sgminer/kernel/bmw256.cl

/*
* bmw256 kernel implementation.
*
* ==========================(LICENSE BEGIN)============================
* Copyright (c) 2015 djm34
* 
*
* 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   djm34
*/



#define shl(x, n)            ((x) << (n))
#define shr(x, n)            ((x) >> (n))
//#define SHR(x, n) SHR2(x, n) 
//#define SHL(x, n) SHL2(x, n) 


#define SPH_ROTL32(x,n) rotate(x,(uint)n)
#define ss0(x)  (shr((x), 1) ^ shl((x), 3) ^ SPH_ROTL32((x),  4) ^ SPH_ROTL32((x), 19))
#define ss1(x)  (shr((x), 1) ^ shl((x), 2) ^ SPH_ROTL32((x),  8) ^ SPH_ROTL32((x), 23))
#define ss2(x)  (shr((x), 2) ^ shl((x), 1) ^ SPH_ROTL32((x), 12) ^ SPH_ROTL32((x), 25))
#define ss3(x)  (shr((x), 2) ^ shl((x), 2) ^ SPH_ROTL32((x), 15) ^ SPH_ROTL32((x), 29))
#define ss4(x)  (shr((x), 1) ^ (x))
#define ss5(x)  (shr((x), 2) ^ (x))
#define rs1(x) SPH_ROTL32((x),  3)
#define rs2(x) SPH_ROTL32((x),  7)
#define rs3(x) SPH_ROTL32((x), 13)
#define rs4(x) SPH_ROTL32((x), 16)
#define rs5(x) SPH_ROTL32((x), 19)
#define rs6(x) SPH_ROTL32((x), 23)
#define rs7(x) SPH_ROTL32((x), 27)

/* Message expansion function 1 */
uint expand32_1(int i, uint *M32, uint *H, uint *Q)
{

	return (ss1(Q[i - 16]) + ss2(Q[i - 15]) + ss3(Q[i - 14]) + ss0(Q[i - 13])
		+ ss1(Q[i - 12]) + ss2(Q[i - 11]) + ss3(Q[i - 10]) + ss0(Q[i - 9])
		+ ss1(Q[i - 8]) + ss2(Q[i - 7]) + ss3(Q[i - 6]) + ss0(Q[i - 5])
		+ ss1(Q[i - 4]) + ss2(Q[i - 3]) + ss3(Q[i - 2]) + ss0(Q[i - 1])
		+ ((i*(0x05555555ul) + SPH_ROTL32(M32[(i - 16) % 16], ((i - 16) % 16) + 1) + SPH_ROTL32(M32[(i - 13) % 16], ((i - 13) % 16) + 1) - SPH_ROTL32(M32[(i - 6) % 16], ((i - 6) % 16) + 1)) ^ H[(i - 16 + 7) % 16]));

}

/* Message expansion function 2 */
uint expand32_2(int i, uint *M32, uint *H, uint *Q)
{

	return (Q[i - 16] + rs1(Q[i - 15]) + Q[i - 14] + rs2(Q[i - 13])
		+ Q[i - 12] + rs3(Q[i - 11]) + Q[i - 10] + rs4(Q[i - 9])
		+ Q[i - 8] + rs5(Q[i - 7]) + Q[i - 6] + rs6(Q[i - 5])
		+ Q[i - 4] + rs7(Q[i - 3]) + ss4(Q[i - 2]) + ss5(Q[i - 1])
		+ ((i*(0x05555555ul) + SPH_ROTL32(M32[(i - 16) % 16], ((i - 16) % 16) + 1) + SPH_ROTL32(M32[(i - 13) % 16], ((i - 13) % 16) + 1) - SPH_ROTL32(M32[(i - 6) % 16], ((i - 6) % 16) + 1)) ^ H[(i - 16 + 7) % 16]));

}

void Compression256(uint *M32, uint *H)
{

	int i;
	uint XL32, XH32, Q[32];


