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Diffstat (limited to 'libc/benchtests/bench-strrchr.c')
| -rw-r--r-- | libc/benchtests/bench-strrchr.c | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/libc/benchtests/bench-strrchr.c b/libc/benchtests/bench-strrchr.c new file mode 100644 index 000000000..400ac80e2 --- /dev/null +++ b/libc/benchtests/bench-strrchr.c @@ -0,0 +1,190 @@ +/* Measure STRCHR functions. + Copyright (C) 2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#define TEST_MAIN +#ifdef WIDE +# define TEST_NAME "wcsrchr" +#else +# define TEST_NAME "strrchr" +#endif +#include "bench-string.h" + +#ifdef WIDE +# include <wchar.h> +# define SIMPLE_STRRCHR simple_wcsrchr +# define STRRCHR wcsrchr +# define CHAR wchar_t +# define UCHAR wchar_t +# define BIG_CHAR WCHAR_MAX +# define SMALL_CHAR 1273 +#else +# define SIMPLE_STRRCHR simple_strrchr +# define STRRCHR strrchr +# define CHAR char +# define UCHAR unsigned char +# define BIG_CHAR CHAR_MAX +# define SMALL_CHAR 127 +#endif + +typedef CHAR *(*proto_t) (const CHAR *, int); +CHAR *SIMPLE_STRRCHR (const CHAR *, int); + +IMPL (SIMPLE_STRRCHR, 0) +IMPL (STRRCHR, 1) + +CHAR * +SIMPLE_STRRCHR (const CHAR *s, int c) +{ + const CHAR *ret = NULL; + + for (; *s != '\0'; ++s) + if (*s == (CHAR) c) + ret = s; + + return (CHAR *) (c == '\0' ? s : ret); +} + +static void +do_one_test (impl_t *impl, const CHAR *s, int c, CHAR *exp_res) +{ + CHAR *res = CALL (impl, s, c); + if (res != exp_res) + { + error (0, 0, "Wrong result in function %s %p %p", impl->name, + res, exp_res); + ret = 1; + return; + } + + if (HP_TIMING_AVAIL) + { + hp_timing_t start __attribute ((unused)); + hp_timing_t stop __attribute ((unused)); + hp_timing_t best_time = ~ (hp_timing_t) 0; + size_t i; + + for (i = 0; i < 32; ++i) + { + HP_TIMING_NOW (start); + CALL (impl, s, c); + HP_TIMING_NOW (stop); + HP_TIMING_BEST (best_time, start, stop); + } + + printf ("\t%zd", (size_t) best_time); + } +} + +static void +do_test (size_t align, size_t pos, size_t len, int seek_char, int max_char) +/* For wcsrchr: align here means align not in bytes, + but in wchar_ts, in bytes it will equal to align * (sizeof (wchar_t)) + len for wcschr here isn't in bytes but it's number of wchar_t symbols. */ +{ + size_t i; + CHAR *result; + CHAR *buf = (CHAR *) buf1; + + align &= 7; + if ( (align + len) * sizeof(CHAR) >= page_size) + return; + + for (i = 0; i < len; ++i) + { + buf[align + i] = (random () * random ()) & max_char; + if (!buf[align + i]) + buf[align + i] = (random () * random ()) & max_char; + if (!buf[align + i]) + buf[align + i] = 1; + if ((i > pos || pos >= len) && buf[align + i] == seek_char) + buf[align + i] = seek_char + 10 + (random () & 15); + } + buf[align + len] = 0; + + if (pos < len) + { + buf[align + pos] = seek_char; + result = (CHAR *) (buf + align + pos); + } + else if (seek_char == 0) + result = (CHAR *) (buf + align + len); + else + result = NULL; + + if (HP_TIMING_AVAIL) + printf ("Length %4zd, alignment in bytes %2zd:", pos, align * sizeof(CHAR)); + + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, (CHAR *) (buf + align), seek_char, result); + + if (HP_TIMING_AVAIL) + putchar ('\n'); +} + +int +test_main (void) +{ + size_t i; + + test_init (); + + printf ("%20s", ""); + FOR_EACH_IMPL (impl, 0) + printf ("\t%s", impl->name); + putchar ('\n'); + + for (i = 1; i < 8; ++i) + { + do_test (0, 16 << i, 2048, 23, SMALL_CHAR); + do_test (i, 16 << i, 2048, 23, SMALL_CHAR); + } + + for (i = 1; i < 8; ++i) + { + do_test (i, 64, 256, 23, SMALL_CHAR); + do_test (i, 64, 256, 23, BIG_CHAR); + } + + for (i = 0; i < 32; ++i) + { + do_test (0, i, i + 1, 23, SMALL_CHAR); + do_test (0, i, i + 1, 23, BIG_CHAR); + } + + for (i = 1; i < 8; ++i) + { + do_test (0, 16 << i, 2048, 0, SMALL_CHAR); + do_test (i, 16 << i, 2048, 0, SMALL_CHAR); + } + + for (i = 1; i < 8; ++i) + { + do_test (i, 64, 256, 0, SMALL_CHAR); + do_test (i, 64, 256, 0, BIG_CHAR); + } + + for (i = 0; i < 32; ++i) + { + do_test (0, i, i + 1, 0, SMALL_CHAR); + do_test (0, i, i + 1, 0, BIG_CHAR); + } + + return ret; +} + +#include "../test-skeleton.c" |