1 //===- llvm/unittest/ADT/APInt.cpp - APInt unit tests ---------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "llvm/ADT/APInt.h" 11 #include "llvm/ADT/SmallString.h" 12 #include "gtest/gtest.h" 13 #include <ostream> 14 15 using namespace llvm; 16 17 namespace { 18 19 // Test that APInt shift left works when bitwidth > 64 and shiftamt == 0 20 TEST(APIntTest, ShiftLeftByZero) { 21 APInt One = APInt::getNullValue(65) + 1; 22 APInt Shl = One.shl(0); 23 EXPECT_TRUE(Shl[0]); 24 EXPECT_FALSE(Shl[1]); 25 } 26 27 TEST(APIntTest, i128_NegativeCount) { 28 APInt Minus3(128, static_cast<uint64_t>(-3), true); 29 EXPECT_EQ(126u, Minus3.countLeadingOnes()); 30 EXPECT_EQ(-3, Minus3.getSExtValue()); 31 32 APInt Minus1(128, static_cast<uint64_t>(-1), true); 33 EXPECT_EQ(0u, Minus1.countLeadingZeros()); 34 EXPECT_EQ(128u, Minus1.countLeadingOnes()); 35 EXPECT_EQ(128u, Minus1.getActiveBits()); 36 EXPECT_EQ(0u, Minus1.countTrailingZeros()); 37 EXPECT_EQ(128u, Minus1.countTrailingOnes()); 38 EXPECT_EQ(128u, Minus1.countPopulation()); 39 EXPECT_EQ(-1, Minus1.getSExtValue()); 40 } 41 42 // XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it. 43 #if defined(__llvm__) || !defined(__FreeBSD__) 44 45 TEST(APIntTest, i33_Count) { 46 APInt i33minus2(33, static_cast<uint64_t>(-2), true); 47 EXPECT_EQ(0u, i33minus2.countLeadingZeros()); 48 EXPECT_EQ(32u, i33minus2.countLeadingOnes()); 49 EXPECT_EQ(33u, i33minus2.getActiveBits()); 50 EXPECT_EQ(1u, i33minus2.countTrailingZeros()); 51 EXPECT_EQ(32u, i33minus2.countPopulation()); 52 EXPECT_EQ(-2, i33minus2.getSExtValue()); 53 EXPECT_EQ(((uint64_t)-2)&((1ull<<33) -1), i33minus2.getZExtValue()); 54 } 55 56 #endif 57 58 TEST(APIntTest, i65_Count) { 59 APInt i65(65, 0, true); 60 EXPECT_EQ(65u, i65.countLeadingZeros()); 61 EXPECT_EQ(0u, i65.countLeadingOnes()); 62 EXPECT_EQ(0u, i65.getActiveBits()); 63 EXPECT_EQ(1u, i65.getActiveWords()); 64 EXPECT_EQ(65u, i65.countTrailingZeros()); 65 EXPECT_EQ(0u, i65.countPopulation()); 66 67 APInt i65minus(65, 0, true); 68 i65minus.setBit(64); 69 EXPECT_EQ(0u, i65minus.countLeadingZeros()); 70 EXPECT_EQ(1u, i65minus.countLeadingOnes()); 71 EXPECT_EQ(65u, i65minus.getActiveBits()); 72 EXPECT_EQ(64u, i65minus.countTrailingZeros()); 73 EXPECT_EQ(1u, i65minus.countPopulation()); 74 } 75 76 TEST(APIntTest, i128_PositiveCount) { 77 APInt u128max = APInt::getAllOnesValue(128); 78 EXPECT_EQ(128u, u128max.countLeadingOnes()); 79 EXPECT_EQ(0u, u128max.countLeadingZeros()); 80 EXPECT_EQ(128u, u128max.getActiveBits()); 81 EXPECT_EQ(0u, u128max.countTrailingZeros()); 82 EXPECT_EQ(128u, u128max.countTrailingOnes()); 83 EXPECT_EQ(128u, u128max.countPopulation()); 84 85 APInt u64max(128, static_cast<uint64_t>(-1), false); 86 EXPECT_EQ(64u, u64max.countLeadingZeros()); 87 EXPECT_EQ(0u, u64max.countLeadingOnes()); 88 EXPECT_EQ(64u, u64max.getActiveBits()); 89 EXPECT_EQ(0u, u64max.countTrailingZeros()); 90 EXPECT_EQ(64u, u64max.countTrailingOnes()); 91 EXPECT_EQ(64u, u64max.countPopulation()); 92 EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue()); 93 94 APInt zero(128, 0, true); 95 EXPECT_EQ(128u, zero.countLeadingZeros()); 96 EXPECT_EQ(0u, zero.countLeadingOnes()); 97 EXPECT_EQ(0u, zero.getActiveBits()); 98 EXPECT_EQ(128u, zero.countTrailingZeros()); 99 EXPECT_EQ(0u, zero.countTrailingOnes()); 100 EXPECT_EQ(0u, zero.countPopulation()); 101 EXPECT_EQ(0u, zero.getSExtValue()); 102 EXPECT_EQ(0u, zero.getZExtValue()); 103 104 APInt one(128, 1, true); 105 EXPECT_EQ(127u, one.countLeadingZeros()); 106 EXPECT_EQ(0u, one.countLeadingOnes()); 107 EXPECT_EQ(1u, one.getActiveBits()); 108 EXPECT_EQ(0u, one.countTrailingZeros()); 109 EXPECT_EQ(1u, one.countTrailingOnes()); 110 EXPECT_EQ(1u, one.countPopulation()); 111 EXPECT_EQ(1, one.getSExtValue()); 112 