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/* Measure STRCHR functions.
Copyright (C) 2013-2024 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
<https://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifdef WIDE
# define TEST_NAME "wcsrchr"
#else
# define TEST_NAME "strrchr"
#endif
#include "bench-string.h"
#include "json-lib.h"
#define BIG_CHAR MAX_CHAR
#ifdef WIDE
# define SMALL_CHAR 1273
#else
# define SMALL_CHAR 127
char *
generic_strrchr (const char *, int);
IMPL (generic_strrchr, 0)
#endif
typedef CHAR *(*proto_t) (const CHAR *, int);
IMPL (STRRCHR, 1)
static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const CHAR *s, int c,
CHAR *exp_res)
{
CHAR *res = CALL (impl, s, c);
size_t i, iters = INNER_LOOP_ITERS8;
timing_t start, stop, cur;
if (res != exp_res)
{
error (0, 0, "Wrong result in function %s %p %p", impl->name, res,
exp_res);
ret = 1;
return;
}
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, s, c);
}
TIMING_NOW (stop);
TIMING_DIFF (cur, start, stop);
json_element_double (json_ctx, (double) cur / (double) iters);
}
static void
do_test (json_ctx_t *json_ctx, size_t align, size_t pos, size_t len,
int seek_char, int max_char, size_t freq)
/* For wcsrchr: align here means align 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. */
{
size_t i;
size_t pos_chunk_sz = freq ? (pos / freq) : pos;
size_t last_pos = len;
CHAR *result;
CHAR *buf = (CHAR *) buf1;
align &= (getpagesize () - 1);
if ((align + len) * sizeof (CHAR) >= page_size)
return;
for (i = 0; i < len; ++i)
{
buf[align + i] = (random () * random ()) & max_char;
if (!buf[align + i])
buf[align + i] = (random () * random ()) & max_char;
if (!buf[align + i])
buf[align + i] = 1;
if ((i > pos || pos >= len) && buf[align + i] == seek_char)
buf[align + i] = seek_char + 10 + (random () & 15);
}
if (pos_chunk_sz == 0 && pos)
pos_chunk_sz = 1;
for (i = pos_chunk_sz; i < pos && i < len; i += pos_chunk_sz)
{
buf[align + i] = seek_char;
last_pos = i;
}
buf[align + len] = 0;
if (pos < len)
{
buf[align + pos] = seek_char;
result = (CHAR *) (buf + align + pos);
}
else if (last_pos < len)
result = (CHAR *) (buf + align + last_pos);
else if (seek_char == 0)
result = (CHAR *) (buf + align + len);
else
result = NULL;
json_element_object_begin (json_ctx);
json_attr_uint (json_ctx, "len", len);
json_attr_uint (json_ctx, "pos", pos);
json_attr_uint (json_ctx, "align", align);
json_attr_uint (json_ctx, "freq", freq);
json_attr_uint (json_ctx, "seek", seek_char);
json_attr_uint (json_ctx, "max_char", max_char);
json_array_begin (json_ctx, "timings");
FOR_EACH_IMPL (impl, 0)
do_one_test (json_ctx, impl, (CHAR *) (buf + align), seek_char, result);
json_array_end (json_ctx);
json_element_object_end (json_ctx);
}
int
test_main (void)
{
json_ctx_t json_ctx;
size_t i, j, k;
int seek;
test_init ();
json_init (&json_ctx, 0, stdout);
json_document_begin (&json_ctx);
json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
json_attr_object_begin (&json_ctx, "functions");
json_attr_object_begin (&json_ctx, TEST_NAME);
json_attr_string (&json_ctx, "bench-variant", "");
json_array_begin (&json_ctx, "ifuncs");
FOR_EACH_IMPL (impl, 0)
json_element_string (&json_ctx, impl->name);
json_array_end (&json_ctx);
json_array_begin (&json_ctx, "results");
for (seek = 0; seek <= 23; seek += 23)
{
for (j = 1; j <= 256; j = (j * 4))
{
for (i = 1; i < 9; ++i)
{
do_test (&json_ctx, 0, 16 << i, 2048, seek, SMALL_CHAR, j);
do_test (&json_ctx, i, 16 << i, 2048, seek, SMALL_CHAR, j);
}
for (i = 1; i < 8; ++i)
{
do_test (&json_ctx, i, 64, 256, seek, SMALL_CHAR, j);
do_test (&json_ctx, i, 64, 256, seek, BIG_CHAR, j);
do_test (&json_ctx, i * 15, 64, 256, seek, SMALL_CHAR, j);
do_test (&json_ctx, i * 15, 64, 256, seek, BIG_CHAR, j);
}
for (i = 0; i < 32; ++i)
{
do_test (&json_ctx, 0, i, i + 1, seek, SMALL_CHAR, j);
do_test (&json_ctx, 0, i, i + 1, seek, BIG_CHAR, j);
do_test (&json_ctx, getpagesize () - i / 2 - 1, i, i + 1, seek,
SMALL_CHAR, j);
}
for (i = (16 / sizeof (CHAR)); i <= (288 / sizeof (CHAR)); i += 32)
{
do_test (&json_ctx, 0, i - 16, i, seek, SMALL_CHAR, j);
do_test (&json_ctx, 0, i, i + 16, seek, SMALL_CHAR, j);
}
for (i = (16 / sizeof (CHAR)); i <= (2048 / sizeof (CHAR)); i += i)
{
for (k = 0; k <= (288 / sizeof (CHAR));
k += (48 / sizeof (CHAR)))
{
do_test (&json_ctx, 0, k, i, seek, SMALL_CHAR, j);
do_test (&json_ctx, 0, i, i + k, seek, SMALL_CHAR, j);
if (k < i)
{
do_test (&json_ctx, 0, i - k, i, seek, SMALL_CHAR, j);
do_test (&json_ctx, 0, k, i - k, seek, SMALL_CHAR, j);
do_test (&json_ctx, 0, i, i - k, seek, SMALL_CHAR, j);
}
}
}
if (seek == 0)
{
break;
}
}
}
json_array_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_attr_object_end (&json_ctx);
json_document_end (&json_ctx);
return ret;
}
#include <support/test-driver.c>
#define weak_alias(X,Y)
#define libc_hidden_builtin_def(X)
#ifndef WIDE
# undef STRRCHR
# define STRRCHR generic_strrchr
# define __memrchr memrchr
# include <string/strrchr.c>
#endif
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