scReduce static method
Implementation
static void scReduce(List<int> r, List<int> s) {
BigInt s0 = _b2097151 & _load3(s, 0);
BigInt s1 = _b2097151 & (_load4(s, 2) >> 5);
BigInt s2 = _b2097151 & (_load3(s, 5) >> 2);
BigInt s3 = _b2097151 & (_load4(s, 7) >> 7);
BigInt s4 = _b2097151 & (_load4(s, 10) >> 4);
BigInt s5 = _b2097151 & (_load3(s, 13) >> 1);
BigInt s6 = _b2097151 & (_load4(s, 15) >> 6);
BigInt s7 = _b2097151 & (_load3(s, 18) >> 3);
BigInt s8 = _b2097151 & _load3(s, 21);
BigInt s9 = _b2097151 & (_load4(s, 23) >> 5);
BigInt s10 = _b2097151 & (_load3(s, 26) >> 2);
BigInt s11 = _b2097151 & (_load4(s, 28) >> 7);
BigInt s12 = _b2097151 & (_load4(s, 31) >> 4);
BigInt s13 = _b2097151 & (_load3(s, 34) >> 1);
BigInt s14 = _b2097151 & (_load4(s, 36) >> 6);
BigInt s15 = _b2097151 & (_load3(s, 39) >> 3);
BigInt s16 = _b2097151 & _load3(s, 42);
BigInt s17 = _b2097151 & (_load4(s, 44) >> 5);
BigInt s18 = _b2097151 & (_load3(s, 47) >> 2);
BigInt s19 = _b2097151 & (_load4(s, 49) >> 7);
BigInt s20 = _b2097151 & (_load4(s, 52) >> 4);
BigInt s21 = _b2097151 & (_load3(s, 55) >> 1);
BigInt s22 = _b2097151 & (_load4(s, 57) >> 6);
BigInt s23 = (_load4(s, 60) >> 3);
BigInt carry0;
BigInt carry1;
BigInt carry2;
BigInt carry3;
BigInt carry4;
BigInt carry5;
BigInt carry6;
BigInt carry7;
BigInt carry8;
BigInt carry9;
BigInt carry10;
BigInt carry11;
BigInt carry12;
BigInt carry13;
BigInt carry14;
BigInt carry15;
BigInt carry16;
s11 += s23 * 666643.toBigInt;
s12 += s23 * 470296.toBigInt;
s13 += s23 * 654183.toBigInt;
s14 -= s23 * 997805.toBigInt;
s15 += s23 * 136657.toBigInt;
s16 -= s23 * 683901.toBigInt;
s10 += s22 * 666643.toBigInt;
s11 += s22 * 470296.toBigInt;
s12 += s22 * 654183.toBigInt;
s13 -= s22 * 997805.toBigInt;
s14 += s22 * 136657.toBigInt;
s15 -= s22 * 683901.toBigInt;
s9 += s21 * 666643.toBigInt;
s10 += s21 * 470296.toBigInt;
s11 += s21 * 654183.toBigInt;
s12 -= s21 * 997805.toBigInt;
s13 += s21 * 136657.toBigInt;
s14 -= s21 * 683901.toBigInt;
s8 += s20 * 666643.toBigInt;
s9 += s20 * 470296.toBigInt;
s10 += s20 * 654183.toBigInt;
s11 -= s20 * 997805.toBigInt;
s12 += s20 * 136657.toBigInt;
s13 -= s20 * 683901.toBigInt;
s7 += s19 * 666643.toBigInt;
s8 += s19 * 470296.toBigInt;
s9 += s19 * 654183.toBigInt;
s10 -= s19 * 997805.toBigInt;
s11 += s19 * 136657.toBigInt;
s12 -= s19 * 683901.toBigInt;
s6 += s18 * 666643.toBigInt;
s7 += s18 * 470296.toBigInt;
s8 += s18 * 654183.toBigInt;
s9 -= s18 * 997805.toBigInt;
s10 += s18 * 136657.toBigInt;
s11 -= s18 * 683901.toBigInt;
carry6 = (s6 + (BigInt.one << 20)) >> 21;
s7 += carry6;
s6 -= carry6 << 21;
carry8 = (s8 + (BigInt.one << 20)) >> 21;
s9 += carry8;
