diff options
Diffstat (limited to 'libgfortran/generated/cshift1_16_r8.c')
| -rw-r--r-- | libgfortran/generated/cshift1_16_r8.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/libgfortran/generated/cshift1_16_r8.c b/libgfortran/generated/cshift1_16_r8.c new file mode 100644 index 00000000000..ad0ec5ee27c --- /dev/null +++ b/libgfortran/generated/cshift1_16_r8.c @@ -0,0 +1,193 @@ +/* Implementation of the CSHIFT intrinsic. + Copyright (C) 2017 Free Software Foundation, Inc. + Contributed by Thomas Koenig <tkoenig@gcc.gnu.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 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_REAL_8) && defined (HAVE_GFC_INTEGER_16) + +void +cshift1_16_r8 (gfc_array_r8 * const restrict ret, + const gfc_array_r8 * 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; + GFC_REAL_8 *rptr; + GFC_REAL_8 *dest; + /* s.* indicates the source array. */ + index_type sstride[GFC_MAX_DIMENSIONS]; + index_type sstride0; + index_type soffset; + const GFC_REAL_8 *sptr; + const GFC_REAL_8 *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 rs_ex[GFC_MAX_DIMENSIONS]; + index_type ss_ex[GFC_MAX_DIMENSIONS]; + index_type hs_ex[GFC_MAX_DIMENSIONS]; + + index_type dim; + index_type len; + index_type n; + int which; + GFC_INTEGER_16 sh; + + /* Bounds checking etc is already done by the caller. */ + + if (pwhich) + which = *pwhich - 1; + else + which = 0; + + extent[0] = 1; + count[0] = 0; + n = 0; + + /* Initialized for avoiding compiler warnings. */ + roffset = 1; + soffset = 1; + len = 0; + + for (dim = 0; dim < GFC_DESCRIPTOR_RANK (array); dim++) + { + if (dim == which) + { + roffset = GFC_DESCRIPTOR_STRIDE(ret,dim); + if (roffset == 0) + roffset = 1; + soffset = GFC_DESCRIPTOR_STRIDE(array,dim); + if (soffset == 0) + soffset = 1; + len = GFC_DESCRIPTOR_EXTENT(array,dim); + } + else + { + count[n] = 0; + extent[n] = GFC_DESCRIPTOR_EXTENT(array,dim); + rstride[n] = GFC_DESCRIPTOR_STRIDE(ret,dim); + sstride[n] = GFC_DESCRIPTOR_STRIDE(array,dim); + hstride[n] = GFC_DESCRIPTOR_STRIDE(h,n); + rs_ex[n] = rstride[n] * extent[n]; + ss_ex[n] = sstride[n] * extent[n]; + hs_ex[n] = hstride[n] * extent[n]; + n++; + } + } + if (sstride[0] == 0) + sstride[0] = 1; + if (rstride[0] == 0) + rstride[0] = 1; + 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; + /* Normal case should be -len < sh < len; try to + avoid the expensive remainder operation if possible. */ + if (sh < 0) + sh += len; + if (unlikely(sh >= len || sh < 0)) + { + sh = sh % len; + if (sh < 0) + sh += len; + } + src = &sptr[sh * soffset]; + dest = rptr; + if (soffset == 1 && roffset == 1) + { + size_t len1 = sh * sizeof (GFC_REAL_8); + size_t len2 = (len - sh) * sizeof (GFC_REAL_8); + memcpy (rptr, sptr + sh, len2); + memcpy (rptr + (len - sh), sptr, len1); + } + else + { + for (n = 0; n < len - sh; n++) + { + *dest = *src; + dest += roffset; + src += soffset; + } + for (src = sptr, n = 0; n < sh; n++) + { + *dest = *src; + dest += roffset; + 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; + rptr -= rs_ex[n]; + sptr -= ss_ex[n]; + hptr -= hs_ex[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]; + } + } + } +} + +#endif |