[1] | 1 | MODULE temperton_fft |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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[258] | 4 | ! Current revisions: |
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[1] | 5 | ! ----------------- |
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[392] | 6 | ! |
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[1] | 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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[3] | 10 | ! $Id: temperton_fft.f90 392 2009-09-24 10:39:14Z raasch $ |
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[392] | 11 | ! |
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| 12 | ! 258 2009-03-13 12:36:03Z heinze |
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| 13 | ! Output of messages replaced by message handling routine. |
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| 14 | ! |
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| 15 | ! Feb. 2007 |
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[3] | 16 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 17 | ! |
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[1] | 18 | ! Revision 1.2 2003/04/16 12:49:25 raasch |
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| 19 | ! Abort in case of illegal factors |
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| 20 | ! |
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| 21 | ! Revision 1.1 2003/03/12 16:41:59 raasch |
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| 22 | ! Initial revision |
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| 23 | ! |
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| 24 | ! |
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| 25 | ! Description: |
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| 26 | ! ------------ |
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| 27 | ! Fast Fourier transformation developed by Clive Temperton, ECMWF. |
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| 28 | !------------------------------------------------------------------------------! |
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| 29 | |
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| 30 | IMPLICIT NONE |
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| 31 | |
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| 32 | PRIVATE |
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| 33 | |
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| 34 | PUBLIC set99, fft991cy |
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| 35 | |
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| 36 | |
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| 37 | INTEGER :: nfax(10) ! array used by *fft991*. |
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| 38 | REAL, ALLOCATABLE :: trig(:) ! array used by *fft991*. |
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| 39 | |
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| 40 | ! |
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| 41 | !-- nfft: maximum length of calls to *fft. |
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| 42 | #if defined( __nec ) |
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| 43 | INTEGER, PARAMETER :: nfft = 256 |
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| 44 | #else |
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| 45 | INTEGER, PARAMETER :: nfft = 32 |
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| 46 | #endif |
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| 47 | |
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| 48 | INTEGER, PARAMETER :: nout = 6 ! standard output stream |
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| 49 | |
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| 50 | CONTAINS |
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| 51 | |
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| 52 | SUBROUTINE fft991cy(a,work,trigs,ifax,inc,jump,n,lot,isign) |
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| 53 | |
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| 54 | ! Description: |
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| 55 | ! |
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| 56 | ! Calls fortran-versions of fft's. |
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| 57 | ! |
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| 58 | ! Method: |
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| 59 | ! |
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| 60 | ! Subroutine 'fft991cy' - multiple fast real periodic transform |
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| 61 | ! supersedes previous routine 'fft991cy'. |
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| 62 | ! |
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| 63 | ! Real transform of length n performed by removing redundant |
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| 64 | ! operations from complex transform of length n. |
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| 65 | ! |
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| 66 | ! a is the array containing input & output data. |
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| 67 | ! work is an area of size (n+1)*min(lot,nfft). |
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| 68 | ! trigs is a previously prepared list of trig function values. |
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| 69 | ! ifax is a previously prepared list of factors of n. |
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| 70 | ! inc is the increment within each data 'vector' |
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| 71 | ! (e.g. inc=1 for consecutively stored data). |
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| 72 | ! jump is the increment between the start of each data vector. |
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| 73 | ! n is the length of the data vectors. |
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| 74 | ! lot is the number of data vectors. |
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| 75 | ! isign = +1 for transform from spectral to gridpoint |
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| 76 | ! = -1 for transform from gridpoint to spectral. |
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| 77 | ! |
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| 78 | ! ordering of coefficients: |
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| 79 | ! a(0),b(0),a(1),b(1),a(2),b(2),.,a(n/2),b(n/2) |
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| 80 | ! where b(0)=b(n/2)=0; (n+2) locations required. |
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| 81 | ! |
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| 82 | ! ordering of data: |
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| 83 | ! x(0),x(1),x(2),.,x(n-1), 0 , 0 ; (n+2) locations required. |
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| 84 | ! |
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| 85 | ! Vectorization is achieved on cray by doing the transforms |
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| 86 | ! in parallel. |
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| 87 | ! |
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| 88 | ! n must be composed of factors 2,3 & 5 but does not have to be even. |
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| 89 | ! |
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| 90 | ! definition of transforms: |
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| 91 | ! |
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| 92 | ! isign=+1: x(j)=sum(k=0,.,n-1)(c(k)*exp(2*i*j*k*pi/n)) |
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| 93 | ! where c(k)=a(k)+i*b(k) and c(n-k)=a(k)-i*b(k) |
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| 94 | |
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| 95 | ! isign=-1: a(k)=(1/n)*sum(j=0,.,n-1)(x(j)*cos(2*j*k*pi/n)) |
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| 96 | ! b(k)=-(1/n)*sum(j=0,.,n-1)(x(j)*sin(2*j*k*pi/n)) |
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| 97 | |
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| 98 | ! calls fortran-versions of fft's !!! |
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| 99 | ! dimension a(n),work(n),trigs(n),ifax(1) |
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| 100 | |
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| 101 | |
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| 102 | IMPLICIT NONE |
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| 103 | |
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| 104 | ! Scalar arguments |
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| 105 | INTEGER :: inc, isign, jump, lot, n |
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| 106 | |
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| 107 | ! Array arguments |
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| 108 | REAL :: a(*), trigs(*), work(*) |