s8 -= carry8 << 21;
carry10 = (s10 + (BigInt.one << 20)) >> 21;
s11 += carry10;
s10 -= carry10 << 21;
carry12 = (s12 + (BigInt.one << 20)) >> 21;
s13 += carry12;
s12 -= carry12 << 21;
carry14 = (s14 + (BigInt.one << 20)) >> 21;
s15 += carry14;
s14 -= carry14 << 21;
carry16 = (s16 + (BigInt.one << 20)) >> 21;
s17 += carry16;
s16 -= carry16 << 21;
carry7 = (s7 + (BigInt.one << 20)) >> 21;
s8 += carry7;
s7 -= carry7 << 21;
carry9 = (s9 + (BigInt.one << 20)) >> 21;
s10 += carry9;
s9 -= carry9 << 21;
carry11 = (s11 + (BigInt.one << 20)) >> 21;
s12 += carry11;
s11 -= carry11 << 21;
carry13 = (s13 + (BigInt.one << 20)) >> 21;
s14 += carry13;
s13 -= carry13 << 21;
carry15 = (s15 + (BigInt.one << 20)) >> 21;
s16 += carry15;
s15 -= carry15 << 21;
s5 += s17 * 666643.toBigInt;
s6 += s17 * 470296.toBigInt;
s7 += s17 * 654183.toBigInt;
s8 -= s17 * 997805.toBigInt;
s9 += s17 * 136657.toBigInt;
s10 -= s17 * 683901.toBigInt;
s4 += s16 * 666643.toBigInt;
s5 += s16 * 470296.toBigInt;
s6 += s16 * 654183.toBigInt;
s7 -= s16 * 997805.toBigInt;
s8 += s16 * 136657.toBigInt;
s9 -= s16 * 683901.toBigInt;
s3 += s15 * 666643.toBigInt;
s4 += s15 * 470296.toBigInt;
s5 += s15 * 654183.toBigInt;
s6 -= s15 * 997805.toBigInt;
s7 += s15 * 136657.toBigInt;
s8 -= s15 * 683901.toBigInt;
s2 += s14 * 666643.toBigInt;
s3 += s14 * 470296.toBigInt;
s4 += s14 * 654183.toBigInt;
s5 -= s14 * 997805.toBigInt;
s6 += s14 * 136657.toBigInt;
s7 -= s14 * 683901.toBigInt;
s1 += s13 * 666643.toBigInt;
s2 += s13 * 470296.toBigInt;
s3 += s13 * 654183.toBigInt;
s4 -= s13 * 997805.toBigInt;
s5 += s13 * 136657.toBigInt;
s6 -= s13 * 683901.toBigInt;
s0 += s12 * 666643.toBigInt;
s1 += s12 * 470296.toBigInt;
s2 += s12 * 654183.toBigInt;
s3 -= s12 * 997805.toBigInt;
s4 += s12 * 136657.toBigInt;
s5 -= s12 * 683901.toBigInt;
s12 = BigInt.zero;
carry0 = (s0 + (BigInt.one << 20)) >> 21;
s1 += carry0;
s0 -= carry0 << 21;
carry2 = (s2 + (BigInt.one << 20)) >> 21;
s3 += carry2;
s2 -= carry2 << 21;
carry4 = (s4 + (BigInt.one << 20)) >> 21;
s5 += carry4;
s4 -= carry4 << 21;
carry6 = (s6 + (BigInt.one << 20)) >> 21;
s7 += carry6;
s6 -= carry6 << 21;
carry8 = (s8 + (BigInt.one << 20)) >> 21;
s9 += carry8;
s8 -= carry8 << 21;
carry10 = (s10 + (BigInt.one << 20)) >> 21;
s11 += carry10;
s10 -= carry10 << 21;
carry1 = (s1 + (BigInt.one << 20)) >> 21;
s2 += carry1;
s1 -= carry1 << 21;
carry3 = (s3 + (BigInt.one << 20)) >> 21;
s4 += carry3;
s3 -= carry3 << 21;
carry5 = (s5 + (BigInt.one << 20)) >> 21;
s6 += carry5;
s5 -= carry5 << 21;
carry7 = (s7 + (BigInt.one << 20)) >> 21;
s8 += carry7;
s7 -= carry7 << 21;
carry9 = (s9 + (BigInt.one << 20)) >> 21;
s10 += carry9;
