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/ArrayRef.h"
12#include "llvm/ADT/SmallString.h"
13#include "gtest/gtest.h"
14#include <array>
15
16using namespace llvm;
17
18namespace {
19
20TEST(APIntTest, ValueInit) {
21  APInt Zero = APInt();
22  EXPECT_TRUE(!Zero);
23  EXPECT_TRUE(!Zero.zext(64));
24  EXPECT_TRUE(!Zero.sext(64));
25}
26
27// Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
28TEST(APIntTest, ShiftLeftByZero) {
29  APInt One = APInt::getNullValue(65) + 1;
30  APInt Shl = One.shl(0);
31  EXPECT_TRUE(Shl[0]);
32  EXPECT_FALSE(Shl[1]);
33}
34
35TEST(APIntTest, i128_NegativeCount) {
36  APInt Minus3(128, static_cast<uint64_t>(-3), true);
37  EXPECT_EQ(126u, Minus3.countLeadingOnes());
38  EXPECT_EQ(-3, Minus3.getSExtValue());
39
40  APInt Minus1(128, static_cast<uint64_t>(-1), true);
41  EXPECT_EQ(0u, Minus1.countLeadingZeros());
42  EXPECT_EQ(128u, Minus1.countLeadingOnes());
43  EXPECT_EQ(128u, Minus1.getActiveBits());
44  EXPECT_EQ(0u, Minus1.countTrailingZeros());
45  EXPECT_EQ(128u, Minus1.countTrailingOnes());
46  EXPECT_EQ(128u, Minus1.countPopulation());
47  EXPECT_EQ(-1, Minus1.getSExtValue());
48}
49
50// XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it.
51#if defined(__llvm__) || !defined(__FreeBSD__)
52
53TEST(APIntTest, i33_Count) {
54  APInt i33minus2(33, static_cast<uint64_t>(-2), true);
55  EXPECT_EQ(0u, i33minus2.countLeadingZeros());
56  EXPECT_EQ(32u, i33minus2.countLeadingOnes());
57  EXPECT_EQ(33u, i33minus2.getActiveBits());
58  EXPECT_EQ(1u, i33minus2.countTrailingZeros());
59  EXPECT_EQ(32u, i33minus2.countPopulation());
60  EXPECT_EQ(-2, i33minus2.getSExtValue());
61  EXPECT_EQ(((uint64_t)-2)&((1ull<<33) -1), i33minus2.getZExtValue());
62}
63
64#endif
65
66TEST(APIntTest, i65_Count) {
67  APInt i65(65, 0, true);
68  EXPECT_EQ(65u, i65.countLeadingZeros());
69  EXPECT_EQ(0u, i65.countLeadingOnes());
70  EXPECT_EQ(0u, i65.getActiveBits());
71  EXPECT_EQ(1u, i65.getActiveWords());
72  EXPECT_EQ(65u, i65.countTrailingZeros());
73  EXPECT_EQ(0u, i65.countPopulation());
74
75  APInt i65minus(65, 0, true);
76  i65minus.setBit(64);
77  EXPECT_EQ(0u, i65minus.countLeadingZeros());
78  EXPECT_EQ(1u, i65minus.countLeadingOnes());
79  EXPECT_EQ(65u, i65minus.getActiveBits());
80  EXPECT_EQ(64u, i65minus.countTrailingZeros());
81  EXPECT_EQ(1u, i65minus.countPopulation());
82}
83
84TEST(APIntTest, i128_PositiveCount) {
85  APInt u128max = APInt::getAllOnesValue(128);
86  EXPECT_EQ(128u, u128max.countLeadingOnes());
87  EXPECT_EQ(0u, u128max.countLeadingZeros());
88  EXPECT_EQ(128u, u128max.getActiveBits());
89  EXPECT_EQ(0u, u128max.countTrailingZeros());
90  EXPECT_EQ(128u, u128max.countTrailingOnes());
91  EXPECT_EQ(128u, u128max.countPopulation());
92
93  APInt u64max(128, static_cast<uint64_t>(-1), false);
94  EXPECT_EQ(64u, u64max.countLeadingZeros());
95  EXPECT_EQ(0u, u64max.countLeadingOnes());
96  EXPECT_EQ(64u, u64max.getActiveBits());
97  EXPECT_EQ(0u, u64max.countTrailingZeros());
98  EXPECT_EQ(64u, u64max.countTrailingOnes());
99  EXPECT_EQ(64u, u64max.countPopulation());
100  EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue());
101
102  APInt zero(128, 0, true);
103  EXPECT_EQ(128u, zero.countLeadingZeros());
104  EXPECT_EQ(0u, zero.countLeadingOnes());
105  EXPECT_EQ(0u, zero.getActiveBits());
106  EXPECT_EQ(128u, zero.countTrailingZeros());
107  EXPECT_EQ(0u, zero.countTrailingOnes());
108  EXPECT_EQ(0u, zero.countPopulation());
109  EXPECT_EQ(0u, zero.getSExtValue());
110  EXPECT_EQ(0u, zero.getZExtValue());
111
112  APInt one(128, 1, true);
113  EXPECT_EQ(127u, one.countLeadingZeros());
114  EXPECT_EQ(0u, one.countLeadingOnes());
115  EXPECT_EQ(1u, one.getActiveBits());
116  EXPECT_EQ(0u, one.countTrailingZeros());
117  EXPECT_EQ(1u, one.countTrailingOnes());
118  EXPECT_EQ(1u, one.countPopulation());
119  EXPECT_EQ(1, one.getSExtValue());
120  EXPECT_EQ(1u, one.getZExtValue());
121}
122
123TEST(APIntTest, i1) {
124  const APInt neg_two(1, static_cast<uint64_t>(-2), true);
125  const APInt neg_one(1, static_cast<uint64_t>(-1), true);
126  const APInt zero(1, 0);
127  const APInt one(1, 1);
128  const APInt two(1, 2);
129
130  EXPECT_EQ(0, neg_two.getSExtValue());
131  EXPECT_EQ(-1, neg_one.getSExtValue());
132  EXPECT_EQ(1u, neg_one.getZExtValue());
133  EXPECT_EQ(0u, zero.getZExtValue());
134  EXPECT_EQ(-1, one.getSExtValue());
135  EXPECT_EQ(1u, one.getZExtValue());
136  EXPECT_EQ(0u, two.getZExtValue());
137  EXPECT_EQ(0, two.getSExtValue());
138
139  // Basic equalities for 1-bit values.
