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 TEST(APIntTest, compare) { 219 std::array<APInt, 5> testVals{{ 220 APInt{16, 2}, 221 APInt{16, 1}, 222 APInt{16, 0}, 223 APInt{16, (uint64_t)-1, true}, 224 APInt{16, (uint64_t)-2, true}, 225 }}; 226 227 for (auto &arg1 : testVals) 228 for (auto &arg2 : testVals) { 229 auto uv1 = arg1.getZExtValue(); 230 auto uv2 = arg2.getZExtValue(); 231 auto sv1 = arg1.getSExtValue(); 232 auto sv2 = arg2.getSExtValue(); 233 234 EXPECT_EQ(uv1 < uv2, arg1.ult(arg2)); 235 EXPECT_EQ(uv1 <= uv2, arg1.ule(arg2)); 236 EXPECT_EQ(uv1 > uv2, arg1.ugt(arg2)); 237 EXPECT_EQ(uv1 >= uv2, arg1.uge(arg2)); 238 239 EXPECT_EQ(sv1 < sv2, arg1.slt(arg2)); 240 EXPECT_EQ(sv1 <= sv2, arg1.sle(arg2)); 241 EXPECT_EQ(sv1 > sv2, arg1.sgt(arg2)); 242 EXPECT_EQ(sv1 >= sv2, arg1.sge(arg2)); 243 244 EXPECT_EQ(uv1 < uv2, arg1.ult(uv2)); 245 EXPECT_EQ(uv1 <= uv2, arg1.ule(uv2)); 246 EXPECT_EQ(uv1 > uv2, arg1.ugt(uv2)); 247 EXPECT_EQ(uv1 >= uv2, arg1.uge(uv2)); 248 249 EXPECT_EQ(sv1 < sv2, arg1.slt(sv2)); 250 EXPECT_EQ(sv1 <= sv2, arg1.sle(sv2)); 251 EXPECT_EQ(sv1 > sv2, arg1.sgt(sv2)); 252 EXPECT_EQ(sv1 >= sv2, arg1.sge(sv2)); 253 } 254 } 255 256 257 // Tests different div/rem varaints using scheme (a * b + c) / a 258 void testDiv(APInt a, APInt b, APInt c) { 259 ASSERT_TRUE(a.uge(b)); // Must: a >= b 260 ASSERT_TRUE(a.ugt(c)); // Must: a > c 261 262 auto p = a * b + c; 263 264 auto q = p.udiv(a); 265 auto r = p.urem(a); 266 EXPECT_EQ(b, q); 267 EXPECT_EQ(c, r); 268 APInt::udivrem(p, a, q, r); 269 EXPECT_EQ(b, q); 270 EXPECT_EQ(c, r); 271 q = p.sdiv(a); 272 r = p.srem(a); 273 EXPECT_EQ(b, q); 274 EXPECT_EQ(c, r); 275 APInt::sdivrem(p, a, q, r); 276 EXPECT_EQ(b, q); 277 EXPECT_EQ(c, r); 278 279 if (b.ugt(c)) { // Test also symmetric case 280 q = p.udiv(b); 281 r = p.urem(b); 282 EXPECT_EQ(a, q); 283 EXPECT_EQ(c, r); 284 APInt::udivrem(p, b, q, r); 285 EXPECT_EQ(a, q); 286 EXPECT_EQ(c, r); 287 q = p.sdiv(b); 288 r = p.srem(b); 289 EXPECT_EQ(a, q); 290 EXPECT_EQ(c, r); 291 APInt::sdivrem(p, b, q, r); 292 EXPECT_EQ(a, q); 293 EXPECT_EQ(c, r); 294 } 295 } 296 297 TEST(APIntTest, divrem_big1) { 298 // Tests KnuthDiv rare step D6 299 testDiv({256, "1ffffffffffffffff", 16}, 300 {256, "1ffffffffffffffff", 16}, 301 {256, 0}); 302 } 303 304 TEST(APIntTest, divrem_big2) { 305 // Tests KnuthDiv rare step D6 306 testDiv({1024, "112233ceff" 307 "cecece000000ffffffffffffffffffff" 308 "ffffffffffffffffffffffffffffffff" 309 "ffffffffffffffffffffffffffffffff" 310 "ffffffffffffffffffffffffffffff33", 16}, 311 {1024, "111111ffffffffffffffff" 312 "ffffffffffffffffffffffffffffffff" 313 "fffffffffffffffffffffffffffffccf" 314 "ffffffffffffffffffffffffffffff00", 16}, 315 {1024, 7919}); 316 } 317 318 TEST(APIntTest, divrem_big3) { 319 // Tests KnuthDiv case without shift 320 testDiv({256, "80000001ffffffffffffffff", 16}, 321 {256, "ffffffffffffff0000000", 16}, 322 {256, 4219}); 323 } 324 325 TEST(APIntTest, divrem_big4) { 326 // Tests heap allocation in divide() enfoced by huge numbers 327 testDiv(APInt{4096, 5}.shl(2001), 328 APInt{4096, 1}.shl(2000), 329 APInt{4096, 4219*13}); 330 } 331 332 TEST(APIntTest, divrem_big5) { 333 // Tests one word divisor case of divide() 334 testDiv(APInt{1024, 19}.shl(811), 335 APInt{1024, 4356013}, // one word 336 APInt{1024, 1}); 337 } 338 339 TEST(APIntTest, divrem_big6) { 340 // Tests some rare "borrow" cases in D4 step 341 testDiv(APInt{512, "ffffffffffffffff00000000000000000000000001", 16}, 342 APInt{512, "10000000000000001000000000000001", 16}, 343 APInt{512, "10000000000000000000000000000000", 16}); 344 } 345 346 TEST(APIntTest, divrem_big7) { 347 // Yet another test for KnuthDiv rare step D6. 