[thirdparty/gcc.git] / libgfortran / generated / eoshift1_4.c

/* Implementation of the EOSHIFT intrinsic
   Copyright (C) 2002-2025 Free Software Foundation, Inc.
   Contributed by Paul Brook <paul@nowt.org>

This file is part of the GNU Fortran 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 3 of the License, or (at your option) any later version.

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.

Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */

#include "libgfortran.h"
#include <string.h>


#if defined (HAVE_GFC_INTEGER_4)

static void
eoshift1 (gfc_array_char * const restrict ret, 
	const gfc_array_char * const restrict array, 
	const gfc_array_i4 * const restrict h,
	const char * const restrict pbound, 
	const GFC_INTEGER_4 * const restrict pwhich, 
	const char * filler, index_type filler_len)
{
  /* r.* indicates the return array.  */
  index_type rstride[GFC_MAX_DIMENSIONS];
  index_type rstride0;
  index_type roffset;
  char *rptr;
  char * restrict dest;
  /* s.* indicates the source array.  */
  index_type sstride[GFC_MAX_DIMENSIONS];
  index_type sstride0;
  index_type soffset;
  const char *sptr;
  const char *src;
  /* h.* indicates the shift array.  */
  index_type hstride[GFC_MAX_DIMENSIONS];
  index_type hstride0;
  const GFC_INTEGER_4 *hptr;

  index_type count[GFC_MAX_DIMENSIONS];
  index_type extent[GFC_MAX_DIMENSIONS];
  index_type dim;
  index_type len;
  index_type n;
  index_type size;
  index_type arraysize;
  int which;
  GFC_INTEGER_4 sh;
  GFC_INTEGER_4 delta;

  /* The compiler cannot figure out that these are set, initialize
     them to avoid warnings.  */
  len = 0;
  soffset = 0;
  roffset = 0;

  size = GFC_DESCRIPTOR_SIZE(array);

  if (pwhich)
    which = *pwhich - 1;
  else
    which = 0;

  extent[0] = 1;
  count[0] = 0;

  arraysize = size0 ((array_t *) array);
  if (ret->base_addr == NULL)
    {
      ret->offset = 0;
      GFC_DTYPE_COPY(ret,array);
      for (index_type i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
        {
	  index_type ub, str;

	  ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;

          if (i == 0)
            str = 1;
          else
            str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
	      * GFC_DESCRIPTOR_STRIDE(ret,i-1);

	  GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);

        }
      /* xmallocarray allocates a single byte for zero size.  */
      ret->base_addr = xmallocarray (arraysize, size);

    }
  else if (unlikely (compile_options.bounds_check))
    {
      bounds_equal_extents ((array_t *) ret, (array_t *) array,
				 "return value", "EOSHIFT");
    }

  if (unlikely (compile_options.bounds_check))
    {
      bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
      			      "SHIFT argument", "EOSHIFT");
    }

  if (arraysize == 0)
    return;

  n = 0;
  for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
    {
      if (dim == which)
        {
          roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
          if (roffset == 0)
            roffset = size;
          soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
          if (soffset == 0)
            soffset = size;
          len = GFC_DESCRIPTOR_EXTENT(array,dim);
        }
      else
        {
          count[n] = 0;
          extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
          rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
          sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);

          hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
          n++;
        }
    }
  if (sstride[0] == 0)
    sstride[0] = size;
  if (rstride[0] == 0)
    rstride[0] = size;
  if (hstride[0] == 0)
    hstride[0] = 1;

  dim = GFC_DESCRIPTOR_RANK (array);
  rstride0 = rstride[0];
  sstride0 = sstride[0];
  hstride0 = hstride[0];
  rptr = ret->base_addr;
  sptr = array->base_addr;
  hptr = h->base_addr;

  while (rptr)
    {
      /* Do the shift for this dimension.  */
      sh = *hptr;
      if (( sh >= 0 ? sh : -sh ) > len)
	{
	  delta = len;
	  sh = len;
	}
      else
	delta = (sh >= 0) ? sh: -sh;

      if (sh > 0)
        {
          src = &sptr[delta * soffset];
          dest = rptr;
        }
      else
        {
          src = sptr;
          dest = &rptr[delta * roffset];
        }

