| /* Measure memchr functions. |
| Copyright (C) 2013-2014 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/>. */ |
| |
| #include <assert.h> |
| |
| #define TEST_MAIN |
| #define TEST_NAME "rawmemchr" |
| #include "bench-string.h" |
| |
| typedef char *(*proto_t) (const char *, int); |
| char *simple_rawmemchr (const char *, int); |
| |
| IMPL (simple_rawmemchr, 0) |
| IMPL (rawmemchr, 1) |
| |
| char * |
| simple_rawmemchr (const char *s, int c) |
| { |
| while (1) |
| if (*s++ == (char) c) |
| return (char *) s - 1; |
| return NULL; |
| } |
| |
| static void |
| do_one_test (impl_t *impl, const char *s, int c, char *exp_res) |
| { |
| size_t i, iters = INNER_LOOP_ITERS; |
| timing_t start, stop, cur; |
| 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; |
| } |
| |
| TIMING_NOW (start); |
| for (i = 0; i < iters; ++i) |
| { |
| CALL (impl, s, c); |
| } |
| TIMING_NOW (stop); |
| |
| TIMING_DIFF (cur, start, stop); |
| |
| TIMING_PRINT_MEAN ((double) cur, (double) iters); |
| } |
| |
| static void |
| do_test (size_t align, size_t pos, size_t len, int seek_char) |
| { |
| size_t i; |
| char *result; |
| |
| align &= 7; |
| if (align + len >= page_size) |
| return; |
| |
| for (i = 0; i < len; ++i) |
| { |
| buf1[align + i] = 1 + 23 * i % 127; |
| if (buf1[align + i] == seek_char) |
| buf1[align + i] = seek_char + 1; |
| } |
| buf1[align + len] = 0; |
| |
| assert (pos < len); |
| |
| buf1[align + pos] = seek_char; |
| buf1[align + len] = -seek_char; |
| result = (char *) (buf1 + align + pos); |
| |
| printf ("Length %4zd, alignment %2zd:", pos, align); |
| |
| FOR_EACH_IMPL (impl, 0) |
| do_one_test (impl, (char *) (buf1 + align), seek_char, result); |
| |
| 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 < 7; ++i) |
| { |
| do_test (0, 16 << i, 2048, 23); |
| do_test (i, 64, 256, 23); |
| do_test (0, 16 << i, 2048, 0); |
| do_test (i, 64, 256, 0); |
| } |
| for (i = 1; i < 32; ++i) |
| { |
| do_test (0, i, i + 1, 23); |
| do_test (0, i, i + 1, 0); |
| } |
| |
| return ret; |
| } |
| |
| #include "../test-skeleton.c" |