0x00000100, 0x00000100, 0x00000100, 0x00000100
};
+// Sha256 initial state
+static const uint32_t sha256_initial[8] = { 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 };
+
extern "C" int sha256_use_4way();
extern "C" void sha256_init(uint32_t *state);
extern "C" void sha256_transform(uint32_t *state, const uint32_t *block, int swap);
bnTargetPerCoinDay.SetCompact(nBits);
uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256();
- uint32_t state1[4 * 8] __attribute__((aligned(16)));
- uint32_t state2[4 * 8] __attribute__((aligned(16)));
uint32_t blocks1[4 * 16] __attribute__((aligned(16)));
uint32_t blocks2[4 * 16] __attribute__((aligned(16)));
+ uint32_t candidates[4 * 8] __attribute__((aligned(16)));
vector<uint32_t> vRow = vector<uint32_t>(4);
uint32_t *pnKernel = (uint32_t *) kernel;
// Stopping search in case of shutting down
for (uint32_t nTimeTx=nIntervalBegin, nMaxTarget32 = nMaxTarget.Get32(7); nTimeTx<nIntervalEnd && !fShutdown; nTimeTx +=4)
{
- sha256_init_4way(state1);
- sha256_init_4way(state2);
+ sha256_init_4way(blocks2);
+ sha256_init_4way(candidates);
nTimeStamps[0] = nTimeTx;
nTimeStamps[1] = nTimeTx+1;
nTimeStamps[3] = nTimeTx+3;
copyrow_swap32(&blocks1[24], &nTimeStamps[0]); // Kernel timestamps
- sha256_transform_4way(&state1[0], &blocks1[0], 0); // first hashing
- memcpy(&blocks2[0], &state1[0], 128);
- sha256_transform_4way(&state2[0], &blocks2[0], 0); // second hashing
- copyrow_swap32(&nHashes[0], &state2[28]);
+
+ sha256_transform_4way(&blocks2[0], &blocks1[0], 0); // first hashing
+ sha256_transform_4way(&candidates[0], &blocks2[0], 0); // second hashing
+ copyrow_swap32(&nHashes[0], &candidates[28]);
for(int nResult = 0; nResult < 4; nResult++)
{
uint32_t *pnHashProofOfStake = (uint32_t *) &nHashProofOfStake;
for (int i = 0; i < 7; i++)
- pnHashProofOfStake[i] = __builtin_bswap32(state2[(i*4) + nResult]);
+ pnHashProofOfStake[i] = __builtin_bswap32(candidates[(i*4) + nResult]);
pnHashProofOfStake[7] = nHashes[nResult];
CBigNum bnCoinDayWeight = bnValueIn * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeStamps[nResult]) / COIN / nOneDay;
}
}
- void Do_generic()
+ void Do_oneway()
{
SetThreadPriority(THREAD_PRIORITY_LOWEST);
- // Init new sha256 context and update it
- // with first 24 bytes of kernel
- SHA256_CTX workerCtx;
- SHA256_Init(&workerCtx);
- SHA256_Update(&workerCtx, kernel, 8 + 16);
- SHA256_CTX ctx = workerCtx;
-
- // Sha256 result buffer
- uint32_t hashProofOfStake[8];
-
// Compute maximum possible target to filter out majority of obviously insufficient hashes
CBigNum bnTargetPerCoinDay;
bnTargetPerCoinDay.SetCompact(nBits);
+ uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256();
- uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256(),
- *pnHashProofOfStake = (uint256 *)&hashProofOfStake;
+ uint32_t block1[16] __attribute__((aligned(16)));
+ uint32_t block2[16] __attribute__((aligned(16)));
+ uint32_t candidate[8] __attribute__((aligned(16)));
+
+ memcpy(&block1[7], &block1_suffix[0], 36); // sha256 padding
+ memcpy(&block2[8], &block2_suffix[0], 32);
+
+ uint32_t *pnKernel = (uint32_t *) kernel;
+ copyrow_swap32(&block1[0], pnKernel);
+ block1[4] = __builtin_bswap32(pnKernel[4]);
+ block1[5] = __builtin_bswap32(pnKernel[5]);
// Search forward in time from the given timestamp
// Stopping search in case of shutting down
for (uint32_t nTimeTx=nIntervalBegin, nMaxTarget32 = nMaxTarget.Get32(7); nTimeTx<nIntervalEnd && !fShutdown; nTimeTx++)
{
- // Complete first hashing iteration
- uint256 hash1;
- SHA256_Update(&ctx, (unsigned char*)&nTimeTx, 4);
- SHA256_Final((unsigned char*)&hash1, &ctx);
+ memcpy(&block2[0], &sha256_initial[0], 32);
+ memcpy(&candidate[0], &sha256_initial[0], 32);
- // Restore context
- ctx = workerCtx;
+ block1[6] = __builtin_bswap32(nTimeTx);
- // Finally, calculate kernel hash
- SHA256((unsigned char*)&hash1, sizeof(hashProofOfStake), (unsigned char*)&hashProofOfStake);
+ sha256_transform(&block2[0], &block1[0], 0); // first hashing
+ sha256_transform(&candidate[0], &block2[0], 0); // second hashing
+
+ uint32_t nHash7 = __builtin_bswap32(candidate[7]);
// Skip if hash doesn't satisfy the maximum target
- if (hashProofOfStake[7] > nMaxTarget32)
+ if (nHash7 > nMaxTarget32)
continue;
+ uint256 nHashProofOfStake;
+ uint32_t *pnHashProofOfStake = (uint32_t *) &nHashProofOfStake;
+
+ for (int i = 0; i < 7; i++)
+ pnHashProofOfStake[i] = __builtin_bswap32(candidate[i]);
+ pnHashProofOfStake[7] = nHash7;
+
CBigNum bnCoinDayWeight = bnValueIn * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeTx) / COIN / nOneDay;
CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay;
- if (bnTargetProofOfStake >= CBigNum(*pnHashProofOfStake))
- solutions.push_back(std::pair<uint256,uint32_t>(*pnHashProofOfStake, nTimeTx));
+ if (bnTargetProofOfStake >= CBigNum(nHashProofOfStake))
+ solutions.push_back(std::pair<uint256,uint32_t>(nHashProofOfStake, nTimeTx));
}
}
if (fUse4Way)
Do_4way();
else
- Do_generic();
+ Do_oneway();
}
vector<std::pair<uint256,uint32_t> >& GetSolutions()