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 TEST(APIntTest, fromString) { 213 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2)); 214 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2)); 215 EXPECT_EQ(APInt(32, 2), APInt(32, "10", 2)); 216 EXPECT_EQ(APInt(32, 3), APInt(32, "11", 2)); 217 EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2)); 218 219 EXPECT_EQ(APInt(32, 0), APInt(32, "+0", 2)); 220 EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2)); 221 EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2)); 222 EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2)); 223 EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2)); 224 225 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 2)); 226 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 2)); 227 EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32, "-10", 2)); 228 EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32, "-11", 2)); 229 EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2)); 230 231 232 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8)); 233 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8)); 234 EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8)); 235 EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8)); 236 EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8)); 237 EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8)); 238 239 EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8)); 240 EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8)); 241 EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8)); 242 EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8)); 243 EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8)); 244 EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8)); 245 246 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 8)); 247 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 8)); 248 EXPECT_EQ(APInt(32, uint64_t(-7LL)), APInt(32, "-7", 8)); 249 EXPECT_EQ(APInt(32, uint64_t(-8LL)), APInt(32, "-10", 8)); 250 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-17", 8)); 251 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-20", 8)); 252 253 254 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10)); 255 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10)); 256 EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10)); 257 EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10)); 258 EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10)); 259 EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10)); 260 261 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 10)); 262 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 10)); 263 EXPECT_EQ(APInt(32, uint64_t(-9LL)), APInt(32, "-9", 10)); 264 EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10)); 265 EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10)); 266 EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10)); 267 268 269 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16)); 270 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16)); 271 EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16)); 272 EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16)); 273 EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16)); 274 EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16)); 275 276 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 16)); 277 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 16)); 278 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-F", 16)); 279 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16)); 280 EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16)); 281 EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16)); 282 283 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 36)); 284 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 36)); 285 EXPECT_EQ(APInt(32, 35), APInt(32, "Z", 36)); 286 EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36)); 287 EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36)); 288 EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36)); 289 290 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 36)); 291 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 36)); 292 EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32, "-Z", 36)); 293 EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36)); 294 EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36)); 295 EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36)); 296 } 297 298 TEST(APIntTest, FromArray) { 299 EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1))); 300 } 301 302 TEST(APIntTest, StringBitsNeeded2) { 303 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 2)); 304 EXPECT_EQ(1U, APInt::getBitsNeeded( "1", 2)); 305 EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2)); 306 EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2)); 307 EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2)); 308 309 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 2)); 310 EXPECT_EQ(1U, APInt::getBitsNeeded( "+1", 2)); 311 EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2)); 312 EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2)); 313 EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2)); 314 315 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 2)); 316 EXPECT_EQ(2U, APInt::getBitsNeeded( "-1", 2)); 317 EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2)); 318 EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2)); 319 EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2)); 