algorithm.c

/*
 * Copyright 2014 sgminer developers
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or (at
 * your option) any later version.  See COPYING for more details.
 */

#include "algorithm.h"
#include "sph/sph_sha2.h"
#include "ocl.h"
#include "ocl/build_kernel.h"

#include "algorithm/scrypt.h"
#include "algorithm/animecoin.h"
#include "algorithm/inkcoin.h"
#include "algorithm/quarkcoin.h"
#include "algorithm/qubitcoin.h"
#include "algorithm/sifcoin.h"
#include "algorithm/darkcoin.h"
#include "algorithm/myriadcoin-groestl.h"
#include "algorithm/fuguecoin.h"
#include "algorithm/groestlcoin.h"
#include "algorithm/twecoin.h"
#include "algorithm/marucoin.h"
#include "algorithm/maxcoin.h"
#include "algorithm/talkcoin.h"
#include "algorithm/bitblock.h"

#include "compat.h"

#include <inttypes.h>
#include <string.h>
void sha256(const unsigned char *message, unsigned int len, unsigned char *digest)
{
  sph_sha256_context ctx_sha2;

  sph_sha256_init(&ctx_sha2);
  sph_sha256(&ctx_sha2, message, len);
  sph_sha256_close(&ctx_sha2, (void*)digest);
}

void gen_hash(const unsigned char *data, unsigned int len, unsigned char *hash)
{
  unsigned char hash1[32];
  sph_sha256_context ctx_sha2;

  sph_sha256_init(&ctx_sha2);
  sph_sha256(&ctx_sha2, data, len);
  sph_sha256_close(&ctx_sha2, hash1);
  sph_sha256(&ctx_sha2, hash1, 32);
  sph_sha256_close(&ctx_sha2, hash);
}

#define CL_SET_BLKARG(blkvar) status |= clSetKernelArg(*kernel, num++, sizeof(uint), (void *)&blk->blkvar)
#define CL_SET_VARG(args, var) status |= clSetKernelArg(*kernel, num++, args * sizeof(uint), (void *)var)
#define CL_SET_ARG_N(n, var) do { status |= clSetKernelArg(*kernel, n, sizeof(var), (void *)&var); } while (0)
#define CL_SET_ARG_0(var) CL_SET_ARG_N(0, var)
#define CL_SET_ARG(var) CL_SET_ARG_N(num++, var)
#define CL_NEXTKERNEL_SET_ARG_N(n, var) do { kernel++; CL_SET_ARG_N(n, var); } while (0)
#define CL_NEXTKERNEL_SET_ARG_0(var) CL_NEXTKERNEL_SET_ARG_N(0, var)
#define CL_NEXTKERNEL_SET_ARG(var) CL_NEXTKERNEL_SET_ARG_N(num++, var)

static void append_scrypt_compiler_options(struct _build_kernel_data *data, struct cgpu_info *cgpu, struct _algorithm_t *algorithm)
{
  char buf[255];
  sprintf(buf, " -D LOOKUP_GAP=%d -D CONCURRENT_THREADS=%u -D NFACTOR=%d",
          cgpu->lookup_gap, (unsigned int)cgpu->thread_concurrency, algorithm->nfactor);
  strcat(data->compiler_options, buf);

  sprintf(buf, "lg%utc%unf%u", cgpu->lookup_gap, (unsigned int)cgpu->thread_concurrency, algorithm->nfactor);
  strcat(data->binary_filename, buf);
}

static void append_hamsi_compiler_options(struct _build_kernel_data *data, struct cgpu_info *cgpu, struct _algorithm_t *algorithm)
{
  char buf[255];
  sprintf(buf, " -D SPH_HAMSI_EXPAND_BIG=%d",
          opt_hamsi_expand_big);
  strcat(data->compiler_options, buf);

  sprintf(buf, "big%u", (unsigned int)opt_hamsi_expand_big);
  strcat(data->binary_filename, buf);
}

static cl_int queue_scrypt_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  unsigned char *midstate = blk->work->midstate;
  cl_kernel *kernel = &clState->kernel;
  unsigned int num = 0;
  cl_uint le_target;
  cl_int status = 0;

  le_target = *(cl_uint *)(blk->work->device_target + 28);
  memcpy(clState->cldata, blk->work->data, 80);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(clState->padbuffer8);
  CL_SET_VARG(4, &midstate[0]);
  CL_SET_VARG(4, &midstate[16]);
  CL_SET_ARG(le_target);

  return status;
}

static cl_int queue_maxcoin_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel = &clState->kernel;
  unsigned int num = 0;
  cl_int status = 0;

