| static private dradfg ( int ido, int ip, int l1, int idl1, float cc, float c1, float c2, float ch, float ch2, float wa, int index ) : void | ||
| ido | int | |
| ip | int | |
| l1 | int | |
| idl1 | int | |
| cc | float | |
| c1 | float | |
| c2 | float | |
| ch | float | |
| ch2 | float | |
| wa | float | |
| index | int | |
| return | void | |
static void dradfg(int ido,int ip,int l1,int idl1,float[] cc,float[] c1,
float[] c2, float[] ch, float[] ch2, float[] wa, int index)
{
int idij,ipph,i,j,k,l,ic,ik,iis;
int t0,t1,t2=0,t3,t4,t5,t6,t7,t8,t9,t10;
float dc2,ai1,ai2,ar1,ar2,ds2;
int nbd;
float dcp=0,arg,dsp=0,ar1h,ar2h;
int idp2,ipp2;
arg=tpi/(float)ip;
dcp=(float)Math.Cos(arg);
dsp=(float)Math.Sin(arg);
ipph=(ip+1)>>1;
ipp2=ip;
idp2=ido;
nbd=(ido-1)>>1;
t0=l1*ido;
t10=ip*ido;
if(ido==1) goto L119;
for(ik=0;ik<idl1;ik++)ch2[ik]=c2[ik];
t1=0;
for(j=1;j<ip;j++)
{
t1+=t0;
t2=t1;
for(k=0;k<l1;k++)
{
ch[t2]=c1[t2];
t2+=ido;
}
}
iis=-ido;
t1=0;
if(nbd>l1)
{
for(j=1;j<ip;j++)
{
t1+=t0;
iis+=ido;
t2= -ido+t1;
for(k=0;k<l1;k++)
{
idij=iis-1;
t2+=ido;
t3=t2;
for(i=2;i<ido;i+=2)
{
idij+=2;
t3+=2;
ch[t3-1]=wa[index+idij-1]*c1[t3-1]+wa[index+idij]*c1[t3];
ch[t3]=wa[index+idij-1]*c1[t3]-wa[index+idij]*c1[t3-1];
}
}
}
}
else
{
for(j=1;j<ip;j++)
{
iis+=ido;
idij=iis-1;
t1+=t0;
t2=t1;
for(i=2;i<ido;i+=2)
{
idij+=2;
t2+=2;
t3=t2;
for(k=0;k<l1;k++)
{
ch[t3-1]=wa[index+idij-1]*c1[t3-1]+wa[index+idij]*c1[t3];
ch[t3]=wa[index+idij-1]*c1[t3]-wa[index+idij]*c1[t3-1];
t3+=ido;
}
}
}
}
t1=0;
t2=ipp2*t0;
if(nbd<l1)
{
for(j=1;j<ipph;j++)
{
t1+=t0;
t2-=t0;
t3=t1;
t4=t2;
for(i=2;i<ido;i+=2)
{
t3+=2;
t4+=2;
t5=t3-ido;
t6=t4-ido;
for(k=0;k<l1;k++)
{
t5+=ido;
t6+=ido;
c1[t5-1]=ch[t5-1]+ch[t6-1];
c1[t6-1]=ch[t5]-ch[t6];
c1[t5]=ch[t5]+ch[t6];
c1[t6]=ch[t6-1]-ch[t5-1];
}
}
}
}
else
{
for(j=1;j<ipph;j++)
{
t1+=t0;
t2-=t0;
t3=t1;
t4=t2;
for(k=0;k<l1;k++)
{
t5=t3;
t6=t4;
for(i=2;i<ido;i+=2)
{
t5+=2;
t6+=2;
c1[t5-1]=ch[t5-1]+ch[t6-1];
c1[t6-1]=ch[t5]-ch[t6];
c1[t5]=ch[t5]+ch[t6];
c1[t6]=ch[t6-1]-ch[t5-1];
