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 // Min/max signed values. 138 EXPECT_TRUE(zero.isMaxSignedValue()); 139 EXPECT_FALSE(one.isMaxSignedValue()); 140 EXPECT_FALSE(zero.isMinSignedValue()); 141 EXPECT_TRUE(one.isMinSignedValue()); 142 143 // Additions. 144 EXPECT_EQ(two, one + one); 145 EXPECT_EQ(zero, neg_one + one); 146 EXPECT_EQ(neg_two, neg_one + neg_one); 147 148 // Subtractions. 149 EXPECT_EQ(neg_two, neg_one - one); 150 EXPECT_EQ(two, one - neg_one); 151 EXPECT_EQ(zero, one - one); 152 153 // Shifts. 154 EXPECT_EQ(zero, one << one); 155 EXPECT_EQ(one, one << zero); 156 EXPECT_EQ(zero, one.shl(1)); 157 EXPECT_EQ(one, one.shl(0)); 158 EXPECT_EQ(zero, one.lshr(1)); 159 EXPECT_EQ(zero, one.ashr(1)); 160 161 // Rotates. 162 EXPECT_EQ(one, one.rotl(0)); 163 EXPECT_EQ(one, one.rotl(1)); 164 EXPECT_EQ(one, one.rotr(0)); 165 EXPECT_EQ(one, one.rotr(1)); 166 167 // Multiplies. 168 EXPECT_EQ(neg_one, neg_one * one); 169 EXPECT_EQ(neg_one, one * neg_one); 170 EXPECT_EQ(one, neg_one * neg_one); 171 EXPECT_EQ(one, one * one); 172 173 // Divides. 174 EXPECT_EQ(neg_one, one.sdiv(neg_one)); 175 EXPECT_EQ(neg_one, neg_one.sdiv(one)); 176 EXPECT_EQ(one, neg_one.sdiv(neg_one)); 177 EXPECT_EQ(one, one.sdiv(one)); 178 179 EXPECT_EQ(neg_one, one.udiv(neg_one)); 180 EXPECT_EQ(neg_one, neg_one.udiv(one)); 181 EXPECT_EQ(one, neg_one.udiv(neg_one)); 182 EXPECT_EQ(one, one.udiv(one)); 183 184 // Remainders. 185 EXPECT_EQ(zero, neg_one.srem(one)); 186 EXPECT_EQ(zero, neg_one.urem(one)); 187 EXPECT_EQ(zero, one.srem(neg_one)); 188 189 // sdivrem 190 { 191 APInt q(8, 0); 192 APInt r(8, 0); 193 APInt one(8, 1); 194 APInt two(8, 2); 195 APInt nine(8, 9); 196 APInt four(8, 4); 197 198 EXPECT_EQ(nine.srem(two), one); 199 EXPECT_EQ(nine.srem(-two), one); 200 EXPECT_EQ((-nine).srem(two), -one); 201 EXPECT_EQ((-nine).srem(-two), -one); 202 203 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 APInt::sdivrem(nine, -two, q, r); 210 EXPECT_EQ(-four, q); 211 EXPECT_EQ(one, r); 212 APInt::sdivrem(-nine, -two, q, r); 213 EXPECT_EQ(four, q); 214 EXPECT_EQ(-one, r); 215 } 216 } 217 218 219 // Tests different div/rem varaints using scheme (a * b + c) / a 220 void testDiv(APInt a, APInt b, APInt c) { 221 ASSERT_TRUE(a.uge(b)); // Must: a >= b 222 ASSERT_TRUE(a.ugt(c)); // Must: a > c 223 224 auto p = a * b + c; 225 226 auto q = p.udiv(a); 227 auto r = p.urem(a); 228 EXPECT_EQ(b, q); 229 EXPECT_EQ(c, r); 230 APInt::udivrem(p, a, q, r); 231 EXPECT_EQ(b, q); 232 EXPECT_EQ(c, r); 233 q = p.sdiv(a); 234 r = p.srem(a); 235 EXPECT_EQ(b, q); 236 EXPECT_EQ(c, r); 237 APInt::sdivrem(p, a, q, r); 238 EXPECT_EQ(b, q); 239 EXPECT_EQ(c, r); 240 241 if (b.ugt(c)) { // Test also symmetric case 242 q = p.udiv(b); 243 r = p.urem(b); 244 EXPECT_EQ(a, q); 245 EXPECT_EQ(c, r); 246 APInt::udivrem(p, b, q, r); 247 EXPECT_EQ(a, q); 248 EXPECT_EQ(c, r); 249 q = p.sdiv(b); 250 r = p.srem(b); 251 EXPECT_EQ(a, q); 252 EXPECT_EQ(c, r); 253 APInt::sdivrem(p, b, q, r); 254 EXPECT_EQ(a, q); 255 EXPECT_EQ(c, r); 256 } 257 } 258 259 TEST(APIntTest, divrem_big1) { 260 // Tests KnuthDiv rare step D6 261 testDiv({256, "1ffffffffffffffff", 16}, 262 {256, "1ffffffffffffffff", 16}, 263 {256, 0}); 264 } 265 266 TEST(APIntTest, divrem_big2) { 267 // Tests KnuthDiv rare step D6 268 testDiv({1024, "112233ceff" 269 "cecece000000ffffffffffffffffffff" 270 "ffffffffffffffffffffffffffffffff" 271 "ffffffffffffffffffffffffffffffff" 272 "ffffffffffffffffffffffffffffff33", 16}, 273 {1024, "111111ffffffffffffffff" 274 "ffffffffffffffffffffffffffffffff" 275 "fffffffffffffffffffffffffffffccf" 276 "ffffffffffffffffffffffffffffff00", 16}, 277 {1024, 7919}); 278 } 279 280 TEST(APIntTest, divrem_big3) { 281 // Tests KnuthDiv case without shift 282 testDiv({256, "80000001ffffffffffffffff", 16}, 283 {256, "ffffffffffffff0000000", 16}, 284 {256, 4219}); 285 } 286 287 TEST(APIntTest, divrem_big4) { 288 // Tests heap allocation in divide() enfoced by huge numbers 289 testDiv(APInt{4096, 5}.shl(2001), 290 APInt{4096, 1}.shl(2000), 291 APInt{4096, 4219*13}); 292 } 293 294 TEST(APIntTest, divrem_big5) { 295 // Tests one word divisor case of divide() 296 testDiv(APInt{1024, 19}.shl(811), 297 APInt{1024, 4356013}, // one word 298 APInt{1024, 1}); 299 } 300 301 TEST(APIntTest, divrem_big6) { 302 // Tests some rare "borrow" cases in D4 step 303 testDiv(APInt{512, "ffffffffffffffff00000000000000000000000001", 16}, 304 APInt{512, "10000000000000001000000000000001", 16}, 305 APInt{512, "10000000000000000000000000000000", 16}); 306 } 307 308 TEST(APIntTest, divrem_big7) { 309 // Yet another test for KnuthDiv rare step D6. 