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Text File  |  1989-08-14  |  2.8 KB  |  82 lines
  1. *deck passf5
  2.       subroutine passf5 (ido,l1,cc,ch,wa1,wa2,wa3,wa4)
  3. C***BEGIN PROLOGUE  PASSF5
  4. C***REFER TO CFFTF
  5. C***ROUTINES CALLED  (NONE)
  6. C***END PROLOGUE  PASSF5
  7.       dimension       cc(ido,5,l1)           ,ch(ido,l1,5)           ,
  8.      1                wa1(1)     ,wa2(1)     ,wa3(1)     ,wa4(1)
  9.       data tr11,ti11,tr12,ti12 /.309016994374947,-.951056516295154,
  10.      1-.809016994374947,-.587785252292473/
  11. C***FIRST EXECUTABLE STATEMENT  PASSF5
  12.       if (ido .ne. 2) go to 102
  13.       do 101 k=1,l1
  14.          ti5 = cc(2,2,k)-cc(2,5,k)
  15.          ti2 = cc(2,2,k)+cc(2,5,k)
  16.          ti4 = cc(2,3,k)-cc(2,4,k)
  17.          ti3 = cc(2,3,k)+cc(2,4,k)
  18.          tr5 = cc(1,2,k)-cc(1,5,k)
  19.          tr2 = cc(1,2,k)+cc(1,5,k)
  20.          tr4 = cc(1,3,k)-cc(1,4,k)
  21.          tr3 = cc(1,3,k)+cc(1,4,k)
  22.          ch(1,k,1) = cc(1,1,k)+tr2+tr3
  23.          ch(2,k,1) = cc(2,1,k)+ti2+ti3
  24.          cr2 = cc(1,1,k)+tr11*tr2+tr12*tr3
  25.          ci2 = cc(2,1,k)+tr11*ti2+tr12*ti3
  26.          cr3 = cc(1,1,k)+tr12*tr2+tr11*tr3
  27.          ci3 = cc(2,1,k)+tr12*ti2+tr11*ti3
  28.          cr5 = ti11*tr5+ti12*tr4
  29.          ci5 = ti11*ti5+ti12*ti4
  30.          cr4 = ti12*tr5-ti11*tr4
  31.          ci4 = ti12*ti5-ti11*ti4
  32.          ch(1,k,2) = cr2-ci5
  33.          ch(1,k,5) = cr2+ci5
  34.          ch(2,k,2) = ci2+cr5
  35.          ch(2,k,3) = ci3+cr4
  36.          ch(1,k,3) = cr3-ci4
  37.          ch(1,k,4) = cr3+ci4
  38.          ch(2,k,4) = ci3-cr4
  39.          ch(2,k,5) = ci2-cr5
  40.   101 continue
  41.       return
  42.   102 do 104 k=1,l1
  43.          do 103 i=2,ido,2
  44.             ti5 = cc(i,2,k)-cc(i,5,k)
  45.             ti2 = cc(i,2,k)+cc(i,5,k)
  46.             ti4 = cc(i,3,k)-cc(i,4,k)
  47.             ti3 = cc(i,3,k)+cc(i,4,k)
  48.             tr5 = cc(i-1,2,k)-cc(i-1,5,k)
  49.             tr2 = cc(i-1,2,k)+cc(i-1,5,k)
  50.             tr4 = cc(i-1,3,k)-cc(i-1,4,k)
  51.             tr3 = cc(i-1,3,k)+cc(i-1,4,k)
  52.             ch(i-1,k,1) = cc(i-1,1,k)+tr2+tr3
  53.             ch(i,k,1) = cc(i,1,k)+ti2+ti3
  54.             cr2 = cc(i-1,1,k)+tr11*tr2+tr12*tr3
  55.             ci2 = cc(i,1,k)+tr11*ti2+tr12*ti3
  56.             cr3 = cc(i-1,1,k)+tr12*tr2+tr11*tr3
  57.             ci3 = cc(i,1,k)+tr12*ti2+tr11*ti3
  58.             cr5 = ti11*tr5+ti12*tr4
  59.             ci5 = ti11*ti5+ti12*ti4
  60.             cr4 = ti12*tr5-ti11*tr4
  61.             ci4 = ti12*ti5-ti11*ti4
  62.             dr3 = cr3-ci4
  63.             dr4 = cr3+ci4
  64.             di3 = ci3+cr4
  65.             di4 = ci3-cr4
  66.             dr5 = cr2+ci5
  67.             dr2 = cr2-ci5
  68.             di5 = ci2-cr5
  69.             di2 = ci2+cr5
  70.             ch(i-1,k,2) = wa1(i-1)*dr2+wa1(i)*di2
  71.             ch(i,k,2) = wa1(i-1)*di2-wa1(i)*dr2
  72.             ch(i-1,k,3) = wa2(i-1)*dr3+wa2(i)*di3
  73.             ch(i,k,3) = wa2(i-1)*di3-wa2(i)*dr3
  74.             ch(i-1,k,4) = wa3(i-1)*dr4+wa3(i)*di4
  75.             ch(i,k,4) = wa3(i-1)*di4-wa3(i)*dr4
  76.             ch(i-1,k,5) = wa4(i-1)*dr5+wa4(i)*di5
  77.             ch(i,k,5) = wa4(i-1)*di5-wa4(i)*dr5
  78.   103    continue
  79.   104 continue
  80.       return
  81.       end
  82.