C++ (Cpp) scanhash_sha256d_4way Examples

Example #1

File: sha2.c Project: kiyominer/cpuminer

int scanhash_sha256d(int thr_id, uint32_t *pdata, const uint32_t *ptarget,
	uint32_t max_nonce, unsigned long *hashes_done)
{
	uint32_t data[64] __attribute__((aligned(128)));
	uint32_t hash[8] __attribute__((aligned(32)));
	uint32_t midstate[8] __attribute__((aligned(32)));
	uint32_t prehash[8] __attribute__((aligned(32)));
	uint32_t n = pdata[19] - 1;
	const uint32_t first_nonce = pdata[19];
	const uint32_t Htarg = ptarget[7];
	
#ifdef HAVE_SHA256_16WAY
	if (sha256_use_16way())
		return scanhash_sha256d_16way(thr_id, pdata, ptarget,
			max_nonce, hashes_done);
#endif
#ifdef HAVE_SHA256_8WAY
	if (sha256_use_8way())
		return scanhash_sha256d_8way(thr_id, pdata, ptarget,
			max_nonce, hashes_done);
#endif
#ifdef HAVE_SHA256_4WAY
	if (sha256_use_4way())
		return scanhash_sha256d_4way(thr_id, pdata, ptarget,
			max_nonce, hashes_done);
#endif
	
	memcpy(data, pdata + 16, 64);
	sha256d_preextend(data);
	
	sha256_init(midstate);
	sha256_transform(midstate, pdata, 0);
	memcpy(prehash, midstate, 32);
	sha256d_prehash(prehash, pdata + 16);
	
	do {
		data[3] = ++n;
		sha256d_ms(hash, data, midstate, prehash);
		if (swab32(hash[7]) <= Htarg) {
			pdata[19] = data[3];
			sha256d_80_swap(hash, pdata);
			if (fulltest(hash, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return 1;
			}
		}
	} while (n < max_nonce && !work_restart[thr_id].restart);
	
	*hashes_done = n - first_nonce + 1;
	pdata[19] = n;
	return 0;
}

Example #2

int scanhash_sha256d(int thr_id, struct work *work,
	uint32_t max_nonce, uint64_t *hashes_done)
{
        uint32_t *pdata = work->data;
        uint32_t *ptarget = work->target;
	uint32_t _ALIGN(128) data[64];
	uint32_t _ALIGN(32) hash[8];
	uint32_t _ALIGN(32) midstate[8];
	uint32_t _ALIGN(32) prehash[8];
	uint32_t n = pdata[19] - 1;
	const uint32_t first_nonce = pdata[19];
	const uint32_t Htarg = ptarget[7];
	
#ifdef HAVE_SHA256_8WAY
	if (sha256_use_8way())
		return scanhash_sha256d_8way(thr_id, work,
			max_nonce, hashes_done);
#endif
#ifdef HAVE_SHA256_4WAY
	if (sha256_use_4way())
		return scanhash_sha256d_4way(thr_id, work,
			max_nonce, hashes_done);
#endif
	
	memcpy(data, pdata + 16, 64);
	sha256d_preextend(data);
	
	sha256_init(midstate);
	sha256_transform(midstate, pdata, 0);
	memcpy(prehash, midstate, 32);
	sha256d_prehash(prehash, pdata + 16);
	
	do {
		data[3] = ++n;
		sha256d_ms(hash, data, midstate, prehash);
		if (unlikely(swab32(hash[7]) <= Htarg)) {
			pdata[19] = data[3];
			sha256d_80_swap(hash, pdata);
			if (fulltest(hash, ptarget)) {
				*hashes_done = n - first_nonce + 1;
				return 1;
			}
		}
	} while (likely(n < max_nonce && !work_restart[thr_id].restart));
	
	*hashes_done = n - first_nonce + 1;
	pdata[19] = n;
	return 0;
}