320 } 321 322 TEST(APIntTest, StringBitsNeeded8) { 323 EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8)); 324 EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8)); 325 EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8)); 326 EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8)); 327 EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8)); 328 329 EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8)); 330 EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8)); 331 EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8)); 332 EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8)); 333 EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8)); 334 335 EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8)); 336 EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8)); 337 EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8)); 338 EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8)); 339 EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8)); 340 } 341 342 TEST(APIntTest, StringBitsNeeded10) { 343 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10)); 344 EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10)); 345 EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10)); 346 EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10)); 347 EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10)); 348 EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10)); 349 350 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10)); 351 EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10)); 352 EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10)); 353 EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10)); 354 EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10)); 355 356 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10)); 357 EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10)); 358 EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10)); 359 EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10)); 360 EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10)); 361 } 362 363 TEST(APIntTest, StringBitsNeeded16) { 364 EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16)); 365 EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16)); 366 EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16)); 367 EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16)); 368 EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16)); 369 370 EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16)); 371 EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16)); 372 EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16)); 373 EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16)); 374 EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16)); 375 376 EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16)); 377 EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16)); 378 EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16)); 379 EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16)); 380 EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16)); 381 } 382 383 TEST(APIntTest, toString) { 384 SmallString<16> S; 385 bool isSigned; 386 387 APInt(8, 0).toString(S, 2, true, true); 388 EXPECT_EQ(S.str().str(), "0b0"); 389 S.clear(); 390 APInt(8, 0).toString(S, 8, true, true); 391 EXPECT_EQ(S.str().str(), "00"); 392 S.clear(); 393 APInt(8, 0).toString(S, 10, true, true); 394 EXPECT_EQ(S.str().str(), "0"); 395 S.clear(); 396 APInt(8, 0).toString(S, 16, true, true); 397 EXPECT_EQ(S.str().str(), "0x0"); 398 S.clear(); 399 APInt(8, 0).toString(S, 36, true, false); 400 EXPECT_EQ(S.str().str(), "0"); 401 S.clear(); 402 403 isSigned = false; 404 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 405 EXPECT_EQ(S.str().str(), "0b11111111"); 406 S.clear(); 407 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 408 EXPECT_EQ(S.str().str(), "0377"); 409 S.clear(); 410 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 411 EXPECT_EQ(S.str().str(), "255"); 412 S.clear(); 413 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 414 EXPECT_EQ(S.str().str(), "0xFF"); 415 S.clear(); 416 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 417 EXPECT_EQ(S.str().str(), "73"); 418 S.clear(); 419 420 isSigned = true; 421 APInt(8, 255, isSigned).toString(S, 2, isSigned, true); 422 EXPECT_EQ(S.str().str(), "-0b1"); 423 S.clear(); 424 APInt(8, 255, isSigned).toString(S, 8, isSigned, true); 425 EXPECT_EQ(S.str().str(), "-01"); 426 S.clear(); 427 APInt(8, 255, isSigned).toString(S, 10, isSigned, true); 428 EXPECT_EQ(S.str().str(), "-1"); 429 S.clear(); 430 APInt(8, 255, isSigned).toString(S, 16, isSigned, true); 431 EXPECT_EQ(S.str().str(), "-0x1"); 432 S.clear(); 433 APInt(8, 255, isSigned).toString(S, 36, isSigned, false); 434 EXPECT_EQ(S.str().str(), "-1"); 435 S.clear(); 436 } 437 438 TEST(APIntTest, Log2) { 439 EXPECT_EQ(APInt(15, 7).logBase2(), 2U); 440 EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U); 441 EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1); 442 EXPECT_EQ(APInt(15, 8).logBase2(), 3U); 443 EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U); 444 EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3); 445 EXPECT_EQ(APInt(15, 9).logBase2(), 3U); 446 EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U); 447 EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1); 448 } 449 450 TEST(APIntTest, magic) { 451 EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16)); 452 EXPECT_EQ(APInt(32, 