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     27 
     28 #ifdef HAVE_CONFIG_H
     29 #include "config.h"
     30 #endif
     31 
     32 #include "SigProc_FLP.h"
     33 
     34 /* inner product of two silk_float arrays, with result as double */
     35 double silk_inner_product_FLP(
     36     const silk_float    *data1,
     37     const silk_float    *data2,
     38     opus_int            dataSize
     39 )
     40 {
     41     opus_int  i, dataSize4;
     42     double   result;
     43 
     44     /* 4x unrolled loop */
     45     result = 0.0;
     46     dataSize4 = dataSize & 0xFFFC;
     47     for( i = 0; i < dataSize4; i += 4 ) {
     48         result += data1[ i + 0 ] * (double)data2[ i + 0 ] +
     49                   data1[ i + 1 ] * (double)data2[ i + 1 ] +
     50                   data1[ i + 2 ] * (double)data2[ i + 2 ] +
     51                   data1[ i + 3 ] * (double)data2[ i + 3 ];
     52     }
     53 
     54     /* add any remaining products */
     55     for( ; i < dataSize; i++ ) {
     56         result += data1[ i ] * (double)data2[ i ];
     57     }
     58 
     59     return result;
     60 }
     61