diff options
Diffstat (limited to 'libgfortran/generated/spread_r4.c')
| -rw-r--r-- | libgfortran/generated/spread_r4.c | 277 |
1 files changed, 277 insertions, 0 deletions
diff --git a/libgfortran/generated/spread_r4.c b/libgfortran/generated/spread_r4.c new file mode 100644 index 00000000000..1569dbc09f3 --- /dev/null +++ b/libgfortran/generated/spread_r4.c @@ -0,0 +1,277 @@ +/* Special implementation of the SPREAD intrinsic + Copyright 2008 Free Software Foundation, Inc. + Contributed by Thomas Koenig <tkoenig@gcc.gnu.org>, based on + spread_generic.c written 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.) + +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. + +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 "libgfortran.h" +#include <stdlib.h> +#include <assert.h> +#include <string.h> + + +#if defined (HAVE_GFC_REAL_4) + +void +spread_r4 (gfc_array_r4 *ret, const gfc_array_r4 *source, + const index_type along, const index_type pncopies) +{ + /* r.* indicates the return array. */ + index_type rstride[GFC_MAX_DIMENSIONS]; + index_type rstride0; + index_type rdelta = 0; + index_type rrank; + index_type rs; + GFC_REAL_4 *rptr; + GFC_REAL_4 *dest; + /* s.* indicates the source array. */ + index_type sstride[GFC_MAX_DIMENSIONS]; + index_type sstride0; + index_type srank; + const GFC_REAL_4 *sptr; + + index_type count[GFC_MAX_DIMENSIONS]; + index_type extent[GFC_MAX_DIMENSIONS]; + index_type n; + index_type dim; + index_type ncopies; + + srank = GFC_DESCRIPTOR_RANK(source); + + rrank = srank + 1; + if (rrank > GFC_MAX_DIMENSIONS) + runtime_error ("return rank too large in spread()"); + + if (along > rrank) + runtime_error ("dim outside of rank in spread()"); + + ncopies = pncopies; + + if (ret->data == NULL) + { + /* The front end has signalled that we need to populate the + return array descriptor. */ + ret->dtype = (source->dtype & ~GFC_DTYPE_RANK_MASK) | rrank; + dim = 0; + rs = 1; + for (n = 0; n < rrank; n++) + { + ret->dim[n].stride = rs; + ret->dim[n].lbound = 0; + if (n == along - 1) + { + ret->dim[n].ubound = ncopies - 1; + rdelta = rs; + rs *= ncopies; + } + else + { + count[dim] = 0; + extent[dim] = source->dim[dim].ubound + 1 + - source->dim[dim].lbound; + sstride[dim] = source->dim[dim].stride; + rstride[dim] = rs; + + ret->dim[n].ubound = extent[dim]-1; + rs *= extent[dim]; + dim++; + } + } + ret->offset = 0; + if (rs > 0) + ret->data = internal_malloc_size (rs * sizeof(GFC_REAL_4)); + else + { + ret->data = internal_malloc_size (1); + return; + } + } + else + { + int zero_sized; + + zero_sized = 0; + + dim = 0; + if (GFC_DESCRIPTOR_RANK(ret) != rrank) + runtime_error ("rank mismatch in spread()"); + + if (compile_options.bounds_check) + { + for (n = 0; n < rrank; n++) + { + index_type ret_extent; + + ret_extent = ret->dim[n].ubound + 1 - ret->dim[n].lbound; + if (n == along - 1) + { + rdelta = ret->dim[n].stride; + + if (ret_extent != ncopies) + runtime_error("Incorrect extent in return value of SPREAD" + " intrinsic in dimension %ld: is %ld," + " should be %ld", (long int) n+1, + (long int) ret_extent, (long int) ncopies); + } + else + { + count[dim] = 0; + extent[dim] = source->dim[dim].ubound + 1 + - source->dim[dim].lbound; + if (ret_extent != extent[dim]) + runtime_error("Incorrect extent in return value of SPREAD" + " intrinsic in dimension %ld: is %ld," + " should be %ld", (long int) n+1, + (long int) ret_extent, + (long int) extent[dim]); + + if (extent[dim] <= 0) + zero_sized = 1; + sstride[dim] = source->dim[dim].stride; + rstride[dim] = ret->dim[n].stride; + dim++; + } + } + } + else + { + for (n = 0; n < rrank; n++) + { + if (n == along - 1) + { + rdelta = ret->dim[n].stride; + } + else + { + count[dim] = 0; + extent[dim] = source->dim[dim].ubound + 1 + - source->dim[dim].lbound; + if (extent[dim] <= 0) + zero_sized = 1; + sstride[dim] = source->dim[dim].stride; + rstride[dim] = ret->dim[n].stride; + dim++; + } + } + } + + if (zero_sized) + return; + + if (sstride[0] == 0) + sstride[0] = 1; + } + sstride0 = sstride[0]; + rstride0 = rstride[0]; + rptr = ret->data; + sptr = source->data; + + while (sptr) + { + /* Spread this element. */ + dest = rptr; + for (n = 0; n < ncopies; n++) + { + *dest = *sptr; + dest += rdelta; + } + /* Advance to the next element. */ + sptr += sstride0; + rptr += rstride0; + 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. */ + sptr -= sstride[n] * extent[n]; + rptr -= rstride[n] * extent[n]; + n++; + if (n >= srank) + { + /* Break out of the loop. */ + sptr = NULL; + break; + } + else + { + count[n]++; + sptr += sstride[n]; + rptr += rstride[n]; + } + } + } +} + +/* This version of spread_internal treats the special case of a scalar + source. This is much simpler than the more general case above. */ + +void +spread_scalar_r4 (gfc_array_r4 *ret, const GFC_REAL_4 *source, + const index_type along, const index_type pncopies) +{ + int n; + int ncopies = pncopies; + GFC_REAL_4 * dest; + index_type stride; + + if (GFC_DESCRIPTOR_RANK (ret) != 1) + runtime_error ("incorrect destination rank in spread()"); + + if (along > 1) + runtime_error ("dim outside of rank in spread()"); + + if (ret->data == NULL) + { + ret->data = internal_malloc_size (ncopies * sizeof (GFC_REAL_4)); + ret->offset = 0; + ret->dim[0].stride = 1; + ret->dim[0].lbound = 0; + ret->dim[0].ubound = ncopies - 1; + } + else + { + if (ncopies - 1 > (ret->dim[0].ubound - ret->dim[0].lbound) + / ret->dim[0].stride) + runtime_error ("dim too large in spread()"); + } + + dest = ret->data; + stride = ret->dim[0].stride; + + for (n = 0; n < ncopies; n++) + { + *dest = *source; + dest += stride; + } +} + +#endif |
