xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Measure memmove functions. |
| 2 | Copyright (C) 2013-2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #define TEST_MAIN |
| 20 | #ifdef TEST_BCOPY |
| 21 | # define TEST_NAME "bcopy" |
| 22 | #else |
| 23 | # define TEST_NAME "memmove" |
| 24 | #endif |
| 25 | #include "bench-string.h" |
| 26 | |
| 27 | char *simple_memmove (char *, const char *, size_t); |
| 28 | |
| 29 | #ifdef TEST_BCOPY |
| 30 | typedef void (*proto_t) (const char *, char *, size_t); |
| 31 | void simple_bcopy (const char *, char *, size_t); |
| 32 | |
| 33 | IMPL (simple_bcopy, 0) |
| 34 | IMPL (bcopy, 1) |
| 35 | |
| 36 | void |
| 37 | simple_bcopy (const char *src, char *dst, size_t n) |
| 38 | { |
| 39 | simple_memmove (dst, src, n); |
| 40 | } |
| 41 | #else |
| 42 | typedef char *(*proto_t) (char *, const char *, size_t); |
| 43 | |
| 44 | IMPL (simple_memmove, 0) |
| 45 | IMPL (memmove, 1) |
| 46 | #endif |
| 47 | |
| 48 | char * |
| 49 | inhibit_loop_to_libcall |
| 50 | simple_memmove (char *dst, const char *src, size_t n) |
| 51 | { |
| 52 | char *ret = dst; |
| 53 | if (src < dst) |
| 54 | { |
| 55 | dst += n; |
| 56 | src += n; |
| 57 | while (n--) |
| 58 | *--dst = *--src; |
| 59 | } |
| 60 | else |
| 61 | while (n--) |
| 62 | *dst++ = *src++; |
| 63 | return ret; |
| 64 | } |
| 65 | |
| 66 | static void |
| 67 | do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src, |
| 68 | size_t len) |
| 69 | { |
| 70 | size_t i, iters = INNER_LOOP_ITERS; |
| 71 | timing_t start, stop, cur; |
| 72 | |
| 73 | memcpy (src, orig_src, len); |
| 74 | #ifdef TEST_BCOPY |
| 75 | CALL (impl, src, dst, len); |
| 76 | #else |
| 77 | char *res; |
| 78 | |
| 79 | res = CALL (impl, dst, src, len); |
| 80 | if (res != dst) |
| 81 | { |
| 82 | error (0, 0, "Wrong result in function %s %p %p", impl->name, |
| 83 | res, dst); |
| 84 | ret = 1; |
| 85 | return; |
| 86 | } |
| 87 | #endif |
| 88 | |
| 89 | if (memcmp (dst, orig_src, len) != 0) |
| 90 | { |
| 91 | error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"", |
| 92 | impl->name, dst, src); |
| 93 | ret = 1; |
| 94 | return; |
| 95 | } |
| 96 | |
| 97 | TIMING_NOW (start); |
| 98 | for (i = 0; i < iters; ++i) |
| 99 | { |
| 100 | #ifdef TEST_BCOPY |
| 101 | CALL (impl, src, dst, len); |
| 102 | #else |
| 103 | CALL (impl, dst, src, len); |
| 104 | #endif |
| 105 | } |
| 106 | TIMING_NOW (stop); |
| 107 | |
| 108 | TIMING_DIFF (cur, start, stop); |
| 109 | |
| 110 | TIMING_PRINT_MEAN ((double) cur, (double) iters); |
| 111 | } |
| 112 | |
| 113 | static void |
| 114 | do_test (size_t align1, size_t align2, size_t len) |
| 115 | { |
| 116 | size_t i, j; |
| 117 | char *s1, *s2; |
| 118 | |
| 119 | align1 &= 63; |
| 120 | if (align1 + len >= page_size) |
| 121 | return; |
| 122 | |
| 123 | align2 &= 63; |
| 124 | if (align2 + len >= page_size) |
| 125 | return; |
| 126 | |
| 127 | s1 = (char *) (buf1 + align1); |
| 128 | s2 = (char *) (buf2 + align2); |
| 129 | |
| 130 | for (i = 0, j = 1; i < len; i++, j += 23) |
| 131 | s1[i] = j; |
| 132 | |
| 133 | printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2); |
| 134 | |
| 135 | FOR_EACH_IMPL (impl, 0) |
| 136 | do_one_test (impl, s2, (char *) (buf2 + align1), s1, len); |
| 137 | |
| 138 | putchar ('\n'); |
| 139 | } |
| 140 | |
| 141 | int |
| 142 | test_main (void) |
| 143 | { |
| 144 | size_t i; |
| 145 | |
| 146 | test_init (); |
| 147 | |
| 148 | printf ("%23s", ""); |
| 149 | FOR_EACH_IMPL (impl, 0) |
| 150 | printf ("\t%s", impl->name); |
| 151 | putchar ('\n'); |
| 152 | |
| 153 | for (i = 0; i < 14; ++i) |
| 154 | { |
| 155 | do_test (0, 32, 1 << i); |
| 156 | do_test (32, 0, 1 << i); |
| 157 | do_test (0, i, 1 << i); |
| 158 | do_test (i, 0, 1 << i); |
| 159 | } |
| 160 | |
| 161 | for (i = 0; i < 32; ++i) |
| 162 | { |
| 163 | do_test (0, 32, i); |
| 164 | do_test (32, 0, i); |
| 165 | do_test (0, i, i); |
| 166 | do_test (i, 0, i); |
| 167 | } |
| 168 | |
| 169 | for (i = 3; i < 32; ++i) |
| 170 | { |
| 171 | if ((i & (i - 1)) == 0) |
| 172 | continue; |
| 173 | do_test (0, 32, 16 * i); |
| 174 | do_test (32, 0, 16 * i); |
| 175 | do_test (0, i, 16 * i); |
| 176 | do_test (i, 0, 16 * i); |
| 177 | } |
| 178 | |
| 179 | return ret; |
| 180 | } |
| 181 | |
| 182 | #include "../test-skeleton.c" |