diff options
Diffstat (limited to 'REORG.TODO/benchtests/bench-memset.c')
| -rw-r--r-- | REORG.TODO/benchtests/bench-memset.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/REORG.TODO/benchtests/bench-memset.c b/REORG.TODO/benchtests/bench-memset.c new file mode 100644 index 0000000000..dc7944c596 --- /dev/null +++ b/REORG.TODO/benchtests/bench-memset.c @@ -0,0 +1,193 @@ +/* Measure memset 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 TEST_BZERO +# define TEST_NAME "bzero" +#else +# ifndef WIDE +# define TEST_NAME "memset" +# else +# define TEST_NAME "wmemset" +# endif /* WIDE */ +#endif /* !TEST_BZERO */ +#define MIN_PAGE_SIZE 131072 +#include "bench-string.h" + +#ifndef WIDE +# define MEMSET memset +# define CHAR char +# define SIMPLE_MEMSET simple_memset +# define MEMCMP memcmp +#else +# include <wchar.h> +# define MEMSET wmemset +# define CHAR wchar_t +# define SIMPLE_MEMSET simple_wmemset +# define MEMCMP wmemcmp +#endif /* WIDE */ + +CHAR *SIMPLE_MEMSET (CHAR *, int, size_t); + +#ifdef TEST_BZERO +typedef void (*proto_t) (char *, size_t); +void simple_bzero (char *, size_t); +void builtin_bzero (char *, size_t); + +IMPL (simple_bzero, 0) +IMPL (builtin_bzero, 0) +IMPL (bzero, 1) + +void +simple_bzero (char *s, size_t n) +{ + SIMPLE_MEMSET (s, 0, n); +} + +void +builtin_bzero (char *s, size_t n) +{ + __builtin_bzero (s, n); +} +#else +typedef CHAR *(*proto_t) (CHAR *, int, size_t); + +IMPL (SIMPLE_MEMSET, 0) +# ifndef WIDE +char *builtin_memset (char *, int, size_t); +IMPL (builtin_memset, 0) +# endif /* !WIDE */ +IMPL (MEMSET, 1) + +# ifndef WIDE +char * +builtin_memset (char *s, int c, size_t n) +{ + return __builtin_memset (s, c, n); +} +# endif /* !WIDE */ +#endif /* !TEST_BZERO */ + +CHAR * +inhibit_loop_to_libcall +SIMPLE_MEMSET (CHAR *s, int c, size_t n) +{ + CHAR *r = s, *end = s + n; + while (r < end) + *r++ = c; + return s; +} + +static void +do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n) +{ + size_t i, iters = INNER_LOOP_ITERS; + timing_t start, stop, cur; + CHAR tstbuf[n]; +#ifdef TEST_BZERO + simple_bzero (tstbuf, n); + CALL (impl, s, n); + if (memcmp (s, tstbuf, n) != 0) +#else + CHAR *res = CALL (impl, s, c, n); + if (res != s + || SIMPLE_MEMSET (tstbuf, c, n) != tstbuf + || MEMCMP (s, tstbuf, n) != 0) +#endif /* !TEST_BZERO */ + { + error (0, 0, "Wrong result in function %s", impl->name); + ret = 1; + return; + } + + TIMING_NOW (start); + for (i = 0; i < iters; ++i) + { +#ifdef TEST_BZERO + CALL (impl, s, n); +#else + CALL (impl, s, c, n); +#endif /* !TEST_BZERO */ + } + TIMING_NOW (stop); + + TIMING_DIFF (cur, start, stop); + + TIMING_PRINT_MEAN ((double) cur, (double) iters); +} + +static void +do_test (size_t align, int c, size_t len) +{ + align &= 63; + if ((align + len) * sizeof (CHAR) > page_size) + return; + + printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c); + + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, (CHAR *) (buf1) + align, c, len); + + putchar ('\n'); +} + +int +test_main (void) +{ + size_t i; + int c = 0; + + test_init (); + + printf ("%24s", ""); + FOR_EACH_IMPL (impl, 0) + printf ("\t%s", impl->name); + putchar ('\n'); + +#ifndef TEST_BZERO + for (c = -65; c <= 130; c += 65) +#endif + { + for (i = 0; i < 18; ++i) + do_test (0, c, 1 << i); + for (i = 1; i < 32; ++i) + { + do_test (i, c, i); + if (i & (i - 1)) + do_test (0, c, i); + } + for (i = 32; i < 512; i+=32) + { + do_test (0, c, i); + do_test (i, c, i); + } + do_test (1, c, 14); + do_test (3, c, 1024); + do_test (4, c, 64); + do_test (2, c, 25); + } + for (i = 33; i <= 256; i += 4) + { + do_test (0, c, 32 * i); + do_test (i, c, 32 * i); + } + + return ret; +} + +#include <support/test-driver.c> |