1 /* Measure memchr functions.
2 Copyright (C) 2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
20 #define TEST_NAME "memchr"
21 #include "bench-string.h"
23 typedef char *(*proto_t
) (const char *, int, size_t);
24 char *simple_memchr (const char *, int, size_t);
26 IMPL (simple_memchr
, 0)
30 simple_memchr (const char *s
, int c
, size_t n
)
34 return (char *) s
- 1;
39 do_one_test (impl_t
*impl
, const char *s
, int c
, size_t n
, char *exp_res
)
41 char *res
= CALL (impl
, s
, c
, n
);
44 error (0, 0, "Wrong result in function %s %p %p", impl
->name
,
52 hp_timing_t start
__attribute ((unused
));
53 hp_timing_t stop
__attribute ((unused
));
54 hp_timing_t best_time
= ~ (hp_timing_t
) 0;
57 for (i
= 0; i
< 32; ++i
)
59 HP_TIMING_NOW (start
);
62 HP_TIMING_BEST (best_time
, start
, stop
);
65 printf ("\t%zd", (size_t) best_time
);
70 do_test (size_t align
, size_t pos
, size_t len
, int seek_char
)
76 if (align
+ len
>= page_size
)
79 for (i
= 0; i
< len
; ++i
)
81 buf1
[align
+ i
] = 1 + 23 * i
% 127;
82 if (buf1
[align
+ i
] == seek_char
)
83 buf1
[align
+ i
] = seek_char
+ 1;
85 buf1
[align
+ len
] = 0;
89 buf1
[align
+ pos
] = seek_char
;
90 buf1
[align
+ len
] = -seek_char
;
91 result
= (char *) (buf1
+ align
+ pos
);
96 buf1
[align
+ len
] = seek_char
;
100 printf ("Length %4zd, alignment %2zd:", pos
, align
);
102 FOR_EACH_IMPL (impl
, 0)
103 do_one_test (impl
, (char *) (buf1
+ align
), seek_char
, len
, result
);
117 FOR_EACH_IMPL (impl
, 0)
118 printf ("\t%s", impl
->name
);
121 for (i
= 1; i
< 8; ++i
)
123 do_test (0, 16 << i
, 2048, 23);
124 do_test (i
, 64, 256, 23);
125 do_test (0, 16 << i
, 2048, 0);
126 do_test (i
, 64, 256, 0);
128 for (i
= 1; i
< 32; ++i
)
130 do_test (0, i
, i
+ 1, 23);
131 do_test (0, i
, i
+ 1, 0);
137 #include "../test-skeleton.c"