wrfv2_fire/external/fftpack/fftpack5/cmf5kb.F

   1 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
   2 !
   3 !   FFTPACK 5.0
   4 !
   5 !   Authors:  Paul N. Swarztrauber and Richard A. Valent
   6 !
   7 !   $Id: cmf5kb.f,v 1.2 2004/06/15 21:08:32 rodney Exp $
   8 !
   9 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  10
  11       SUBROUTINE CMF5KB (LOT,IDO,L1,NA,CC,IM1,IN1,CH,IM2,IN2,WA)
  12       REAL  CC(2,IN1,L1,IDO,5),CH(2,IN2,L1,5,IDO),WA(IDO,4,2)
  13       DATA TR11,TI11,TR12,TI12 /.3090169943749474,.9510565162951536,    &
  14      &-.8090169943749474,.5877852522924731/
  15 !
  16 ! FFTPACK 5.0 auxiliary routine
  17 !
  18       M1D = (LOT-1)*IM1+1
  19       M2S = 1-IM2
  20       IF (IDO.GT.1 .OR. NA.EQ.1) GO TO 102
  21       DO 101 K=1,L1
  22          DO 101 M1=1,M1D,IM1
  23          TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5)
  24          TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5)
  25          TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4)
  26          TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4)
  27          TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5)
  28          TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5)
  29          TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4)
  30          TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4)
  31          CHOLD1 = CC(1,M1,K,1,1)+TR2+TR3
  32          CHOLD2 = CC(2,M1,K,1,1)+TI2+TI3
  33          CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3
  34          CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3
  35          CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3
  36          CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3
  37          CC(1,M1,K,1,1) = CHOLD1
  38          CC(2,M1,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,M1,K,1,2) = CR2-CI5
  44          CC(1,M1,K,1,5) = CR2+CI5
  45          CC(2,M1,K,1,2) = CI2+CR5
  46          CC(2,M1,K,1,3) = CI3+CR4
  47          CC(1,M1,K,1,3) = CR3-CI4
  48          CC(1,M1,K,1,4) = CR3+CI4
  49          CC(2,M1,K,1,4) = CI3-CR4
  50          CC(2,M1,K,1,5) = CI2-CR5
  51   101 CONTINUE
  52       RETURN
  53   102 DO 103 K=1,L1
  54          M2 = M2S
  55          DO 103 M1=1,M1D,IM1
  56          M2 = M2+IM2
  57          TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5)
  58          TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5)
  59          TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4)
  60          TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4)
  61          TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5)
  62          TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5)
  63          TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4)
  64          TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4)
  65          CH(1,M2,K,1,1) = CC(1,M1,K,1,1)+TR2+TR3
  66          CH(2,M2,K,1,1) = CC(2,M1,K,1,1)+TI2+TI3
  67          CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3
  68          CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3
  69          CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3
  70          CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3
  71          CR5 = TI11*TR5+TI12*TR4
  72          CI5 = TI11*TI5+TI12*TI4
  73          CR4 = TI12*TR5-TI11*TR4
  74          CI4 = TI12*TI5-TI11*TI4
  75          CH(1,M2,K,2,1) = CR2-CI5
  76          CH(1,M2,K,5,1) = CR2+CI5
  77          CH(2,M2,K,2,1) = CI2+CR5
  78          CH(2,M2,K,3,1) = CI3+CR4
  79          CH(1,M2,K,3,1) = CR3-CI4
  80          CH(1,M2,K,4,1) = CR3+CI4
  81          CH(2,M2,K,4,1) = CI3-CR4
  82          CH(2,M2,K,5,1) = CI2-CR5
  83   103 CONTINUE
  84       IF(IDO .EQ. 1) RETURN
  85       DO 105 I=2,IDO
  86          DO 104 K=1,L1
  87          M2 = M2S
  88          DO 104 M1=1,M1D,IM1
  89          M2 = M2+IM2
  90             TI5 = CC(2,M1,K,I,2)-CC(2,M1,K,I,5)
  91             TI2 = CC(2,M1,K,I,2)+CC(2,M1,K,I,5)
  92             TI4 = CC(2,M1,K,I,3)-CC(2,M1,K,I,4)
  93             TI3 = CC(2,M1,K,I,3)+CC(2,M1,K,I,4)
  94             TR5 = CC(1,M1,K,I,2)-CC(1,M1,K,I,5)
  95             TR2 = CC(1,M1,K,I,2)+CC(1,M1,K,I,5)
  96             TR4 = CC(1,M1,K,I,3)-CC(1,M1,K,I,4)
  97             TR3 = CC(1,M1,K,I,3)+CC(1,M1,K,I,4)
  98             CH(1,M2,K,1,I) = CC(1,M1,K,I,1)+TR2+TR3
  99             CH(2,M2,K,1,I) = CC(2,M1,K,I,1)+TI2+TI3
 100             CR2 = CC(1,M1,K,I,1)+TR11*TR2+TR12*TR3
 101             CI2 = CC(2,M1,K,I,1)+TR11*TI2+TR12*TI3
 102             CR3 = CC(1,M1,K,I,1)+TR12*TR2+TR11*TR3
 103             CI3 = CC(2,M1,K,I,1)+TR12*TI2+TR11*TI3
 104             CR5 = TI11*TR5+TI12*TR4
 105             CI5 = TI11*TI5+TI12*TI4
 106             CR4 = TI12*TR5-TI11*TR4
 107             CI4 = TI12*TI5-TI11*TI4
 108             DR3 = CR3-CI4
 109             DR4 = CR3+CI4
 110             DI3 = CI3+CR4
 111             DI4 = CI3-CR4
 112             DR5 = CR2+CI5
 113             DR2 = CR2-CI5
 114             DI5 = CI2-CR5
 115             DI2 = CI2+CR5
 116             CH(1,M2,K,2,I) = WA(I,1,1)*DR2-WA(I,1,2)*DI2
 117             CH(2,M2,K,2,I) = WA(I,1,1)*DI2+WA(I,1,2)*DR2
 118             CH(1,M2,K,3,I) = WA(I,2,1)*DR3-WA(I,2,2)*DI3
 119             CH(2,M2,K,3,I) = WA(I,2,1)*DI3+WA(I,2,2)*DR3
 120             CH(1,M2,K,4,I) = WA(I,3,1)*DR4-WA(I,3,2)*DI4
 121             CH(2,M2,K,4,I) = WA(I,3,1)*DI4+WA(I,3,2)*DR4
 122             CH(1,M2,K,5,I) = WA(I,4,1)*DR5-WA(I,4,2)*DI5
 123             CH(2,M2,K,5,I) = WA(I,4,1)*DI5+WA(I,4,2)*DR5
 124   104    CONTINUE
 125   105 END DO
 126       RETURN
 127       END