140  EXPECT_EQ(zero, two);
141  EXPECT_EQ(zero, neg_two);
142  EXPECT_EQ(one, neg_one);
143  EXPECT_EQ(two, neg_two);
144
145  // Min/max signed values.
146  EXPECT_TRUE(zero.isMaxSignedValue());
147  EXPECT_FALSE(one.isMaxSignedValue());
148  EXPECT_FALSE(zero.isMinSignedValue());
149  EXPECT_TRUE(one.isMinSignedValue());
150
151  // Additions.
152  EXPECT_EQ(two, one + one);
153  EXPECT_EQ(zero, neg_one + one);
154  EXPECT_EQ(neg_two, neg_one + neg_one);
155
156  // Subtractions.
157  EXPECT_EQ(neg_two, neg_one - one);
158  EXPECT_EQ(two, one - neg_one);
159  EXPECT_EQ(zero, one - one);
160
161  // Shifts.
162  EXPECT_EQ(zero, one << one);
163  EXPECT_EQ(one, one << zero);
164  EXPECT_EQ(zero, one.shl(1));
165  EXPECT_EQ(one, one.shl(0));
166  EXPECT_EQ(zero, one.lshr(1));
167  EXPECT_EQ(zero, one.ashr(1));
168
169  // Rotates.
170  EXPECT_EQ(one, one.rotl(0));
171  EXPECT_EQ(one, one.rotl(1));
172  EXPECT_EQ(one, one.rotr(0));
173  EXPECT_EQ(one, one.rotr(1));
174
175  // Multiplies.
176  EXPECT_EQ(neg_one, neg_one * one);
177  EXPECT_EQ(neg_one, one * neg_one);
178  EXPECT_EQ(one, neg_one * neg_one);
179  EXPECT_EQ(one, one * one);
180
181  // Divides.
182  EXPECT_EQ(neg_one, one.sdiv(neg_one));
183  EXPECT_EQ(neg_one, neg_one.sdiv(one));
184  EXPECT_EQ(one, neg_one.sdiv(neg_one));
185  EXPECT_EQ(one, one.sdiv(one));
186
187  EXPECT_EQ(neg_one, one.udiv(neg_one));
188  EXPECT_EQ(neg_one, neg_one.udiv(one));
189  EXPECT_EQ(one, neg_one.udiv(neg_one));
190  EXPECT_EQ(one, one.udiv(one));
191
192  // Remainders.
193  EXPECT_EQ(zero, neg_one.srem(one));
194  EXPECT_EQ(zero, neg_one.urem(one));
195  EXPECT_EQ(zero, one.srem(neg_one));
196
197  // sdivrem
198  {
199  APInt q(8, 0);
200  APInt r(8, 0);
201  APInt one(8, 1);
202  APInt two(8, 2);
203  APInt nine(8, 9);
204  APInt four(8, 4);
205
206  EXPECT_EQ(nine.srem(two), one);
207  EXPECT_EQ(nine.srem(-two), one);
208  EXPECT_EQ((-nine).srem(two), -one);
209  EXPECT_EQ((-nine).srem(-two), -one);
210
211  APInt::sdivrem(nine, two, q, r);
212  EXPECT_EQ(four, q);
213  EXPECT_EQ(one, r);
214  APInt::sdivrem(-nine, two, q, r);
215  EXPECT_EQ(-four, q);
216  EXPECT_EQ(-one, r);
217  APInt::sdivrem(nine, -two, q, r);
218  EXPECT_EQ(-four, q);
219  EXPECT_EQ(one, r);
220  APInt::sdivrem(-nine, -two, q, r);
221  EXPECT_EQ(four, q);
222  EXPECT_EQ(-one, r);
223  }
224}
225
226TEST(APIntTest, compare) {
227  std::array<APInt, 5> testVals{{
228    APInt{16, 2},
229    APInt{16, 1},
230    APInt{16, 0},
231    APInt{16, (uint64_t)-1, true},
232    APInt{16, (uint64_t)-2, true},
233  }};
234
235  for (auto &arg1 : testVals)
236    for (auto &arg2 : testVals) {
237      auto uv1 = arg1.getZExtValue();
238      auto uv2 = arg2.getZExtValue();
239      auto sv1 = arg1.getSExtValue();
240      auto sv2 = arg2.getSExtValue();
241
242      EXPECT_EQ(uv1 <  uv2, arg1.ult(arg2));
243      EXPECT_EQ(uv1 <= uv2, arg1.ule(arg2));
244      EXPECT_EQ(uv1 >  uv2, arg1.ugt(arg2));
245      EXPECT_EQ(uv1 >= uv2, arg1.uge(arg2));
246
247      EXPECT_EQ(sv1 <  sv2, arg1.slt(arg2));
248      EXPECT_EQ(sv1 <= sv2, arg1.sle(arg2));
249      EXPECT_EQ(sv1 >  sv2, arg1.sgt(arg2));
250      EXPECT_EQ(sv1 >= sv2, arg1.sge(arg2));
251
252      EXPECT_EQ(uv1 <  uv2, arg1.ult(uv2));
253      EXPECT_EQ(uv1 <= uv2, arg1.ule(uv2));
254      EXPECT_EQ(uv1 >  uv2, arg1.ugt(uv2));
255      EXPECT_EQ(uv1 >= uv2, arg1.uge(uv2));
256
257      EXPECT_EQ(sv1 <  sv2, arg1.slt(sv2));
258      EXPECT_EQ(sv1 <= sv2, arg1.sle(sv2));
259      EXPECT_EQ(sv1 >  sv2, arg1.sgt(sv2));
260      EXPECT_EQ(sv1 >= sv2, arg1.sge(sv2));
261    }
262}
263
264TEST(APIntTest, compareWithRawIntegers) {
265  EXPECT_TRUE(!APInt(8, 1).uge(256));
266  EXPECT_TRUE(!APInt(8, 1).ugt(256));
267  EXPECT_TRUE( APInt(8, 1).ule(256));
268  EXPECT_TRUE( APInt(8, 1).ult(256));
269  EXPECT_TRUE(!APInt(8, 1).sge(256));
270  EXPECT_TRUE(!APInt(8, 1).sgt(256));
271  EXPECT_TRUE( APInt(8, 1).sle(256));
