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 //===----------------------------------------------------------------------===//
11 #include "llvm/Support/raw_ostream.h"
12 #include "gtest/gtest.h"
13 #include "llvm/ADT/APInt.h"
14 #include "llvm/ADT/SmallString.h"
20 // Test that APInt shift left works when bitwidth > 64 and shiftamt == 0
21 TEST(APIntTest, ShiftLeftByZero) {
22 APInt One = APInt::getNullValue(65) + 1;
23 APInt Shl = One.shl(0);
24 EXPECT_EQ(true, Shl[0]);
25 EXPECT_EQ(false, Shl[1]);
28 TEST(APIntTest, i128_NegativeCount) {
29 APInt Minus3(128, static_cast<uint64_t>(-3), true);
30 EXPECT_EQ(126u, Minus3.countLeadingOnes());
31 EXPECT_EQ(-3, Minus3.getSExtValue());
33 APInt Minus1(128, static_cast<uint64_t>(-1), true);
34 EXPECT_EQ(0u, Minus1.countLeadingZeros());
35 EXPECT_EQ(128u, Minus1.countLeadingOnes());
36 EXPECT_EQ(128u, Minus1.getActiveBits());
37 EXPECT_EQ(0u, Minus1.countTrailingZeros());
38 EXPECT_EQ(128u, Minus1.countTrailingOnes());
39 EXPECT_EQ(128u, Minus1.countPopulation());
40 EXPECT_EQ(-1, Minus1.getSExtValue());
43 TEST(APIntTest, i33_Count) {
44 APInt i33minus2(33, static_cast<uint64_t>(-2), true);
45 EXPECT_EQ(0u, i33minus2.countLeadingZeros());
46 EXPECT_EQ(32u, i33minus2.countLeadingOnes());
47 EXPECT_EQ(33u, i33minus2.getActiveBits());
48 EXPECT_EQ(1u, i33minus2.countTrailingZeros());
49 EXPECT_EQ(32u, i33minus2.countPopulation());
50 EXPECT_EQ(-2, i33minus2.getSExtValue());
51 EXPECT_EQ(((uint64_t)-2)&((1ull<<33) -1), i33minus2.getZExtValue());
54 TEST(APIntTest, i65_Count) {
55 APInt i65minus(65, 0, true);
57 EXPECT_EQ(0u, i65minus.countLeadingZeros());
58 EXPECT_EQ(1u, i65minus.countLeadingOnes());
59 EXPECT_EQ(65u, i65minus.getActiveBits());
60 EXPECT_EQ(64u, i65minus.countTrailingZeros());
61 EXPECT_EQ(1u, i65minus.countPopulation());
64 TEST(APIntTest, i128_PositiveCount) {
65 APInt u128max = APInt::getAllOnesValue(128);
66 EXPECT_EQ(128u, u128max.countLeadingOnes());
67 EXPECT_EQ(0u, u128max.countLeadingZeros());
68 EXPECT_EQ(128u, u128max.getActiveBits());
69 EXPECT_EQ(0u, u128max.countTrailingZeros());
70 EXPECT_EQ(128u, u128max.countTrailingOnes());
71 EXPECT_EQ(128u, u128max.countPopulation());
73 APInt u64max(128, static_cast<uint64_t>(-1), false);
74 EXPECT_EQ(64u, u64max.countLeadingZeros());
75 EXPECT_EQ(0u, u64max.countLeadingOnes());
76 EXPECT_EQ(64u, u64max.getActiveBits());
77 EXPECT_EQ(0u, u64max.countTrailingZeros());
78 EXPECT_EQ(64u, u64max.countTrailingOnes());
79 EXPECT_EQ(64u, u64max.countPopulation());
80 EXPECT_EQ((uint64_t)~0ull, u64max.getZExtValue());
82 APInt zero(128, 0, true);
83 EXPECT_EQ(128u, zero.countLeadingZeros());
84 EXPECT_EQ(0u, zero.countLeadingOnes());
85 EXPECT_EQ(0u, zero.getActiveBits());
86 EXPECT_EQ(128u, zero.countTrailingZeros());
87 EXPECT_EQ(0u, zero.countTrailingOnes());
88 EXPECT_EQ(0u, zero.countPopulation());
89 EXPECT_EQ(0u, zero.getSExtValue());
