/* StarPU --- Runtime system for heterogeneous multicore architectures.
 *
 * Copyright (C) 2009, 2010-2012  Université de Bordeaux 1
 * Copyright (C) 2010, 2011, 2012, 2013  Centre National de la Recherche Scientifique
 *
 * StarPU is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * StarPU is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * See the GNU Lesser General Public License in COPYING.LGPL for more details.
 */

#ifndef __DW_FACTO_LU_H__
#define __DW_FACTO_LU_H__

#include <semaphore.h>
#include <string.h>
#include <math.h>
#include <sys/time.h>
#include <starpu.h>
#ifdef STARPU_USE_CUDA
#include <cuda.h>
#include <cuda_runtime.h>
#include <cublas.h>
#endif

#include "../common/blas.h"

#include "lu_kernels_model.h"

#define FPRINTF(ofile, fmt, ...) do { if (!getenv("STARPU_SSILENT")) {fprintf(ofile, fmt, ## __VA_ARGS__); }} while(0)

#define BLAS3_FLOP(n1,n2,n3)    \
        (2*((uint64_t)n1)*((uint64_t)n2)*((uint64_t)n3))

typedef struct
{
	starpu_data_handle_t dataA;
	unsigned i;
	unsigned j;
	unsigned k;
	unsigned nblocks;
	unsigned *remaining;
} cl_args;

#ifdef CHECK_RESULTS
static void STARPU_ATTRIBUTE_UNUSED compare_A_LU(float *A, float *LU,
				unsigned size, unsigned ld)
{
	unsigned i,j;
	float *L;
	float *U;

	L = malloc(size*size*sizeof(float));
	U = malloc(size*size*sizeof(float));

	memset(L, 0, size*size*sizeof(float));
	memset(U, 0, size*size*sizeof(float));

	/* only keep the lower part */
	for (j = 0; j < size; j++)
	{
		for (i = 0; i < j; i++)
		{
			L[j+i*size] = LU[j+i*ld];
		}

		/* diag i = j */
		L[j+j*size] = LU[j+j*ld];
		U[j+j*size] = 1.0f;

		for (i = j+1; i < size; i++)
		{
			U[j+i*size] = LU[j+i*ld];
		}
	}

#if 0
	/* display L */
	FPRINTF(stdout, "(LU): \n");
	for (j = 0; j < size; j++)
	{
		for (i = 0; i < size; i++)
		{
/*			if (i <= j)
			{ */
				FPRINTF(stdout, "%2.2f\t", LU[j +i*size]);
/*			}
			else
			{
				FPRINTF(stdout, ".\t");
			} */
		}
		FPRINTF(stdout, "\n");
	}



	/* display L */
	FPRINTF(stdout, "L: \n");
	for (j = 0; j < size; j++)
	{
		for (i = 0; i < size; i++)
		{
/*			if (i <= j)
			{ */
				FPRINTF(stdout, "%2.2f\t", L[j +i*size]);
/*			}
			else
			{
				FPRINTF(stdout, ".\t");
			} */
		}
		FPRINTF(stdout, "\n");
	}

	/* display U */
	FPRINTF(stdout, "U: \n");
	for (j = 0; j < size; j++)
	{
		for (i = 0; i < size; i++)
		{
/*			if (i <= j)
			{ */
				FPRINTF(stdout, "%2.2f\t", U[j +i*size]);
/*			}
			else
			{
				FPRINTF(stdout, ".\t");
			} */
		}
		FPRINTF(stdout, "\n");
	}

#endif


        /* now A_err = L, compute L*U */
	STRMM("R", "U", "N", "U", size, size, 1.0f, U, size, L, size);

	float max_err = 0.0f;
	for (i = 0; i < size ; i++)
	{
		for (j = 0; j < size; j++) 
		{
			max_err = STARPU_MAX(max_err, fabs(  L[j+i*size] - A[j+i*ld]  ));
		}
	}

#if 0
	/* display A */
	FPRINTF(stdout, "A: \n");
	for (j = 0; j < size; j++)
	{
		for (i = 0; i < size; i++)
		{
	/*		if (i <= j)
			{ */
	      			FPRINTF(stdout, "%2.2f\t", A[j +i*size]);
	/*		}
			else
			{
				FPRINTF(stdout, ".\t");
			} */
		}
		FPRINTF(stdout, "\n");
	}


	/* display LU */
	FPRINTF(stdout, "LU: \n");
	for (j = 0; j < size; j++)
	{
		for (i = 0; i < size; i++)
		{
	/*		if (i <= j)
			{ */
	      			FPRINTF(stdout, "%2.2f\t", L[j +i*size]);
	/*		}
			else
			{
				FPRINTF(stdout, ".\t");
			} */
		}
		FPRINTF(stdout, "\n");
	}
#endif

	FPRINTF(stdout, "max error between A and L*U = %f \n", max_err);
}
#endif /* CHECK_RESULTS */

void dw_cpu_codelet_update_u11(void **, void *);
void dw_cpu_codelet_update_u12(void **, void *);
void dw_cpu_codelet_update_u21(void **, void *);
void dw_cpu_codelet_update_u22(void **, void *);

#ifdef STARPU_USE_CUDA
void dw_cublas_codelet_update_u11(void *descr[], void *_args);
void dw_cublas_codelet_update_u12(void *descr[], void *_args);
void dw_cublas_codelet_update_u21(void *descr[], void *_args);
void dw_cublas_codelet_update_u22(void *descr[], void *_args);
#endif

void dw_callback_codelet_update_u11(void *);
void dw_callback_codelet_update_u12_21(void *);
void dw_callback_codelet_update_u22(void *);

void dw_callback_v2_codelet_update_u11(void *);
void dw_callback_v2_codelet_update_u12(void *);
void dw_callback_v2_codelet_update_u21(void *);
void dw_callback_v2_codelet_update_u22(void *);

extern struct starpu_perfmodel model_11;
extern struct starpu_perfmodel model_12;
extern struct starpu_perfmodel model_21;
extern struct starpu_perfmodel model_22;

#endif /* __DW_FACTO_LU_H__ */