272  EXPECT_TRUE( APInt(8, 1).slt(256));
273  EXPECT_TRUE(!(APInt(8, 0) == 256));
274  EXPECT_TRUE(  APInt(8, 0) != 256);
275  EXPECT_TRUE(!(APInt(8, 1) == 256));
276  EXPECT_TRUE(  APInt(8, 1) != 256);
277
278  auto uint64max = UINT64_MAX;
279  auto int64max  = INT64_MAX;
280  auto int64min  = INT64_MIN;
281
282  auto u64 = APInt{128, uint64max};
283  auto s64 = APInt{128, static_cast<uint64_t>(int64max), true};
284  auto big = u64 + 1;
285
286  EXPECT_TRUE( u64.uge(uint64max));
287  EXPECT_TRUE(!u64.ugt(uint64max));
288  EXPECT_TRUE( u64.ule(uint64max));
289  EXPECT_TRUE(!u64.ult(uint64max));
290  EXPECT_TRUE( u64.sge(int64max));
291  EXPECT_TRUE( u64.sgt(int64max));
292  EXPECT_TRUE(!u64.sle(int64max));
293  EXPECT_TRUE(!u64.slt(int64max));
294  EXPECT_TRUE( u64.sge(int64min));
295  EXPECT_TRUE( u64.sgt(int64min));
296  EXPECT_TRUE(!u64.sle(int64min));
297  EXPECT_TRUE(!u64.slt(int64min));
298
299  EXPECT_TRUE(u64 == uint64max);
300  EXPECT_TRUE(u64 != int64max);
301  EXPECT_TRUE(u64 != int64min);
302
303  EXPECT_TRUE(!s64.uge(uint64max));
304  EXPECT_TRUE(!s64.ugt(uint64max));
305  EXPECT_TRUE( s64.ule(uint64max));
306  EXPECT_TRUE( s64.ult(uint64max));
307  EXPECT_TRUE( s64.sge(int64max));
308  EXPECT_TRUE(!s64.sgt(int64max));
309  EXPECT_TRUE( s64.sle(int64max));
310  EXPECT_TRUE(!s64.slt(int64max));
311  EXPECT_TRUE( s64.sge(int64min));
312  EXPECT_TRUE( s64.sgt(int64min));
313  EXPECT_TRUE(!s64.sle(int64min));
314  EXPECT_TRUE(!s64.slt(int64min));
315
316  EXPECT_TRUE(s64 != uint64max);
317  EXPECT_TRUE(s64 == int64max);
318  EXPECT_TRUE(s64 != int64min);
319
320  EXPECT_TRUE( big.uge(uint64max));
321  EXPECT_TRUE( big.ugt(uint64max));
322  EXPECT_TRUE(!big.ule(uint64max));
323  EXPECT_TRUE(!big.ult(uint64max));
324  EXPECT_TRUE( big.sge(int64max));
325  EXPECT_TRUE( big.sgt(int64max));
326  EXPECT_TRUE(!big.sle(int64max));
327  EXPECT_TRUE(!big.slt(int64max));
328  EXPECT_TRUE( big.sge(int64min));
329  EXPECT_TRUE( big.sgt(int64min));
330  EXPECT_TRUE(!big.sle(int64min));
331  EXPECT_TRUE(!big.slt(int64min));
332
333  EXPECT_TRUE(big != uint64max);
334  EXPECT_TRUE(big != int64max);
335  EXPECT_TRUE(big != int64min);
336}
337
338TEST(APIntTest, compareWithInt64Min) {
339  int64_t edge = INT64_MIN;
340  int64_t edgeP1 = edge + 1;
341  int64_t edgeM1 = INT64_MAX;
342  auto a = APInt{64, static_cast<uint64_t>(edge), true};
343
344  EXPECT_TRUE(!a.slt(edge));
345  EXPECT_TRUE( a.sle(edge));
346  EXPECT_TRUE(!a.sgt(edge));
347  EXPECT_TRUE( a.sge(edge));
348  EXPECT_TRUE( a.slt(edgeP1));
349  EXPECT_TRUE( a.sle(edgeP1));
350  EXPECT_TRUE(!a.sgt(edgeP1));
351  EXPECT_TRUE(!a.sge(edgeP1));
352  EXPECT_TRUE( a.slt(edgeM1));
353  EXPECT_TRUE( a.sle(edgeM1));
354  EXPECT_TRUE(!a.sgt(edgeM1));
355  EXPECT_TRUE(!a.sge(edgeM1));
356}
357
358TEST(APIntTest, compareWithHalfInt64Max) {
359  uint64_t edge = 0x4000000000000000;
360  uint64_t edgeP1 = edge + 1;
361  uint64_t edgeM1 = edge - 1;
362  auto a = APInt{64, edge};
363
364  EXPECT_TRUE(!a.ult(edge));
365  EXPECT_TRUE( a.ule(edge));
366  EXPECT_TRUE(!a.ugt(edge));
367  EXPECT_TRUE( a.uge(edge));
368  EXPECT_TRUE( a.ult(edgeP1));
369  EXPECT_TRUE( a.ule(edgeP1));
370  EXPECT_TRUE(!a.ugt(edgeP1));
371  EXPECT_TRUE(!a.uge(edgeP1));
372  EXPECT_TRUE(!a.ult(edgeM1));
373  EXPECT_TRUE(!a.ule(edgeM1));
374  EXPECT_TRUE( a.ugt(edgeM1));
375  EXPECT_TRUE( a.uge(edgeM1));
376
377  EXPECT_TRUE(!a.slt(edge));
378  EXPECT_TRUE( a.sle(edge));
379  EXPECT_TRUE(!a.sgt(edge));
380  EXPECT_TRUE( a.sge(edge));
381  EXPECT_TRUE( a.slt(edgeP1));
382  EXPECT_TRUE( a.sle(edgeP1));
383  EXPECT_TRUE(!a.sgt(edgeP1));
384  EXPECT_TRUE(!a.sge(edgeP1));
385  EXPECT_TRUE(!a.slt(edgeM1));
386  EXPECT_TRUE(!a.sle(edgeM1));
387  EXPECT_TRUE( a.sgt(edgeM1));
388  EXPECT_TRUE( a.sge(edgeM1));
389}
390
391TEST(APIntTest, compareLargeIntegers) {
392  // Make sure all the combinations of signed comparisons work with big ints.
