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Diffstat (limited to 'REORG.TODO/benchtests/bench-strcpy.c')
| -rw-r--r-- | REORG.TODO/benchtests/bench-strcpy.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/REORG.TODO/benchtests/bench-strcpy.c b/REORG.TODO/benchtests/bench-strcpy.c new file mode 100644 index 0000000000..df23616ac2 --- /dev/null +++ b/REORG.TODO/benchtests/bench-strcpy.c @@ -0,0 +1,193 @@ +/* Measure strcpy 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/>. */ + +#ifdef WIDE +# include <wchar.h> +# define CHAR wchar_t +# define UCHAR wchar_t +# define sfmt "ls" +# define BIG_CHAR WCHAR_MAX +# define SMALL_CHAR 1273 +# define STRCMP wcscmp +# define MEMCMP wmemcmp +# define MEMSET wmemset +#else +# define CHAR char +# define UCHAR unsigned char +# define sfmt "s" +# define BIG_CHAR CHAR_MAX +# define SMALL_CHAR 127 +# define STRCMP strcmp +# define MEMCMP memcmp +# define MEMSET memset +#endif + +#ifndef STRCPY_RESULT +# define STRCPY_RESULT(dst, len) dst +# define TEST_MAIN +# ifndef WIDE +# define TEST_NAME "strcpy" +# else +# define TEST_NAME "wcscpy" +# endif +# include "bench-string.h" +# ifndef WIDE +# define SIMPLE_STRCPY simple_strcpy +# define STRCPY strcpy +# else +# define SIMPLE_STRCPY simple_wcscpy +# define STRCPY wcscpy +# endif + +CHAR *SIMPLE_STRCPY (CHAR *, const CHAR *); + +IMPL (SIMPLE_STRCPY, 0) +IMPL (STRCPY, 1) + +CHAR * +SIMPLE_STRCPY (CHAR *dst, const CHAR *src) +{ + CHAR *ret = dst; + while ((*dst++ = *src++) != '\0'); + return ret; +} +#endif + +typedef CHAR *(*proto_t) (CHAR *, const CHAR *); + +static void +do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, + size_t len __attribute__((unused))) +{ + size_t i, iters = INNER_LOOP_ITERS; + timing_t start, stop, cur; + + if (CALL (impl, dst, src) != STRCPY_RESULT (dst, len)) + { + error (0, 0, "Wrong result in function %s %p %p", impl->name, + CALL (impl, dst, src), STRCPY_RESULT (dst, len)); + ret = 1; + return; + } + + if (STRCMP (dst, src) != 0) + { + error (0, 0, + "Wrong result in function %s dst \"%" sfmt "\" src \"%" sfmt "\"", + impl->name, dst, src); + ret = 1; + return; + } + + TIMING_NOW (start); + for (i = 0; i < iters; ++i) + { + CALL (impl, dst, src); + } + 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) +{ + size_t i; + CHAR *s1, *s2; +/* For wcscpy: align1 and align2 here mean alignment 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. */ + align1 &= 7; + if ((align1 + len) * sizeof(CHAR) >= page_size) + return; + + align2 &= 7; + if ((align2 + len) * sizeof(CHAR) >= page_size) + return; + + s1 = (CHAR *) (buf1) + align1; + s2 = (CHAR *) (buf2) + align2; + + for (i = 0; i < len; i++) + s1[i] = 32 + 23 * i % (max_char - 32); + s1[len] = 0; + + printf ("Length %4zd, alignments in bytes %2zd/%2zd:", len, align1 * sizeof(CHAR), align2 * sizeof(CHAR)); + + 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 < 16; ++i) + { + do_test (0, 0, i, SMALL_CHAR); + do_test (0, 0, i, BIG_CHAR); + do_test (0, i, i, SMALL_CHAR); + do_test (i, 0, i, BIG_CHAR); + } + + for (i = 1; i < 8; ++i) + { + do_test (0, 0, 8 << i, SMALL_CHAR); + do_test (8 - i, 2 * i, 8 << i, SMALL_CHAR); + } + + for (i = 1; i < 8; ++i) + { + do_test (i, 2 * i, 8 << i, SMALL_CHAR); + do_test (2 * i, i, 8 << i, BIG_CHAR); + do_test (i, i, 8 << i, SMALL_CHAR); + do_test (i, i, 8 << i, BIG_CHAR); + } + + for (i = 16; i <= 512; i+=4) + { + do_test (0, 4, i, SMALL_CHAR); + do_test (4, 0, i, BIG_CHAR); + do_test (4, 4, i, SMALL_CHAR); + do_test (2, 2, i, BIG_CHAR); + do_test (2, 6, i, SMALL_CHAR); + do_test (6, 2, i, BIG_CHAR); + do_test (1, 7, i, SMALL_CHAR); + do_test (7, 1, i, BIG_CHAR); + do_test (3, 4, i, SMALL_CHAR); + do_test (4, 3, i, BIG_CHAR); + do_test (5, 7, i, SMALL_CHAR); + do_test (7, 5, i, SMALL_CHAR); + } + + return ret; +} + +#include <support/test-driver.c> |