floatToInt broken for const negative values of f128

[Laremere]

Zig Version

0.9.0

Steps to Reproduce

test "floatToInt" {
    const a: f128 = -2;
    var b = @floatToInt(i64, a);
    try expectEqual(@as(i64, -2), b);
}

Expected Behavior

The test to pass, as the f64 version does:

test "floatToInt" {
    const a: f64 = -2;
    var b = @floatToInt(i64, a);
    try expectEqual(@as(i64, -2), b);
}

or if the f128 isn't constant:

test "floatToInt" {
    var a: f128 = -2;
    var b = @floatToInt(i64, a);
    try expectEqual(@as(i64, -2), b);
}

Actual Behavior

error: integer value '-18446744073709551615' cannot be stored in type 'i64'
    const b = @floatToInt(i64, a);