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Diffstat (limited to 'benchtests/bench-strcmp.c')
| -rw-r--r-- | benchtests/bench-strcmp.c | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/benchtests/bench-strcmp.c b/benchtests/bench-strcmp.c deleted file mode 100644 index 1fd0d1e191..0000000000 --- a/benchtests/bench-strcmp.c +++ /dev/null @@ -1,241 +0,0 @@ -/* Measure strcmp and wcscmp functions. - Copyright (C) 2013-2017 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 "wcscmp" -#else -# define TEST_NAME "strcmp" -#endif -#include "bench-string.h" - -#ifdef WIDE -# include <wchar.h> - -# define L(str) L##str -# define STRCMP wcscmp -# define STRCPY wcscpy -# define STRLEN wcslen -# define MEMCPY wmemcpy -# define SIMPLE_STRCMP simple_wcscmp -# define STUPID_STRCMP stupid_wcscmp -# define CHAR wchar_t -# define UCHAR wchar_t -# define CHARBYTES 4 -# define CHARBYTESLOG 2 -# define CHARALIGN __alignof__ (CHAR) -# define MIDCHAR 0x7fffffff -# define LARGECHAR 0xfffffffe -# define CHAR__MAX WCHAR_MAX -# define CHAR__MIN WCHAR_MIN - -/* Wcscmp uses signed semantics for comparison, not unsigned */ -/* Avoid using substraction since possible overflow */ - -int -simple_wcscmp (const wchar_t *s1, const wchar_t *s2) -{ - wchar_t c1, c2; - do - { - c1 = *s1++; - c2 = *s2++; - if (c2 == L'\0') - return c1 - c2; - } - while (c1 == c2); - - return c1 < c2 ? -1 : 1; -} - -int -stupid_wcscmp (const wchar_t *s1, const wchar_t *s2) -{ - size_t ns1 = wcslen (s1) + 1; - size_t ns2 = wcslen (s2) + 1; - size_t n = ns1 < ns2 ? ns1 : ns2; - int ret = 0; - - wchar_t c1, c2; - - while (n--) { - c1 = *s1++; - c2 = *s2++; - if ((ret = c1 < c2 ? -1 : c1 == c2 ? 0 : 1) != 0) - break; - } - return ret; -} - -#else -# include <limits.h> - -# define L(str) str -# define STRCMP strcmp -# define STRCPY strcpy -# define STRLEN strlen -# define MEMCPY memcpy -# define SIMPLE_STRCMP simple_strcmp -# define STUPID_STRCMP stupid_strcmp -# define CHAR char -# define UCHAR unsigned char -# define CHARBYTES 1 -# define CHARBYTESLOG 0 -# define CHARALIGN 1 -# define MIDCHAR 0x7f -# define LARGECHAR 0xfe -# define CHAR__MAX CHAR_MAX -# define CHAR__MIN CHAR_MIN - -/* Strcmp uses unsigned semantics for comparison. */ -int -simple_strcmp (const char *s1, const char *s2) -{ - int ret; - - while ((ret = *(unsigned char *) s1 - *(unsigned char*) s2++) == 0 && *s1++); - return ret; -} - -int -stupid_strcmp (const char *s1, const char *s2) -{ - size_t ns1 = strlen (s1) + 1; - size_t ns2 = strlen (s2) + 1; - size_t n = ns1 < ns2 ? ns1 : ns2; - int ret = 0; - - while (n--) - if ((ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) != 0) - break; - return ret; -} -#endif - -typedef int (*proto_t) (const CHAR *, const CHAR *); - -IMPL (STUPID_STRCMP, 1) -IMPL (SIMPLE_STRCMP, 1) -IMPL (STRCMP, 1) - -static void -do_one_test (impl_t *impl, - const CHAR *s1, const CHAR *s2, - int exp_result) -{ - size_t i, iters = INNER_LOOP_ITERS; - timing_t start, stop, cur; - - TIMING_NOW (start); - for (i = 0; i < iters; ++i) - { - CALL (impl, s1, s2); - } - TIMING_NOW (stop); - - TIMING_DIFF (cur, start, stop); - - TIMING_PRINT_MEAN ((double) cur, (double) iters); -} - -static void -do_test (size_t align1, size_t align2, size_t len, int max_char, - int exp_result) -{ - size_t i; - - CHAR *s1, *s2; - - if (len == 0) - return; - - align1 &= 63; - if (align1 + (len + 1) * CHARBYTES >= page_size) - return; - - align2 &= 63; - if (align2 + (len + 1) * CHARBYTES >= page_size) - return; - - /* Put them close to the end of page. */ - i = align1 + CHARBYTES * (len + 2); - s1 = (CHAR *) (buf1 + ((page_size - i) / 16 * 16) + align1); - i = align2 + CHARBYTES * (len + 2); - s2 = (CHAR *) (buf2 + ((page_size - i) / 16 * 16) + align2); - - for (i = 0; i < len; i++) - s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char; - - s1[len] = s2[len] = 0; - s1[len + 1] = 23; - s2[len + 1] = 24 + exp_result; - s2[len - 1] -= exp_result; - - printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); - - FOR_EACH_IMPL (impl, 0) - do_one_test (impl, s1, s2, exp_result); - - putchar ('\n'); -} - -int -test_main (void) -{ - size_t i; - - test_init (); - - printf ("%23s", ""); - FOR_EACH_IMPL (impl, 0) - printf ("\t%s", impl->name); - putchar ('\n'); - - for (i = 1; i < 32; ++i) - { - do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0); - do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1); - do_test (CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1); - } - - for (i = 1; i < 10 + CHARBYTESLOG; ++i) - { - do_test (0, 0, 2 << i, MIDCHAR, 0); - do_test (0, 0, 2 << i, LARGECHAR, 0); - do_test (0, 0, 2 << i, MIDCHAR, 1); - do_test (0, 0, 2 << i, LARGECHAR, 1); - do_test (0, 0, 2 << i, MIDCHAR, -1); - do_test (0, 0, 2 << i, LARGECHAR, -1); - do_test (0, CHARBYTES * i, 2 << i, MIDCHAR, 1); - do_test (CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, LARGECHAR, 1); - } - - for (i = 1; i < 8; ++i) - { - do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 0); - do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 0); - do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 1); - do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 1); - do_test (CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, -1); - do_test (2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, -1); - } - - return ret; -} - -#include <support/test-driver.c> |