const ffs = @import("count0bits.zig"); const testing = @import("std").testing; fn test__ffsdi2(a: u64, expected: i32) !void { const x = @as(i64, @bitCast(a)); const result = ffs.__ffsdi2(x); try testing.expectEqual(expected, result); } test "ffsdi2" { try test__ffsdi2(0x00000000_00000001, 1); try test__ffsdi2(0x00000000_00000002, 2); try test__ffsdi2(0x00000000_00000003, 1); try test__ffsdi2(0x00000000_00000004, 3); try test__ffsdi2(0x00000000_00000005, 1); try test__ffsdi2(0x00000000_00000006, 2); try test__ffsdi2(0x00000000_00000007, 1); try test__ffsdi2(0x00000000_00000008, 4); try test__ffsdi2(0x00000000_00000009, 1); try test__ffsdi2(0x00000000_0000000A, 2); try test__ffsdi2(0x00000000_0000000B, 1); try test__ffsdi2(0x00000000_0000000C, 3); try test__ffsdi2(0x00000000_0000000D, 1); try test__ffsdi2(0x00000000_0000000E, 2); try test__ffsdi2(0x00000000_0000000F, 1); try test__ffsdi2(0x00000000_00000010, 5); try test__ffsdi2(0x00000000_00000011, 1); try test__ffsdi2(0x00000000_00000012, 2); try test__ffsdi2(0x00000000_00000013, 1); try test__ffsdi2(0x00000000_00000014, 3); try test__ffsdi2(0x00000000_00000015, 1); try test__ffsdi2(0x00000000_00000016, 2); try test__ffsdi2(0x00000000_00000017, 1); try test__ffsdi2(0x00000000_00000018, 4); try test__ffsdi2(0x00000000_00000019, 1); try test__ffsdi2(0x00000000_0000001A, 2); try test__ffsdi2(0x00000000_0000001B, 1); try test__ffsdi2(0x00000000_0000001C, 3); try test__ffsdi2(0x00000000_0000001D, 1); try test__ffsdi2(0x00000000_0000001E, 2); try test__ffsdi2(0x00000000_0000001F, 1); try test__ffsdi2(0x00000000_00000020, 6); try test__ffsdi2(0x00000000_00000021, 1); try test__ffsdi2(0x00000000_00000022, 2); try test__ffsdi2(0x00000000_00000023, 1); try test__ffsdi2(0x00000000_00000024, 3); try test__ffsdi2(0x00000000_00000025, 1); try test__ffsdi2(0x00000000_00000026, 2); try test__ffsdi2(0x00000000_00000027, 1); try test__ffsdi2(0x00000000_00000028, 4); try test__ffsdi2(0x00000000_00000029, 1); try test__ffsdi2(0x00000000_0000002A, 2); try test__ffsdi2(0x00000000_0000002B, 1); try test__ffsdi2(0x00000000_0000002C, 3); try test__ffsdi2(0x00000000_0000002D, 1); try test__ffsdi2(0x00000000_0000002E, 2); try test__ffsdi2(0x00000000_0000002F, 1); try test__ffsdi2(0x00000000_00000030, 5); try test__ffsdi2(0x00000000_00000031, 1); try test__ffsdi2(0x00000000_00000032, 2); try test__ffsdi2(0x00000000_00000033, 1); try test__ffsdi2(0x00000000_00000034, 3); try test__ffsdi2(0x00000000_00000035, 1); try test__ffsdi2(0x00000000_00000036, 2); try test__ffsdi2(0x00000000_00000037, 1); try test__ffsdi2(0x00000000_00000038, 4); try test__ffsdi2(0x00000000_00000039, 1); try test__ffsdi2(0x00000000_0000003A, 2); try test__ffsdi2(0x00000000_0000003B, 1); try test__ffsdi2(0x00000000_0000003C, 3); try test__ffsdi2(0x00000000_0000003D, 1); try test__ffsdi2(0x00000000_0000003E, 2); try test__ffsdi2(0x00000000_0000003F, 1); try test__ffsdi2(0x00000000_00000040, 7); try test__ffsdi2(0x00000000_00000041, 1); try test__ffsdi2(0x00000000_00000042, 2); try test__ffsdi2(0x00000000_00000043, 1); try test__ffsdi2(0x00000000_00000044, 3); try test__ffsdi2(0x00000000_00000045, 1); try test__ffsdi2(0x00000000_00000046, 2); try test__ffsdi2(0x00000000_00000047, 1); try test__ffsdi2(0x00000000_00000048, 4); try test__ffsdi2(0x00000000_00000049, 1); try test__ffsdi2(0x00000000_0000004A, 