master
1const ctz = @import("count0bits.zig");
2const testing = @import("std").testing;
3
4fn test__ctzsi2(a: u32, expected: i32) !void {
5 const x: i32 = @bitCast(a);
6 const result = ctz.__ctzsi2(x);
7 try testing.expectEqual(expected, result);
8}
9
10test "ctzsi2" {
11 try test__ctzsi2(0x00000001, 0);
12 try test__ctzsi2(0x00000002, 1);
13 try test__ctzsi2(0x00000003, 0);
14 try test__ctzsi2(0x00000004, 2);
15 try test__ctzsi2(0x00000005, 0);
16 try test__ctzsi2(0x00000006, 1);
17 try test__ctzsi2(0x00000007, 0);
18 try test__ctzsi2(0x00000008, 3);
19 try test__ctzsi2(0x00000009, 0);
20 try test__ctzsi2(0x0000000A, 1);
21 try test__ctzsi2(0x0000000B, 0);
22 try test__ctzsi2(0x0000000C, 2);
23 try test__ctzsi2(0x0000000D, 0);
24 try test__ctzsi2(0x0000000E, 1);
25 try test__ctzsi2(0x0000000F, 0);
26 try test__ctzsi2(0x00000010, 4);
27 try test__ctzsi2(0x00000011, 0);
28 try test__ctzsi2(0x00000012, 1);
29 try test__ctzsi2(0x00000013, 0);
30 try test__ctzsi2(0x00000014, 2);
31 try test__ctzsi2(0x00000015, 0);
32 try test__ctzsi2(0x00000016, 1);
33 try test__ctzsi2(0x00000017, 0);
34 try test__ctzsi2(0x00000018, 3);
35 try test__ctzsi2(0x00000019, 0);
36 try test__ctzsi2(0x0000001A, 1);
37 try test__ctzsi2(0x0000001B, 0);
38 try test__ctzsi2(0x0000001C, 2);
39 try test__ctzsi2(0x0000001D, 0);
40 try test__ctzsi2(0x0000001E, 1);
41 try test__ctzsi2(0x0000001F, 0);
42 try test__ctzsi2(0x00000020, 5);
43 try test__ctzsi2(0x00000021, 0);
44 try test__ctzsi2(0x00000022, 1);
45 try test__ctzsi2(0x00000023, 0);
46 try test__ctzsi2(0x00000024, 2);
47 try test__ctzsi2(0x00000025, 0);
48 try test__ctzsi2(0x00000026, 1);
49 try test__ctzsi2(0x00000027, 0);
50 try test__ctzsi2(0x00000028, 3);
51 try test__ctzsi2(0x00000029, 0);
52 try test__ctzsi2(0x0000002A, 1);
53 try test__ctzsi2(0x0000002B, 0);
54 try test__ctzsi2(0x0000002C, 2);
55 try test__ctzsi2(0x0000002D, 0);
56 try test__ctzsi2(0x0000002E, 1);
57 try test__ctzsi2(0x0000002F, 0);
58 try test__ctzsi2(0x00000030, 4);
59 try test__ctzsi2(0x00000031, 0);
60 try test__ctzsi2(0x00000032, 1);
61 try test__ctzsi2(0x00000033, 0);
62 try test__ctzsi2(0x00000034, 2);
63 try test__ctzsi2(0x00000035, 0);
64 try test__ctzsi2(0x00000036, 1);
65 try test__ctzsi2(0x00000037, 0);
66 try test__ctzsi2(0x00000038, 3);
67 try test__ctzsi2(0x00000039, 0);
68 try test__ctzsi2(0x0000003A, 1);
69 try test__ctzsi2(0x0000003B, 0);
70 try test__ctzsi2(0x0000003C, 2);
71 try test__ctzsi2(0x0000003D, 0);
72 try test__ctzsi2(0x0000003E, 1);
73 try test__ctzsi2(0x0000003F, 0);
74 try test__ctzsi2(0x00000040, 6);
75 try test__ctzsi2(0x00000041, 0);
76 try test__ctzsi2(0x00000042, 1);
