1 /* Measure memchr functions.
2 Copyright (C) 2013-2020 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 <https://www.gnu.org/licenses/>. */
23 #define TEST_NAME "rawmemchr"
24 #include "bench-string.h"
26 typedef char *(*proto_t
) (const char *, int);
29 generic_rawmemchr (const char *s
, int c
)
32 return memchr (s
, c
, PTRDIFF_MAX
);
33 return (char *)s
+ strlen (s
);
37 IMPL (generic_rawmemchr
, 0)
40 do_one_test (impl_t
*impl
, const char *s
, int c
, char *exp_res
)
42 size_t i
, iters
= INNER_LOOP_ITERS_LARGE
* 4;
43 timing_t start
, stop
, cur
;
44 char *res
= CALL (impl
, s
, c
);
47 error (0, 0, "Wrong result in function %s %p %p", impl
->name
,
54 for (i
= 0; i
< iters
; ++i
)
60 TIMING_DIFF (cur
, start
, stop
);
62 TIMING_PRINT_MEAN ((double) cur
, (double) iters
);
66 do_test (size_t align
, size_t pos
, size_t len
, int seek_char
)
72 if (align
+ len
>= page_size
)
75 for (i
= 0; i
< len
; ++i
)
77 buf1
[align
+ i
] = 1 + 23 * i
% 127;
78 if (buf1
[align
+ i
] == seek_char
)
79 buf1
[align
+ i
] = seek_char
+ 1;
81 buf1
[align
+ len
] = 0;
85 buf1
[align
+ pos
] = seek_char
;
86 buf1
[align
+ len
] = -seek_char
;
87 result
= (char *) (buf1
+ align
+ pos
);
89 printf ("Length %4zd, alignment %2zd:", pos
, align
);
91 FOR_EACH_IMPL (impl
, 0)
92 do_one_test (impl
, (char *) (buf1
+ align
), seek_char
, result
);
105 FOR_EACH_IMPL (impl
, 0)
106 printf ("\t%s", impl
->name
);
109 for (i
= 1; i
< 7; ++i
)
111 do_test (0, 16 << i
, 2048, 23);
112 do_test (i
, 64, 256, 23);
113 do_test (0, 16 << i
, 2048, 0);
114 do_test (i
, 64, 256, 0);
116 for (i
= 1; i
< 32; ++i
)
118 do_test (0, i
, i
+ 1, 23);
119 do_test (0, i
, i
+ 1, 0);
125 #include <support/test-driver.c>