//
// This file is part of the Bones source-to-source compiler examples. The C-code
// is largely identical in terms of functionality and variable naming to the code
// found in PolyBench/C version 3.2. For more information on PolyBench/C or Bones
// please use the contact information below.
//
// == More information on PolyBench/C
// Contact............Louis-Noel Pouchet <pouchet@cse.ohio-state.edu>
// Web address........http://polybench.sourceforge.net/
// 
// == More information on Bones
// Contact............Cedric Nugteren <c.nugteren@tue.nl>
// Web address........http://parse.ele.tue.nl/bones/
//
// == File information
// Filename...........benchmark/gemm.c
// Author.............Cedric Nugteren
// Last modified on...04-April-2012
//

#include "common.h"

// This is 'gemm', a general matrix multiplication kernel
int main(void) {
	int i,j,k;
	
	// Declare arrays on the stack
	float A[NI][NK];
	float B[NK][NJ];
	float C[NI][NJ];
	
	// Set the constants
	int alpha = 32412;
	int beta = 2123;
	
	// Set the input data
	for (i=0; i<NI; i++) {
		for (j=0; j<NK; j++) {
			A[i][j] = ((float) i*j) / NI;
		}
	}
	for (i=0; i<NK; i++) {
		for (j=0; j<NJ; j++) {
			B[i][j] = ((float) i*j) / NI;
		}
	}
	for (i=0; i<NI; i++) {
		for (j=0; j<NJ; j++) {
			C[i][j] = ((float) i*j) / NI;
		}
	}
	
	// Perform the computation (C := alpha*A*B + beta*C)
	#pragma species kernel 0:NI-1,0:NJ-1|element ^ 0:NI-1,0:NK-1|chunk(0:0,0:NK-1) ^ 0:NK-1,0:NJ-1|chunk(0:NK-1,0:0) -> 0:NI-1,0:NJ-1|element
	for (i=0; i<NI; i++) {
		for (j=0; j<NJ; j++) {
			C[i][j] *= beta;
			for (k=0; k<NK; k++) {
				C[i][j] += alpha * A[i][k] * B[k][j];
			}
		}
	}
	#pragma species endkernel gemm
	
	// Clean-up and exit the function
	fflush(stdout);
	return 0;
}