/*

 * LIBOIL - Library of Optimized Inner Loops

 * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 * 

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,

 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,

 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING

 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

 * POSSIBILITY OF SUCH DAMAGE.

 */

//Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include <liboilfunction.h>

#include "liboil/simdpack/simdpack.h"

#include <math.h>

/**

 * oil_diffsquaresum_f32:

 * @d_1:

 * @src1:

 * @sstr1:

 * @src2:

 * @sstr2:

 * @n:

 *

 * Calculates the sum of squared differences between @src1 and @src2

 * and places the result in @d_1.

 */

OIL_DEFINE_CLASS (diffsquaresum_f32,

    "float *d_1, float *src1, int sstr1, float *src2, int sstr2, int n");

static void

diffsquaresum_f32_ref(float *dest, float *src1, int sstr1, float *src2,

    int sstr2, int n)

{

	double sum = 0;

	double errsum = 0;

	double tmp;

	double x;

	int i;

	for(i=0;i<n;i++){

		x = OIL_GET(src1, i*sstr1, float) -

                  OIL_GET(src2, i*sstr2, float);

		x = x*x;

		tmp = sum;

		sum += x;

		errsum += (tmp - sum) + x;

	}

	*dest = sum + errsum;

}

OIL_DEFINE_IMPL_REF (diffsquaresum_f32_ref, diffsquaresum_f32);

#ifdef	__SYMBIAN32__

OilFunctionClass* __oil_function_class_diffsquaresum_f32() {

		return &_oil_function_class_diffsquaresum_f32;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_diffsquaresum_f32_ref() {

		return &_oil_function_impl_diffsquaresum_f32_ref;

}

#endif

#ifdef	__SYMBIAN32__

EXPORT_C void** _oil_function_class_ptr_diffsquaresum_f32 ()	{

	oil_function_class_ptr_diffsquaresum_f32 = __oil_function_class_diffsquaresum_f32();

	return &oil_function_class_ptr_diffsquaresum_f32->func;

	}

#endif