wrfv2_fire/external/fftpack/fftpack5/cmf5kb.F

   1 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
   2 !
   3 !   FFTPACK 5.0
   4 !   Copyright (C) 1995-2004, Scientific Computing Division,
   5 !   University Corporation for Atmospheric Research
   6 !   Licensed under the GNU General Public License (GPL)
   7 !
   8 !   Authors:  Paul N. Swarztrauber and Richard A. Valent
   9 !
  10 !   $Id: cmf5kb.f,v 1.2 2004/06/15 21:08:32 rodney Exp $
  11 !
  12 !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
  13
  14       SUBROUTINE CMF5KB (LOT,IDO,L1,NA,CC,IM1,IN1,CH,IM2,IN2,WA)
  15       REAL  CC(2,IN1,L1,IDO,5),CH(2,IN2,L1,5,IDO),WA(IDO,4,2)
  16       DATA TR11,TI11,TR12,TI12 /.3090169943749474,.9510565162951536,    &
  17      &-.8090169943749474,.5877852522924731/
  18 !
  19 ! FFTPACK 5.0 auxiliary routine
  20 !
  21       M1D = (LOT-1)*IM1+1
  22       M2S = 1-IM2
  23       IF (IDO.GT.1 .OR. NA.EQ.1) GO TO 102
  24       DO 101 K=1,L1
  25          DO 101 M1=1,M1D,IM1
  26          TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5)
  27          TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5)
  28          TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4)
  29          TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4)
  30          TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5)
  31          TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5)
  32          TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4)
  33          TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4)
  34          CHOLD1 = CC(1,M1,K,1,1)+TR2+TR3
  35          CHOLD2 = CC(2,M1,K,1,1)+TI2+TI3
  36          CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3
  37          CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3
  38          CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3
  39          CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3
  40          CC(1,M1,K,1,1) = CHOLD1
  41          CC(2,M1,K,1,1) = CHOLD2
  42          CR5 = TI11*TR5+TI12*TR4
  43          CI5 = TI11*TI5+TI12*TI4
  44          CR4 = TI12*TR5-TI11*TR4
  45          CI4 = TI12*TI5-TI11*TI4
  46          CC(1,M1,K,1,2) = CR2-CI5
  47          CC(1,M1,K,1,5) = CR2+CI5
  48          CC(2,M1,K,1,2) = CI2+CR5
  49          CC(2,M1,K,1,3) = CI3+CR4
  50          CC(1,M1,K,1,3) = CR3-CI4
  51          CC(1,M1,K,1,4) = CR3+CI4
  52          CC(2,M1,K,1,4) = CI3-CR4
  53          CC(2,M1,K,1,5) = CI2-CR5
  54   101 CONTINUE
  55       RETURN
  56   102 DO 103 K=1,L1
  57          M2 = M2S
  58          DO 103 M1=1,M1D,IM1
  59          M2 = M2+IM2
  60          TI5 = CC(2,M1,K,1,2)-CC(2,M1,K,1,5)
  61          TI2 = CC(2,M1,K,1,2)+CC(2,M1,K,1,5)
  62          TI4 = CC(2,M1,K,1,3)-CC(2,M1,K,1,4)
  63          TI3 = CC(2,M1,K,1,3)+CC(2,M1,K,1,4)
  64          TR5 = CC(1,M1,K,1,2)-CC(1,M1,K,1,5)