393  auto One = APInt{128, static_cast<uint64_t>(1), true};
394  auto Two = APInt{128, static_cast<uint64_t>(2), true};
395  auto MinusOne = APInt{128, static_cast<uint64_t>(-1), true};
396  auto MinusTwo = APInt{128, static_cast<uint64_t>(-2), true};
397
398  EXPECT_TRUE(!One.slt(One));
399  EXPECT_TRUE(!Two.slt(One));
400  EXPECT_TRUE(MinusOne.slt(One));
401  EXPECT_TRUE(MinusTwo.slt(One));
402
403  EXPECT_TRUE(One.slt(Two));
404  EXPECT_TRUE(!Two.slt(Two));
405  EXPECT_TRUE(MinusOne.slt(Two));
406  EXPECT_TRUE(MinusTwo.slt(Two));
407
408  EXPECT_TRUE(!One.slt(MinusOne));
409  EXPECT_TRUE(!Two.slt(MinusOne));
410  EXPECT_TRUE(!MinusOne.slt(MinusOne));
411  EXPECT_TRUE(MinusTwo.slt(MinusOne));
412
413  EXPECT_TRUE(!One.slt(MinusTwo));
414  EXPECT_TRUE(!Two.slt(MinusTwo));
415  EXPECT_TRUE(!MinusOne.slt(MinusTwo));
416  EXPECT_TRUE(!MinusTwo.slt(MinusTwo));
417}
418
419
420// Tests different div/rem varaints using scheme (a * b + c) / a
421void testDiv(APInt a, APInt b, APInt c) {
422  ASSERT_TRUE(a.uge(b)); // Must: a >= b
423  ASSERT_TRUE(a.ugt(c)); // Must: a > c
424
425  auto p = a * b + c;
426
427  auto q = p.udiv(a);
428  auto r = p.urem(a);
429  EXPECT_EQ(b, q);
430  EXPECT_EQ(c, r);
431  APInt::udivrem(p, a, q, r);
432  EXPECT_EQ(b, q);
433  EXPECT_EQ(c, r);
434  q = p.sdiv(a);
435  r = p.srem(a);
436  EXPECT_EQ(b, q);
437  EXPECT_EQ(c, r);
438  APInt::sdivrem(p, a, q, r);
439  EXPECT_EQ(b, q);
440  EXPECT_EQ(c, r);
441
442  if (b.ugt(c)) { // Test also symmetric case
443    q = p.udiv(b);
444    r = p.urem(b);
445    EXPECT_EQ(a, q);
446    EXPECT_EQ(c, r);
447    APInt::udivrem(p, b, q, r);
448    EXPECT_EQ(a, q);
449    EXPECT_EQ(c, r);
450    q = p.sdiv(b);
451    r = p.srem(b);
452    EXPECT_EQ(a, q);
453    EXPECT_EQ(c, r);
454    APInt::sdivrem(p, b, q, r);
455    EXPECT_EQ(a, q);
456    EXPECT_EQ(c, r);
457  }
458}
459
460TEST(APIntTest, divrem_big1) {
461  // Tests KnuthDiv rare step D6
462  testDiv({256, "1ffffffffffffffff", 16},
463          {256, "1ffffffffffffffff", 16},
464          {256, 0});
465}
466
467TEST(APIntTest, divrem_big2) {
468  // Tests KnuthDiv rare step D6
469  testDiv({1024,                       "112233ceff"
470                 "cecece000000ffffffffffffffffffff"
471                 "ffffffffffffffffffffffffffffffff"
472                 "ffffffffffffffffffffffffffffffff"
473                 "ffffffffffffffffffffffffffffff33", 16},
474          {1024,           "111111ffffffffffffffff"
475                 "ffffffffffffffffffffffffffffffff"
476                 "fffffffffffffffffffffffffffffccf"
477                 "ffffffffffffffffffffffffffffff00", 16},
478          {1024, 7919});
479}
480
481TEST(APIntTest, divrem_big3) {
482  // Tests KnuthDiv case without shift
483  testDiv({256, "80000001ffffffffffffffff", 16},
484          {256, "ffffffffffffff0000000", 16},
485          {256, 4219});
486}
487
488TEST(APIntTest, divrem_big4) {
489  // Tests heap allocation in divide() enfoced by huge numbers
490  testDiv(APInt{4096, 5}.shl(2001),
491          APInt{4096, 1}.shl(2000),
492          APInt{4096, 4219*13});
493}
494
495TEST(APIntTest, divrem_big5) {
496  // Tests one word divisor case of divide()
497  testDiv(APInt{1024, 19}.shl(811),
498          APInt{1024, 4356013}, // one word
499          APInt{1024, 1});
500}
501
502TEST(APIntTest, divrem_big6) {
503  // Tests some rare "borrow" cases in D4 step
504  testDiv(APInt{512, "ffffffffffffffff00000000000000000000000001", 16},
505          APInt{512, "10000000000000001000000000000001", 16},
506          APInt{512, "10000000000000000000000000000000", 16});
507}
508
509TEST(APIntTest, divrem_big7) {
510  // Yet another test for KnuthDiv rare step D6.
