?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
There's no need to be so picky about the particular register.
[llvm/stm8.git] / unittests / ADT / APIntTest.cpp
blob1f78cd33bdf18d37f6f3e737a696e69f8b6c79e5
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 <ostream>
11 #include "gtest/gtest.h"
12 #include "llvm/ADT/APInt.h"
13 #include "llvm/ADT/SmallString.h"
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 i65minus(65, 0, true);
60 i65minus.setBit(64);
61 EXPECT_EQ(0u, i65minus.countLeadingZeros());
62 EXPECT_EQ(1u, i65minus.countLeadingOnes());
63 EXPECT_EQ(65u, i65minus.getActiveBits());
64 EXPECT_EQ(64u, i65minus.countTrailingZeros());
65 EXPECT_EQ(1u, i65minus.countPopulation());
66 }
67
68 TEST(APIntTest, i128_PositiveCount) {
69 APInt u128max = APInt::getAllOnesValue(128);
70 EXPECT_EQ(128u, u128max.countLeadingOnes());
71 EXPECT_EQ(0u, u128max.countLeadingZeros());
72 EXPECT_EQ(128u, u128max.getActiveBits());
73 EXPECT_EQ(0u, u128max.countTrailingZeros());
74 EXPECT_EQ(128u, u128max.countTrailingOnes());
75 EXPECT_EQ(128u, u128max.countPopulation());
76
77 APInt u64max(128, static_cast<uint64_t>(-1), false);
78 EXPECT_EQ(64u, u64max.countLeadingZeros());
79 EXPECT_EQ(0u, u64max.countLeadingOnes());
80 EXPECT_EQ(64u, u64max.getActiveBits());
81 EXPECT_EQ(0u, u64max.countTrailingZeros());
82 EXPECT_EQ(64u, u64max.countTrailingOnes());
83 EXPECT_EQ(64u, u64max.countPopulation());
84 EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue());
85
86 APInt zero(128, 0, true);
87 EXPECT_EQ(128u, zero.countLeadingZeros());
88 EXPECT_EQ(0u, zero.countLeadingOnes());
89 EXPECT_EQ(0u, zero.getActiveBits());
90 EXPECT_EQ(128u, zero.countTrailingZeros());
91 EXPECT_EQ(0u, zero.countTrailingOnes());
92 EXPECT_EQ(0u, zero.countPopulation());
93 EXPECT_EQ(0u, zero.getSExtValue());
94 EXPECT_EQ(0u, zero.getZExtValue());
95
96 APInt one(128, 1, true);
97 EXPECT_EQ(127u, one.countLeadingZeros());
98 EXPECT_EQ(0u, one.countLeadingOnes());
99 EXPECT_EQ(1u, one.getActiveBits());
100 EXPECT_EQ(0u, one.countTrailingZeros());
101 EXPECT_EQ(1u, one.countTrailingOnes());
102 EXPECT_EQ(1u, one.countPopulation());
103 EXPECT_EQ(1, one.getSExtValue());
104 EXPECT_EQ(1u, one.getZExtValue());
105 }
106
107 TEST(APIntTest, i1) {
108 const APInt neg_two(1, static_cast<uint64_t>(-2), true);
109 const APInt neg_one(1, static_cast<uint64_t>(-1), true);
110 const APInt zero(1, 0);
111 const APInt one(1, 1);
112 const APInt two(1, 2);
113
114 EXPECT_EQ(0, neg_two.getSExtValue());
115 EXPECT_EQ(-1, neg_one.getSExtValue());
116 EXPECT_EQ(1u, neg_one.getZExtValue());
117 EXPECT_EQ(0u, zero.getZExtValue());
118 EXPECT_EQ(-1, one.getSExtValue());
119 EXPECT_EQ(1u, one.getZExtValue());
120 EXPECT_EQ(0u, two.getZExtValue());
121 EXPECT_EQ(0, two.getSExtValue());
122
123 // Basic equalities for 1-bit values.
124 EXPECT_EQ(zero, two);
125 EXPECT_EQ(zero, neg_two);
126 EXPECT_EQ(one, neg_one);
127 EXPECT_EQ(two, neg_two);
128
129 // Additions.
130 EXPECT_EQ(two, one + one);
131 EXPECT_EQ(zero, neg_one + one);
132 EXPECT_EQ(neg_two, neg_one + neg_one);
133
134 // Subtractions.
135 EXPECT_EQ(neg_two, neg_one - one);
136 EXPECT_EQ(two, one - neg_one);
137 EXPECT_EQ(zero, one - one);
138
139 // Shifts.