      /* If the elements are contiguous, perform a single block move.  */
      if (soffset == size && roffset == size)
	{
	  size_t chunk = size * (len - delta);
	  memcpy (dest, src, chunk);
	  dest += chunk;
	}
      else
	{
	  for (n = 0; n < len - delta; n++)
	    {
	      memcpy (dest, src, size);
	      dest += roffset;
	      src += soffset;
	    }
	}
      if (sh < 0)
        dest = rptr;
      n = delta;

      if (pbound)
	while (n--)
	  {
	    memcpy (dest, pbound, size);
	    dest += roffset;
	  }
      else
	while (n--)
	  {
	    index_type i;

	    if (filler_len == 1)
	      memset (dest, filler[0], size);
	    else
	      for (i = 0; i < size; i += filler_len)
		memcpy (&dest[i], filler, filler_len);

	    dest += roffset;
	  }

      /* Advance to the next section.  */
      rptr += rstride0;
      sptr += sstride0;
      hptr += hstride0;
      count[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.  */
          rptr -= rstride[n] * extent[n];
          sptr -= sstride[n] * extent[n];
	  hptr -= hstride[n] * extent[n];
          n++;
          if (n >= dim - 1)
            {
              /* Break out of the loop.  */
              rptr = NULL;
              break;
            }
          else
            {
              count[n]++;
              rptr += rstride[n];
              sptr += sstride[n];
	      hptr += hstride[n];
            }
        }
    }
}

void eoshift1_4 (gfc_array_char * const restrict, 
	const gfc_array_char * const restrict,
	const gfc_array_i4 * const restrict, const char * const restrict, 
	const GFC_INTEGER_4 * const restrict);
export_proto(eoshift1_4);

void
eoshift1_4 (gfc_array_char * const restrict ret, 
	const gfc_array_char * const restrict array,
	const gfc_array_i4 * const restrict h, 
	const char * const restrict pbound,
	const GFC_INTEGER_4 * const restrict pwhich)
{
  eoshift1 (ret, array, h, pbound, pwhich, "\0", 1);
}


void eoshift1_4_char (gfc_array_char * const restrict, 
	GFC_INTEGER_4,
	const gfc_array_char * const restrict, 
	const gfc_array_i4 * const restrict,
	const char * const restrict, 
	const GFC_INTEGER_4 * const restrict,
	GFC_INTEGER_4, GFC_INTEGER_4);
export_proto(eoshift1_4_char);

void
eoshift1_4_char (gfc_array_char * const restrict ret,
	GFC_INTEGER_4 ret_length __attribute__((unused)),
	const gfc_array_char * const restrict array, 
	const gfc_array_i4 * const restrict h,
	const char *  const restrict pbound, 
	const GFC_INTEGER_4 * const restrict pwhich,
	GFC_INTEGER_4 array_length __attribute__((unused)),
	GFC_INTEGER_4 bound_length __attribute__((unused)))
{
  eoshift1 (ret, array, h, pbound, pwhich, " ", 1);
}


void eoshift1_4_char4 (gfc_array_char * const restrict, 
	GFC_INTEGER_4,
	const gfc_array_char * const restrict, 
	const gfc_array_i4 * const restrict,
	const char * const restrict, 
	const GFC_INTEGER_4 * const restrict,
	GFC_INTEGER_4, GFC_INTEGER_4);
export_proto(eoshift1_4_char4);

void
eoshift1_4_char4 (gfc_array_char * const restrict ret,
	GFC_INTEGER_4 ret_length __attribute__((unused)),
	const gfc_array_char * const restrict array, 
	const gfc_array_i4 * const restrict h,
	const char *  const restrict pbound, 
	const GFC_INTEGER_4 * const restrict pwhich,
	GFC_INTEGER_4 array_length __attribute__((unused)),
	GFC_INTEGER_4 bound_length __attribute__((unused)))
{
  static const gfc_char4_t space = (unsigned char) ' ';
  eoshift1 (ret, array, h, pbound, pwhich,
	    (const char *) &space, sizeof (gfc_char4_t));
}

