liboil/simdpack/squaresum_f64.c

   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
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <liboil/liboilfunction.h>
  33 #include <liboil/simdpack/simdpack.h>
  34 #include <math.h>
  35
  36 static void
  37 squaresum_f64_i10_simple(double *dest, double *src, int n)
  38 {
  39         double sum2 = 0;
  40         int i;
  41
  42         for(i=0;i<n;i++){
  43                 sum2 += src[i]*src[i];
  44         }
  45
  46         *dest = sum2;
  47 }
  48 OIL_DEFINE_IMPL (squaresum_f64_i10_simple, squaresum_f64);
  49
  50 #if 0
  51 #include <multsum_f64.h>
  52 static void
  53 squaresum_f64_i10_multsum(double *dest, double *src, int n)
  54 {
  55         multsum_f64(dest,src,src,n);
  56 }
  57 #endif
  58
  59 static void
  60 squaresum_f64_i10_unroll4a(double *dest, double *src, int n)
  61 {
  62         double sum1 = 0;
  63         double sum2 = 0;
  64         double sum3 = 0;
  65         double sum4 = 0;
  66
  67         while(n&0x3){
  68                 sum1 += *src * *src;
  69                 src++;
  70                 n--;
  71         }
  72         while(n>0){
  73                 sum1 += *src * *src;
  74                 src++;
  75                 sum2 += *src * *src;
  76                 src++;
  77                 sum3 += *src * *src;
  78                 src++;
  79                 sum4 += *src * *src;
  80                 src++;
  81                 n-=4;
  82         }
  83
  84         *dest = sum1 + sum2 + sum3 + sum4;
  85 }
  86 OIL_DEFINE_IMPL (squaresum_f64_i10_unroll4a, squaresum_f64);
  87
  88 static void
  89 squaresum_f64_i10_unroll4(double *dest, double *src, int n)
  90 {
  91         double sum1 = 0;
  92         double sum2 = 0;
  93         double sum3 = 0;
  94         double sum4 = 0;
  95         int i;
  96
  97         while(n&0x3){
  98                 sum1 += src[0]*src[0];
  99                 src++;
 100                 n--;
 101         }
 102         for(i=0;i<n;i+=4){
 103                 sum1 += src[i]*src[i];
 104                 sum2 += src[i+1]*src[i+1];
 105                 sum3 += src[i+2]*src[i+2];
 106                 sum4 += src[i+3]*src[i+3];
 107         }
 108
 109         *dest = sum1 + sum2 + sum3 + sum4;
 110 }
 111 OIL_DEFINE_IMPL (squaresum_f64_i10_unroll4, squaresum_f64);
 112
 113 static void
 114 squaresum_f64_i10_unroll8(double *dest, double *src, int n)
 115 {
 116         double sum1 = 0;
 117         double sum2 = 0;
 118         double sum3 = 0;
 119         double sum4 = 0;
 120         double sum5 = 0;
 121         double sum6 = 0;
 122         double sum7 = 0;
 123         double sum8 = 0;
 124         int i;
 125
 126         while(n&0x7){
 127                 sum1 += src[0]*src[0];
 128                 src++;
 129                 n--;
 130         }
 131         for(i=0;i<n;i+=8){
 132                 sum1 += src[i]*src[i];
 133                 sum2 += src[i+1]*src[i+1];
 134                 sum3 += src[i+2]*src[i+2];
 135                 sum4 += src[i+3]*src[i+3];
 136                 sum5 += src[i+4]*src[i+4];
 137                 sum6 += src[i+5]*src[i+5];
 138                 sum7 += src[i+6]*src[i+6];
 139                 sum8 += src[i+7]*src[i+7];
 140         }
 141
 142         *dest = sum1 + sum2 + sum3 + sum4 + sum5 + sum6 + sum7 + sum8;
 143 }
 144 OIL_DEFINE_IMPL (squaresum_f64_i10_unroll8, squaresum_f64);
 145