1use ark_ff::{fields::*, MontFp};
 2
 3use crate::*;
 4
 5pub type Fq2 = Fp2<Fq2Config>;
 6
 7pub struct Fq2Config;
 8
 9impl Fp2Config for Fq2Config {
10    type Fp = Fq;
11
12    /// NONRESIDUE = -1
13    const NONRESIDUE: Fq = MontFp!("-1");
14
15    /// Coefficients for the Frobenius automorphism.
16    const FROBENIUS_COEFF_FP2_C1: &'static [Fq] = &[
17        // Fq(-1)**(((q^0) - 1) / 2)
18        Fq::ONE,
19        // Fq(-1)**(((q^1) - 1) / 2)
20        MontFp!("-1"),
21    ];
22
23    #[inline(always)]
24    fn mul_fp_by_nonresidue_in_place(fp: &mut Self::Fp) -> &mut Self::Fp {
25        fp.neg_in_place()
26    }
27
28    #[inline(always)]
29    fn sub_and_mul_fp_by_nonresidue(y: &mut Self::Fp, x: &Self::Fp) {
30        *y += x;
31    }
32
33    #[inline(always)]
34    fn mul_fp_by_nonresidue_plus_one_and_add(y: &mut Self::Fp, x: &Self::Fp) {
35        *y = *x;
36    }
37
38    fn mul_fp_by_nonresidue_in_place_and_add(y: &mut Self::Fp, x: &Self::Fp) {
39        y.neg_in_place();
40        *y += x;
41    }
42}