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Diffstat (limited to 'string/test-memset.c')
| -rw-r--r-- | string/test-memset.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/string/test-memset.c b/string/test-memset.c new file mode 100644 index 0000000000..2847502f10 --- /dev/null +++ b/string/test-memset.c @@ -0,0 +1,212 @@ +/* Test and measure memset functions. + Copyright (C) 1999, 2002 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Written by Jakub Jelinek <jakub@redhat.com>, 1999. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#define TEST_MAIN +#define MIN_PAGE_SIZE 131072 +#include "test-string.h" + +typedef char *(*proto_t) (char *, int, size_t); +char *simple_memset (char *, int, size_t); +char *builtin_memset (char *, int, size_t); + +IMPL (simple_memset, 0) +IMPL (builtin_memset, 0) +IMPL (memset, 1) + +char * +simple_memset (char *s, int c, size_t n) +{ + char *r = s, *end = s + n; + while (r < end) + *r++ = c; + return s; +} + +char * +builtin_memset (char *s, int c, size_t n) +{ + return __builtin_memset (s, c, n); +} + +static void +do_one_test (impl_t *impl, char *s, int c, size_t n) +{ + char *res = CALL (impl, s, c, n); + if (res != s) + { + error (0, 0, "Wrong result in function %s %p != %p", impl->name, + res, s); + ret = 1; + return; + } + + if (HP_TIMING_AVAIL) + { + hp_timing_t start, stop, best_time = ~ (hp_timing_t) 0; + size_t i; + + for (i = 0; i < 32; ++i) + { + HP_TIMING_NOW (start); + CALL (impl, s, c, n); + HP_TIMING_NOW (stop); + HP_TIMING_BEST (best_time, start, stop); + } + + printf ("\t%zd", (size_t) best_time); + } +} + +static void +do_test (size_t align, int c, size_t len) +{ + align &= 7; + if (align + len > page_size) + return; + + if (HP_TIMING_AVAIL) + printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c); + + FOR_EACH_IMPL (impl, 0) + do_one_test (impl, buf1 + align, c, len); + + if (HP_TIMING_AVAIL) + putchar ('\n'); +} + +static void +do_random_tests (void) +{ + size_t i, j, k, n, align, len, size; + int c, o; + unsigned char *p, *res; + + for (i = 0; i < 65536; ++i) + buf2[i] = random () & 255; + + for (n = 0; n < ITERATIONS; n++) + { + if ((random () & 31) == 0) + size = 65536; + else + size = 512; + p = buf1 + page_size - size; + len = random () & (size - 1); + align = size - len - (random () & 31); + if (align > size) + align = size - len; + if ((random () & 7) == 0) + align &= ~63; + if ((random () & 7) == 0) + c = 0; + else + c = random () & 255; + o = random () & 255; + if (o == c) + o = (c + 1) & 255; + j = len + align + 128; + if (j > size) + j = size; + if (align >= 128) + k = align - 128; + else + k = 0; + for (i = k; i < align; ++i) + p[i] = o; + for (i = align + len; i < j; ++i) + p[i] = o; + + FOR_EACH_IMPL (impl, 1) + { + for (i = 0; i < len; ++i) + { + p[i + align] = buf2[i]; + if (p[i + align] == c) + p[i + align] = o; + } + res = CALL (impl, p + align, c, len); + if (res != p + align) + { + error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %d, %zd) %p != %p", + n, impl->name, align, c, len, res, p + align); + ret = 1; + } + for (i = k; i < align; ++i) + if (p[i] != o) + { + error (0, 0, "Iteration %zd - garbage before %s (%zd, %d, %zd)", + n, impl->name, align, c, len); + ret = 1; + break; + } + for (; i < align + len; ++i) + if (p[i] != c) + { + error (0, 0, "Iteration %zd - not cleared correctly %s (%zd, %d, %zd)", + n, impl->name, align, c, len); + ret = 1; + break; + } + for (; i < j; ++i) + if (p[i] != o) + { + error (0, 0, "Iteration %zd - garbage after %s (%zd, %d, %zd)", + n, impl->name, align, c, len); + ret = 1; + break; + } + } + } +} + +int +test_main (void) +{ + size_t i; + int c; + + test_init (); + + printf ("%24s", ""); + FOR_EACH_IMPL (impl, 0) + printf ("\t%s", impl->name); + putchar ('\n'); + + for (c = 0; c <= 65; c += 65) + { + 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); + } + do_test (1, c, 14); + do_test (3, c, 1024); + do_test (4, c, 64); + do_test (2, c, 25); + } + + do_random_tests (); + return ret; +} + +#include "../test-skeleton.c" |