unittests/ADT/APIntTest.cpp

   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 TEST(APIntTest, extractBit) {
 602   // Single word check.
 603   uint64_t E1 = 0x2CA7F46BF6569915ULL;
 604   APInt A1(64, E1);
 605   for (unsigned i = 0, e = 64; i < e; ++i) {
 606     EXPECT_EQ(bool(E1 & (1ULL << i)),
 607               A1.extractBit(i));
 608   }
 609
 610   // Multiword check.
 611   integerPart E2[4] = {
 612     0xeb6eb136591cba21ULL,
 613     0x7b9358bd6a33f10aULL,
 614     0x7e7ffa5eadd8846ULL,
 615     0x305f341ca00b613dULL
 616   };
 617   APInt A2(integerPartWidth*4, ArrayRef<integerPart>(E2, 4));
 618   for (unsigned i = 0; i < 4; ++i) {
 619     for (unsigned j = 0; j < integerPartWidth; ++j) {
 620       EXPECT_EQ(bool(E2[i] & (1ULL << j)),
 621                 A2.extractBit(i*integerPartWidth + j));
 622     }
 623   }
 624 }
 625
 626 }