77 try test__ctzsi2(0x00000043, 0);
78 try test__ctzsi2(0x00000044, 2);
79 try test__ctzsi2(0x00000045, 0);
80 try test__ctzsi2(0x00000046, 1);
81 try test__ctzsi2(0x00000047, 0);
82 try test__ctzsi2(0x00000048, 3);
83 try test__ctzsi2(0x00000049, 0);
84 try test__ctzsi2(0x0000004A, 1);
85 try test__ctzsi2(0x0000004B, 0);
86 try test__ctzsi2(0x0000004C, 2);
87 try test__ctzsi2(0x0000004D, 0);
88 try test__ctzsi2(0x0000004E, 1);
89 try test__ctzsi2(0x0000004F, 0);
90 try test__ctzsi2(0x00000050, 4);
91 try test__ctzsi2(0x00000051, 0);
92 try test__ctzsi2(0x00000052, 1);
93 try test__ctzsi2(0x00000053, 0);
94 try test__ctzsi2(0x00000054, 2);
95 try test__ctzsi2(0x00000055, 0);
96 try test__ctzsi2(0x00000056, 1);
97 try test__ctzsi2(0x00000057, 0);
98 try test__ctzsi2(0x00000058, 3);
99 try test__ctzsi2(0x00000059, 0);
100 try test__ctzsi2(0x0000005A, 1);
101 try test__ctzsi2(0x0000005B, 0);
102 try test__ctzsi2(0x0000005C, 2);
103 try test__ctzsi2(0x0000005D, 0);
104 try test__ctzsi2(0x0000005E, 1);
105 try test__ctzsi2(0x0000005F, 0);
106 try test__ctzsi2(0x00000060, 5);
107 try test__ctzsi2(0x00000061, 0);
108 try test__ctzsi2(0x00000062, 1);
109 try test__ctzsi2(0x00000063, 0);
110 try test__ctzsi2(0x00000064, 2);
111 try test__ctzsi2(0x00000065, 0);
112 try test__ctzsi2(0x00000066, 1);
113 try test__ctzsi2(0x00000067, 0);
114 try test__ctzsi2(0x00000068, 3);
115 try test__ctzsi2(0x00000069, 0);
116 try test__ctzsi2(0x0000006A, 1);
117 try test__ctzsi2(0x0000006B, 0);
118 try test__ctzsi2(0x0000006C, 2);
119 try test__ctzsi2(0x0000006D, 0);
120 try test__ctzsi2(0x0000006E, 1);
121 try test__ctzsi2(0x0000006F, 0);
122 try test__ctzsi2(0x00000070, 4);
123 try test__ctzsi2(0x00000071, 0);
124 try test__ctzsi2(0x00000072, 1);
125 try test__ctzsi2(0x00000073, 0);
126 try test__ctzsi2(0x00000074, 2);
127 try test__ctzsi2(0x00000075, 0);
128 try test__ctzsi2(0x00000076, 1);
129 try test__ctzsi2(0x00000077, 0);
130 try test__ctzsi2(0x00000078, 3);
131 try test__ctzsi2(0x00000079, 0);
132 try test__ctzsi2(0x0000007A, 1);
133 try test__ctzsi2(0x0000007B, 0);
134 try test__ctzsi2(0x0000007C, 2);
135 try test__ctzsi2(0x0000007D, 0);
136 try test__ctzsi2(0x0000007E, 1);
137 try test__ctzsi2(0x0000007F, 0);
138 try test__ctzsi2(0x00000080, 7);
139 try test__ctzsi2(0x00000081, 0);
140 try test__ctzsi2(0x00000082, 1);
141 try test__ctzsi2(0x00000083, 0);
142 try test__ctzsi2(0x00000084, 2);
143 try test__ctzsi2(0x00000085, 0);
144 try test__ctzsi2(0x00000086, 1);
145 try test__ctzsi2(0x00000087, 0);
146 try test__ctzsi2(0x00000088, 3);
147 try test__ctzsi2(0x00000089, 0);
148 try test__ctzsi2(0x0000008A, 1);
