wrf-fire /wrfv2_fire/external/fftpack/fftpack5/r1f4kf.F

Language Fortran 77 Lines 77
MD5 Hash 013fc332cd41c275762d72dce1f05fee Estimated Cost $1,532 (why?)
Repository git://github.com/jbeezley/wrf-fire.git View Raw File View Project SPDX
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!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
!                                                                       
!   FFTPACK 5.0                                                         
!                                                                       
!   Authors:  Paul N. Swarztrauber and Richard A. Valent                
!                                                                       
!   $Id: r1f4kf.f,v 1.2 2004/06/15 21:29:20 rodney Exp $                
!                                                                       
!CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC
                                                                        
      SUBROUTINE R1F4KF (IDO,L1,CC,IN1,CH,IN2,WA1,WA2,WA3) 
      REAL       CC(IN1,IDO,L1,4)   ,CH(IN2,IDO,4,L1)     ,             &
     &           WA1(IDO)           ,WA2(IDO)     ,WA3(IDO)             
!                                                                       
      HSQT2=SQRT(2.)/2. 
      DO 101 K=1,L1 
         CH(1,1,1,K) = (CC(1,1,K,2)+CC(1,1,K,4))                        &
     &      +(CC(1,1,K,1)+CC(1,1,K,3))                                  
         CH(1,IDO,4,K) = (CC(1,1,K,1)+CC(1,1,K,3))                      &
     &      -(CC(1,1,K,2)+CC(1,1,K,4))                                  
         CH(1,IDO,2,K) = CC(1,1,K,1)-CC(1,1,K,3) 
         CH(1,1,3,K) = CC(1,1,K,4)-CC(1,1,K,2) 
  101 END DO 
      IF (IDO-2) 107,105,102 
  102 IDP2 = IDO+2 
      DO 104 K=1,L1 
         DO 103 I=3,IDO,2 
            IC = IDP2-I 
            CH(1,I-1,1,K) = ((WA1(I-2)*CC(1,I-1,K,2)+WA1(I-1)*          &
     &       CC(1,I,K,2))+(WA3(I-2)*CC(1,I-1,K,4)+WA3(I-1)*             &
     &       CC(1,I,K,4)))+(CC(1,I-1,K,1)+(WA2(I-2)*CC(1,I-1,K,3)+      &
     &       WA2(I-1)*CC(1,I,K,3)))                                     
            CH(1,IC-1,4,K) = (CC(1,I-1,K,1)+(WA2(I-2)*CC(1,I-1,K,3)+    &
     &       WA2(I-1)*CC(1,I,K,3)))-((WA1(I-2)*CC(1,I-1,K,2)+           &
     &       WA1(I-1)*CC(1,I,K,2))+(WA3(I-2)*CC(1,I-1,K,4)+             &
     &       WA3(I-1)*CC(1,I,K,4)))                                     
            CH(1,I,1,K) = ((WA1(I-2)*CC(1,I,K,2)-WA1(I-1)*              &
     &       CC(1,I-1,K,2))+(WA3(I-2)*CC(1,I,K,4)-WA3(I-1)*             &
     &       CC(1,I-1,K,4)))+(CC(1,I,K,1)+(WA2(I-2)*CC(1,I,K,3)-        &
     &       WA2(I-1)*CC(1,I-1,K,3)))                                   
            CH(1,IC,4,K) = ((WA1(I-2)*CC(1,I,K,2)-WA1(I-1)*             &
     &       CC(1,I-1,K,2))+(WA3(I-2)*CC(1,I,K,4)-WA3(I-1)*             &
     &       CC(1,I-1,K,4)))-(CC(1,I,K,1)+(WA2(I-2)*CC(1,I,K,3)-        &
     &       WA2(I-1)*CC(1,I-1,K,3)))                                   
            CH(1,I-1,3,K) = ((WA1(I-2)*CC(1,I,K,2)-WA1(I-1)*            &
     &       CC(1,I-1,K,2))-(WA3(I-2)*CC(1,I,K,4)-WA3(I-1)*             &
     &       CC(1,I-1,K,4)))+(CC(1,I-1,K,1)-(WA2(I-2)*CC(1,I-1,K,3)+    &
     &       WA2(I-1)*CC(1,I,K,3)))                                     
            CH(1,IC-1,2,K) = (CC(1,I-1,K,1)-(WA2(I-2)*CC(1,I-1,K,3)+    &
     &       WA2(I-1)*CC(1,I,K,3)))-((WA1(I-2)*CC(1,I,K,2)-WA1(I-1)*    &
     &       CC(1,I-1,K,2))-(WA3(I-2)*CC(1,I,K,4)-WA3(I-1)*             &
     &       CC(1,I-1,K,4)))                                            
            CH(1,I,3,K) = ((WA3(I-2)*CC(1,I-1,K,4)+WA3(I-1)*            &
     &       CC(1,I,K,4))-(WA1(I-2)*CC(1,I-1,K,2)+WA1(I-1)*             &
     &       CC(1,I,K,2)))+(CC(1,I,K,1)-(WA2(I-2)*CC(1,I,K,3)-          &
     &       WA2(I-1)*CC(1,I-1,K,3)))                                   
            CH(1,IC,2,K) = ((WA3(I-2)*CC(1,I-1,K,4)+WA3(I-1)*           &
     &       CC(1,I,K,4))-(WA1(I-2)*CC(1,I-1,K,2)+WA1(I-1)*             &
     &       CC(1,I,K,2)))-(CC(1,I,K,1)-(WA2(I-2)*CC(1,I,K,3)-          &
     &       WA2(I-1)*CC(1,I-1,K,3)))                                   
  103    CONTINUE 
  104 END DO 
      IF (MOD(IDO,2) .EQ. 1) RETURN 
  105 CONTINUE 
      DO 106 K=1,L1 
            CH(1,IDO,1,K) = (HSQT2*(CC(1,IDO,K,2)-CC(1,IDO,K,4)))+      &
     &       CC(1,IDO,K,1)                                              
            CH(1,IDO,3,K) = CC(1,IDO,K,1)-(HSQT2*(CC(1,IDO,K,2)-        &
     &       CC(1,IDO,K,4)))                                            
            CH(1,1,2,K) = (-HSQT2*(CC(1,IDO,K,2)+CC(1,IDO,K,4)))-       &
     &       CC(1,IDO,K,3)                                              
            CH(1,1,4,K) = (-HSQT2*(CC(1,IDO,K,2)+CC(1,IDO,K,4)))+       &
     &       CC(1,IDO,K,3)                                              
  106 END DO 
  107 RETURN 
      END                                           
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