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| 109 | INTEGER :: ifax(*) |
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| 110 | |
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| 111 | ! Local scalars: |
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| 112 | INTEGER :: i, ia, ibase, ierr, ifac, igo, ii, istart, ix, iz, j, jbase, jj, & |
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| 113 | & k, la, nb, nblox, nfax, nvex, nx |
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| 114 | |
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| 115 | ! Intrinsic functions |
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| 116 | INTRINSIC MOD |
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| 117 | |
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| 118 | |
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| 119 | ! Executable statements |
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| 120 | |
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| 121 | IF (ifax(10)/=n) CALL set99(trigs,ifax,n) |
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| 122 | nfax = ifax(1) |
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| 123 | nx = n + 1 |
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| 124 | IF (MOD(n,2)==1) nx = n |
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| 125 | nblox = 1 + (lot-1)/nfft |
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| 126 | nvex = lot - (nblox-1)*nfft |
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| 127 | IF (isign==-1) GO TO 50 |
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| 128 | |
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| 129 | ! isign=+1, spectral to gridpoint transform |
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| 130 | |
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| 131 | istart = 1 |
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| 132 | DO nb = 1, nblox |
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| 133 | ia = istart |
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| 134 | i = istart |
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| 135 | !DIR$ IVDEP |
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| 136 | !CDIR NODEP |
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| 137 | !OCL NOVREC |
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| 138 | DO j = 1, nvex |
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| 139 | a(i+inc) = 0.5*a(i) |
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| 140 | i = i + jump |
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| 141 | END DO |
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| 142 | IF (MOD(n,2)==1) GO TO 10 |
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| 143 | i = istart + n*inc |
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| 144 | DO j = 1, nvex |
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| 145 | a(i) = 0.5*a(i) |
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| 146 | i = i + jump |
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| 147 | END DO |
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| 148 | 10 CONTINUE |
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| 149 | ia = istart + inc |
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| 150 | la = 1 |
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| 151 | igo = + 1 |
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| 152 | |
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| 153 | DO k = 1, nfax |
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| 154 | ifac = ifax(k+1) |
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| 155 | ierr = -1 |
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| 156 | IF (igo==-1) GO TO 20 |
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| 157 | CALL rpassm(a(ia),a(ia+la*inc),work(1),work(ifac*la+1),trigs,inc,1, & |
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| 158 | & jump,nx,nvex,n,ifac,la,ierr) |
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| 159 | GO TO 30 |
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| 160 | 20 CONTINUE |
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| 161 | CALL rpassm(work(1),work(la+1),a(ia),a(ia+ifac*la*inc),trigs,1,inc,nx, & |
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| 162 | & jump,nvex,n,ifac,la,ierr) |
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| 163 | 30 CONTINUE |
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| 164 | IF (ierr/=0) GO TO 100 |
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| 165 | la = ifac*la |
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| 166 | igo = -igo |
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| 167 | ia = istart |
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| 168 | END DO |
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| 169 | |
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| 170 | ! If necessary, copy results back to a |
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| 171 | |
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| 172 | IF (MOD(nfax,2)==0) GO TO 40 |
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| 173 | ibase = 1 |
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| 174 | jbase = ia |
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| 175 | DO jj = 1, nvex |
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| 176 | i = ibase |
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| 177 | j = jbase |
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| 178 | DO ii = 1, n |
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| 179 | a(j) = work(i) |
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| 180 | i = i + 1 |
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| 181 | j = j + inc |
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| 182 | END DO |
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| 183 | ibase = ibase + nx |
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| 184 | jbase = jbase + jump |
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| 185 | END DO |
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| 186 | 40 CONTINUE |
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| 187 | |
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| 188 | ! Fill in zeros at end |
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| 189 | |
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| 190 | ix = istart + n*inc |
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| 191 | !DIR$ IVDEP |
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| 192 | !CDIR NODEP |
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| 193 | !OCL NOVREC |
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| 194 | DO j = 1, nvex |
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| 195 | a(ix) = 0.0 |
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| 196 | a(ix+inc) = 0.0 |
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| 197 | ix = ix + jump |
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| 198 | END DO |
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| 199 | |
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| 200 | istart = istart + nvex*jump |
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| 201 | nvex = nfft |
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| 202 | END DO |
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| 203 | RETURN |
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| 204 | |
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| 205 | ! isign=-1, gridpoint to spectral transform |
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| 206 | |
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| 207 | 50 CONTINUE |
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| 208 | istart = 1 |
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| 209 | DO nb = 1, nblox |
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| 210 | ia = istart |
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| 211 | la = n |
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| 212 | igo = + 1 |
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| 213 | |
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| 214 | DO k = 1, nfax |
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| 215 | ifac = ifax(nfax+2-k) |
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| 216 | la = la/ifac |
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| 217 | ierr = -1 |
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| 218 | IF (igo==-1) GO TO 60 |
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| 219 | CALL qpassm(a(ia),a(ia+ifac*la*inc),work(1),work(la+1),trigs,inc,1, & |
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| 220 | & jump,nx,nvex,n,ifac,la,ierr) |
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| 221 | GO TO 70 |
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| 222 | 60 CONTINUE |
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| 223 | CALL qpassm(work(1),work(ifac*la+1),a(ia),a(ia+la*inc),trigs,1,inc,nx, & |