140 EXPECT_EQ(zero, one << one);
141 EXPECT_EQ(one, one << zero);
142 EXPECT_EQ(zero, one.shl(1));
143 EXPECT_EQ(one, one.shl(0));
144 EXPECT_EQ(zero, one.lshr(1));
145 EXPECT_EQ(zero, one.ashr(1));
146
147 // Multiplies.
148 EXPECT_EQ(neg_one, neg_one * one);
149 EXPECT_EQ(neg_one, one * neg_one);
150 EXPECT_EQ(one, neg_one * neg_one);
151 EXPECT_EQ(one, one * one);
152
153 // Divides.
154 EXPECT_EQ(neg_one, one.sdiv(neg_one));
155 EXPECT_EQ(neg_one, neg_one.sdiv(one));
156 EXPECT_EQ(one, neg_one.sdiv(neg_one));
157 EXPECT_EQ(one, one.sdiv(one));
158
159 EXPECT_EQ(neg_one, one.udiv(neg_one));
160 EXPECT_EQ(neg_one, neg_one.udiv(one));
161 EXPECT_EQ(one, neg_one.udiv(neg_one));
162 EXPECT_EQ(one, one.udiv(one));
163
164 // Remainders.
165 EXPECT_EQ(zero, neg_one.srem(one));
166 EXPECT_EQ(zero, neg_one.urem(one));
167 EXPECT_EQ(zero, one.srem(neg_one));
168 }
169
170 TEST(APIntTest, fromString) {
171 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2));
172 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2));
173 EXPECT_EQ(APInt(32, 2), APInt(32, "10", 2));
174 EXPECT_EQ(APInt(32, 3), APInt(32, "11", 2));
175 EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2));
176
177 EXPECT_EQ(APInt(32, 0), APInt(32, "+0", 2));
178 EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2));
179 EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2));
180 EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2));
181 EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2));
182
183 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 2));
184 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 2));
185 EXPECT_EQ(APInt(32, uint64_t(-2LL)), APInt(32, "-10", 2));
186 EXPECT_EQ(APInt(32, uint64_t(-3LL)), APInt(32, "-11", 2));
187 EXPECT_EQ(APInt(32, uint64_t(-4LL)), APInt(32, "-100", 2));
188
189
190 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8));
191 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8));
192 EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8));
193 EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8));
194 EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8));
195 EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8));
196
197 EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8));
198 EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8));
199 EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8));
200 EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8));
201 EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8));
202 EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8));
203
204 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 8));
205 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 8));
206 EXPECT_EQ(APInt(32, uint64_t(-7LL)), APInt(32, "-7", 8));
207 EXPECT_EQ(APInt(32, uint64_t(-8LL)), APInt(32, "-10", 8));
208 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-17", 8));
209 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-20", 8));
210
211
212 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10));
213 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10));
214 EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10));
215 EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10));
216 EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10));
217 EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10));
218
219 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 10));
220 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 10));
221 EXPECT_EQ(APInt(32, uint64_t(-9LL)), APInt(32, "-9", 10));
222 EXPECT_EQ(APInt(32, uint64_t(-10LL)), APInt(32, "-10", 10));
223 EXPECT_EQ(APInt(32, uint64_t(-19LL)), APInt(32, "-19", 10));
224 EXPECT_EQ(APInt(32, uint64_t(-20LL)), APInt(32, "-20", 10));
225
226
227 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16));
