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/* Measure memchr 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/>. */
#include <assert.h>
#include <stdint.h>
#define TEST_MAIN
#define TEST_NAME "rawmemchr"
#include "bench-string.h"
#include "json-lib.h"
typedef char *(*proto_t) (const char *, int);
char *
generic_rawmemchr (const char *s, int c)
{
if ((unsigned char) c != 0)
return memchr (s, c, PTRDIFF_MAX);
return (char *)s + strlen (s);
}
IMPL (rawmemchr, 1)
IMPL (generic_rawmemchr, 0)
static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, const char *s, int c, char *exp_res)
{
size_t i, iters = INNER_LOOP_ITERS_LARGE * 4;
timing_t start, stop, cur;
char *res = CALL (impl, s, c);
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)
{
size_t i;
char *result;
align &= getpagesize () - 1;
if (align + len >= page_size)
return;
for (i = 0; i < len; ++i)
{
buf1[align + i] = 1 + 23 * i % 127;
if (buf1[align + i] == seek_char)
buf1[align + i] = seek_char + 1;
}
buf1[align + len] = 0;
assert (pos < len);
buf1[align + pos] = seek_char;
buf1[align + len] = -seek_char;
result = (char *) (buf1 + align + pos);
json_element_object_begin (json_ctx);
json_attr_uint (json_ctx, "length", pos);
json_attr_uint (json_ctx, "alignment", align);
json_attr_uint (json_ctx, "char", seek_char);
json_array_begin (json_ctx, "timings");
FOR_EACH_IMPL (impl, 0)
do_one_test (json_ctx, impl, (char *) (buf1 + 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;
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 (i = 1; i < 7; ++i)
{
do_test (&json_ctx, 0, 16 << i, 2048, 23);
do_test (&json_ctx, i, 64, 256, 23);
do_test (&json_ctx, 0, 16 << i, 2048, 0);
do_test (&json_ctx, i, 64, 256, 0);
}
for (i = 1; i < 32; ++i)
{
do_test (&json_ctx, 0, i, i + 1, 23);
do_test (&json_ctx, 0, i, i + 1, 0);
}
for (; i < 256; i += 32)
{
do_test (&json_ctx, 0, i, i + 1, 23);
do_test (&json_ctx, 0, i - 1, i, 23);
}
for (; i < 512; i += 64)
{
do_test (&json_ctx, 0, i, i + 1, 23);
do_test (&json_ctx, 0, i - 1, i, 23);
}
for (; i < 1024; i += 128)
{
do_test (&json_ctx, 0, i, i + 1, 23);
do_test (&json_ctx, 0, i - 1, i, 23);
}
for (; i < 2048; i += 256)
{
do_test (&json_ctx, 0, i, i + 1, 23);
do_test (&json_ctx, 0, i - 1, i, 23);
}
for (; i < 4096; i += 512)
{
do_test (&json_ctx, 0, i, i + 1, 23);
do_test (&json_ctx, 0, i - 1, i, 23);
}
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>
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