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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgfortran/] [generated/] [cshift1_16.c] - Blame information for rev 733

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1 733 jeremybenn
/* Implementation of the CSHIFT intrinsic
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   Copyright 2003, 2007, 2009 Free Software Foundation, Inc.
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   Contributed by Feng Wang <wf_cs@yahoo.com>
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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 3 of the License, or (at your option) any later version.
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Ligbfortran 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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Under Section 7 of GPL version 3, you are granted additional
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permissions described in the GCC Runtime Library Exception, version
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3.1, as published by the Free Software Foundation.
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You should have received a copy of the GNU General Public License and
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a copy of the GCC Runtime Library Exception along with this program;
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see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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<http://www.gnu.org/licenses/>.  */
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#include "libgfortran.h"
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#include <stdlib.h>
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#include <assert.h>
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#include <string.h>
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#if defined (HAVE_GFC_INTEGER_16)
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static void
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cshift1 (gfc_array_char * const restrict ret,
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        const gfc_array_char * const restrict array,
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        const gfc_array_i16 * const restrict h,
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        const GFC_INTEGER_16 * const restrict pwhich)
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{
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  /* r.* indicates the return array.  */
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  index_type rstride[GFC_MAX_DIMENSIONS];
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  index_type rstride0;
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  index_type roffset;
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  char *rptr;
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  char *dest;
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  /* s.* indicates the source array.  */
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  index_type sstride[GFC_MAX_DIMENSIONS];
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  index_type sstride0;
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  index_type soffset;
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  const char *sptr;
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  const char *src;
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  /* h.* indicates the shift array.  */
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  index_type hstride[GFC_MAX_DIMENSIONS];
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  index_type hstride0;
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  const GFC_INTEGER_16 *hptr;
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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 dim;
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  index_type len;
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  index_type n;
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  int which;
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  GFC_INTEGER_16 sh;
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  index_type arraysize;
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  index_type size;
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  if (pwhich)
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    which = *pwhich - 1;
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  else
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    which = 0;
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  if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
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    runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
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  size = GFC_DESCRIPTOR_SIZE(array);
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  arraysize = size0 ((array_t *)array);
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  if (ret->data == NULL)
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    {
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      int i;
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      ret->data = internal_malloc_size (size * arraysize);
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      ret->offset = 0;
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      ret->dtype = array->dtype;
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      for (i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
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        {
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          index_type ub, str;
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          ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
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92
          if (i == 0)
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            str = 1;
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          else
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            str = GFC_DESCRIPTOR_EXTENT(ret,i-1) *
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              GFC_DESCRIPTOR_STRIDE(ret,i-1);
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          GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
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        }
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    }
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  else if (unlikely (compile_options.bounds_check))
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    {
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      bounds_equal_extents ((array_t *) ret, (array_t *) array,
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                                 "return value", "CSHIFT");
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    }
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  if (unlikely (compile_options.bounds_check))
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    {
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      bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
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                              "SHIFT argument", "CSHIFT");
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    }
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  if (arraysize == 0)
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    return;
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  extent[0] = 1;
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  count[0] = 0;
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  n = 0;
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  /* Initialized for avoiding compiler warnings.  */
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  roffset = size;
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  soffset = size;
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  len = 0;
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  for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
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    {
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      if (dim == which)
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        {
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          roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
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          if (roffset == 0)
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            roffset = size;
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          soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
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          if (soffset == 0)
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            soffset = size;
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          len = GFC_DESCRIPTOR_EXTENT(array,dim);
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        }
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      else
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        {
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          count[n] = 0;
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          extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
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          rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
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          sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
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          hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
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          n++;
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        }
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    }
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  if (sstride[0] == 0)
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    sstride[0] = size;
150
  if (rstride[0] == 0)
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    rstride[0] = size;
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  if (hstride[0] == 0)
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    hstride[0] = 1;
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155
  dim = GFC_DESCRIPTOR_RANK (array);
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  rstride0 = rstride[0];
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  sstride0 = sstride[0];
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  hstride0 = hstride[0];
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  rptr = ret->data;
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  sptr = array->data;
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  hptr = h->data;
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163
  while (rptr)
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    {
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      /* Do the shift for this dimension.  */
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      sh = *hptr;
167
      sh = (div (sh, len)).rem;
168
      if (sh < 0)
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        sh += len;
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171
      src = &sptr[sh * soffset];
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      dest = rptr;
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174
      for (n = 0; n < len; n++)
175
        {
176
          memcpy (dest, src, size);
177
          dest += roffset;
178
          if (n == len - sh - 1)
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            src = sptr;
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          else
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            src += soffset;
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        }
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184
      /* Advance to the next section.  */
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      rptr += rstride0;
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      sptr += sstride0;
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      hptr += hstride0;
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      count[0]++;
189
      n = 0;
190
      while (count[n] == extent[n])
191
        {
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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 probably not worth it.  */
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          rptr -= rstride[n] * extent[n];
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          sptr -= sstride[n] * extent[n];
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          hptr -= hstride[n] * extent[n];
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          n++;
201
          if (n >= dim - 1)
202
            {
203
              /* Break out of the loop.  */
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              rptr = NULL;
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              break;
206
            }
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          else
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            {
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              count[n]++;
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              rptr += rstride[n];
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              sptr += sstride[n];
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              hptr += hstride[n];
213
            }
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        }
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    }
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}
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218
void cshift1_16 (gfc_array_char * const restrict,
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        const gfc_array_char * const restrict,
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        const gfc_array_i16 * const restrict,
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        const GFC_INTEGER_16 * const restrict);
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export_proto(cshift1_16);
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void
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cshift1_16 (gfc_array_char * const restrict ret,
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        const gfc_array_char * const restrict array,
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        const gfc_array_i16 * const restrict h,
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        const GFC_INTEGER_16 * const restrict pwhich)
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{
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  cshift1 (ret, array, h, pwhich);
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}
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void cshift1_16_char (gfc_array_char * const restrict ret,
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        GFC_INTEGER_4,
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        const gfc_array_char * const restrict array,
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        const gfc_array_i16 * const restrict h,
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        const GFC_INTEGER_16 * const restrict pwhich,
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        GFC_INTEGER_4);
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export_proto(cshift1_16_char);
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242
void
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cshift1_16_char (gfc_array_char * const restrict ret,
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        GFC_INTEGER_4 ret_length __attribute__((unused)),
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        const gfc_array_char * const restrict array,
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        const gfc_array_i16 * const restrict h,
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        const GFC_INTEGER_16 * const restrict pwhich,
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        GFC_INTEGER_4 array_length __attribute__((unused)))
249
{
250
  cshift1 (ret, array, h, pwhich);
251
}
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254
void cshift1_16_char4 (gfc_array_char * const restrict ret,
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        GFC_INTEGER_4,
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        const gfc_array_char * const restrict array,
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        const gfc_array_i16 * const restrict h,
258
        const GFC_INTEGER_16 * const restrict pwhich,
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        GFC_INTEGER_4);
260
export_proto(cshift1_16_char4);
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262
void
263
cshift1_16_char4 (gfc_array_char * const restrict ret,
264
        GFC_INTEGER_4 ret_length __attribute__((unused)),
265
        const gfc_array_char * const restrict array,
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        const gfc_array_i16 * const restrict h,
267
        const GFC_INTEGER_16 * const restrict pwhich,
268
        GFC_INTEGER_4 array_length __attribute__((unused)))
269
{
270
  cshift1 (ret, array, h, pwhich);
271
}
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#endif

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