228 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16));
229 EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16));
230 EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16));
231 EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16));
232 EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16));
233
234 EXPECT_EQ(APInt(32, uint64_t(-0LL)), APInt(32, "-0", 16));
235 EXPECT_EQ(APInt(32, uint64_t(-1LL)), APInt(32, "-1", 16));
236 EXPECT_EQ(APInt(32, uint64_t(-15LL)), APInt(32, "-F", 16));
237 EXPECT_EQ(APInt(32, uint64_t(-16LL)), APInt(32, "-10", 16));
238 EXPECT_EQ(APInt(32, uint64_t(-31LL)), APInt(32, "-1F", 16));
239 EXPECT_EQ(APInt(32, uint64_t(-32LL)), APInt(32, "-20", 16));
240 }
241
242 TEST(APIntTest, StringBitsNeeded2) {
243 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 2));
244 EXPECT_EQ(1U, APInt::getBitsNeeded( "1", 2));
245 EXPECT_EQ(2U, APInt::getBitsNeeded( "10", 2));
246 EXPECT_EQ(2U, APInt::getBitsNeeded( "11", 2));
247 EXPECT_EQ(3U, APInt::getBitsNeeded("100", 2));
248
249 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 2));
250 EXPECT_EQ(1U, APInt::getBitsNeeded( "+1", 2));
251 EXPECT_EQ(2U, APInt::getBitsNeeded( "+10", 2));
252 EXPECT_EQ(2U, APInt::getBitsNeeded( "+11", 2));
253 EXPECT_EQ(3U, APInt::getBitsNeeded("+100", 2));
254
255 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 2));
256 EXPECT_EQ(2U, APInt::getBitsNeeded( "-1", 2));
257 EXPECT_EQ(3U, APInt::getBitsNeeded( "-10", 2));
258 EXPECT_EQ(3U, APInt::getBitsNeeded( "-11", 2));
259 EXPECT_EQ(4U, APInt::getBitsNeeded("-100", 2));
260 }
261
262 TEST(APIntTest, StringBitsNeeded8) {
263 EXPECT_EQ(3U, APInt::getBitsNeeded( "0", 8));
264 EXPECT_EQ(3U, APInt::getBitsNeeded( "7", 8));
265 EXPECT_EQ(6U, APInt::getBitsNeeded("10", 8));
266 EXPECT_EQ(6U, APInt::getBitsNeeded("17", 8));
267 EXPECT_EQ(6U, APInt::getBitsNeeded("20", 8));
268
269 EXPECT_EQ(3U, APInt::getBitsNeeded( "+0", 8));
270 EXPECT_EQ(3U, APInt::getBitsNeeded( "+7", 8));
271 EXPECT_EQ(6U, APInt::getBitsNeeded("+10", 8));
272 EXPECT_EQ(6U, APInt::getBitsNeeded("+17", 8));
273 EXPECT_EQ(6U, APInt::getBitsNeeded("+20", 8));
274
275 EXPECT_EQ(4U, APInt::getBitsNeeded( "-0", 8));
276 EXPECT_EQ(4U, APInt::getBitsNeeded( "-7", 8));
277 EXPECT_EQ(7U, APInt::getBitsNeeded("-10", 8));
278 EXPECT_EQ(7U, APInt::getBitsNeeded("-17", 8));
279 EXPECT_EQ(7U, APInt::getBitsNeeded("-20", 8));
280 }
281
282 TEST(APIntTest, StringBitsNeeded10) {
283 EXPECT_EQ(1U, APInt::getBitsNeeded( "0", 10));
284 EXPECT_EQ(2U, APInt::getBitsNeeded( "3", 10));
285 EXPECT_EQ(4U, APInt::getBitsNeeded( "9", 10));
286 EXPECT_EQ(4U, APInt::getBitsNeeded("10", 10));
287 EXPECT_EQ(5U, APInt::getBitsNeeded("19", 10));
288 EXPECT_EQ(5U, APInt::getBitsNeeded("20", 10));
289
290 EXPECT_EQ(1U, APInt::getBitsNeeded( "+0", 10));
291 EXPECT_EQ(4U, APInt::getBitsNeeded( "+9", 10));
292 EXPECT_EQ(4U, APInt::getBitsNeeded("+10", 10));
293 EXPECT_EQ(5U, APInt::getBitsNeeded("+19", 10));
294 EXPECT_EQ(5U, APInt::getBitsNeeded("+20", 10));
295
296 EXPECT_EQ(2U, APInt::getBitsNeeded( "-0", 10));
297 EXPECT_EQ(5U, APInt::getBitsNeeded( "-9", 10));
298 EXPECT_EQ(5U, APInt::getBitsNeeded("-10", 10));
299 EXPECT_EQ(6U, APInt::getBitsNeeded("-19", 10));
300 EXPECT_EQ(6U, APInt::getBitsNeeded("-20", 10));
301 }
302
303 TEST(APIntTest, StringBitsNeeded16) {
304 EXPECT_EQ(4U, APInt::getBitsNeeded( "0", 16));
305 EXPECT_EQ(4U, APInt::getBitsNeeded( "F", 16));
306 EXPECT_EQ(8U, APInt::getBitsNeeded("10", 16));
307 EXPECT_EQ(8U, APInt::getBitsNeeded("1F", 16));
308 EXPECT_EQ(8U, APInt::getBitsNeeded("20", 16));
309
310 EXPECT_EQ(4U, APInt::getBitsNeeded( "+0", 16));
311 EXPECT_EQ(4U, APInt::getBitsNeeded( "+F", 16));
312 EXPECT_EQ(8U, APInt::getBitsNeeded("+10", 16));
313 EXPECT_EQ(8U, APInt::getBitsNeeded("+1F", 16));