348 testDiv({224, "800000008000000200000005", 16}, 349 {224, "fffffffd", 16}, 350 {224, "80000000800000010000000f", 16}); 351 } 352 353 TEST(APIntTest, fromString) { 354 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2)); 355 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2)); 356 EXPECT_EQ(APInt(32, 2), APInt(32, "10", 2)); 357 EXPECT_EQ(APInt(32, 3), APInt(32, "11", 2)); 358 EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2)); 359 360 EXPECT_EQ(APInt(32, 0), APInt(32, "+0", 2)); 361 EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2)); 362 EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2)); 363 EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2)); 364 EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2)); 365 366 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 2)); 367 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 2)); 368 EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32, "-10", 2)); 369 EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32, "-11", 2)); 370 EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2)); 371 372 373 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8)); 374 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8)); 375 EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8)); 376 EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8)); 377 EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8)); 378 EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8)); 379 380 EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8)); 381 EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8)); 382 EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8)); 383 EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8)); 384 EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8)); 385 EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8)); 386 387 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 8)); 388 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 8)); 389 EXPECT_EQ(APInt(32, uint64_t(-7LL)), APInt(32, "-7", 8)); 390 EXPECT_EQ(APInt(32, uint64_t(-8LL)), APInt(32, "-10", 8)); 391 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-17", 8)); 392 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-20", 8)); 393 394 395 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10)); 396 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10)); 397 EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10)); 398 EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10)); 399 EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10)); 400 EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10)); 401 402 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 10)); 403 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 10)); 404 EXPECT_EQ(APInt(32, uint64_t(-9LL)), APInt(32, "-9", 10)); 405 EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10)); 406 EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10)); 407 EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10)); 408 409 410 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16)); 411 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16)); 412 EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16)); 413 EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16)); 414 EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16)); 415 EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16)); 416 417 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 16)); 418 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 16)); 419 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-F", 16)); 420 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16)); 421 EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16)); 422 EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16)); 423 424 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 36)); 425 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 36)); 426 EXPECT_EQ(APInt(32, 35), APInt(32, "Z", 36)); 427 EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36)); 428 EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36)); 429 EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36)); 430 431 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 36)); 432 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 36)); 433 EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32, "-Z", 36)); 434 EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36)); 435 EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36)); 436 EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36)); 437 } 438 439 