zig/std/special/compiler_rt/fixunsdfdi_test.zig
Andrew Kelley 987768778a bit shifting safety
* add u3, u4, u5, u6, u7 and i3, i4, i5, i6, i7
 * shift operations shift amount parameter type is
   integer with log2 bit width of other param
   - This enforces not violating undefined behavior on
     shift amount >= bit width with the type system
 * clean up math.log, math.ln, math.log2, math.log10

closes #403
2017-08-19 01:43:43 -04:00

40 lines
1.2 KiB
Zig

const __fixunsdfdi = @import("fixunsdfdi.zig").__fixunsdfdi;
const assert = @import("../../debug.zig").assert;
fn test__fixunsdfdi(a: f64, expected: u64) {
const x = __fixunsdfdi(a);
assert(x == expected);
}
test "fixunsdfdi" {
//test__fixunsdfdi(0.0, 0);
//test__fixunsdfdi(0.5, 0);
//test__fixunsdfdi(0.99, 0);
test__fixunsdfdi(1.0, 1);
test__fixunsdfdi(1.5, 1);
test__fixunsdfdi(1.99, 1);
test__fixunsdfdi(2.0, 2);
test__fixunsdfdi(2.01, 2);
test__fixunsdfdi(-0.5, 0);
test__fixunsdfdi(-0.99, 0);
test__fixunsdfdi(-1.0, 0);
test__fixunsdfdi(-1.5, 0);
test__fixunsdfdi(-1.99, 0);
test__fixunsdfdi(-2.0, 0);
test__fixunsdfdi(-2.01, 0);
test__fixunsdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000);
test__fixunsdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000);
test__fixunsdfdi(-0x1.FFFFFEp+62, 0);
test__fixunsdfdi(-0x1.FFFFFCp+62, 0);
test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+63, 0xFFFFFFFFFFFFF800);
test__fixunsdfdi(0x1.0000000000000p+63, 0x8000000000000000);
test__fixunsdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00);
test__fixunsdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800);
test__fixunsdfdi(-0x1.FFFFFFFFFFFFFp+62, 0);
test__fixunsdfdi(-0x1.FFFFFFFFFFFFEp+62, 0);
}