GNU Octave  3.8.0 A high-level interpreted language, primarily intended for numerical computations, mostly compatible with Matlab
zpassb5.f
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1  subroutine zpassb5 (ido,l1,cc,ch,wa1,wa2,wa3,wa4)
2  implicit double precision (a-h,o-z)
3  dimension cc(ido,5,l1) ,ch(ido,l1,5) ,
4  1 wa1(1) ,wa2(1) ,wa3(1) ,wa4(1)
5  data tr11,ti11,tr12,ti12 /.309016994374947d0,.951056516295154d0,
6  1-.809016994374947d0,.587785252292473d0/
7  if (ido .ne. 2) go to 102
8  do 101 k=1,l1
9  ti5 = cc(2,2,k)-cc(2,5,k)
10  ti2 = cc(2,2,k)+cc(2,5,k)
11  ti4 = cc(2,3,k)-cc(2,4,k)
12  ti3 = cc(2,3,k)+cc(2,4,k)
13  tr5 = cc(1,2,k)-cc(1,5,k)
14  tr2 = cc(1,2,k)+cc(1,5,k)
15  tr4 = cc(1,3,k)-cc(1,4,k)
16  tr3 = cc(1,3,k)+cc(1,4,k)
17  ch(1,k,1) = cc(1,1,k)+tr2+tr3
18  ch(2,k,1) = cc(2,1,k)+ti2+ti3
19  cr2 = cc(1,1,k)+tr11*tr2+tr12*tr3
20  ci2 = cc(2,1,k)+tr11*ti2+tr12*ti3
21  cr3 = cc(1,1,k)+tr12*tr2+tr11*tr3
22  ci3 = cc(2,1,k)+tr12*ti2+tr11*ti3
23  cr5 = ti11*tr5+ti12*tr4
24  ci5 = ti11*ti5+ti12*ti4
25  cr4 = ti12*tr5-ti11*tr4
26  ci4 = ti12*ti5-ti11*ti4
27  ch(1,k,2) = cr2-ci5
28  ch(1,k,5) = cr2+ci5
29  ch(2,k,2) = ci2+cr5
30  ch(2,k,3) = ci3+cr4
31  ch(1,k,3) = cr3-ci4
32  ch(1,k,4) = cr3+ci4
33  ch(2,k,4) = ci3-cr4
34  ch(2,k,5) = ci2-cr5
35  101 continue
36  return
37  102 do 104 k=1,l1
38  do 103 i=2,ido,2
39  ti5 = cc(i,2,k)-cc(i,5,k)
40  ti2 = cc(i,2,k)+cc(i,5,k)
41  ti4 = cc(i,3,k)-cc(i,4,k)
42  ti3 = cc(i,3,k)+cc(i,4,k)
43  tr5 = cc(i-1,2,k)-cc(i-1,5,k)
44  tr2 = cc(i-1,2,k)+cc(i-1,5,k)
45  tr4 = cc(i-1,3,k)-cc(i-1,4,k)
46  tr3 = cc(i-1,3,k)+cc(i-1,4,k)
47  ch(i-1,k,1) = cc(i-1,1,k)+tr2+tr3
48  ch(i,k,1) = cc(i,1,k)+ti2+ti3
49  cr2 = cc(i-1,1,k)+tr11*tr2+tr12*tr3
50  ci2 = cc(i,1,k)+tr11*ti2+tr12*ti3
51  cr3 = cc(i-1,1,k)+tr12*tr2+tr11*tr3
52  ci3 = cc(i,1,k)+tr12*ti2+tr11*ti3
53  cr5 = ti11*tr5+ti12*tr4
54  ci5 = ti11*ti5+ti12*ti4
55  cr4 = ti12*tr5-ti11*tr4
56  ci4 = ti12*ti5-ti11*ti4
57  dr3 = cr3-ci4
58  dr4 = cr3+ci4
59  di3 = ci3+cr4
60  di4 = ci3-cr4
61  dr5 = cr2+ci5
62  dr2 = cr2-ci5
63  di5 = ci2-cr5
64  di2 = ci2+cr5
65  ch(i-1,k,2) = wa1(i-1)*dr2-wa1(i)*di2
66  ch(i,k,2) = wa1(i-1)*di2+wa1(i)*dr2
67  ch(i-1,k,3) = wa2(i-1)*dr3-wa2(i)*di3
68  ch(i,k,3) = wa2(i-1)*di3+wa2(i)*dr3
69  ch(i-1,k,4) = wa3(i-1)*dr4-wa3(i)*di4
70  ch(i,k,4) = wa3(i-1)*di4+wa3(i)*dr4
71  ch(i-1,k,5) = wa4(i-1)*dr5-wa4(i)*di5
72  ch(i,k,5) = wa4(i-1)*di5+wa4(i)*dr5
73  103 continue
74  104 continue
75  return
76  end