  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->outputBuffer);

  return status;
}

static cl_int queue_sph_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel = &clState->kernel;
  unsigned int num = 0;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}

static cl_int queue_darkcoin_mod_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel;
  unsigned int num;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  // blake - search
  kernel = &clState->kernel;
  num = 0;
  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->padbuffer8);
  // bmw - search1
  kernel = clState->extra_kernels;
  CL_SET_ARG_0(clState->padbuffer8);
  // groestl - search2
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // skein - search3
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // jh - search4
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // keccak - search5
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // luffa - search6
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // cubehash - search7
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // shavite - search8
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // simd - search9
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // echo - search10
  num = 0;
  CL_NEXTKERNEL_SET_ARG(clState->padbuffer8);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}

static cl_int queue_bitblock_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel;
  unsigned int num;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  // blake - search
  kernel = &clState->kernel;
  num = 0;
  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->padbuffer8);
  // bmw - search1
  kernel = clState->extra_kernels;
  CL_SET_ARG_0(clState->padbuffer8);
  // groestl - search2
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // skein - search3
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // jh - search4
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // keccak - search5
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // luffa - search6
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // cubehash - search7
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // shavite - search8
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // simd - search9
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // echo - search10
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // hamsi - search11
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // fugue - search12
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // hamsi - search11
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // fugue - search12
  num = 0;
  CL_NEXTKERNEL_SET_ARG(clState->padbuffer8);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}

static cl_int queue_bitblockold_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel;
  unsigned int num;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  // blake - search
  kernel = &clState->kernel;
  num = 0;
  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->padbuffer8);
  // bmw - search1
  kernel = clState->extra_kernels;
  CL_SET_ARG_0(clState->padbuffer8);
  // groestl - search2
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // skein - search3
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // jh - search4
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // keccak - search5
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // luffa - search6
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // cubehash - search7
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // shavite - search8
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // simd - search9
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // combined echo, hamsi, fugue - shabal - whirlpool - search10
  num = 0;
  CL_NEXTKERNEL_SET_ARG(clState->padbuffer8);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}


static cl_int queue_marucoin_mod_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel;
  unsigned int num;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  // blake - search
  kernel = &clState->kernel;
  num = 0;
  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->padbuffer8);
  // bmw - search1
  kernel = clState->extra_kernels;
  CL_SET_ARG_0(clState->padbuffer8);
  // groestl - search2
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // skein - search3
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // jh - search4
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // keccak - search5
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // luffa - search6
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // cubehash - search7
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // shavite - search8
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // simd - search9
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // echo - search10
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // hamsi - search11
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // fugue - search12
  num = 0;
  CL_NEXTKERNEL_SET_ARG(clState->padbuffer8);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}

static cl_int queue_marucoin_mod_old_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel;
  unsigned int num;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  // blake - search
  kernel = &clState->kernel;
  num = 0;
  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->padbuffer8);
  // bmw - search1
  kernel = clState->extra_kernels;
  CL_SET_ARG_0(clState->padbuffer8);
  // groestl - search2
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // skein - search3
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // jh - search4
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // keccak - search5
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // luffa - search6
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // cubehash - search7
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // shavite - search8
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // simd - search9
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // combined echo, hamsi, fugue - search10
  num = 0;
  CL_NEXTKERNEL_SET_ARG(clState->padbuffer8);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}

static cl_int queue_talkcoin_mod_kernel(struct __clState *clState, struct _dev_blk_ctx *blk, __maybe_unused cl_uint threads)
{
  cl_kernel *kernel;
  unsigned int num;
  cl_ulong le_target;
  cl_int status = 0;

  le_target = *(cl_ulong *)(blk->work->device_target + 24);
  flip80(clState->cldata, blk->work->data);
  status = clEnqueueWriteBuffer(clState->commandQueue, clState->CLbuffer0, true, 0, 80, clState->cldata, 0, NULL,NULL);