EXPECT_EQ(1u, one.getZExtValue()); 113 } 114 115 TEST(APIntTest, i1) { 116 const APInt neg_two(1, static_cast<uint64_t>(-2), true); 117 const APInt neg_one(1, static_cast<uint64_t>(-1), true); 118 const APInt zero(1, 0); 119 const APInt one(1, 1); 120 const APInt two(1, 2); 121 122 EXPECT_EQ(0, neg_two.getSExtValue()); 123 EXPECT_EQ(-1, neg_one.getSExtValue()); 124 EXPECT_EQ(1u, neg_one.getZExtValue()); 125 EXPECT_EQ(0u, zero.getZExtValue()); 126 EXPECT_EQ(-1, one.getSExtValue()); 127 EXPECT_EQ(1u, one.getZExtValue()); 128 EXPECT_EQ(0u, two.getZExtValue()); 129 EXPECT_EQ(0, two.getSExtValue()); 130 131 // Basic equalities for 1-bit values. 132 EXPECT_EQ(zero, two); 133 EXPECT_EQ(zero, neg_two); 134 EXPECT_EQ(one, neg_one); 135 EXPECT_EQ(two, neg_two); 136 137 // Additions. 138 EXPECT_EQ(two, one + one); 139 EXPECT_EQ(zero, neg_one + one); 140 EXPECT_EQ(neg_two, neg_one + neg_one); 141 142 // Subtractions. 143 EXPECT_EQ(neg_two, neg_one - one); 144 EXPECT_EQ(two, one - neg_one); 145 EXPECT_EQ(zero, one - one); 146 147 // Shifts. 148 EXPECT_EQ(zero, one << one); 149 EXPECT_EQ(one, one << zero); 150 EXPECT_EQ(zero, one.shl(1)); 151 EXPECT_EQ(one, one.shl(0)); 152 EXPECT_EQ(zero, one.lshr(1)); 153 EXPECT_EQ(zero, one.ashr(1)); 154 155 // Rotates. 156 EXPECT_EQ(one, one.rotl(0)); 157 EXPECT_EQ(one, one.rotl(1)); 158 EXPECT_EQ(one, one.rotr(0)); 159 EXPECT_EQ(one, one.rotr(1)); 160 161 // Multiplies. 162 EXPECT_EQ(neg_one, neg_one * one); 163 EXPECT_EQ(neg_one, one * neg_one); 164 EXPECT_EQ(one, neg_one * neg_one); 165 EXPECT_EQ(one, one * one); 166 167 // Divides. 168 EXPECT_EQ(neg_one, one.sdiv(neg_one)); 169 EXPECT_EQ(neg_one, neg_one.sdiv(one)); 170 EXPECT_EQ(one, neg_one.sdiv(neg_one)); 171 EXPECT_EQ(one, one.sdiv(one)); 172 173 EXPECT_EQ(neg_one, one.udiv(neg_one)); 174 EXPECT_EQ(neg_one, neg_one.udiv(one)); 175 EXPECT_EQ(one, neg_one.udiv(neg_one)); 176 EXPECT_EQ(one, one.udiv(one)); 177 178 // Remainders. 179 EXPECT_EQ(zero, neg_one.srem(one)); 180 EXPECT_EQ(zero, neg_one.urem(one)); 181 EXPECT_EQ(zero, one.srem(neg_one)); 182 183 // sdivrem 184 { 185 APInt q(8, 0); 186 APInt r(8, 0); 187 APInt one(8, 1); 188 APInt two(8, 2); 189 APInt nine(8, 9); 190 APInt four(8, 4); 191 192 EXPECT_EQ(nine.srem(two), one); 193 EXPECT_EQ(nine.srem(-two), one); 194 EXPECT_EQ((-nine).srem(two), -one); 195 EXPECT_EQ((-nine).srem(-two), -one); 196 197 APInt::sdivrem(nine, two, q, r); 198 EXPECT_EQ(four, q); 199 EXPECT_EQ(one, r); 200 APInt::sdivrem(-nine, two, q, r); 201 EXPECT_EQ(-four, q); 202 EXPECT_EQ(-one, r); 203 APInt::sdivrem(nine, -two, q, r); 204 EXPECT_EQ(-four, q); 205 EXPECT_EQ(one, r); 206 APInt::sdivrem(-nine, -two, q, r); 207 EXPECT_EQ(four, q); 208 EXPECT_EQ(-one, r); 209 } 210 } 211 212 213 // Tests different div/rem varaints using scheme (a * b + c) / a 214 void testDiv(APInt a, APInt b, APInt c) { 215 ASSERT_TRUE(a.uge(b)); // Must: a >= b 216 ASSERT_TRUE(a.ugt(c)); // Must: a > c 217 218 auto p = a * b + c; 219 220 auto q = p.udiv(a); 221 auto r = p.urem(a); 222 EXPECT_EQ(b, q); 223 EXPECT_EQ(c, r); 224 APInt::udivrem(p, a, q, r); 225 EXPECT_EQ(b, q); 226 EXPECT_EQ(c, r); 227 q = p.sdiv(a); 228 r = p.srem(a); 229 EXPECT_EQ(b, q); 230 EXPECT_EQ(c, r); 231 APInt::sdivrem(p, a, q, r); 232 EXPECT_EQ(b, q); 233 EXPECT_EQ(c, r); 234 235 if (b.ugt(c)) { // Test also symmetric case 236 q = p.udiv(b); 237 r = p.urem(b); 238 EXPECT_EQ(a, q); 239 EXPECT_EQ(c, r); 240 APInt::udivrem(p, b, q, r); 241 EXPECT_EQ(a, q); 242 EXPECT_EQ(c, r); 243 q = p.sdiv(b); 244 r = p.srem(b); 245 EXPECT_EQ(a, q); 246 EXPECT_EQ(c, r); 247 APInt::sdivrem(p, b, q, r); 248 EXPECT_EQ(a, q); 249 EXPECT_EQ(c, r); 250 } 251 } 252 253 TEST(APIntTest, divrem_big1) { 254 // Tests KnuthDiv rare step D6 255 testDiv({256, "1ffffffffffffffff", 16}, 256 {256, "1ffffffffffffffff", 16}, 257 {256, 0}); 258 } 259 260 TEST(APIntTest, divrem_big2) { 261 // Tests KnuthDiv rare step D6 262 testDiv({1024, "112233ceff" 263 "cecece000000ffffffffffffffffffff" 264 "ffffffffffffffffffffffffffffffff" 265 "ffffffffffffffffffffffffffffffff" 266 "ffffffffffffffffffffffffffffff33", 16}, 267 {1024, "111111ffffffffffffffff" 268 "ffffffffffffffffffffffffffffffff" 269 "fffffffffffffffffffffffffffffccf" 270 "ffffffffffffffffffffffffffffff00", 16}, 271 {1024, 7919}); 272 } 273 274 TEST(APIntTest, divrem_big3) { 275 // Tests KnuthDiv case without shift 276 testDiv({256, "80000001ffffffffffffffff", 16}, 277 {256, "ffffffffffffff0000000", 16}, 278 {256, 4219}); 279 } 280 281 TEST(APIntTest, divrem_big4) { 282 // Tests heap allocation in divide() enfoced by huge numbers 283 testDiv(APInt{4096, 5}.shl(2001), 284 APInt{4096, 1}.shl(2000), 285 APInt{4096, 4219*13}); 286 } 287 288 TEST(APIntTest, divrem_big5) { 289 // Tests one word divisor case of divide() 290 testDiv(APInt{1024, 19}.shl(811), 291 APInt{1024, 4356013}, // one word 292 APInt{1024, 1}); 293 } 294 295 TEST(APIntTest, divrem_big6) { 296 // Tests some rare "borrow" cases in D4 step 297 testDiv(APInt{512, "ffffffffffffffff00000000000000000000000001", 16}, 298 APInt{512, "10000000000000001000000000000001", 16}, 299 APInt{512, "10000000000000000000000000000000", 16}); 300 } 301 302 TEST(APIntTest, divrem_big7) { 303 // Yet another test for KnuthDiv rare step D6. 304 testDiv({224, "800000008000000200000005", 16}, 305 {224, "fffffffd", 16}, 306 {224, "80000000800000010000000f", 16}); 307 } 308 309 TEST(APIntTest, fromString) { 310 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2)); 311 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2)); 312 EXPECT_EQ(APInt(32, 2), APInt(32, "10", 2)); 313 EXPECT_EQ(APInt(32, 3), APInt(32, "11", 2)); 314 EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2)); 315 316 EXPECT_EQ(APInt(32, 0), APInt(32, "+0", 2)); 317 EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2)); 318 EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2)); 319 EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2)); 320 EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2)); 321 322 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 2)); 323 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 2)); 324 EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32, "-10", 2)); 325 EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32, "-11", 2)); 326 EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2)); 327 328 329 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8)); 330 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8)); 331 EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8)); 332 EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8)); 333 EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8)); 334 EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8)); 335 336 EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8)); 337 EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8)); 338 EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8)); 339 EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8)); 340 EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8)); 341 EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8)); 342 343 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 8)); 344 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 8)); 345 EXPECT_EQ(APInt(32, uint64_t(-7LL)), APInt(32, "-7", 8)); 346 EXPECT_EQ(APInt(32, uint64_t(-8LL)), APInt(32, "-10", 8)); 347 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-17", 8)); 348 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-20", 8)); 349 350 351 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10)); 