share/fftpack5/fortran/c1f5kb.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 C1F5KB (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 .OR. NA.EQ.1) GO TO 102
  19       DO 101 K=1,L1
  20          TI5 = CC(2,K,1,2)-CC(2,K,1,5)
  21          TI2 = CC(2,K,1,2)+CC(2,K,1,5)
  22          TI4 = CC(2,K,1,3)-CC(2,K,1,4)
  23          TI3 = CC(2,K,1,3)+CC(2,K,1,4)
  24          TR5 = CC(1,K,1,2)-CC(1,K,1,5)
  25          TR2 = CC(1,K,1,2)+CC(1,K,1,5)
  26          TR4 = CC(1,K,1,3)-CC(1,K,1,4)
  27          TR3 = CC(1,K,1,3)+CC(1,K,1,4)
  28          CHOLD1 = CC(1,K,1,1)+TR2+TR3
  29          CHOLD2 = CC(2,K,1,1)+TI2+TI3
  30          CR2 = CC(1,K,1,1)+TR11*TR2+TR12*TR3
  31          CI2 = CC(2,K,1,1)+TR11*TI2+TR12*TI3
  32          CR3 = CC(1,K,1,1)+TR12*TR2+TR11*TR3
  33          CI3 = CC(2,K,1,1)+TR12*TI2+TR11*TI3
  34          CC(1,K,1,1) = CHOLD1
  35          CC(2,K,1,1) = CHOLD2
  36          CR5 = TI11*TR5+TI12*TR4
  37          CI5 = TI11*TI5+TI12*TI4
  38          CR4 = TI12*TR5-TI11*TR4
  39          CI4 = TI12*TI5-TI11*TI4
  40          CC(1,K,1,2) = CR2-CI5
  41          CC(1,K,1,5) = CR2+CI5
  42          CC(2,K,1,2) = CI2+CR5
  43          CC(2,K,1,3) = CI3+CR4
  44          CC(1,K,1,3) = CR3-CI4
  45          CC(1,K,1,4) = CR3+CI4
  46          CC(2,K,1,4) = CI3-CR4
  47          CC(2,K,1,5) = CI2-CR5
  48   101 CONTINUE
  49       RETURN
  50   102 DO 103 K=1,L1
  51          TI5 = CC(2,K,1,2)-CC(2,K,1,5)
  52          TI2 = CC(2,K,1,2)+CC(2,K,1,5)
  53          TI4 = CC(2,K,1,3)-CC(2,K,1,4)
  54          TI3 = CC(2,K,1,3)+CC(2,K,1,4)
  55          TR5 = CC(1,K,1,2)-CC(1,K,1,5)
  56          TR2 = CC(1,K,1,2)+CC(1,K,1,5)
  57          TR4 = CC(1,K,1,3)-CC(1,K,1,4)
  58          TR3 = CC(1,K,1,3)+CC(1,K,1,4)
  59          CH(1,K,1,1) = CC(1,K,1,1)+TR2+TR3
  60          CH(2,K,1,1) = CC(2,K,1,1)+TI2+TI3
  61          CR2 = CC(1,K,1,1)+TR11*TR2+TR12*TR3
  62          CI2 = CC(2,K,1,1)+TR11*TI2+TR12*TI3
  63          CR3 = CC(1,K,1,1)+TR12*TR2+TR11*TR3
  64          CI3 = CC(2,K,1,1)+TR12*TI2+TR11*TI3
  65          CR5 = TI11*TR5+TI12*TR4
  66          CI5 = TI11*TI5+TI12*TI4
  67          CR4 = TI12*TR5-TI11*TR4
  68          CI4 = TI12*TI5-TI11*TI4
  69          CH(1,K,2,1) = CR2-CI5
  70          CH(1,K,5,1) = CR2+CI5
  71          CH(2,K,2,1) = CI2+CR5
  72          CH(2,K,3,1) = CI3+CR4
  73          CH(1,K,3,1) = CR3-CI4
  74          CH(1,K,4,1) = CR3+CI4
  75          CH(2,K,4,1) = CI3-CR4
  76          CH(2,K,5,1) = CI2-CR5
  77   103 CONTINUE
  78       IF(IDO .EQ. 1) RETURN
  79       DO 105 I=2,IDO
  80          DO 104 K=1,L1
  81             TI5 = CC(2,K,I,2)-CC(2,K,I,5)
  82             TI2 = CC(2,K,I,2)+CC(2,K,I,5)
  83             TI4 = CC(2,K,I,3)-CC(2,K,I,4)
  84             TI3 = CC(2,K,I,3)+CC(2,K,I,4)
  85             TR5 = CC(1,K,I,2)-CC(1,K,I,5)
  86             TR2 = CC(1,K,I,2)+CC(1,K,I,5)
  87             TR4 = CC(1,K,I,3)-CC(1,K,I,4)
  88             TR3 = CC(1,K,I,3)+CC(1,K,I,4)
  89             CH(1,K,1,I) = CC(1,K,I,1)+TR2+TR3
  90             CH(2,K,1,I) = CC(2,K,I,1)+TI2+TI3
  91             CR2 = CC(1,K,I,1)+TR11*TR2+TR12*TR3
  92             CI2 = CC(2,K,I,1)+TR11*TI2+TR12*TI3
  93             CR3 = CC(1,K,I,1)+TR12*TR2+TR11*TR3
  94             CI3 = CC(2,K,I,1)+TR12*TI2+TR11*TI3
  95             CR5 = TI11*TR5+TI12*TR4
  96             CI5 = TI11*TI5+TI12*TI4
  97             CR4 = TI12*TR5-TI11*TR4
  98             CI4 = TI12*TI5-TI11*TI4
  99             DR3 = CR3-CI4
 100             DR4 = CR3+CI4
 101             DI3 = CI3+CR4
 102             DI4 = CI3-CR4
 103             DR5 = CR2+CI5
 104             DR2 = CR2-CI5
 105             DI5 = CI2-CR5
 106             DI2 = CI2+CR5
 107             CH(1,K,2,I) = WA(I,1,1)*DR2-WA(I,1,2)*DI2
 108             CH(2,K,2,I) = WA(I,1,1)*DI2+WA(I,1,2)*DR2
 109             CH(1,K,3,I) = WA(I,2,1)*DR3-WA(I,2,2)*DI3
 110             CH(2,K,3,I) = WA(I,2,1)*DI3+WA(I,2,2)*DR3
 111             CH(1,K,4,I) = WA(I,3,1)*DR4-WA(I,3,2)*DI4
 112             CH(2,K,4,I) = WA(I,3,1)*DI4+WA(I,3,2)*DR4
 113             CH(1,K,5,I) = WA(I,4,1)*DR5-WA(I,4,2)*DI5
 114             CH(2,K,5,I) = WA(I,4,1)*DI5+WA(I,4,2)*DR5
 115   104    CONTINUE
 116   105 CONTINUE
 117       RETURN
 118       END