  // blake - search
  kernel = &clState->kernel;
  num = 0;
  CL_SET_ARG(clState->CLbuffer0);
  CL_SET_ARG(clState->padbuffer8);
  // groestl - search1
  kernel = clState->extra_kernels;
  CL_SET_ARG_0(clState->padbuffer8);
  // jh - search2
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // keccak - search3
  CL_NEXTKERNEL_SET_ARG_0(clState->padbuffer8);
  // skein - search4
  num = 0;
  CL_NEXTKERNEL_SET_ARG(clState->padbuffer8);
  CL_SET_ARG(clState->outputBuffer);
  CL_SET_ARG(le_target);

  return status;
}

typedef struct _algorithm_settings_t {
  const char *name; /* Human-readable identifier */
  double   diff_multiplier1;
  double   diff_multiplier2;
  double   share_diff_multiplier;
  uint32_t xintensity_shift;
  uint32_t intensity_shift;
  uint32_t found_idx;
  unsigned long long   diff_nonce;
  unsigned long long   diff_numerator;
  uint32_t diff1targ;
  size_t n_extra_kernels;
  long rw_buffer_size;
  cl_command_queue_properties cq_properties;
  void     (*regenhash)(struct work *);
  cl_int   (*queue_kernel)(struct __clState *, struct _dev_blk_ctx *, cl_uint);
  void     (*gen_hash)(const unsigned char *, unsigned int, unsigned char *);
  void     (*set_compile_options)(build_kernel_data *, struct cgpu_info *, algorithm_t *);
} algorithm_settings_t;

static algorithm_settings_t algos[] = {
  // kernels starting from this will have difficulty calculated by using litecoin algorithm
#define A_SCRYPT(a) \
    { a, 1, 65536, 65536, 0, 0, 0xFF, 0x0000ffff00000000ULL, 0xFFFFFFFFULL, 0x0000ffffUL, 0, -1, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, scrypt_regenhash, queue_scrypt_kernel, gen_hash, append_scrypt_compiler_options}
  A_SCRYPT( "ckolivas" ),
  A_SCRYPT( "alexkarnew" ),
  A_SCRYPT( "alexkarnold" ),
  A_SCRYPT( "bufius" ),
  A_SCRYPT( "psw" ),
  A_SCRYPT( "zuikkis" ),
#undef A_SCRYPT

  // kernels starting from this will have difficulty calculated by using quarkcoin algorithm
#define A_QUARK(a, b) \
    { a, 256, 256, 256, 0, 0, 0xFF, 0x000000ffff000000ULL, 0xFFFFFFULL, 0x0000ffffUL, 0, 0, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, b, queue_sph_kernel, gen_hash, NULL}
  A_QUARK( "quarkcoin", quarkcoin_regenhash),
  A_QUARK( "qubitcoin", qubitcoin_regenhash),
  A_QUARK( "animecoin", animecoin_regenhash),
  A_QUARK( "sifcoin",   sifcoin_regenhash),
#undef A_QUARK

  // kernels starting from this will have difficulty calculated by using bitcoin algorithm
#define A_DARK(a, b) \
    { a, 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 0, 0, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, b, queue_sph_kernel, gen_hash, NULL}
  A_DARK( "darkcoin",           darkcoin_regenhash),
  A_DARK( "inkcoin",            inkcoin_regenhash),
  A_DARK( "myriadcoin-groestl", myriadcoin_groestl_regenhash),
#undef A_DARK

  { "twecoin", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 0, 0, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, twecoin_regenhash, queue_sph_kernel, sha256, NULL},
  { "maxcoin", 1, 256, 1, 4, 15, 0x0F, 0x00000000ffff0000ULL, 0xFFFFULL, 0x000000ffUL, 0, 0, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, maxcoin_regenhash, queue_maxcoin_kernel, sha256, NULL},
  { "darkcoin-mod", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 10, 8 * 16 * 4194304, 0, darkcoin_regenhash, queue_darkcoin_mod_kernel, gen_hash, NULL},

  { "marucoin", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 0, 0, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, marucoin_regenhash, queue_sph_kernel, gen_hash, append_hamsi_compiler_options},
  
  { "marucoin-mod", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 12, 8 * 16 * 4194304, 0, marucoin_regenhash, queue_marucoin_mod_kernel, gen_hash, append_hamsi_compiler_options},
  { "marucoin-modold", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 10, 8 * 16 * 4194304, 0, marucoin_regenhash, queue_marucoin_mod_old_kernel, gen_hash, append_hamsi_compiler_options},

  { "bitblock", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 14, 4 * 16 * 4194304, 0, bitblock_regenhash, queue_bitblock_kernel, gen_hash, append_hamsi_compiler_options},
  { "bitblockold", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 10, 4 * 16 * 4194304, 0, bitblock_regenhash, queue_bitblockold_kernel, gen_hash, append_hamsi_compiler_options},