149 try test__ctzsi2(0x0000008B, 0);
150 try test__ctzsi2(0x0000008C, 2);
151 try test__ctzsi2(0x0000008D, 0);
152 try test__ctzsi2(0x0000008E, 1);
153 try test__ctzsi2(0x0000008F, 0);
154 try test__ctzsi2(0x00000090, 4);
155 try test__ctzsi2(0x00000091, 0);
156 try test__ctzsi2(0x00000092, 1);
157 try test__ctzsi2(0x00000093, 0);
158 try test__ctzsi2(0x00000094, 2);
159 try test__ctzsi2(0x00000095, 0);
160 try test__ctzsi2(0x00000096, 1);
161 try test__ctzsi2(0x00000097, 0);
162 try test__ctzsi2(0x00000098, 3);
163 try test__ctzsi2(0x00000099, 0);
164 try test__ctzsi2(0x0000009A, 1);
165 try test__ctzsi2(0x0000009B, 0);
166 try test__ctzsi2(0x0000009C, 2);
167 try test__ctzsi2(0x0000009D, 0);
168 try test__ctzsi2(0x0000009E, 1);
169 try test__ctzsi2(0x0000009F, 0);
170 try test__ctzsi2(0x000000A0, 5);
171 try test__ctzsi2(0x000000A1, 0);
172 try test__ctzsi2(0x000000A2, 1);
173 try test__ctzsi2(0x000000A3, 0);
174 try test__ctzsi2(0x000000A4, 2);
175 try test__ctzsi2(0x000000A5, 0);
176 try test__ctzsi2(0x000000A6, 1);
177 try test__ctzsi2(0x000000A7, 0);
178 try test__ctzsi2(0x000000A8, 3);
179 try test__ctzsi2(0x000000A9, 0);
180 try test__ctzsi2(0x000000AA, 1);
181 try test__ctzsi2(0x000000AB, 0);
182 try test__ctzsi2(0x000000AC, 2);
183 try test__ctzsi2(0x000000AD, 0);
184 try test__ctzsi2(0x000000AE, 1);
185 try test__ctzsi2(0x000000AF, 0);
186 try test__ctzsi2(0x000000B0, 4);
187 try test__ctzsi2(0x000000B1, 0);
188 try test__ctzsi2(0x000000B2, 1);
189 try test__ctzsi2(0x000000B3, 0);
190 try test__ctzsi2(0x000000B4, 2);
191 try test__ctzsi2(0x000000B5, 0);
192 try test__ctzsi2(0x000000B6, 1);
193 try test__ctzsi2(0x000000B7, 0);
194 try test__ctzsi2(0x000000B8, 3);
195 try test__ctzsi2(0x000000B9, 0);
196 try test__ctzsi2(0x000000BA, 1);
197 try test__ctzsi2(0x000000BB, 0);
198 try test__ctzsi2(0x000000BC, 2);
199 try test__ctzsi2(0x000000BD, 0);
200 try test__ctzsi2(0x000000BE, 1);
201 try test__ctzsi2(0x000000BF, 0);
202 try test__ctzsi2(0x000000C0, 6);
203 try test__ctzsi2(0x000000C1, 0);
204 try test__ctzsi2(0x000000C2, 1);
205 try test__ctzsi2(0x000000C3, 0);
206 try test__ctzsi2(0x000000C4, 2);
207 try test__ctzsi2(0x000000C5, 0);
208 try test__ctzsi2(0x000000C6, 1);
209 try test__ctzsi2(0x000000C7, 0);
210 try test__ctzsi2(0x000000C8, 3);
211 try test__ctzsi2(0x000000C9, 0);
212 try test__ctzsi2(0x000000CA, 1);
213 try test__ctzsi2(0x000000CB, 0);
214 try test__ctzsi2(0x000000CC, 2);
215 try test__ctzsi2(0x000000CD, 0);
216 try test__ctzsi2(0x000000CE, 1);
217 try test__ctzsi2(0x000000CF, 0);
218 try test__ctzsi2(0x000000D0, 4);
219 try test__ctzsi2(0x000000D1, 0);
