softfloat 1.0.0

Pure software floating-point implementation, with `const` and `no_std` support
Documentation 
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use super::F32;

pub(crate) const fn round(x: F32) -> F32 {
    F32::trunc(x.add(F32::copysign(
        f32!(0.5).sub(f32!(0.25).mul(f32!(f32::EPSILON))),
        x,
    )))
}

#[cfg(test)]
mod tests {
    use super::F32;

    #[test]
    fn negative_zero() {
        assert_eq!(F32::round(f32!(-0.0)).to_bits(), f32!(-0.0).to_bits());
    }

    #[test]
    fn sanity_check() {
        assert_eq!((f32!(-1.0)).round(), f32!(-1.0));
        assert_eq!((f32!(2.8)).round(), f32!(3.0));
        assert_eq!((f32!(-0.5)).round(), f32!(-1.0));
        assert_eq!((f32!(0.5)).round(), f32!(1.0));
        assert_eq!((f32!(-1.5)).round(), f32!(-2.0));
        assert_eq!((f32!(1.5)).round(), f32!(2.0));
    }
}