#endif
Commit	Line	Data
	1	/* Implementation of the EOSHIFT intrinsic
	2	Copyright (C) 2002-2025 Free Software Foundation, Inc.
	3	Contributed by Paul Brook <paul@nowt.org>
	4
	5	This file is part of the GNU Fortran runtime library (libgfortran).
	6
	7	Libgfortran is free software; you can redistribute it and/or
	8	modify it under the terms of the GNU General Public
	9	License as published by the Free Software Foundation; either
	10	version 3 of the License, or (at your option) any later version.
	11
	12	Libgfortran is distributed in the hope that it will be useful,
	13	but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	GNU General Public License for more details.
	16
	17	Under Section 7 of GPL version 3, you are granted additional
	18	permissions described in the GCC Runtime Library Exception, version
	19	3.1, as published by the Free Software Foundation.
	20
	21	You should have received a copy of the GNU General Public License and
	22	a copy of the GCC Runtime Library Exception along with this program;
	23	see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
	24	<http://www.gnu.org/licenses/>. */
	25
	26	#include "libgfortran.h"
	27	#include <string.h>
	28
	29
	30	#if defined (HAVE_GFC_INTEGER_4)
	31
	32	static void
	33	eoshift1 (gfc_array_char * const restrict ret,
	34	const gfc_array_char * const restrict array,
	35	const gfc_array_i4 * const restrict h,
	36	const char * const restrict pbound,
	37	const GFC_INTEGER_4 * const restrict pwhich,
	38	const char * filler, index_type filler_len)
	39	{
	40	/* r.* indicates the return array. */
	41	index_type rstride[GFC_MAX_DIMENSIONS];
	42	index_type rstride0;
	43	index_type roffset;
	44	char *rptr;
	45	char * restrict dest;
	46	/* s.* indicates the source array. */
	47	index_type sstride[GFC_MAX_DIMENSIONS];
	48	index_type sstride0;
	49	index_type soffset;
	50	const char *sptr;
	51	const char *src;
	52	/* h.* indicates the shift array. */
	53	index_type hstride[GFC_MAX_DIMENSIONS];
	54	index_type hstride0;
	55	const GFC_INTEGER_4 *hptr;
	56
	57	index_type count[GFC_MAX_DIMENSIONS];
	58	index_type extent[GFC_MAX_DIMENSIONS];
	59	index_type dim;
	60	index_type len;
	61	index_type n;
	62	index_type size;
	63	index_type arraysize;
	64	int which;
	65	GFC_INTEGER_4 sh;
	66	GFC_INTEGER_4 delta;
	67
	68	/* The compiler cannot figure out that these are set, initialize
	69	them to avoid warnings. */
	70	len = 0;
	71	soffset = 0;
	72	roffset = 0;
	73
	74	size = GFC_DESCRIPTOR_SIZE(array);
	75
	76	if (pwhich)
	77	which = *pwhich - 1;
	78	else
	79	which = 0;
	80
	81	extent[0] = 1;
	82	count[0] = 0;
	83
	84	arraysize = size0 ((array_t *) array);
	85	if (ret->base_addr == NULL)
	86	{
	87	ret->offset = 0;
	88	GFC_DTYPE_COPY(ret,array);
	89	for (index_type i = 0; i < GFC_DESCRIPTOR_RANK (array); i++)
	90	{
	91	index_type ub, str;
	92
	93	ub = GFC_DESCRIPTOR_EXTENT(array,i) - 1;
	94
	95	if (i == 0)
	96	str = 1;
	97	else
	98	str = GFC_DESCRIPTOR_EXTENT(ret,i-1)
	99	* GFC_DESCRIPTOR_STRIDE(ret,i-1);