TEST(APIntTest, FromArray) { 440 EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1))); 441 } 442 443 TEST(APIntTest, StringBitsNeeded2) { 444 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 2)); 445 EXPECT_EQ(1U, APInt::getBitsNeeded( "1", 2)); 446 EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2)); 447 EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2)); 448 EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2)); 449 450 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 2)); 451 EXPECT_EQ(1U, APInt::getBitsNeeded( "+1", 2)); 452 EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2)); 453 EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2)); 454 EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2)); 455 456 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 2)); 457 EXPECT_EQ(2U, APInt::getBitsNeeded( "-1", 2)); 458 EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2)); 459 EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2)); 460 EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2)); 461 } 462 463 TEST(APIntTest, StringBitsNeeded8) { 464 EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8)); 465 EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8)); 466 EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8)); 467 EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8)); 468 EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8)); 469 470 EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8)); 471 EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8)); 472 EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8)); 473 EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8)); 474 EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8)); 475 476 EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8)); 477 EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8)); 478 EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8)); 479 EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8)); 480 EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8)); 481 } 482 483 TEST(APIntTest, StringBitsNeeded10) { 484 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10)); 485 EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10)); 486 EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10)); 487 EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10)); 488 EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10)); 489 EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10)); 490 491 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10)); 492 EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10)); 493 EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10)); 494 EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10)); 495 EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10)); 496 497 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10)); 498 EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10)); 499 EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10)); 500 EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10)); 501 EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10)); 502 } 503 504 TEST(APIntTest, StringBitsNeeded16) { 505 EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16)); 506 EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16)); 507 EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16)); 508 EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16)); 509 EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16)); 510 511 EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16)); 512 EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16)); 513 EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16)); 514 EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16)); 515 EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16)); 516 517 EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16)); 518 EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16)); 519 EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16)); 520 EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16)); 521 EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16)); 