90 EXPECT_EQ(0u, zero.getZExtValue());
92 APInt one(128, 1, true);
93 EXPECT_EQ(127u, one.countLeadingZeros());
94 EXPECT_EQ(0u, one.countLeadingOnes());
95 EXPECT_EQ(1u, one.getActiveBits());
96 EXPECT_EQ(0u, one.countTrailingZeros());
97 EXPECT_EQ(1u, one.countTrailingOnes());
98 EXPECT_EQ(1u, one.countPopulation());
99 EXPECT_EQ(1, one.getSExtValue());
100 EXPECT_EQ(1u, one.getZExtValue());
103 TEST(APIntTest, i1) {
104 const APInt neg_two(1, static_cast<uint64_t>(-2), true);
105 const APInt neg_one(1, static_cast<uint64_t>(-1), true);
106 const APInt zero(1, 0);
107 const APInt one(1, 1);
108 const APInt two(1, 2);
110 EXPECT_EQ(0, neg_two.getSExtValue());
111 EXPECT_EQ(-1, neg_one.getSExtValue());
112 EXPECT_EQ(1u, neg_one.getZExtValue());
113 EXPECT_EQ(0u, zero.getZExtValue());
114 EXPECT_EQ(-1, one.getSExtValue());
115 EXPECT_EQ(1u, one.getZExtValue());
116 EXPECT_EQ(0u, two.getZExtValue());
117 EXPECT_EQ(0, two.getSExtValue());
119 // Basic equalities for 1-bit values.
120 EXPECT_EQ(zero, two);
121 EXPECT_EQ(zero, neg_two);
122 EXPECT_EQ(one, neg_one);
123 EXPECT_EQ(two, neg_two);
126 EXPECT_EQ(two, one + one);
127 EXPECT_EQ(zero, neg_one + one);
128 EXPECT_EQ(neg_two, neg_one + neg_one);
131 EXPECT_EQ(neg_two, neg_one - one);
132 EXPECT_EQ(two, one - neg_one);
133 EXPECT_EQ(zero, one - one);
136 EXPECT_EQ(zero, one << one);
137 EXPECT_EQ(one, one << zero);
138 EXPECT_EQ(zero, one.shl(1));
139 EXPECT_EQ(one, one.shl(0));
140 EXPECT_EQ(zero, one.lshr(1));
141 EXPECT_EQ(zero, one.ashr(1));
144 EXPECT_EQ(neg_one, neg_one * one);
145 EXPECT_EQ(neg_one, one * neg_one);
146 EXPECT_EQ(one, neg_one * neg_one);
147 EXPECT_EQ(one, one * one);
150 EXPECT_EQ(neg_one, one.sdiv(neg_one));
151 EXPECT_EQ(neg_one, neg_one.sdiv(one));
152 EXPECT_EQ(one, neg_one.sdiv(neg_one));
153 EXPECT_EQ(one, one.sdiv(one));
155 EXPECT_EQ(neg_one, one.udiv(neg_one));
156 EXPECT_EQ(neg_one, neg_one.udiv(one));
157 EXPECT_EQ(one, neg_one.udiv(neg_one));
158 EXPECT_EQ(one, one.udiv(one));
161 EXPECT_EQ(zero, neg_one.srem(one));
162 EXPECT_EQ(zero, neg_one.urem(one));
163 EXPECT_EQ(zero, one.srem(neg_one));
166 TEST(APIntTest, fromString) {
167 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 2));
168 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 2));
169 EXPECT_EQ(APInt(32, 2), APInt(32, "10", 2));
170 EXPECT_EQ(APInt(32, 3), APInt(32, "11", 2));
171 EXPECT_EQ(APInt(32, 4), APInt(32, "100", 2));
173 EXPECT_EQ(APInt(32, 0), APInt(32, "+0", 2));
174 EXPECT_EQ(APInt(32, 1), APInt(32, "+1", 2));
175 EXPECT_EQ(APInt(32, 2), APInt(32, "+10", 2));
176 EXPECT_EQ(APInt(32, 3), APInt(32, "+11", 2));
177 EXPECT_EQ(APInt(32, 4), APInt(32, "+100", 2));
179 EXPECT_EQ(APInt(32, -0), APInt(32, "-0", 2));
180 EXPECT_EQ(APInt(32, -1), APInt(32, "-1", 2));
181 EXPECT_EQ(APInt(32, -2), APInt(32, "-10", 2));
182 EXPECT_EQ(APInt(32, -3), APInt(32, "-11", 2));
