GOSTCoin CUDA miner project, compatible with most nvidia cards, containing only gostd algo
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/**
* bmw-256 MDT
* tpruvot - 2015
*/
extern "C" {
#include "sph/sph_bmw.h"
}
#include "miner.h"
#include "cuda_helper.h"
static uint32_t *d_hash[MAX_GPUS];
extern void bmw256_midstate_init(int thr_id, uint32_t threads);
extern void bmw256_midstate_free(int thr_id);
extern void bmw256_setBlock_80(int thr_id, void *pdata);
extern void bmw256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_outputHash, int swap);
extern uint32_t cuda_check_hash_32(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_inputHash);
// CPU Hash
extern "C" void bmw_hash(void *state, const void *input)
{
uint32_t _ALIGN(64) hash[16];
sph_bmw256_context ctx;
sph_bmw256_init(&ctx);
sph_bmw256(&ctx, input, 80);
sph_bmw256_close(&ctx, (void*) hash);
memcpy(state, hash, 32);
}
static bool init[MAX_GPUS] = { 0 };
static __inline uint32_t swab32_if(uint32_t val, bool iftrue) {
return iftrue ? swab32(val) : val;
}
extern "C" int scanhash_bmw(int thr_id, struct work* work, uint32_t max_nonce, unsigned long *hashes_done)
{
uint32_t _ALIGN(64) endiandata[20];
uint32_t *pdata = work->data;
uint32_t *ptarget = work->target;
const uint32_t first_nonce = pdata[19];
bool swapnonce = true;
uint32_t throughput = cuda_default_throughput(thr_id, 1U << 21);
if (init[thr_id]) throughput = min(throughput, max_nonce - first_nonce);
if (opt_benchmark)
ptarget[7] = 0x0005;
if (!init[thr_id]) {
cudaSetDevice(device_map[thr_id]);
cuda_check_cpu_init(thr_id, throughput);
bmw256_midstate_init(thr_id, throughput);
CUDA_SAFE_CALL(cudaMalloc(&d_hash[thr_id], (size_t)32 * throughput));
init[thr_id] = true;
}
for (int k=0; k < 20; k++) {
be32enc(&endiandata[k], ((uint32_t*)pdata)[k]);
}
cudaGetLastError();
bmw256_setBlock_80(thr_id, (void*)endiandata);
cuda_check_cpu_setTarget(ptarget);
do {
bmw256_cpu_hash_80(thr_id, (int) throughput, pdata[19], d_hash[thr_id], (int) swapnonce);
uint32_t foundNonce = cuda_check_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id]);
if (foundNonce != UINT32_MAX)
{
uint32_t _ALIGN(64) vhash64[8];
endiandata[19] = swab32_if(foundNonce, swapnonce);
bmw_hash(vhash64, endiandata);
if (vhash64[7] <= ptarget[7] && fulltest(vhash64, ptarget)) {
*hashes_done = foundNonce - first_nonce + 1;
pdata[19] = swab32_if(foundNonce,!swapnonce);
work_set_target_ratio(work, vhash64);
return 1;
}
else {
applog(LOG_DEBUG, "GPU #%d: result for nounce %08x does not validate on CPU!", thr_id, foundNonce);
}
}
if ((uint64_t) throughput + pdata[19] > max_nonce) {
pdata[19] = max_nonce;
break;
}
pdata[19] += throughput;
} while (!work_restart[thr_id].restart);
*hashes_done = pdata[19] - first_nonce;
return 0;
}
// cleanup
extern "C" void free_bmw(int thr_id)
{
if (!init[thr_id])
return;
cudaSetDevice(device_map[thr_id]);
cudaFree(d_hash[thr_id]);
bmw256_midstate_free(thr_id);
cuda_check_cpu_free(thr_id);
init[thr_id] = false;
cudaDeviceSynchronize();
}