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/* Measure memset functions.
Copyright (C) 2013-2019 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
<http://www.gnu.org/licenses/>. */
#define TEST_MAIN
#ifndef WIDE
# define TEST_NAME "memset"
#else
# define TEST_NAME "wmemset"
#endif /* WIDE */
#define MIN_PAGE_SIZE 131072
#include "bench-string.h"
#include "json-lib.h"
CHAR *SIMPLE_MEMSET (CHAR *, int, size_t);
typedef CHAR *(*proto_t) (CHAR *, int, size_t);
IMPL (MEMSET, 1)
IMPL (SIMPLE_MEMSET, 0)
CHAR *
inhibit_loop_to_libcall
SIMPLE_MEMSET (CHAR *s, int c, size_t n)
{
CHAR *r = s, *end = s + n;
while (r < end)
*r++ = c;
return s;
}
static void
do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s,
int c __attribute ((unused)), size_t n)
{
size_t i, iters = INNER_LOOP_ITERS;
timing_t start, stop, cur;
TIMING_NOW (start);
for (i = 0; i < iters; ++i)
{
CALL (impl, s, c, n);
}
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, int c, size_t len)
{
align &= 63;
if ((align + len) * sizeof (CHAR) > page_size)
return;
json_element_object_begin (json_ctx);
json_attr_uint (json_ctx, "length", len);
json_attr_uint (json_ctx, "alignment", align);
json_attr_int (json_ctx, "char", c);
json_array_begin (json_ctx, "timings");
FOR_EACH_IMPL (impl, 0)
{
do_one_test (json_ctx, impl, (CHAR *) (buf1) + align, c, len);
alloc_bufs ();
}
json_array_end (json_ctx);
json_element_object_end (json_ctx);
}
int
test_main (void)
{
json_ctx_t json_ctx;
size_t i;
int c = 0;
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 (c = -65; c <= 130; c += 65)
{
for (i = 0; i < 18; ++i)
do_test (&json_ctx, 0, c, 1 << i);
for (i = 1; i < 32; ++i)
{
do_test (&json_ctx, i, c, i);
if (i & (i - 1))
do_test (&json_ctx, 0, c, i);
}
for (i = 32; i < 512; i+=32)
{
do_test (&json_ctx, 0, c, i);
do_test (&json_ctx, i, c, i);
}
do_test (&json_ctx, 1, c, 14);
do_test (&json_ctx, 3, c, 1024);
do_test (&json_ctx, 4, c, 64);
do_test (&json_ctx, 2, c, 25);
}
for (i = 33; i <= 256; i += 4)
{
do_test (&json_ctx, 0, c, 32 * i);
do_test (&json_ctx, i, c, 32 * i);
}
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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