| 1 | /* |
| 2 | * test-bitfield.c |
| 3 | * |
| 4 | * Common Trace Format - bitfield test program |
| 5 | * |
| 6 | * Copyright February 2009 - 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; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License along |
| 19 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 21 | */ |
| 22 | |
| 23 | #define _GNU_SOURCE |
| 24 | #include <ctf/bitfield.h> |
| 25 | #include <stdio.h> |
| 26 | |
| 27 | unsigned int glob; |
| 28 | |
| 29 | /* |
| 30 | * This function is only declared to show the size of a bitfield write in |
| 31 | * objdump. |
| 32 | */ |
| 33 | void fct(void) |
| 34 | { |
| 35 | ctf_bitfield_write(&glob, 12, 15, 0x12345678); |
| 36 | } |
| 37 | |
| 38 | /* Test array size, in bytes */ |
| 39 | #define TEST_LEN 128 |
| 40 | #define NR_TESTS 10 |
| 41 | |
| 42 | unsigned int srcrand; |
| 43 | |
| 44 | #if defined(__i386) || defined(__x86_64) |
| 45 | |
| 46 | static inline int fls(int x) |
| 47 | { |
| 48 | int r; |
| 49 | asm("bsrl %1,%0\n\t" |
| 50 | "cmovzl %2,%0" |
| 51 | : "=&r" (r) : "rm" (x), "rm" (-1)); |
| 52 | return r + 1; |
| 53 | } |
| 54 | |
| 55 | #elif defined(__PPC__) |
| 56 | |
| 57 | static __inline__ int fls(unsigned int x) |
| 58 | { |
| 59 | int lz; |
| 60 | |
| 61 | asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x)); |
| 62 | return 32 - lz; |
| 63 | } |
| 64 | |
| 65 | #else |
| 66 | |
| 67 | static int fls(unsigned int x) |
| 68 | { |
| 69 | int r = 32; |
| 70 | |
| 71 | if (!x) |
| 72 | return 0; |
| 73 | if (!(x & 0xFFFF0000U)) { |
| 74 | x <<= 16; |
| 75 | r -= 16; |
| 76 | } |
| 77 | if (!(x & 0xFF000000U)) { |
| 78 | x <<= 8; |
| 79 | r -= 8; |
| 80 | } |
| 81 | if (!(x & 0xF0000000U)) { |
| 82 | x <<= 4; |
| 83 | r -= 4; |
| 84 | } |
| 85 | if (!(x & 0xC0000000U)) { |
| 86 | x <<= 2; |
| 87 | r -= 2; |
| 88 | } |
| 89 | if (!(x & 0x80000000U)) { |
| 90 | x <<= 1; |
| 91 | r -= 1; |
| 92 | } |
| 93 | return r; |
| 94 | } |
| 95 | |
| 96 | #endif |
| 97 | |
| 98 | static void print_byte_array(const unsigned char *c, unsigned long len) |
| 99 | { |
| 100 | unsigned long i; |
| 101 | |
| 102 | for (i = 0; i < len; i++) { |
| 103 | printf("0x%X", c[i]); |
| 104 | if (i != len - 1) |
| 105 | printf(" "); |
| 106 | } |
| 107 | printf("\n"); |
| 108 | } |
| 109 | |
| 110 | static void init_byte_array(unsigned char *c, |
| 111 | unsigned long len, |
| 112 | unsigned char val) |
| 113 | { |
| 114 | unsigned long i; |
| 115 | |
| 116 | for (i = 0; i < len; i++) |
| 117 | c[i] = val; |
| 118 | } |
| 119 | |
| 120 | int run_test_unsigned(void) |
| 121 | { |
| 122 | unsigned int src, nrbits; |
| 123 | union { |
| 124 | unsigned char c[TEST_LEN]; |
| 125 | unsigned short s[TEST_LEN/sizeof(unsigned short)]; |
| 126 | unsigned int i[TEST_LEN/sizeof(unsigned int)]; |
| 127 | unsigned long l[TEST_LEN/sizeof(unsigned long)]; |
| 128 | unsigned long long ll[TEST_LEN/sizeof(unsigned long long)]; |
| 129 | } target; |
| 130 | uint64_t readval; |
| 131 | unsigned int s, l; |
| 132 | int err = 0; |
| 133 | |
| 134 | printf("Running unsigned test with 0x%X\n", srcrand); |
| 135 | |
| 136 | src = srcrand; |
| 137 | nrbits = fls(src); |
| 138 | |
| 139 | for (s = 0; s < CHAR_BIT * TEST_LEN; s++) { |
| 140 | for (l = nrbits; l < (CHAR_BIT * TEST_LEN) - s; l++) { |
| 141 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 142 | ctf_bitfield_write(target.c, s, l, src); |
| 143 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 0); |
| 144 | if (readval != src) { |
| 145 | printf("Error (bytewise) src %lX read %llX shift %d len %d\n", |
| 146 | src, readval, s, l); |
| 147 | print_byte_array(target.c, TEST_LEN); |
| 148 | err = 1; |
| 149 | } |