2); try test__ffsdi2(0x00000000_0000004B, 1); try test__ffsdi2(0x00000000_0000004C, 3); try test__ffsdi2(0x00000000_0000004D, 1); try test__ffsdi2(0x00000000_0000004E, 2); try test__ffsdi2(0x00000000_0000004F, 1); try test__ffsdi2(0x00000000_00000050, 5); try test__ffsdi2(0x00000000_00000051, 1); try test__ffsdi2(0x00000000_00000052, 2); try test__ffsdi2(0x00000000_00000053, 1); try test__ffsdi2(0x00000000_00000054, 3); try test__ffsdi2(0x00000000_00000055, 1); try test__ffsdi2(0x00000000_00000056, 2); try test__ffsdi2(0x00000000_00000057, 1); try test__ffsdi2(0x00000000_00000058, 4); try test__ffsdi2(0x00000000_00000059, 1); try test__ffsdi2(0x00000000_0000005A, 2); try test__ffsdi2(0x00000000_0000005B, 1); try test__ffsdi2(0x00000000_0000005C, 3); try test__ffsdi2(0x00000000_0000005D, 1); try test__ffsdi2(0x00000000_0000005E, 2); try test__ffsdi2(0x00000000_0000005F, 1); try test__ffsdi2(0x00000000_00000060, 6); try test__ffsdi2(0x00000000_00000061, 1); try test__ffsdi2(0x00000000_00000062, 2); try test__ffsdi2(0x00000000_00000063, 1); try test__ffsdi2(0x00000000_00000064, 3); try test__ffsdi2(0x00000000_00000065, 1); try test__ffsdi2(0x00000000_00000066, 2); try test__ffsdi2(0x00000000_00000067, 1); try test__ffsdi2(0x00000000_00000068, 4); try test__ffsdi2(0x00000000_00000069, 1); try test__ffsdi2(0x00000000_0000006A, 2); try test__ffsdi2(0x00000000_0000006B, 1); try test__ffsdi2(0x00000000_0000006C, 3); try test__ffsdi2(0x00000000_0000006D, 1); try test__ffsdi2(0x00000000_0000006E, 2); try test__ffsdi2(0x00000000_0000006F, 1); try test__ffsdi2(0x00000000_00000070, 5); try test__ffsdi2(0x00000000_00000071, 1); try test__ffsdi2(0x00000000_00000072, 2); try test__ffsdi2(0x00000000_00000073, 1); try test__ffsdi2(0x00000000_00000074, 3); try test__ffsdi2(0x00000000_00000075, 1); try test__ffsdi2(0x00000000_00000076, 2); try test__ffsdi2(0x00000000_00000077, 1); try test__ffsdi2(0x00000000_00000078, 4); try test__ffsdi2(0x00000000_00000079, 1); try test__ffsdi2(0x00000000_0000007A, 2); try test__ffsdi2(0x00000000_0000007B, 1); try test__ffsdi2(0x00000000_0000007C, 3); try test__ffsdi2(0x00000000_0000007D, 1); try test__ffsdi2(0x00000000_0000007E, 2); try test__ffsdi2(0x00000000_0000007F, 1); try test__ffsdi2(0x00000000_00000080, 8); try test__ffsdi2(0x00000000_00000081, 1); try test__ffsdi2(0x00000000_00000082, 2); try test__ffsdi2(0x00000000_00000083, 1); try test__ffsdi2(0x00000000_00000084, 3); try test__ffsdi2(0x00000000_00000085, 1); try test__ffsdi2(0x00000000_00000086, 2); try test__ffsdi2(0x00000000_00000087, 1); try test__ffsdi2(0x00000000_00000088, 4); try test__ffsdi2(0x00000000_00000089, 1); try test__ffsdi2(0x00000000_0000008A, 2); try test__ffsdi2(0x00000000_0000008B, 1); try test__ffsdi2(0x00000000_0000008C, 3); try test__ffsdi2(0x00000000_0000008D, 1); try test__ffsdi2(0x00000000_0000008E, 2); try test__ffsdi2(0x00000000_0000008F, 1); try test__ffsdi2(0x00000000_00000090, 5); try test__ffsdi2(0x00000000_00000091, 1); try test__ffsdi2(0x00000000_00000092, 2); try test__ffsdi2(0x00000000_00000093, 1); try test__ffsdi2(0x00000000_00000094, 3); try test__ffsdi2(0x00000000_00000095, 1); try test__ffsdi2(0x00000000_00000096, 2); try test__ffsdi2(0x00000000_00000097, 1); try test__ffsdi2(0x00000000_00000098, 4); try test__ffsdi2(0x00000000_00000099, 1); try test__ffsdi2(0x00000000_0000009A, 