	Q[0] = (M32[5] ^ H[5]) - (M32[7] ^ H[7]) + (M32[10] ^ H[10]) + (M32[13] ^ H[13]) + (M32[14] ^ H[14]);
	Q[1] = (M32[6] ^ H[6]) - (M32[8] ^ H[8]) + (M32[11] ^ H[11]) + (M32[14] ^ H[14]) - (M32[15] ^ H[15]);
	Q[2] = (M32[0] ^ H[0]) + (M32[7] ^ H[7]) + (M32[9] ^ H[9]) - (M32[12] ^ H[12]) + (M32[15] ^ H[15]);
	Q[3] = (M32[0] ^ H[0]) - (M32[1] ^ H[1]) + (M32[8] ^ H[8]) - (M32[10] ^ H[10]) + (M32[13] ^ H[13]);
	Q[4] = (M32[1] ^ H[1]) + (M32[2] ^ H[2]) + (M32[9] ^ H[9]) - (M32[11] ^ H[11]) - (M32[14] ^ H[14]);
	Q[5] = (M32[3] ^ H[3]) - (M32[2] ^ H[2]) + (M32[10] ^ H[10]) - (M32[12] ^ H[12]) + (M32[15] ^ H[15]);
	Q[6] = (M32[4] ^ H[4]) - (M32[0] ^ H[0]) - (M32[3] ^ H[3]) - (M32[11] ^ H[11]) + (M32[13] ^ H[13]);
	Q[7] = (M32[1] ^ H[1]) - (M32[4] ^ H[4]) - (M32[5] ^ H[5]) - (M32[12] ^ H[12]) - (M32[14] ^ H[14]);
	Q[8] = (M32[2] ^ H[2]) - (M32[5] ^ H[5]) - (M32[6] ^ H[6]) + (M32[13] ^ H[13]) - (M32[15] ^ H[15]);
	Q[9] = (M32[0] ^ H[0]) - (M32[3] ^ H[3]) + (M32[6] ^ H[6]) - (M32[7] ^ H[7]) + (M32[14] ^ H[14]);
	Q[10] = (M32[8] ^ H[8]) - (M32[1] ^ H[1]) - (M32[4] ^ H[4]) - (M32[7] ^ H[7]) + (M32[15] ^ H[15]);
	Q[11] = (M32[8] ^ H[8]) - (M32[0] ^ H[0]) - (M32[2] ^ H[2]) - (M32[5] ^ H[5]) + (M32[9] ^ H[9]);
	Q[12] = (M32[1] ^ H[1]) + (M32[3] ^ H[3]) - (M32[6] ^ H[6]) - (M32[9] ^ H[9]) + (M32[10] ^ H[10]);
	Q[13] = (M32[2] ^ H[2]) + (M32[4] ^ H[4]) + (M32[7] ^ H[7]) + (M32[10] ^ H[10]) + (M32[11] ^ H[11]);
	Q[14] = (M32[3] ^ H[3]) - (M32[5] ^ H[5]) + (M32[8] ^ H[8]) - (M32[11] ^ H[11]) - (M32[12] ^ H[12]);
	Q[15] = (M32[12] ^ H[12]) - (M32[4] ^ H[4]) - (M32[6] ^ H[6]) - (M32[9] ^ H[9]) + (M32[13] ^ H[13]);

	/*  Diffuse the differences in every word in a bijective manner with ssi, and then add the values of the previous double pipe.*/
	Q[0] = ss0(Q[0]) + H[1];
	Q[1] = ss1(Q[1]) + H[2];
	Q[2] = ss2(Q[2]) + H[3];
	Q[3] = ss3(Q[3]) + H[4];
	Q[4] = ss4(Q[4]) + H[5];
	Q[5] = ss0(Q[5]) + H[6];
	Q[6] = ss1(Q[6]) + H[7];
	Q[7] = ss2(Q[7]) + H[8];
	Q[8] = ss3(Q[8]) + H[9];
	Q[9] = ss4(Q[9]) + H[10];
	Q[10] = ss0(Q[10]) + H[11];
	Q[11] = ss1(Q[11]) + H[12];
	Q[12] = ss2(Q[12]) + H[13];
	Q[13] = ss3(Q[13]) + H[14];
	Q[14] = ss4(Q[14]) + H[15];
	Q[15] = ss0(Q[15]) + H[0];