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| 224 | & jump,nvex,n,ifac,la,ierr) |
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| 225 | 70 CONTINUE |
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| 226 | IF (ierr/=0) GO TO 100 |
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| 227 | igo = -igo |
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| 228 | ia = istart + inc |
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| 229 | END DO |
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| 230 | |
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| 231 | ! If necessary, copy results back to a |
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| 232 | |
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| 233 | IF (MOD(nfax,2)==0) GO TO 80 |
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| 234 | ibase = 1 |
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| 235 | jbase = ia |
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| 236 | DO jj = 1, nvex |
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| 237 | i = ibase |
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| 238 | j = jbase |
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| 239 | DO ii = 1, n |
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| 240 | a(j) = work(i) |
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| 241 | i = i + 1 |
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| 242 | j = j + inc |
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| 243 | END DO |
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| 244 | ibase = ibase + nx |
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| 245 | jbase = jbase + jump |
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| 246 | END DO |
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| 247 | 80 CONTINUE |
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| 248 | |
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| 249 | ! Shift a(0) & fill in zero imag parts |
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| 250 | |
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| 251 | ix = istart |
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| 252 | !DIR$ IVDEP |
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| 253 | !CDIR NODEP |
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| 254 | !OCL NOVREC |
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| 255 | DO j = 1, nvex |
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| 256 | a(ix) = a(ix+inc) |
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| 257 | a(ix+inc) = 0.0 |
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| 258 | ix = ix + jump |
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| 259 | END DO |
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| 260 | IF (MOD(n,2)==1) GO TO 90 |
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| 261 | iz = istart + (n+1)*inc |
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| 262 | DO j = 1, nvex |
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| 263 | a(iz) = 0.0 |
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| 264 | iz = iz + jump |
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| 265 | END DO |
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| 266 | 90 CONTINUE |
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| 267 | |
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| 268 | istart = istart + nvex*jump |
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| 269 | nvex = nfft |
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| 270 | END DO |
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| 271 | RETURN |
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| 272 | |
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| 273 | ! Error messages |
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| 274 | |
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| 275 | 100 CONTINUE |
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| 276 | |
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| 277 | SELECT CASE (ierr) |
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| 278 | CASE (:-1) |
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| 279 | WRITE (nout,'(A,I5,A)') ' Vector length =',nvex,', greater than nfft' |
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| 280 | CASE (0) |
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| 281 | WRITE (nout,'(A,I3,A)') ' Factor =',ifac,', not catered for' |
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| 282 | CASE (1:) |
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| 283 | WRITE (nout,'(A,I3,A)') ' Factor =',ifac,', only catered for if la*ifac=n' |
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| 284 | END SELECT |
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| 285 | |
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| 286 | RETURN |
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| 287 | END SUBROUTINE fft991cy |
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| 288 | |
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| 289 | SUBROUTINE qpassm(a,b,c,d,trigs,inc1,inc2,inc3,inc4,lot,n,ifac,la,ierr) |
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| 290 | |
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| 291 | ! Description: |
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| 292 | ! |
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| 293 | ! Performs one pass through data as part of |
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| 294 | ! multiple real fft (fourier analysis) routine. |
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| 295 | ! |
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| 296 | ! Method: |
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| 297 | ! |
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| 298 | ! a is first real input vector |
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| 299 | ! equivalence b(1) with a(ifac*la*inc1+1) |
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| 300 | ! c is first real output vector |
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| 301 | ! equivalence d(1) with c(la*inc2+1) |
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| 302 | ! trigs is a precalculated list of sines & cosines |
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| 303 | ! inc1 is the addressing increment for a |
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| 304 | ! inc2 is the addressing increment for c |
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| 305 | ! inc3 is the increment between input vectors a |
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| 306 | ! inc4 is the increment between output vectors c |
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| 307 | ! lot is the number of vectors |
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| 308 | ! n is the length of the vectors |
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| 309 | ! ifac is the current factor of n |
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| 310 | ! la = n/(product of factors used so far) |
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| 311 | ! ierr is an error indicator: |
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| 312 | ! 0 - pass completed without error |
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| 313 | ! 1 - lot greater than nfft |
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| 314 | ! 2 - ifac not catered for |
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| 315 | ! 3 - ifac only catered for if la=n/ifac |
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| 316 | ! |
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| 317 | |
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| 318 | IMPLICIT NONE |
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| 319 | |
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| 320 | ! Scalar arguments |
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| 321 | INTEGER :: ierr, ifac, inc1, inc2, inc3, inc4, la, lot, n |
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| 322 | |
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| 323 | ! Array arguments |
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| 324 | ! REAL :: a(n),b(n),c(n),d(n),trigs(n) |
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| 325 | REAL :: a(*), b(*), c(*), d(*), trigs(*) |
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| 326 | |
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| 327 | ! Local scalars: |
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| 328 | REAL :: a0, a1, a10, a11, a2, a20, a21, a3, a4, a5, a6, b0, b1, b10, b11, & |
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| 329 | & b2, b20, b21, b3, b4, b5, b6, c1, c2, c3, c4, c5, qrt5, s1, s2, s3, s4, & |
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| 330 | & s5, sin36, sin45, sin60, sin72, z, zqrt5, zsin36, zsin45, zsin60, & |
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| 331 | & zsin72 |
