#include <stdio.h>
#include <memory.h>

#include "cuda_helper.h"

extern cudaError_t MyStreamSynchronize(cudaStream_t stream, int situation, int thr_id);

__constant__ uint64_t c_PaddedMessage80[16]; // padded message (80 bytes + padding)

static __constant__ uint64_t stateo[25];
static __constant__ uint64_t RC[24];
static const uint64_t cpu_RC[24] = {
	0x0000000000000001ull, 0x0000000000008082ull,
	0x800000000000808aull, 0x8000000080008000ull,
	0x000000000000808bull, 0x0000000080000001ull,
	0x8000000080008081ull, 0x8000000000008009ull,
	0x000000000000008aull, 0x0000000000000088ull,
	0x0000000080008009ull, 0x000000008000000aull,
	0x000000008000808bull, 0x800000000000008bull,
	0x8000000000008089ull, 0x8000000000008003ull,
	0x8000000000008002ull, 0x8000000000000080ull,
	0x000000000000800aull, 0x800000008000000aull,
	0x8000000080008081ull, 0x8000000000008080ull,
	0x0000000080000001ull, 0x8000000080008008ull
};

__device__ __forceinline__
static void keccak_block(uint64_t *s, const uint64_t *keccak_round_constants)
{
	size_t i;
	uint64_t t[5], u[5], v, w;

	/* absorb input */

	//#pragma unroll
	for (i = 0; i < 24; i++) {
		/* theta: c = a[0,i] ^ a[1,i] ^ .. a[4,i] */

		t[0] = s[0] ^ s[5] ^ s[10] ^ s[15] ^ s[20];
		t[1] = s[1] ^ s[6] ^ s[11] ^ s[16] ^ s[21];
		t[2] = s[2] ^ s[7] ^ s[12] ^ s[17] ^ s[22];
		t[3] = s[3] ^ s[8] ^ s[13] ^ s[18] ^ s[23];
		t[4] = s[4] ^ s[9] ^ s[14] ^ s[19] ^ s[24];

		/* theta: d[i] = c[i+4] ^ rotl(c[i+1],1) */

		uint64_t temp0,temp1,temp2,temp3,temp4;
		temp0 = ROTL64(t[0], 1);
		temp1 = ROTL64(t[1], 1);
		temp2 = ROTL64(t[2], 1);
		temp3 = ROTL64(t[3], 1);
		temp4 = ROTL64(t[4], 1);
		u[0] = xor1(t[4],temp1);
		u[1] = xor1(t[0],temp2);
		u[2] = xor1(t[1],temp3);
		u[3] = xor1(t[2],temp4);
		u[4] = xor1(t[3],temp0);

		/*
		u[0] = t[4] ^ ROTL64(t[1], 1);
		u[1] = t[0] ^ ROTL64(t[2], 1);
		u[2] = t[1] ^ ROTL64(t[3], 1);
		u[3] = t[2] ^ ROTL64(t[4], 1);
		u[4] = t[3] ^ ROTL64(t[0], 1);
		*/
		/* theta: a[0,i], a[1,i], .. a[4,i] ^= d[i] */
		s[0] ^= u[0]; s[5] ^= u[0]; s[10] ^= u[0]; s[15] ^= u[0]; s[20] ^= u[0];
		s[1] ^= u[1]; s[6] ^= u[1]; s[11] ^= u[1]; s[16] ^= u[1]; s[21] ^= u[1];
		s[2] ^= u[2]; s[7] ^= u[2]; s[12] ^= u[2]; s[17] ^= u[2]; s[22] ^= u[2];
		s[3] ^= u[3]; s[8] ^= u[3]; s[13] ^= u[3]; s[18] ^= u[3]; s[23] ^= u[3];
		s[4] ^= u[4]; s[9] ^= u[4]; s[14] ^= u[4]; s[19] ^= u[4]; s[24] ^= u[4];

		/* rho pi: b[..] = rotl(a[..], ..) */
		v = s[ 1];
		s[ 1] = ROTL64(s[ 6], 44);
		s[ 6] = ROTL64(s[ 9], 20);
		s[ 9] = ROTL64(s[22], 61);
		s[22] = ROTL64(s[14], 39);
		s[14] = ROTL64(s[20], 18);
		s[20] = ROTL64(s[ 2], 62);
		s[ 2] = ROTL64(s[12], 43);
		s[12] = ROTL64(s[13], 25);
		s[13] = ROTL64(s[19],  8);
		s[19] = ROTL64(s[23], 56);
		s[23] = ROTL64(s[15], 41);
		s[15] = ROTL64(s[ 4], 27);
		s[ 4] = ROTL64(s[24], 14);
		s[24] = ROTL64(s[21],  2);
		s[21] = ROTL64(s[ 8], 55);
		s[ 8] = ROTL64(s[16], 45);
		s[16] = ROTL64(s[ 5], 36);
		s[ 5] = ROTL64(s[ 3], 28);
		s[ 3] = ROTL64(s[18], 21);
		s[18] = ROTL64(s[17], 15);
		s[17] = ROTL64(s[11], 10);
		s[11] = ROTL64(s[ 7],  6);
		s[ 7] = ROTL64(s[10],  3);
		s[10] = ROTL64(    v,  1);