352 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10)); 353 EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10)); 354 EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10)); 355 EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10)); 356 EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10)); 357 358 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 10)); 359 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 10)); 360 EXPECT_EQ(APInt(32, uint64_t(-9LL)), APInt(32, "-9", 10)); 361 EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10)); 362 EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10)); 363 EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10)); 364 365 366 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16)); 367 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16)); 368 EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16)); 369 EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16)); 370 EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16)); 371 EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16)); 372 373 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 16)); 374 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 16)); 375 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-F", 16)); 376 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16)); 377 EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16)); 378 EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16)); 379 380 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 36)); 381 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 36)); 382 EXPECT_EQ(APInt(32, 35), APInt(32, "Z", 36)); 383 EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36)); 384 EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36)); 385 EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36)); 386 387 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 36)); 388 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 36)); 389 EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32, "-Z", 36)); 390 EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36)); 391 EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36)); 392 EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36)); 393 } 394 395 TEST(APIntTest, FromArray) { 396 EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1))); 397 } 398 399 TEST(APIntTest, StringBitsNeeded2) { 400 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 2)); 401 EXPECT_EQ(1U, APInt::getBitsNeeded( "1", 2)); 402 EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2)); 403 EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2)); 404 EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2)); 405 406 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 2)); 407 EXPECT_EQ(1U, APInt::getBitsNeeded( "+1", 2)); 408 EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2)); 409 EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2)); 410 EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2)); 411 412 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 2)); 413 EXPECT_EQ(2U, APInt::getBitsNeeded( "-1", 2)); 414 EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2)); 415 EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2)); 416 EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2)); 417 } 418 419 TEST(APIntTest, StringBitsNeeded8) { 420 EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8)); 421 EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8)); 422 EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8)); 423 EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8)); 424 EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8)); 425 426 EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8)); 427 EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8)); 428 EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8)); 429 EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8)); 430 EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8)); 431 432 EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8)); 433 EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8)); 434 EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8)); 435 EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8)); 436 EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8)); 437 } 438 439 TEST(APIntTest, StringBitsNeeded10) { 440 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10)); 441 EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10)); 442 EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10)); 443 EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10)); 444 EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10)); 445 EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10)); 446 447 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10)); 448 EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10)); 449 EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10)); 450 EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10)); 451 EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10)); 452 453 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10)); 454 EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10)); 455 EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10)); 456 EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10)); 457 EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10)); 458 } 459 460 TEST(APIntTest, StringBitsNeeded16) { 461 EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16)); 462 EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16)); 463 EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16)); 464 EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16)); 465 EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16)); 466 467 EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16)); 468 EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16)); 469 EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16)); 470 EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16)); 471 EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16)); 472 473 EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16)); 474 EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16)); 475 EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16)); 476 EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16)); 477 EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16)); 478 } 479 480 TEST(APIntTest, toString) { 481 SmallString<16> S; 482 bool isSigned; 483 484 APInt(8, 0).toString(S, 2, true, true); 485 EXPECT_EQ(S.str().str(), "0b0"); 486 S.clear(); 487 APInt(8, 0).toString(S, 8, true, true); 488 EXPECT_EQ(S.str().str(), "00"); 489 S.clear(); 490 APInt(8, 0).toString(S, 10, true, true); 491 EXPECT_EQ(S.str().str(), "0"); 492 S.clear(); 493 APInt(8, 0).toString(S, 16, true, true); 494 EXPECT_EQ(S.str().str(), "0x0"); 495 S.clear(); 496 APInt(8, 0).toString(S, 36, true, false); 497 EXPECT_EQ(S.str().str(), "0"); 498 S.clear(); 499 500 isSigned = false; 501 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 502 EXPECT_EQ(S.str().str(), "0b11111111"); 503 S.clear(); 504 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 505 EXPECT_EQ(S.str().str(), "0377"); 506 S.clear(); 507 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 508 EXPECT_EQ(S.str().str(), "255"); 509 S.clear(); 510 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 511 EXPECT_EQ(S.str().str(), "0xFF"); 512 S.clear(); 513 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 514 