/*

  * 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