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mulosi4_test.zig (4141B) - Raw

      1 const mulo = @import("mulo.zig");
      2 const testing = @import("std").testing;
      3 
      4 // ported from https://github.com/llvm-mirror/compiler-rt/tree/release_80/test/builtins/Unit
      5 
      6 fn 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 
     12 test "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 }