share/fftpack5/fortran/c1f5kf.f

   1 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
   2 C
   3 C   FFTPACK 5.0
   4 C
   5 C   Authors:  Paul N. Swarztrauber and Richard A. Valent
   6 C
   7 C   $Id$
   8 C
   9 CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  10
  11       SUBROUTINE C1F5KF (IDO,L1,NA,CC,IN1,CH,IN2,WA)
  12       REAL  CC(IN1,L1,IDO,5),CH(IN2,L1,5,IDO),WA(IDO,4,2)
  13       DATA TR11,TI11,TR12,TI12 /.3090169943749474,-.9510565162951536,
  14      1-.8090169943749474,-.5877852522924731/
  15 C
  16 C FFTPACK 5.0 auxiliary routine
  17 C
  18       IF (IDO .GT. 1) GO TO 102
  19       SN = 1./REAL(5*L1)
  20       IF (NA .EQ. 1) GO TO 106
  21       DO 101 K=1,L1
  22 C rav    DO 101 M1=1,M1D,IM1
  23          TI5 = CC(2,K,1,2)-CC(2,K,1,5)
  24          TI2 = CC(2,K,1,2)+CC(2,K,1,5)
  25          TI4 = CC(2,K,1,3)-CC(2,K,1,4)
  26          TI3 = CC(2,K,1,3)+CC(2,K,1,4)
  27          TR5 = CC(1,K,1,2)-CC(1,K,1,5)
  28          TR2 = CC(1,K,1,2)+CC(1,K,1,5)
  29          TR4 = CC(1,K,1,3)-CC(1,K,1,4)
  30          TR3 = CC(1,K,1,3)+CC(1,K,1,4)
  31          CHOLD1 = SN*(CC(1,K,1,1)+TR2+TR3)
  32          CHOLD2 = SN*(CC(2,K,1,1)+TI2+TI3)
  33          CR2 = CC(1,K,1,1)+TR11*TR2+TR12*TR3
  34          CI2 = CC(2,K,1,1)+TR11*TI2+TR12*TI3
  35          CR3 = CC(1,K,1,1)+TR12*TR2+TR11*TR3
  36          CI3 = CC(2,K,1,1)+TR12*TI2+TR11*TI3
  37          CC(1,K,1,1) = CHOLD1
  38          CC(2,K,1,1) = CHOLD2
  39          CR5 = TI11*TR5+TI12*TR4
  40          CI5 = TI11*TI5+TI12*TI4
  41          CR4 = TI12*TR5-TI11*TR4
  42          CI4 = TI12*TI5-TI11*TI4
  43          CC(1,K,1,2) = SN*(CR2-CI5)
  44          CC(1,K,1,5) = SN*(CR2+CI5)
  45          CC(2,K,1,2) = SN*(CI2+CR5)
  46          CC(2,K,1,3) = SN*(CI3+CR4)
  47          CC(1,K,1,3) = SN*(CR3-CI4)
  48          CC(1,K,1,4) = SN*(CR3+CI4)
  49          CC(2,K,1,4) = SN*(CI3-CR4)
  50          CC(2,K,1,5) = SN*(CI2-CR5)
  51   101 CONTINUE
  52       RETURN
  53   106 DO 107 K=1,L1
  54          TI5 = CC(2,K,1,2)-CC(2,K,1,5)
  55          TI2 = CC(2,K,1,2)+CC(2,K,1,5)
  56          TI4 = CC(2,K,1,3)-CC(2,K,1,4)
  57          TI3 = CC(2,K,1,3)+CC(2,K,1,4)
  58          TR5 = CC(1,K,1,2)-CC(1,K,1,5)
  59          TR2 = CC(1,K,1,2)+CC(1,K,1,5)
  60          TR4 = CC(1,K,1,3)-CC(1,K,1,4)
  61          TR3 = CC(1,K,1,3)+CC(1,K,1,4)
  62          CH(1,K,1,1) = SN*(CC(1,K,1,1)+TR2+TR3)
  63          CH(2,K,1,1) = SN*(CC(2,K,1,1)+TI2+TI3)
  64          CR2 = CC(1,K,1,1)+TR11*TR2+TR12*TR3
  65          CI2 = CC(2,K,1,1)+TR11*TI2+TR12*TI3
  66          CR3 = CC(1,K,1,1)+TR12*TR2+TR11*TR3
  67          CI3 = CC(2,K,1,1)+TR12*TI2+TR11*TI3
  68          CR5 = TI11*TR5+TI12*TR4
  69          CI5 = TI11*TI5+TI12*TI4
  70          CR4 = TI12*TR5-TI11*TR4
  71          CI4 = TI12*TI5-TI11*TI4
  72          CH(1,K,2,1) = SN*(CR2-CI5)
  73          CH(1,K,5,1) = SN*(CR2+CI5)
  74          CH(2,K,2,1) = SN*(CI2+CR5)
  75          CH(2,K,3,1) = SN*(CI3+CR4)
  76          CH(1,K,3,1) = SN*(CR3-CI4)
