfc_array_i4 * const restrict,
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gfc_array_i8 * const restrict, GFC_LOGICAL_4 *);
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export_proto(sminloc0_4_i8);
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void
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sminloc0_4_i8 (gfc_array_i4 * const restrict retarray,
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gfc_array_i8 * const restrict array,
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GFC_LOGICAL_4 * mask)
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{
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index_type rank;
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index_type dstride;
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index_type n;
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GFC_INTEGER_4 *dest;
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if (*mask)
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{
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minloc0_4_i8 (retarray, array);
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return;
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}
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rank = GFC_DESCRIPTOR_RANK (array);
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if (rank <= 0)
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runtime_error ("Rank of array needs to be > 0");
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if (retarray->data == NULL)
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{
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retarray->dim[0].lbound = 0;
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retarray->dim[0].ubound = rank-1;
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retarray->dim[0].stride = 1;
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retarray->dtype = (retarray->dtype & ~GFC_DTYPE_RANK_MASK) | 1;
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retarray->offset = 0;
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retarray->data = internal_malloc_size (sizeof (GFC_INTEGER_4) * rank);
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}
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else
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{
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if (GFC_DESCRIPTOR_RANK (retarray) != 1)
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runtime_error ("rank of return array does not equal 1");
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if (retarray->dim[0].ubound + 1 - retarray->dim[0].lbound != rank)
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runtime_error ("dimension of return array incorrect");
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if (retarray->dim[0].stride == 0)
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retarray->dim[0].stride = 1;
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}
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dstride = retarray->dim[0].stride;
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dest = retarray->data;
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for (n = 0; n<rank; n++)
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dest[n * dstride] = 0 ;
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}
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#endif
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