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tcatm's cached SHA256 state idea, about 70% faster generating

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git-svn-id: https://bitcoin.svn.sourceforge.net/svnroot/bitcoin/trunk@113 1a98c847-1fd6-4fd8-948a-caf3550aa51b
pull/2/merge
s_nakamoto 14 years ago
parent 793200e5e9
commit 520f367319
1 changed files with 129 additions and 57 deletions
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128
main.cpp
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@ -2547,33 +2547,89 @@ int FormatHashBlocks(void* pbuffer, unsigned int len)
}
using CryptoPP::ByteReverse;
static int detectlittleendian = 1;
void BlockSHA256(const void* pin, unsigned int nBlocks, void* pout)
static const unsigned int pSHA256InitState[8] =
{0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19};
static const unsigned int SHA256_K[64] = {
0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,
0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,
0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,
0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,
0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,
0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,
0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,
0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,
0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,
0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,
0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,
0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,
0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,
0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,
0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,
0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2
};
#define blk0(i) (W[i] = dat[i])
#define blk2(i) (W[i&15]+=s1(W[(i-2)&15])+W[(i-7)&15]+s0(W[(i-15)&15]))
#define Ch(x,y,z) (z^(x&(y^z)))
#define Maj(x,y,z) ((x&y)|(z&(x|y)))
#define a(i) T[(0-i)&7]
#define b(i) T[(1-i)&7]
#define c(i) T[(2-i)&7]
#define d(i) T[(3-i)&7]
#define e(i) T[(4-i)&7]
#define f(i) T[(5-i)&7]
#define g(i) T[(6-i)&7]
#define h(i) T[(7-i)&7]
#define R(i,j) h(i)+=S1(e(i))+Ch(e(i),f(i),g(i))+SHA256_K[i+j]+(j?blk2(i):blk0(i));\
d(i)+=h(i);h(i)+=S0(a(i))+Maj(a(i),b(i),c(i))
#define rotrFixed(x,y) ((x>>y) | (x<<(sizeof(unsigned int)*8-y)))
// for SHA256
#define S0(x) (rotrFixed(x,2)^rotrFixed(x,13)^rotrFixed(x,22))
#define S1(x) (rotrFixed(x,6)^rotrFixed(x,11)^rotrFixed(x,25))
#define s0(x) (rotrFixed(x,7)^rotrFixed(x,18)^(x>>3))
#define s1(x) (rotrFixed(x,17)^rotrFixed(x,19)^(x>>10))
#if 1
inline void SHA256Transform(void* pout, const void* pin, const void* pinit)
{
unsigned int* pinput = (unsigned int*)pin;
unsigned int* pstate = (unsigned int*)pout;
memcpy(pout, pinit, 32);
unsigned int* dat = (unsigned int*)pin;
unsigned int* T = (unsigned int*)pout;
unsigned int* initstate = (unsigned int*)pinit;
unsigned int W[16];
R( 0, 0); R( 1, 0); R( 2, 0); R( 3, 0); R( 4, 0); R( 5, 0); R( 6, 0); R( 7, 0); R( 8, 0); R( 9, 0); R(10, 0); R(11, 0); R(12, 0); R(13, 0); R(14, 0); R(15, 0);