		/* chi: a[i,j] ^= ~b[i,j+1] & b[i,j+2] */
	//	chi(s[0],s[1],s[2],s[3],s[4]);
	//	chi(s[5],s[6],s[7],s[8],s[9]);
	//	chi(s[10],s[11],s[12],s[13],s[14]);
	//	chi(s[15],s[16],s[17],s[18],s[19]);
	//	chi(s[20],s[21],s[22],s[23],s[24]);

		v = s[ 0]; w = s[ 1];
		s[ 0] ^= (~w) & s[ 2];
		s[ 1] ^= (~s[ 2]) & s[ 3];
		s[ 2] ^= (~s[ 3]) & s[ 4];
		s[ 3] ^= (~s[ 4]) & v;
		s[ 4] ^= (~v) & w;
		v = s[ 5]; w = s[ 6];
		s[ 5] ^= (~w) & s[ 7];
		s[ 6] ^= (~s[ 7]) & s[ 8];
		s[ 7] ^= (~s[ 8]) & s[ 9];
		s[ 8] ^= (~s[ 9]) & v;
		s[ 9] ^= (~v) & w;
		v = s[10]; w = s[11];
		s[10] ^= (~w) & s[12];
		s[11] ^= (~s[12]) & s[13];
		s[12] ^= (~s[13]) & s[14];
		s[13] ^= (~s[14]) & v;
		s[14] ^= (~v) & w;
		v = s[15]; w = s[16];
		s[15] ^= (~w) & s[17];
		s[16] ^= (~s[17]) & s[18];
		s[17] ^= (~s[18]) & s[19];
		s[18] ^= (~s[19]) & v;
		s[19] ^= (~v) & w;
		v = s[20]; w = s[21];
		s[20] ^= (~w) & s[22];
		s[21] ^= (~s[22]) & s[23];
		s[22] ^= (~s[23]) & s[24];
		s[23] ^= (~s[24]) & v;
		s[24] ^= (~v) & w;

		/* iota: a[0,0] ^= round constant */
		s[0] ^= keccak_round_constants[i];
	}
}

__host__ __forceinline__
static void keccak_block_host(uint64_t *s, const uint64_t *keccak_round_constants)
{
	size_t i;
	uint64_t t[5], u[5], v, w;

	/* absorb input */

	for (i = 0; i < 24; i++) {
		/* theta: c = a[0,i] ^ a[1,i] ^ .. a[4,i] */
		t[0] = s[0] ^ s[5] ^ s[10] ^ s[15] ^ s[20];
		t[1] = s[1] ^ s[6] ^ s[11] ^ s[16] ^ s[21];
		t[2] = s[2] ^ s[7] ^ s[12] ^ s[17] ^ s[22];
		t[3] = s[3] ^ s[8] ^ s[13] ^ s[18] ^ s[23];
		t[4] = s[4] ^ s[9] ^ s[14] ^ s[19] ^ s[24];

		/* theta: d[i] = c[i+4] ^ rotl(c[i+1],1) */
		u[0] = t[4] ^ ROTL64(t[1], 1);
		u[1] = t[0] ^ ROTL64(t[2], 1);
		u[2] = t[1] ^ ROTL64(t[3], 1);
		u[3] = t[2] ^ ROTL64(t[4], 1);
		u[4] = t[3] ^ ROTL64(t[0], 1);

		/* theta: a[0,i], a[1,i], .. a[4,i] ^= d[i] */
		s[0] ^= u[0]; s[5] ^= u[0]; s[10] ^= u[0]; s[15] ^= u[0]; s[20] ^= u[0];
		s[1] ^= u[1]; s[6] ^= u[1]; s[11] ^= u[1]; s[16] ^= u[1]; s[21] ^= u[1];
		s[2] ^= u[2]; s[7] ^= u[2]; s[12] ^= u[2]; s[17] ^= u[2]; s[22] ^= u[2];
		s[3] ^= u[3]; s[8] ^= u[3]; s[13] ^= u[3]; s[18] ^= u[3]; s[23] ^= u[3];
		s[4] ^= u[4]; s[9] ^= u[4]; s[14] ^= u[4]; s[19] ^= u[4]; s[24] ^= u[4];

		/* rho pi: b[..] = rotl(a[..], ..) */
		v = s[ 1];
		s[ 1] = ROTL64(s[ 6], 44);
		s[ 6] = ROTL64(s[ 9], 20);
		s[ 9] = ROTL64(s[22], 61);
		s[22] = ROTL64(s[14], 39);
		s[14] = ROTL64(s[20], 18);
		s[20] = ROTL64(s[ 2], 62);
		s[ 2] = ROTL64(s[12], 43);
		s[12] = ROTL64(s[13], 25);
		s[13] = ROTL64(s[19],  8);
		s[19] = ROTL64(s[23], 56);
		s[23] = ROTL64(s[15], 41);
		s[15] = ROTL64(s[ 4], 27);
		s[ 4] = ROTL64(s[24], 14);
		s[24] = ROTL64(s[21],  2);
		s[21] = ROTL64(s[ 8], 55);
		s[ 8] = ROTL64(s[16], 45);
		s[16] = ROTL64(s[ 5], 36);
		s[ 5] = ROTL64(s[ 3], 28);
		s[ 3] = ROTL64(s[18], 21);
		s[18] = ROTL64(s[17], 15);
		s[17] = ROTL64(s[11], 10);
		s[11] = ROTL64(s[ 7],  6);
		s[ 7] = ROTL64(s[10],  3);
		s[10] = ROTL64(    v,  1);

