1 /*

     2  * LIBOIL - Library of Optimized Inner Loops

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

     4  * All rights reserved.

     5  *

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

     7  * modification, are permitted provided that the following conditions

     8  * are met:

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

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

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

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

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

    14  * 

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

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

    17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

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

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

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

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

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

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

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

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

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

    28 

    29 #ifdef HAVE_CONFIG_H

    30 #include "config.h"

    31 #endif

    32 

    33 #include <liboilfunction.h>

    34 #include "liboil/simdpack/simdpack.h"

    35 #include <math.h>

    36 

    37 /**

    38  * oil_diffsquaresum_f32:

    39  * @d_1:

    40  * @src1:

    41  * @sstr1:

    42  * @src2:

    43  * @sstr2:

    44  * @n:

    45  *

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

    47  * and places the result in @d_1.

    48  */

    49 OIL_DEFINE_CLASS (diffsquaresum_f32,

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

    51 

    52 static void

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

    54     int sstr2, int n)

    55 {

    56 	double sum = 0;

    57 	double errsum = 0;

    58 	double tmp;

    59 	double x;

    60 	int i;

    61 

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

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

    64                   OIL_GET(src2, i*sstr2, float);

    65 		x = x*x;

    66 		tmp = sum;

    67 		sum += x;

    68 		errsum += (tmp - sum) + x;

    69 	}

    70 

    71 	*dest = sum + errsum;

    72 }

    73 

    74 OIL_DEFINE_IMPL_REF (diffsquaresum_f32_ref, diffsquaresum_f32);

    75 

    76 

    77 

    78 

    79 #ifdef	__SYMBIAN32__

    80  

    81 OilFunctionClass* __oil_function_class_diffsquaresum_f32() {

    82 		return &_oil_function_class_diffsquaresum_f32;

    83 }

    84 #endif

    85 

    86 

    87 

    88 #ifdef	__SYMBIAN32__

    89  

    90 OilFunctionImpl* __oil_function_impl_diffsquaresum_f32_ref() {

    91 		return &_oil_function_impl_diffsquaresum_f32_ref;

    92 }

    93 #endif

    94 

    95 

    96 

    97 #ifdef	__SYMBIAN32__

    98  

    99 EXPORT_C void** _oil_function_class_ptr_diffsquaresum_f32 ()	{

   100 	oil_function_class_ptr_diffsquaresum_f32 = __oil_function_class_diffsquaresum_f32();

   101 	return &oil_function_class_ptr_diffsquaresum_f32->func;

   102 	}

   103 #endif

   104