1 /* Implementation of the MAXLOC intrinsic
2 Copyright (C) 2017-2018 Free Software Foundation, Inc.
3 Contributed by Thomas Koenig
5 This file is part of the GNU Fortran runtime library (libgfortran).
7 Libgfortran is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public
9 License as published by the Free Software Foundation; either
10 version 3 of the License, or (at your option) any later version.
12 Libgfortran is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 Under Section 7 of GPL version 3, you are granted additional
18 permissions described in the GCC Runtime Library Exception, version
19 3.1, as published by the Free Software Foundation.
21 You should have received a copy of the GNU General Public License and
22 a copy of the GCC Runtime Library Exception along with this program;
23 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24 <http://www.gnu.org/licenses/>. */
26 #include "libgfortran.h"
31 #if defined (HAVE_GFC_INTEGER_4) && defined (HAVE_GFC_INTEGER_4)
34 compare_fcn (const GFC_INTEGER_4
*a
, const GFC_INTEGER_4
*b
, gfc_charlen_type n
)
36 if (sizeof (GFC_INTEGER_4
) == 1)
37 return memcmp (a
, b
, n
);
39 return memcmp_char4 (a
, b
, n
);
42 extern GFC_INTEGER_4
maxloc2_4_s4 (gfc_array_s4
* const restrict
, GFC_LOGICAL_4 back
,
44 export_proto(maxloc2_4_s4
);
47 maxloc2_4_s4 (gfc_array_s4
* const restrict array
, GFC_LOGICAL_4 back
, gfc_charlen_type len
)
52 const GFC_INTEGER_4
*src
;
53 const GFC_INTEGER_4
*maxval
;
56 extent
= GFC_DESCRIPTOR_EXTENT(array
,0);
60 sstride
= GFC_DESCRIPTOR_STRIDE(array
,0) * len
;
63 src
= array
->base_addr
;
65 for (i
=1; i
<=extent
; i
++)
67 if (maxval
== NULL
|| (back
? compare_fcn (src
, maxval
, len
) >= 0 :
68 compare_fcn (src
, maxval
, len
) > 0))
78 extern GFC_INTEGER_4
mmaxloc2_4_s4 (gfc_array_s4
* const restrict
,
79 gfc_array_l1
*const restrict mask
, GFC_LOGICAL_4 back
,
81 export_proto(mmaxloc2_4_s4
);
84 mmaxloc2_4_s4 (gfc_array_s4
* const restrict array
,
85 gfc_array_l1
* const restrict mask
, GFC_LOGICAL_4 back
,
91 const GFC_INTEGER_4
*src
;
92 const GFC_INTEGER_4
*maxval
;
98 extent
= GFC_DESCRIPTOR_EXTENT(array
,0);
102 sstride
= GFC_DESCRIPTOR_STRIDE(array
,0) * len
;
104 mask_kind
= GFC_DESCRIPTOR_SIZE (mask
);
105 mbase
= mask
->base_addr
;
107 if (mask_kind
== 1 || mask_kind
== 2 || mask_kind
== 4 || mask_kind
== 8
108 #ifdef HAVE_GFC_LOGICAL_16
112 mbase
= GFOR_POINTER_TO_L1 (mbase
, mask_kind
);
114 internal_error (NULL
, "Funny sized logical array");
116 mstride
= GFC_DESCRIPTOR_STRIDE_BYTES(mask
,0);
118 /* Search for the first occurrence of a true element in mask. */
119 for (j
=0; j
<extent
; j
++)
130 src
= array
->base_addr
+ j
* sstride
;
133 for (i
=j
+1; i
<=extent
; i
++)
135 if (*mbase
&& (back
? compare_fcn (src
, maxval
, len
) >= 0 :
136 compare_fcn (src
, maxval
, len
) > 0))
147 extern GFC_INTEGER_4
smaxloc2_4_s4 (gfc_array_s4
* const restrict
,
148 GFC_LOGICAL_4
*mask
, GFC_LOGICAL_4 back
, gfc_charlen_type
);
149 export_proto(smaxloc2_4_s4
);
152 smaxloc2_4_s4 (gfc_array_s4
* const restrict array
,
153 GFC_LOGICAL_4
*mask
, GFC_LOGICAL_4 back
, gfc_charlen_type len
)
156 return maxloc2_4_s4 (array
, len
, back
);