OpenCL GPU miner
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/*
* BLAKE implementation.
*
* ==========================(LICENSE BEGIN)============================
*
* Copyright (c) 2007-2010 Projet RNRT SAPHIR
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* ===========================(LICENSE END)=============================
*
* @author Thomas Pornin <thomas.pornin@cryptolog.com>
*
* Modified for more speed by BlueDragon747 for the Blakecoin project
*/
#include <stddef.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
#include "sph/sph_blake.h"
#include "algorithm/blake256.h"
static const uint32_t diff1targ_blake256 = 0x000000ff;
void blake256hash(void *state, const void *input)
{
sph_blake256_context ctx_blake;
sph_blake256_init(&ctx_blake);
sph_blake256(&ctx_blake, input, 80);
sph_blake256_close(&ctx_blake, state);
}
void blake256_midstate(struct work *work)
{
sph_blake256_context ctx_blake;
uint32_t data[16];
be32enc_vect(data, (const uint32_t *)work->data, 19);
sph_blake256_init(&ctx_blake);
sph_blake256 (&ctx_blake, (unsigned char *)data, 64);
memcpy(work->midstate, ctx_blake.H, 32);
endian_flip32(work->midstate, work->midstate);
char *strdata, *strmidstate;
strdata = bin2hex(work->data, 80);
strmidstate = bin2hex(work->midstate, 32);
applog(LOG_DEBUG, "data %s midstate %s", strdata, strmidstate);
}
void blake256_prepare_work(dev_blk_ctx *blk, uint32_t *state, uint32_t *pdata)
{
blk->ctx_a = state[0];
blk->ctx_b = state[1];
blk->ctx_c = state[2];
blk->ctx_d = state[3];
blk->ctx_e = state[4];
blk->ctx_f = state[5];
blk->ctx_g = state[6];
blk->ctx_h = state[7];
blk->cty_a = pdata[16];
blk->cty_b = pdata[17];
blk->cty_c = pdata[18];
}
static const uint32_t diff1targ = 0x0000ffff;
/* Used externally as confirmation of correct OCL code */
int blake256_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];
be32enc_vect(data, (const uint32_t *)pdata, 19);
data[19] = htobe32(nonce);
blake256hash(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 blake256_regenhash(struct work *work)
{
uint32_t data[20];
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);
blake256hash(ohash, data);
}
bool scanhash_blake256(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);
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);
blake256hash(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;
}