diff --git a/silk/float/warped_autocorrelation_FLP.c b/silk/float/warped_autocorrelation_FLP.c index 09186e73d463d2aef1a7ae170dba69e145713300..116dab923f3226dfa387902e91b998fe42c9a337 100644 --- a/silk/float/warped_autocorrelation_FLP.c +++ b/silk/float/warped_autocorrelation_FLP.c @@ -54,11 +54,13 @@ void silk_warped_autocorrelation_FLP( /* Loop over allpass sections */ for( i = 0; i < order; i += 2 ) { /* Output of allpass section */ - tmp2 = state[ i ] + warping * ( state[ i + 1 ] - tmp1 ); + /* We voluntarily use two multiples instead of factoring the expression to + reduce the length of the dependency chain (tmp1->tmp2->tmp1... ). */ + tmp2 = state[ i ] + warping * state[ i + 1 ] - warping * tmp1; state[ i ] = tmp1; C[ i ] += state[ 0 ] * tmp1; /* Output of allpass section */ - tmp1 = state[ i + 1 ] + warping * ( state[ i + 2 ] - tmp2 ); + tmp1 = state[ i + 1 ] + warping * state[ i + 2 ] - warping * tmp2; state[ i + 1 ] = tmp2; C[ i + 1 ] += state[ 0 ] * tmp2; }