220 try test__ctzsi2(0x000000D2, 1);
221 try test__ctzsi2(0x000000D3, 0);
222 try test__ctzsi2(0x000000D4, 2);
223 try test__ctzsi2(0x000000D5, 0);
224 try test__ctzsi2(0x000000D6, 1);
225 try test__ctzsi2(0x000000D7, 0);
226 try test__ctzsi2(0x000000D8, 3);
227 try test__ctzsi2(0x000000D9, 0);
228 try test__ctzsi2(0x000000DA, 1);
229 try test__ctzsi2(0x000000DB, 0);
230 try test__ctzsi2(0x000000DC, 2);
231 try test__ctzsi2(0x000000DD, 0);
232 try test__ctzsi2(0x000000DE, 1);
233 try test__ctzsi2(0x000000DF, 0);
234 try test__ctzsi2(0x000000E0, 5);
235 try test__ctzsi2(0x000000E1, 0);
236 try test__ctzsi2(0x000000E2, 1);
237 try test__ctzsi2(0x000000E3, 0);
238 try test__ctzsi2(0x000000E4, 2);
239 try test__ctzsi2(0x000000E5, 0);
240 try test__ctzsi2(0x000000E6, 1);
241 try test__ctzsi2(0x000000E7, 0);
242 try test__ctzsi2(0x000000E8, 3);
243 try test__ctzsi2(0x000000E9, 0);
244 try test__ctzsi2(0x000000EA, 1);
245 try test__ctzsi2(0x000000EB, 0);
246 try test__ctzsi2(0x000000EC, 2);
247 try test__ctzsi2(0x000000ED, 0);
248 try test__ctzsi2(0x000000EE, 1);
249 try test__ctzsi2(0x000000EF, 0);
250 try test__ctzsi2(0x000000F0, 4);
251 try test__ctzsi2(0x000000F1, 0);
252 try test__ctzsi2(0x000000F2, 1);
253 try test__ctzsi2(0x000000F3, 0);
254 try test__ctzsi2(0x000000F4, 2);
255 try test__ctzsi2(0x000000F5, 0);
256 try test__ctzsi2(0x000000F6, 1);
257 try test__ctzsi2(0x000000F7, 0);
258 try test__ctzsi2(0x000000F8, 3);
259 try test__ctzsi2(0x000000F9, 0);
260 try test__ctzsi2(0x000000FA, 1);
261 try test__ctzsi2(0x000000FB, 0);
262 try test__ctzsi2(0x000000FC, 2);
263 try test__ctzsi2(0x000000FD, 0);
264 try test__ctzsi2(0x000000FE, 1);
265 try test__ctzsi2(0x000000FF, 0);
266
267 try test__ctzsi2(0x00000000, 32);
268 try test__ctzsi2(0x80000000, 31);
269 try test__ctzsi2(0x40000000, 30);
270 try test__ctzsi2(0x20000000, 29);
271 try test__ctzsi2(0x10000000, 28);
272 try test__ctzsi2(0x08000000, 27);
273 try test__ctzsi2(0x04000000, 26);
274 try test__ctzsi2(0x02000000, 25);
275 try test__ctzsi2(0x01000000, 24);
276 try test__ctzsi2(0x00800000, 23);
277 try test__ctzsi2(0x00400000, 22);
278 try test__ctzsi2(0x00200000, 21);
279 try test__ctzsi2(0x00100000, 20);
280 try test__ctzsi2(0x00080000, 19);
281 try test__ctzsi2(0x00040000, 18);
282 try test__ctzsi2(0x00020000, 17);
283 try test__ctzsi2(0x00010000, 16);
284 try test__ctzsi2(0x00008000, 15);
285 try test__ctzsi2(0x00004000, 14);
286 try test__ctzsi2(0x00002000, 13);
287 try test__ctzsi2(0x00001000, 12);
288 try test__ctzsi2(0x00000800, 11);
289 try test__ctzsi2(0x00000400, 10);
290 try test__ctzsi2(0x00000200, 9);
291 try test__ctzsi2(0x00000100, 8);
292}