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Diffstat (limited to 'src/classlibnative/bcltype/bignum.h')
| -rw-r--r-- | src/classlibnative/bcltype/bignum.h | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/src/classlibnative/bcltype/bignum.h b/src/classlibnative/bcltype/bignum.h new file mode 100644 index 0000000000..0af7710d6e --- /dev/null +++ b/src/classlibnative/bcltype/bignum.h @@ -0,0 +1,152 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. +// +// File: bignum.h +// + +// + +#ifndef _BIGNUM_H_ +#define _BIGNUM_H_ + +#include <clrtypes.h> + +class BigNum +{ +public: + BigNum(); + BigNum(UINT32 value); + BigNum(UINT64 value); + ~BigNum(); + + BigNum & operator=(const BigNum &rhs); + + static UINT32 LogBase2(UINT32 val); + static UINT32 LogBase2(UINT64 val); + + static int Compare(const BigNum& lhs, const BigNum& rhs); + + static void ShiftLeft(UINT64 input, UINT32 shift, BigNum& output); + static void Pow10(int exp, BigNum& result); + static void PrepareHeuristicDivide(BigNum* pDividend, BigNum* divisor); + static UINT32 HeuristicDivide(BigNum* pDividend, const BigNum& divisor); + static void Multiply(const BigNum& lhs, UINT32 value, BigNum& result); + static void Multiply(const BigNum& lhs, const BigNum& rhs, BigNum& result); + + bool IsZero() const; + + void Multiply(UINT32 value); + void Multiply(const BigNum& value); + void Multiply10(); + void ShiftLeft(UINT32 shift); + void SetUInt32(UINT32 value); + void SetUInt64(UINT64 value); + void SetZero(); + void ExtendBlock(UINT32 blockValue); + void ExtendBlocks(UINT32 blockValue, UINT32 blockCount); + +private: + + static const UINT32 BIGSIZE = 35; + static const UINT32 UINT32POWER10NUM = 8; + static const UINT32 BIGPOWER10NUM = 6; + static constexpr UINT32 m_power10UInt32Table[UINT32POWER10NUM] = + { + 1, // 10^0 + 10, // 10^1 + 100, // 10^2 + 1000, // 10^3 + 10000, // 10^4 + 100000, // 10^5 + 1000000, // 10^6 + 10000000, // 10^7 + }; + static BigNum m_power10BigNumTable[BIGPOWER10NUM]; + + static class StaticInitializer + { + public: + StaticInitializer() + { + // 10^8 + m_power10BigNumTable[0].m_len = (UINT32)1; + m_power10BigNumTable[0].m_blocks[0] = (UINT32)100000000; + + // 10^16 + m_power10BigNumTable[1].m_len = (UINT32)2; + m_power10BigNumTable[1].m_blocks[0] = (UINT32)0x6fc10000; + m_power10BigNumTable[1].m_blocks[1] = (UINT32)0x002386f2; + + // 10^32 + m_power10BigNumTable[2].m_len = (UINT32)4; + m_power10BigNumTable[2].m_blocks[0] = (UINT32)0x00000000; + m_power10BigNumTable[2].m_blocks[1] = (UINT32)0x85acef81; + m_power10BigNumTable[2].m_blocks[2] = (UINT32)0x2d6d415b; + m_power10BigNumTable[2].m_blocks[3] = (UINT32)0x000004ee; + + // 10^64 + m_power10BigNumTable[3].m_len = (UINT32)7; + m_power10BigNumTable[3].m_blocks[0] = (UINT32)0x00000000; + m_power10BigNumTable[3].m_blocks[1] = (UINT32)0x00000000; + m_power10BigNumTable[3].m_blocks[2] = (UINT32)0xbf6a1f01; + m_power10BigNumTable[3].m_blocks[3] = (UINT32)0x6e38ed64; + m_power10BigNumTable[3].m_blocks[4] = (UINT32)0xdaa797ed; + m_power10BigNumTable[3].m_blocks[5] = (UINT32)0xe93ff9f4; + m_power10BigNumTable[3].m_blocks[6] = (UINT32)0x00184f03; + + // 10^128 + m_power10BigNumTable[4].m_len = (UINT32)14; + m_power10BigNumTable[4].m_blocks[0] = (UINT32)0x00000000; + m_power10BigNumTable[4].m_blocks[1] = (UINT32)0x00000000; + m_power10BigNumTable[4].m_blocks[2] = (UINT32)0x00000000; + m_power10BigNumTable[4].m_blocks[3] = (UINT32)0x00000000; + m_power10BigNumTable[4].m_blocks[4] = (UINT32)0x2e953e01; + m_power10BigNumTable[4].m_blocks[5] = (UINT32)0x03df9909; + m_power10BigNumTable[4].m_blocks[6] = (UINT32)0x0f1538fd; + m_power10BigNumTable[4].m_blocks[7] = (UINT32)0x2374e42f; + m_power10BigNumTable[4].m_blocks[8] = (UINT32)0xd3cff5ec; + m_power10BigNumTable[4].m_blocks[9] = (UINT32)0xc404dc08; + m_power10BigNumTable[4].m_blocks[10] = (UINT32)0xbccdb0da; + m_power10BigNumTable[4].m_blocks[11] = (UINT32)0xa6337f19; + m_power10BigNumTable[4].m_blocks[12] = (UINT32)0xe91f2603; + m_power10BigNumTable[4].m_blocks[13] = (UINT32)0x0000024e; + + // 10^256 + m_power10BigNumTable[5].m_len = (UINT32)27; + m_power10BigNumTable[5].m_blocks[0] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[1] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[2] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[3] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[4] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[5] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[6] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[7] = (UINT32)0x00000000; + m_power10BigNumTable[5].m_blocks[8] = (UINT32)0x982e7c01; + m_power10BigNumTable[5].m_blocks[9] = (UINT32)0xbed3875b; + m_power10BigNumTable[5].m_blocks[10] = (UINT32)0xd8d99f72; + m_power10BigNumTable[5].m_blocks[11] = (UINT32)0x12152f87; + m_power10BigNumTable[5].m_blocks[12] = (UINT32)0x6bde50c6; + m_power10BigNumTable[5].m_blocks[13] = (UINT32)0xcf4a6e70; + m_power10BigNumTable[5].m_blocks[14] = (UINT32)0xd595d80f; + m_power10BigNumTable[5].m_blocks[15] = (UINT32)0x26b2716e; + m_power10BigNumTable[5].m_blocks[16] = (UINT32)0xadc666b0; + m_power10BigNumTable[5].m_blocks[17] = (UINT32)0x1d153624; + m_power10BigNumTable[5].m_blocks[18] = (UINT32)0x3c42d35a; + m_power10BigNumTable[5].m_blocks[19] = (UINT32)0x63ff540e; + m_power10BigNumTable[5].m_blocks[20] = (UINT32)0xcc5573c0; + m_power10BigNumTable[5].m_blocks[21] = (UINT32)0x65f9ef17; + m_power10BigNumTable[5].m_blocks[22] = (UINT32)0x55bc28f2; + m_power10BigNumTable[5].m_blocks[23] = (UINT32)0x80dcc7f7; + m_power10BigNumTable[5].m_blocks[24] = (UINT32)0xf46eeddc; + m_power10BigNumTable[5].m_blocks[25] = (UINT32)0x5fdcefce; + m_power10BigNumTable[5].m_blocks[26] = (UINT32)0x000553f7; + } + } m_initializer; + + UINT32 m_blocks[BIGSIZE]; + UINT32 m_len; +}; + + +#endif |