public void ModDiv(ref BigIntegerBuilder regDen, ref BigIntegerBuilder regQuo) { if (regDen._iuLast == 0) { regQuo.Set(DivMod(regDen._uSmall)); Py.Core.Util.Swap <BigIntegerBuilder>(ref this, ref regQuo); } else if (_iuLast != 0) { ModDivCore(ref this, ref regDen, true, ref regQuo); } }
private static void ModDivCore(ref BigIntegerBuilder regNum, ref BigIntegerBuilder regDen, bool fQuo, ref BigIntegerBuilder regQuo) { regQuo.Set((uint)0); if (regNum._iuLast >= regDen._iuLast) { int num = regDen._iuLast + 1; int num2 = regNum._iuLast - regDen._iuLast; int cu = num2; int index = regNum._iuLast; while (true) { if (index < num2) { cu++; break; } if (regDen._rgu[index - num2] != regNum._rgu[index]) { if (regDen._rgu[index - num2] < regNum._rgu[index]) { cu++; } break; } index--; } if (cu != 0) { if (fQuo) { regQuo.SetSizeLazy(cu); } uint u = regDen._rgu[num - 1]; uint num6 = regDen._rgu[num - 2]; int num7 = NumericsHelpers.CbitHighZero(u); int num8 = 0x20 - num7; if (num7 > 0) { u = (u << num7) | (num6 >> num8); num6 = num6 << num7; if (num > 2) { num6 |= regDen._rgu[num - 3] >> num8; } } regNum.EnsureWritable(); int num9 = cu; while (--num9 >= 0) { uint uHi = ((num9 + num) <= regNum._iuLast) ? regNum._rgu[num9 + num] : 0; ulong num11 = NumericsHelpers.MakeUlong(uHi, regNum._rgu[(num9 + num) - 1]); uint uLo = regNum._rgu[(num9 + num) - 2]; if (num7 > 0) { num11 = (num11 << num7) | (uLo >> num8); uLo = uLo << num7; if ((num9 + num) >= 3) { uLo |= regNum._rgu[(num9 + num) - 3] >> num8; } } ulong num13 = num11 / ((ulong)u); ulong num14 = (uint)(num11 % ((ulong)u)); if (num13 > 0xffffffffL) { num14 += u * (num13 - 0xffffffffL); num13 = 0xffffffffL; } while ((num14 <= 0xffffffffL) && ((num13 * num6) > NumericsHelpers.MakeUlong((uint)num14, uLo))) { num13 -= (ulong)1L; num14 += u; } if (num13 > 0L) { ulong num15 = 0L; for (int i = 0; i < num; i++) { num15 += regDen._rgu[i] * num13; uint num17 = (uint)num15; num15 = num15 >> 0x20; if (regNum._rgu[num9 + i] < num17) { num15 += (ulong)1L; } regNum._rgu[num9 + i] -= num17; } if (uHi < num15) { uint uCarry = 0; for (int j = 0; j < num; j++) { uCarry = AddCarry(ref regNum._rgu[num9 + j], regDen._rgu[j], uCarry); } num13 -= (ulong)1L; } regNum._iuLast = (num9 + num) - 1; } if (fQuo) { if (cu == 1) { regQuo._uSmall = (uint)num13; } else { regQuo._rgu[num9] = (uint)num13; } } } regNum._iuLast = num - 1; regNum.Trim(); } } }
private static void LehmerGcd(ref BigIntegerBuilder reg1, ref BigIntegerBuilder reg2) { int num; uint num2; int sign = 1; START: num = reg1._iuLast + 1; int b = reg2._iuLast + 1; if (num < b) { Py.Core.Util.Swap <BigIntegerBuilder>(ref reg1, ref reg2); Py.Core.Util.Swap <int>(ref num, ref b); } if (b == 1) { if (num == 1) { reg1._uSmall = NumericsHelpers.GCD(reg1._uSmall, reg2._uSmall); return; } if (reg2._uSmall != 0) { reg1.Set(NumericsHelpers.GCD(Mod(ref reg1, reg2._uSmall), reg2._uSmall)); } return; } if (num == 2) { reg1.Set(NumericsHelpers.GCD(reg1.GetHigh2(2), reg2.GetHigh2(2))); return; } if (b <= (num - 2)) { reg1.Mod(ref reg2); goto START; } ulong a = reg1.GetHigh2(num); ulong num6 = reg2.GetHigh2(num); int num7 = NumericsHelpers.CbitHighZero((ulong)(a | num6)); if (num7 > 0) { a = (a << num7) | (reg1._rgu[num - 3] >> (0x20 - num7)); num6 = (num6 << num7) | (reg2._rgu[num - 3] >> (0x20 - num7)); } if (a < num6) { Py.Core.Util.Swap <ulong>(ref a, ref num6); Py.Core.Util.Swap <BigIntegerBuilder>(ref reg1, ref reg2); } if ((a == ulong.MaxValue) || (num6 == ulong.MaxValue)) { a = a >> 1; num6 = num6 >> 1; } if (a == num6) { reg1.Sub(ref sign, ref reg2); goto START; } if (NumericsHelpers.GetHi(num6) == 0) { reg1.Mod(ref reg2); goto START; } uint num8 = 1; uint num9 = 0; uint num10 = 0; uint num11 = 1; Label_0162: num2 = 1; ulong num12 = a - num6; while ((num12 >= num6) && (num2 < 0x20)) { num12 -= num6; num2++; } if (num12 >= num6) { ulong num13 = a / num6; if (num13 > 0xffffffffL) { goto Label_02A3; } num2 = (uint)num13; num12 = a - (num2 * num6); } ulong num14 = num8 + (num2 * num10); ulong num15 = num9 + (num2 * num11); if (((num14 <= 0x7fffffffL) && (num15 <= 0x7fffffffL)) && ((num12 >= num15) && ((num12 + num14) <= (num6 - num10)))) { num8 = (uint)num14; num9 = (uint)num15; a = num12; if (a > num9) { num2 = 1; num12 = num6 - a; while ((num12 >= a) && (num2 < 0x20)) { num12 -= a; num2++; } if (num12 >= a) { ulong num16 = num6 / a; if (num16 > 0xffffffffL) { goto Label_02A3; } num2 = (uint)num16; num12 = num6 - (num2 * a); } num14 = num11 + (num2 * num9); num15 = num10 + (num2 * num8); if (((num14 <= 0x7fffffffL) && (num15 <= 0x7fffffffL)) && ((num12 >= num15) && ((num12 + num14) <= (a - num9)))) { num11 = (uint)num14; num10 = (uint)num15; num6 = num12; if (num6 > num10) { goto Label_0162; } } } } Label_02A3: if (num9 == 0) { if ((a / ((ulong)2L)) >= num6) { reg1.Mod(ref reg2); } else { reg1.Sub(ref sign, ref reg2); } } else { reg1.SetSizeKeep(b, 0); reg2.SetSizeKeep(b, 0); int num17 = 0; int num18 = 0; for (int i = 0; i < b; i++) { uint num20 = reg1._rgu[i]; uint num21 = reg2._rgu[i]; long num22 = ((num20 * num8) - (num21 * num9)) + num17; long num23 = ((num21 * num11) - (num20 * num10)) + num18; num17 = (int)(num22 >> 0x20); num18 = (int)(num23 >> 0x20); reg1._rgu[i] = (uint)num22; reg2._rgu[i] = (uint)num23; } reg1.Trim(); reg2.Trim(); } goto START; }