	100
	101	GFC_DIMENSION_SET(ret->dim[i], 0, ub, str);
	102
	103	}
	104	/* xmallocarray allocates a single byte for zero size. */
	105	ret->base_addr = xmallocarray (arraysize, size);
	106
	107	}
	108	else if (unlikely (compile_options.bounds_check))
	109	{
	110	bounds_equal_extents ((array_t ) ret, (array_t ) array,
	111	"return value", "EOSHIFT");
	112	}
	113
	114	if (unlikely (compile_options.bounds_check))
	115	{
	116	bounds_reduced_extents ((array_t ) h, (array_t ) array, which,
	117	"SHIFT argument", "EOSHIFT");
	118	}
	119
	120	if (arraysize == 0)
	121	return;
	122
	123	n = 0;
	124	for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++)
	125	{
	126	if (dim == which)
	127	{
	128	roffset = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
	129	if (roffset == 0)
	130	roffset = size;
	131	soffset = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
	132	if (soffset == 0)
	133	soffset = size;
	134	len = GFC_DESCRIPTOR_EXTENT(array,dim);
	135	}
	136	else
	137	{
	138	count[n] = 0;
	139	extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim);
	140	rstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(ret,dim);
	141	sstride[n] = GFC_DESCRIPTOR_STRIDE_BYTES(array,dim);
	142
	143	hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n);
	144	n++;
	145	}
	146	}
	147	if (sstride[0] == 0)
	148	sstride[0] = size;
	149	if (rstride[0] == 0)
	150	rstride[0] = size;
	151	if (hstride[0] == 0)
	152	hstride[0] = 1;
	153
	154	dim = GFC_DESCRIPTOR_RANK (array);
	155	rstride0 = rstride[0];
	156	sstride0 = sstride[0];
	157	hstride0 = hstride[0];
	158	rptr = ret->base_addr;
	159	sptr = array->base_addr;
	160	hptr = h->base_addr;
	161
	162	while (rptr)
	163	{
	164	/* Do the shift for this dimension. */
	165	sh = *hptr;
	166	if (( sh >= 0 ? sh : -sh ) > len)
	167	{
	168	delta = len;
	169	sh = len;
	170	}
	171	else
	172	delta = (sh >= 0) ? sh: -sh;
	173
	174	if (sh > 0)
	175	{
	176	src = &sptr[delta * soffset];
	177	dest = rptr;
	178	}
	179	else
	180	{
	181	src = sptr;
	182	dest = &rptr[delta * roffset];
	183	}
	184
	185	/* If the elements are contiguous, perform a single block move. */
	186	if (soffset == size && roffset == size)
	187	{
	188	size_t chunk = size * (len - delta);
	189	memcpy (dest, src, chunk);
	190	dest += chunk;
	191	}
	192	else
	193	{
	194	for (n = 0; n < len - delta; n++)
	195	{
	196	memcpy (dest, src, size);
	197	dest += roffset;
	198	src += soffset;
	199	}
	200	}
	201	if (sh < 0)
	202	dest = rptr;
	203	n = delta;
	204
	205	if (pbound)
	206	while (n--)
	207	{
	208	memcpy (dest, pbound, size);
	209	dest += roffset;
	210	}
	211	else
	212	while (n--)
	213	{
	214	index_type i;
	215
	216	if (filler_len == 1)
	217	memset (dest, filler[0], size);
	218	else
	219	for (i = 0; i < size; i += filler_len)
	220	memcpy (&dest[i], filler, filler_len);
	221
	222	dest += roffset;
	223	}
	224
	225	/* Advance to the next section. */
	226	rptr += rstride0;
	227	sptr += sstride0;
	228	hptr += hstride0;
	229	count[0]++;
	230	n = 0;
