/* Test and measure memset functions. Copyright (C) 1999, 2002, 2003 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 __attribute ((unused)); hp_timing_t stop __attribute ((unused)); hp_timing_t 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"