softfloat 1.0.0

use super::F32;

pub(crate) const fn trunc(x: F32) -> F32 {
    let mut i: u32 = x.to_bits();
    let mut e: i32 = (i >> 23 & 0xff) as i32 - 0x7f + 9;
    let m: u32;

    if e >= 23 + 9 {
        return x;
    }
    if e < 9 {
        e = 1;
    }
    m = -1i32 as u32 >> e;
    if (i & m) == 0 {
        return x;
    }
    i &= !m;
    F32::from_bits(i)
}

#[cfg(test)]
mod tests {
    #[test]
    fn sanity_check() {
        assert_eq!(super::trunc(f32!(1.1)), f32!(1.0));
    }
}