#include <stdio.h>
#include <memory.h>
#include <sys/types.h> // off_t

#include "cuda_helper.h"

#define U32TO64_LE(p) \
	(((uint64_t)(*p)) | (((uint64_t)(*(p + 1))) << 32))

#define U64TO32_LE(p, v) \
	*p = (uint32_t)((v)); *(p+1) = (uint32_t)((v) >> 32);

static const uint64_t host_keccak_round_constants[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
};

__constant__ uint64_t d_keccak_round_constants[24];

__device__ __forceinline__
static void keccak_block(uint2 *s)
{
	size_t i;
	uint2 t[5], u[5], v, w;

	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] ^ ROL2(t[1], 1);
		u[1] = t[0] ^ ROL2(t[2], 1);
		u[2] = t[1] ^ ROL2(t[3], 1);
		u[3] = t[2] ^ ROL2(t[4], 1);
		u[4] = t[3] ^ ROL2(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]  = ROL2(s[6], 44);
		s[6]  = ROL2(s[9], 20);
		s[9]  = ROL2(s[22], 61);
		s[22] = ROL2(s[14], 39);
		s[14] = ROL2(s[20], 18);
		s[20] = ROL2(s[2], 62);
		s[2]  = ROL2(s[12], 43);
		s[12] = ROL2(s[13], 25);
		s[13] = ROL2(s[19], 8);
		s[19] = ROL2(s[23], 56);
		s[23] = ROL2(s[15], 41);
		s[15] = ROL2(s[4], 27);
		s[4]  = ROL2(s[24], 14);
		s[24] = ROL2(s[21], 2);
		s[21] = ROL2(s[8], 55);
		s[8]  = ROL2(s[16], 45);
		s[16] = ROL2(s[5], 36);
		s[5]  = ROL2(s[3], 28);
		s[3]  = ROL2(s[18], 21);
		s[18] = ROL2(s[17], 15);
		s[17] = ROL2(s[11], 10);
		s[11] = ROL2(s[7], 6);
		s[7]  = ROL2(s[10], 3);
		s[10] = ROL2(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] ^= vectorize(d_keccak_round_constants[i]);
	}
}

__global__
void quark_keccak512_gpu_hash_64(uint32_t threads, uint32_t startNounce, uint64_t *g_hash, uint32_t *g_nonceVector)
{
	uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x);
	if (thread < threads)
	{
		uint32_t nounce = (g_nonceVector != NULL) ? g_nonceVector[thread] : (startNounce + thread);

		off_t hashPosition = nounce - startNounce;
		uint64_t *inpHash = &g_hash[hashPosition * 8];
		uint2 keccak_gpu_state[25];

		for (int i = 0; i<8; i++) {
			keccak_gpu_state[i] = vectorize(inpHash[i]);
		}
		keccak_gpu_state[8] = vectorize(0x8000000000000001ULL);

		for (int i=9; i<25; i++) {
			keccak_gpu_state[i] = make_uint2(0, 0);
		}
		keccak_block(keccak_gpu_state);

		for(int i=0; i<8; i++) {
			inpHash[i] = devectorize(keccak_gpu_state[i]);
		}
	}
}

__device__ __forceinline__
static void keccak_block_v30(uint64_t *s, const uint32_t *in)
{
	size_t i;
	uint64_t t[5], u[5], v, w;

	#pragma unroll 9
	for (i = 0; i < 72 / 8; i++, in += 2)
		s[i] ^= U32TO64_LE(in);

	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] ^= d_keccak_round_constants[i];
	}
}

__global__
void quark_keccak512_gpu_hash_64_v30(uint32_t threads, uint32_t startNounce, uint64_t *g_hash, uint32_t *g_nonceVector)
{
	uint32_t thread = (blockDim.x * blockIdx.x + threadIdx.x);
	if (thread < threads)
	{
		uint32_t nounce = (g_nonceVector != NULL) ? g_nonceVector[thread] : (startNounce + thread);

		off_t hashPosition = nounce - startNounce;
		uint32_t *inpHash = (uint32_t*)&g_hash[hashPosition * 8];

		uint32_t message[18];
		#pragma unroll 16
		for(int i=0;i<16;i++)
			message[i] = inpHash[i];

		message[16] = 0x01;
		message[17] = 0x80000000;

		uint64_t keccak_gpu_state[25];
		#pragma unroll 25
		for (int i=0; i<25; i++)
			keccak_gpu_state[i] = 0;

		keccak_block_v30(keccak_gpu_state, message);

		uint32_t hash[16];
		#pragma unroll 8
		for (size_t i = 0; i < 64; i += 8) {
			U64TO32_LE((&hash[i/4]), keccak_gpu_state[i / 8]);
		}

		uint32_t *outpHash = (uint32_t*)&g_hash[hashPosition * 8];
		#pragma unroll 16
		for(int i=0; i<16; i++)
			outpHash[i] = hash[i];
	}
}

__host__
void quark_keccak512_cpu_hash_64(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_nonceVector, uint32_t *d_hash, int order)
{
	const uint32_t threadsperblock = 256;

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

	int dev_id = device_map[thr_id];

	if (device_sm[dev_id] >= 320)
		quark_keccak512_gpu_hash_64<<<grid, block>>>(threads, startNounce, (uint64_t*)d_hash, d_nonceVector);
	else
		quark_keccak512_gpu_hash_64_v30<<<grid, block>>>(threads, startNounce, (uint64_t*)d_hash, d_nonceVector);

	MyStreamSynchronize(NULL, order, thr_id);
}

void jackpot_keccak512_cpu_init(int thr_id, uint32_t threads);
void jackpot_keccak512_cpu_setBlock(void *pdata, size_t inlen);
void jackpot_keccak512_cpu_hash(int thr_id, uint32_t threads, uint32_t startNounce, uint32_t *d_hash, int order);

__host__
void quark_keccak512_cpu_init(int thr_id, uint32_t threads)
{
	// required for the 64 bytes one
	cudaMemcpyToSymbol(d_keccak_round_constants, host_keccak_round_constants,
			sizeof(host_keccak_round_constants), 0, cudaMemcpyHostToDevice);

	jackpot_keccak512_cpu_init(thr_id, threads);
}

__host__
void keccak512_setBlock_80(int thr_id, uint32_t *endiandata)
{
	jackpot_keccak512_cpu_setBlock((void*)endiandata, 80);
}

__host__
void keccak512_cuda_hash_80(const int thr_id, const uint32_t threads, const uint32_t startNounce, uint32_t *d_hash)
{
	jackpot_keccak512_cpu_hash(thr_id, threads, startNounce, d_hash, 0);
}