| 1 | /* |
| 2 | * test-bitfield.c |
| 3 | * |
| 4 | * BabelTrace - bitfield test program |
| 5 | * |
| 6 | * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; under version 2 of the License. |
| 11 | * |
| 12 | * This program is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | * GNU General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License along |
| 18 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 19 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | */ |
| 21 | |
| 22 | #define _GNU_SOURCE |
| 23 | #include <babeltrace/bitfield.h> |
| 24 | #include <time.h> |
| 25 | #include <stdlib.h> |
| 26 | #include <stdio.h> |
| 27 | |
| 28 | unsigned int glob; |
| 29 | |
| 30 | /* |
| 31 | * This function is only declared to show the size of a bitfield write in |
| 32 | * objdump. |
| 33 | */ |
| 34 | void fct(void) |
| 35 | { |
| 36 | bt_bitfield_write(&glob, unsigned int, 12, 15, 0x12345678); |
| 37 | } |
| 38 | |
| 39 | /* Test array size, in bytes */ |
| 40 | #define TEST_LEN 128 |
| 41 | #define NR_TESTS 10 |
| 42 | |
| 43 | unsigned int srcrand; |
| 44 | |
| 45 | #if defined(__i386) || defined(__x86_64) |
| 46 | |
| 47 | static inline int fls(int x) |
| 48 | { |
| 49 | int r; |
| 50 | asm("bsrl %1,%0\n\t" |
| 51 | "cmovzl %2,%0" |
| 52 | : "=&r" (r) : "rm" (x), "rm" (-1)); |
| 53 | return r + 1; |
| 54 | } |
| 55 | |
| 56 | #elif defined(__PPC__) |
| 57 | |
| 58 | static __inline__ int fls(unsigned int x) |
| 59 | { |
| 60 | int lz; |
| 61 | |
| 62 | asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x)); |
| 63 | return 32 - lz; |
| 64 | } |
| 65 | |
| 66 | #else |
| 67 | |
| 68 | static int fls(unsigned int x) |
| 69 | { |
| 70 | int r = 32; |
| 71 | |
| 72 | if (!x) |
| 73 | return 0; |
| 74 | if (!(x & 0xFFFF0000U)) { |
| 75 | x <<= 16; |
| 76 | r -= 16; |
| 77 | } |
| 78 | if (!(x & 0xFF000000U)) { |
| 79 | x <<= 8; |
| 80 | r -= 8; |
| 81 | } |
| 82 | if (!(x & 0xF0000000U)) { |
| 83 | x <<= 4; |
| 84 | r -= 4; |
| 85 | } |
| 86 | if (!(x & 0xC0000000U)) { |
| 87 | x <<= 2; |
| 88 | r -= 2; |
| 89 | } |
| 90 | if (!(x & 0x80000000U)) { |
| 91 | x <<= 1; |
| 92 | r -= 1; |
| 93 | } |
| 94 | return r; |
| 95 | } |
| 96 | |
| 97 | #endif |
| 98 | |
| 99 | #define print_byte_array(c, len) \ |
| 100 | do { \ |
| 101 | unsigned long i; \ |
| 102 | \ |
| 103 | for (i = 0; i < (len); i++) { \ |
| 104 | printf("0x%X", (c)[i]); \ |
| 105 | if (i != (len) - 1) \ |
| 106 | printf(" "); \ |
| 107 | } \ |
| 108 | printf("\n"); \ |
| 109 | } while (0) |
| 110 | |
| 111 | #define init_byte_array(c, len, val) \ |
| 112 | do { \ |
| 113 | unsigned long i; \ |
| 114 | \ |
| 115 | for (i = 0; i < (len); i++) \ |
| 116 | (c)[i] = (val); \ |
| 117 | } while (0) |
| 118 | |
| 119 | int run_test_unsigned(void) |
| 120 | { |
| 121 | unsigned int src, nrbits; |
| 122 | union { |
| 123 | unsigned char c[TEST_LEN]; |
| 124 | unsigned short s[TEST_LEN/sizeof(unsigned short)]; |
| 125 | unsigned int i[TEST_LEN/sizeof(unsigned int)]; |
| 126 | unsigned long l[TEST_LEN/sizeof(unsigned long)]; |
| 127 | unsigned long long ll[TEST_LEN/sizeof(unsigned long long)]; |
| 128 | } target; |
| 129 | unsigned long long readval; |
| 130 | unsigned int s, l; |
| 131 | int err = 0; |
| 132 | |
| 133 | printf("Running unsigned test with 0x%X\n", srcrand); |
| 134 | |
| 135 | src = srcrand; |
| 136 | nrbits = fls(src); |
| 137 | |
| 138 | for (s = 0; s < CHAR_BIT * TEST_LEN; s++) { |
| 139 | for (l = nrbits; l < (CHAR_BIT * TEST_LEN) - s; l++) { |
| 140 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 141 | bt_bitfield_write(target.c, unsigned char, s, l, src); |
| 142 | bt_bitfield_read(target.c, unsigned char, s, l, &readval); |
| 143 | if (readval != src) { |
| 144 | printf("Error (bytewise) src %X read %llX shift %d len %d\n", |
| 145 | src, readval, s, l); |