511  testDiv({224, "800000008000000200000005", 16},
512          {224, "fffffffd", 16},
513          {224, "80000000800000010000000f", 16});
514}
515
516TEST(APIntTest, fromString) {
517  EXPECT_EQ(APInt(32, 0), APInt(32,   "0", 2));
518  EXPECT_EQ(APInt(32, 1), APInt(32,   "1", 2));
519  EXPECT_EQ(APInt(32, 2), APInt(32,  "10", 2));
520  EXPECT_EQ(APInt(32, 3), APInt(32,  "11", 2));
521  EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2));
522
523  EXPECT_EQ(APInt(32, 0), APInt(32,   "+0", 2));
524  EXPECT_EQ(APInt(32, 1), APInt(32,   "+1", 2));
525  EXPECT_EQ(APInt(32, 2), APInt(32,  "+10", 2));
526  EXPECT_EQ(APInt(32, 3), APInt(32,  "+11", 2));
527  EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2));
528
529  EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32,   "-0", 2));
530  EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32,   "-1", 2));
531  EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32,  "-10", 2));
532  EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32,  "-11", 2));
533  EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2));
534
535
536  EXPECT_EQ(APInt(32,  0), APInt(32,  "0",  8));
537  EXPECT_EQ(APInt(32,  1), APInt(32,  "1",  8));
538  EXPECT_EQ(APInt(32,  7), APInt(32,  "7",  8));
539  EXPECT_EQ(APInt(32,  8), APInt(32,  "10", 8));
540  EXPECT_EQ(APInt(32, 15), APInt(32,  "17", 8));
541  EXPECT_EQ(APInt(32, 16), APInt(32,  "20", 8));
542
543  EXPECT_EQ(APInt(32,  +0), APInt(32,  "+0",  8));
544  EXPECT_EQ(APInt(32,  +1), APInt(32,  "+1",  8));
545  EXPECT_EQ(APInt(32,  +7), APInt(32,  "+7",  8));
546  EXPECT_EQ(APInt(32,  +8), APInt(32,  "+10", 8));
547  EXPECT_EQ(APInt(32, +15), APInt(32,  "+17", 8));
548  EXPECT_EQ(APInt(32, +16), APInt(32,  "+20", 8));
549
550  EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0",  8));
551  EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1",  8));
552  EXPECT_EQ(APInt(32,  uint64_t(-7LL)), APInt(32,  "-7",  8));
553  EXPECT_EQ(APInt(32,  uint64_t(-8LL)), APInt(32,  "-10", 8));
554  EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32,  "-17", 8));
555  EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32,  "-20", 8));
556
557
558  EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 10));
559  EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 10));
560  EXPECT_EQ(APInt(32,  9), APInt(32,  "9", 10));
561  EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10));
562  EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10));
563  EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10));
564
565  EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 10));
566  EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 10));
567  EXPECT_EQ(APInt(32,  uint64_t(-9LL)), APInt(32,  "-9", 10));
568  EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10));
569  EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10));
570  EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10));
571
572
573  EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 16));
574  EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 16));
575  EXPECT_EQ(APInt(32, 15), APInt(32,  "F", 16));
576  EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16));
577  EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16));
578  EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16));
579
580  EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 16));
581  EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 16));
582  EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32,  "-F", 16));
583  EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16));
584  EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16));
585  EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16));
586
587  EXPECT_EQ(APInt(32,  0), APInt(32,  "0", 36));
588  EXPECT_EQ(APInt(32,  1), APInt(32,  "1", 36));
589  EXPECT_EQ(APInt(32, 35), APInt(32,  "Z", 36));
590  EXPECT_EQ(APInt(32, 36), APInt(32, "10", 36));
591  EXPECT_EQ(APInt(32, 71), APInt(32, "1Z", 36));
592  EXPECT_EQ(APInt(32, 72), APInt(32, "20", 36));
593
594  EXPECT_EQ(APInt(32,  uint64_t(-0LL)), APInt(32,  "-0", 36));
595  EXPECT_EQ(APInt(32,  uint64_t(-1LL)), APInt(32,  "-1", 36));
596  EXPECT_EQ(APInt(32, uint64_t(-35LL)), APInt(32,  "-Z", 36));
597  EXPECT_EQ(APInt(32, uint64_t(-36LL)), APInt(32, "-10", 36));
598  EXPECT_EQ(APInt(32, uint64_t(-71LL)), APInt(32, "-1Z", 36));
599  EXPECT_EQ(APInt(32, uint64_t(-72LL)), APInt(32, "-20", 36));
600}
601
602TEST(APIntTest, FromArray) {
603  EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1)));
604}
605
606TEST(APIntTest, StringBitsNeeded2) {
607  EXPECT_EQ(1U, APInt::getBitsNeeded(  "0", 2));
608  EXPECT_EQ(1U, APInt::getBitsNeeded(  "1", 2));
609  EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2));
610  EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2));
611  EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2));
612
613  EXPECT_EQ(1U, APInt::getBitsNeeded(  "+0", 2));
614  EXPECT_EQ(1U, APInt::getBitsNeeded(  "+1", 2));
615  EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2));
616  EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2));
617  EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2));
618
619  EXPECT_EQ(2U, APInt::getBitsNeeded(  "-0", 2));
620  EXPECT_EQ(2U, APInt::getBitsNeeded(  "-1", 2));
621  EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2));
622  EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2));
623  EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2));
624}
625
626TEST(APIntTest, StringBitsNeeded8) {
627  EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8));
628  EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8));
629  EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8));
630  EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8));
631  EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8));
632
633  EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8));
634  EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8));
635  EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8));
636  EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8));
637  EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8));
638
639  EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8));
640  EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8));
641  EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8));
642  EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8));
643  EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8));
644}
645
646TEST(APIntTest, StringBitsNeeded10) {
647  EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10));
648  EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10));
649  EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10));
650  EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10));
651  EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10));
652  EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10));
653
654  EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10));
655  EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10));
656  EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10));
657  EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10));
658  EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10));
659
660  EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10));
661  EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10));
662  EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10));
