using namespace std;
-#ifdef USE_ASM
-
-#if defined(__i386__) || defined(__x86_64__)
-#include <immintrin.h>
-#endif
-
-#ifndef __i386__
-// kernel padding
-static const uint32_t block1_suffix[9] = { 0x80000000, 0, 0, 0, 0, 0, 0, 0, 0x000000e0 };
-// hash padding
-static const uint32_t block2_suffix[8] = { 0x80000000, 0, 0, 0, 0, 0, 0, 0x00000100 };
-
-// Sha256 initial state
-static const uint32_t sha256_initial[8] = { 0x6a09e667, 0xbb67ae85, 0x3c6ef372, 0xa54ff53a, 0x510e527f, 0x9b05688c, 0x1f83d9ab, 0x5be0cd19 };
-
-extern "C" void sha256_transform(uint32_t *state, const uint32_t *block, int swap);
-#endif
-
-// 4-way kernel padding
-static const uint32_t block1_suffix_4way[4 * 9] = {
- 0x80000000, 0x80000000, 0x80000000, 0x80000000,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0
-};
-
-// 4-way hash padding
-static const uint32_t block2_suffix_4way[4 * 8] = {
- 0x80000000, 0x80000000, 0x80000000, 0x80000000,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0, 0, 0, 0,
- 0x00000100, 0x00000100, 0x00000100, 0x00000100
-};
-
-extern "C" int sha256_use_4way();
-extern "C" void sha256_init_4way(uint32_t *state);
-extern "C" void sha256_transform_4way(uint32_t *state, const uint32_t *block, int swap);
-bool fUse4Way = sha256_use_4way() != 0;
-
-#ifdef __x86_64__
-// 8-way kernel padding
-static const uint32_t block1_suffix_8way[8 * 9] = {
- 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0
-};
-
-// 8-way hash padding
-static const uint32_t block2_suffix_8way[8 * 8] = {
- 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000, 0x80000000,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0,
- 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0, 0x000000e0
-};
-
-extern "C" int sha256_use_8way();
-extern "C" void sha256_init_8way(uint32_t *state);
-extern "C" void sha256_transform_8way(uint32_t *state, const uint32_t *block, int swap);
-bool fUse8Way = sha256_use_8way() != 0;
-
-inline void copyrow8_swap32(uint32_t *to, uint32_t *from)
-{
- // There are no AVX2 CPUs without SSSE3 support, so we don't need any conditions here.
- __m128i mask = _mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3);
- _mm_storeu_si128((__m128i *)&to[0], _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)&from[0]), mask));
- _mm_storeu_si128((__m128i *)&to[4], _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)&from[4]), mask));
-}
-#endif
-
-#if defined(__i386__) || defined(__x86_64__)
-extern "C" int sha256_use_ssse3();
-bool fUseSSSE3 = sha256_use_ssse3() != 0;
-
-inline void copyrow4_swap32(uint32_t *to, uint32_t *from)
-{
- if (!fUseSSSE3)
- {
- for (int i = 0; i < 4; i++)
- to[i] = __builtin_bswap32(from[i]);
- }
- else
- {
- __m128i mask = _mm_set_epi8(12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3);
- _mm_storeu_si128((__m128i *)&to[0], _mm_shuffle_epi8(_mm_loadu_si128((__m128i *)&from[0]), mask));
- }
-}
-#else
-inline void copyrow4_swap32(uint32_t *to, uint32_t *from)
-{
- for (int i = 0; i < 4; i++)
- to[i] = __builtin_bswap32(from[i]);
-}
-#endif
-#endif
-
KernelWorker::KernelWorker(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, uint32_t nIntervalBegin, uint32_t nIntervalEnd)
: kernel(kernel), nBits(nBits), nInputTxTime(nInputTxTime), bnValueIn(nValueIn), nIntervalBegin(nIntervalBegin), nIntervalEnd(nIntervalEnd)
{
solutions = vector<std::pair<uint256,uint32_t> >();
}
-#ifdef USE_ASM
-#ifdef __x86_64__
-void KernelWorker::Do_8way()
-{
- SetThreadPriority(THREAD_PRIORITY_LOWEST);
-
