diff options
Diffstat (limited to 'libgfortran/generated/norm2_r16.c')
| -rw-r--r-- | libgfortran/generated/norm2_r16.c | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/libgfortran/generated/norm2_r16.c b/libgfortran/generated/norm2_r16.c new file mode 100644 index 0000000000..5eaefb8a92 --- /dev/null +++ b/libgfortran/generated/norm2_r16.c @@ -0,0 +1,210 @@ +/* Implementation of the NORM2 intrinsic + Copyright (C) 2010-2017 Free Software Foundation, Inc. + Contributed by Tobias Burnus <burnus@net-b.de> + +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" + + + +#if defined (HAVE_GFC_REAL_16) && defined (HAVE_GFC_REAL_16) && (defined(GFC_REAL_16_IS_FLOAT128) || defined(HAVE_SQRTL)) && (defined(GFC_REAL_16_IS_FLOAT128) || defined(HAVE_FABSL)) + +#if defined(GFC_REAL_16_IS_FLOAT128) +#define MATHFUNC(funcname) funcname ## q +#else +#define MATHFUNC(funcname) funcname ## l +#endif + + +extern void norm2_r16 (gfc_array_r16 * const restrict, + gfc_array_r16 * const restrict, const index_type * const restrict); +export_proto(norm2_r16); + +void +norm2_r16 (gfc_array_r16 * const restrict retarray, + gfc_array_r16 * const restrict array, + const index_type * const restrict pdim) +{ + index_type count[GFC_MAX_DIMENSIONS]; + index_type extent[GFC_MAX_DIMENSIONS]; + index_type sstride[GFC_MAX_DIMENSIONS]; + index_type dstride[GFC_MAX_DIMENSIONS]; + const GFC_REAL_16 * restrict base; + GFC_REAL_16 * restrict dest; + index_type rank; + index_type n; + index_type len; + index_type delta; + index_type dim; + int continue_loop; + + /* Make dim zero based to avoid confusion. */ + dim = (*pdim) - 1; + rank = GFC_DESCRIPTOR_RANK (array) - 1; + + len = GFC_DESCRIPTOR_EXTENT(array,dim); + if (len < 0) + len = 0; + delta = GFC_DESCRIPTOR_STRIDE(array,dim); + + for (n = 0; n < dim; n++) + { + sstride[n] = GFC_DESCRIPTOR_STRIDE(array,n); + extent[n] = GFC_DESCRIPTOR_EXTENT(array,n); + + if (extent[n] < 0) + extent[n] = 0; + } + for (n = dim; n < rank; n++) + { + sstride[n] = GFC_DESCRIPTOR_STRIDE(array, n + 1); + extent[n] = GFC_DESCRIPTOR_EXTENT(array, n + 1); + + if (extent[n] < 0) + extent[n] = 0; + } + + if (retarray->base_addr == NULL) + { + size_t alloc_size, str; + + for (n = 0; n < rank; n++) + { + if (n == 0) + str = 1; + else + str = GFC_DESCRIPTOR_STRIDE(retarray,n-1) * extent[n-1]; + + GFC_DIMENSION_SET(retarray->dim[n], 0, extent[n] - 1, str); + + } + + retarray->offset = 0; + retarray->dtype = (array->dtype & ~GFC_DTYPE_RANK_MASK) | rank; + + alloc_size = GFC_DESCRIPTOR_STRIDE(retarray,rank-1) * extent[rank-1]; + + retarray->base_addr = xmallocarray (alloc_size, sizeof (GFC_REAL_16)); + if (alloc_size == 0) + { + /* Make sure we have a zero-sized array. */ + GFC_DIMENSION_SET(retarray->dim[0], 0, -1, 1); + return; + + } + } + else + { + if (rank != GFC_DESCRIPTOR_RANK (retarray)) + runtime_error ("rank of return array incorrect in" + " NORM intrinsic: is %ld, should be %ld", + (long int) (GFC_DESCRIPTOR_RANK (retarray)), + (long int) rank); + + if (unlikely (compile_options.bounds_check)) + bounds_ifunction_return ((array_t *) retarray, extent, + "return value", "NORM"); + } + + for (n = 0; n < rank; n++) + { + count[n] = 0; + dstride[n] = GFC_DESCRIPTOR_STRIDE(retarray,n); + if (extent[n] <= 0) + return; + } + + base = array->base_addr; + dest = retarray->base_addr; + + continue_loop = 1; + while (continue_loop) + { + const GFC_REAL_16 * restrict src; + GFC_REAL_16 result; + src = base; + { + + GFC_REAL_16 scale; + result = 0; + scale = 1; + if (len <= 0) + *dest = 0; + else + { + for (n = 0; n < len; n++, src += delta) + { + + if (*src != 0) + { + GFC_REAL_16 absX, val; + absX = MATHFUNC(fabs) (*src); + if (scale < absX) + { + val = scale / absX; + result = 1 + result * val * val; + scale = absX; + } + else + { + val = absX / scale; + result += val * val; + } + } + } + result = scale * MATHFUNC(sqrt) (result); + *dest = result; + } + } + /* Advance to the next element. */ + count[0]++; + base += sstride[0]; + dest += dstride[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. */ + base -= sstride[n] * extent[n]; + dest -= dstride[n] * extent[n]; + n++; + if (n >= rank) + { + /* Break out of the loop. */ + continue_loop = 0; + break; + } + else + { + count[n]++; + base += sstride[n]; + dest += dstride[n]; + } + } + } +} + +#endif |