OpenCL GPU miner
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/*-
* Copyright 2015 djm34
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "config.h"
#include "miner.h"
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "sph/sph_sha2.h"
static const uint32_t diff1targ = 0x0000ffff;
void credits_hash(void *state, const void *input)
{
sph_sha256_context sha1, sha2;
uint32_t hash[8], hash2[8];
sph_sha256_init(&sha1);
sph_sha256(&sha1, input, 168);
sph_sha256_close(&sha1, hash);
sph_sha256_init(&sha2);
sph_sha256(&sha2, hash, 32);
sph_sha256_close(&sha2, hash2);
memcpy(state, hash2, 32);
}
/* Used externally as confirmation of correct OCL code */
int credits_test(unsigned char *pdata, const unsigned char *ptarget, uint32_t nonce)
{
uint32_t tmp_hash7, Htarg = le32toh(((const uint32_t *)ptarget)[7]);
uint32_t data[42], ohash[8];
printf("coming here credits test\n");
be32enc_vect(data, (const uint32_t *)pdata, 42);
data[35] = htobe32(nonce);
credits_hash((unsigned char*)data,(unsigned char*)ohash);
tmp_hash7 = be32toh(ohash[7]);
applog(LOG_DEBUG, "htarget %08lx diff1 %08lx hash %08lx",
(long unsigned int)Htarg,
(long unsigned int)diff1targ,
(long unsigned int)tmp_hash7);
if (tmp_hash7 > diff1targ)
return -1;
if (tmp_hash7 > Htarg)
return 0;
return 1;
}
void credits_regenhash(struct work *work)
{
uint32_t data[42];
uint32_t *nonce = (uint32_t *)(work->data + 140);
uint32_t *ohash = (uint32_t *)(work->hash);
be32enc_vect(data, (const uint32_t *)work->data, 42);
data[35] = htobe32(*nonce);
credits_hash((unsigned char*)ohash, (unsigned char*)data);
}
bool scanhash_credits(struct thr_info *thr, const unsigned char __maybe_unused *pmidstate,
unsigned char *pdata, unsigned char __maybe_unused *phash1,
unsigned char __maybe_unused *phash, const unsigned char *ptarget,
uint32_t max_nonce, uint32_t *last_nonce, uint32_t n)
{
uint32_t *nonce = (uint32_t *)(pdata + 140);
uint32_t data[42];
uint32_t tmp_hash7;
uint32_t Htarg = le32toh(((const uint32_t *)ptarget)[7]);
bool ret = false;
be32enc_vect(data, (const uint32_t *)pdata, 35);
while (1)
{
uint32_t ostate[8];
*nonce = ++n;
data[35] = (n);
credits_hash(ostate, data);
tmp_hash7 = (ostate[7]);
applog(LOG_INFO, "data7 %08lx", (long unsigned int)ostate[7]);
if (unlikely(tmp_hash7 <= Htarg))
{
((uint32_t *)pdata)[35] = htobe32(n);
*last_nonce = n;
ret = true;
break;
}
if (unlikely((n >= max_nonce) || thr->work_restart))
{
*last_nonce = n;
break;
}
}
return ret;
}