/*

 * 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 <liboil/liboilfunction.h>

#include "liboil/simdpack/simdpack.h"

#include <math.h>

static void

diffsquaresum_f64_i10_simple(double *dest, double *src1, int sstr1, double *src2,

    int sstr2, int n)

{

	double sum = 0;

	double x;

	int i;

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

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

                  OIL_GET(src2, i*sstr2, double);

		x = x*x;

		sum += x;

	}

	*dest = sum;

}

OIL_DEFINE_IMPL (diffsquaresum_f64_i10_simple, diffsquaresum_f64);

static void

diffsquaresum_f64_i10_fast(double *dest, double *src1, int sstr1, double *src2,

    int sstr2, int n)

{

	double sum0 = 0;

	double x;

	while(n>0){

		x = *src1 - *src2;

		sum0 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		n--;

	}

	*dest = sum0;

}

OIL_DEFINE_IMPL (diffsquaresum_f64_i10_fast, diffsquaresum_f64);

static void

diffsquaresum_f64_i10_unroll2(double *dest, double *src1, int sstr1, double *src2,

    int sstr2, int n)

{

	double sum0 = 0;

	double sum1 = 0;

	double x;

	if(n&1){

		x = *src1 - *src2;

		sum0 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		n--;

	}

	while(n>0){

		x = *src1 - *src2;

		sum0 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		x = *src1 - *src2;

		sum1 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		n-=2;

	}

	*dest = sum0 + sum1;

}

OIL_DEFINE_IMPL (diffsquaresum_f64_i10_unroll2, diffsquaresum_f64);

static void

diffsquaresum_f64_i10_unroll4(double *dest, double *src1, int sstr1,

	double *src2, int sstr2, int n)

{

	double sum0 = 0;

	double sum1 = 0;

	double sum2 = 0;

	double sum3 = 0;

	double x;

	while(n&3){

		x = *src1 - *src2;

		sum0 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		n--;

	}

	while(n>0){

		x = *src1 - *src2;

		sum0 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		x = *src1 - *src2;

		sum1 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		x = *src1 - *src2;

		sum2 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		x = *src1 - *src2;

		sum3 += x * x;

		OIL_INCREMENT (src1, sstr1);

		OIL_INCREMENT (src2, sstr2);

		n-=4;

	}

	*dest = sum0 + sum1 + sum2 + sum3;

}

OIL_DEFINE_IMPL (diffsquaresum_f64_i10_unroll4, diffsquaresum_f64);

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_diffsquaresum_f64_i10_simple() {

		return &_oil_function_impl_diffsquaresum_f64_i10_simple;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_diffsquaresum_f64_i10_fast() {

		return &_oil_function_impl_diffsquaresum_f64_i10_fast;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_diffsquaresum_f64_i10_unroll2() {

		return &_oil_function_impl_diffsquaresum_f64_i10_unroll2;

}

#endif

#ifdef	__SYMBIAN32__

OilFunctionImpl* __oil_function_impl_diffsquaresum_f64_i10_unroll4() {

		return &_oil_function_impl_diffsquaresum_f64_i10_unroll4;

}

#endif