- // 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();
-
- uint32_t blocks1[8 * 16] __attribute__((aligned(16)));
- uint32_t blocks2[8 * 16] __attribute__((aligned(16)));
- uint32_t candidates[8 * 8] __attribute__((aligned(16)));
-
- vector<uint32_t> vRow = vector<uint32_t>(8);
- uint32_t *pnKernel = (uint32_t *) kernel;
-
- for(int i = 0; i < 7; i++)
- {
- fill(vRow.begin(), vRow.end(), pnKernel[i]);
- copyrow8_swap32(&blocks1[i*8], &vRow[0]);
- }
-
- memcpy(&blocks1[56], &block1_suffix_8way[0], 36*8); // sha256 padding
- memcpy(&blocks2[64], &block2_suffix_8way[0], 32*8);
-
- uint32_t nHashes[8];
- uint32_t nTimeStamps[8];
-
- // 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 +=8)
- {
- sha256_init_8way(blocks2);
- sha256_init_8way(candidates);
-
- nTimeStamps[0] = nTimeTx;
- nTimeStamps[1] = nTimeTx+1;
- nTimeStamps[2] = nTimeTx+2;
- nTimeStamps[3] = nTimeTx+3;
- nTimeStamps[4] = nTimeTx+4;
- nTimeStamps[5] = nTimeTx+5;
- nTimeStamps[6] = nTimeTx+6;
- nTimeStamps[7] = nTimeTx+7;
-
- copyrow8_swap32(&blocks1[24], &nTimeStamps[0]); // Kernel timestamps
- sha256_transform_8way(&blocks2[0], &blocks1[0], 0); // first hashing
- sha256_transform_8way(&candidates[0], &blocks2[0], 0); // second hashing
- copyrow8_swap32(&nHashes[0], &candidates[56]);
-
- for(int nResult = 0; nResult < 8; nResult++)
- {
- if (nHashes[nResult] <= nMaxTarget32) // Possible hit
- {
- uint256 nHashProofOfStake = 0;
- uint32_t *pnHashProofOfStake = (uint32_t *) &nHashProofOfStake;
-
- for (int i = 0; i < 7; i++)
- pnHashProofOfStake[i] = __builtin_bswap32(candidates[(i*8) + nResult]);
- pnHashProofOfStake[7] = nHashes[nResult];
-
- CBigNum bnCoinDayWeight = bnValueIn * GetWeight((int64_t)nInputTxTime, (int64_t)nTimeStamps[nResult]) / COIN / nOneDay;
- CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay;
-
- if (bnTargetProofOfStake >= CBigNum(nHashProofOfStake))
- solutions.push_back(std::pair<uint256,uint32_t>(nHashProofOfStake, nTimeStamps[nResult]));
- }
- }
- }
-}
-#endif
-
-void KernelWorker::Do_4way()
-{
- SetThreadPriority(THREAD_PRIORITY_LOWEST);
-
- // 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();
-
- 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;
-
- for(int i = 0; i < 7; i++)
- {
- fill(vRow.begin(), vRow.end(), pnKernel[i]);
- copyrow4_swap32(&blocks1[i*4], &vRow[0]);
- }
-
- memcpy(&blocks1[28], &block1_suffix_4way[0], 36*4); // sha256 padding
- memcpy(&blocks2[32], &block2_suffix_4way[0], 32*4);
-
- uint32_t nHashes[4];
- uint32_t nTimeStamps[4];
-
- // 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 +=4)
- {
- sha256_init_4way(blocks2);
- sha256_init_4way(candidates);
-
- nTimeStamps[0] = nTimeTx;
- nTimeStamps[1] = nTimeTx+1;
- nTimeStamps[2] = nTimeTx+2;
- nTimeStamps[3] = nTimeTx+3;
-
- copyrow4_swap32(&blocks1[24], &nTimeStamps[0]); // Kernel timestamps
- sha256_transform_4way(&blocks2[0], &blocks1[0], 0); // first hashing
- sha256_transform_4way(&candidates[0], &blocks2[0], 0); // second hashing
- copyrow4_swap32(&nHashes[0], &candidates[28]);
-
- for(int nResult = 0; nResult < 4; nResult++)
- {
- if (nHashes[nResult] <= nMaxTarget32) // Possible hit
- {
- uint256 nHashProofOfStake = 0;
- uint32_t *pnHashProofOfStake = (uint32_t *) &nHashProofOfStake;
-
- for (int i = 0; i < 7; i++)
- 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;
- CBigNum bnTargetProofOfStake = bnCoinDayWeight * bnTargetPerCoinDay;
-
- if (bnTargetProofOfStake >= CBigNum(nHashProofOfStake))
- solutions.push_back(std::pair<uint256,uint32_t>(nHashProofOfStake, nTimeStamps[nResult]));