  65          TR2 = CC(1,M1,K,1,2)+CC(1,M1,K,1,5)
  66          TR4 = CC(1,M1,K,1,3)-CC(1,M1,K,1,4)
  67          TR3 = CC(1,M1,K,1,3)+CC(1,M1,K,1,4)
  68          CH(1,M2,K,1,1) = CC(1,M1,K,1,1)+TR2+TR3
  69          CH(2,M2,K,1,1) = CC(2,M1,K,1,1)+TI2+TI3
  70          CR2 = CC(1,M1,K,1,1)+TR11*TR2+TR12*TR3
  71          CI2 = CC(2,M1,K,1,1)+TR11*TI2+TR12*TI3
  72          CR3 = CC(1,M1,K,1,1)+TR12*TR2+TR11*TR3
  73          CI3 = CC(2,M1,K,1,1)+TR12*TI2+TR11*TI3
  74          CR5 = TI11*TR5+TI12*TR4
  75          CI5 = TI11*TI5+TI12*TI4
  76          CR4 = TI12*TR5-TI11*TR4
  77          CI4 = TI12*TI5-TI11*TI4
  78          CH(1,M2,K,2,1) = CR2-CI5
  79          CH(1,M2,K,5,1) = CR2+CI5
  80          CH(2,M2,K,2,1) = CI2+CR5
  81          CH(2,M2,K,3,1) = CI3+CR4
  82          CH(1,M2,K,3,1) = CR3-CI4
  83          CH(1,M2,K,4,1) = CR3+CI4
  84          CH(2,M2,K,4,1) = CI3-CR4
  85          CH(2,M2,K,5,1) = CI2-CR5
  86   103 CONTINUE
  87       IF(IDO .EQ. 1) RETURN
  88       DO 105 I=2,IDO
  89          DO 104 K=1,L1
  90          M2 = M2S
  91          DO 104 M1=1,M1D,IM1
  92          M2 = M2+IM2
  93             TI5 = CC(2,M1,K,I,2)-CC(2,M1,K,I,5)
  94             TI2 = CC(2,M1,K,I,2)+CC(2,M1,K,I,5)
  95             TI4 = CC(2,M1,K,I,3)-CC(2,M1,K,I,4)
  96             TI3 = CC(2,M1,K,I,3)+CC(2,M1,K,I,4)
  97             TR5 = CC(1,M1,K,I,2)-CC(1,M1,K,I,5)
  98             TR2 = CC(1,M1,K,I,2)+CC(1,M1,K,I,5)
  99             TR4 = CC(1,M1,K,I,3)-CC(1,M1,K,I,4)
 100             TR3 = CC(1,M1,K,I,3)+CC(1,M1,K,I,4)
 101             CH(1,M2,K,1,I) = CC(1,M1,K,I,1)+TR2+TR3
 102             CH(2,M2,K,1,I) = CC(2,M1,K,I,1)+TI2+TI3
 103             CR2 = CC(1,M1,K,I,1)+TR11*TR2+TR12*TR3
 104             CI2 = CC(2,M1,K,I,1)+TR11*TI2+TR12*TI3
 105             CR3 = CC(1,M1,K,I,1)+TR12*TR2+TR11*TR3
 106             CI3 = CC(2,M1,K,I,1)+TR12*TI2+TR11*TI3
 107             CR5 = TI11*TR5+TI12*TR4
 108             CI5 = TI11*TI5+TI12*TI4
 109             CR4 = TI12*TR5-TI11*TR4
 110             CI4 = TI12*TI5-TI11*TI4
 111             DR3 = CR3-CI4
 112             DR4 = CR3+CI4
 113             DI3 = CI3+CR4
 114             DI4 = CI3-CR4
 115             DR5 = CR2+CI5
 116             DR2 = CR2-CI5
 117             DI5 = CI2-CR5
 118             DI2 = CI2+CR5
 119             CH(1,M2,K,2,I) = WA(I,1,1)*DR2-WA(I,1,2)*DI2
 120             CH(2,M2,K,2,I) = WA(I,1,1)*DI2+WA(I,1,2)*DR2
 121             CH(1,M2,K,3,I) = WA(I,2,1)*DR3-WA(I,2,2)*DI3
 122             CH(2,M2,K,3,I) = WA(I,2,1)*DI3+WA(I,2,2)*DR3
 123             CH(1,M2,K,4,I) = WA(I,3,1)*DR4-WA(I,3,2)*DI4
 124             CH(2,M2,K,4,I) = WA(I,3,1)*DI4+WA(I,3,2)*DR4
 125             CH(1,M2,K,5,I) = WA(I,4,1)*DR5-WA(I,4,2)*DI5
 126             CH(2,M2,K,5,I) = WA(I,4,1)*DI5+WA(I,4,2)*DR5
 127   104    CONTINUE
 128   105 END DO
 129       RETURN
 130       END