663  EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10));
664  EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10));
665}
666
667TEST(APIntTest, StringBitsNeeded16) {
668  EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16));
669  EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16));
670  EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16));
671  EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16));
672  EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16));
673
674  EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16));
675  EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16));
676  EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16));
677  EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16));
678  EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16));
679
680  EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16));
681  EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16));
682  EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16));
683  EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16));
684  EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16));
685}
686
687TEST(APIntTest, toString) {
688  SmallString<16> S;
689  bool isSigned;
690
691  APInt(8, 0).toString(S, 2, true, true);
692  EXPECT_EQ(S.str().str(), "0b0");
693  S.clear();
694  APInt(8, 0).toString(S, 8, true, true);
695  EXPECT_EQ(S.str().str(), "00");
696  S.clear();
697  APInt(8, 0).toString(S, 10, true, true);
698  EXPECT_EQ(S.str().str(), "0");
699  S.clear();
700  APInt(8, 0).toString(S, 16, true, true);
701  EXPECT_EQ(S.str().str(), "0x0");
702  S.clear();
703  APInt(8, 0).toString(S, 36, true, false);
704  EXPECT_EQ(S.str().str(), "0");
705  S.clear();
706
707  isSigned = false;
708  APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
709  EXPECT_EQ(S.str().str(), "0b11111111");
710  S.clear();
711  APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
712  EXPECT_EQ(S.str().str(), "0377");
713  S.clear();
714  APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
715  EXPECT_EQ(S.str().str(), "255");
716  S.clear();
717  APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
718  EXPECT_EQ(S.str().str(), "0xFF");
719  S.clear();
720  APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
721  EXPECT_EQ(S.str().str(), "73");
722  S.clear();
723
724  isSigned = true;
725  APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
726  EXPECT_EQ(S.str().str(), "-0b1");
727  S.clear();
728  APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
729  EXPECT_EQ(S.str().str(), "-01");
730  S.clear();
731  APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
732  EXPECT_EQ(S.str().str(), "-1");
733  S.clear();
734  APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
735  EXPECT_EQ(S.str().str(), "-0x1");
736  S.clear();
737  APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
738  EXPECT_EQ(S.str().str(), "-1");
739  S.clear();
740}
741
742TEST(APIntTest, Log2) {
743  EXPECT_EQ(APInt(15, 7).logBase2(), 2U);
744  EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U);
745  EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1);
746  EXPECT_EQ(APInt(15, 8).logBase2(), 3U);
747  EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U);
748  EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3);
749  EXPECT_EQ(APInt(15, 9).logBase2(), 3U);
750  EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U);
751  EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1);
752}
753
754TEST(APIntTest, magic) {
755  EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16));
756  EXPECT_EQ(APInt(32, 3).magic().s, 0U);
757  EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16));
758  EXPECT_EQ(APInt(32, 5).magic().s, 1U);
759  EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16));
760  EXPECT_EQ(APInt(32, 7).magic().s, 2U);
761}
762
763TEST(APIntTest, magicu) {
764  EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16));
765  EXPECT_EQ(APInt(32, 3).magicu().s, 1U);
766  EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16));
767  EXPECT_EQ(APInt(32, 5).magicu().s, 2U);
768  EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16));
769  EXPECT_EQ(APInt(32, 7).magicu().s, 3U);
770  EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16));
771  EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U);
772}
773
774#ifdef GTEST_HAS_DEATH_TEST
775#ifndef NDEBUG
776TEST(APIntTest, StringDeath) {
777  EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small");
778  EXPECT_DEATH(APInt(32, "", 0), "Invalid string length");
779  EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, 16, or 36!");
780  EXPECT_DEATH(APInt(32, "", 10), "Invalid string length");
781  EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value.");
782  EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width");
783  EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length");
784  EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string");
785  EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string");
786}
787#endif
788#endif
789
790TEST(APIntTest, mul_clear) {
791  APInt ValA(65, -1ULL);
792  APInt ValB(65, 4);
793  APInt ValC(65, 0);
794  ValC = ValA * ValB;
795  ValA *= ValB;
796  EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false));
797}
798
799TEST(APIntTest, Rotate) {
800  EXPECT_EQ(APInt(8, 1),  APInt(8, 1).rotl(0));
801  EXPECT_EQ(APInt(8, 2),  APInt(8, 1).rotl(1));
802  EXPECT_EQ(APInt(8, 4),  APInt(8, 1).rotl(2));
803  EXPECT_EQ(APInt(8, 16), APInt(8, 1).rotl(4));
804  EXPECT_EQ(APInt(8, 1),  APInt(8, 1).rotl(8));
805
806  EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(0));
807  EXPECT_EQ(APInt(8, 32), APInt(8, 16).rotl(1));
808  EXPECT_EQ(APInt(8, 64), APInt(8, 16).rotl(2));
809  EXPECT_EQ(APInt(8, 1),  APInt(8, 16).rotl(4));
810  EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotl(8));
811
812  EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(0));
813  EXPECT_EQ(APInt(8, 8),  APInt(8, 16).rotr(1));
814  EXPECT_EQ(APInt(8, 4),  APInt(8, 16).rotr(2));
815  EXPECT_EQ(APInt(8, 1),  APInt(8, 16).rotr(4));
816  EXPECT_EQ(APInt(8, 16), APInt(8, 16).rotr(8));
817
818  EXPECT_EQ(APInt(8, 1),   APInt(8, 1).rotr(0));
819  EXPECT_EQ(APInt(8, 128), APInt(8, 1).rotr(1));
820  EXPECT_EQ(APInt(8, 64),  APInt(8, 1).rotr(2));
821  EXPECT_EQ(APInt(8, 16),  APInt(8, 1).rotr(4));
822  EXPECT_EQ(APInt(8, 1),   APInt(8, 1).rotr(8));
823
824  APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16);
825  APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16);
826  EXPECT_EQ(Rot, Big.rotr(144));
827}
828
829TEST(APIntTest, Splat) {
830  APInt ValA(8, 0x01);
831  EXPECT_EQ(ValA, APInt::getSplat(8, ValA));
832  EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA));
833
834  APInt ValB(3, 5);
835  EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB));
836  EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB));
837}
838
839TEST(APIntTest, tcDecrement) {
840  // Test single word decrement.
841
842  // No out borrow.
843  {
844    integerPart singleWord = ~integerPart(0) << (integerPartWidth - 1);
845    integerPart carry = APInt::tcDecrement(&singleWord, 1);
846    EXPECT_EQ(carry, integerPart(0));
847    EXPECT_EQ(singleWord, ~integerPart(0) >> 1);
848  }
849
850  // With out borrow.
851  {
852    integerPart singleWord = 0;
853    integerPart carry = APInt::tcDecrement(&singleWord, 1);
854    EXPECT_EQ(carry, integerPart(1));
855    EXPECT_EQ(singleWord, ~integerPart(0));
856  }
857
858  // Test multiword decrement.