s9 -= carry9 << 21;
carry11 = (s11 + (BigInt.one << 20)) >> 21;
s12 += carry11;
s11 -= carry11 << 21;
s0 += s12 * 666643.toBigInt;
s1 += s12 * 470296.toBigInt;
s2 += s12 * 654183.toBigInt;
s3 -= s12 * 997805.toBigInt;
s4 += s12 * 136657.toBigInt;
s5 -= s12 * 683901.toBigInt;
s12 = BigInt.zero;
carry0 = s0 >> 21;
s1 += carry0;
s0 -= carry0 << 21;
carry1 = s1 >> 21;
s2 += carry1;
s1 -= carry1 << 21;
carry2 = s2 >> 21;
s3 += carry2;
s2 -= carry2 << 21;
carry3 = s3 >> 21;
s4 += carry3;
s3 -= carry3 << 21;
carry4 = s4 >> 21;
s5 += carry4;
s4 -= carry4 << 21;
carry5 = s5 >> 21;
s6 += carry5;
s5 -= carry5 << 21;
carry6 = s6 >> 21;
s7 += carry6;
s6 -= carry6 << 21;
carry7 = s7 >> 21;
s8 += carry7;
s7 -= carry7 << 21;
carry8 = s8 >> 21;
s9 += carry8;
s8 -= carry8 << 21;
carry9 = s9 >> 21;
s10 += carry9;
s9 -= carry9 << 21;
carry10 = s10 >> 21;
s11 += carry10;
s10 -= carry10 << 21;
carry11 = s11 >> 21;
s12 += carry11;
s11 -= carry11 << 21;
s0 += s12 * 666643.toBigInt;
s1 += s12 * 470296.toBigInt;
s2 += s12 * 654183.toBigInt;
s3 -= s12 * 997805.toBigInt;
s4 += s12 * 136657.toBigInt;
s5 -= s12 * 683901.toBigInt;
carry0 = s0 >> 21;
s1 += carry0;
s0 -= carry0 << 21;
carry1 = s1 >> 21;
s2 += carry1;
s1 -= carry1 << 21;
carry2 = s2 >> 21;
s3 += carry2;
s2 -= carry2 << 21;
carry3 = s3 >> 21;
s4 += carry3;
s3 -= carry3 << 21;
carry4 = s4 >> 21;
s5 += carry4;
s4 -= carry4 << 21;
carry5 = s5 >> 21;
s6 += carry5;
s5 -= carry5 << 21;
carry6 = s6 >> 21;
s7 += carry6;
s6 -= carry6 << 21;
carry7 = s7 >> 21;
s8 += carry7;
s7 -= carry7 << 21;
carry8 = s8 >> 21;
s9 += carry8;
s8 -= carry8 << 21;
carry9 = s9 >> 21;
s10 += carry9;
s9 -= carry9 << 21;
carry10 = s10 >> 21;
s11 += carry10;
s10 -= carry10 << 21;
final List<BigInt> sBig = List<BigInt>.filled(32, BigInt.zero);
sBig[0] = s0 >> 0;
sBig[1] = s0 >> 8;
sBig[2] = (s0 >> 16) | (s1 << 5);
sBig[3] = s1 >> 3;
sBig[4] = s1 >> 11;
sBig[5] = (s1 >> 19) | (s2 << 2);
sBig[6] = s2 >> 6;
sBig[7] = (s2 >> 14) | (s3 << 7);
sBig[8] = s3 >> 1;
sBig[9] = s3 >> 9;
sBig[10] = (s3 >> 17) | (s4 << 4);
sBig[11] = s4 >> 4;
sBig[12] = s4 >> 12;
sBig[13] = (s4 >> 20) | (s5 << 1);
sBig[14] = s5 >> 7;
sBig[15] = (s5 >> 15) | (s6 << 6);
sBig[16] = s6 >> 2;
sBig[17] = s6 >> 10;
sBig[18] = (s6 >> 18) | (s7 << 3);
sBig[19] = s7 >> 5;
sBig[20] = s7 >> 13;
sBig[21] = s8 >> 0;
sBig[22] = s8 >> 8;
sBig[23] = (s8 >> 16) | (s9 << 5);
sBig[24] = s9 >> 3;
sBig[25] = s9 >> 11;
sBig[26] = (s9 >> 19) | (s10 << 2);
sBig[27] = s10 >> 6;
sBig[28] = (s10 >> 14) | (s11 << 7);
sBig[29] = s11 >> 1;
sBig[30] = s11 >> 9;
sBig[31] = s11 >> 17;
for (int i = 0; i < sBig.length; i++) {
r[i] = sBig[i].toUnsignedInt8;
}
}