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| 332 | INTEGER :: i, ia, ib, ibad, ibase, ic, id, ie, if, ig, igo, ih, iink, ijk, & |
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| 333 | & ijump, j, ja, jb, jbase, jc, jd, je, jf, jink, k, kb, kc, kd, ke, kf, & |
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| 334 | & kstop, l, m |
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| 335 | |
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| 336 | ! Intrinsic functions |
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| 337 | INTRINSIC REAL, SQRT |
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| 338 | |
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| 339 | ! Data statements |
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| 340 | DATA sin36/0.587785252292473/, sin72/0.951056516295154/, & |
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| 341 | & qrt5/0.559016994374947/, sin60/0.866025403784437/ |
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| 342 | |
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| 343 | |
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| 344 | ! Executable statements |
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| 345 | |
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| 346 | m = n/ifac |
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| 347 | iink = la*inc1 |
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| 348 | jink = la*inc2 |
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| 349 | ijump = (ifac-1)*iink |
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| 350 | kstop = (n-ifac)/(2*ifac) |
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| 351 | |
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| 352 | ibad = 1 |
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| 353 | IF (lot>nfft) GO TO 180 |
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| 354 | ibase = 0 |
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| 355 | jbase = 0 |
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| 356 | igo = ifac - 1 |
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| 357 | IF (igo==7) igo = 6 |
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| 358 | ibad = 2 |
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| 359 | IF (igo<1 .OR. igo>6) GO TO 180 |
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| 360 | GO TO (10,40,70,100,130,160) igo |
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| 361 | |
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| 362 | ! Coding for factor 2 |
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| 363 | |
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| 364 | 10 CONTINUE |
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| 365 | ia = 1 |
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| 366 | ib = ia + iink |
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| 367 | ja = 1 |
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| 368 | jb = ja + (2*m-la)*inc2 |
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| 369 | |
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| 370 | IF (la==m) GO TO 30 |
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| 371 | |
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| 372 | DO l = 1, la |
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| 373 | i = ibase |
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| 374 | j = jbase |
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| 375 | !DIR$ IVDEP |
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| 376 | !CDIR NODEP |
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| 377 | !OCL NOVREC |
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| 378 | DO ijk = 1, lot |
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| 379 | c(ja+j) = a(ia+i) + a(ib+i) |
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| 380 | c(jb+j) = a(ia+i) - a(ib+i) |
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| 381 | i = i + inc3 |
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| 382 | j = j + inc4 |
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| 383 | END DO |
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| 384 | ibase = ibase + inc1 |
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| 385 | jbase = jbase + inc2 |
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| 386 | END DO |
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| 387 | ja = ja + jink |
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| 388 | jink = 2*jink |
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| 389 | jb = jb - jink |
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| 390 | ibase = ibase + ijump |
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| 391 | ijump = 2*ijump + iink |
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| 392 | IF (ja==jb) GO TO 20 |
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| 393 | DO k = la, kstop, la |
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| 394 | kb = k + k |
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| 395 | c1 = trigs(kb+1) |
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| 396 | s1 = trigs(kb+2) |
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| 397 | jbase = 0 |
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| 398 | DO l = 1, la |
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| 399 | i = ibase |
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| 400 | j = jbase |
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| 401 | !DIR$ IVDEP |
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| 402 | !CDIR NODEP |
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| 403 | !OCL NOVREC |
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| 404 | DO ijk = 1, lot |
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| 405 | c(ja+j) = a(ia+i) + (c1*a(ib+i)+s1*b(ib+i)) |
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| 406 | c(jb+j) = a(ia+i) - (c1*a(ib+i)+s1*b(ib+i)) |
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| 407 | d(ja+j) = (c1*b(ib+i)-s1*a(ib+i)) + b(ia+i) |
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| 408 | d(jb+j) = (c1*b(ib+i)-s1*a(ib+i)) - b(ia+i) |
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| 409 | i = i + inc3 |
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| 410 | j = j + inc4 |
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| 411 | END DO |
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| 412 | ibase = ibase + inc1 |
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| 413 | jbase = jbase + inc2 |
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| 414 | END DO |
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| 415 | ibase = ibase + ijump |
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| 416 | ja = ja + jink |
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| 417 | jb = jb - jink |
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| 418 | END DO |
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| 419 | IF (ja>jb) GO TO 170 |
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| 420 | 20 CONTINUE |
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| 421 | jbase = 0 |
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| 422 | DO l = 1, la |
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| 423 | i = ibase |
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| 424 | j = jbase |
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| 425 | !DIR$ IVDEP |
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| 426 | !CDIR NODEP |
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| 427 | !OCL NOVREC |
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| 428 | DO ijk = 1, lot |
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| 429 | c(ja+j) = a(ia+i) |
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| 430 | d(ja+j) = -a(ib+i) |
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| 431 | i = i + inc3 |
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| 432 | j = j + inc4 |
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| 433 | END DO |
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| 434 | ibase = ibase + inc1 |
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| 435 | jbase = jbase + inc2 |
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| 436 | END DO |
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| 437 | |
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| 438 | GO TO 170 |
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| 439 | 30 CONTINUE |
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| 440 | z = 1.0/REAL(n) |
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| 441 | DO l = 1, la |
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| 442 | i = ibase |
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| 443 | j = jbase |
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| 444 | !DIR$ IVDEP |
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| 445 | !CDIR NODEP |
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| 446 | !OCL NOVREC |
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| 447 | DO ijk = 1, lot |
