00001 subroutine passb5 (ido,l1,cc,ch,wa1,wa2,wa3,wa4)
00002 dimension cc(ido,5,l1) ,ch(ido,l1,5) ,
00003 1 wa1(1) ,wa2(1) ,wa3(1) ,wa4(1)
00004 data tr11,ti11,tr12,ti12 /.309016994374947,.951056516295154,
00005 1-.809016994374947,.587785252292473/
00006 if (ido .ne. 2) go to 102
00007 do 101 k=1,l1
00008 ti5 = cc(2,2,k)-cc(2,5,k)
00009 ti2 = cc(2,2,k)+cc(2,5,k)
00010 ti4 = cc(2,3,k)-cc(2,4,k)
00011 ti3 = cc(2,3,k)+cc(2,4,k)
00012 tr5 = cc(1,2,k)-cc(1,5,k)
00013 tr2 = cc(1,2,k)+cc(1,5,k)
00014 tr4 = cc(1,3,k)-cc(1,4,k)
00015 tr3 = cc(1,3,k)+cc(1,4,k)
00016 ch(1,k,1) = cc(1,1,k)+tr2+tr3
00017 ch(2,k,1) = cc(2,1,k)+ti2+ti3
00018 cr2 = cc(1,1,k)+tr11*tr2+tr12*tr3
00019 ci2 = cc(2,1,k)+tr11*ti2+tr12*ti3
00020 cr3 = cc(1,1,k)+tr12*tr2+tr11*tr3
00021 ci3 = cc(2,1,k)+tr12*ti2+tr11*ti3
00022 cr5 = ti11*tr5+ti12*tr4
00023 ci5 = ti11*ti5+ti12*ti4
00024 cr4 = ti12*tr5-ti11*tr4
00025 ci4 = ti12*ti5-ti11*ti4
00026 ch(1,k,2) = cr2-ci5
00027 ch(1,k,5) = cr2+ci5
00028 ch(2,k,2) = ci2+cr5
00029 ch(2,k,3) = ci3+cr4
00030 ch(1,k,3) = cr3-ci4
00031 ch(1,k,4) = cr3+ci4
00032 ch(2,k,4) = ci3-cr4
00033 ch(2,k,5) = ci2-cr5
00034 101 continue
00035 return
00036 102 do 104 k=1,l1
00037 do 103 i=2,ido,2
00038 ti5 = cc(i,2,k)-cc(i,5,k)
00039 ti2 = cc(i,2,k)+cc(i,5,k)
00040 ti4 = cc(i,3,k)-cc(i,4,k)
00041 ti3 = cc(i,3,k)+cc(i,4,k)
00042 tr5 = cc(i-1,2,k)-cc(i-1,5,k)
00043 tr2 = cc(i-1,2,k)+cc(i-1,5,k)
00044 tr4 = cc(i-1,3,k)-cc(i-1,4,k)
00045 tr3 = cc(i-1,3,k)+cc(i-1,4,k)
00046 ch(i-1,k,1) = cc(i-1,1,k)+tr2+tr3
00047 ch(i,k,1) = cc(i,1,k)+ti2+ti3
00048 cr2 = cc(i-1,1,k)+tr11*tr2+tr12*tr3
00049 ci2 = cc(i,1,k)+tr11*ti2+tr12*ti3
00050 cr3 = cc(i-1,1,k)+tr12*tr2+tr11*tr3
00051 ci3 = cc(i,1,k)+tr12*ti2+tr11*ti3
00052 cr5 = ti11*tr5+ti12*tr4
00053 ci5 = ti11*ti5+ti12*ti4
00054 cr4 = ti12*tr5-ti11*tr4
00055 ci4 = ti12*ti5-ti11*ti4
00056 dr3 = cr3-ci4
00057 dr4 = cr3+ci4
00058 di3 = ci3+cr4
00059 di4 = ci3-cr4
00060 dr5 = cr2+ci5
00061 dr2 = cr2-ci5
00062 di5 = ci2-cr5
00063 di2 = ci2+cr5
00064 ch(i-1,k,2) = wa1(i-1)*dr2-wa1(i)*di2
00065 ch(i,k,2) = wa1(i-1)*di2+wa1(i)*dr2
00066 ch(i-1,k,3) = wa2(i-1)*dr3-wa2(i)*di3
00067 ch(i,k,3) = wa2(i-1)*di3+wa2(i)*dr3
00068 ch(i-1,k,4) = wa3(i-1)*dr4-wa3(i)*di4
00069 ch(i,k,4) = wa3(i-1)*di4+wa3(i)*dr4
00070 ch(i-1,k,5) = wa4(i-1)*dr5-wa4(i)*di5
00071 ch(i,k,5) = wa4(i-1)*di5+wa4(i)*dr5
00072 103 continue
00073 104 continue
00074 return
00075 end
1.7.1
