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16f87cfd63
Continue cleanup of the string benchtests. Remove simplistic byte-oriented versions with faster generic implementations. Remove bcopy/bzero benchmarks (bcopy/bzero are obsolete and never emitted by compilers). Remove builtin versions of memcpy, memset and strlen. Remove all remaining "stupid" implementations given they are always slower than the "simple" variants and thus don't add anything useful. * benchtests/bench-strcasecmp.c (stupid_strcasecmp): Remove. * benchtests/bench-strcasestr.c (stupid_strcasestr): Remove. * benchtests/bench-strchr.c (stupid_strchr): Remove. * benchtests/bench-strcmp.c (stupid_strcmp): Remove. * benchtests/bench-strcspn.c (stupid_strcspn): Remove. * benchtests/bench-strlen.c (builtin_strlen): Remove. * benchtests/bench-strncasecmp.c (stupid_strncasecmp): Remove. * benchtests/bench-strncmp.c (stupid_strncmp): Remove. * benchtests/bench-strpbrk.c (stupid_strpbrk): Remove. * benchtests/bench-strspn.c (stupid_strspn): Remove. * benchtests/Makefile: Remove bench-bcopy.c and bench-bzero.c. * benchtests/bench-bcopy.c: Delete file. * benchtests/bench-bzero.c: Likewise. * benchtests/bench-memccpy.c (stupid_memccpy): Remove. (simple_memccpy): Remove. (generic_memccpy): Add function. * benchtests/bench-memcpy.c: (builtin_memcpy): Remove. * benchtests/bench-memmove.c (simple_bcopy): Remove. * benchtests/bench-mempcpy.c (simple_mempcpy): Remove. (generic_mempcpy): Add new function. * benchtests/bench-memset.c (simple_bzero): Remove. (builtin_bzero): Remove. (builtin_memset): Remove. * benchtests/bench-rawmemchr.c (simple_rawmemchr): Remove. (generic_rawmemchr): Add new function.
126 lines
2.8 KiB
C
126 lines
2.8 KiB
C
/* Measure memchr functions.
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Copyright (C) 2013-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <assert.h>
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#include <stdint.h>
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#define TEST_MAIN
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#define TEST_NAME "rawmemchr"
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#include "bench-string.h"
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typedef char *(*proto_t) (const char *, int);
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char *
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generic_rawmemchr (const char *s, int c)
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{
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if (c != 0)
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return memchr (s, c, PTRDIFF_MAX);
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return (char *)s + strlen (s);
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}
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IMPL (rawmemchr, 1)
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IMPL (generic_rawmemchr, 0)
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static void
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do_one_test (impl_t *impl, const char *s, int c, char *exp_res)
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{
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size_t i, iters = INNER_LOOP_ITERS;
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timing_t start, stop, cur;
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char *res = CALL (impl, s, c);
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if (res != exp_res)
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{
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error (0, 0, "Wrong result in function %s %p %p", impl->name,
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res, exp_res);
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ret = 1;
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return;
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}
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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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{
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CALL (impl, s, c);
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}
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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TIMING_PRINT_MEAN ((double) cur, (double) iters);
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}
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static void
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do_test (size_t align, size_t pos, size_t len, int seek_char)
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{
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size_t i;
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char *result;
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align &= 7;
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if (align + len >= page_size)
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return;
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for (i = 0; i < len; ++i)
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{
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buf1[align + i] = 1 + 23 * i % 127;
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if (buf1[align + i] == seek_char)
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buf1[align + i] = seek_char + 1;
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}
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buf1[align + len] = 0;
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assert (pos < len);
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buf1[align + pos] = seek_char;
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buf1[align + len] = -seek_char;
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result = (char *) (buf1 + align + pos);
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printf ("Length %4zd, alignment %2zd:", pos, align);
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FOR_EACH_IMPL (impl, 0)
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do_one_test (impl, (char *) (buf1 + align), seek_char, result);
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putchar ('\n');
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}
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int
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test_main (void)
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{
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size_t i;
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test_init ();
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printf ("%20s", "");
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FOR_EACH_IMPL (impl, 0)
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printf ("\t%s", impl->name);
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putchar ('\n');
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for (i = 1; i < 7; ++i)
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{
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do_test (0, 16 << i, 2048, 23);
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do_test (i, 64, 256, 23);
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do_test (0, 16 << i, 2048, 0);
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do_test (i, 64, 256, 0);
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}
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for (i = 1; i < 32; ++i)
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{
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do_test (0, i, i + 1, 23);
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do_test (0, i, i + 1, 0);
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}
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return ret;
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}
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#include <support/test-driver.c>
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