| 146 | print_byte_array(target.c, TEST_LEN); |
| 147 | err = 1; |
| 148 | } |
| 149 | |
| 150 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 151 | bt_bitfield_write(target.s, unsigned short, s, l, src); |
| 152 | bt_bitfield_read(target.c, unsigned char, s, l, &readval); |
| 153 | if (readval != src) { |
| 154 | printf("Error (shortwise) src %X read %llX shift %d len %d\n", |
| 155 | src, readval, s, l); |
| 156 | print_byte_array(target.c, TEST_LEN); |
| 157 | err = 1; |
| 158 | } |
| 159 | |
| 160 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 161 | bt_bitfield_write(target.i, unsigned int, s, l, src); |
| 162 | bt_bitfield_read(target.c, unsigned char, s, l, &readval); |
| 163 | if (readval != src) { |
| 164 | printf("Error (intwise) src %X read %llX shift %d len %d\n", |
| 165 | src, readval, s, l); |
| 166 | print_byte_array(target.c, TEST_LEN); |
| 167 | err = 1; |
| 168 | } |
| 169 | |
| 170 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 171 | bt_bitfield_write(target.l, unsigned long, s, l, src); |
| 172 | bt_bitfield_read(target.c, unsigned char, s, l, &readval); |
| 173 | if (readval != src) { |
| 174 | printf("Error (longwise) src %X read %llX shift %d len %d\n", |
| 175 | src, readval, s, l); |
| 176 | print_byte_array(target.c, TEST_LEN); |
| 177 | err = 1; |
| 178 | } |
| 179 | |
| 180 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 181 | bt_bitfield_write(target.ll, unsigned long long, s, l, src); |
| 182 | bt_bitfield_read(target.c, unsigned char, s, l, &readval); |
| 183 | if (readval != src) { |
| 184 | printf("Error (longlongwise) src %X read %llX shift %d len %d\n", |
| 185 | src, readval, s, l); |
| 186 | print_byte_array(target.c, TEST_LEN); |
| 187 | err = 1; |
| 188 | } |
| 189 | } |
| 190 | } |
| 191 | if (!err) |
| 192 | printf("Success!\n"); |
| 193 | else |
| 194 | printf("Failed!\n"); |
| 195 | return err; |
| 196 | } |
| 197 | |
| 198 | int run_test_signed(void) |
| 199 | { |
| 200 | int src, nrbits; |
| 201 | union { |
| 202 | signed char c[TEST_LEN]; |
| 203 | short s[TEST_LEN/sizeof(short)]; |
| 204 | int i[TEST_LEN/sizeof(int)]; |
| 205 | long l[TEST_LEN/sizeof(long)]; |
| 206 | long long ll[TEST_LEN/sizeof(long long)]; |
| 207 | } target; |
| 208 | long long readval; |
| 209 | unsigned int s, l; |
| 210 | int err = 0; |
| 211 | |
| 212 | printf("Running signed test with 0x%X\n", srcrand); |
| 213 | |
| 214 | src = srcrand; |
| 215 | if (src & 0x80000000U) |
| 216 | nrbits = fls(~src) + 1; /* Find least significant bit conveying sign */ |
| 217 | else |
| 218 | nrbits = fls(src) + 1; /* Keep sign at 0 */ |
| 219 | |
| 220 | for (s = 0; s < 8 * TEST_LEN; s++) { |
| 221 | for (l = nrbits; l < (8 * TEST_LEN) - s; l++) { |
| 222 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 223 | bt_bitfield_write(target.c, signed char, s, l, src); |
| 224 | bt_bitfield_read(target.c, signed char, s, l, &readval); |
| 225 | if (readval != src) { |
| 226 | printf("Error (bytewise) src %X read %llX shift %d len %d\n", |
| 227 | src, readval, s, l); |
| 228 | print_byte_array(target.c, TEST_LEN); |
| 229 | err = 1; |
| 230 | } |
| 231 | |
| 232 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 233 | bt_bitfield_write(target.s, short, s, l, src); |
| 234 | bt_bitfield_read(target.c, signed char, s, l, &readval); |
| 235 | if (readval != src) { |
| 236 | printf("Error (shortwise) src %X read %llX shift %d len %d\n", |
| 237 | src, readval, s, l); |
| 238 | print_byte_array(target.c, TEST_LEN); |
| 239 | err = 1; |
| 240 | } |
| 241 | |
| 242 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 243 | bt_bitfield_write(target.i, int, s, l, src); |
| 244 | bt_bitfield_read(target.c, signed char, s, l, &readval); |
| 245 | if (readval != src) { |
| 246 | printf("Error (intwise) src %X read %llX shift %d len %d\n", |