}
t3+=ido;
t4+=ido;
}
}
}
L119: for(ik=0;ik<idl1;ik++)c2[ik]=ch2[ik];
t1=0;
t2=ipp2*idl1;
for(j=1;j<ipph;j++)
{
t1+=t0;
t2-=t0;
t3=t1-ido;
t4=t2-ido;
for(k=0;k<l1;k++)
{
t3+=ido;
t4+=ido;
c1[t3]=ch[t3]+ch[t4];
c1[t4]=ch[t4]-ch[t3];
}
}
ar1=1.0f;
ai1=0.0f;
t1=0;
t2=ipp2*idl1;
t3=(ip-1)*idl1;
for(l=1;l<ipph;l++)
{
t1+=idl1;
t2-=idl1;
ar1h=dcp*ar1-dsp*ai1;
ai1=dcp*ai1+dsp*ar1;
ar1=ar1h;
t4=t1;
t5=t2;
t6=t3;
t7=idl1;
for(ik=0;ik<idl1;ik++)
{
ch2[t4++]=c2[ik]+ar1*c2[t7++];
ch2[t5++]=ai1*c2[t6++];
}
dc2=ar1;
ds2=ai1;
ar2=ar1;
ai2=ai1;
t4=idl1;
t5=(ipp2-1)*idl1;
for(j=2;j<ipph;j++)
{
t4+=idl1;
t5-=idl1;
ar2h=dc2*ar2-ds2*ai2;
ai2=dc2*ai2+ds2*ar2;
ar2=ar2h;
t6=t1;
t7=t2;
t8=t4;
t9=t5;
for(ik=0;ik<idl1;ik++)
{
ch2[t6]+=ar2*c2[t8++];
t6++;
ch2[t7]+=ai2*c2[t9++];
t7++;
}
}
}
t1=0;
for(j=1;j<ipph;j++)
{
t1+=idl1;
t2=t1;
for(ik=0;ik<idl1;ik++)ch2[ik]+=c2[t2++];
}
if(ido<l1) goto L132;
t1=0;
t2=0;
for(k=0;k<l1;k++)
{
t3=t1;
t4=t2;
for(i=0;i<ido;i++)cc[t4++]=ch[t3++];
t1+=ido;
t2+=t10;
}
goto L135;
L132: for(i=0;i<ido;i++)
{
t1=i;
t2=i;
for(k=0;k<l1;k++)
{
cc[t2]=ch[t1];
t1+=ido;
t2+=t10;
}
}
L135: t1=0;
t2=ido<<1;
t3=0;
t4=ipp2*t0;
for(j=1;j<ipph;j++)
{
t1+=t2;
t3+=t0;
t4-=t0;
t5=t1;
t6=t3;
t7=t4;
for(k=0;k<l1;k++)
{
cc[t5-1]=ch[t6];
cc[t5]=ch[t7];
t5+=t10;
t6+=ido;
t7+=ido;
}
}
if(ido==1)return;
if(nbd<l1) goto L141;
t1=-ido;
t3=0;
t4=0;
t5=ipp2*t0;
for(j=1;j<ipph;j++)
{
t1+=t2;
t3+=t2;
t4+=t0;
t5-=t0;
t6=t1;
t7=t3;
t8=t4;
t9=t5;
for(k=0;k<l1;k++)
{
for(i=2;i<ido;i+=2)
{
ic=idp2-i;
cc[i+t7-1]=ch[i+t8-1]+ch[i+t9-1];
cc[ic+t6-1]=ch[i+t8-1]-ch[i+t9-1];
cc[i+t7]=ch[i+t8]+ch[i+t9];
cc[ic+t6]=ch[i+t9]-ch[i+t8];
}
t6+=t10;
t7+=t10;
t8+=ido;
t9+=ido;
}
}
return;
L141: t1=-ido;
t3=0;
t4=0;
t5=ipp2*t0;
for(j=1;j<ipph;j++)
{
t1+=t2;
t3+=t2;
t4+=t0;
t5-=t0;
for(i=2;i<ido;i+=2)
{
t6=idp2+t1-i;
t7=i+t3;
t8=i+t4;
t9=i+t5;
for(k=0;k<l1;k++)
{
cc[t7-1]=ch[t8-1]+ch[t9-1];
cc[t6-1]=ch[t8-1]-ch[t9-1];
cc[t7]=ch[t8]+ch[t9];
cc[t6]=ch[t9]-ch[t8];
t6+=t10;
t7+=t10;
t8+=ido;
t9+=ido;
}
}
}
}
