| /* Measure memchr functions. |
| Copyright (C) 2013-2018 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/>. */ |
| |
| #ifndef WIDE |
| # define CHAR char |
| # define SMALL_CHAR 127 |
| #else |
| # include <wchar.h> |
| # define CHAR wchar_t |
| # define SMALL_CHAR 1273 |
| #endif /* WIDE */ |
| |
| #ifndef USE_AS_MEMRCHR |
| # define TEST_MAIN |
| # ifndef WIDE |
| # define TEST_NAME "memchr" |
| # else |
| # define TEST_NAME "wmemchr" |
| # endif /* WIDE */ |
| # include "bench-string.h" |
| |
| # ifndef WIDE |
| # define MEMCHR memchr |
| # define SIMPLE_MEMCHR simple_memchr |
| # else |
| # define MEMCHR wmemchr |
| # define SIMPLE_MEMCHR simple_wmemchr |
| # endif /* WIDE */ |
| |
| typedef CHAR *(*proto_t) (const CHAR *, int, size_t); |
| CHAR *SIMPLE_MEMCHR (const CHAR *, int, size_t); |
| |
| IMPL (SIMPLE_MEMCHR, 0) |
| IMPL (MEMCHR, 1) |
| |
| CHAR * |
| SIMPLE_MEMCHR (const CHAR *s, int c, size_t n) |
| { |
| while (n--) |
| if (*s++ == (CHAR) c) |
| return (CHAR *) s - 1; |
| return NULL; |
| } |
| #endif /* !USE_AS_MEMRCHR */ |
| |
| static void |
| do_one_test (impl_t *impl, const CHAR *s, int c, size_t n) |
| { |
| size_t i, iters = INNER_LOOP_ITERS; |
| timing_t start, stop, cur; |
| |
| TIMING_NOW (start); |
| for (i = 0; i < iters; ++i) |
| { |
| CALL (impl, s, c, n); |
| } |
| 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; |
| |
| align &= 7; |
| if ((align + len) * sizeof (CHAR) >= page_size) |
| return; |
| |
| CHAR *buf = (CHAR *) (buf1); |
| |
| for (i = 0; i < len; ++i) |
| { |
| buf[align + i] = 1 + 23 * i % SMALL_CHAR; |
| if (buf[align + i] == seek_char) |
| buf[align + i] = seek_char + 1; |
| } |
| buf[align + len] = 0; |
| |
| if (pos < len) |
| { |
| buf[align + pos] = seek_char; |
| buf[align + len] = -seek_char; |
| } |
| else |
| { |
| buf[align + len] = seek_char; |
| } |
| |
| printf ("Length %4zd, position %4zd, alignment %2zd:", |
| len, pos, align); |
| |
| FOR_EACH_IMPL (impl, 0) |
| do_one_test (impl, (CHAR *) (buf + align), seek_char, len); |
| |
| 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); |
| do_test (i, 64, 256, 23); |
| do_test (0, 16 << i, 2048, 0); |
| do_test (i, 64, 256, 0); |
| #ifdef USE_AS_MEMRCHR |
| /* Also test the position close to the beginning for memrchr. */ |
| do_test (0, i, 256, 23); |
| do_test (0, i, 256, 0); |
| do_test (i, i, 256, 23); |
| do_test (i, i, 256, 0); |
| #endif |
| } |
| for (i = 1; i < 32; ++i) |
| { |
| do_test (0, i, i + 1, 23); |
| do_test (0, i, i + 1, 0); |
| do_test (i, i, i + 1, 23); |
| do_test (i, i, i + 1, 0); |
| #ifdef USE_AS_MEMRCHR |
| /* Also test the position close to the beginning for memrchr. */ |
| do_test (0, 1, i + 1, 23); |
| do_test (0, 2, i + 1, 0); |
| #endif |
| } |
| |
| return ret; |
| } |
| |
| #include <support/test-driver.c> |