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keccak256.cu
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keccak256.cu
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/*
* Keccak 256
*
*/
extern "C"
{
#include "sph/sph_shavite.h"
#include "sph/sph_simd.h"
#include "sph/sph_keccak.h"
#include "miner.h"
}
#include "cuda_helper.h"
static uint32_t *d_hash[8];
extern void keccak256_cpu_init(int thr_id, int threads);
extern void keccak256_setBlock_80(void *pdata,const void *ptarget);
extern uint32_t keccak256_cpu_hash_80(int thr_id, int threads, uint32_t startNounce, uint32_t *d_hash, int order);
// CPU Hash
extern "C" void keccak256_hash(void *state, const void *input)
{
sph_keccak_context ctx_keccak;
uint32_t hash[16];
sph_keccak256_init(&ctx_keccak);
sph_keccak256 (&ctx_keccak, input, 80);
sph_keccak256_close(&ctx_keccak, (void*) hash);
memcpy(state, hash, 32);
}
extern "C" int scanhash_keccak256(int thr_id, uint32_t *pdata,
const uint32_t *ptarget, uint32_t max_nonce,
unsigned long *hashes_done)
{
const uint32_t first_nonce = pdata[19];
if (opt_benchmark)
((uint32_t*)ptarget)[7] = 0x0005;
uint32_t throughput = opt_work_size ? opt_work_size : (1 << 21); // 256*256*8*4
throughput = min(throughput, (int)(max_nonce - first_nonce));
static bool init[8] = {0,0,0,0,0,0,0,0};
if (!init[thr_id]) {
cudaSetDevice(device_map[thr_id]);
CUDA_SAFE_CALL(cudaMalloc(&d_hash[thr_id], 16 * sizeof(uint32_t) * throughput));
keccak256_cpu_init(thr_id, throughput);
init[thr_id] = true;
}
uint32_t endiandata[20];
for (int k=0; k < 20; k++) {
be32enc(&endiandata[k], ((uint32_t*)pdata)[k]);
}
keccak256_setBlock_80((void*)endiandata, ptarget);
do {
int order = 0;
uint32_t foundNonce = keccak256_cpu_hash_80(thr_id, throughput, pdata[19], d_hash[thr_id], order++);
if (foundNonce != 0xffffffff)
{
uint32_t vhash64[8];
uint32_t Htarg = ptarget[7];
be32enc(&endiandata[19], foundNonce);
keccak256_hash(vhash64, endiandata);
if (vhash64[7] <= Htarg && fulltest(vhash64, ptarget)) {
*hashes_done = pdata[19] + throughput - first_nonce;
pdata[19] = foundNonce;
return 1;
} else {
applog(LOG_DEBUG, "GPU #%d: result for nounce %08x does not validate on CPU!", thr_id, foundNonce);
}
}
if ((uint64_t) pdata[19] + throughput > (uint64_t) max_nonce) {
pdata[19] = max_nonce;
break;
}
pdata[19] += throughput;
} while (!work_restart[thr_id].restart);
*hashes_done = pdata[19] - first_nonce + 1;
return 0;
}