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[jabaws.git] / website / archive / binaries / mac / src / disembl / Tisean_3.0.1 / source_f / slatec / radb4.f

diff --git a/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/slatec/radb4.f b/website/archive/binaries/mac/src/disembl/Tisean_3.0.1/source_f/slatec/radb4.f
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-*DECK RADB4
-      SUBROUTINE RADB4 (IDO, L1, CC, CH, WA1, WA2, WA3)
-C***BEGIN PROLOGUE  RADB4
-C***SUBSIDIARY
-C***PURPOSE  Calculate the fast Fourier transform of subvectors of
-C            length four.
-C***LIBRARY   SLATEC (FFTPACK)
-C***TYPE      SINGLE PRECISION (RADB4-S)
-C***AUTHOR  Swarztrauber, P. N., (NCAR)
-C***ROUTINES CALLED  (NONE)
-C***REVISION HISTORY  (YYMMDD)
-C   790601  DATE WRITTEN
-C   830401  Modified to use SLATEC library source file format.
-C   860115  Modified by Ron Boisvert to adhere to Fortran 77 by
-C           (a) changing dummy array size declarations (1) to (*),
-C           (b) changing definition of variable SQRT2 by using
-C               FORTRAN intrinsic function SQRT instead of a DATA
-C               statement.
-C   881128  Modified by Dick Valent to meet prologue standards.
-C   890831  Modified array declarations.  (WRB)
-C   891214  Prologue converted to Version 4.0 format.  (BAB)
-C   900402  Added TYPE section.  (WRB)
-C***END PROLOGUE  RADB4
-      DIMENSION CC(IDO,4,*), CH(IDO,L1,4), WA1(*), WA2(*), WA3(*)
-C***FIRST EXECUTABLE STATEMENT  RADB4
-      SQRT2 = SQRT(2.)
-      DO 101 K=1,L1
-         TR1 = CC(1,1,K)-CC(IDO,4,K)
-         TR2 = CC(1,1,K)+CC(IDO,4,K)
-         TR3 = CC(IDO,2,K)+CC(IDO,2,K)
-         TR4 = CC(1,3,K)+CC(1,3,K)
-         CH(1,K,1) = TR2+TR3
-         CH(1,K,2) = TR1-TR4
-         CH(1,K,3) = TR2-TR3
-         CH(1,K,4) = TR1+TR4
-  101 CONTINUE
-      IF (IDO-2) 107,105,102
-  102 IDP2 = IDO+2
-      IF((IDO-1)/2.LT.L1) GO TO 108
-      DO 104 K=1,L1
-CDIR$ IVDEP
-         DO 103 I=3,IDO,2
-            IC = IDP2-I
-            TI1 = CC(I,1,K)+CC(IC,4,K)
-            TI2 = CC(I,1,K)-CC(IC,4,K)
-            TI3 = CC(I,3,K)-CC(IC,2,K)
-            TR4 = CC(I,3,K)+CC(IC,2,K)
-            TR1 = CC(I-1,1,K)-CC(IC-1,4,K)
-            TR2 = CC(I-1,1,K)+CC(IC-1,4,K)
-            TI4 = CC(I-1,3,K)-CC(IC-1,2,K)
-            TR3 = CC(I-1,3,K)+CC(IC-1,2,K)
-            CH(I-1,K,1) = TR2+TR3
-            CR3 = TR2-TR3
-            CH(I,K,1) = TI2+TI3
-            CI3 = TI2-TI3
-            CR2 = TR1-TR4
-            CR4 = TR1+TR4
-            CI2 = TI1+TI4
-            CI4 = TI1-TI4
-            CH(I-1,K,2) = WA1(I-2)*CR2-WA1(I-1)*CI2
-            CH(I,K,2) = WA1(I-2)*CI2+WA1(I-1)*CR2
-            CH(I-1,K,3) = WA2(I-2)*CR3-WA2(I-1)*CI3
-            CH(I,K,3) = WA2(I-2)*CI3+WA2(I-1)*CR3
-            CH(I-1,K,4) = WA3(I-2)*CR4-WA3(I-1)*CI4
-            CH(I,K,4) = WA3(I-2)*CI4+WA3(I-1)*CR4
-  103    CONTINUE
-  104 CONTINUE
-      GO TO 111
-  108 DO 110 I=3,IDO,2
-         IC = IDP2-I
-CDIR$ IVDEP
-         DO 109 K=1,L1
-            TI1 = CC(I,1,K)+CC(IC,4,K)
-            TI2 = CC(I,1,K)-CC(IC,4,K)
-            TI3 = CC(I,3,K)-CC(IC,2,K)
-            TR4 = CC(I,3,K)+CC(IC,2,K)
-            TR1 = CC(I-1,1,K)-CC(IC-1,4,K)
-            TR2 = CC(I-1,1,K)+CC(IC-1,4,K)
-            TI4 = CC(I-1,3,K)-CC(IC-1,2,K)
-            TR3 = CC(I-1,3,K)+CC(IC-1,2,K)
-            CH(I-1,K,1) = TR2+TR3
-            CR3 = TR2-TR3
-            CH(I,K,1) = TI2+TI3
-            CI3 = TI2-TI3
-            CR2 = TR1-TR4
-            CR4 = TR1+TR4
-            CI2 = TI1+TI4
-            CI4 = TI1-TI4
-            CH(I-1,K,2) = WA1(I-2)*CR2-WA1(I-1)*CI2
-            CH(I,K,2) = WA1(I-2)*CI2+WA1(I-1)*CR2
-            CH(I-1,K,3) = WA2(I-2)*CR3-WA2(I-1)*CI3
-            CH(I,K,3) = WA2(I-2)*CI3+WA2(I-1)*CR3
-            CH(I-1,K,4) = WA3(I-2)*CR4-WA3(I-1)*CI4
-            CH(I,K,4) = WA3(I-2)*CI4+WA3(I-1)*CR4
-  109    CONTINUE
-  110 CONTINUE
-  111 IF (MOD(IDO,2) .EQ. 1) RETURN
-  105 DO 106 K=1,L1
-         TI1 = CC(1,2,K)+CC(1,4,K)
-         TI2 = CC(1,4,K)-CC(1,2,K)
-         TR1 = CC(IDO,1,K)-CC(IDO,3,K)
-         TR2 = CC(IDO,1,K)+CC(IDO,3,K)
-         CH(IDO,K,1) = TR2+TR2
-         CH(IDO,K,2) = SQRT2*(TR1-TI1)
-         CH(IDO,K,3) = TI2+TI2
-         CH(IDO,K,4) = -SQRT2*(TR1+TI1)
-  106 CONTINUE
-  107 RETURN
-      END