310 testDiv({224, "800000008000000200000005", 16}, 311 {224, "fffffffd", 16}, 312 {224, "80000000800000010000000f", 16}); 313 } 314 315 TEST(APIntTest, fromString) { 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, 0), APInt(32, "+0", 2)); 323 EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2)); 324 EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2)); 325 EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2)); 326 EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2)); 327 328 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 2)); 329 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 2)); 330 EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32, "-10", 2)); 331 EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32, "-11", 2)); 332 EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2)); 333 334 335 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8)); 336 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8)); 337 EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8)); 338 EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8)); 339 EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8)); 340 EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8)); 341 342 EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8)); 343 EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8)); 344 EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8)); 345 EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8)); 346 EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8)); 347 EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8)); 348 349 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 8)); 350 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 8)); 351 EXPECT_EQ(APInt(32, uint64_t(-7LL)), APInt(32, "-7", 8)); 352 EXPECT_EQ(APInt(32, uint64_t(-8LL)), APInt(32, "-10", 8)); 353 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-17", 8)); 354 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-20", 8)); 355 356 357 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10)); 358 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10)); 359 EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10)); 360 EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10)); 361 EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10)); 362 EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10)); 363 364 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 10)); 365 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 10)); 366 EXPECT_EQ(APInt(32, uint64_t(-9LL)), APInt(32, "-9", 10)); 367 EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10)); 368 EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10)); 369 EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10)); 370 371 372 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16)); 373 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16)); 374 EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16)); 375 EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16)); 376 EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16)); 377 EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16)); 378 379 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 16)); 380 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 16)); 381 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-F", 16)); 382 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16)); 383 EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16)); 384 EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16)); 