522 } 523 524 TEST(APIntTest, toString) { 525 SmallString<16> S; 526 bool isSigned; 527 528 APInt(8, 0).toString(S, 2, true, true); 529 EXPECT_EQ(S.str().str(), "0b0"); 530 S.clear(); 531 APInt(8, 0).toString(S, 8, true, true); 532 EXPECT_EQ(S.str().str(), "00"); 533 S.clear(); 534 APInt(8, 0).toString(S, 10, true, true); 535 EXPECT_EQ(S.str().str(), "0"); 536 S.clear(); 537 APInt(8, 0).toString(S, 16, true, true); 538 EXPECT_EQ(S.str().str(), "0x0"); 539 S.clear(); 540 APInt(8, 0).toString(S, 36, true, false); 541 EXPECT_EQ(S.str().str(), "0"); 542 S.clear(); 543 544 isSigned = false; 545 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 546 EXPECT_EQ(S.str().str(), "0b11111111"); 547 S.clear(); 548 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 549 EXPECT_EQ(S.str().str(), "0377"); 550 S.clear(); 551 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 552 EXPECT_EQ(S.str().str(), "255"); 553 S.clear(); 554 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 555 EXPECT_EQ(S.str().str(), "0xFF"); 556 S.clear(); 557 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 558 EXPECT_EQ(S.str().str(), "73"); 559 S.clear(); 560 561 isSigned = true; 562 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 563 EXPECT_EQ(S.str().str(), "-0b1"); 564 S.clear(); 565 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 566 EXPECT_EQ(S.str().str(), "-01"); 567 S.clear(); 568 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 569 EXPECT_EQ(S.str().str(), "-1"); 570 S.clear(); 571 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 572 EXPECT_EQ(S.str().str(), "-0x1"); 573 S.clear(); 574 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 575 EXPECT_EQ(S.str().str(), "-1"); 576 S.clear(); 577 } 578 579 TEST(APIntTest, Log2) { 580 EXPECT_EQ(APInt(15, 7).logBase2(), 2U); 581 EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U); 582 EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1); 583 EXPECT_EQ(APInt(15, 8).logBase2(), 3U); 584 EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U); 585 EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3); 586 EXPECT_EQ(APInt(15, 9).logBase2(), 3U); 587 EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U); 588 EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1); 589 } 590 591 TEST(APIntTest, magic) { 592 EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16)); 593 EXPECT_EQ(APInt(32, 3).magic().s, 0U); 594 EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16)); 595 EXPECT_EQ(APInt(32, 5).magic().s, 1U); 596 EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16)); 597 EXPECT_EQ(APInt(32, 7).magic().s, 2U); 598 } 599 600 TEST(APIntTest, magicu) { 601 EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16)); 602 EXPECT_EQ(APInt(32, 3).magicu().s, 1U); 603 EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16)); 604 EXPECT_EQ(APInt(32, 5).magicu().s, 2U); 605 EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16)); 606 EXPECT_EQ(APInt(32, 7).magicu().s, 3U); 607 EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16)); 608 EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U); 609 } 610 611 #ifdef GTEST_HAS_DEATH_TEST 612 #ifndef NDEBUG 613 TEST(APIntTest, StringDeath) { 614 EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small"); 615 EXPECT_DEATH(APInt(32, "", 0), "Invalid string length"); 616 EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!"); 617 EXPECT_DEATH(APInt(32, "", 10), "Invalid string length"); 618 EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value."); 619 EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width"); 620 EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length"); 621 EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string"); 622 EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string"); 623 } 624 #endif 625 #endif 626 627 TEST(APIntTest, mul_clear) { 628 APInt ValA(65, -1ULL); 629 APInt ValB(65, 4); 630 APInt ValC(65, 0); 631 ValC = ValA * ValB; 632 ValA *= ValB; 633 EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false)); 634 } 635 636 TEST(APIntTest, Rotate) { 637 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(0)); 