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| 448 | c(ja+j) = z*(a(ia+i)+a(ib+i)) |
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| 449 | c(jb+j) = z*(a(ia+i)-a(ib+i)) |
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| 450 | i = i + inc3 |
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| 451 | j = j + inc4 |
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| 452 | END DO |
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| 453 | ibase = ibase + inc1 |
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| 454 | jbase = jbase + inc2 |
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| 455 | END DO |
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| 456 | GO TO 170 |
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| 457 | |
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| 458 | ! Coding for factor 3 |
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| 459 | |
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| 460 | 40 CONTINUE |
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| 461 | ia = 1 |
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| 462 | ib = ia + iink |
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| 463 | ic = ib + iink |
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| 464 | ja = 1 |
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| 465 | jb = ja + (2*m-la)*inc2 |
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| 466 | jc = jb |
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| 467 | |
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| 468 | IF (la==m) GO TO 60 |
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| 469 | |
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| 470 | DO l = 1, la |
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| 471 | i = ibase |
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| 472 | j = jbase |
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| 473 | !DIR$ IVDEP |
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| 474 | !CDIR NODEP |
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| 475 | !OCL NOVREC |
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| 476 | DO ijk = 1, lot |
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| 477 | c(ja+j) = a(ia+i) + (a(ib+i)+a(ic+i)) |
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| 478 | c(jb+j) = a(ia+i) - 0.5*(a(ib+i)+a(ic+i)) |
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| 479 | d(jb+j) = sin60*(a(ic+i)-a(ib+i)) |
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| 480 | i = i + inc3 |
---|
| 481 | j = j + inc4 |
---|
| 482 | END DO |
---|
| 483 | ibase = ibase + inc1 |
---|
| 484 | jbase = jbase + inc2 |
---|
| 485 | END DO |
---|
| 486 | ja = ja + jink |
---|
| 487 | jink = 2*jink |
---|
| 488 | jb = jb + jink |
---|
| 489 | jc = jc - jink |
---|
| 490 | ibase = ibase + ijump |
---|
| 491 | ijump = 2*ijump + iink |
---|
| 492 | IF (ja==jc) GO TO 50 |
---|
| 493 | DO k = la, kstop, la |
---|
| 494 | kb = k + k |
---|
| 495 | kc = kb + kb |
---|
| 496 | c1 = trigs(kb+1) |
---|
| 497 | s1 = trigs(kb+2) |
---|
| 498 | c2 = trigs(kc+1) |
---|
| 499 | s2 = trigs(kc+2) |
---|
| 500 | jbase = 0 |
---|
| 501 | DO l = 1, la |
---|
| 502 | i = ibase |
---|
| 503 | j = jbase |
---|
| 504 | !DIR$ IVDEP |
---|
| 505 | !CDIR NODEP |
---|
| 506 | !OCL NOVREC |
---|
| 507 | DO ijk = 1, lot |
---|
| 508 | a1 = (c1*a(ib+i)+s1*b(ib+i)) + (c2*a(ic+i)+s2*b(ic+i)) |
---|
| 509 | b1 = (c1*b(ib+i)-s1*a(ib+i)) + (c2*b(ic+i)-s2*a(ic+i)) |
---|
| 510 | a2 = a(ia+i) - 0.5*a1 |
---|
| 511 | b2 = b(ia+i) - 0.5*b1 |
---|
| 512 | a3 = sin60*((c1*a(ib+i)+s1*b(ib+i))-(c2*a(ic+i)+s2*b(ic+i))) |
---|
| 513 | b3 = sin60*((c1*b(ib+i)-s1*a(ib+i))-(c2*b(ic+i)-s2*a(ic+i))) |
---|
| 514 | c(ja+j) = a(ia+i) + a1 |
---|
| 515 | d(ja+j) = b(ia+i) + b1 |
---|
| 516 | c(jb+j) = a2 + b3 |
---|
| 517 | d(jb+j) = b2 - a3 |
---|
| 518 | c(jc+j) = a2 - b3 |
---|
| 519 | d(jc+j) = -(b2+a3) |
---|
| 520 | i = i + inc3 |
---|
| 521 | j = j + inc4 |
---|
| 522 | END DO |
---|
| 523 | ibase = ibase + inc1 |
---|
| 524 | jbase = jbase + inc2 |
---|
| 525 | END DO |
---|
| 526 | ibase = ibase + ijump |
---|
| 527 | ja = ja + jink |
---|
| 528 | jb = jb + jink |
---|
| 529 | jc = jc - jink |
---|
| 530 | END DO |
---|
| 531 | IF (ja>jc) GO TO 170 |
---|
| 532 | 50 CONTINUE |
---|
| 533 | jbase = 0 |
---|
| 534 | DO l = 1, la |
---|
| 535 | i = ibase |
---|
| 536 | j = jbase |
---|
| 537 | !DIR$ IVDEP |
---|
| 538 | !CDIR NODEP |
---|
| 539 | !OCL NOVREC |
---|
| 540 | DO ijk = 1, lot |
---|
| 541 | c(ja+j) = a(ia+i) + 0.5*(a(ib+i)-a(ic+i)) |
---|
| 542 | d(ja+j) = -sin60*(a(ib+i)+a(ic+i)) |
---|
| 543 | c(jb+j) = a(ia+i) - (a(ib+i)-a(ic+i)) |
---|
| 544 | i = i + inc3 |
---|
| 545 | j = j + inc4 |
---|
| 546 | END DO |
---|
| 547 | ibase = ibase + inc1 |
---|
| 548 | jbase = jbase + inc2 |
---|
| 549 | END DO |
---|
| 550 | |
---|
| 551 | GO TO 170 |
---|
| 552 | 60 CONTINUE |
---|
| 553 | z = 1.0/REAL(n) |
---|
| 554 | zsin60 = z*sin60 |
---|
| 555 | DO l = 1, la |
---|
| 556 | i = ibase |
---|
| 557 | j = jbase |
---|
| 558 | !DIR$ IVDEP |
---|
| 559 | !CDIR NODEP |
---|
| 560 | !OCL NOVREC |
---|
| 561 | DO ijk = 1, lot |
---|
| 562 | c(ja+j) = z*(a(ia+i)+(a(ib+i)+a(ic+i))) |
---|
| 563 | c(jb+j) = z*(a(ia+i)-0.5*(a(ib+i)+a(ic+i))) |
---|
| 564 | d(jb+j) = zsin60*(a(ic+i)-a(ib+i)) |
---|
| 565 | i = i + inc3 |
---|
| 566 | j = j + inc4 |
---|
| 567 | END DO |
---|
| 568 | ibase = ibase + inc1 |
---|
| 569 | jbase = jbase + inc2 |
---|
| 570 | END DO |
---|
| 571 | GO TO 170 |
---|
| 572 | |
---|
| 573 | ! Coding for factor 4 |
---|
| 574 | |
---|
| 575 | 70 CONTINUE |
---|
| 576 | ia = 1 |
---|
| 577 | ib = ia + iink |
---|
| 578 | ic = ib + iink |
---|
| 579 | id = ic + iink |
---|
| 580 | ja = 1 |
---|
| 581 | jb = ja + (2*m-la)*inc2 |
---|
| 582 | jc = jb + 2*m*inc2 |
---|
| 583 | jd = jb |
---|
| 584 | |
---|
| 585 | IF (la==m) GO TO 90 |
---|
| 586 | |
---|
| 587 | DO l = 1, la |
---|
| 588 | i = ibase |
---|
| 589 | j = jbase |
---|
| 590 | !DIR$ IVDEP |
---|
| 591 | !CDIR NODEP |
---|
| 592 | !OCL NOVREC |
---|
| 593 | DO ijk = 1, lot |
---|
| 594 | c(ja+j) = (a(ia+i)+a(ic+i)) + (a(ib+i)+a(id+i)) |
---|
| 595 | c(jc+j) = (a(ia+i)+a(ic+i)) - (a(ib+i)+a(id+i)) |
---|
| 596 | c(jb+j) = a(ia+i) - a(ic+i) |
---|
| 597 | d(jb+j) = a(id+i) - a(ib+i) |
---|
| 598 | i = i + inc3 |
---|
| 599 | j = j + inc4 |
---|
| 600 | END DO |
---|
| 601 | ibase = ibase + inc1 |
---|
| 602 | jbase = jbase + inc2 |
---|
| 603 | END DO |
---|
| 604 | ja = ja + jink |
---|
| 605 | jink = 2*jink |
---|
| 606 | jb = jb + jink |
---|
| 607 | jc = jc - jink |
---|
| 608 | jd = jd - jink |
---|
| 609 | ibase = ibase + ijump |
---|
| 610 | ijump = 2*ijump + iink |
---|
| 611 | IF (jb==jc) GO TO 80 |
---|
| 612 | DO k = la, kstop, la |
---|
| 613 | kb = k + k |
---|
| 614 | kc = kb + kb |
---|
| 615 | kd = kc + kb |
---|
| 616 | c1 = trigs(kb+1) |
---|
| 617 | s1 = trigs(kb+2) |
---|
| 618 | c2 = trigs(kc+1) |
---|
| 619 | s2 = trigs(kc+2) |
---|
| 620 | c3 = trigs(kd+1) |
---|
| 621 | s3 = trigs(kd+2) |
---|
| 622 | jbase = 0 |
---|
| 623 | DO l = 1, la |
---|
| 624 | i = ibase |
---|
| 625 | j = jbase |
---|
| 626 | !DIR$ IVDEP |
---|
| 627 | !CDIR NODEP |
---|
| 628 | !OCL NOVREC |
---|
| 629 | DO ijk = 1, lot |
---|
| 630 | a0 = a(ia+i) + (c2*a(ic+i)+s2*b(ic+i)) |
---|
| 631 | a2 = a(ia+i) - (c2*a(ic+i)+s2*b(ic+i)) |
---|
| 632 | a1 = (c1*a(ib+i)+s1*b(ib+i)) + (c3*a(id+i)+s3*b(id+i)) |
---|
| 633 | a3 = (c1*a(ib+i)+s1*b(ib+i)) - (c3*a(id+i)+s3*b(id+i)) |
---|
| 634 | b0 = b(ia+i) + (c2*b(ic+i)-s2*a(ic+i)) |
---|
| 635 | b2 = b(ia+i) - (c2*b(ic+i)-s2*a(ic+i)) |
---|
| 636 | b1 = (c1*b(ib+i)-s1*a(ib+i)) + (c3*b(id+i)-s3*a(id+i)) |
---|
| 637 | b3 = (c1*b(ib+i)-s1*a(ib+i)) - (c3*b(id+i)-s3*a(id+i)) |
---|
| 638 | c(ja+j) = a0 + a1 |
---|
| 639 | c(jc+j) = a0 - a1 |
---|
| 640 | d(ja+j) = b0 + b1 |
---|
| 641 | d(jc+j) = b1 - b0 |
---|
| 642 | c(jb+j) = a2 + b3 |
---|
| 643 | c(jd+j) = a2 - b3 |
---|
| 644 | d(jb+j) = b2 - a3 |
---|
| 645 | d(jd+j) = -(b2+a3) |
---|
| 646 | i = i + inc3 |
---|
| 647 | j = j + inc4 |
---|
| 648 | END DO |
---|
| 649 | ibase = ibase + inc1 |
---|
| 650 | jbase = jbase + inc2 |
---|
| 651 | END DO |
---|
| 652 | ibase = ibase + ijump |
---|
| 653 | ja = ja + jink |
---|
| 654 | jb = jb + jink |
---|
| 655 | jc = jc - jink |
---|
| 656 | jd = jd - jink |
---|
| 657 | END DO |
---|
| 658 | IF (jb>jc) GO TO 170 |
---|
| 659 | 80 CONTINUE |
---|
| 660 | sin45 = SQRT(0.5) |
---|
| 661 | jbase = 0 |
---|
| 662 | DO l = 1, la |
---|
| 663 | i = ibase |
---|
| 664 | j = jbase |
---|
| 665 | !DIR$ IVDEP |
---|
| 666 | !CDIR NODEP |
---|
| 667 | !OCL NOVREC |
---|
| 668 | DO ijk = 1, lot |
---|
| 669 | c(ja+j) = a(ia+i) + sin45*(a(ib+i)-a(id+i)) |
---|
| 670 | c(jb+j) = a(ia+i) - sin45*(a(ib+i)-a(id+i)) |
---|
| 671 | d(ja+j) = -a(ic+i) - sin45*(a(ib+i)+a(id+i)) |
---|
| 672 | d(jb+j) = a(ic+i) - sin45*(a(ib+i)+a(id+i)) |
---|
| 673 | i = i + inc3 |
---|
| 674 | j = j + inc4 |
---|
| 675 | END DO |
---|
| 676 | ibase = ibase + inc1 |
---|
| 677 | jbase = jbase + inc2 |