385 386 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 36)); 387 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 36)); 388 EXPECT_EQ(APInt(32, 35), APInt(32, "Z", 36)); 389 EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36)); 390 EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36)); 391 EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36)); 392 393 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 36)); 394 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 36)); 395 EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32, "-Z", 36)); 396 EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36)); 397 EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36)); 398 EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36)); 399 } 400 401 TEST(APIntTest, FromArray) { 402 EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1))); 403 } 404 405 TEST(APIntTest, StringBitsNeeded2) { 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(1U, APInt::getBitsNeeded( "+0", 2)); 413 EXPECT_EQ(1U, APInt::getBitsNeeded( "+1", 2)); 414 EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2)); 415 EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2)); 416 EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2)); 417 418 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 2)); 419 EXPECT_EQ(2U, APInt::getBitsNeeded( "-1", 2)); 420 EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2)); 421 EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2)); 422 EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2)); 423 } 424 425 TEST(APIntTest, StringBitsNeeded8) { 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(3U, APInt::getBitsNeeded( "+0", 8)); 433 EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8)); 434 EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8)); 435 EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8)); 436 EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8)); 437 438 EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8)); 439 EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8)); 440 EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8)); 441 EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8)); 442 EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8)); 443 } 444 445 TEST(APIntTest, StringBitsNeeded10) { 446 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10)); 447 EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 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(1U, APInt::getBitsNeeded( "+0", 10)); 454 EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10)); 455 EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10)); 456 EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10)); 457 EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10)); 458 459 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10)); 460 EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10)); 461 EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10)); 462 EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10)); 463 EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10)); 464 } 465 466 TEST(APIntTest, StringBitsNeeded16) { 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(4U, APInt::getBitsNeeded( "+0", 16)); 474 EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16)); 475 EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16)); 476 EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16)); 477 EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16)); 478 479 EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16)); 480 EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16)); 481 EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16)); 482 EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16)); 483 EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16)); 484 } 485 486 TEST(APIntTest, toString) { 487 SmallString<16> S; 488 bool isSigned; 489 490 APInt(8, 0).toString(S, 2, true, true); 491 EXPECT_EQ(S.str().str(), "0b0"); 492 S.clear(); 493 APInt(8, 0).toString(S, 8, true, true); 494 EXPECT_EQ(S.str().str(), "00"); 495 S.clear(); 496 APInt(8, 0).toString(S, 10, true, true); 497 EXPECT_EQ(S.str().str(), "0"); 498 S.clear(); 499 APInt(8, 0).toString(S, 16, true, true); 500 EXPECT_EQ(S.str().str(), "0x0"); 501 S.clear(); 502 APInt(8, 0).toString(S, 36, true, false); 503 EXPECT_EQ(S.str().str(), "0"); 504 S.clear(); 505 506 isSigned = false; 507 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 508 EXPECT_EQ(S.str().str(), "0b11111111"); 509 S.clear(); 510 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 511 EXPECT_EQ(S.str().str(), "0377"); 512 S.clear(); 513 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 514 EXPECT_EQ(S.str().str(), "255"); 515 S.clear(); 516 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 517 EXPECT_EQ(S.str().str(), "0xFF"); 518 S.clear(); 519 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 520 EXPECT_EQ(S.str().str(), "73"); 521 S.clear(); 522 523 isSigned = true; 524 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 525 EXPECT_EQ(S.str().str(), "-0b1"); 526 S.clear(); 527 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 528 EXPECT_EQ(S.str().str(), "-01"); 529 S.clear(); 530 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 531 EXPECT_EQ(S.str().str(), "-1"); 532 S.clear(); 533 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 534 EXPECT_EQ(S.str().str(), "-0x1"); 535 S.clear(); 536 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 537 EXPECT_EQ(S.str().str(), "-1"); 538 S.clear(); 539 } 540 541 TEST(APIntTest, Log2) { 542 EXPECT_EQ(APInt(15, 7).logBase2(), 2U); 543 EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U); 544 EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1); 545 EXPECT_EQ(APInt(15, 8).logBase2(), 3U); 546 EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U); 547 EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3); 548 EXPECT_EQ(APInt(15, 9).logBase2(), 3U); 549 EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U); 550 EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1); 551 } 552 553 TEST(APIntTest, magic) { 554 EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16)); 555 EXPECT_EQ(APInt(32, 3).magic().s, 0U); 556 EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16)); 557 EXPECT_EQ(APInt(32, 5).magic().s, 1U); 558 EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16)); 559 EXPECT_EQ(APInt(32, 7).magic().s, 2U); 560 } 561 562 TEST(APIntTest, magicu) { 563 EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16)); 564 EXPECT_EQ(APInt(32, 3).magicu().s, 1U); 565 EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16)); 566 EXPECT_EQ(APInt(32, 5).magicu().s, 2U); 567 EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16)); 568 EXPECT_EQ(APInt(32, 7).magicu().s, 3U); 569 EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16)); 570 EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U); 571 } 572 573 #ifdef GTEST_HAS_DEATH_TEST 574 #ifndef NDEBUG 575 TEST(APIntTest, StringDeath) { 576 EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small"); 577 EXPECT_DEATH(APInt(32, "", 0), "Invalid string length"); 578 EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!"); 579 EXPECT_DEATH(APInt(32, "", 10), "Invalid string length"); 580 EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value."); 581 EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width"); 582 EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length"); 583 EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string"); 584 EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string"); 585 } 586 #endif 587 #endif 588 589 TEST(APIntTest, mul_clear) { 590 APInt ValA(65, -1ULL); 591 APInt ValB(65, 4); 592 APInt ValC(65, 0); 593 ValC = ValA * ValB; 594 ValA *= ValB; 595 EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false)); 596 } 597 598 TEST(APIntTest, Rotate) { 599 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(0)); 600 EXPECT_EQ(APInt(8, 2), APInt(8, 1).rotl(1)); 601 EXPECT_EQ(APInt(8, 4), APInt(8, 1).rotl(2)); 602 