ref: dac77d134471a02a4d5b8260650882b2a7517a83
dir: /silk/float/silk_inner_product_FLP.c/
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#include "silk_SigProc_FLP.h"
/* inner product of two SKP_float arrays, with result as double */
double silk_inner_product_FLP( /* O result */
const SKP_float *data1, /* I vector 1 */
const SKP_float *data2, /* I vector 2 */
opus_int dataSize /* I length of vectors */
)
{
opus_int i, dataSize4;
double result;
/* 4x unrolled loop */
result = 0.0f;
dataSize4 = dataSize & 0xFFFC;
for( i = 0; i < dataSize4; i += 4 ) {
result += data1[ i + 0 ] * data2[ i + 0 ] +
data1[ i + 1 ] * data2[ i + 1 ] +
data1[ i + 2 ] * data2[ i + 2 ] +
data1[ i + 3 ] * data2[ i + 3 ];
}
/* add any remaining products */
for( ; i < dataSize; i++ ) {
result += data1[ i ] * data2[ i ];
}
return result;
}