---|
| 678 | END DO |
---|
| 679 | |
---|
| 680 | GO TO 170 |
---|
| 681 | 90 CONTINUE |
---|
| 682 | z = 1.0/REAL(n) |
---|
| 683 | DO l = 1, la |
---|
| 684 | i = ibase |
---|
| 685 | j = jbase |
---|
| 686 | !DIR$ IVDEP |
---|
| 687 | !CDIR NODEP |
---|
| 688 | !OCL NOVREC |
---|
| 689 | DO ijk = 1, lot |
---|
| 690 | c(ja+j) = z*((a(ia+i)+a(ic+i))+(a(ib+i)+a(id+i))) |
---|
| 691 | c(jc+j) = z*((a(ia+i)+a(ic+i))-(a(ib+i)+a(id+i))) |
---|
| 692 | c(jb+j) = z*(a(ia+i)-a(ic+i)) |
---|
| 693 | d(jb+j) = z*(a(id+i)-a(ib+i)) |
---|
| 694 | i = i + inc3 |
---|
| 695 | j = j + inc4 |
---|
| 696 | END DO |
---|
| 697 | ibase = ibase + inc1 |
---|
| 698 | jbase = jbase + inc2 |
---|
| 699 | END DO |
---|
| 700 | GO TO 170 |
---|
| 701 | |
---|
| 702 | ! Coding for factor 5 |
---|
| 703 | |
---|
| 704 | 100 CONTINUE |
---|
| 705 | ia = 1 |
---|
| 706 | ib = ia + iink |
---|
| 707 | ic = ib + iink |
---|
| 708 | id = ic + iink |
---|
| 709 | ie = id + iink |
---|
| 710 | ja = 1 |
---|
| 711 | jb = ja + (2*m-la)*inc2 |
---|
| 712 | jc = jb + 2*m*inc2 |
---|
| 713 | jd = jc |
---|
| 714 | je = jb |
---|
| 715 | |
---|
| 716 | IF (la==m) GO TO 120 |
---|
| 717 | |
---|
| 718 | DO l = 1, la |
---|
| 719 | i = ibase |
---|
| 720 | j = jbase |
---|
| 721 | !DIR$ IVDEP |
---|
| 722 | !CDIR NODEP |
---|
| 723 | !OCL NOVREC |
---|
| 724 | DO ijk = 1, lot |
---|
| 725 | a1 = a(ib+i) + a(ie+i) |
---|
| 726 | a3 = a(ib+i) - a(ie+i) |
---|
| 727 | a2 = a(ic+i) + a(id+i) |
---|
| 728 | a4 = a(ic+i) - a(id+i) |
---|
| 729 | a5 = a(ia+i) - 0.25*(a1+a2) |
---|
| 730 | a6 = qrt5*(a1-a2) |
---|
| 731 | c(ja+j) = a(ia+i) + (a1+a2) |
---|
| 732 | c(jb+j) = a5 + a6 |
---|
| 733 | c(jc+j) = a5 - a6 |
---|
| 734 | d(jb+j) = -sin72*a3 - sin36*a4 |
---|
| 735 | d(jc+j) = -sin36*a3 + sin72*a4 |
---|
| 736 | i = i + inc3 |
---|
| 737 | j = j + inc4 |
---|
| 738 | END DO |
---|
| 739 | ibase = ibase + inc1 |
---|
| 740 | jbase = jbase + inc2 |
---|
| 741 | END DO |
---|
| 742 | ja = ja + jink |
---|
| 743 | jink = 2*jink |
---|
| 744 | jb = jb + jink |
---|
| 745 | jc = jc + jink |
---|
| 746 | jd = jd - jink |
---|
| 747 | je = je - jink |
---|
| 748 | ibase = ibase + ijump |
---|
| 749 | ijump = 2*ijump + iink |
---|
| 750 | IF (jb==jd) GO TO 110 |
---|
| 751 | DO k = la, kstop, la |
---|
| 752 | kb = k + k |
---|
| 753 | kc = kb + kb |
---|
| 754 | kd = kc + kb |
---|
| 755 | ke = kd + kb |
---|
| 756 | c1 = trigs(kb+1) |
---|
| 757 | s1 = trigs(kb+2) |
---|
| 758 | c2 = trigs(kc+1) |
---|
| 759 | s2 = trigs(kc+2) |
---|
| 760 | c3 = trigs(kd+1) |
---|
| 761 | s3 = trigs(kd+2) |
---|
| 762 | c4 = trigs(ke+1) |
---|
| 763 | s4 = trigs(ke+2) |
---|
| 764 | jbase = 0 |
---|
| 765 | DO l = 1, la |
---|
| 766 | i = ibase |
---|
| 767 | j = jbase |
---|
| 768 | !DIR$ IVDEP |
---|
| 769 | !CDIR NODEP |
---|
| 770 | !OCL NOVREC |
---|
| 771 | DO ijk = 1, lot |
---|
| 772 | a1 = (c1*a(ib+i)+s1*b(ib+i)) + (c4*a(ie+i)+s4*b(ie+i)) |
---|
| 773 | a3 = (c1*a(ib+i)+s1*b(ib+i)) - (c4*a(ie+i)+s4*b(ie+i)) |
---|
| 774 | a2 = (c2*a(ic+i)+s2*b(ic+i)) + (c3*a(id+i)+s3*b(id+i)) |
---|
| 775 | a4 = (c2*a(ic+i)+s2*b(ic+i)) - (c3*a(id+i)+s3*b(id+i)) |
---|
| 776 | b1 = (c1*b(ib+i)-s1*a(ib+i)) + (c4*b(ie+i)-s4*a(ie+i)) |
---|
| 777 | b3 = (c1*b(ib+i)-s1*a(ib+i)) - (c4*b(ie+i)-s4*a(ie+i)) |
---|
| 778 | b2 = (c2*b(ic+i)-s2*a(ic+i)) + (c3*b(id+i)-s3*a(id+i)) |
---|
| 779 | b4 = (c2*b(ic+i)-s2*a(ic+i)) - (c3*b(id+i)-s3*a(id+i)) |
---|
| 780 | a5 = a(ia+i) - 0.25*(a1+a2) |
---|
| 781 | a6 = qrt5*(a1-a2) |
---|
| 782 | b5 = b(ia+i) - 0.25*(b1+b2) |
---|
| 783 | b6 = qrt5*(b1-b2) |
---|
| 784 | a10 = a5 + a6 |
---|
| 785 | a20 = a5 - a6 |
---|
| 786 | b10 = b5 + b6 |
---|
| 787 | b20 = b5 - b6 |
---|
| 788 | a11 = sin72*b3 + sin36*b4 |
---|
| 789 | a21 = sin36*b3 - sin72*b4 |
---|
| 790 | b11 = sin72*a3 + sin36*a4 |
---|
| 791 | b21 = sin36*a3 - sin72*a4 |
---|
| 792 | c(ja+j) = a(ia+i) + (a1+a2) |
---|
| 793 | c(jb+j) = a10 + a11 |
---|
| 794 | c(je+j) = a10 - a11 |
---|
| 795 | c(jc+j) = a20 + a21 |
---|
| 796 | c(jd+j) = a20 - a21 |
---|
| 797 | d(ja+j) = b(ia+i) + (b1+b2) |
---|
| 798 | d(jb+j) = b10 - b11 |
---|
| 799 | d(je+j) = -(b10+b11) |
---|
| 800 | d(jc+j) = b20 - b21 |
---|
| 801 | d(jd+j) = -(b20+b21) |
---|
| 802 | i = i + inc3 |
---|
| 803 | j = j + inc4 |
---|
| 804 | END DO |
---|
| 805 | ibase = ibase + inc1 |
---|
| 806 | jbase = jbase + inc2 |
---|
| 807 | END DO |
---|
| 808 | ibase = ibase + ijump |
---|
| 809 | ja = ja + jink |
---|
| 810 | jb = jb + jink |
---|
| 811 | jc = jc + jink |
---|
| 812 | jd = jd - jink |
---|
| 813 | je = je - jink |
---|
| 814 | END DO |
---|
| 815 | IF (jb>jd) GO TO 170 |
---|
| 816 | 110 CONTINUE |
---|
| 817 | jbase = 0 |
---|
| 818 | DO l = 1, la |
---|
| 819 | i = ibase |
---|
| 820 | j = jbase |
---|
| 821 | !DIR$ IVDEP |
---|
| 822 | !CDIR NODEP |
---|
| 823 | !OCL NOVREC |
---|
| 824 | DO ijk = 1, lot |
---|
| 825 | a1 = a(ib+i) + a(ie+i) |
---|
| 826 | a3 = a(ib+i) - a(ie+i) |
---|
| 827 | a2 = a(ic+i) + a(id+i) |
---|
| 828 | a4 = a(ic+i) - a(id+i) |
---|
| 829 | a5 = a(ia+i) + 0.25*(a3-a4) |
---|
| 830 | a6 = qrt5*(a3+a4) |
---|
| 831 | c(ja+j) = a5 + a6 |
---|
| 832 | c(jb+j) = a5 - a6 |
---|
| 833 | c(jc+j) = a(ia+i) - (a3-a4) |
---|
| 834 | d(ja+j) = -sin36*a1 - sin72*a2 |
---|
| 835 | d(jb+j) = -sin72*a1 + sin36*a2 |
---|
| 836 | i = i + inc3 |
---|
| 837 | j = j + inc4 |
---|
| 838 | END DO |
---|
| 839 | ibase = ibase + inc1 |
---|
| 840 | jbase = jbase + inc2 |
---|
| 841 | END DO |
---|
| 842 | |
---|
| 843 | GO TO 170 |
---|
| 844 | 120 CONTINUE |
---|
| 845 | z = 1.0/REAL(n) |
---|
| 846 | zqrt5 = z*qrt5 |
---|
| 847 | zsin36 = z*sin36 |
---|
| 848 | zsin72 = z*sin72 |
---|
| 849 | DO l = 1, la |
---|
| 850 | i = ibase |
---|
| 851 | j = jbase |
---|
| 852 | !DIR$ IVDEP |
---|
| 853 | !CDIR NODEP |
---|
| 854 | !OCL NOVREC |
---|
| 855 | DO ijk = 1, lot |
---|
| 856 | a1 = a(ib+i) + a(ie+i) |
---|
| 857 | a3 = a(ib+i) - a(ie+i) |
---|
| 858 | a2 = a(ic+i) + a(id+i) |
---|
| 859 | a4 = a(ic+i) - a(id+i) |
---|
| 860 | a5 = z*(a(ia+i)-0.25*(a1+a2)) |
---|
| 861 | a6 = zqrt5*(a1-a2) |
---|
| 862 | c(ja+j) = z*(a(ia+i)+(a1+a2)) |
---|
| 863 | c(jb+j) = a5 + a6 |
---|
| 864 | c(jc+j) = a5 - a6 |
---|
| 865 | d(jb+j) = -zsin72*a3 - zsin36*a4 |
---|
| 866 | d(jc+j) = -zsin36*a3 + zsin72*a4 |
---|
| 867 | i = i + inc3 |
---|
| 868 | j = j + inc4 |
---|
| 869 | END DO |
---|
| 870 | ibase = ibase + inc1 |
---|
| 871 | jbase = jbase + inc2 |
---|
| 872 | END DO |
---|
| 873 | GO TO 170 |
---|
| 874 | |
---|
| 875 | ! Coding for factor 6 |
---|
| 876 | |
---|
| 877 | 130 CONTINUE |
---|
| 878 | ia = 1 |
---|
| 879 | ib = ia + iink |
---|
| 880 | ic = ib + iink |
---|
| 881 | id = ic + iink |
---|
| 882 | ie = id + iink |
---|
| 883 | if = ie + iink |
---|
| 884 | ja = 1 |
---|
| 885 | jb = ja + (2*m-la)*inc2 |
---|
| 886 | jc = jb + 2*m*inc2 |
---|
| 887 | jd = jc + 2*m*inc2 |
---|
| 888 | je = jc |
---|
| 889 | jf = jb |
---|
| 890 | |
---|
| 891 | IF (la==m) GO TO 150 |
---|
| 892 | |
---|
| 893 | DO l = 1, la |
---|
| 894 | i = ibase |
---|
| 895 | j = jbase |
---|
| 896 | !DIR$ IVDEP |
---|
| 897 | !CDIR NODEP |
---|
| 898 | !OCL NOVREC |
---|
| 899 | DO ijk = 1, lot |
---|
| 900 | a11 = (a(ic+i)+a(if+i)) + (a(ib+i)+a(ie+i)) |
---|
| 901 | c(ja+j) = (a(ia+i)+a(id+i)) + a11 |
---|
| 902 | c(jc+j) = (a(ia+i)+a(id+i)-0.5*a11) |
---|
| 903 | d(jc+j) = sin60*((a(ic+i)+a(if+i))-(a(ib+i)+a(ie+i))) |
---|
| 904 | a11 = (a(ic+i)-a(if+i)) + (a(ie+i)-a(ib+i)) |
---|
| 905 | c(jb+j) = (a(ia+i)-a(id+i)) - 0.5*a11 |
---|
| 906 | d(jb+j) = sin60*((a(ie+i)-a(ib+i))-(a(ic+i)-a(if+i))) |
---|
| 907 | c(jd+j) = (a(ia+i)-a(id+i)) + a11 |
---|
| 908 | i = i + inc3 |
---|
| 909 | j = j + inc4 |
---|
| 910 | END DO |
---|
| 911 | ibase = ibase + inc1 |
---|
| 912 | jbase = jbase + inc2 |
---|
| 913 | END DO |
---|
| 914 | ja = ja + jink |
---|
| 915 | jink = 2*jink |
---|
| 916 | jb = jb + jink |
---|
| 917 | jc = jc + jink |
---|
| 918 | jd = jd - jink |
---|
| 919 | je = je - jink |
---|
| 920 | jf = jf - jink |
---|
| 921 | ibase = ibase + ijump |
---|
| 922 | ijump = 2*ijump + iink |
---|
| 923 | IF (jc==jd) GO TO 140 |
---|
| 924 | DO k = la, kstop, la |
---|
| 925 | kb = k + k |
---|
| 926 | kc = kb + kb |
---|
| 927 | kd = kc + kb |
---|
| 928 | ke = kd + kb |
---|
| 929 | kf = ke + kb |
---|
| 930 | c1 = trigs(kb+1) |
---|
| 931 | s1 = trigs(kb+2) |
---|
| 932 | c2 = trigs(kc+1) |
---|
| 933 | s2 = trigs(kc+2) |
---|
| 934 | c3 = trigs(kd+1) |
---|
| 935 | s3 = trigs(kd+2) |
---|
| 936 | c4 = trigs(ke+1) |
---|
| 937 | s4 = trigs(ke+2) |
---|
| 938 | c5 = trigs(kf+1) |
---|
| 939 | s5 = trigs(kf+2) |
---|
| 940 | jbase = 0 |
---|
| 941 | DO l = 1, la |
---|
| 942 | i = ibase |
---|
| 943 | j = jbase |
---|
| 944 | !DIR$ IVDEP |
---|
| 945 | !CDIR NODEP |
---|
| 946 | !OCL NOVREC |
---|
| 947 | DO ijk = 1, lot |
---|
| 948 | a1 = c1*a(ib+i) + s1*b(ib+i) |
---|
| 949 | b1 = c1*b(ib+i) - s1*a(ib+i) |
---|
| 950 | a2 = c2*a(ic+i) + s2*b(ic+i) |
---|
| 951 | b2 = c2*b(ic+i) - s2*a(ic+i) |
---|
| 952 | a3 = c3*a(id+i) + s3*b(id+i) |
---|
| 953 | b3 = c3*b(id+i) - s3*a(id+i) |
---|