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4)); 603 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(8)); 604 605 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0)); 606 EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1)); 607 EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2)); 608 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotl(4)); 609 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8)); 610 611 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0)); 612 EXPECT_EQ(APInt(8, 8), APInt(8, 16).rotr(1)); 613 EXPECT_EQ(APInt(8, 4), APInt(8, 16).rotr(2)); 614 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotr(4)); 615 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8)); 616 617 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(0)); 618 EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1)); 619 EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2)); 620 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4)); 621 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8)); 622 623 APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16); 624 APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16); 625 EXPECT_EQ(Rot, Big.rotr(144)); 626 } 627 628 TEST(APIntTest, Splat) { 629 APInt ValA(8, 0x01); 630 EXPECT_EQ(ValA, APInt::getSplat(8, ValA)); 631 EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA)); 632 633 APInt ValB(3, 5); 634 EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB)); 635 EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB)); 636 } 637 638 TEST(APIntTest, tcDecrement) { 639 // Test single word decrement. 640 641 // No out borrow. 642 { 643 integerPart singleWord = ~integerPart(0) << (integerPartWidth - 1); 644 integerPart carry = APInt::tcDecrement(&singleWord, 1); 645 EXPECT_EQ(carry, integerPart(0)); 646 EXPECT_EQ(singleWord, ~integerPart(0) >> 1); 647 } 648 649 // With out borrow. 650 { 651 integerPart singleWord = 0; 652 integerPart carry = APInt::tcDecrement(&singleWord, 1); 653 EXPECT_EQ(carry, integerPart(1)); 654 EXPECT_EQ(singleWord, ~integerPart(0)); 655 } 656 657 // Test multiword decrement. 658 659 // No across word borrow, no out borrow. 660 { 661 integerPart test[4] = {0x1, 0x1, 0x1, 0x1}; 662 integerPart expected[4] = {0x0, 0x1, 0x1, 0x1}; 663 APInt::tcDecrement(test, 4); 664 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 665 } 666 667 // 1 across word borrow, no out borrow. 668 { 669 integerPart test[4] = {0x0, 0xF, 0x1, 0x1}; 670 integerPart expected[4] = {~integerPart(0), 0xE, 0x1, 0x1}; 671 integerPart carry = APInt::tcDecrement(test, 4); 672 EXPECT_EQ(carry, integerPart(0)); 673 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 674 } 675 676 // 2 across word borrow, no out borrow. 677 { 678 integerPart test[4] = {0x0, 0x0, 0xC, 0x1}; 679 integerPart expected[4] = {~integerPart(0), ~integerPart(0), 0xB, 0x1}; 680 integerPart carry = APInt::tcDecrement(test, 4); 681 EXPECT_EQ(carry, integerPart(0)); 682 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 683 } 684 685 // 3 across word borrow, no out borrow. 686 { 687 integerPart test[4] = {0x0, 0x0, 0x0, 0x1}; 688 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), 0x0}; 689 integerPart carry = APInt::tcDecrement(test, 4); 690 EXPECT_EQ(carry, integerPart(0)); 691 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 692 } 693 694 // 3 across word borrow, with out borrow. 695 { 696 integerPart test[4] = {0x0, 0x0, 0x0, 0x0}; 697 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), ~integerPart(0)}; 698 integerPart carry = APInt::tcDecrement(test, 4); 699 EXPECT_EQ(carry, integerPart(1)); 700 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 701 } 702 } 703 704 TEST(APIntTest, arrayAccess) { 705 // Single word check. 706 uint64_t E1 = 0x2CA7F46BF6569915ULL; 707 APInt A1(64, E1); 708 for (unsigned i = 0, e = 64; i < e; ++i) { 709 EXPECT_EQ(bool(E1 & (1ULL << i)), 710 A1[i]); 711 } 712 713 // Multiword check. 