1const mulo = @import("mulo.zig");
2const testing = @import("std").testing;
3
4// ported from https://github.com/llvm-mirror/compiler-rt/tree/release_80/test/builtins/Unit
5
6fn test__mulosi4(a: i32, b: i32, expected: i32, expected_overflow: c_int) !void {
7 var overflow: c_int = undefined;
8 const x = mulo.__mulosi4(a, b, &overflow);
9 try testing.expect(overflow == expected_overflow and (expected_overflow != 0 or x == expected));
10}
11
12test "mulosi4" {
13 try test__mulosi4(0, 0, 0, 0);
14 try test__mulosi4(0, 1, 0, 0);
15 try test__mulosi4(1, 0, 0, 0);
16 try test__mulosi4(0, 10, 0, 0);
17 try test__mulosi4(10, 0, 0, 0);
18 try test__mulosi4(0, 0x1234567, 0, 0);
19 try test__mulosi4(0x1234567, 0, 0, 0);
20
21 try test__mulosi4(0, -1, 0, 0);
22 try test__mulosi4(-1, 0, 0, 0);
23 try test__mulosi4(0, -10, 0, 0);
24 try test__mulosi4(-10, 0, 0, 0);
25 try test__mulosi4(0, -0x1234567, 0, 0);
26 try test__mulosi4(-0x1234567, 0, 0, 0);
27
28 try test__mulosi4(1, 1, 1, 0);
29 try test__mulosi4(1, 10, 10, 0);
30 try test__mulosi4(10, 1, 10, 0);
31 try test__mulosi4(1, 0x1234567, 0x1234567, 0);
32 try test__mulosi4(0x1234567, 1, 0x1234567, 0);
33
34 try test__mulosi4(1, -1, -1, 0);
35 try test__mulosi4(1, -10, -10, 0);
36 try test__mulosi4(-10, 1, -10, 0);
37 try test__mulosi4(1, -0x1234567, -0x1234567, 0);
38 try test__mulosi4(-0x1234567, 1, -0x1234567, 0);
39
40 try test__mulosi4(0x7FFFFFFF, -2, @as(i32, @bitCast(@as(u32, 0x80000001))), 1);
41 try test__mulosi4(-2, 0x7FFFFFFF, @as(i32, @bitCast(@as(u32, 0x80000001))), 1);
42 try test__mulosi4(0x7FFFFFFF, -1, @as(i32, @bitCast(@as(u32, 0x80000001))), 0);
43 try test__mulosi4(-1, 0x7FFFFFFF, @as(i32, @bitCast(@as(u32, 0x80000001))), 0);
44 try test__mulosi4(0x7FFFFFFF, 0, 0, 0);
45 try test__mulosi4(0, 0x7FFFFFFF, 0, 0);
46 try test__mulosi4(0x7FFFFFFF, 1, 0x7FFFFFFF, 0);
47 try test__mulosi4(1, 0x7FFFFFFF, 0x7FFFFFFF, 0);
48 try test__mulosi4(0x7FFFFFFF, 2, @as(i32, @bitCast(@as(u32, 0x80000001))), 1);
49 try test__mulosi4(2, 0x7FFFFFFF, @as(i32, @bitCast(@as(u32, 0x80000001))), 1);
50
51 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000000))), -2, @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
52 try test__mulosi4(-2, @as(i32, @bitCast(@as(u32, 0x80000000))), @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
53 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000000))), -1, @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
54 try test__mulosi4(-1, @as(i32, @bitCast(@as(u32, 0x80000000))), @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
55 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000000))), 0, 0, 0);
56 try test__mulosi4(0, @as(i32, @bitCast(@as(u32, 0x80000000))), 0, 0);
57 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000000))), 1, @as(i32, @bitCast(@as(u32, 0x80000000))), 0);
58 try test__mulosi4(1, @as(i32, @bitCast(@as(u32, 0x80000000))), @as(i32, @bitCast(@as(u32, 0x80000000))), 0);
59 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000000))), 2, @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
60 try test__mulosi4(2, @as(i32, @bitCast(@as(u32, 0x80000000))), @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
61
62 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000001))), -2, @as(i32, @bitCast(@as(u32, 0x80000001))), 1);
63 try test__mulosi4(-2, @as(i32, @bitCast(@as(u32, 0x80000001))), @as(i32, @bitCast(@as(u32, 0x80000001))), 1);
64 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000001))), -1, 0x7FFFFFFF, 0);
65 try test__mulosi4(-1, @as(i32, @bitCast(@as(u32, 0x80000001))), 0x7FFFFFFF, 0);
66 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000001))), 0, 0, 0);
67 try test__mulosi4(0, @as(i32, @bitCast(@as(u32, 0x80000001))), 0, 0);
68 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000001))), 1, @as(i32, @bitCast(@as(u32, 0x80000001))), 0);
69 try test__mulosi4(1, @as(i32, @bitCast(@as(u32, 0x80000001))), @as(i32, @bitCast(@as(u32, 0x80000001))), 0);
70 try test__mulosi4(@as(i32, @bitCast(@as(u32, 0x80000001))), 2, @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
71 try test__mulosi4(2, @as(i32, @bitCast(@as(u32, 0x80000001))), @as(i32, @bitCast(@as(u32, 0x80000000))), 1);
72}