| 954 | a4 = c4*a(ie+i) + s4*b(ie+i) |
---|
| 955 | b4 = c4*b(ie+i) - s4*a(ie+i) |
---|
| 956 | a5 = c5*a(if+i) + s5*b(if+i) |
---|
| 957 | b5 = c5*b(if+i) - s5*a(if+i) |
---|
| 958 | a11 = (a2+a5) + (a1+a4) |
---|
| 959 | a20 = (a(ia+i)+a3) - 0.5*a11 |
---|
| 960 | a21 = sin60*((a2+a5)-(a1+a4)) |
---|
| 961 | b11 = (b2+b5) + (b1+b4) |
---|
| 962 | b20 = (b(ia+i)+b3) - 0.5*b11 |
---|
| 963 | b21 = sin60*((b2+b5)-(b1+b4)) |
---|
| 964 | c(ja+j) = (a(ia+i)+a3) + a11 |
---|
| 965 | d(ja+j) = (b(ia+i)+b3) + b11 |
---|
| 966 | c(jc+j) = a20 - b21 |
---|
| 967 | d(jc+j) = a21 + b20 |
---|
| 968 | c(je+j) = a20 + b21 |
---|
| 969 | d(je+j) = a21 - b20 |
---|
| 970 | a11 = (a2-a5) + (a4-a1) |
---|
| 971 | a20 = (a(ia+i)-a3) - 0.5*a11 |
---|
| 972 | a21 = sin60*((a4-a1)-(a2-a5)) |
---|
| 973 | b11 = (b5-b2) - (b4-b1) |
---|
| 974 | b20 = (b3-b(ia+i)) - 0.5*b11 |
---|
| 975 | b21 = sin60*((b5-b2)+(b4-b1)) |
---|
| 976 | c(jb+j) = a20 - b21 |
---|
| 977 | d(jb+j) = a21 - b20 |
---|
| 978 | c(jd+j) = a11 + (a(ia+i)-a3) |
---|
| 979 | d(jd+j) = b11 + (b3-b(ia+i)) |
---|
| 980 | c(jf+j) = a20 + b21 |
---|
| 981 | d(jf+j) = a21 + b20 |
---|
| 982 | i = i + inc3 |
---|
| 983 | j = j + inc4 |
---|
| 984 | END DO |
---|
| 985 | ibase = ibase + inc1 |
---|
| 986 | jbase = jbase + inc2 |
---|
| 987 | END DO |
---|
| 988 | ibase = ibase + ijump |
---|
| 989 | ja = ja + jink |
---|
| 990 | jb = jb + jink |
---|
| 991 | jc = jc + jink |
---|
| 992 | jd = jd - jink |
---|
| 993 | je = je - jink |
---|
| 994 | jf = jf - jink |
---|
| 995 | END DO |
---|
| 996 | IF (jc>jd) GO TO 170 |
---|
| 997 | 140 CONTINUE |
---|
| 998 | jbase = 0 |
---|
| 999 | DO l = 1, la |
---|
| 1000 | i = ibase |
---|
| 1001 | j = jbase |
---|
| 1002 | !DIR$ IVDEP |
---|
| 1003 | !CDIR NODEP |
---|
| 1004 | !OCL NOVREC |
---|
| 1005 | DO ijk = 1, lot |
---|
| 1006 | c(ja+j) = (a(ia+i)+0.5*(a(ic+i)-a(ie+i))) + sin60*(a(ib+i)-a(if+i)) |
---|
| 1007 | d(ja+j) = -(a(id+i)+0.5*(a(ib+i)+a(if+i))) - sin60*(a(ic+i)+a(ie+i)) |
---|
| 1008 | c(jb+j) = a(ia+i) - (a(ic+i)-a(ie+i)) |
---|
| 1009 | d(jb+j) = a(id+i) - (a(ib+i)+a(if+i)) |
---|
| 1010 | c(jc+j) = (a(ia+i)+0.5*(a(ic+i)-a(ie+i))) - sin60*(a(ib+i)-a(if+i)) |
---|
| 1011 | d(jc+j) = -(a(id+i)+0.5*(a(ib+i)+a(if+i))) + sin60*(a(ic+i)+a(ie+i)) |
---|
| 1012 | i = i + inc3 |
---|
| 1013 | j = j + inc4 |
---|
| 1014 | END DO |
---|
| 1015 | ibase = ibase + inc1 |
---|
| 1016 | jbase = jbase + inc2 |
---|
| 1017 | END DO |
---|
| 1018 | |
---|
| 1019 | GO TO 170 |
---|
| 1020 | 150 CONTINUE |
---|
| 1021 | z = 1.0/REAL(n) |
---|
| 1022 | zsin60 = z*sin60 |
---|
| 1023 | DO l = 1, la |
---|
| 1024 | i = ibase |
---|
| 1025 | j = jbase |
---|
| 1026 | !DIR$ IVDEP |
---|
| 1027 | !CDIR NODEP |
---|
| 1028 | !OCL NOVREC |
---|
| 1029 | DO ijk = 1, lot |
---|
| 1030 | a11 = (a(ic+i)+a(if+i)) + (a(ib+i)+a(ie+i)) |
---|
| 1031 | c(ja+j) = z*((a(ia+i)+a(id+i))+a11) |
---|
| 1032 | c(jc+j) = z*((a(ia+i)+a(id+i))-0.5*a11) |
---|
| 1033 | d(jc+j) = zsin60*((a(ic+i)+a(if+i))-(a(ib+i)+a(ie+i))) |
---|
| 1034 | a11 = (a(ic+i)-a(if+i)) + (a(ie+i)-a(ib+i)) |
---|
| 1035 | c(jb+j) = z*((a(ia+i)-a(id+i))-0.5*a11) |
---|
| 1036 | d(jb+j) = zsin60*((a(ie+i)-a(ib+i))-(a(ic+i)-a(if+i))) |
---|
| 1037 | c(jd+j) = z*((a(ia+i)-a(id+i))+a11) |
---|
| 1038 | i = i + inc3 |
---|
| 1039 | j = j + inc4 |
---|
| 1040 | END DO |
---|
| 1041 | ibase = ibase + inc1 |
---|
| 1042 | jbase = jbase + inc2 |
---|
| 1043 | END DO |
---|
| 1044 | GO TO 170 |
---|
| 1045 | |
---|
| 1046 | ! Coding for factor 8 |
---|
| 1047 | |
---|
| 1048 | 160 CONTINUE |
---|
| 1049 | ibad = 3 |
---|
| 1050 | IF (la/=m) GO TO 180 |
---|
| 1051 | ia = 1 |
---|
| 1052 | ib = ia + iink |
---|
| 1053 | ic = ib + iink |
---|
| 1054 | id = ic + iink |
---|
| 1055 | ie = id + iink |
---|
| 1056 | if = ie + iink |
---|
| 1057 | ig = if + iink |
---|
| 1058 | ih = ig + iink |
---|
| 1059 | ja = 1 |
---|
| 1060 | jb = ja + la*inc2 |
---|
| 1061 | jc = jb + 2*m*inc2 |
---|
| 1062 | jd = jc + 2*m*inc2 |
---|
| 1063 | je = jd + 2*m*inc2 |
---|
| 1064 | z = 1.0/REAL(n) |
---|
| 1065 | zsin45 = z*SQRT(0.5) |
---|
| 1066 | |
---|
| 1067 | DO l = 1, la |
---|
| 1068 | i = ibase |
---|
| 1069 | j = jbase |
---|
| 1070 | !DIR$ IVDEP |
---|
| 1071 | !CDIR NODEP |
---|
| 1072 | !OCL NOVREC |
---|
| 1073 | DO ijk = 1, lot |
---|
| 1074 | c(ja+j) = z*(((a(ia+i)+a(ie+i))+(a(ic+i)+a(ig+i)))+((a(id+i)+ & |
---|
| 1075 | & a(ih+i))+(a(ib+i)+a(if+i)))) |
---|
| 1076 | c(je+j) = z*(((a(ia+i)+a(ie+i))+(a(ic+i)+a(ig+i)))-((a(id+i)+ & |
---|
| 1077 | & a(ih+i))+(a(ib+i)+a(if+i)))) |
---|
| 1078 | c(jc+j) = z*((a(ia+i)+a(ie+i))-(a(ic+i)+a(ig+i))) |
---|
| 1079 | d(jc+j) = z*((a(id+i)+a(ih+i))-(a(ib+i)+a(if+i))) |
---|
| 1080 | c(jb+j) = z*(a(ia+i)-a(ie+i)) + zsin45*((a(ih+i)-a(id+i))-(a(if+ & |
---|
| 1081 | & i)-a(ib+i))) |
---|
| 1082 | c(jd+j) = z*(a(ia+i)-a(ie+i)) - zsin45*((a(ih+i)-a(id+i))-(a(if+ & |
---|
| 1083 | & i)-a(ib+i))) |
---|
| 1084 | d(jb+j) = zsin45*((a(ih+i)-a(id+i))+(a(if+i)-a(ib+i))) + & |
---|
| 1085 | & z*(a(ig+i)-a(ic+i)) |
---|
| 1086 | d(jd+j) = zsin45*((a(ih+i)-a(id+i))+(a(if+i)-a(ib+i))) - & |
---|
| 1087 | & z*(a(ig+i)-a(ic+i)) |
---|
| 1088 | i = i + inc3 |
---|
| 1089 | j = j + inc4 |
---|
| 1090 | END DO |
---|
| 1091 | ibase = ibase + inc1 |
---|
| 1092 | jbase = jbase + inc2 |
---|
| 1093 | END DO |
---|
| 1094 | |
---|
| 1095 | ! Return |
---|
| 1096 | |
---|
| 1097 | 170 CONTINUE |
---|
| 1098 | ibad = 0 |
---|
| 1099 | 180 CONTINUE |
---|
| 1100 | ierr = ibad |
---|
| 1101 | RETURN |
---|
| 1102 | END SUBROUTINE qpassm |
---|
| 1103 | |
---|
| 1104 | SUBROUTINE rpassm(a,b,c,d,trigs,inc1,inc2,inc3,inc4,lot,n,ifac,la,ierr) |
---|
| 1105 | ! Dimension a(n),b(n),c(n),d(n),trigs(n) |
---|
| 1106 | |
---|
| 1107 | IMPLICIT NONE |
---|
| 1108 | |
---|
| 1109 | ! Scalar arguments |
---|
| 1110 | INTEGER :: ierr, ifac, inc1, inc2, inc3, inc4, la, lot, n |
---|
| 1111 | |
---|
| 1112 | ! Array arguments |
---|
| 1113 | REAL :: a(*), b(*), c(*), d(*), trigs(*) |
---|
| 1114 | |
---|
| 1115 | ! Local scalars: |
---|
| 1116 | REAL :: c1, c2, c3, c4, c5, qqrt5, qrt5, s1, s2, s3, s4, s5, sin36, sin45, & |
---|
| 1117 | & sin60, sin72, ssin36, ssin45, ssin60, ssin72 |
---|
| 1118 | INTEGER :: i, ia, ib, ibad, ibase, ic, id, ie, if, igo, iink, ijk, j, ja, & |
---|
| 1119 | & jb, jbase, jc, jd, je, jf, jg, jh, jink, jump, k, kb, kc, kd, ke, kf, & |
---|
| 1120 | & kstop, l, m |
---|
| 1121 | |
---|
| 1122 | ! Local arrays: |
---|
| 1123 | REAL :: a10(nfft), a11(nfft), a20(nfft), a21(nfft), b10(nfft), b11(nfft), b20(nfft), & |
---|
| 1124 | & b21(nfft) |
---|
| 1125 | |
---|
| 1126 | ! Intrinsic functions |
---|
| 1127 | INTRINSIC SQRT |
---|
| 1128 | |
---|
| 1129 | ! Data statements |
---|
| 1130 | DATA sin36/0.587785252292473/, sin72/0.951056516295154/, & |
---|
| 1131 | & qrt5/0.559016994374947/, sin60/0.866025403784437/ |
---|
| 1132 | |
---|
| 1133 | |
---|
| 1134 | ! Executable statements |
---|
| 1135 | |
---|
| 1136 | m = n/ifac |
---|
| 1137 | iink = la*inc1 |
---|
| 1138 | jink = la*inc2 |
---|
| 1139 | jump = (ifac-1)*jink |
---|
| 1140 | kstop = (n-ifac)/(2*ifac) |
---|
| 1141 | |
---|
| 1142 | ibad = 1 |
---|
| 1143 | IF (lot>nfft) GO TO 180 |
---|
| 1144 | ibase = 0 |
---|
| 1145 | jbase = 0 |
---|
| 1146 | igo = ifac - 1 |
---|
| 1147 | IF (igo==7) igo = 6 |
---|
| 1148 | ibad = 2 |
---|
| 1149 | IF (igo<1 .OR. igo>6) GO TO 180 |
---|
| 1150 | GO TO (10,40,70,100,130,160) igo |
---|
| 1151 | |
---|
| 1152 | ! Coding for factor 2 |
---|
| 1153 | |
---|
| 1154 | 10 CONTINUE |
---|
| 1155 | ia = 1 |
---|
| 1156 | ib = ia + (2*m-la)*inc1 |
---|
| 1157 | ja = 1 |
---|
| 1158 | jb = ja + jink |
---|
| 1159 | |
---|
| 1160 | IF (la==m) GO TO 30 |
---|
| 1161 | |
---|
| 1162 | DO l = 1, la |
---|
| 1163 | i = ibase |
---|
| 1164 | j = jbase |
---|
| 1165 | !DIR$ IVDEP |
---|
| 1166 | !CDIR NODEP |
---|
| 1167 | !OCL NOVREC |
---|
| 1168 | DO ijk = 1, lot |
---|
| 1169 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1170 | c(jb+j) = a(ia+i) - a(ib+i) |
---|
| 1171 | i = i + inc3 |
---|
| 1172 | j = j + inc4 |
---|
| 1173 | END DO |
---|
| 1174 | ibase = ibase + inc1 |
---|
| 1175 | jbase = jbase + inc2 |
---|
| 1176 | END DO |
---|
| 1177 | ia = ia + iink |
---|
| 1178 | iink = 2*iink |
---|
| 1179 | ib = ib - iink |
---|
| 1180 | ibase = 0 |
---|
| 1181 | jbase = jbase + jump |
---|
| 1182 | jump = 2*jump + jink |
---|
| 1183 | IF (ia==ib) GO TO 20 |
---|
| 1184 | DO k = la, kstop, la |
---|
| 1185 | kb = k + k |
---|
| 1186 | c1 = trigs(kb+1) |
---|
| 1187 | s1 = trigs(kb+2) |
---|
| 1188 | ibase = 0 |
---|
| 1189 | DO l = 1, la |
---|
| 1190 | i = ibase |
---|
| 1191 | j = jbase |
---|
| 1192 | !DIR$ IVDEP |
---|
| 1193 | !CDIR NODEP |
---|
| 1194 | !OCL NOVREC |
---|
| 1195 | DO ijk = 1, lot |
---|
| 1196 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1197 | d(ja+j) = b(ia+i) - b(ib+i) |
---|
| 1198 | c(jb+j) = c1*(a(ia+i)-a(ib+i)) - s1*(b(ia+i)+b(ib+i)) |
---|
| 1199 | d(jb+j) = s1*(a(ia+i)-a(ib+i)) + c1*(b(ia+i)+b(ib+i)) |
---|
| 1200 | i = i + inc3 |
---|
| 1201 | j = j + inc4 |
---|
| 1202 | END DO |
---|
| 1203 | ibase = ibase + inc1 |
