text: /* 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_INTEGER_8) && defined (HAVE_GFC_INTEGER_16)
  
  
  extern void minloc0_16_i8 (gfc_array_i16 * const restrict retarray, 
  	gfc_array_i8 * const restrict array);
  export_proto(minloc0_16_i8);
  
  void
  minloc0_16_i8 (gfc_array_i16 * const restrict retarray, 
  	gfc_array_i8 * const restrict array)
  {
    index_type count[GFC_MAX_DIMENSIONS];
    index_type extent[GFC_MAX_DIMENSIONS];
    index_type sstride[GFC_MAX_DIMENSIONS];
    index_type dstride;
    const GFC_INTEGER_8 *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");
      }
  
    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] = 0;
    {
  
    GFC_INTEGER_8 minval;
  
    minval = GFC_INTEGER_8_HUGE;
  
    while (base)
      {
        {
          /* Implementation start.  */
  
    if (*base < minval || !dest[0])
      {
        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 probably 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_i8 (gfc_array_i16 * const restrict, 
  	gfc_array_i8 * const restrict, gfc_array_l4 * const restrict);
  export_proto(mminloc0_16_i8);
  
  void
  mminloc0_16_i8 (gfc_array_i16 * const restrict retarray, 
  	gfc_array_i8 * const restrict array,
  	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 mstride[GFC_MAX_DIMENSIONS];
    index_type dstride;
    GFC_INTEGER_16 *dest;
    const GFC_INTEGER_8 *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");
      }
  
    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] = 0;
    {
  
    GFC_INTEGER_8 minval;
  
    minval = GFC_INTEGER_8_HUGE;
  
    while (base)
      {
        {
          /* Implementation start.  */
  
    if (*mbase && (*base < minval || !dest[0]))
      {
        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 probably 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];
              }
          }
      }
    }
  }
  
  
  extern void sminloc0_16_i8 (gfc_array_i16 * const restrict, 
  	gfc_array_i8 * const restrict, GFC_LOGICAL_4 *);
  export_proto(sminloc0_16_i8);
  
  void
  sminloc0_16_i8 (gfc_array_i16 * const restrict retarray, 
  	gfc_array_i8 * const restrict array,
  	GFC_LOGICAL_4 * mask)
  {
    index_type rank;
    index_type dstride;
    index_type n;
    GFC_INTEGER_16 *dest;
  
    if (*mask)
      {
        minloc0_16_i8 (retarray, array);
        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_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");
      }
  
    dstride = retarray->dim[0].stride;
    dest = retarray->data;
    for (n = 0; n<rank; n++)
      dest[n * dstride] = 0 ;
  }
  #endif
  