638 EXPECT_EQ(APInt(8, 2), APInt(8, 1).rotl(1)); 639 EXPECT_EQ(APInt(8, 4), APInt(8, 1).rotl(2)); 640 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4)); 641 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(8)); 642 643 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0)); 644 EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1)); 645 EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2)); 646 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotl(4)); 647 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8)); 648 649 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0)); 650 EXPECT_EQ(APInt(8, 8), APInt(8, 16).rotr(1)); 651 EXPECT_EQ(APInt(8, 4), APInt(8, 16).rotr(2)); 652 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotr(4)); 653 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8)); 654 655 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(0)); 656 EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1)); 657 EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2)); 658 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4)); 659 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8)); 660 661 APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16); 662 APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16); 663 EXPECT_EQ(Rot, Big.rotr(144)); 664 } 665 666 TEST(APIntTest, Splat) { 667 APInt ValA(8, 0x01); 668 EXPECT_EQ(ValA, APInt::getSplat(8, ValA)); 669 EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA)); 670 671 APInt ValB(3, 5); 672 EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB)); 673 EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB)); 674 } 675 676 TEST(APIntTest, tcDecrement) { 677 // Test single word decrement. 678 679 // No out borrow. 680 { 681 integerPart singleWord = ~integerPart(0) << (integerPartWidth - 1); 682 integerPart carry = APInt::tcDecrement(&singleWord, 1); 683 EXPECT_EQ(carry, integerPart(0)); 684 EXPECT_EQ(singleWord, ~integerPart(0) >> 1); 685 } 686 687 // With out borrow. 688 { 689 integerPart singleWord = 0; 690 integerPart carry = APInt::tcDecrement(&singleWord, 1); 691 EXPECT_EQ(carry, integerPart(1)); 692 EXPECT_EQ(singleWord, ~integerPart(0)); 693 } 694 695 // Test multiword decrement. 696 697 // No across word borrow, no out borrow. 698 { 699 integerPart test[4] = {0x1, 0x1, 0x1, 0x1}; 700 integerPart expected[4] = {0x0, 0x1, 0x1, 0x1}; 701 APInt::tcDecrement(test, 4); 702 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 703 } 704 705 // 1 across word borrow, no out borrow. 706 { 707 integerPart test[4] = {0x0, 0xF, 0x1, 0x1}; 708 integerPart expected[4] = {~integerPart(0), 0xE, 0x1, 0x1}; 709 integerPart carry = APInt::tcDecrement(test, 4); 710 EXPECT_EQ(carry, integerPart(0)); 711 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 712 } 713 714 // 2 across word borrow, no out borrow. 715 { 716 integerPart test[4] = {0x0, 0x0, 0xC, 0x1}; 717 integerPart expected[4] = {~integerPart(0), ~integerPart(0), 0xB, 0x1}; 718 integerPart carry = APInt::tcDecrement(test, 4); 719 EXPECT_EQ(carry, integerPart(0)); 720 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 721 } 722 723 // 3 across word borrow, no out borrow. 724 { 725 integerPart test[4] = {0x0, 0x0, 0x0, 0x1}; 726 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), 0x0}; 727 integerPart carry = APInt::tcDecrement(test, 4); 728 EXPECT_EQ(carry, integerPart(0)); 729 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 730 } 731 732 // 3 across word borrow, with out borrow. 733 { 734 integerPart test[4] = {0x0, 0x0, 0x0, 0x0}; 735 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), ~integerPart(0)}; 736 integerPart carry = APInt::tcDecrement(test, 4); 737 EXPECT_EQ(carry, integerPart(1)); 738 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 739 } 740 } 741 742 TEST(APIntTest, arrayAccess) { 743 // Single word check. 744 uint64_t E1 = 0x2CA7F46BF6569915ULL; 745 APInt A1(64, E1); 746 for (unsigned i = 0, e = 64; i < e; ++i) { 747 EXPECT_EQ(bool(E1 & (1ULL << i)), 748 A1[i]); 749 } 750 751 // Multiword check. 