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fuguecoin.c
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fuguecoin.c
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/*-
* Copyright 2014 phm
* 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_fugue.h"
/*
* Encode a length len/4 vector of (uint32_t) into a length len vector of
* (unsigned char) in big-endian form. Assumes len is a multiple of 4.
*/
static inline void
be32enc_vect(uint32_t *dst, const uint32_t *src, uint32_t len)
{
uint32_t i;
for (i = 0; i < len; i++)
dst[i] = htobe32(src[i]);
}
inline void fuguehash(void *state, const void *input)
{
sph_fugue256_context ctx_fugue;
sph_fugue256_init(&ctx_fugue);
sph_fugue256 (&ctx_fugue, input, 80);
sph_fugue256_close(&ctx_fugue, state);
}
static const uint32_t diff1targ = 0x0000ffff;
/* Used externally as confirmation of correct OCL code */
int fuguecoin_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[20], ohash[8];
//char *scratchbuf;
be32enc_vect(data, (const uint32_t *)pdata, 19);
data[19] = htobe32(nonce);
//scratchbuf = alloca(SCRATCHBUF_SIZE);
fuguehash(ohash, data);
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 fuguecoin_regenhash(struct work *work)
{
uint32_t data[20];
char *scratchbuf;
uint32_t *nonce = (uint32_t *)(work->data + 76);
uint32_t *ohash = (uint32_t *)(work->hash);
be32enc_vect(data, (const uint32_t *)work->data, 19);
data[19] = htobe32(*nonce);
fuguehash(ohash, data);
}
bool scanhash_fuguecoin(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 + 76);
char *scratchbuf;
uint32_t data[20];
uint32_t tmp_hash7;
uint32_t Htarg = le32toh(((const uint32_t *)ptarget)[7]);
bool ret = false;
be32enc_vect(data, (const uint32_t *)pdata, 19);
while(1) {
uint32_t ostate[8];
*nonce = ++n;
data[19] = (n);
fuguehash(ostate, data);
tmp_hash7 = (ostate[7]);
applog(LOG_INFO, "data7 %08lx",
(long unsigned int)data[7]);
if (unlikely(tmp_hash7 <= Htarg)) {
((uint32_t *)pdata)[19] = htobe32(n);
*last_nonce = n;
ret = true;
break;
}
if (unlikely((n >= max_nonce) || thr->work_restart)) {
*last_nonce = n;
break;
}
}
return ret;
}