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Diffstat (limited to 'benchtests/bench-memcpy.c')
| -rw-r--r-- | benchtests/bench-memcpy.c | 169 |
1 files changed, 0 insertions, 169 deletions
diff --git a/benchtests/bench-memcpy.c b/benchtests/bench-memcpy.c deleted file mode 100644 index 6d0b9fbd47..0000000000 --- a/benchtests/bench-memcpy.c +++ /dev/null @@ -1,169 +0,0 @@ -/* Measure memcpy 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/>. */ - -#ifndef MEMCPY_RESULT -# define MEMCPY_RESULT(dst, len) dst -# define MIN_PAGE_SIZE 131072 -# define TEST_MAIN -# define TEST_NAME "memcpy" -# include "bench-string.h" - -char *simple_memcpy (char *, const char *, size_t); -char *builtin_memcpy (char *, const char *, size_t); - -IMPL (simple_memcpy, 0) -IMPL (builtin_memcpy, 0) -IMPL (memcpy, 1) - -char * -simple_memcpy (char *dst, const char *src, size_t n) -{ - char *ret = dst; - while (n--) - *dst++ = *src++; - return ret; -} - -char * -builtin_memcpy (char *dst, const char *src, size_t n) -{ - return __builtin_memcpy (dst, src, n); -} -#endif - -typedef char *(*proto_t) (char *, const char *, size_t); - -static void -do_one_test (impl_t *impl, char *dst, const char *src, - size_t len) -{ - size_t i, iters = INNER_LOOP_ITERS; - timing_t start, stop, cur; - - /* Must clear the destination buffer set by the previous run. */ - for (i = 0; i < len; i++) - dst[i] = 0; - - if (CALL (impl, dst, src, len) != MEMCPY_RESULT (dst, len)) - { - error (0, 0, "Wrong result in function %s %p %p", impl->name, - CALL (impl, dst, src, len), MEMCPY_RESULT (dst, len)); - ret = 1; - return; - } - - if (memcmp (dst, src, len) != 0) - { - error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"", - impl->name, dst, src); - ret = 1; - return; - } - - TIMING_NOW (start); - for (i = 0; i < iters; ++i) - { - CALL (impl, dst, src, len); - } - 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) -{ - size_t i, j; - char *s1, *s2; - - align1 &= 63; - if (align1 + len >= page_size) - return; - - align2 &= 63; - if (align2 + len >= page_size) - return; - - s1 = (char *) (buf1 + align1); - s2 = (char *) (buf2 + align2); - - for (i = 0, j = 1; i < len; i++, j += 23) - s1[i] = j; - - printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); - - FOR_EACH_IMPL (impl, 0) - do_one_test (impl, s2, s1, len); - - 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 = 0; i < 18; ++i) - { - do_test (0, 0, 1 << i); - do_test (i, 0, 1 << i); - do_test (0, i, 1 << i); - do_test (i, i, 1 << i); - } - - for (i = 0; i < 32; ++i) - { - do_test (0, 0, i); - do_test (i, 0, i); - do_test (0, i, i); - do_test (i, i, i); - } - - for (i = 3; i < 32; ++i) - { - if ((i & (i - 1)) == 0) - continue; - do_test (0, 0, 16 * i); - do_test (i, 0, 16 * i); - do_test (0, i, 16 * i); - do_test (i, i, 16 * i); - } - - for (i = 32; i < 64; ++i) - { - do_test (0, 0, 32 * i); - do_test (i, 0, 32 * i); - do_test (0, i, 32 * i); - do_test (i, i, 32 * i); - } - - do_test (0, 0, getpagesize ()); - - return ret; -} - -#include <support/test-driver.c> |