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    use core::f32;

    const TOINT: f32 = 1.0 / f32::EPSILON;

    #[inline]
    #[cfg_attr(all(test, assert_no_panic), no_panic::no_panic)]
    pub fn roundf(mut x: f32) -> f32 {
        let i = x.to_bits();
        let e: u32 = i >> 23 & 0xff;
        let mut y: f32;

        if e >= 0x7f + 23 {
            return x;
        }
        if i >> 31 != 0 {
            x = -x;
        }
        if e < 0x7f - 1 {
            force_eval!(x + TOINT);
            return 0.0 * x;
        }
        y = x + TOINT - TOINT - x;
        if y > 0.5f32 {
            y = y + x - 1.0;
        } else if y <= -0.5f32 {
            y = y + x + 1.0;
        } else {
            y = y + x;
        }
        if i >> 31 != 0 {
            -y
        } else {
            y
        }
    }

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