2); try test__ffsdi2(0x00000000_0000009B, 1); try test__ffsdi2(0x00000000_0000009C, 3); try test__ffsdi2(0x00000000_0000009D, 1); try test__ffsdi2(0x00000000_0000009E, 2); try test__ffsdi2(0x00000000_0000009F, 1); try test__ffsdi2(0x00000000_000000A0, 6); try test__ffsdi2(0x00000000_000000A1, 1); try test__ffsdi2(0x00000000_000000A2, 2); try test__ffsdi2(0x00000000_000000A3, 1); try test__ffsdi2(0x00000000_000000A4, 3); try test__ffsdi2(0x00000000_000000A5, 1); try test__ffsdi2(0x00000000_000000A6, 2); try test__ffsdi2(0x00000000_000000A7, 1); try test__ffsdi2(0x00000000_000000A8, 4); try test__ffsdi2(0x00000000_000000A9, 1); try test__ffsdi2(0x00000000_000000AA, 2); try test__ffsdi2(0x00000000_000000AB, 1); try test__ffsdi2(0x00000000_000000AC, 3); try test__ffsdi2(0x00000000_000000AD, 1); try test__ffsdi2(0x00000000_000000AE, 2); try test__ffsdi2(0x00000000_000000AF, 1); try test__ffsdi2(0x00000000_000000B0, 5); try test__ffsdi2(0x00000000_000000B1, 1); try test__ffsdi2(0x00000000_000000B2, 2); try test__ffsdi2(0x00000000_000000B3, 1); try test__ffsdi2(0x00000000_000000B4, 3); try test__ffsdi2(0x00000000_000000B5, 1); try test__ffsdi2(0x00000000_000000B6, 2); try test__ffsdi2(0x00000000_000000B7, 1); try test__ffsdi2(0x00000000_000000B8, 4); try test__ffsdi2(0x00000000_000000B9, 1); try test__ffsdi2(0x00000000_000000BA, 2); try test__ffsdi2(0x00000000_000000BB, 1); try test__ffsdi2(0x00000000_000000BC, 3); try test__ffsdi2(0x00000000_000000BD, 1); try test__ffsdi2(0x00000000_000000BE, 2); try test__ffsdi2(0x00000000_000000BF, 1); try test__ffsdi2(0x00000000_000000C0, 7); try test__ffsdi2(0x00000000_000000C1, 1); try test__ffsdi2(0x00000000_000000C2, 2); try test__ffsdi2(0x00000000_000000C3, 1); try test__ffsdi2(0x00000000_000000C4, 3); try test__ffsdi2(0x00000000_000000C5, 1); try test__ffsdi2(0x00000000_000000C6, 2); try test__ffsdi2(0x00000000_000000C7, 1); try test__ffsdi2(0x00000000_000000C8, 4); try test__ffsdi2(0x00000000_000000C9, 1); try test__ffsdi2(0x00000000_000000CA, 2); try test__ffsdi2(0x00000000_000000CB, 1); try test__ffsdi2(0x00000000_000000CC, 3); try test__ffsdi2(0x00000000_000000CD, 1); try test__ffsdi2(0x00000000_000000CE, 2); try test__ffsdi2(0x00000000_000000CF, 1); try test__ffsdi2(0x00000000_000000D0, 5); try test__ffsdi2(0x00000000_000000D1, 1); try test__ffsdi2(0x00000000_000000D2, 2); try test__ffsdi2(0x00000000_000000D3, 1); try test__ffsdi2(0x00000000_000000D4, 3); try test__ffsdi2(0x00000000_000000D5, 1); try test__ffsdi2(0x00000000_000000D6, 2); try test__ffsdi2(0x00000000_000000D7, 1); try test__ffsdi2(0x00000000_000000D8, 4); try test__ffsdi2(0x00000000_000000D9, 1); try test__ffsdi2(0x00000000_000000DA, 2); try test__ffsdi2(0x00000000_000000DB, 1); try test__ffsdi2(0x00000000_000000DC, 3); try test__ffsdi2(0x00000000_000000DD, 1); try test__ffsdi2(0x00000000_000000DE, 2); try test__ffsdi2(0x00000000_000000DF, 1); try test__ffsdi2(0x00000000_000000E0, 6); try test__ffsdi2(0x00000000_000000E1, 1); try test__ffsdi2(0x00000000_000000E2, 2); try test__ffsdi2(0x00000000_000000E3, 1); try test__ffsdi2(0x00000000_000000E4, 3); try test__ffsdi2(0x00000000_000000E5, 1); try test__ffsdi2(0x00000000_000000E6, 2); try test__ffsdi2(0x00000000_000000E7, 1); try test__ffsdi2(0x00000000_000000E8, 4); try test__ffsdi2(0x00000000_000000E9, 1); try