3).magic().s, 0U); 453 EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16)); 454 EXPECT_EQ(APInt(32, 5).magic().s, 1U); 455 EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16)); 456 EXPECT_EQ(APInt(32, 7).magic().s, 2U); 457 } 458 459 TEST(APIntTest, magicu) { 460 EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16)); 461 EXPECT_EQ(APInt(32, 3).magicu().s, 1U); 462 EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16)); 463 EXPECT_EQ(APInt(32, 5).magicu().s, 2U); 464 EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16)); 465 EXPECT_EQ(APInt(32, 7).magicu().s, 3U); 466 EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16)); 467 EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U); 468 } 469 470 #ifdef GTEST_HAS_DEATH_TEST 471 #ifndef NDEBUG 472 TEST(APIntTest, StringDeath) { 473 EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small"); 474 EXPECT_DEATH(APInt(32, "", 0), "Invalid string length"); 475 EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!"); 476 EXPECT_DEATH(APInt(32, "", 10), "Invalid string length"); 477 EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value."); 478 EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width"); 479 EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length"); 480 EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string"); 481 EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string"); 482 } 483 #endif 484 #endif 485 486 TEST(APIntTest, mul_clear) { 487 APInt ValA(65, -1ULL); 488 APInt ValB(65, 4); 489 APInt ValC(65, 0); 490 ValC = ValA * ValB; 491 ValA *= ValB; 492 EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false)); 493 } 494 495 TEST(APIntTest, Rotate) { 496 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(0)); 497 EXPECT_EQ(APInt(8, 2), APInt(8, 1).rotl(1)); 498 EXPECT_EQ(APInt(8, 4), APInt(8, 1).rotl(2)); 499 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4)); 500 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotl(8)); 501 502 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0)); 503 EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1)); 504 EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2)); 505 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotl(4)); 506 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8)); 507 508 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0)); 509 EXPECT_EQ(APInt(8, 8), APInt(8, 16).rotr(1)); 510 EXPECT_EQ(APInt(8, 4), APInt(8, 16).rotr(2)); 511 EXPECT_EQ(APInt(8, 1), APInt(8, 16).rotr(4)); 512 EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8)); 513 514 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(0)); 515 EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1)); 516 EXPECT_EQ(APInt(8, 64), APInt(8, 1).rotr(2)); 517 EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotr(4)); 518 EXPECT_EQ(APInt(8, 1), APInt(8, 1).rotr(8)); 519 520 APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16); 521 APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16); 522 EXPECT_EQ(Rot, Big.rotr(144)); 523 } 524 525 TEST(APIntTest, Splat) { 526 APInt ValA(8, 0x01); 527 EXPECT_EQ(ValA, APInt::getSplat(8, ValA)); 528 EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA)); 529 530 APInt ValB(3, 5); 531 EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB)); 532 EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB)); 533 } 534 535 TEST(APIntTest, tcDecrement) { 536 // Test single word decrement. 537 538 // No out borrow. 539 { 540 integerPart singleWord = ~integerPart(0) << (integerPartWidth - 1); 541 integerPart carry = APInt::tcDecrement(&singleWord, 1); 542 EXPECT_EQ(carry, integerPart(0)); 543 EXPECT_EQ(singleWord, ~integerPart(0) >> 1); 544 } 545 546 // With out borrow. 547 { 548 integerPart singleWord = 0; 549 integerPart carry = APInt::tcDecrement(&singleWord, 1); 550 EXPECT_EQ(carry, integerPart(1)); 551 EXPECT_EQ(singleWord, ~integerPart(0)); 552 } 553 554 // Test multiword decrement. 555 556 // No across word borrow, no out borrow. 557 { 558 integerPart test[4] = {0x1, 0x1, 0x1, 0x1}; 559 integerPart expected[4] = {0x0, 0x1, 0x1, 0x1}; 560 APInt::tcDecrement(test, 4); 561 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 562 } 563 564 // 1 across word borrow, no out borrow. 565 { 566 integerPart test[4] = {0x0, 0xF, 0x1, 0x1}; 567 integerPart expected[4] = {~integerPart(0), 0xE, 0x1, 0x1}; 568 integerPart carry = APInt::tcDecrement(test, 4); 569 EXPECT_EQ(carry, integerPart(0)); 570 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 571 } 572 573 // 2 across word borrow, no out borrow. 574 { 575 integerPart test[4] = {0x0, 0x0, 0xC, 0x1}; 576 integerPart expected[4] = {~integerPart(0), ~integerPart(0), 0xB, 0x1}; 577 integerPart carry = APInt::tcDecrement(test, 4); 578 EXPECT_EQ(carry, integerPart(0)); 579 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 580 } 581 582 // 3 across word borrow, no out borrow. 583 { 584 integerPart test[4] = {0x0, 0x0, 0x0, 0x1}; 585 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), 0x0}; 586 integerPart carry = APInt::tcDecrement(test, 4); 587 EXPECT_EQ(carry, integerPart(0)); 588 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 589 } 590 591 // 3 across word borrow, with out borrow. 592 { 593 integerPart test[4] = {0x0, 0x0, 0x0, 0x0}; 594 integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), ~integerPart(0)}; 595 integerPart carry = APInt::tcDecrement(test, 4); 596 EXPECT_EQ(carry, integerPart(1)); 597 EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0); 598 } 599 } 600 } 601
