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102 lines
2.5 KiB
102 lines
2.5 KiB
9 years ago
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/**
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* bmw-256 MDT
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* tpruvot - 2015
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*/
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extern "C" {
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#include "sph/sph_bmw.h"
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}
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#include "miner.h"
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#include "cuda_helper.h"
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static uint32_t *d_hash[MAX_GPUS];
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extern void bmw256_midstate_init(int thr_id, uint32_t threads);
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extern void bmw256_setBlock_80(int thr_id, void *pdata);
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extern void bmw256_cpu_hash_80(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_outputHash, int swap);
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extern uint32_t cuda_check_hash_32(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_inputHash);
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// CPU Hash
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extern "C" void bmw_hash(void *state, const void *input)
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{
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uint32_t _ALIGN(64) hash[16];
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sph_bmw256_context ctx;
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sph_bmw256_init(&ctx);
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sph_bmw256(&ctx, input, 80);
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sph_bmw256_close(&ctx, (void*) hash);
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memcpy(state, hash, 32);
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}
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static bool init[MAX_GPUS] = { 0 };
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static __inline uint32_t swab32_if(uint32_t val, bool iftrue) {
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return iftrue ? swab32(val) : val;
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}
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extern "C" int scanhash_bmw(int thr_id, uint32_t *pdata, const uint32_t *ptarget,
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uint32_t max_nonce, unsigned long *hashes_done)
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{
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const uint32_t first_nonce = pdata[19];
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bool swapnonce = true;
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uint32_t throughput = device_intensity(thr_id, __func__, 1U << 21);
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throughput = min(throughput, max_nonce - first_nonce);
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if (opt_benchmark)
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((uint32_t*)ptarget)[7] = 0x0005;
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if (!init[thr_id]) {
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cudaSetDevice(device_map[thr_id]);
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cuda_check_cpu_init(thr_id, throughput);
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bmw256_midstate_init(thr_id, throughput);
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CUDA_SAFE_CALL(cudaMalloc(&d_hash[thr_id], (size_t)32 * throughput));
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init[thr_id] = true;
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}
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uint32_t endiandata[20];
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for (int k=0; k < 20; k++) {
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be32enc(&endiandata[k], ((uint32_t*)pdata)[k]);
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}
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bmw256_setBlock_80(thr_id, (void*)endiandata);
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cuda_check_cpu_setTarget(ptarget);
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do {
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bmw256_cpu_hash_80(thr_id, (int) throughput, pdata[19], d_hash[thr_id], (int) swapnonce);
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uint32_t foundNonce = cuda_check_hash_32(thr_id, throughput, pdata[19], d_hash[thr_id]);
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if (foundNonce != UINT32_MAX)
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{
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uint32_t _ALIGN(64) vhash64[8];
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endiandata[19] = swab32_if(foundNonce, swapnonce);
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bmw_hash(vhash64, endiandata);
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if (vhash64[7] <= ptarget[7] && fulltest(vhash64, ptarget)) {
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*hashes_done = foundNonce - first_nonce + 1;
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pdata[19] = swab32_if(foundNonce,!swapnonce);
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return 1;
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}
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else {
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applog(LOG_DEBUG, "GPU #%d: result for nounce %08x does not validate on CPU!", thr_id, foundNonce);
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}
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}
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if ((uint64_t) throughput + pdata[19] > max_nonce) {
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pdata[19] = max_nonce;
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break;
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}
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pdata[19] += throughput;
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} while (!work_restart[thr_id].restart);
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*hashes_done = pdata[19] - first_nonce;
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return 0;
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}
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