  { "talkcoin-mod", 1, 1, 1, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 4,  8 * 16 * 4194304, 0, talkcoin_regenhash, queue_talkcoin_mod_kernel, gen_hash, NULL},

  // kernels starting from this will have difficulty calculated by using fuguecoin algorithm
#define A_FUGUE(a, b) \
    { a, 1, 256, 256, 0, 0, 0xFF, 0x00000000ffff0000ULL, 0xFFFFULL, 0x0000ffffUL, 0, 0, CL_QUEUE_OUT_OF_ORDER_EXEC_MODE_ENABLE, b, queue_sph_kernel, sha256, NULL}
  A_FUGUE( "fuguecoin",   fuguecoin_regenhash),
  A_FUGUE( "groestlcoin", groestlcoin_regenhash),
#undef A_FUGUE

  // Terminator (do not remove)
  { NULL, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL}
};

void copy_algorithm_settings(algorithm_t* dest, const char* algo)
{
  algorithm_settings_t* src;

  // Find algorithm settings and copy
  for (src = algos; src->name; src++) {
    if (strcmp(src->name, algo) == 0) {
      strcpy(dest->name, src->name);

      dest->diff_multiplier1 = src->diff_multiplier1;
      dest->diff_multiplier2 = src->diff_multiplier2;
      dest->share_diff_multiplier = src->share_diff_multiplier;
      dest->xintensity_shift = src->xintensity_shift;
      dest->intensity_shift = src->intensity_shift;
      dest->found_idx = src->found_idx;
      dest->diff_nonce = src->diff_nonce;
      dest->diff_numerator = src->diff_numerator;
      dest->diff1targ = src->diff1targ;
      dest->n_extra_kernels = src->n_extra_kernels;
      dest->rw_buffer_size = src->rw_buffer_size;
      dest->cq_properties = src->cq_properties;
      dest->regenhash = src->regenhash;
      dest->queue_kernel = src->queue_kernel;
      dest->gen_hash = src->gen_hash;
      dest->set_compile_options = src->set_compile_options;
      break;
    }
  }

  // if not found
  if (src->name == NULL) {
    applog(LOG_WARNING, "Algorithm %s not found, using %s.", algo, algos->name);
    copy_algorithm_settings(dest, algos->name);
  }
}

void set_algorithm(algorithm_t* algo, const char* newname_alias)
{
  const char* newname;
  //load previous algorithm nfactor in case nfactor was applied before algorithm... or default to 10
  uint8_t nfactor = ((algo->nfactor)?algo->nfactor:10); 

  // scrypt is default ckolivas kernel
  if(!strcasecmp(newname_alias, "scrypt"))
  {
    newname = "ckolivas";
    nfactor = 10;
  }
  // Adaptive N-factor Scrypt is default ckolivas kernel with nfactor 11
  else if ((strcasecmp(newname_alias, "adaptive-n-factor") == 0) ||
           (strcasecmp(newname_alias, "adaptive-nfactor") == 0) ||
           (strcasecmp(newname_alias, "nscrypt") == 0) ||
           (strcasecmp(newname_alias, "adaptive-nscrypt") == 0) ||
           (strcasecmp(newname_alias, "adaptive-n-scrypt") == 0)) 
  {
    newname = "ckolivas";
    nfactor = 11;
    // Not an alias
  }
  //x11mod -> darkcoin-mod
  else if(!strcasecmp(newname_alias, "x11mod"))
    newname = "darkcoin-mod";
  //x13mod -> marucoin-mod
  else if(!strcasecmp(newname_alias, "x13mod"))
    newname = "marucoin-mod";
  //x13modold -> marucoin-modold
  else if(!strcasecmp(newname_alias, "x13modold"))
    newname = "marucoin-modold";
  else
    newname = newname_alias;

  copy_algorithm_settings(algo, newname);

  // Doesn't matter for non-scrypt algorithms
  set_algorithm_nfactor(algo, nfactor);
}

void set_algorithm_nfactor(algorithm_t* algo, const uint8_t nfactor)
{
  algo->nfactor = nfactor;
  algo->n = (1 << nfactor);
}

bool cmp_algorithm(algorithm_t* algo1, algorithm_t* algo2)
{
  return (strcmp(algo1->name, algo2->name) == 0) &&
         (algo1->nfactor == algo2->nfactor);
}