  77          CH(1,K,4,1) = SN*(CR3+CI4)
  78          CH(2,K,4,1) = SN*(CI3-CR4)
  79          CH(2,K,5,1) = SN*(CI2-CR5)
  80   107 CONTINUE
  81       RETURN
  82   102 DO 103 K=1,L1
  83          TI5 = CC(2,K,1,2)-CC(2,K,1,5)
  84          TI2 = CC(2,K,1,2)+CC(2,K,1,5)
  85          TI4 = CC(2,K,1,3)-CC(2,K,1,4)
  86          TI3 = CC(2,K,1,3)+CC(2,K,1,4)
  87          TR5 = CC(1,K,1,2)-CC(1,K,1,5)
  88          TR2 = CC(1,K,1,2)+CC(1,K,1,5)
  89          TR4 = CC(1,K,1,3)-CC(1,K,1,4)
  90          TR3 = CC(1,K,1,3)+CC(1,K,1,4)
  91          CH(1,K,1,1) = CC(1,K,1,1)+TR2+TR3
  92          CH(2,K,1,1) = CC(2,K,1,1)+TI2+TI3
  93          CR2 = CC(1,K,1,1)+TR11*TR2+TR12*TR3
  94          CI2 = CC(2,K,1,1)+TR11*TI2+TR12*TI3
  95          CR3 = CC(1,K,1,1)+TR12*TR2+TR11*TR3
  96          CI3 = CC(2,K,1,1)+TR12*TI2+TR11*TI3
  97          CR5 = TI11*TR5+TI12*TR4
  98          CI5 = TI11*TI5+TI12*TI4
  99          CR4 = TI12*TR5-TI11*TR4
 100          CI4 = TI12*TI5-TI11*TI4
 101          CH(1,K,2,1) = CR2-CI5
 102          CH(1,K,5,1) = CR2+CI5
 103          CH(2,K,2,1) = CI2+CR5
 104          CH(2,K,3,1) = CI3+CR4
 105          CH(1,K,3,1) = CR3-CI4
 106          CH(1,K,4,1) = CR3+CI4
 107          CH(2,K,4,1) = CI3-CR4
 108          CH(2,K,5,1) = CI2-CR5
 109   103 CONTINUE
 110       DO 105 I=2,IDO
 111          DO 104 K=1,L1
 112             TI5 = CC(2,K,I,2)-CC(2,K,I,5)
 113             TI2 = CC(2,K,I,2)+CC(2,K,I,5)
 114             TI4 = CC(2,K,I,3)-CC(2,K,I,4)
 115             TI3 = CC(2,K,I,3)+CC(2,K,I,4)
 116             TR5 = CC(1,K,I,2)-CC(1,K,I,5)
 117             TR2 = CC(1,K,I,2)+CC(1,K,I,5)
 118             TR4 = CC(1,K,I,3)-CC(1,K,I,4)
 119             TR3 = CC(1,K,I,3)+CC(1,K,I,4)
 120             CH(1,K,1,I) = CC(1,K,I,1)+TR2+TR3
 121             CH(2,K,1,I) = CC(2,K,I,1)+TI2+TI3
 122             CR2 = CC(1,K,I,1)+TR11*TR2+TR12*TR3
 123             CI2 = CC(2,K,I,1)+TR11*TI2+TR12*TI3
 124             CR3 = CC(1,K,I,1)+TR12*TR2+TR11*TR3
 125             CI3 = CC(2,K,I,1)+TR12*TI2+TR11*TI3
 126             CR5 = TI11*TR5+TI12*TR4
 127             CI5 = TI11*TI5+TI12*TI4
 128             CR4 = TI12*TR5-TI11*TR4
 129             CI4 = TI12*TI5-TI11*TI4
 130             DR3 = CR3-CI4
 131             DR4 = CR3+CI4
 132             DI3 = CI3+CR4
 133             DI4 = CI3-CR4
 134             DR5 = CR2+CI5
 135             DR2 = CR2-CI5
 136             DI5 = CI2-CR5
 137             DI2 = CI2+CR5
 138             CH(1,K,2,I) = WA(I,1,1)*DR2+WA(I,1,2)*DI2
 139             CH(2,K,2,I) = WA(I,1,1)*DI2-WA(I,1,2)*DR2
 140             CH(1,K,3,I) = WA(I,2,1)*DR3+WA(I,2,2)*DI3
 141             CH(2,K,3,I) = WA(I,2,1)*DI3-WA(I,2,2)*DR3
 142             CH(1,K,4,I) = WA(I,3,1)*DR4+WA(I,3,2)*DI4
 143             CH(2,K,4,I) = WA(I,3,1)*DI4-WA(I,3,2)*DR4
 144             CH(1,K,5,I) = WA(I,4,1)*DR5+WA(I,4,2)*DI5
 145             CH(2,K,5,I) = WA(I,4,1)*DI5-WA(I,4,2)*DR5
 146   104    CONTINUE
 147   105 CONTINUE
 148       RETURN
 149       END