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ddc9995b | 1 | /* Implementation of the MINLOC intrinsic |
85ec4feb | 2 | Copyright (C) 2017-2018 Free Software Foundation, Inc. |
ddc9995b TK |
3 | Contributed by Thomas Koenig |
4 | ||
5 | This file is part of the GNU Fortran runtime library (libgfortran). | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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. | |
20 | ||
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/>. */ | |
25 | ||
26 | #include "libgfortran.h" | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
64b1806b | 29 | #include <assert.h> |
ddc9995b TK |
30 | |
31 | #if defined (HAVE_GFC_INTEGER_4) && defined (HAVE_GFC_INTEGER_16) | |
32 | ||
33 | static inline int | |
207180e1 | 34 | compare_fcn (const GFC_INTEGER_4 *a, const GFC_INTEGER_4 *b, gfc_charlen_type n) |
ddc9995b TK |
35 | { |
36 | if (sizeof (GFC_INTEGER_4) == 1) | |
37 | return memcmp (a, b, n); | |
38 | else | |
39 | return memcmp_char4 (a, b, n); | |
40 | } | |
41 | ||
64b1806b TK |
42 | extern GFC_INTEGER_16 minloc2_16_s4 (gfc_array_s4 * const restrict, GFC_LOGICAL_4 back, |
43 | gfc_charlen_type); | |
ddc9995b TK |
44 | export_proto(minloc2_16_s4); |
45 | ||
46 | GFC_INTEGER_16 | |
64b1806b TK |
47 | minloc2_16_s4 (gfc_array_s4 * const restrict array, GFC_LOGICAL_4 back, |
48 | gfc_charlen_type len) | |
ddc9995b TK |
49 | { |
50 | index_type ret; | |
51 | index_type sstride; | |
52 | index_type extent; | |
53 | const GFC_INTEGER_4 *src; | |
54 | const GFC_INTEGER_4 *maxval; | |
55 | index_type i; | |
56 | ||
64b1806b | 57 | assert(back == 0); |
ddc9995b TK |
58 | extent = GFC_DESCRIPTOR_EXTENT(array,0); |
59 | if (extent <= 0) | |
60 | return 0; | |
61 | ||
62 | sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len; | |
63 | ||
64 | ret = 1; | |
65 | src = array->base_addr; | |
66 | maxval = src; | |
67 | for (i=2; i<=extent; i++) | |
68 | { | |
69 | src += sstride; | |
70 | if (compare_fcn (src, maxval, len) < 0) | |
71 | { | |
72 | ret = i; | |
73 | maxval = src; | |
74 | } | |
75 | } | |
76 | return ret; | |
77 | } | |
78 | ||
79 | extern GFC_INTEGER_16 mminloc2_16_s4 (gfc_array_s4 * const restrict, | |
64b1806b TK |
80 | gfc_array_l1 *const restrict mask, GFC_LOGICAL_4 back, |
81 | gfc_charlen_type); | |
ddc9995b TK |
82 | export_proto(mminloc2_16_s4); |
83 | ||
84 | GFC_INTEGER_16 | |
85 | mminloc2_16_s4 (gfc_array_s4 * const restrict array, | |
64b1806b TK |
86 | gfc_array_l1 * const restrict mask, GFC_LOGICAL_4 back, |
87 | gfc_charlen_type len) | |
ddc9995b TK |
88 | { |
89 | index_type ret; | |
90 | index_type sstride; | |
91 | index_type extent; | |
92 | const GFC_INTEGER_4 *src; | |
93 | const GFC_INTEGER_4 *maxval; | |
94 | index_type i, j; | |
95 | GFC_LOGICAL_1 *mbase; | |
96 | int mask_kind; | |
97 | index_type mstride; | |
98 | ||
64b1806b | 99 | assert (back == 0); |
ddc9995b TK |
100 | extent = GFC_DESCRIPTOR_EXTENT(array,0); |
101 | if (extent <= 0) | |
102 | return 0; | |
103 | ||
104 | sstride = GFC_DESCRIPTOR_STRIDE(array,0) * len; | |
105 | ||
106 | mask_kind = GFC_DESCRIPTOR_SIZE (mask); | |
107 | mbase = mask->base_addr; | |
108 | ||
109 | if (mask_kind == 1 || mask_kind == 2 || mask_kind == 4 || mask_kind == 8 | |
110 | #ifdef HAVE_GFC_LOGICAL_16 | |
111 | || mask_kind == 16 | |
112 | #endif | |
113 | ) | |
114 | mbase = GFOR_POINTER_TO_L1 (mbase, mask_kind); | |
115 | else | |
116 | internal_error (NULL, "Funny sized logical array"); | |
117 | ||
118 | mstride = GFC_DESCRIPTOR_STRIDE_BYTES(mask,0); | |
119 | ||
120 | /* Search for the first occurrence of a true element in mask. */ | |
121 | for (j=0; j<extent; j++) | |
122 | { | |
123 | if (*mbase) | |
124 | break; | |
125 | mbase += mstride; | |
126 | } | |
127 | ||
128 | if (j == extent) | |
129 | return 0; | |
130 | ||
131 | ret = j + 1; | |
132 | src = array->base_addr + j * sstride; | |
133 | maxval = src; | |
134 | ||
135 | for (i=j+1; i<=extent; i++) | |
136 | { | |
137 | if (*mbase && compare_fcn (src, maxval, len) < 0) | |
138 | { | |
139 | ret = i; | |
140 | maxval = src; | |
141 | } | |
142 | src += sstride; | |
143 | mbase += mstride; | |
144 | } | |
145 | return ret; | |
146 | } | |
147 | ||
148 | extern GFC_INTEGER_16 sminloc2_16_s4 (gfc_array_s4 * const restrict, | |
64b1806b | 149 | GFC_LOGICAL_4 *mask, GFC_LOGICAL_4 back, gfc_charlen_type); |
ddc9995b TK |
150 | export_proto(sminloc2_16_s4); |
151 | ||
152 | GFC_INTEGER_16 | |
153 | sminloc2_16_s4 (gfc_array_s4 * const restrict array, | |
64b1806b | 154 | GFC_LOGICAL_4 *mask, GFC_LOGICAL_4 back, gfc_charlen_type len) |
ddc9995b TK |
155 | { |
156 | if (mask) | |
64b1806b | 157 | return minloc2_16_s4 (array, len, back); |
ddc9995b TK |
158 | else |
159 | return 0; | |
160 | } | |
161 | ||
162 | #endif |