EXPECT_EQ(S.str().str(), "73"); 515 S.clear(); 516 517 isSigned = true; 518 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 519 EXPECT_EQ(S.str().str(), "-0b1"); 520 S.clear(); 521 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 522 EXPECT_EQ(S.str().str(), "-01"); 523 S.clear(); 524 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 525 EXPECT_EQ(S.str().str(), "-1"); 526 S.clear(); 527 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 528 EXPECT_EQ(S.str().str(), "-0x1"); 529 S.clear(); 530 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 531 EXPECT_EQ(S.str().str(), "-1"); 532 S.clear(); 533 } 534 535 TEST(APIntTest, Log2) { 536 EXPECT_EQ(APInt(15, 7).logBase2(), 2U); 537 EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U); 538 EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1); 539 EXPECT_EQ(APInt(15, 8).logBase2(), 3U); 540 EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U); 541 EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3); 542 EXPECT_EQ(APInt(15, 9).logBase2(), 3U); 543 EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U); 544 EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1); 545 } 546 547 TEST(APIntTest, magic) { 548 EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16)); 549 EXPECT_EQ(APInt(32, 3).magic().s, 0U); 550 EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16)); 551 EXPECT_EQ(APInt(32, 5).magic().s, 1U); 552 EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16)); 553 EXPECT_EQ(APInt(32, 7).magic().s, 2U); 554 } 555 556 TEST(APIntTest, magicu) { 557 EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16)); 558 EXPECT_EQ(APInt(32, 3).magicu().s, 1U); 559 EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16)); 560 EXPECT_EQ(APInt(32, 5).magicu().s, 2U); 561 EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16)); 562 EXPECT_EQ(APInt(32, 7).magicu().s, 3U); 563 EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16)); 564 EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U); 565 } 566 567 #ifdef GTEST_HAS_DEATH_TEST 568 #ifndef NDEBUG 569 TEST(APIntTest, StringDeath) { 570 EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small"); 571 EXPECT_DEATH(APInt(32, "", 0), "Invalid string length"); 572 EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!"); 573 EXPECT_DEATH(APInt(32, "", 10), "Invalid string length"); 574 EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value."); 575 EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width"); 576 EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length"); 577 EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string"); 578 EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string"); 579 } 580 #endif 581 #endif 582 583 TEST(APIntTest, mul_clear) { 584 APInt ValA(65, -1ULL); 585 APInt ValB(65, 4); 586 APInt ValC(65, 0); 587 ValC = ValA * ValB; 588 ValA *= ValB; 589 EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false)); 590 } 591 592 TEST(APIntTest, Rotate) { 593 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(0)); 594 EXPECT_EQ(APInt(8, 2), APInt(8, 1).rotl(1)); 595 EXPECT_EQ(APInt(8, 4), APInt(8, 1).rotl(2)); 596 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4)); 597 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(8)); 598 599 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0)); 600 EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1)); 601 EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2)); 602 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotl(4)); 603 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8)); 604 605 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0)); 606 EXPECT_EQ(APInt(8, 8), APInt(8, 16).rotr(1)); 607 EXPECT_EQ(APInt(8, 4), APInt(8, 16).rotr(2)); 608 