314 EXPECT_EQ(8U, APInt::getBitsNeeded("+20", 16));
315
316 EXPECT_EQ(5U, APInt::getBitsNeeded( "-0", 16));
317 EXPECT_EQ(5U, APInt::getBitsNeeded( "-F", 16));
318 EXPECT_EQ(9U, APInt::getBitsNeeded("-10", 16));
319 EXPECT_EQ(9U, APInt::getBitsNeeded("-1F", 16));
320 EXPECT_EQ(9U, APInt::getBitsNeeded("-20", 16));
321 }
322
323 TEST(APIntTest, toString) {
324 SmallString<16> S;
325 bool isSigned;
326
327 APInt(8, 0).toString(S, 2, true, true);
328 EXPECT_EQ(S.str().str(), "0b0");
329 S.clear();
330 APInt(8, 0).toString(S, 8, true, true);
331 EXPECT_EQ(S.str().str(), "00");
332 S.clear();
333 APInt(8, 0).toString(S, 10, true, true);
334 EXPECT_EQ(S.str().str(), "0");
335 S.clear();
336 APInt(8, 0).toString(S, 16, true, true);
337 EXPECT_EQ(S.str().str(), "0x0");
338 S.clear();
339
340 isSigned = false;
341 APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
342 EXPECT_EQ(S.str().str(), "0b11111111");
343 S.clear();
344 APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
345 EXPECT_EQ(S.str().str(), "0377");
346 S.clear();
347 APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
348 EXPECT_EQ(S.str().str(), "255");
349 S.clear();
350 APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
351 EXPECT_EQ(S.str().str(), "0xFF");
352 S.clear();
353
354 isSigned = true;
355 APInt(8, 255, isSigned).toString(S, 2, isSigned, true);
356 EXPECT_EQ(S.str().str(), "-0b1");
357 S.clear();
358 APInt(8, 255, isSigned).toString(S, 8, isSigned, true);
359 EXPECT_EQ(S.str().str(), "-01");
360 S.clear();
361 APInt(8, 255, isSigned).toString(S, 10, isSigned, true);
362 EXPECT_EQ(S.str().str(), "-1");
363 S.clear();
364 APInt(8, 255, isSigned).toString(S, 16, isSigned, true);
365 EXPECT_EQ(S.str().str(), "-0x1");
366 S.clear();
367 }
368
369 TEST(APIntTest, Log2) {
370 EXPECT_EQ(APInt(15, 7).logBase2(), 2U);
371 EXPECT_EQ(APInt(15, 7).ceilLogBase2(), 3U);
372 EXPECT_EQ(APInt(15, 7).exactLogBase2(), -1);
373 EXPECT_EQ(APInt(15, 8).logBase2(), 3U);
374 EXPECT_EQ(APInt(15, 8).ceilLogBase2(), 3U);
375 EXPECT_EQ(APInt(15, 8).exactLogBase2(), 3);
376 EXPECT_EQ(APInt(15, 9).logBase2(), 3U);
377 EXPECT_EQ(APInt(15, 9).ceilLogBase2(), 4U);
378 EXPECT_EQ(APInt(15, 9).exactLogBase2(), -1);
379 }
380
381 TEST(APIntTest, magic) {
382 EXPECT_EQ(APInt(32, 3).magic().m, APInt(32, "55555556", 16));
383 EXPECT_EQ(APInt(32, 3).magic().s, 0U);
384 EXPECT_EQ(APInt(32, 5).magic().m, APInt(32, "66666667", 16));
385 EXPECT_EQ(APInt(32, 5).magic().s, 1U);
386 EXPECT_EQ(APInt(32, 7).magic().m, APInt(32, "92492493", 16));
387 EXPECT_EQ(APInt(32, 7).magic().s, 2U);
388 }
389
390 TEST(APIntTest, magicu) {
391 EXPECT_EQ(APInt(32, 3).magicu().m, APInt(32, "AAAAAAAB", 16));
392 EXPECT_EQ(APInt(32, 3).magicu().s, 1U);
393 EXPECT_EQ(APInt(32, 5).magicu().m, APInt(32, "CCCCCCCD", 16));
394 EXPECT_EQ(APInt(32, 5).magicu().s, 2U);
395 EXPECT_EQ(APInt(32, 7).magicu().m, APInt(32, "24924925", 16));
396 EXPECT_EQ(APInt(32, 7).magicu().s, 3U);
397 EXPECT_EQ(APInt(64, 25).magicu(1).m, APInt(64, "A3D70A3D70A3D70B", 16));
398 EXPECT_EQ(APInt(64, 25).magicu(1).s, 4U);
399 }
400
401 #ifdef GTEST_HAS_DEATH_TEST
402 #ifndef NDEBUG
403 TEST(APIntTest, StringDeath) {
404 EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small");
405 EXPECT_DEATH(APInt(32, "", 0), "Invalid string length");
406 EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, or 16!");
407 EXPECT_DEATH(APInt(32, "", 10), "Invalid string length");
408 EXPECT_DEATH(APInt(32, "-", 10), "String is only a sign, needs a value.");
409 EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width");
410 EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length");
411 EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string");
412 EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string");
413 }
414 #endif
415 #endif
416
417 }
STM8 backend for LLVM