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./bm_kiss_float -x 40000 -n 1800

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improved from
cputime=6.010
to
cputime=5.940
This commit is contained in:
Mark Borgerding 2004-02-03 01:05:10 +00:00
parent 8e00ca1877
commit 210f219648
1 changed files with 9 additions and 5 deletions
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14
kiss_fft.c
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@ -250,21 +250,25 @@ void kf_work(
const kiss_fft_state * st const kiss_fft_state * st
) )
{ {
kiss_fft_cpx * tmpFout=Fout; kiss_fft_cpx * Fout_beg=Fout;
int m,p,r; kiss_fft_cpx * Fout_end;
int m,p;
p=*factors++; /* the radix */ p=*factors++; /* the radix */
m=*factors++; /* stage's fft length/p */ m=*factors++; /* stage's fft length/p */
Fout_end = Fout + p*m;
for (r=0;r<p;++r) { do{
if (m==1) if (m==1)
*Fout = *f; *Fout = *f;
else else
kf_work( Fout , f, fstride*p, in_stride, factors,st); kf_work( Fout , f, fstride*p, in_stride, factors,st);
Fout += m; Fout += m;
f += fstride*in_stride; f += fstride*in_stride;
} }while(Fout != Fout_end );
Fout=tmpFout; Fout=Fout_beg;
switch (p) { switch (p) {
case 2: kf_bfly2(Fout,fstride,st,m); break; case 2: kf_bfly2(Fout,fstride,st,m); break;