thodg/cgminer/libbitfury.c

• Show log

  Commit

• Hash : 2486b9ce
  Author :
  Date : 2014-01-04T14:29:11
  

  Export reused components of bitfury management into a libbitfury and use for bab and bitfury drivers.

Download

• libbitfury.c

• /*
   * Copyright 2014 Con Kolivas
   * Copyright 2013 Andrew Smith
   * Copyright 2013 bitfury
   *
   * 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 "sha2.h"
  void ms3steps(uint32_t *p)
  {
  	uint32_t a, b, c, d, e, f, g, h, new_e, new_a;
  	int i;
  
  	a = p[0];
  	b = p[1];
  	c = p[2];
  	d = p[3];
  	e = p[4];
  	f = p[5];
  	g = p[6];
  	h = p[7];
  	for (i = 0; i < 3; i++) {
  		new_e = p[i+16] + sha256_k[i] + h + CH(e,f,g) + SHA256_F2(e) + d;
  		new_a = p[i+16] + sha256_k[i] + h + CH(e,f,g) + SHA256_F2(e) +
  			SHA256_F1(a) + MAJ(a,b,c);
  		d = c;
  		c = b;
  		b = a;
  		a = new_a;
  		h = g;
  		g = f;
  		f = e;
  		e = new_e;
  	}
  	p[15] = a;
  	p[14] = b;
  	p[13] = c;
  	p[12] = d;
  	p[11] = e;
  	p[10] = f;
  	p[9] = g;
  	p[8] = h;
  }
  
  uint32_t decnonce(uint32_t in)
  {
  	uint32_t out;
  
  	/* First part load */
  	out = (in & 0xFF) << 24;
  	in >>= 8;
  
  	/* Byte reversal */
  	in = (((in & 0xaaaaaaaa) >> 1) | ((in & 0x55555555) << 1));
  	in = (((in & 0xcccccccc) >> 2) | ((in & 0x33333333) << 2));
  	in = (((in & 0xf0f0f0f0) >> 4) | ((in & 0x0f0f0f0f) << 4));
  
  	out |= (in >> 2) & 0x3FFFFF;
  
  	/* Extraction */
  	if (in & 1)
  		out |= (1 << 23);
  	if (in & 2)
  		out |= (1 << 22);
  
  	out -= 0x800004;
  	return out;
  }
  

Download