R( 0, 16); R( 1, 16); R( 2, 16); R( 3, 16); R( 4, 16); R( 5, 16); R( 6, 16); R( 7, 16); R( 8, 16); R( 9, 16); R(10, 16); R(11, 16); R(12, 16); R(13, 16); R(14, 16); R(15, 16);
R( 0, 32); R( 1, 32); R( 2, 32); R( 3, 32); R( 4, 32); R( 5, 32); R( 6, 32); R( 7, 32); R( 8, 32); R( 9, 32); R(10, 32); R(11, 32); R(12, 32); R(13, 32); R(14, 32); R(15, 32);
R( 0, 48); R( 1, 48); R( 2, 48); R( 3, 48); R( 4, 48); R( 5, 48); R( 6, 48); R( 7, 48); R( 8, 48); R( 9, 48); R(10, 48); R(11, 48); R(12, 48); R(13, 48); R(14, 48); R(15, 48);
T[0] += initstate[0];
T[1] += initstate[1];
T[2] += initstate[2];
T[3] += initstate[3];
T[4] += initstate[4];
T[5] += initstate[5];
T[6] += initstate[6];
T[7] += initstate[7];
}
#else
inline void SHA256Transform(void* pstate, void* pinput, const void* pinit)
{
memcpy(pstate, pinit, 32);
CryptoPP::SHA256::Transform((CryptoPP::word32*)pstate, (CryptoPP::word32*)pinput);
}
#endif
CryptoPP::SHA256::InitState(pstate);
if (*(char*)&detectlittleendian != 0)
{
for (int n = 0; n < nBlocks; n++)
{
unsigned int pbuf[16];
for (int i = 0; i < 16; i++)
pbuf[i] = ByteReverse(pinput[n * 16 + i]);
CryptoPP::SHA256::Transform(pstate, pbuf);
}
for (int i = 0; i < 8; i++)
pstate[i] = ByteReverse(pstate[i]);
}
else
{
for (int n = 0; n < nBlocks; n++)
CryptoPP::SHA256::Transform(pstate, pinput + n * 16);
}
}
void BitcoinMiner()
@ -2695,11 +2751,19 @@ void BitcoinMiner()
tmp.block.hashMerkleRoot = pblock->hashMerkleRoot = pblock->BuildMerkleTree();
tmp.block.nTime = pblock->nTime = max((pindexPrev ? pindexPrev->GetMedianTimePast()+1 : 0), GetAdjustedTime());
tmp.block.nBits = pblock->nBits = nBits;
tmp.block.nNonce = pblock->nNonce = 1;
tmp.block.nNonce = pblock->nNonce = 0;
unsigned int nBlocks0 = FormatHashBlocks(&tmp.block, sizeof(tmp.block));
unsigned int nBlocks1 = FormatHashBlocks(&tmp.hash1, sizeof(tmp.hash1));
// Byte swap all the input buffer
for (int i = 0; i < sizeof(tmp)/4; i++)
((unsigned int*)&tmp)[i] = ByteReverse(((unsigned int*)&tmp)[i]);
// Precalc the first half of the first hash, which stays constant
uint256 midstate;
SHA256Transform(&midstate, &tmp.block, pSHA256InitState);
//
// Search
@ -2709,12 +2773,18 @@ void BitcoinMiner()
uint256 hash;
loop
{
BlockSHA256(&tmp.block, nBlocks0, &tmp.hash1);
BlockSHA256(&tmp.hash1, nBlocks1, &hash);
SHA256Transform(&tmp.hash1, (char*)&tmp.block + 64, &midstate);
SHA256Transform(&hash, &tmp.hash1, pSHA256InitState);
if (((unsigned short*)&hash)[14] == 0)
{
// Byte swap the result after preliminary check
for (int i = 0; i < sizeof(hash)/4; i++)
((unsigned int*)&hash)[i] = ByteReverse(((unsigned int*)&hash)[i]);
if (hash <= hashTarget)
{
pblock->nNonce = tmp.block.nNonce;
pblock->nNonce = ByteReverse(tmp.block.nNonce);
assert(hash == pblock->GetHash());
//// debug print
@ -2748,6 +2818,7 @@ void BitcoinMiner()
Sleep(500);
break;
}
}
// Update nTime every few seconds
const unsigned int nMask = 0xffff;
@ -2817,7 +2888,8 @@ void BitcoinMiner()
break;
}
tmp.block.nTime = pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
pblock->nTime = max(pindexPrev->GetMedianTimePast()+1, GetAdjustedTime());
tmp.block.nTime = ByteReverse(pblock->nTime);
}
}
}

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