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotr(4)); 609 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8)); 610 611 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(0)); 612 EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1)); 613 EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2)); 614 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4)); 615 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8)); 616 617 APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16); 618 APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16); 619 EXPECT_EQ(Rot, Big.rotr(144)); 620 } 621 622 TEST(APIntTest, Splat) { 623 APInt ValA(8, 0x01); 624 EXPECT_EQ(ValA, APInt::getSplat(8, ValA)); 625 EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA)); 626 627 APInt ValB(3, 5); 628 EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB)); 629 EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB)); 630 } 631 632 TEST(APIntTest, tcDecrement) { 633 // Test single word decrement. 634 635 // No out borrow. 636 { 637 integerPart singleWord = ~integerPart(0) << (integerPartWidth - 1); 638 integerPart carry = APInt::tcDecrement(&singleWord, 1); 639 EXPECT_EQ(carry, integerPart(0)); 640 EXPECT_EQ(singleWord, ~integerPart(0) >> 1); 641 } 642 643 // With out borrow. 644 { 645 integerPart singleWord = 0; 646 integerPart carry = APInt::tcDecrement(&singleWord, 1); 647 EXPECT_EQ(carry, integerPart(1)); 648 EXPECT_EQ(singleWord, ~integerPart(0)); 649 } 650 651 // Test multiword decrement. 652 653 // No across word borrow, no out borrow. 654 { 655 integerPart test[4] = {0x1, 0x1, 0x1, 0x1}; 656 integerPart expected[4] = {0x0, 0x1, 0x1, 0x1}; 657 APInt::tcDecrement(test, 4); 658 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 659 } 660 661 // 1 across word borrow, no out borrow. 662 { 663 integerPart test[4] = {0x0, 0xF, 0x1, 0x1}; 664 integerPart expected[4] = {~integerPart(0), 0xE, 0x1, 0x1}; 665 integerPart carry = APInt::tcDecrement(test, 4); 666 EXPECT_EQ(carry, integerPart(0)); 667 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 668 } 669 670 // 2 across word borrow, no out borrow. 671 { 672 integerPart test[4] = {0x0, 0x0, 0xC, 0x1}; 673 integerPart expected[4] = {~integerPart(0), ~integerPart(0), 0xB, 0x1}; 674 integerPart carry = APInt::tcDecrement(test, 4); 675 EXPECT_EQ(carry, integerPart(0)); 676 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 677 } 678 679 // 3 across word borrow, no out borrow. 680 { 681 integerPart test[4] = {0x0, 0x0, 0x0, 0x1}; 682 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), 0x0}; 683 integerPart carry = APInt::tcDecrement(test, 4); 684 EXPECT_EQ(carry, integerPart(0)); 685 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 686 } 687 688 // 3 across word borrow, with out borrow. 689 { 690 integerPart test[4] = {0x0, 0x0, 0x0, 0x0}; 691 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), ~integerPart(0)}; 692 integerPart carry = APInt::tcDecrement(test, 4); 693 EXPECT_EQ(carry, integerPart(1)); 694 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 695 } 696 } 697 698 TEST(APIntTest, arrayAccess) { 699 // Single word check. 700 uint64_t E1 = 0x2CA7F46BF6569915ULL; 701 APInt A1(64, E1); 702 for (unsigned i = 0, e = 64; i < e; ++i) { 703 EXPECT_EQ(bool(E1 & (1ULL << i)), 704 A1[i]); 705 } 706 707 // Multiword check. 708 integerPart E2[4] = { 709 0xEB6EB136591CBA21ULL, 710 0x7B9358BD6A33F10AULL, 711 0x7E7FFA5EADD8846ULL, 712 0x305F341CA00B613DULL 713 }; 714 APInt A2(integerPartWidth*4, E2); 715 for (unsigned i = 0; i < 4; ++i) { 716 for (unsigned j = 0; j < integerPartWidth; ++j) { 717 EXPECT_EQ(bool(E2[i] & (1ULL << j)), 718 A2[i*integerPartWidth + j]); 719 } 720 } 721 } 722 723 TEST(APIntTest, LargeAPIntConstruction) { 724 // Check that we can properly construct very large APInt. It is very 725 // unlikely that people will ever do this, but it is a legal input, 726 // so we should not crash on it. 727 APInt A9(UINT32_MAX, 0); 728 EXPECT_FALSE(A9.getBoolValue()); 729 } 730 731 TEST(APIntTest, nearestLogBase2) { 732 // Single word check. 