test__ffsdi2(0x00000000_000000EA, 2); try test__ffsdi2(0x00000000_000000EB, 1); try test__ffsdi2(0x00000000_000000EC, 3); try test__ffsdi2(0x00000000_000000ED, 1); try test__ffsdi2(0x00000000_000000EE, 2); try test__ffsdi2(0x00000000_000000EF, 1); try test__ffsdi2(0x00000000_000000F0, 5); try test__ffsdi2(0x00000000_000000F1, 1); try test__ffsdi2(0x00000000_000000F2, 2); try test__ffsdi2(0x00000000_000000F3, 1); try test__ffsdi2(0x00000000_000000F4, 3); try test__ffsdi2(0x00000000_000000F5, 1); try test__ffsdi2(0x00000000_000000F6, 2); try test__ffsdi2(0x00000000_000000F7, 1); try test__ffsdi2(0x00000000_000000F8, 4); try test__ffsdi2(0x00000000_000000F9, 1); try test__ffsdi2(0x00000000_000000FA, 2); try test__ffsdi2(0x00000000_000000FB, 1); try test__ffsdi2(0x00000000_000000FC, 3); try test__ffsdi2(0x00000000_000000FD, 1); try test__ffsdi2(0x00000000_000000FE, 2); try test__ffsdi2(0x00000000_000000FF, 1); try test__ffsdi2(0x00000000_00000000, 0); try test__ffsdi2(0x80000000_00000000, 64); try test__ffsdi2(0x40000000_00000000, 63); try test__ffsdi2(0x20000000_00000000, 62); try test__ffsdi2(0x10000000_00000000, 61); try test__ffsdi2(0x08000000_00000000, 60); try test__ffsdi2(0x04000000_00000000, 59); try test__ffsdi2(0x02000000_00000000, 58); try test__ffsdi2(0x01000000_00000000, 57); try test__ffsdi2(0x00800000_00000000, 56); try test__ffsdi2(0x00400000_00000000, 55); try test__ffsdi2(0x00200000_00000000, 54); try test__ffsdi2(0x00100000_00000000, 53); try test__ffsdi2(0x00080000_00000000, 52); try test__ffsdi2(0x00040000_00000000, 51); try test__ffsdi2(0x00020000_00000000, 50); try test__ffsdi2(0x00010000_00000000, 49); try test__ffsdi2(0x00008000_00000000, 48); try test__ffsdi2(0x00004000_00000000, 47); try test__ffsdi2(0x00002000_00000000, 46); try test__ffsdi2(0x00001000_00000000, 45); try test__ffsdi2(0x00000800_00000000, 44); try test__ffsdi2(0x00000400_00000000, 43); try test__ffsdi2(0x00000200_00000000, 42); try test__ffsdi2(0x00000100_00000000, 41); try test__ffsdi2(0x00000080_00000000, 40); try test__ffsdi2(0x00000040_00000000, 39); try test__ffsdi2(0x00000020_00000000, 38); try test__ffsdi2(0x00000010_00000000, 37); try test__ffsdi2(0x00000008_00000000, 36); try test__ffsdi2(0x00000004_00000000, 35); try test__ffsdi2(0x00000002_00000000, 34); try test__ffsdi2(0x00000001_00000000, 33); try test__ffsdi2(0x00000000_80000000, 32); try test__ffsdi2(0x00000000_40000000, 31); try test__ffsdi2(0x00000000_20000000, 30); try test__ffsdi2(0x00000000_10000000, 29); try test__ffsdi2(0x00000000_08000000, 28); try test__ffsdi2(0x00000000_04000000, 27); try test__ffsdi2(0x00000000_02000000, 26); try test__ffsdi2(0x00000000_01000000, 25); try test__ffsdi2(0x00000000_00800000, 24); try test__ffsdi2(0x00000000_00400000, 23); try test__ffsdi2(0x00000000_00200000, 22); try test__ffsdi2(0x00000000_00100000, 21); try test__ffsdi2(0x00000000_00080000, 20); try test__ffsdi2(0x00000000_00040000, 19); try test__ffsdi2(0x00000000_00020000, 18); try test__ffsdi2(0x00000000_00010000, 17); try test__ffsdi2(0x00000000_00008000, 16); try test__ffsdi2(0x00000000_00004000, 15); try test__ffsdi2(0x00000000_00002000, 14); try test__ffsdi2(0x00000000_00001000, 13); try test__ffsdi2(0x00000000_00000800, 12); try test__ffsdi2(0x00000000_00000400, 11); try test__ffsdi2(0x00000000_00000200, 10); try test__ffsdi2(0x00000000_00000100, 9); }