1 //===- llvm/unittest/ADT/APInt.cpp - APInt unit tests ---------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/ADT/APInt.h"
11 #include "llvm/ADT/SmallString.h"
12 #include "gtest/gtest.h"
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);
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());
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());
42 // XFAIL this test on FreeBSD where the system gcc-4.2.1 seems to miscompile it.
43 #if defined(__llvm__) || !defined(__FreeBSD__)
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());
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());
67 APInt i65minus(65, 0, true);
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());
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());
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());
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());
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());
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);
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());
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);
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());
144 EXPECT_EQ(two, one + one);
145 EXPECT_EQ(zero, neg_one + one);
146 EXPECT_EQ(neg_two, neg_one + neg_one);
149 EXPECT_EQ(neg_two, neg_one - one);
150 EXPECT_EQ(two, one - neg_one);
151 EXPECT_EQ(zero, one - one);
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));
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));
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);
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));
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));
185 EXPECT_EQ(zero, neg_one.srem(one));
186 EXPECT_EQ(zero, neg_one.urem(one));
187 EXPECT_EQ(zero, one.srem(neg_one));
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);
203 APInt::sdivrem(nine, two, q, r);
206 APInt::sdivrem(-nine, two, q, r);
209 APInt::sdivrem(nine, -two, q, r);
212 APInt::sdivrem(-nine, -two, q, r);
218 TEST(APIntTest, compare) {
219 std::array<APInt, 5> testVals{{
223 APInt{16, (uint64_t)-1, true},
224 APInt{16, (uint64_t)-2, true},
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();
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));
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));
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));
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));
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
268 APInt::udivrem(p, a, q, r);
275 APInt::sdivrem(p, a, q, r);
279 if (b.ugt(c)) { // Test also symmetric case
284 APInt::udivrem(p, b, q, r);
291 APInt::sdivrem(p, b, q, r);
297 TEST(APIntTest, divrem_big1) {
298 // Tests KnuthDiv rare step D6
299 testDiv({256, "1ffffffffffffffff", 16},
300 {256, "1ffffffffffffffff", 16},
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},
318 TEST(APIntTest, divrem_big3) {
319 // Tests KnuthDiv case without shift
320 testDiv({256, "80000001ffffffffffffffff", 16},
321 {256, "ffffffffffffff0000000", 16},
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});
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
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});
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});
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));
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));
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));
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));
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));
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));
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));
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));
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));
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));
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));
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));
439 TEST(APIntTest, FromArray) {
440 EXPECT_EQ(APInt(32, uint64_t(1)), APInt(32, ArrayRef<uint64_t>(1)));
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));
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));
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));
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));
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));
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));
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));
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));
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));
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));
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));
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));
524 TEST(APIntTest, toString) {
528 APInt(8, 0).toString(S, 2, true, true);
529 EXPECT_EQ(S.str().str(), "0b0");
531 APInt(8, 0).toString(S, 8, true, true);
532 EXPECT_EQ(S.str().str(), "00");
534 APInt(8, 0).toString(S, 10, true, true);
535 EXPECT_EQ(S.str().str(), "0");
537 APInt(8, 0).toString(S, 16, true, true);
538 EXPECT_EQ(S.str().str(), "0x0");
540 APInt(8, 0).toString(S, 36, true, false);
541 EXPECT_EQ(S.str().str(), "0");
545 APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
546 EXPECT_EQ(S.str().str(), "0b11111111");
548 APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
549 EXPECT_EQ(S.str().str(), "0377");
551 APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
552 EXPECT_EQ(S.str().str(), "255");
554 APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
555 EXPECT_EQ(S.str().str(), "0xFF");
557 APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
558 EXPECT_EQ(S.str().str(), "73");
562 APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
563 EXPECT_EQ(S.str().str(), "-0b1");
565 APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
566 EXPECT_EQ(S.str().str(), "-01");
568 APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
569 EXPECT_EQ(S.str().str(), "-1");
571 APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
572 EXPECT_EQ(S.str().str(), "-0x1");
574 APInt(8, 255, isSigned).toString(S, 36, isSigned, false);
575 EXPECT_EQ(S.str().str(), "-1");
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);
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);
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);
611 #ifdef GTEST_HAS_DEATH_TEST
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");
627 TEST(APIntTest, mul_clear) {
628 APInt ValA(65, -1ULL);
633 EXPECT_EQ(ValA.toString(10, false), ValC.toString(10, false));
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));
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));
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));
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));
661 APInt Big(256, "00004000800000000000000000003fff8000000000000000", 16);
662 APInt Rot(256, "3fff80000000000000000000000000000000000040008000", 16);
663 EXPECT_EQ(Rot, Big.rotr(144));
666 TEST(APIntTest, Splat) {
668 EXPECT_EQ(ValA, APInt::getSplat(8, ValA));
669 EXPECT_EQ(APInt(64, 0x0101010101010101ULL), APInt::getSplat(64, ValA));
672 EXPECT_EQ(APInt(4, 0xD), APInt::getSplat(4, ValB));
673 EXPECT_EQ(APInt(15, 0xDB6D), APInt::getSplat(15, ValB));
676 TEST(APIntTest, tcDecrement) {
677 // Test single word decrement.
