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 <liboil/liboilfunction.h>

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

    35 #include <math.h>

    36 

    37 

    38 /**

    39  * oil_squaresum_f64:

    40  * @d:

    41  * @s:

    42  * @n:

    43  *

    44  * Sums the square of each element in @s and places the result in

    45  * @dest.

    46  */

    47 OIL_DEFINE_CLASS (squaresum_f64, "double *d, double *s, int n");

    48 

    49 static void

    50 squaresum_f64_ref(double *dest, double *src, int n)

    51 {

    52 	double sum2 = 0;

    53 	double errsum = 0;

    54 	double tmp;

    55 	double x;

    56 	int i;

    57 

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

    59 		tmp = sum2;

    60 		x = src[i]*src[i];

    61 		sum2 += x;

    62 		errsum += (tmp - sum2) + x;

    63 	}

    64 

    65 	*dest = sum2 + errsum;

    66 }

    67 OIL_DEFINE_IMPL_REF (squaresum_f64_ref, squaresum_f64);

    68 

    69 /**

    70  * oil_squaresum_shifted_s16:

    71  * @d:

    72  * @s:

    73  * @n:

    74  *

    75  * Square each element in @s and divide by (1<<15), and sum the

    76  * results, placing the final result in @d.

    77  */

    78 OIL_DEFINE_CLASS (squaresum_shifted_s16, "uint32_t *d, int16_t *s, int n");

    79 

    80 static void

    81 squaresum_shifted_s16_ref(uint32_t *dest, int16_t *src, int n)

    82 {

    83 	uint32_t sum2 = 0;

    84         uint32_t x;

    85 	int i;

    86 

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

    88 		x = (src[i]*src[i] + (1<<14)) >> 15;

    89 		sum2 += x;

    90 	}

    91 

    92 	*dest = sum2;

    93 }

    94 OIL_DEFINE_IMPL_REF (squaresum_shifted_s16_ref, squaresum_shifted_s16);

    95 

    96 

    97 

    98 #ifdef	__SYMBIAN32__

    99  

   100 OilFunctionClass* __oil_function_class_squaresum_f64() {

   101 		return &_oil_function_class_squaresum_f64;

   102 }

   103 #endif

   104 

   105 #ifdef	__SYMBIAN32__

   106  

   107 OilFunctionClass* __oil_function_class_squaresum_shifted_s16() {

   108 		return &_oil_function_class_squaresum_shifted_s16;

   109 }

   110 #endif

   111 

   112 

   113 

   114 #ifdef	__SYMBIAN32__

   115  

   116 OilFunctionImpl* __oil_function_impl_squaresum_f64_ref() {

   117 		return &_oil_function_impl_squaresum_f64_ref;

   118 }

   119 #endif

   120 

   121 #ifdef	__SYMBIAN32__

   122  

   123 OilFunctionImpl* __oil_function_impl_squaresum_shifted_s16_ref() {

   124 		return &_oil_function_impl_squaresum_shifted_s16_ref;

   125 }

   126 #endif

   127 

   128 

   129 

   130 #ifdef	__SYMBIAN32__

   131  

   132 EXPORT_C void** _oil_function_class_ptr_squaresum_f64 ()	{

   133 	oil_function_class_ptr_squaresum_f64 = __oil_function_class_squaresum_f64();

   134 	return &oil_function_class_ptr_squaresum_f64->func;

   135 	}

   136 #endif

   137 

   138 #ifdef	__SYMBIAN32__

   139  

   140 EXPORT_C void** _oil_function_class_ptr_squaresum_shifted_s16 ()	{

   141 	oil_function_class_ptr_squaresum_shifted_s16 = __oil_function_class_squaresum_shifted_s16();

   142 	return &oil_function_class_ptr_squaresum_shifted_s16->func;

   143 	}

   144 #endif

   145