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- /* Implementation of the MINLOC intrinsic
- Copyright (C) 2017-2022 Free Software Foundation, Inc.
- Contributed by Thomas Koenig
- 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 <stdlib.h>
- #include <string.h>
- #include <assert.h>
- #if defined (HAVE_GFC_UINTEGER_4) && defined (HAVE_GFC_INTEGER_8)
- static inline int
- compare_fcn (const GFC_UINTEGER_4 *a, const GFC_UINTEGER_4 *b, gfc_charlen_type n)
- {
- if (sizeof (GFC_UINTEGER_4) == 1)
- return memcmp (a, b, n);
- else
- return memcmp_char4 (a, b, n);
- }
- extern GFC_INTEGER_8 minloc2_8_s4 (gfc_array_s4 * const restrict, GFC_LOGICAL_4 back,
- gfc_charlen_type);
- export_proto(minloc2_8_s4);
- GFC_INTEGER_8
- minloc2_8_s4 (gfc_array_s4 * const restrict array, GFC_LOGICAL_4 back,
- gfc_charlen_type len)
- {
- index_type ret;
- index_type sstride;
- index_type extent;
- const GFC_UINTEGER_4 *src;
- const GFC_UINTEGER_4 *minval;
- index_type i;
- extent = GFC_DESCRIPTOR_EXTENT(array,0);
- if (extent <= 0)
- return 0;
- sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
- ret = 1;
- src = array->base_addr;
- minval = NULL;
- for (i=1; i<=extent; i++)
- {
- if (minval == NULL || (back ? compare_fcn (src, minval, len) <= 0 :
- compare_fcn (src, minval, len) < 0))
- {
- ret = i;
- minval = src;
- }
- src += sstride;
- }
- return ret;
- }
- extern GFC_INTEGER_8 mminloc2_8_s4 (gfc_array_s4 * const restrict,
- gfc_array_l1 *const restrict mask, GFC_LOGICAL_4 back,
- gfc_charlen_type);
- export_proto(mminloc2_8_s4);
- GFC_INTEGER_8
- mminloc2_8_s4 (gfc_array_s4 * const restrict array,
- gfc_array_l1 * const restrict mask, GFC_LOGICAL_4 back,
- gfc_charlen_type len)
- {
- index_type ret;
- index_type sstride;
- index_type extent;
- const GFC_UINTEGER_4 *src;
- const GFC_UINTEGER_4 *maxval;
- index_type i, j;
- GFC_LOGICAL_1 *mbase;
- int mask_kind;
- index_type mstride;
- extent = GFC_DESCRIPTOR_EXTENT(array,0);
- if (extent <= 0)
- return 0;
- sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len;
- mask_kind = GFC_DESCRIPTOR_SIZE (mask);
- mbase = mask->base_addr;
- if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8
- #ifdef HAVE_GFC_LOGICAL_16
- || mask_kind == 16
- #endif
- )
- mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind);
- else
- internal_error (NULL, "Funny sized logical array");
- mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0);
- /* Search for the first occurrence of a true element in mask. */
- for (j=0; j<extent; j++)
- {
- if (*mbase)
- break;
- mbase += mstride;
- }
- if (j == extent)
- return 0;
- ret = j + 1;
- src = array->base_addr + j * sstride;
- maxval = src;
- for (i=j+1; i<=extent; i++)
- {
- if (*mbase && (back ? compare_fcn (src, maxval, len) <= 0 :
- compare_fcn (src, maxval, len) < 0))
- {
- ret = i;
- maxval = src;
- }
- src += sstride;
- mbase += mstride;
- }
- return ret;
- }
- extern GFC_INTEGER_8 sminloc2_8_s4 (gfc_array_s4 * const restrict,
- GFC_LOGICAL_4 *mask, GFC_LOGICAL_4 back, gfc_charlen_type);
- export_proto(sminloc2_8_s4);
- GFC_INTEGER_8
- sminloc2_8_s4 (gfc_array_s4 * const restrict array,
- GFC_LOGICAL_4 *mask, GFC_LOGICAL_4 back, gfc_charlen_type len)
- {
- if (mask)
- return minloc2_8_s4 (array, len, back);
- else
- return 0;
- }
- #endif
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