Spurious floattidf failures on mips

[rust-lang]

Spurious floattidf failures on mips

[est31]

Yup, I've got this in #161 as well, but lacked the discipline to open an issue :)

[mattico]

Here's the test:

static TEST_CASES: &[((i128,), u64)] = &[ /*...*/ ];

#[test]
fn floattidf() {
    for &((a,), b) in TEST_CASES {
        let b_ = __floattidf(a);
        let g_b = to_u64(b_);
        let diff = if g_b > b { g_b - b } else { b - g_b };
        assert_eq!(((a,), b, g_b, true), ((a,), b, g_b, diff <= 1));
    }
}

[AaronKutch]

This has been fixed by #397