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- /* Implementation of the CSHIFT intrinsic
- Copyright (C) 2003-2015 Free Software Foundation, Inc.
- Contributed by Feng Wang <wf_cs@yahoo.com>
- 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.
- Ligbfortran 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 <stdlib.h>
- #include <assert.h>
- #include <string.h>
- #if defined (HAVE_GFC_INTEGER_16)
- static void
- cshift1 (gfc_array_char * const restrict ret,
- const gfc_array_char * const restrict array,
- const gfc_array_i16 * const restrict h,
- const GFC_INTEGER_16 * const restrict pwhich)
- {
- /* r.* indicates the return array. */
- index_type rstride[GFC_MAX_DIMENSIONS];
- index_type rstride0;
- index_type roffset;
- char *rptr;
- char *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_16 *hptr;
- index_type count[GFC_MAX_DIMENSIONS];
- index_type extent[GFC_MAX_DIMENSIONS];
- index_type dim;
- index_type len;
- index_type n;
- int which;
- GFC_INTEGER_16 sh;
- index_type arraysize;
- index_type size;
- if (pwhich)
- which = *pwhich - 1;
- else
- which = 0;
- if (which < 0 || (which + 1) > GFC_DESCRIPTOR_RANK (array))
- runtime_error ("Argument 'DIM' is out of range in call to 'CSHIFT'");
- size = GFC_DESCRIPTOR_SIZE(array);
- arraysize = size0 ((array_t *)array);
- if (ret->base_addr == NULL)
- {
- int i;
- ret->base_addr = xmallocarray (arraysize, size);
- ret->offset = 0;
- ret->dtype = array->dtype;
- for (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);
- }
- }
- else if (unlikely (compile_options.bounds_check))
- {
- bounds_equal_extents ((array_t *) ret, (array_t *) array,
- "return value", "CSHIFT");
- }
- if (unlikely (compile_options.bounds_check))
- {
- bounds_reduced_extents ((array_t *) h, (array_t *) array, which,
- "SHIFT argument", "CSHIFT");
- }
- if (arraysize == 0)
- return;
- extent[0] = 1;
- count[0] = 0;
- n = 0;
- /* Initialized for avoiding compiler warnings. */
- roffset = size;
- soffset = size;
- len = 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;
- sh = (div (sh, len)).rem;
- if (sh < 0)
- sh += len;
- src = &sptr[sh * soffset];
- dest = rptr;
- for (n = 0; n < len; n++)
- {
- memcpy (dest, src, size);
- dest += roffset;
- if (n == len - sh - 1)
- src = sptr;
- else
- src += soffset;
- }
- /* 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 cshift1_16 (gfc_array_char * const restrict,
- const gfc_array_char * const restrict,
- const gfc_array_i16 * const restrict,
- const GFC_INTEGER_16 * const restrict);
- export_proto(cshift1_16);
- void
- cshift1_16 (gfc_array_char * const restrict ret,
- const gfc_array_char * const restrict array,
- const gfc_array_i16 * const restrict h,
- const GFC_INTEGER_16 * const restrict pwhich)
- {
- cshift1 (ret, array, h, pwhich);
- }
- void cshift1_16_char (gfc_array_char * const restrict ret,
- GFC_INTEGER_4,
- const gfc_array_char * const restrict array,
- const gfc_array_i16 * const restrict h,
- const GFC_INTEGER_16 * const restrict pwhich,
- GFC_INTEGER_4);
- export_proto(cshift1_16_char);
- void
- cshift1_16_char (gfc_array_char * const restrict ret,
- GFC_INTEGER_4 ret_length __attribute__((unused)),
- const gfc_array_char * const restrict array,
- const gfc_array_i16 * const restrict h,
- const GFC_INTEGER_16 * const restrict pwhich,
- GFC_INTEGER_4 array_length __attribute__((unused)))
- {
- cshift1 (ret, array, h, pwhich);
- }
- void cshift1_16_char4 (gfc_array_char * const restrict ret,
- GFC_INTEGER_4,
- const gfc_array_char * const restrict array,
- const gfc_array_i16 * const restrict h,
- const GFC_INTEGER_16 * const restrict pwhich,
- GFC_INTEGER_4);
- export_proto(cshift1_16_char4);
- void
- cshift1_16_char4 (gfc_array_char * const restrict ret,
- GFC_INTEGER_4 ret_length __attribute__((unused)),
- const gfc_array_char * const restrict array,
- const gfc_array_i16 * const restrict h,
- const GFC_INTEGER_16 * const restrict pwhich,
- GFC_INTEGER_4 array_length __attribute__((unused)))
- {
- cshift1 (ret, array, h, pwhich);
- }
- #endif
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