		/* chi: a[i,j] ^= ~b[i,j+1] & b[i,j+2] */
		v = s[ 0]; w = s[ 1]; s[ 0] ^= (~w) & s[ 2]; s[ 1] ^= (~s[ 2]) & s[ 3]; s[ 2] ^= (~s[ 3]) & s[ 4]; s[ 3] ^= (~s[ 4]) & v; s[ 4] ^= (~v) & w;
		v = s[ 5]; w = s[ 6]; s[ 5] ^= (~w) & s[ 7]; s[ 6] ^= (~s[ 7]) & s[ 8]; s[ 7] ^= (~s[ 8]) & s[ 9]; s[ 8] ^= (~s[ 9]) & v; s[ 9] ^= (~v) & w;
		v = s[10]; w = s[11]; s[10] ^= (~w) & s[12]; s[11] ^= (~s[12]) & s[13]; s[12] ^= (~s[13]) & s[14]; s[13] ^= (~s[14]) & v; s[14] ^= (~v) & w;
		v = s[15]; w = s[16]; s[15] ^= (~w) & s[17]; s[16] ^= (~s[17]) & s[18]; s[17] ^= (~s[18]) & s[19]; s[18] ^= (~s[19]) & v; s[19] ^= (~v) & w;
		v = s[20]; w = s[21]; s[20] ^= (~w) & s[22]; s[21] ^= (~s[22]) & s[23]; s[22] ^= (~s[23]) & s[24]; s[23] ^= (~s[24]) & v; s[24] ^= (~v) & w;

		/* iota: a[0,0] ^= round constant */
		s[0] ^= keccak_round_constants[i];
	}
}

__global__ /* __launch_bounds__(256, 2) */
void m7_keccak512_gpu_hash_120(int threads, uint32_t startNounce, uint64_t *outputHash)
{
	int thread = (blockDim.x * blockIdx.x + threadIdx.x);
	if (thread < threads)
	{
		uint32_t nounce = startNounce + thread;

		uint64_t state[25];

		#pragma unroll 16
		for (int i=9;i<25;i++) {state[i]=stateo[i];}

		state[0] = xor1(stateo[0],c_PaddedMessage80[9]);
		state[1] = xor1(stateo[1],c_PaddedMessage80[10]);
		state[2] = xor1(stateo[2],c_PaddedMessage80[11]);
		state[3] = xor1(stateo[3],c_PaddedMessage80[12]);
		state[4] = xor1(stateo[4],c_PaddedMessage80[13]);
		state[5] = xor1(stateo[5],REPLACE_HIWORD(c_PaddedMessage80[14],nounce));
		state[6] = xor1(stateo[6],c_PaddedMessage80[15]);
		state[7] = stateo[7];
		state[8] = xor1(stateo[8],0x8000000000000000);

		keccak_block(state,RC);

		#pragma unroll 8
		for (int i=0;i<8;i++) {
			outputHash[i*threads+thread] = state[i];
		}
	} //thread
}


void m7_keccak512_cpu_init(int thr_id, int threads)
{
	cudaMemcpyToSymbol( RC,cpu_RC,sizeof(cpu_RC),0,cudaMemcpyHostToDevice);
}

__host__ void m7_keccak512_setBlock_120(void *pdata)
{
	unsigned char PaddedMessage[128];
	uint8_t ending =0x01;

	memcpy(PaddedMessage, pdata, 122);
	memset(PaddedMessage+122,ending,1);
	memset(PaddedMessage+123, 0, 5);
	cudaMemcpyToSymbol( c_PaddedMessage80, PaddedMessage, 16*sizeof(uint64_t), 0, cudaMemcpyHostToDevice);
	uint64_t* alt_data = (uint64_t*) pdata;
	uint64_t state[25];
	for(int i=0;i<9;i++)
		state[i] = alt_data[i];
	for(int i=10;i<25;i++)
		state[i] = 0;
	keccak_block_host(state,cpu_RC);

	cudaMemcpyToSymbol(stateo, state, 25*sizeof(uint64_t), 0, cudaMemcpyHostToDevice);
}


__host__ void m7_keccak512_cpu_hash(int thr_id, int threads, uint32_t startNounce, uint64_t *d_hash, int order)
{
	const int threadsperblock = 256;

	dim3 grid((threads + threadsperblock-1)/threadsperblock);
	dim3 block(threadsperblock);

	size_t shared_size = 0;

	m7_keccak512_gpu_hash_120<<<grid, block, shared_size>>>(threads, startNounce, d_hash);
	MyStreamSynchronize(NULL, order, thr_id);
}