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688903eb3e
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
266 lines
6.7 KiB
C
266 lines
6.7 KiB
C
/* Measure strcmp and wcscmp functions.
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Copyright (C) 2013-2018 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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#define TEST_MAIN
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#ifdef WIDE
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# define TEST_NAME "wcscmp"
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#else
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# define TEST_NAME "strcmp"
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#endif
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#include "bench-string.h"
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#ifdef WIDE
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# include <wchar.h>
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# define L(str) L##str
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# define STRCMP wcscmp
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# define STRCPY wcscpy
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# define STRLEN wcslen
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# define MEMCPY wmemcpy
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# define SIMPLE_STRCMP simple_wcscmp
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# define STUPID_STRCMP stupid_wcscmp
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# define CHAR wchar_t
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# define UCHAR wchar_t
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# define CHARBYTES 4
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# define CHARBYTESLOG 2
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# define CHARALIGN __alignof__ (CHAR)
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# define MIDCHAR 0x7fffffff
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# define LARGECHAR 0xfffffffe
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# define CHAR__MAX WCHAR_MAX
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# define CHAR__MIN WCHAR_MIN
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/* Wcscmp uses signed semantics for comparison, not unsigned */
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/* Avoid using substraction since possible overflow */
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int
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simple_wcscmp (const wchar_t *s1, const wchar_t *s2)
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{
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wchar_t c1, c2;
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do
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{
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c1 = *s1++;
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c2 = *s2++;
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if (c2 == L'\0')
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return c1 - c2;
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}
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while (c1 == c2);
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return c1 < c2 ? -1 : 1;
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}
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int
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stupid_wcscmp (const wchar_t *s1, const wchar_t *s2)
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{
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size_t ns1 = wcslen (s1) + 1;
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size_t ns2 = wcslen (s2) + 1;
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size_t n = ns1 < ns2 ? ns1 : ns2;
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int ret = 0;
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wchar_t c1, c2;
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while (n--) {
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c1 = *s1++;
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c2 = *s2++;
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if ((ret = c1 < c2 ? -1 : c1 == c2 ? 0 : 1) != 0)
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break;
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}
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return ret;
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}
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#else
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# include <limits.h>
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# define L(str) str
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# define STRCMP strcmp
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# define STRCPY strcpy
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# define STRLEN strlen
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# define MEMCPY memcpy
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# define SIMPLE_STRCMP simple_strcmp
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# define STUPID_STRCMP stupid_strcmp
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# define CHAR char
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# define UCHAR unsigned char
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# define CHARBYTES 1
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# define CHARBYTESLOG 0
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# define CHARALIGN 1
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# define MIDCHAR 0x7f
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# define LARGECHAR 0xfe
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# define CHAR__MAX CHAR_MAX
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# define CHAR__MIN CHAR_MIN
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/* Strcmp uses unsigned semantics for comparison. */
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int
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simple_strcmp (const char *s1, const char *s2)
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{
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int ret;
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while ((ret = *(unsigned char *) s1 - *(unsigned char*) s2++) == 0 && *s1++);
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return ret;
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}
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int
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stupid_strcmp (const char *s1, const char *s2)
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{
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size_t ns1 = strlen (s1) + 1;
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size_t ns2 = strlen (s2) + 1;
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size_t n = ns1 < ns2 ? ns1 : ns2;
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int ret = 0;
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while (n--)
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if ((ret = *(unsigned char *) s1++ - *(unsigned char *) s2++) != 0)
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break;
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return ret;
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}
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#endif
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# include "json-lib.h"
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typedef int (*proto_t) (const CHAR *, const CHAR *);
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IMPL (STUPID_STRCMP, 1)
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IMPL (SIMPLE_STRCMP, 1)
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IMPL (STRCMP, 1)
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static void
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do_one_test (json_ctx_t *json_ctx, impl_t *impl,
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const CHAR *s1, const CHAR *s2,
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int exp_result)
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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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TIMING_NOW (start);
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for (i = 0; i < iters; ++i)
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{
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CALL (impl, s1, s2);
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}
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TIMING_NOW (stop);
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TIMING_DIFF (cur, start, stop);
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json_element_double (json_ctx, (double) cur / (double) iters);
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}
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static void
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do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len, int
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max_char, int exp_result)
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{
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size_t i;
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CHAR *s1, *s2;
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if (len == 0)
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return;
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align1 &= 63;
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if (align1 + (len + 1) * CHARBYTES >= page_size)
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return;
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align2 &= 63;
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if (align2 + (len + 1) * CHARBYTES >= page_size)
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return;
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/* Put them close to the end of page. */
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i = align1 + CHARBYTES * (len + 2);
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s1 = (CHAR *) (buf1 + ((page_size - i) / 16 * 16) + align1);
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i = align2 + CHARBYTES * (len + 2);
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s2 = (CHAR *) (buf2 + ((page_size - i) / 16 * 16) + align2);
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for (i = 0; i < len; i++)
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s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % max_char;
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s1[len] = s2[len] = 0;
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s1[len + 1] = 23;
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s2[len + 1] = 24 + exp_result;
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s2[len - 1] -= exp_result;
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json_element_object_begin (json_ctx);
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json_attr_uint (json_ctx, "length", (double) len);
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json_attr_uint (json_ctx, "align1", (double) align1);
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json_attr_uint (json_ctx, "align2", (double) align2);
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json_array_begin (json_ctx, "timings");
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FOR_EACH_IMPL (impl, 0)
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do_one_test (json_ctx, impl, s1, s2, exp_result);
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json_array_end (json_ctx);
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json_element_object_end (json_ctx);
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}
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int
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test_main (void)
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{
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json_ctx_t json_ctx;
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size_t i;
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test_init ();
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json_init (&json_ctx, 0, stdout);
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json_document_begin (&json_ctx);
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json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
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json_attr_object_begin (&json_ctx, "functions");
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json_attr_object_begin (&json_ctx, TEST_NAME);
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json_attr_string (&json_ctx, "bench-variant", "default");
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json_array_begin (&json_ctx, "ifuncs");
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FOR_EACH_IMPL (impl, 0)
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json_element_string (&json_ctx, impl->name);
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json_array_end (&json_ctx);
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json_array_begin (&json_ctx, "results");
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for (i = 1; i < 32; ++i)
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{
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do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 0);
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do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, 1);
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do_test (&json_ctx, CHARBYTES * i, CHARBYTES * i, i, MIDCHAR, -1);
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}
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for (i = 1; i < 10 + CHARBYTESLOG; ++i)
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{
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do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 0);
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do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 0);
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do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, 1);
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do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, 1);
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do_test (&json_ctx, 0, 0, 2 << i, MIDCHAR, -1);
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do_test (&json_ctx, 0, 0, 2 << i, LARGECHAR, -1);
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do_test (&json_ctx, 0, CHARBYTES * i, 2 << i, MIDCHAR, 1);
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do_test (&json_ctx, CHARBYTES * i, CHARBYTES * (i + 1), 2 << i, LARGECHAR, 1);
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}
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for (i = 1; i < 8; ++i)
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{
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do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 0);
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do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 0);
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do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, 1);
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do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, 1);
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do_test (&json_ctx, CHARBYTES * i, 2 * CHARBYTES * i, 8 << i, MIDCHAR, -1);
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do_test (&json_ctx, 2 * CHARBYTES * i, CHARBYTES * i, 8 << i, LARGECHAR, -1);
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}
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json_array_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_document_end (&json_ctx);
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return ret;
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}
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#include <support/test-driver.c>
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