GOSTcoin support for ccminer CUDA miner project, compatible with most nvidia cards
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#include <cuda_runtime.h>
#include <string.h>
#include <miner.h>
#include "neoscrypt.h"
extern void neoscrypt_setBlockTarget(uint32_t* const data, uint32_t* const ptarget);
extern void neoscrypt_init(int thr_id, uint32_t threads);
extern void neoscrypt_free(int thr_id);
extern void neoscrypt_hash_k4(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *resNonces, bool stratum);
static bool init[MAX_GPUS] = { 0 };
int scanhash_neoscrypt(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];
int dev_id = device_map[thr_id];
int intensity = is_windows() ? 18 : 19;
if (strstr(device_name[dev_id], "GTX 10")) intensity = 21; // >= 20 need more than 2GB
uint32_t throughput = cuda_default_throughput(thr_id, 1U << intensity);
throughput = throughput / 32; /* set for max intensity ~= 20 */
api_set_throughput(thr_id, throughput);
if (opt_benchmark)
ptarget[7] = 0x00ff;
if (!init[thr_id])
{
cudaDeviceSynchronize();
cudaSetDevice(dev_id);
if (opt_cudaschedule == -1 && gpu_threads == 1) {
cudaDeviceReset();
// reduce cpu usage
cudaSetDeviceFlags(cudaDeviceScheduleBlockingSync);
cudaGetLastError(); // reset errors if device is not "reset"
}
if (device_sm[dev_id] <= 300) {
gpulog(LOG_ERR, thr_id, "Sorry neoscrypt is not supported on SM 3.0 devices");
proper_exit(EXIT_CODE_CUDA_ERROR);
}
gpulog(LOG_INFO, thr_id, "Using %d cuda threads", throughput);
neoscrypt_init(thr_id, throughput);
init[thr_id] = true;
}
if (have_stratum) {
for (int k = 0; k < 20; k++)
be32enc(&endiandata[k], pdata[k]);
} else {
for (int k = 0; k < 20; k++)
endiandata[k] = pdata[k];
}
neoscrypt_setBlockTarget(endiandata,ptarget);
do {
uint32_t foundNonces[2] = { UINT32_MAX, UINT32_MAX };
neoscrypt_hash_k4(thr_id, throughput, pdata[19], foundNonces, have_stratum);
*hashes_done = pdata[19] - first_nonce + throughput;
if (foundNonces[0] != UINT32_MAX)
{
uint32_t _ALIGN(64) vhash[8];
if (have_stratum) {
be32enc(&endiandata[19], foundNonces[0]);
} else {
endiandata[19] = foundNonces[0];
}
neoscrypt((uchar*)vhash, (uchar*) endiandata, 0x80000620U);
if (vhash[7] <= ptarget[7] && fulltest(vhash, ptarget)) {
work_set_target_ratio(work, vhash);
pdata[19] = foundNonces[0];
return 1;
} else {
gpulog(LOG_WARNING, thr_id, "nonce %08x does not validate on CPU!", foundNonces[0]);
}
}
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
void free_neoscrypt(int thr_id)
{
if (!init[thr_id])
return;
cudaThreadSynchronize();
neoscrypt_free(thr_id);
init[thr_id] = false;
cudaDeviceSynchronize();
}