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skein2.cpp
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skein2.cpp
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/**
* SKEIN512 80 + SKEIN512 64 (Woodcoin)
* by tpruvot@github - 2015
*/
#include <string.h>
#include "sph/sph_skein.h"
#include "miner.h"
#include "cuda_helper.h"
static uint32_t *d_hash[MAX_GPUS];
extern void skein512_cpu_setBlock_80(void *pdata);
extern void skein512_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_hash, int swap);
extern void quark_skein512_cpu_init(int thr_id, uint32_t threads);
extern void quark_skein512_cpu_hash_64(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_hash, int order);
void skein2hash(void *output, const void *input)
{
uint32_t _ALIGN(64) hash[16];
sph_skein512_context ctx_skein;
sph_skein512_init(&ctx_skein);
sph_skein512(&ctx_skein, input, 80);
sph_skein512_close(&ctx_skein, hash);
sph_skein512_init(&ctx_skein);
sph_skein512(&ctx_skein, hash, 64);
sph_skein512_close(&ctx_skein, hash);
memcpy(output, (void*) hash, 32);
}
static bool init[MAX_GPUS] = { 0 };
int scanhash_skein2(int thr_id, struct work* work, uint32_t max_nonce, unsigned long *hashes_done)
{
int dev_id = device_map[thr_id];
uint32_t *pdata = work->data;
uint32_t *ptarget = work->target;
const uint32_t first_nonce = pdata[19];
uint32_t throughput = cuda_default_throughput(thr_id, 1U << 19); // 256*256*8
if (init[thr_id]) throughput = min(throughput, max_nonce - first_nonce);
if (opt_benchmark)
((uint32_t*)ptarget)[7] = 0;
if (!init[thr_id])
{
cudaSetDevice(dev_id);
if (opt_cudaschedule == -1 && gpu_threads == 1) {
cudaDeviceReset();
// reduce cpu usage
cudaSetDeviceFlags(cudaDeviceScheduleBlockingSync);
CUDA_LOG_ERROR();
}
gpulog(LOG_INFO, thr_id, "Intensity set to %g, %u cuda threads", throughput2intensity(throughput), throughput);
cudaMalloc(&d_hash[thr_id], (size_t) 64 * throughput);
quark_skein512_cpu_init(thr_id, throughput);
cuda_check_cpu_init(thr_id, throughput);
CUDA_SAFE_CALL(cudaDeviceSynchronize());
init[thr_id] = true;
}
uint32_t endiandata[20];
for (int k=0; k < 19; k++)
be32enc(&endiandata[k], pdata[k]);
skein512_cpu_setBlock_80((void*)endiandata);
cuda_check_cpu_setTarget(ptarget);
do {
int order = 0;
// Hash with CUDA
skein512_cpu_hash_80(thr_id, throughput, pdata[19], d_hash[thr_id], 1);
quark_skein512_cpu_hash_64(thr_id, throughput, pdata[19], NULL, d_hash[thr_id], order++);
*hashes_done = pdata[19] - first_nonce + throughput;
work->nonces[0] = cuda_check_hash(thr_id, throughput, pdata[19], d_hash[thr_id]);
if (work->nonces[0] != UINT32_MAX)
{
uint32_t _ALIGN(64) vhash[8];
endiandata[19] = swab32(work->nonces[0]);
skein2hash(vhash, endiandata);
if (vhash[7] <= ptarget[7] && fulltest(vhash, ptarget)) {
work->valid_nonces = 1;
work->nonces[1] = cuda_check_hash_suppl(thr_id, throughput, pdata[19], d_hash[thr_id], 1);
work_set_target_ratio(work, vhash);
if (work->nonces[1] != 0) {
endiandata[19] = swab32(work->nonces[1]);
skein2hash(vhash, endiandata);
work->valid_nonces++;
bn_set_target_ratio(work, vhash, 1);
gpulog(LOG_DEBUG, thr_id, "found second nonce %08x!", endiandata[19]);
pdata[19] = max(work->nonces[0], work->nonces[1]) + 1;
} else {
pdata[19] = work->nonces[0] + 1; // cursor for next scan
}
return work->valid_nonces;
}
else if (vhash[7] > ptarget[7]) {
gpu_increment_reject(thr_id);
if (!opt_quiet)
gpulog(LOG_WARNING, thr_id, "result for %08x does not validate on CPU!", work->nonces[0]);
pdata[19] = work->nonces[0] + 1;
continue;
}
}
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_skein2(int thr_id)
{
if (!init[thr_id])
return;
cudaThreadSynchronize();
cudaFree(d_hash[thr_id]);
cuda_check_cpu_free(thr_id);
init[thr_id] = false;
cudaDeviceSynchronize();
}