/*

 * // Copyright (c) Radzivon Bartoshyk 7/2025. All rights reserved.

 * //

 * // Redistribution and use in source and binary forms, with or without modification,

 * // are permitted provided that the following conditions are met:

 * //

 * // 1.  Redistributions of source code must retain the above copyright notice, this

 * // list of conditions and the following disclaimer.

 * //

 * // 2.  Redistributions in binary form must reproduce the above copyright notice,

 * // this list of conditions and the following disclaimer in the documentation

 * // and/or other materials provided with the distribution.

 * //

 * // 3.  Neither the name of the copyright holder nor the names of its

 * // contributors may be used to endorse or promote products derived from

 * // this software without specific prior written permission.

 * //

 * // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

 * // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

 * // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

 * // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

 * // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

 * // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

 * // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

 * // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

use crate::double_double::DoubleDouble;

#[inline]

pub(crate) fn poly_dd_3(x: DoubleDouble, poly: [(u64, u64); 3], l: f64) -> DoubleDouble {

    let zch = poly[2];

    let ach = f64::from_bits(zch.0) + l;

    let acl = (f64::from_bits(zch.0) - ach) + l + f64::from_bits(zch.1);

    let mut ch = DoubleDouble::new(acl, ach);

    let zch = poly[1];

    ch = DoubleDouble::quick_mult(ch, x);

    let th = ch.hi + f64::from_bits(zch.0);

    let tl = (f64::from_bits(zch.0) - th) + ch.hi;

    ch.hi = th;

    ch.lo += tl + f64::from_bits(zch.1);

    let zch = poly[0];

    ch = DoubleDouble::quick_mult(ch, x);

    let th = ch.hi + f64::from_bits(zch.0);

    let tl = (f64::from_bits(zch.0) - th) + ch.hi;

    ch.hi = th;

    ch.lo += tl + f64::from_bits(zch.1);

    ch

}

#[inline]

pub(crate) fn poly_dekker_generic<const N: usize>(

    x: DoubleDouble,

    poly: [(u64, u64); N],

) -> DoubleDouble {

    let zch = poly.last().unwrap();

    let ach = f64::from_bits(zch.0);

    let acl = f64::from_bits(zch.1);

    let mut ch = DoubleDouble::new(acl, ach);

    for zch in poly.iter().rev().skip(1) {

        ch = DoubleDouble::quick_mult(ch, x);

        let th = ch.hi + f64::from_bits(zch.0);

        let tl = (f64::from_bits(zch.0) - th) + ch.hi;

        ch.hi = th;

        ch.lo += tl + f64::from_bits(zch.1);

    }

    ch

}

Unexecuted instantiation: pxfm::shared_eval::poly_dekker_generic::<32>

Unexecuted instantiation: pxfm::shared_eval::poly_dekker_generic::<7>