752 integerPart E2[4] = { 753 0xEB6EB136591CBA21ULL, 754 0x7B9358BD6A33F10AULL, 755 0x7E7FFA5EADD8846ULL, 756 0x305F341CA00B613DULL 757 }; 758 APInt A2(integerPartWidth*4, E2); 759 for (unsigned i = 0; i < 4; ++i) { 760 for (unsigned j = 0; j < integerPartWidth; ++j) { 761 EXPECT_EQ(bool(E2[i] & (1ULL << j)), 762 A2[i*integerPartWidth + j]); 763 } 764 } 765 } 766 767 TEST(APIntTest, LargeAPIntConstruction) { 768 // Check that we can properly construct very large APInt. It is very 769 // unlikely that people will ever do this, but it is a legal input, 770 // so we should not crash on it. 771 APInt A9(UINT32_MAX, 0); 772 EXPECT_FALSE(A9.getBoolValue()); 773 } 774 775 TEST(APIntTest, nearestLogBase2) { 776 // Single word check. 777 778 // Test round up. 779 uint64_t I1 = 0x1800001; 780 APInt A1(64, I1); 781 EXPECT_EQ(A1.nearestLogBase2(), A1.ceilLogBase2()); 782 783 // Test round down. 784 uint64_t I2 = 0x1000011; 785 APInt A2(64, I2); 786 EXPECT_EQ(A2.nearestLogBase2(), A2.logBase2()); 787 788 // Test ties round up. 789 uint64_t I3 = 0x1800000; 790 APInt A3(64, I3); 791 EXPECT_EQ(A3.nearestLogBase2(), A3.ceilLogBase2()); 792 793 // Multiple word check. 794 795 // Test round up. 796 integerPart I4[4] = {0x0, 0xF, 0x18, 0x0}; 797 APInt A4(integerPartWidth*4, I4); 798 EXPECT_EQ(A4.nearestLogBase2(), A4.ceilLogBase2()); 799 800 // Test round down. 801 integerPart I5[4] = {0x0, 0xF, 0x10, 0x0}; 802 APInt A5(integerPartWidth*4, I5); 803 EXPECT_EQ(A5.nearestLogBase2(), A5.logBase2()); 804 805 // Test ties round up. 806 uint64_t I6[4] = {0x0, 0x0, 0x0, 0x18}; 807 APInt A6(integerPartWidth*4, I6); 808 EXPECT_EQ(A6.nearestLogBase2(), A6.ceilLogBase2()); 809 810 // Test BitWidth == 1 special cases. 811 APInt A7(1, 1); 812 EXPECT_EQ(A7.nearestLogBase2(), 0ULL); 813 APInt A8(1, 0); 814 EXPECT_EQ(A8.nearestLogBase2(), UINT32_MAX); 815 816 // Test the zero case when we have a bit width large enough such 817 // that the bit width is larger than UINT32_MAX-1. 818 APInt A9(UINT32_MAX, 0); 819 EXPECT_EQ(A9.nearestLogBase2(), UINT32_MAX); 820 } 821 822 TEST(APIntTest, IsSplat) { 823 APInt A(32, 0x01010101); 824 EXPECT_FALSE(A.isSplat(1)); 825 EXPECT_FALSE(A.isSplat(2)); 826 EXPECT_FALSE(A.isSplat(4)); 827 EXPECT_TRUE(A.isSplat(8)); 828 EXPECT_TRUE(A.isSplat(16)); 829 EXPECT_TRUE(A.isSplat(32)); 830 831 APInt B(24, 0xAAAAAA); 832 EXPECT_FALSE(B.isSplat(1)); 833 EXPECT_TRUE(B.isSplat(2)); 834 EXPECT_TRUE(B.isSplat(4)); 835 EXPECT_TRUE(B.isSplat(8)); 836 EXPECT_TRUE(B.isSplat(24)); 837 838 APInt C(24, 0xABAAAB); 839 EXPECT_FALSE(C.isSplat(1)); 840 EXPECT_FALSE(C.isSplat(2)); 841 EXPECT_FALSE(C.isSplat(4)); 842 EXPECT_FALSE(C.isSplat(8)); 843 EXPECT_TRUE(C.isSplat(24)); 844 845 APInt D(32, 0xABBAABBA); 846 EXPECT_FALSE(D.isSplat(1)); 847 EXPECT_FALSE(D.isSplat(2)); 848 EXPECT_FALSE(D.isSplat(4)); 849 EXPECT_FALSE(D.isSplat(8)); 850 EXPECT_TRUE(D.isSplat(16)); 851 EXPECT_TRUE(D.isSplat(32)); 852 853 APInt E(32, 0); 854 EXPECT_TRUE(E.isSplat(1)); 855 EXPECT_TRUE(E.isSplat(2)); 856 EXPECT_TRUE(E.isSplat(4)); 857 EXPECT_TRUE(E.isSplat(8)); 858 EXPECT_TRUE(E.isSplat(16)); 859 EXPECT_TRUE(E.isSplat(32)); 860 } 861 862 #if defined(__clang__) 863 // Disable the pragma warning from versions of Clang without -Wself-move 864 #pragma clang diagnostic push 865 #pragma clang diagnostic ignored "-Wunknown-pragmas" 866 // Disable the warning that triggers on exactly what is being tested. 867 #pragma clang diagnostic push 868 #pragma clang diagnostic ignored "-Wself-move" 869 #endif 870 TEST(APIntTest, SelfMoveAssignment) { 871 APInt X(32, 0xdeadbeef); 872 X = std::move(X); 873 EXPECT_EQ(32u, X.getBitWidth()); 874 EXPECT_EQ(0xdeadbeefULL, X.getLimitedValue()); 875 876 uint64_t Bits[] = {0xdeadbeefdeadbeefULL, 0xdeadbeefdeadbeefULL}; 877 APInt Y(128, Bits); 878 Y = std::move(Y); 879 EXPECT_EQ(128u, Y.getBitWidth()); 880 EXPECT_EQ(~0ULL, Y.getLimitedValue()); 881 const uint64_t *Raw = Y.getRawData(); 882 EXPECT_EQ(2u, Y.getNumWords()); 883 EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[0]); 884 EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[1]); 885 } 886 #if defined(__clang__) 887 #pragma clang diagnostic pop 888 #pragma clang diagnostic pop 889 #endif 890 } 891