| 247 | src, readval, s, l); |
| 248 | print_byte_array(target.c, TEST_LEN); |
| 249 | err = 1; |
| 250 | } |
| 251 | |
| 252 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 253 | bt_bitfield_write(target.l, long, s, l, src); |
| 254 | bt_bitfield_read(target.c, signed char, s, l, &readval); |
| 255 | if (readval != src) { |
| 256 | printf("Error (longwise) src %X read %llX shift %d len %d\n", |
| 257 | src, readval, s, l); |
| 258 | print_byte_array(target.c, TEST_LEN); |
| 259 | err = 1; |
| 260 | } |
| 261 | |
| 262 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 263 | bt_bitfield_write(target.ll, long long, s, l, src); |
| 264 | bt_bitfield_read(target.c, signed char, s, l, &readval); |
| 265 | if (readval != src) { |
| 266 | printf("Error (longlongwise) src %X read %llX shift %d len %d\n", |
| 267 | src, readval, s, l); |
| 268 | print_byte_array(target.c, TEST_LEN); |
| 269 | err = 1; |
| 270 | } |
| 271 | } |
| 272 | } |
| 273 | if (!err) |
| 274 | printf("Success!\n"); |
| 275 | else |
| 276 | printf("Failed!\n"); |
| 277 | return err; |
| 278 | } |
| 279 | |
| 280 | int run_test(void) |
| 281 | { |
| 282 | int err = 0; |
| 283 | int i; |
| 284 | |
| 285 | srand(time(NULL)); |
| 286 | |
| 287 | srcrand = 0; |
| 288 | err |= run_test_unsigned(); |
| 289 | srcrand = 0; |
| 290 | err |= run_test_signed(); |
| 291 | srcrand = 1; |
| 292 | err |= run_test_unsigned(); |
| 293 | srcrand = ~0U; |
| 294 | err |= run_test_unsigned(); |
| 295 | srcrand = -1; |
| 296 | err |= run_test_signed(); |
| 297 | srcrand = (int)0x80000000U; |
| 298 | err |= run_test_signed(); |
| 299 | |
| 300 | for (i = 0; i < NR_TESTS; i++) { |
| 301 | srcrand = rand(); |
| 302 | err |= run_test_unsigned(); |
| 303 | err |= run_test_signed(); |
| 304 | } |
| 305 | return err; |
| 306 | } |
| 307 | |
| 308 | int main(int argc, char **argv) |
| 309 | { |
| 310 | unsigned long src; |
| 311 | unsigned int shift, len; |
| 312 | int ret; |
| 313 | union { |
| 314 | unsigned char c[8]; |
| 315 | unsigned short s[4]; |
| 316 | unsigned int i[2]; |
| 317 | unsigned long l[2]; |
| 318 | unsigned long long ll[1]; |
| 319 | } target; |
| 320 | unsigned long long readval; |
| 321 | |
| 322 | if (argc > 1) |
| 323 | src = atoi(argv[1]); |
| 324 | else |
| 325 | src = 0x12345678; |
| 326 | if (argc > 2) |
| 327 | shift = atoi(argv[2]); |
| 328 | else |
| 329 | shift = 12; |
| 330 | if (argc > 3) |
| 331 | len = atoi(argv[3]); |
| 332 | else |
| 333 | len = 40; |
| 334 | |
| 335 | target.i[0] = 0xFFFFFFFF; |
| 336 | target.i[1] = 0xFFFFFFFF; |
| 337 | bt_bitfield_write(target.c, unsigned char, shift, len, src); |
| 338 | printf("bytewise\n"); |
| 339 | print_byte_array(target.c, 8); |
| 340 | |
| 341 | target.i[0] = 0xFFFFFFFF; |
| 342 | target.i[1] = 0xFFFFFFFF; |
| 343 | bt_bitfield_write(target.s, unsigned short, shift, len, src); |
| 344 | printf("shortwise\n"); |
| 345 | print_byte_array(target.c, 8); |
| 346 | |
| 347 | target.i[0] = 0xFFFFFFFF; |
| 348 | target.i[1] = 0xFFFFFFFF; |
| 349 | bt_bitfield_write(target.i, unsigned int, shift, len, src); |
| 350 | printf("intwise\n"); |
| 351 | print_byte_array(target.c, 8); |
| 352 | |
| 353 | target.i[0] = 0xFFFFFFFF; |
| 354 | target.i[1] = 0xFFFFFFFF; |
| 355 | bt_bitfield_write(target.l, unsigned long, shift, len, src); |
| 356 | printf("longwise\n"); |
| 357 | print_byte_array(target.c, 8); |
| 358 | |
| 359 | target.i[0] = 0xFFFFFFFF; |
| 360 | target.i[1] = 0xFFFFFFFF; |
| 361 | bt_bitfield_write(target.ll, unsigned long long, shift, len, src); |
| 362 | printf("lluwise\n"); |
| 363 | print_byte_array(target.c, 8); |
| 364 | |
| 365 | bt_bitfield_read(target.c, unsigned char, shift, len, &readval); |
| 366 | printf("read: %llX\n", readval); |
| 367 | |
| 368 | ret = run_test(); |
| 369 | |
| 370 | return ret; |
| 371 | } |