733 734 // Test round up. 735 uint64_t I1 = 0x1800001; 736 APInt A1(64, I1); 737 EXPECT_EQ(A1.nearestLogBase2(), A1.ceilLogBase2()); 738 739 // Test round down. 740 uint64_t I2 = 0x1000011; 741 APInt A2(64, I2); 742 EXPECT_EQ(A2.nearestLogBase2(), A2.logBase2()); 743 744 // Test ties round up. 745 uint64_t I3 = 0x1800000; 746 APInt A3(64, I3); 747 EXPECT_EQ(A3.nearestLogBase2(), A3.ceilLogBase2()); 748 749 // Multiple word check. 750 751 // Test round up. 752 integerPart I4[4] = {0x0, 0xF, 0x18, 0x0}; 753 APInt A4(integerPartWidth*4, I4); 754 EXPECT_EQ(A4.nearestLogBase2(), A4.ceilLogBase2()); 755 756 // Test round down. 757 integerPart I5[4] = {0x0, 0xF, 0x10, 0x0}; 758 APInt A5(integerPartWidth*4, I5); 759 EXPECT_EQ(A5.nearestLogBase2(), A5.logBase2()); 760 761 // Test ties round up. 762 uint64_t I6[4] = {0x0, 0x0, 0x0, 0x18}; 763 APInt A6(integerPartWidth*4, I6); 764 EXPECT_EQ(A6.nearestLogBase2(), A6.ceilLogBase2()); 765 766 // Test BitWidth == 1 special cases. 767 APInt A7(1, 1); 768 EXPECT_EQ(A7.nearestLogBase2(), 0ULL); 769 APInt A8(1, 0); 770 EXPECT_EQ(A8.nearestLogBase2(), UINT32_MAX); 771 772 // Test the zero case when we have a bit width large enough such 773 // that the bit width is larger than UINT32_MAX-1. 774 APInt A9(UINT32_MAX, 0); 775 EXPECT_EQ(A9.nearestLogBase2(), UINT32_MAX); 776 } 777 778 TEST(APIntTest, IsSplat) { 779 APInt A(32, 0x01010101); 780 EXPECT_FALSE(A.isSplat(1)); 781 EXPECT_FALSE(A.isSplat(2)); 782 EXPECT_FALSE(A.isSplat(4)); 783 EXPECT_TRUE(A.isSplat(8)); 784 EXPECT_TRUE(A.isSplat(16)); 785 EXPECT_TRUE(A.isSplat(32)); 786 787 APInt B(24, 0xAAAAAA); 788 EXPECT_FALSE(B.isSplat(1)); 789 EXPECT_TRUE(B.isSplat(2)); 790 EXPECT_TRUE(B.isSplat(4)); 791 EXPECT_TRUE(B.isSplat(8)); 792 EXPECT_TRUE(B.isSplat(24)); 793 794 APInt C(24, 0xABAAAB); 795 EXPECT_FALSE(C.isSplat(1)); 796 EXPECT_FALSE(C.isSplat(2)); 797 EXPECT_FALSE(C.isSplat(4)); 798 EXPECT_FALSE(C.isSplat(8)); 799 EXPECT_TRUE(C.isSplat(24)); 800 801 APInt D(32, 0xABBAABBA); 802 EXPECT_FALSE(D.isSplat(1)); 803 EXPECT_FALSE(D.isSplat(2)); 804 EXPECT_FALSE(D.isSplat(4)); 805 EXPECT_FALSE(D.isSplat(8)); 806 EXPECT_TRUE(D.isSplat(16)); 807 EXPECT_TRUE(D.isSplat(32)); 808 809 APInt E(32, 0); 810 EXPECT_TRUE(E.isSplat(1)); 811 EXPECT_TRUE(E.isSplat(2)); 812 EXPECT_TRUE(E.isSplat(4)); 813 EXPECT_TRUE(E.isSplat(8)); 814 EXPECT_TRUE(E.isSplat(16)); 815 EXPECT_TRUE(E.isSplat(32)); 816 } 817 818 #if defined(__clang__) 819 // Disable the pragma warning from versions of Clang without -Wself-move 820 #pragma clang diagnostic push 821 #pragma clang diagnostic ignored "-Wunknown-pragmas" 822 // Disable the warning that triggers on exactly what is being tested. 823 #pragma clang diagnostic push 824 #pragma clang diagnostic ignored "-Wself-move" 825 #endif 826 TEST(APIntTest, SelfMoveAssignment) { 827 APInt X(32, 0xdeadbeef); 828 X = std::move(X); 829 EXPECT_EQ(32u, X.getBitWidth()); 830 EXPECT_EQ(0xdeadbeefULL, X.getLimitedValue()); 831 832 uint64_t Bits[] = {0xdeadbeefdeadbeefULL, 0xdeadbeefdeadbeefULL}; 833 APInt Y(128, Bits); 834 Y = std::move(Y); 835 EXPECT_EQ(128u, Y.getBitWidth()); 836 EXPECT_EQ(~0ULL, Y.getLimitedValue()); 837 const uint64_t *Raw = Y.getRawData(); 838 EXPECT_EQ(2u, Y.getNumWords()); 839 EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[0]); 840 EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[1]); 841 } 842 #if defined(__clang__) 843 #pragma clang diagnostic pop 844 #pragma clang diagnostic pop 845 #endif 846 } 847