859
860  // No across word borrow, no out borrow.
861  {
862    integerPart test[4] = {0x1, 0x1, 0x1, 0x1};
863    integerPart expected[4] = {0x0, 0x1, 0x1, 0x1};
864    APInt::tcDecrement(test, 4);
865    EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0);
866  }
867
868  // 1 across word borrow, no out borrow.
869  {
870    integerPart test[4] = {0x0, 0xF, 0x1, 0x1};
871    integerPart expected[4] = {~integerPart(0), 0xE, 0x1, 0x1};
872    integerPart carry = APInt::tcDecrement(test, 4);
873    EXPECT_EQ(carry, integerPart(0));
874    EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0);
875  }
876
877  // 2 across word borrow, no out borrow.
878  {
879    integerPart test[4] = {0x0, 0x0, 0xC, 0x1};
880    integerPart expected[4] = {~integerPart(0), ~integerPart(0), 0xB, 0x1};
881    integerPart carry = APInt::tcDecrement(test, 4);
882    EXPECT_EQ(carry, integerPart(0));
883    EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0);
884  }
885
886  // 3 across word borrow, no out borrow.
887  {
888    integerPart test[4] = {0x0, 0x0, 0x0, 0x1};
889    integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), 0x0};
890    integerPart carry = APInt::tcDecrement(test, 4);
891    EXPECT_EQ(carry, integerPart(0));
892    EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0);
893  }
894
895  // 3 across word borrow, with out borrow.
896  {
897    integerPart test[4] = {0x0, 0x0, 0x0, 0x0};
898    integerPart expected[4] = {~integerPart(0), ~integerPart(0), ~integerPart(0), ~integerPart(0)};
899    integerPart carry = APInt::tcDecrement(test, 4);
900    EXPECT_EQ(carry, integerPart(1));
901    EXPECT_EQ(APInt::tcCompare(test, expected, 4), 0);
902  }
903}
904
905TEST(APIntTest, arrayAccess) {
906  // Single word check.
907  uint64_t E1 = 0x2CA7F46BF6569915ULL;
908  APInt A1(64, E1);
909  for (unsigned i = 0, e = 64; i < e; ++i) {
910    EXPECT_EQ(bool(E1 & (1ULL << i)),
911              A1[i]);
912  }
913
914  // Multiword check.
915  integerPart E2[4] = {
916    0xEB6EB136591CBA21ULL,
917    0x7B9358BD6A33F10AULL,
918    0x7E7FFA5EADD8846ULL,
919    0x305F341CA00B613DULL
920  };
921  APInt A2(integerPartWidth*4, E2);
922  for (unsigned i = 0; i < 4; ++i) {
923    for (unsigned j = 0; j < integerPartWidth; ++j) {
924      EXPECT_EQ(bool(E2[i] & (1ULL << j)),
925                A2[i*integerPartWidth + j]);
926    }
927  }
928}
929
930TEST(APIntTest, LargeAPIntConstruction) {
931  // Check that we can properly construct very large APInt. It is very
932  // unlikely that people will ever do this, but it is a legal input,
933  // so we should not crash on it.
934  APInt A9(UINT32_MAX, 0);
935  EXPECT_FALSE(A9.getBoolValue());
936}
937
938TEST(APIntTest, nearestLogBase2) {
939  // Single word check.
940
941  // Test round up.
942  uint64_t I1 = 0x1800001;
943  APInt A1(64, I1);
944  EXPECT_EQ(A1.nearestLogBase2(), A1.ceilLogBase2());
945
946  // Test round down.
947  uint64_t I2 = 0x1000011;
948  APInt A2(64, I2);
949  EXPECT_EQ(A2.nearestLogBase2(), A2.logBase2());
950
951  // Test ties round up.
952  uint64_t I3 = 0x1800000;
953  APInt A3(64, I3);
954  EXPECT_EQ(A3.nearestLogBase2(), A3.ceilLogBase2());
955
956  // Multiple word check.
957
958  // Test round up.
959  integerPart I4[4] = {0x0, 0xF, 0x18, 0x0};
960  APInt A4(integerPartWidth*4, I4);
961  EXPECT_EQ(A4.nearestLogBase2(), A4.ceilLogBase2());
962
963  // Test round down.
964  integerPart I5[4] = {0x0, 0xF, 0x10, 0x0};
965  APInt A5(integerPartWidth*4, I5);
966  EXPECT_EQ(A5.nearestLogBase2(), A5.logBase2());
967
968  // Test ties round up.
969  uint64_t I6[4] = {0x0, 0x0, 0x0, 0x18};
970  APInt A6(integerPartWidth*4, I6);
971  EXPECT_EQ(A6.nearestLogBase2(), A6.ceilLogBase2());
972
973  // Test BitWidth == 1 special cases.
974  APInt A7(1, 1);
975  EXPECT_EQ(A7.nearestLogBase2(), 0ULL);
976  APInt A8(1, 0);
977  EXPECT_EQ(A8.nearestLogBase2(), UINT32_MAX);
978
979  // Test the zero case when we have a bit width large enough such
980  // that the bit width is larger than UINT32_MAX-1.