714 integerPart E2[4] = { 715 0xEB6EB136591CBA21ULL, 716 0x7B9358BD6A33F10AULL, 717 0x7E7FFA5EADD8846ULL, 718 0x305F341CA00B613DULL 719 }; 720 APInt A2(integerPartWidth*4, E2); 721 for (unsigned i = 0; i < 4; ++i) { 722 for (unsigned j = 0; j < integerPartWidth; ++j) { 723 EXPECT_EQ(bool(E2[i] & (1ULL << j)), 724 A2[i*integerPartWidth + j]); 725 } 726 } 727 } 728 729 TEST(APIntTest, LargeAPIntConstruction) { 730 // Check that we can properly construct very large APInt. It is very 731 // unlikely that people will ever do this, but it is a legal input, 732 // so we should not crash on it. 733 APInt A9(UINT32_MAX, 0); 734 EXPECT_FALSE(A9.getBoolValue()); 735 } 736 737 TEST(APIntTest, nearestLogBase2) { 738 // Single word check. 739 740 // Test round up. 741 uint64_t I1 = 0x1800001; 742 APInt A1(64, I1); 743 EXPECT_EQ(A1.nearestLogBase2(), A1.ceilLogBase2()); 744 745 // Test round down. 746 uint64_t I2 = 0x1000011; 747 APInt A2(64, I2); 748 EXPECT_EQ(A2.nearestLogBase2(), A2.logBase2()); 749 750 // Test ties round up. 751 uint64_t I3 = 0x1800000; 752 APInt A3(64, I3); 753 EXPECT_EQ(A3.nearestLogBase2(), A3.ceilLogBase2()); 754 755 // Multiple word check. 756 757 // Test round up. 758 integerPart I4[4] = {0x0, 0xF, 0x18, 0x0}; 759 APInt A4(integerPartWidth*4, I4); 760 EXPECT_EQ(A4.nearestLogBase2(), A4.ceilLogBase2()); 761 762 // Test round down. 763 integerPart I5[4] = {0x0, 0xF, 0x10, 0x0}; 764 APInt A5(integerPartWidth*4, I5); 765 EXPECT_EQ(A5.nearestLogBase2(), A5.logBase2()); 766 767 // Test ties round up. 768 uint64_t I6[4] = {0x0, 0x0, 0x0, 0x18}; 769 APInt A6(integerPartWidth*4, I6); 770 EXPECT_EQ(A6.nearestLogBase2(), A6.ceilLogBase2()); 771 772 // Test BitWidth == 1 special cases. 773 APInt A7(1, 1); 774 EXPECT_EQ(A7.nearestLogBase2(), 0ULL); 775 APInt A8(1, 0); 776 EXPECT_EQ(A8.nearestLogBase2(), UINT32_MAX); 777 778 // Test the zero case when we have a bit width large enough such 779 // that the bit width is larger than UINT32_MAX-1. 780 APInt A9(UINT32_MAX, 0); 781 EXPECT_EQ(A9.nearestLogBase2(), UINT32_MAX); 782 } 783 784 TEST(APIntTest, IsSplat) { 785 APInt A(32, 0x01010101); 786 EXPECT_FALSE(A.isSplat(1)); 787 EXPECT_FALSE(A.isSplat(2)); 788 EXPECT_FALSE(A.isSplat(4)); 789 EXPECT_TRUE(A.isSplat(8)); 790 EXPECT_TRUE(A.isSplat(16)); 791 EXPECT_TRUE(A.isSplat(32)); 792 793 APInt B(24, 0xAAAAAA); 794 EXPECT_FALSE(B.isSplat(1)); 795 EXPECT_TRUE(B.isSplat(2)); 796 EXPECT_TRUE(B.isSplat(4)); 797 EXPECT_TRUE(B.isSplat(8)); 798 EXPECT_TRUE(B.isSplat(24)); 799 800 APInt C(24, 0xABAAAB); 801 EXPECT_FALSE(C.isSplat(1)); 802 EXPECT_FALSE(C.isSplat(2)); 803 EXPECT_FALSE(C.isSplat(4)); 804 EXPECT_FALSE(C.isSplat(8)); 805 EXPECT_TRUE(C.isSplat(24)); 806 807 APInt D(32, 0xABBAABBA); 808 EXPECT_FALSE(D.isSplat(1)); 809 EXPECT_FALSE(D.isSplat(2)); 810 EXPECT_FALSE(D.isSplat(4)); 811 EXPECT_FALSE(D.isSplat(8)); 812 EXPECT_TRUE(D.isSplat(16)); 813 EXPECT_TRUE(D.isSplat(32)); 814 815 APInt E(32, 0); 816 EXPECT_TRUE(E.isSplat(1)); 817 EXPECT_TRUE(E.isSplat(2)); 818 EXPECT_TRUE(E.isSplat(4)); 819 EXPECT_TRUE(E.isSplat(8)); 820 EXPECT_TRUE(E.isSplat(16)); 821 EXPECT_TRUE(E.isSplat(32)); 822 } 823 824 #if defined(__clang__) 825 // Disable the pragma warning from versions of Clang without -Wself-move 826 #pragma clang diagnostic push 827 #pragma clang diagnostic ignored "-Wunknown-pragmas" 828 // Disable the warning that triggers on exactly what is being tested. 829 #pragma clang diagnostic push 830 #pragma clang diagnostic ignored "-Wself-move" 831 #endif 832 TEST(APIntTest, SelfMoveAssignment) { 833 APInt X(32, 0xdeadbeef); 834 X = std::move(X); 835 EXPECT_EQ(32u, X.getBitWidth()); 836 EXPECT_EQ(0xdeadbeefULL, X.getLimitedValue()); 837 838 uint64_t Bits[] = {0xdeadbeefdeadbeefULL, 0xdeadbeefdeadbeefULL}; 839 APInt Y(128, Bits); 840 Y = std::move(Y); 841 EXPECT_EQ(128u, Y.getBitWidth()); 842 EXPECT_EQ(~0ULL, Y.getLimitedValue()); 843 const uint64_t *Raw = Y.getRawData(); 844 EXPECT_EQ(2u, Y.getNumWords()); 845 EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[0]); 846 EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[1]); 847 } 848 #if defined(__clang__) 849 #pragma clang diagnostic pop 850 #pragma clang diagnostic pop 851 #endif 852 } 853