| 150 | |
| 151 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 152 | ctf_bitfield_write(target.s, s, l, src); |
| 153 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 0); |
| 154 | if (readval != src) { |
| 155 | printf("Error (shortwise) src %lX read %llX shift %d len %d\n", |
| 156 | src, readval, s, l); |
| 157 | print_byte_array(target.c, TEST_LEN); |
| 158 | err = 1; |
| 159 | } |
| 160 | |
| 161 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 162 | ctf_bitfield_write(target.i, s, l, src); |
| 163 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 0); |
| 164 | if (readval != src) { |
| 165 | printf("Error (intwise) src %lX read %llX shift %d len %d\n", |
| 166 | src, readval, s, l); |
| 167 | print_byte_array(target.c, TEST_LEN); |
| 168 | err = 1; |
| 169 | } |
| 170 | |
| 171 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 172 | ctf_bitfield_write(target.l, s, l, src); |
| 173 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 0); |
| 174 | if (readval != src) { |
| 175 | printf("Error (longwise) src %lX read %llX shift %d len %d\n", |
| 176 | src, readval, s, l); |
| 177 | print_byte_array(target.c, TEST_LEN); |
| 178 | err = 1; |
| 179 | } |
| 180 | |
| 181 | init_byte_array(target.c, TEST_LEN, 0xFF); |
| 182 | ctf_bitfield_write(target.ll, s, l, src); |
| 183 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 0); |
| 184 | if (readval != src) { |
| 185 | printf("Error (longlongwise) src %lX read %llX shift %d len %d\n", |
| 186 | src, readval, s, l); |
| 187 | print_byte_array(target.c, TEST_LEN); |
| 188 | err = 1; |
| 189 | } |
| 190 | } |
| 191 | } |
| 192 | if (!err) |
| 193 | printf("Success!\n"); |
| 194 | else |
| 195 | printf("Failed!\n"); |
| 196 | return err; |
| 197 | } |
| 198 | |
| 199 | int run_test_signed(void) |
| 200 | { |
| 201 | int src, nrbits; |
| 202 | union { |
| 203 | char c[TEST_LEN]; |
| 204 | short s[TEST_LEN/sizeof(short)]; |
| 205 | int i[TEST_LEN/sizeof(int)]; |
| 206 | long l[TEST_LEN/sizeof(long)]; |
| 207 | long long ll[TEST_LEN/sizeof(long long)]; |
| 208 | } target; |
| 209 | int64_t readval; |
| 210 | unsigned int s, l; |
| 211 | int err = 0; |
| 212 | |
| 213 | printf("Running signed test with 0x%X\n", srcrand); |
| 214 | |
| 215 | src = srcrand; |
| 216 | if (src & 0x80000000U) |
| 217 | nrbits = fls(~src) + 1; /* Find least significant bit conveying sign */ |
| 218 | else |
| 219 | nrbits = fls(src) + 1; /* Keep sign at 0 */ |
| 220 | |
| 221 | for (s = 0; s < 8 * TEST_LEN; s++) { |
| 222 | for (l = nrbits; l < (8 * TEST_LEN) - s; l++) { |
| 223 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 224 | ctf_bitfield_write(target.c, s, l, src); |
| 225 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 1); |
| 226 | if (readval != src) { |
| 227 | printf("Error (bytewise) src %lX read %llX shift %d len %d\n", |
| 228 | src, readval, s, l); |
| 229 | print_byte_array(target.c, TEST_LEN); |
| 230 | err = 1; |
| 231 | } |
| 232 | |
| 233 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 234 | ctf_bitfield_write(target.s, s, l, src); |
| 235 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 1); |
| 236 | if (readval != src) { |
| 237 | printf("Error (shortwise) src %lX read %llX shift %d len %d\n", |
| 238 | src, readval, s, l); |
| 239 | print_byte_array(target.c, TEST_LEN); |
| 240 | err = 1; |
| 241 | } |
| 242 | |
| 243 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 244 | ctf_bitfield_write(target.i, s, l, src); |
| 245 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 1); |
| 246 | if (readval != src) { |
| 247 | printf("Error (intwise) src %lX read %llX shift %d len %d\n", |
| 248 | src, readval, s, l); |