981  APInt A9(UINT32_MAX, 0);
982  EXPECT_EQ(A9.nearestLogBase2(), UINT32_MAX);
983}
984
985TEST(APIntTest, IsSplat) {
986  APInt A(32, 0x01010101);
987  EXPECT_FALSE(A.isSplat(1));
988  EXPECT_FALSE(A.isSplat(2));
989  EXPECT_FALSE(A.isSplat(4));
990  EXPECT_TRUE(A.isSplat(8));
991  EXPECT_TRUE(A.isSplat(16));
992  EXPECT_TRUE(A.isSplat(32));
993
994  APInt B(24, 0xAAAAAA);
995  EXPECT_FALSE(B.isSplat(1));
996  EXPECT_TRUE(B.isSplat(2));
997  EXPECT_TRUE(B.isSplat(4));
998  EXPECT_TRUE(B.isSplat(8));
999  EXPECT_TRUE(B.isSplat(24));
1000
1001  APInt C(24, 0xABAAAB);
1002  EXPECT_FALSE(C.isSplat(1));
1003  EXPECT_FALSE(C.isSplat(2));
1004  EXPECT_FALSE(C.isSplat(4));
1005  EXPECT_FALSE(C.isSplat(8));
1006  EXPECT_TRUE(C.isSplat(24));
1007
1008  APInt D(32, 0xABBAABBA);
1009  EXPECT_FALSE(D.isSplat(1));
1010  EXPECT_FALSE(D.isSplat(2));
1011  EXPECT_FALSE(D.isSplat(4));
1012  EXPECT_FALSE(D.isSplat(8));
1013  EXPECT_TRUE(D.isSplat(16));
1014  EXPECT_TRUE(D.isSplat(32));
1015
1016  APInt E(32, 0);
1017  EXPECT_TRUE(E.isSplat(1));
1018  EXPECT_TRUE(E.isSplat(2));
1019  EXPECT_TRUE(E.isSplat(4));
1020  EXPECT_TRUE(E.isSplat(8));
1021  EXPECT_TRUE(E.isSplat(16));
1022  EXPECT_TRUE(E.isSplat(32));
1023}
1024
1025TEST(APIntTest, isMask) {
1026  EXPECT_FALSE(APIntOps::isMask(APInt(32, 0x01010101)));
1027  EXPECT_FALSE(APIntOps::isMask(APInt(32, 0xf0000000)));
1028  EXPECT_FALSE(APIntOps::isMask(APInt(32, 0xffff0000)));
1029  EXPECT_FALSE(APIntOps::isMask(APInt(32, 0xff << 1)));
1030
1031  for (int N : { 1, 2, 3, 4, 7, 8, 16, 32, 64, 127, 128, 129, 256 }) {
1032    EXPECT_FALSE(APIntOps::isMask(APInt(N, 0)));
1033
1034    APInt One(N, 1);
1035    for (int I = 1; I <= N; ++I) {
1036      APInt MaskVal = One.shl(I) - 1;
1037      EXPECT_TRUE(APIntOps::isMask(MaskVal));
1038    }
1039  }
1040}
1041
1042#if defined(__clang__)
1043// Disable the pragma warning from versions of Clang without -Wself-move
1044#pragma clang diagnostic push
1045#pragma clang diagnostic ignored "-Wunknown-pragmas"
1046// Disable the warning that triggers on exactly what is being tested.
1047#pragma clang diagnostic push
1048#pragma clang diagnostic ignored "-Wself-move"
1049#endif
1050TEST(APIntTest, SelfMoveAssignment) {
1051  APInt X(32, 0xdeadbeef);
1052  X = std::move(X);
1053  EXPECT_EQ(32u, X.getBitWidth());
1054  EXPECT_EQ(0xdeadbeefULL, X.getLimitedValue());
1055
1056  uint64_t Bits[] = {0xdeadbeefdeadbeefULL, 0xdeadbeefdeadbeefULL};
1057  APInt Y(128, Bits);
1058  Y = std::move(Y);
1059  EXPECT_EQ(128u, Y.getBitWidth());
1060  EXPECT_EQ(~0ULL, Y.getLimitedValue());
1061  const uint64_t *Raw = Y.getRawData();
1062  EXPECT_EQ(2u, Y.getNumWords());
1063  EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[0]);
1064  EXPECT_EQ(0xdeadbeefdeadbeefULL, Raw[1]);
1065}
1066#if defined(__clang__)
1067#pragma clang diagnostic pop
1068#pragma clang diagnostic pop
1069#endif
1070}
1071
1072TEST(APIntTest, reverseBits) {
1073  EXPECT_EQ(1, APInt(1, 1).reverseBits());
1074  EXPECT_EQ(0, APInt(1, 0).reverseBits());
1075
1076  EXPECT_EQ(3, APInt(2, 3).reverseBits());
1077  EXPECT_EQ(3, APInt(2, 3).reverseBits());
1078
1079  EXPECT_EQ(0xb, APInt(4, 0xd).reverseBits());
1080  EXPECT_EQ(0xd, APInt(4, 0xb).reverseBits());
1081  EXPECT_EQ(0xf, APInt(4, 0xf).reverseBits());
1082
1083  EXPECT_EQ(0x30, APInt(7, 0x6).reverseBits());
1084  EXPECT_EQ(0x5a, APInt(7, 0x2d).reverseBits());
1085
1086  EXPECT_EQ(0x0f, APInt(8, 0xf0).reverseBits());
1087  EXPECT_EQ(0xf0, APInt(8, 0x0f).reverseBits());
1088
1089  EXPECT_EQ(0x0f0f, APInt(16, 0xf0f0).reverseBits());
1090  EXPECT_EQ(0xf0f0, APInt(16, 0x0f0f).reverseBits());
1091
1092  EXPECT_EQ(0x0f0f0f0f, APInt(32, 0xf0f0f0f0).reverseBits());
1093  EXPECT_EQ(0xf0f0f0f0, APInt(32, 0x0f0f0f0f).reverseBits());
1094
1095  EXPECT_EQ(0x402880a0 >> 1, APInt(31, 0x05011402).reverseBits());
1096
1097  EXPECT_EQ(0x0f0f0f0f, APInt(32, 0xf0f0f0f0).reverseBits());
1098  EXPECT_EQ(0xf0f0f0f0, APInt(32, 0x0f0f0f0f).reverseBits());
1099
1100  EXPECT_EQ(0x0f0f0f0f0f0f0f0f, APInt(64, 0xf0f0f0f0f0f0f0f0).reverseBits());
1101  EXPECT_EQ(0xf0f0f0f0f0f0f0f0, APInt(64, 0x0f0f0f0f0f0f0f0f).reverseBits());
1102
1103  for (unsigned N : { 1, 8, 16, 24, 31, 32, 33,
1104                      63, 64, 65, 127, 128, 257, 1024 }) {
1105    for (unsigned I = 0; I < N; ++I) {
1106      APInt X = APInt::getOneBitSet(N, I);
1107      APInt Y = APInt::getOneBitSet(N, N - (I + 1));
1108      EXPECT_EQ(Y, X.reverseBits());
1109      EXPECT_EQ(X, Y.reverseBits());
1110    }
1111  }
1112}
1113