	/* This is the Message expansion or f_1 in the documentation.       */
	/* It has 16 rounds.                                                */
	/* Blue Midnight Wish has two tunable security parameters.          */
	/* The parameters are named EXPAND_1_ROUNDS and EXPAND_2_ROUNDS.    */
	/* The following relation for these parameters should is satisfied: */
	/* EXPAND_1_ROUNDS + EXPAND_2_ROUNDS = 16                           */

	for (i = 0; i<2; i++)
		Q[i + 16] = expand32_1(i + 16, M32, H, Q);

	for (i = 2; i<16; i++)
		Q[i + 16] = expand32_2(i + 16, M32, H, Q);

	/* Blue Midnight Wish has two temporary cummulative variables that accumulate via XORing */
	/* 16 new variables that are prooduced in the Message Expansion part.                    */
	XL32 = Q[16] ^ Q[17] ^ Q[18] ^ Q[19] ^ Q[20] ^ Q[21] ^ Q[22] ^ Q[23];
	XH32 = XL32^Q[24] ^ Q[25] ^ Q[26] ^ Q[27] ^ Q[28] ^ Q[29] ^ Q[30] ^ Q[31];


	/*  This part is the function f_2 - in the documentation            */

	/*  Compute the double chaining pipe for the next message block.    */
	H[0] = (shl(XH32, 5) ^ shr(Q[16], 5) ^ M32[0]) + (XL32    ^ Q[24] ^ Q[0]);
	H[1] = (shr(XH32, 7) ^ shl(Q[17], 8) ^ M32[1]) + (XL32    ^ Q[25] ^ Q[1]);
	H[2] = (shr(XH32, 5) ^ shl(Q[18], 5) ^ M32[2]) + (XL32    ^ Q[26] ^ Q[2]);
	H[3] = (shr(XH32, 1) ^ shl(Q[19], 5) ^ M32[3]) + (XL32    ^ Q[27] ^ Q[3]);
	H[4] = (shr(XH32, 3) ^ Q[20] ^ M32[4]) + (XL32    ^ Q[28] ^ Q[4]);
	H[5] = (shl(XH32, 6) ^ shr(Q[21], 6) ^ M32[5]) + (XL32    ^ Q[29] ^ Q[5]);
	H[6] = (shr(XH32, 4) ^ shl(Q[22], 6) ^ M32[6]) + (XL32    ^ Q[30] ^ Q[6]);
	H[7] = (shr(XH32, 11) ^ shl(Q[23], 2) ^ M32[7]) + (XL32    ^ Q[31] ^ Q[7]);

	H[8] = SPH_ROTL32(H[4], 9) + (XH32     ^     Q[24] ^ M32[8]) + (shl(XL32, 8) ^ Q[23] ^ Q[8]);
	H[9] = SPH_ROTL32(H[5], 10) + (XH32     ^     Q[25] ^ M32[9]) + (shr(XL32, 6) ^ Q[16] ^ Q[9]);
	H[10] = SPH_ROTL32(H[6], 11) + (XH32     ^     Q[26] ^ M32[10]) + (shl(XL32, 6) ^ Q[17] ^ Q[10]);
	H[11] = SPH_ROTL32(H[7], 12) + (XH32     ^     Q[27] ^ M32[11]) + (shl(XL32, 4) ^ Q[18] ^ Q[11]);
	H[12] = SPH_ROTL32(H[0], 13) + (XH32     ^     Q[28] ^ M32[12]) + (shr(XL32, 3) ^ Q[19] ^ Q[12]);
	H[13] = SPH_ROTL32(H[1], 14) + (XH32     ^     Q[29] ^ M32[13]) + (shr(XL32, 4) ^ Q[20] ^ Q[13]);
	H[14] = SPH_ROTL32(H[2], 15) + (XH32     ^     Q[30] ^ M32[14]) + (shr(XL32, 7) ^ Q[21] ^ Q[14]);
	H[15] = SPH_ROTL32(H[3], 16) + (XH32     ^     Q[31] ^ M32[15]) + (shr(XL32, 2) ^ Q[22] ^ Q[15]);

}