/* -*- mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
// vim:sts=8:sw=8:ts=8:noet:sr:cino=>s,f0,{0,g0,(0,\:0,t0,+0,=s
//#include "goto-def.h"

/* Copyright (c) FFLAS-FFPACK
* Written by Clément Pernet <clement.pernet@imag.fr>
* ========LICENCE========
* This file is part of the library FFLAS-FFPACK.
*
* FFLAS-FFPACK 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.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
* ========LICENCE========
*/

#include "fflas-ffpack/fflas-ffpack-config.h"
#include <iostream>
#include <givaro/modular.h>

#include "fflas-ffpack/config-blas.h"
#include "fflas-ffpack/fflas/fflas.h"
#include "fflas-ffpack/utils/timer.h"
#include "fflas-ffpack/utils/Matio.h"
#include "fflas-ffpack/utils/args-parser.h"

#ifdef __FFLASFFPACK_USE_OPENMP
typedef FFLAS::OMPTimer TTimer;
#else
typedef FFLAS::Timer TTimer;
#endif

#ifndef __SGEMM__
typedef double Floats;
#define CBLAS_GEMM cblas_dgemm
#else
typedef float Floats;
#define CBLAS_GEMM cblas_sgemm
#endif


using namespace std;

int main(int argc, char** argv) {
  
	size_t iter = 1;
	int    q    = 1009;
	size_t n    = 2000;
	std::string file1 = "";
	std::string file2 = "";
  
	Argument as[] = {
		{ 'q', "-q Q", "Set the field characteristic (-1 for random).",  TYPE_INT , &q },
		{ 'n', "-n N", "Set the dimension of the matrix.",               TYPE_INT , &n },
		{ 'i', "-i R", "Set number of repetitions.",                     TYPE_INT , &iter },
		{ 'f', "-f FILE", "Set the first input file (empty for random).",   TYPE_STR , &file1 },
		{ 'g', "-g FILE", "Set the second input file (empty for random).",  TYPE_STR , &file2 },
		END_OF_ARGUMENTS
	};

	FFLAS::parseArguments(argc,argv,as);


  typedef Givaro::ModularBalanced<Floats> Field;
  typedef Field::Element Element;

  Field F(q);

  TTimer chrono;
  double time=0.0;// time2=0.0;

  Element * A, * B, * C;

  if (iter>1) {
    if (!file1.empty()){
      A = read_field (F, file1.c_str(), &n, &n);
    }
    else{
      Field::RandIter G(F);
      A = FFLAS::fflas_new<Element>(n*n);
#pragma omp parallel for
      for (size_t i=0; i<n; ++i)
          for (size_t j=0; j<n; ++j)
              G.random(*(A+i*n+j));
    }

    if (!file2.empty()){
      B = read_field (F, file2.c_str(), &n, &n);
    }
    else{
      Field::RandIter G(F);
      B = FFLAS::fflas_new<Element>(n*n);
#pragma omp parallel for
      for (size_t i=0; i<n; ++i)
          for (size_t j=0; j<n; ++j)
              G.random(*(B+i*n+j));
    }

    C = FFLAS::fflas_new<Element>(n*n);

    CBLAS_GEMM (CblasRowMajor, CblasNoTrans, CblasNoTrans, n,n,n, F.one,
		 A, n, B, n, F.zero, C,n);

    FFLAS::fflas_delete( A);
    FFLAS::fflas_delete( B);
    FFLAS::fflas_delete( C);
  }

  for (size_t it=0;it<iter;++it){

    if (!file1.empty()){
      A = read_field (F, file1.c_str(), &n, &n);
    }
    else{
      Field::RandIter G(F);
      A = FFLAS::fflas_new<Element>(n*n);
#pragma omp parallel for
      for (size_t i=0; i<n; ++i)
          for (size_t j=0; j<n; ++j)
              G.random(*(A+i*n+j));
    }

    if (!file2.empty()){
      B = read_field (F, file2.c_str(), &n, &n);
    }
    else{
      Field::RandIter G(F);
      B = FFLAS::fflas_new<Element>(n*n);
#pragma omp parallel for
      for (size_t i=0; i<n; ++i)
          for (size_t j=0; j<n; ++j)
              G.random(*(B+i*n+j));
    }

    C = FFLAS::fflas_new<Element>(n*n);

    chrono.clear();
    chrono.start();
    CBLAS_GEMM (CblasRowMajor, CblasNoTrans, CblasNoTrans, n,n,n, F.one,
		 A, n, B, n, F.zero, C,n);
    chrono.stop();
    time+=chrono.usertime();

    FFLAS::fflas_delete( A);
    FFLAS::fflas_delete( B);
    FFLAS::fflas_delete( C);
  }
  
	// -----------
	// Standard output for benchmark - Alexis Breust 2014/11/14
	std::cout << "Time: " << time / double(iter)
			  << " Gflops: " << (2.*double(n)/1000.*double(n)/1000.*double(n)/1000.0) / time * double(iter);
	FFLAS::writeCommandString(std::cout, as) << std::endl; 

  return 0;
}