| 249 | print_byte_array(target.c, TEST_LEN); |
| 250 | err = 1; |
| 251 | } |
| 252 | |
| 253 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 254 | ctf_bitfield_write(target.l, s, l, src); |
| 255 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 1); |
| 256 | if (readval != src) { |
| 257 | printf("Error (longwise) src %lX read %llX shift %d len %d\n", |
| 258 | src, readval, s, l); |
| 259 | print_byte_array(target.c, TEST_LEN); |
| 260 | err = 1; |
| 261 | } |
| 262 | |
| 263 | init_byte_array(target.c, TEST_LEN, 0x0); |
| 264 | ctf_bitfield_write(target.ll, s, l, src); |
| 265 | readval = _ctf_bitfield_read_64(target.c, s, l, BYTE_ORDER, 1); |
| 266 | if (readval != src) { |
| 267 | printf("Error (longlongwise) src %lX read %llX shift %d len %d\n", |
| 268 | src, readval, s, l); |
| 269 | print_byte_array(target.c, TEST_LEN); |
| 270 | err = 1; |
| 271 | } |
| 272 | } |
| 273 | } |
| 274 | if (!err) |
| 275 | printf("Success!\n"); |
| 276 | else |
| 277 | printf("Failed!\n"); |
| 278 | return err; |
| 279 | } |
| 280 | |
| 281 | int run_test(void) |
| 282 | { |
| 283 | int err = 0; |
| 284 | int i; |
| 285 | |
| 286 | srand(time(NULL)); |
| 287 | |
| 288 | srcrand = 0; |
| 289 | err |= run_test_unsigned(); |
| 290 | srcrand = 0; |
| 291 | err |= run_test_signed(); |
| 292 | srcrand = 1; |
| 293 | err |= run_test_unsigned(); |
| 294 | srcrand = ~0U; |
| 295 | err |= run_test_unsigned(); |
| 296 | srcrand = -1; |
| 297 | err |= run_test_signed(); |
| 298 | srcrand = (int)0x80000000U; |
| 299 | err |= run_test_signed(); |
| 300 | |
| 301 | for (i = 0; i < NR_TESTS; i++) { |
| 302 | srcrand = rand(); |
| 303 | err |= run_test_unsigned(); |
| 304 | err |= run_test_signed(); |
| 305 | } |
| 306 | return err; |
| 307 | } |
| 308 | |
| 309 | int main(int argc, char **argv) |
| 310 | { |
| 311 | unsigned long src; |
| 312 | unsigned int shift, len; |
| 313 | int ret; |
| 314 | union { |
| 315 | unsigned char c[8]; |
| 316 | unsigned short s[4]; |
| 317 | unsigned int i[2]; |
| 318 | unsigned long l[2]; |
| 319 | unsigned long long ll[1]; |
| 320 | } target; |
| 321 | uint64_t readval; |
| 322 | |
| 323 | if (argc > 1) |
| 324 | src = atoi(argv[1]); |
| 325 | else |
| 326 | src = 0x12345678; |
| 327 | if (argc > 2) |
| 328 | shift = atoi(argv[2]); |
| 329 | else |
| 330 | shift = 12; |
| 331 | if (argc > 3) |
| 332 | len = atoi(argv[3]); |
| 333 | else |
| 334 | len = 40; |
| 335 | |
| 336 | target.i[0] = 0xFFFFFFFF; |
| 337 | target.i[1] = 0xFFFFFFFF; |
| 338 | ctf_bitfield_write(target.c, shift, len, src); |
| 339 | printf("bytewise\n"); |
| 340 | print_byte_array(target.c, 8); |
| 341 | |
| 342 | target.i[0] = 0xFFFFFFFF; |
| 343 | target.i[1] = 0xFFFFFFFF; |
| 344 | ctf_bitfield_write(target.s, shift, len, src); |
| 345 | printf("shortwise\n"); |
| 346 | print_byte_array(target.c, 8); |
| 347 | |
| 348 | target.i[0] = 0xFFFFFFFF; |
| 349 | target.i[1] = 0xFFFFFFFF; |
| 350 | ctf_bitfield_write(target.i, shift, len, src); |
| 351 | printf("intwise\n"); |
| 352 | print_byte_array(target.c, 8); |
| 353 | |
| 354 | target.i[0] = 0xFFFFFFFF; |
| 355 | target.i[1] = 0xFFFFFFFF; |
| 356 | ctf_bitfield_write(target.l, shift, len, src); |
| 357 | printf("longwise\n"); |
| 358 | print_byte_array(target.c, 8); |
| 359 | |
| 360 | target.i[0] = 0xFFFFFFFF; |
| 361 | target.i[1] = 0xFFFFFFFF; |
| 362 | ctf_bitfield_write(target.ll, shift, len, src); |
| 363 | printf("lluwise\n"); |
| 364 | print_byte_array(target.c, 8); |
| 365 | |
| 366 | readval = _ctf_bitfield_read_64(target.c, shift, len, BYTE_ORDER, 0); |
| 367 | printf("read: %llX\n", readval); |
| 368 | |
| 369 | ret = run_test(); |
| 370 | |
| 371 | return ret; |
| 372 | } |