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);
689 integerPart singleWord = 0;
690 integerPart carry = APInt::tcDecrement(&singleWord, 1);
691 EXPECT_EQ(carry, integerPart(1));
692 EXPECT_EQ(singleWord, ~integerPart(0));
695 // Test multiword decrement.
697 // No across word borrow, no out borrow.
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);
705 // 1 across word borrow, no out borrow.
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);
714 // 2 across word borrow, no out borrow.
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);
723 // 3 across word borrow, no out borrow.
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);
732 // 3 across word borrow, with out borrow.
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);
742 TEST(APIntTest, arrayAccess) {
743 // Single word check.
744 uint64_t E1 = 0x2CA7F46BF6569915ULL;
746 for (unsigned i = 0, e = 64; i < e; ++i) {
747 EXPECT_EQ(bool(E1 & (1ULL << i)),
752 integerPart E2[4] = {
753 0xEB6EB136591CBA21ULL,
754 0x7B9358BD6A33F10AULL,
755 0x7E7FFA5EADD8846ULL,
756 0x305F341CA00B613DULL
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]);
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());
775 TEST(APIntTest, nearestLogBase2) {
776 // Single word check.
779 uint64_t I1 = 0x1800001;
781 EXPECT_EQ(A1.nearestLogBase2(), A1.ceilLogBase2());
784 uint64_t I2 = 0x1000011;
786 EXPECT_EQ(A2.nearestLogBase2(), A2.logBase2());
788 // Test ties round up.
789 uint64_t I3 = 0x1800000;
791 EXPECT_EQ(A3.nearestLogBase2(), A3.ceilLogBase2());
793 // Multiple word check.
796 integerPart I4[4] = {0x0, 0xF, 0x18, 0x0};
797 APInt A4(integerPartWidth*4, I4);
798 EXPECT_EQ(A4.nearestLogBase2(), A4.ceilLogBase2());
801 integerPart I5[4] = {0x0, 0xF, 0x10, 0x0};
802 APInt A5(integerPartWidth*4, I5);
803 EXPECT_EQ(A5.nearestLogBase2(), A5.logBase2());
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());
810 // Test BitWidth == 1 special cases.
812 EXPECT_EQ(A7.nearestLogBase2(), 0ULL);
814 EXPECT_EQ(A8.nearestLogBase2(), UINT32_MAX);
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);
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));
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));
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));
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));
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));
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"
870 TEST(APIntTest, SelfMoveAssignment) {
871 APInt X(32, 0xdeadbeef);
873 EXPECT_EQ(32u, X.getBitWidth());
874 EXPECT_EQ(0xdeadbeefULL, X.getLimitedValue());
876 uint64_t Bits[] = {0xdeadbeefdeadbeefULL, 0xdeadbeefdeadbeefULL};
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]);
886 #if defined(__clang__)
887 #pragma clang diagnostic pop
888 #pragma clang diagnostic pop