	231	while (count[n] == extent[n])
	232	{
	233	/* When we get to the end of a dimension, reset it and increment
	234	the next dimension. */
	235	count[n] = 0;
	236	/* We could precalculate these products, but this is a less
	237	frequently used path so probably not worth it. */
	238	rptr -= rstride[n] * extent[n];
	239	sptr -= sstride[n] * extent[n];
	240	hptr -= hstride[n] * extent[n];
	241	n++;
	242	if (n >= dim - 1)
	243	{
	244	/* Break out of the loop. */
	245	rptr = NULL;
	246	break;
	247	}
	248	else
	249	{
	250	count[n]++;
	251	rptr += rstride[n];
	252	sptr += sstride[n];
	253	hptr += hstride[n];
	254	}
	255	}
	256	}
	257	}
	258
	259	void eoshift1_4 (gfc_array_char * const restrict,
	260	const gfc_array_char * const restrict,
	261	const gfc_array_i4 * const restrict, const char * const restrict,
	262	const GFC_INTEGER_4 * const restrict);
	263	export_proto(eoshift1_4);
	264
	265	void
	266	eoshift1_4 (gfc_array_char * const restrict ret,
	267	const gfc_array_char * const restrict array,
	268	const gfc_array_i4 * const restrict h,
	269	const char * const restrict pbound,
	270	const GFC_INTEGER_4 * const restrict pwhich)
	271	{
	272	eoshift1 (ret, array, h, pbound, pwhich, "\0", 1);
	273	}
	274
	275
	276	void eoshift1_4_char (gfc_array_char * const restrict,
	277	GFC_INTEGER_4,
	278	const gfc_array_char * const restrict,
	279	const gfc_array_i4 * const restrict,
	280	const char * const restrict,
	281	const GFC_INTEGER_4 * const restrict,
	282	GFC_INTEGER_4, GFC_INTEGER_4);
	283	export_proto(eoshift1_4_char);
	284
	285	void
	286	eoshift1_4_char (gfc_array_char * const restrict ret,
	287	GFC_INTEGER_4 ret_length __attribute__((unused)),
	288	const gfc_array_char * const restrict array,
	289	const gfc_array_i4 * const restrict h,
	290	const char * const restrict pbound,
	291	const GFC_INTEGER_4 * const restrict pwhich,
	292	GFC_INTEGER_4 array_length __attribute__((unused)),
	293	GFC_INTEGER_4 bound_length __attribute__((unused)))
	294	{
	295	eoshift1 (ret, array, h, pbound, pwhich, " ", 1);
	296	}
	297
	298
	299	void eoshift1_4_char4 (gfc_array_char * const restrict,
	300	GFC_INTEGER_4,
	301	const gfc_array_char * const restrict,
	302	const gfc_array_i4 * const restrict,
	303	const char * const restrict,
	304	const GFC_INTEGER_4 * const restrict,
	305	GFC_INTEGER_4, GFC_INTEGER_4);
	306	export_proto(eoshift1_4_char4);
	307
	308	void
	309	eoshift1_4_char4 (gfc_array_char * const restrict ret,
	310	GFC_INTEGER_4 ret_length __attribute__((unused)),
	311	const gfc_array_char * const restrict array,
	312	const gfc_array_i4 * const restrict h,
	313	const char * const restrict pbound,
	314	const GFC_INTEGER_4 * const restrict pwhich,
	315	GFC_INTEGER_4 array_length __attribute__((unused)),
	316	GFC_INTEGER_4 bound_length __attribute__((unused)))
	317	{
	318	static const gfc_char4_t space = (unsigned char) ' ';
	319	eoshift1 (ret, array, h, pbound, pwhich,
	320	(const char *) &space, sizeof (gfc_char4_t));
	321	}
	322
	323	#endif