sl@0: /*
sl@0:  * LIBOIL - Library of Optimized Inner Loops
sl@0:  * Copyright (c) 2003,2004 David A. Schleef <ds@schleef.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
sl@0:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
sl@0:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
sl@0:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
sl@0:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
sl@0:  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
sl@0:  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
sl@0:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
sl@0:  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
sl@0:  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
sl@0:  * POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0: //Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 
sl@0: 
sl@0: #ifdef HAVE_CONFIG_H
sl@0: #include "config.h"
sl@0: #endif
sl@0: 
sl@0: #include <liboilfunction.h>
sl@0: #include "liboil/simdpack/simdpack.h"
sl@0: #include <math.h>
sl@0: 
sl@0: /**
sl@0:  * oil_diffsquaresum_f32:
sl@0:  * @d_1:
sl@0:  * @src1:
sl@0:  * @sstr1:
sl@0:  * @src2:
sl@0:  * @sstr2:
sl@0:  * @n:
sl@0:  *
sl@0:  * Calculates the sum of squared differences between @src1 and @src2
sl@0:  * and places the result in @d_1.
sl@0:  */
sl@0: OIL_DEFINE_CLASS (diffsquaresum_f32,
sl@0:     "float *d_1, float *src1, int sstr1, float *src2, int sstr2, int n");
sl@0: 
sl@0: static void
sl@0: diffsquaresum_f32_ref(float *dest, float *src1, int sstr1, float *src2,
sl@0:     int sstr2, int n)
sl@0: {
sl@0: 	double sum = 0;
sl@0: 	double errsum = 0;
sl@0: 	double tmp;
sl@0: 	double x;
sl@0: 	int i;
sl@0: 
sl@0: 	for(i=0;i<n;i++){
sl@0: 		x = OIL_GET(src1, i*sstr1, float) -
sl@0:                   OIL_GET(src2, i*sstr2, float);
sl@0: 		x = x*x;
sl@0: 		tmp = sum;
sl@0: 		sum += x;
sl@0: 		errsum += (tmp - sum) + x;
sl@0: 	}
sl@0: 
sl@0: 	*dest = sum + errsum;
sl@0: }
sl@0: 
sl@0: OIL_DEFINE_IMPL_REF (diffsquaresum_f32_ref, diffsquaresum_f32);
sl@0: 
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionClass* __oil_function_class_diffsquaresum_f32() {
sl@0: 		return &_oil_function_class_diffsquaresum_f32;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: OilFunctionImpl* __oil_function_impl_diffsquaresum_f32_ref() {
sl@0: 		return &_oil_function_impl_diffsquaresum_f32_ref;
sl@0: }
sl@0: #endif
sl@0: 
sl@0: 
sl@0: 
sl@0: #ifdef	__SYMBIAN32__
sl@0:  
sl@0: EXPORT_C void** _oil_function_class_ptr_diffsquaresum_f32 ()	{
sl@0: 	oil_function_class_ptr_diffsquaresum_f32 = __oil_function_class_diffsquaresum_f32();
sl@0: 	return &oil_function_class_ptr_diffsquaresum_f32->func;
sl@0: 	}
sl@0: #endif
sl@0: