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slightly faster

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This commit is contained in:
Mark Borgerding 2003-11-07 03:23:19 +00:00
parent 1486d89291
commit 3a5791f203
1 changed files with 5 additions and 4 deletions
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9
kiss_fft.c
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@ -317,14 +317,15 @@ void bfly_generic(
for ( q=1 ; q<p ; ++q ) { for ( q=1 ; q<p ; ++q ) {
C_MUL( scratch[q] , Fout[ m*q ] , tw[u*fstride*q] ); C_MUL( scratch[q] , Fout[ m*q ] , tw[u*fstride*q] );
Fout[ m*q ] = scratch[0]; Fout[ m*q ] = scratch[0];
C_ADDTO(*Fout , scratch[q] );
} }
for ( q=1; q<p ; ++q ) { for ( q=1; q<p ; ++q ) {
int twidx = q*fsm;
C_ADDTO(*Fout , scratch[q] );
Foutlo=Fout; Foutlo=Fout;
Fouthi=Fout + mp; Fouthi=Fout + mp;
for ( d=1; d<=halfp;++d) { for ( d=1; d<=halfp;++d) {
Foutlo += m; Foutlo += m;
@ -369,7 +370,7 @@ void fft_work(
switch (p) { switch (p) {
case 2: bfly2(Fout,fstride,st,m); break; case 2: bfly2(Fout,fstride,st,m); break;
#if 0 #if 0
case 3: bfly3(Fout,fstride,st,m); break; case 3: bfly3(Fout,fstride,st,m); break;
#endif #endif
case 4: bfly4(Fout,fstride,st,m); break; case 4: bfly4(Fout,fstride,st,m); break;