183 EXPECT_EQ(APInt(32, -4), APInt(32, "-100", 2));
186 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 8));
187 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 8));
188 EXPECT_EQ(APInt(32, 7), APInt(32, "7", 8));
189 EXPECT_EQ(APInt(32, 8), APInt(32, "10", 8));
190 EXPECT_EQ(APInt(32, 15), APInt(32, "17", 8));
191 EXPECT_EQ(APInt(32, 16), APInt(32, "20", 8));
193 EXPECT_EQ(APInt(32, +0), APInt(32, "+0", 8));
194 EXPECT_EQ(APInt(32, +1), APInt(32, "+1", 8));
195 EXPECT_EQ(APInt(32, +7), APInt(32, "+7", 8));
196 EXPECT_EQ(APInt(32, +8), APInt(32, "+10", 8));
197 EXPECT_EQ(APInt(32, +15), APInt(32, "+17", 8));
198 EXPECT_EQ(APInt(32, +16), APInt(32, "+20", 8));
200 EXPECT_EQ(APInt(32, -0), APInt(32, "-0", 8));
201 EXPECT_EQ(APInt(32, -1), APInt(32, "-1", 8));
202 EXPECT_EQ(APInt(32, -7), APInt(32, "-7", 8));
203 EXPECT_EQ(APInt(32, -8), APInt(32, "-10", 8));
204 EXPECT_EQ(APInt(32, -15), APInt(32, "-17", 8));
205 EXPECT_EQ(APInt(32, -16), APInt(32, "-20", 8));
208 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 10));
209 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 10));
210 EXPECT_EQ(APInt(32, 9), APInt(32, "9", 10));
211 EXPECT_EQ(APInt(32, 10), APInt(32, "10", 10));
212 EXPECT_EQ(APInt(32, 19), APInt(32, "19", 10));
213 EXPECT_EQ(APInt(32, 20), APInt(32, "20", 10));
215 EXPECT_EQ(APInt(32, -0), APInt(32, "-0", 10));
216 EXPECT_EQ(APInt(32, -1), APInt(32, "-1", 10));
217 EXPECT_EQ(APInt(32, -9), APInt(32, "-9", 10));
218 EXPECT_EQ(APInt(32, -10), APInt(32, "-10", 10));
219 EXPECT_EQ(APInt(32, -19), APInt(32, "-19", 10));
220 EXPECT_EQ(APInt(32, -20), APInt(32, "-20", 10));
223 EXPECT_EQ(APInt(32, 0), APInt(32, "0", 16));
224 EXPECT_EQ(APInt(32, 1), APInt(32, "1", 16));
225 EXPECT_EQ(APInt(32, 15), APInt(32, "F", 16));
226 EXPECT_EQ(APInt(32, 16), APInt(32, "10", 16));
227 EXPECT_EQ(APInt(32, 31), APInt(32, "1F", 16));
228 EXPECT_EQ(APInt(32, 32), APInt(32, "20", 16));
230 EXPECT_EQ(APInt(32, -0), APInt(32, "-0", 16));
231 EXPECT_EQ(APInt(32, -1), APInt(32, "-1", 16));
232 EXPECT_EQ(APInt(32, -15), APInt(32, "-F", 16));
233 EXPECT_EQ(APInt(32, -16), APInt(32, "-10", 16));
234 EXPECT_EQ(APInt(32, -31), APInt(32, "-1F", 16));
235 EXPECT_EQ(APInt(32, -32), APInt(32, "-20", 16));
238 #ifdef GTEST_HAS_DEATH_TEST
239 TEST(APIntTest, StringDeath) {
240 EXPECT_DEATH(APInt(0, "", 0), "Bitwidth too small");
241 EXPECT_DEATH(APInt(32, "", 0), "Invalid string length");
242 EXPECT_DEATH(APInt(32, "0", 0), "Radix should be 2, 8, 10, or 16!");
243 EXPECT_DEATH(APInt(32, "", 10), "Invalid string length");
244 EXPECT_DEATH(APInt(32, "-", 10), "string is only a minus!");
245 EXPECT_DEATH(APInt(1, "1234", 10), "Insufficient bit width");
246 EXPECT_DEATH(APInt(32, "\0", 10), "Invalid string length");
247 EXPECT_DEATH(APInt(32, StringRef("1\02", 3), 10), "Invalid character in digit string");
248 EXPECT_DEATH(APInt(32, "1L", 10), "Invalid character in digit string");