Meg's Mirrors

zig

1	const __modti3 = @import("udivmod.zig").__modti3;
2	const testing = @import("std").testing;
3
4	fn test__modti3(a: i128, b: i128, expected: i128) !void {
5	const x = __modti3(a, b);
6	try testing.expect(x == expected);
7	}
8
9	test "modti3" {
10	try test__modti3(0, 1, 0);
11	try test__modti3(0, -1, 0);
12	try test__modti3(5, 3, 2);
13	try test__modti3(5, -3, 2);
14	try test__modti3(-5, 3, -2);
15	try test__modti3(-5, -3, -2);
16
17	try test__modti3(0x8000000000000000, 1, 0x0);
18	try test__modti3(0x8000000000000000, -1, 0x0);
19	try test__modti3(0x8000000000000000, 2, 0x0);
20	try test__modti3(0x8000000000000000, -2, 0x0);
21	try test__modti3(0x8000000000000000, 3, 2);
22	try test__modti3(0x8000000000000000, -3, 2);
23
24	try test__modti3(make_ti(0x8000000000000000, 0), 1, 0x0);
25	try test__modti3(make_ti(0x8000000000000000, 0), -1, 0x0);
26	try test__modti3(make_ti(0x8000000000000000, 0), 2, 0x0);
27	try test__modti3(make_ti(0x8000000000000000, 0), -2, 0x0);
28	try test__modti3(make_ti(0x8000000000000000, 0), 3, -2);
29	try test__modti3(make_ti(0x8000000000000000, 0), -3, -2);
30	}
31
32	fn make_ti(high: u64, low: u64) i128 {
33	var result: u128 = high;
34	result <<= 64;
35	result |= low;
36	return @bitCast(result);
37	}