- }
- }
- }
-}
-#endif
-
void KernelWorker::Do_generic()
{
SetThreadPriority(THREAD_PRIORITY_LOWEST);
bnTargetPerCoinDay.SetCompact(nBits);
uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256();
-#if !defined(USE_ASM) || defined(__i386__)
SHA256_CTX ctx, workerCtx;
// Init new sha256 context and update it
// with first 24 bytes of kernel
if (bnTargetProofOfStake >= CBigNum(*pnHashProofOfStake))
solutions.push_back(std::pair<uint256,uint32_t>(*pnHashProofOfStake, nTimeTx));
}
-#else
- uint32_t block1[16] __attribute__((aligned(16)));
- uint32_t block2[16] __attribute__((aligned(16)));
- uint32_t candidate[8] __attribute__((aligned(16)));
+}
+
+void KernelWorker::Do()
+{
+ Do_generic();
+}
- memcpy(&block1[7], &block1_suffix[0], 36); // sha256 padding
- memcpy(&block2[8], &block2_suffix[0], 32);
+vector<pair<uint256,uint32_t> >& KernelWorker::GetSolutions()
+{
+ return solutions;
+}
- uint32_t *pnKernel = (uint32_t *) kernel;
+// Scan given kernel for solutions
- for (int i = 0; i < 6; i++)
- block1[i] = __builtin_bswap32(pnKernel[i]);
+bool ScanKernelBackward(unsigned char *kernel, uint32_t nBits, uint32_t nInputTxTime, int64_t nValueIn, std::pair<uint32_t, uint32_t> &SearchInterval, std::pair<uint256, uint32_t> &solution)
+{
+ CBigNum bnTargetPerCoinDay;
+ bnTargetPerCoinDay.SetCompact(nBits);
- // Search forward in time from the given timestamp
+ CBigNum bnValueIn(nValueIn);
+
+ // Get maximum possible target to filter out the majority of obviously insufficient hashes
+ uint256 nMaxTarget = (bnTargetPerCoinDay * bnValueIn * nStakeMaxAge / COIN / nOneDay).getuint256();
+
+ SHA256_CTX ctx, workerCtx;
+ // Init new sha256 context and update it
+ // with first 24 bytes of kernel
+ SHA256_Init(&ctx);
+ SHA256_Update(&ctx, kernel, 8 + 16);
+ workerCtx = ctx; // save context
+
+ // Search backward 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++)
+ for (uint32_t nTimeTx=SearchInterval.first; nTimeTx>SearchInterval.second && !fShutdown; nTimeTx--)
{
- memcpy(&block2[0], &sha256_initial[0], 32);
- memcpy(&candidate[0], &sha256_initial[0], 32);
-
- block1[6] = __builtin_bswap32(nTimeTx);
+ // Complete first hashing iteration
+ uint256 hash1;
+ SHA256_Update(&ctx, (unsigned char*)&nTimeTx, 4);
+ SHA256_Final((unsigned char*)&hash1, &ctx);
- sha256_transform(&block2[0], &block1[0], 0); // first hashing
- sha256_transform(&candidate[0], &block2[0], 0); // second hashing
+ // Restore context
+ ctx = workerCtx;
- uint32_t nHash7 = __builtin_bswap32(candidate[7]);
+ // Finally, calculate kernel hash
+ uint256 hashProofOfStake;
+ SHA256((unsigned char*)&hash1, sizeof(hashProofOfStake), (unsigned char*)&hashProofOfStake);
// Skip if hash doesn't satisfy the maximum target
- if (nHash7 > nMaxTarget32)
+ if (hashProofOfStake > nMaxTarget)
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(nHashProofOfStake))
- solutions.push_back(std::pair<uint256,uint32_t>(nHashProofOfStake, nTimeTx));
- }
-#endif
-}
+ if (bnTargetProofOfStake >= CBigNum(hashProofOfStake))
+ {
+ solution.first = hashProofOfStake;
+ solution.second = nTimeTx;
-void KernelWorker::Do()
-{
-#ifdef USE_ASM
-#ifdef __x86_64__
- if (false && fUse8Way) // disable for now
- {
- Do_8way();
- return;
- }
-#endif
- if (fUse4Way)
- {
- Do_4way();
- return;
+ return true;
+ }
}
-#endif
-
- Do_generic();
-}
-vector<pair<uint256,uint32_t> >& KernelWorker::GetSolutions()
-{
- return solutions;
+ return false;
}
-
git://git.novaco.in / novacoin.git / blobdiff