---|
| 1204 | jbase = jbase + inc2 |
---|
| 1205 | END DO |
---|
| 1206 | ia = ia + iink |
---|
| 1207 | ib = ib - iink |
---|
| 1208 | jbase = jbase + jump |
---|
| 1209 | END DO |
---|
| 1210 | IF (ia>ib) GO TO 170 |
---|
| 1211 | 20 CONTINUE |
---|
| 1212 | ibase = 0 |
---|
| 1213 | DO l = 1, la |
---|
| 1214 | i = ibase |
---|
| 1215 | j = jbase |
---|
| 1216 | !DIR$ IVDEP |
---|
| 1217 | !CDIR NODEP |
---|
| 1218 | !OCL NOVREC |
---|
| 1219 | DO ijk = 1, lot |
---|
| 1220 | c(ja+j) = a(ia+i) |
---|
| 1221 | c(jb+j) = -b(ia+i) |
---|
| 1222 | i = i + inc3 |
---|
| 1223 | j = j + inc4 |
---|
| 1224 | END DO |
---|
| 1225 | ibase = ibase + inc1 |
---|
| 1226 | jbase = jbase + inc2 |
---|
| 1227 | END DO |
---|
| 1228 | |
---|
| 1229 | GO TO 170 |
---|
| 1230 | 30 CONTINUE |
---|
| 1231 | DO l = 1, la |
---|
| 1232 | i = ibase |
---|
| 1233 | j = jbase |
---|
| 1234 | !DIR$ IVDEP |
---|
| 1235 | !CDIR NODEP |
---|
| 1236 | !OCL NOVREC |
---|
| 1237 | DO ijk = 1, lot |
---|
| 1238 | c(ja+j) = 2.0*(a(ia+i)+a(ib+i)) |
---|
| 1239 | c(jb+j) = 2.0*(a(ia+i)-a(ib+i)) |
---|
| 1240 | i = i + inc3 |
---|
| 1241 | j = j + inc4 |
---|
| 1242 | END DO |
---|
| 1243 | ibase = ibase + inc1 |
---|
| 1244 | jbase = jbase + inc2 |
---|
| 1245 | END DO |
---|
| 1246 | GO TO 170 |
---|
| 1247 | |
---|
| 1248 | ! Coding for factor 3 |
---|
| 1249 | |
---|
| 1250 | 40 CONTINUE |
---|
| 1251 | ia = 1 |
---|
| 1252 | ib = ia + (2*m-la)*inc1 |
---|
| 1253 | ic = ib |
---|
| 1254 | ja = 1 |
---|
| 1255 | jb = ja + jink |
---|
| 1256 | jc = jb + jink |
---|
| 1257 | |
---|
| 1258 | IF (la==m) GO TO 60 |
---|
| 1259 | |
---|
| 1260 | DO l = 1, la |
---|
| 1261 | i = ibase |
---|
| 1262 | j = jbase |
---|
| 1263 | !DIR$ IVDEP |
---|
| 1264 | !CDIR NODEP |
---|
| 1265 | !OCL NOVREC |
---|
| 1266 | DO ijk = 1, lot |
---|
| 1267 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1268 | c(jb+j) = (a(ia+i)-0.5*a(ib+i)) - (sin60*(b(ib+i))) |
---|
| 1269 | c(jc+j) = (a(ia+i)-0.5*a(ib+i)) + (sin60*(b(ib+i))) |
---|
| 1270 | i = i + inc3 |
---|
| 1271 | j = j + inc4 |
---|
| 1272 | END DO |
---|
| 1273 | ibase = ibase + inc1 |
---|
| 1274 | jbase = jbase + inc2 |
---|
| 1275 | END DO |
---|
| 1276 | ia = ia + iink |
---|
| 1277 | iink = 2*iink |
---|
| 1278 | ib = ib + iink |
---|
| 1279 | ic = ic - iink |
---|
| 1280 | jbase = jbase + jump |
---|
| 1281 | jump = 2*jump + jink |
---|
| 1282 | IF (ia==ic) GO TO 50 |
---|
| 1283 | DO k = la, kstop, la |
---|
| 1284 | kb = k + k |
---|
| 1285 | kc = kb + kb |
---|
| 1286 | c1 = trigs(kb+1) |
---|
| 1287 | s1 = trigs(kb+2) |
---|
| 1288 | c2 = trigs(kc+1) |
---|
| 1289 | s2 = trigs(kc+2) |
---|
| 1290 | ibase = 0 |
---|
| 1291 | DO l = 1, la |
---|
| 1292 | i = ibase |
---|
| 1293 | j = jbase |
---|
| 1294 | !DIR$ IVDEP |
---|
| 1295 | !CDIR NODEP |
---|
| 1296 | !OCL NOVREC |
---|
| 1297 | DO ijk = 1, lot |
---|
| 1298 | c(ja+j) = a(ia+i) + (a(ib+i)+a(ic+i)) |
---|
| 1299 | d(ja+j) = b(ia+i) + (b(ib+i)-b(ic+i)) |
---|
| 1300 | c(jb+j) = c1*((a(ia+i)-0.5*(a(ib+i)+a(ic+i)))-(sin60*(b(ib+i)+ & |
---|
| 1301 | & b(ic+i)))) - s1*((b(ia+i)-0.5*(b(ib+i)-b(ic+i)))+(sin60*(a(ib+i)- & |
---|
| 1302 | & a(ic+i)))) |
---|
| 1303 | d(jb+j) = s1*((a(ia+i)-0.5*(a(ib+i)+a(ic+i)))-(sin60*(b(ib+i)+ & |
---|
| 1304 | & b(ic+i)))) + c1*((b(ia+i)-0.5*(b(ib+i)-b(ic+i)))+(sin60*(a(ib+i)- & |
---|
| 1305 | & a(ic+i)))) |
---|
| 1306 | c(jc+j) = c2*((a(ia+i)-0.5*(a(ib+i)+a(ic+i)))+(sin60*(b(ib+i)+ & |
---|
| 1307 | & b(ic+i)))) - s2*((b(ia+i)-0.5*(b(ib+i)-b(ic+i)))-(sin60*(a(ib+i)- & |
---|
| 1308 | & a(ic+i)))) |
---|
| 1309 | d(jc+j) = s2*((a(ia+i)-0.5*(a(ib+i)+a(ic+i)))+(sin60*(b(ib+i)+ & |
---|
| 1310 | & b(ic+i)))) + c2*((b(ia+i)-0.5*(b(ib+i)-b(ic+i)))-(sin60*(a(ib+i)- & |
---|
| 1311 | & a(ic+i)))) |
---|
| 1312 | i = i + inc3 |
---|
| 1313 | j = j + inc4 |
---|
| 1314 | END DO |
---|
| 1315 | ibase = ibase + inc1 |
---|
| 1316 | jbase = jbase + inc2 |
---|
| 1317 | END DO |
---|
| 1318 | ia = ia + iink |
---|
| 1319 | ib = ib + iink |
---|
| 1320 | ic = ic - iink |
---|
| 1321 | jbase = jbase + jump |
---|
| 1322 | END DO |
---|
| 1323 | IF (ia>ic) GO TO 170 |
---|
| 1324 | 50 CONTINUE |
---|
| 1325 | ibase = 0 |
---|
| 1326 | DO l = 1, la |
---|
| 1327 | i = ibase |
---|
| 1328 | j = jbase |
---|
| 1329 | !DIR$ IVDEP |
---|
| 1330 | !CDIR NODEP |
---|
| 1331 | !OCL NOVREC |
---|
| 1332 | DO ijk = 1, lot |
---|
| 1333 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1334 | c(jb+j) = (0.5*a(ia+i)-a(ib+i)) - (sin60*b(ia+i)) |
---|
| 1335 | c(jc+j) = -(0.5*a(ia+i)-a(ib+i)) - (sin60*b(ia+i)) |
---|
| 1336 | i = i + inc3 |
---|
| 1337 | j = j + inc4 |
---|
| 1338 | END DO |
---|
| 1339 | ibase = ibase + inc1 |
---|
| 1340 | jbase = jbase + inc2 |
---|
| 1341 | END DO |
---|
| 1342 | |
---|
| 1343 | GO TO 170 |
---|
| 1344 | 60 CONTINUE |
---|
| 1345 | ssin60 = 2.0*sin60 |
---|
| 1346 | DO l = 1, la |
---|
| 1347 | i = ibase |
---|
| 1348 | j = jbase |
---|
| 1349 | !DIR$ IVDEP |
---|
| 1350 | !CDIR NODEP |
---|
| 1351 | !OCL NOVREC |
---|
| 1352 | DO ijk = 1, lot |
---|
| 1353 | c(ja+j) = 2.0*(a(ia+i)+a(ib+i)) |
---|
| 1354 | c(jb+j) = (2.0*a(ia+i)-a(ib+i)) - (ssin60*b(ib+i)) |
---|
| 1355 | c(jc+j) = (2.0*a(ia+i)-a(ib+i)) + (ssin60*b(ib+i)) |
---|
| 1356 | i = i + inc3 |
---|
| 1357 | j = j + inc4 |
---|
| 1358 | END DO |
---|
| 1359 | ibase = ibase + inc1 |
---|
| 1360 | jbase = jbase + inc2 |
---|
| 1361 | END DO |
---|
| 1362 | GO TO 170 |
---|
| 1363 | |
---|
| 1364 | ! Coding for factor 4 |
---|
| 1365 | |
---|
| 1366 | 70 CONTINUE |
---|
| 1367 | ia = 1 |
---|
| 1368 | ib = ia + (2*m-la)*inc1 |
---|
| 1369 | ic = ib + 2*m*inc1 |
---|
| 1370 | id = ib |
---|
| 1371 | ja = 1 |
---|
| 1372 | jb = ja + jink |
---|
| 1373 | jc = jb + jink |
---|
| 1374 | jd = jc + jink |
---|
| 1375 | |
---|
| 1376 | IF (la==m) GO TO 90 |
---|
| 1377 | |
---|
| 1378 | DO l = 1, la |
---|
| 1379 | i = ibase |
---|
| 1380 | j = jbase |
---|
| 1381 | !DIR$ IVDEP |
---|
| 1382 | !CDIR NODEP |
---|
| 1383 | !OCL NOVREC |
---|
| 1384 | DO ijk = 1, lot |
---|
| 1385 | c(ja+j) = (a(ia+i)+a(ic+i)) + a(ib+i) |
---|
| 1386 | c(jb+j) = (a(ia+i)-a(ic+i)) - b(ib+i) |
---|
| 1387 | c(jc+j) = (a(ia+i)+a(ic+i)) - a(ib+i) |
---|
| 1388 | c(jd+j) = (a(ia+i)-a(ic+i)) + b(ib+i) |
---|
| 1389 | i = i + inc3 |
---|
| 1390 | j = j + inc4 |
---|
| 1391 | END DO |
---|
| 1392 | ibase = ibase + inc1 |
---|
| 1393 | jbase = jbase + inc2 |
---|
| 1394 | END DO |
---|
| 1395 | ia = ia + iink |
---|
| 1396 | iink = 2*iink |
---|
| 1397 | ib = ib + iink |
---|
| 1398 | ic = ic - iink |
---|
| 1399 | id = id - iink |
---|
| 1400 | jbase = jbase + jump |
---|
| 1401 | jump = 2*jump + jink |
---|
| 1402 | IF (ib==ic) GO TO 80 |
---|
| 1403 | DO k = la, kstop, la |
---|
| 1404 | kb = k + k |
---|
| 1405 | kc = kb + kb |
---|
| 1406 | kd = kc + kb |
---|
| 1407 | c1 = trigs(kb+1) |
---|
| 1408 | s1 = trigs(kb+2) |
---|
| 1409 | c2 = trigs(kc+1) |
---|
| 1410 | s2 = trigs(kc+2) |
---|
| 1411 | c3 = trigs(kd+1) |
---|
| 1412 | s3 = trigs(kd+2) |
---|
| 1413 | ibase = 0 |
---|
| 1414 | DO l = 1, la |
---|
| 1415 | i = ibase |
---|
| 1416 | j = jbase |
---|
| 1417 | !DIR$ IVDEP |
---|
| 1418 | !CDIR NODEP |
---|
| 1419 | !OCL NOVREC |
---|
| 1420 | DO ijk = 1, lot |
---|
| 1421 | c(ja+j) = (a(ia+i)+a(ic+i)) + (a(ib+i)+a(id+i)) |
---|
| 1422 | d(ja+j) = (b(ia+i)-b(ic+i)) + (b(ib+i)-b(id+i)) |
---|
| 1423 | c(jc+j) = c2*((a(ia+i)+a(ic+i))-(a(ib+i)+a(id+i))) - s2*((b(ia+ & |
---|
| 1424 | & i)-b(ic+i))-(b(ib+i)-b(id+i))) |
---|
| 1425 | d(jc+j) = s2*((a(ia+i)+a(ic+i))-(a(ib+i)+a(id+i))) + c2*((b(ia+ & |
---|
| 1426 | & i)-b(ic+i))-(b(ib+i)-b(id+i))) |
---|
| 1427 | c(jb+j) = c1*((a(ia+i)-a(ic+i))-(b(ib+i)+b(id+i))) - s1*((b(ia+ & |
---|
| 1428 | & i)+b(ic+i))+(a(ib+i)-a(id+i))) |
---|
| 1429 | d(jb+j) = s1*((a(ia+i)-a(ic+i))-(b(ib+i)+b(id+i))) + c1*((b(ia+ & |
---|
| 1430 | & i)+b(ic+i))+(a(ib+i)-a(id+i))) |
---|
| 1431 | c(jd+j) = c3*((a(ia+i)-a(ic+i))+(b(ib+i)+b(id+i))) - s3*((b(ia+ & |
---|
| 1432 | & i)+b(ic+i))-(a(ib+i)-a(id+i))) |
---|
| 1433 | d(jd+j) = s3*((a(ia+i)-a(ic+i))+(b(ib+i)+b(id+i))) + c3*((b(ia+ & |
---|
| 1434 | & i)+b(ic+i))-(a(ib+i)-a(id+i))) |
---|
| 1435 | i = i + inc3 |
---|
| 1436 | j = j + inc4 |
---|
| 1437 | END DO |
---|
| 1438 | ibase = ibase + inc1 |
---|
| 1439 | jbase = jbase + inc2 |
---|
| 1440 | END DO |
---|
| 1441 | ia = ia + iink |
---|
| 1442 | ib = ib + iink |
---|
| 1443 | ic = ic - iink |
---|
| 1444 | id = id - iink |
---|
| 1445 | jbase = jbase + jump |
---|
| 1446 | END DO |
---|
| 1447 | IF (ib>ic) GO TO 170 |
---|
| 1448 | 80 CONTINUE |
---|
| 1449 | ibase = 0 |
---|
| 1450 | sin45 = SQRT(0.5) |
---|
| 1451 | DO l = 1, la |
---|
| 1452 | i = ibase |
---|
| 1453 | j = jbase |
---|
| 1454 | !DIR$ IVDEP |
---|
| 1455 | !CDIR NODEP |
---|
| 1456 | !OCL NOVREC |
---|
| 1457 | DO ijk = 1, lot |
---|
| 1458 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1459 | c(jb+j) = sin45*((a(ia+i)-a(ib+i))-(b(ia+i)+b(ib+i))) |
---|
| 1460 | c(jc+j) = b(ib+i) - b(ia+i) |
---|
| 1461 | c(jd+j) = -sin45*((a(ia+i)-a(ib+i))+(b(ia+i)+b(ib+i))) |
---|
| 1462 | i = i + inc3 |
---|
| 1463 | j = j + inc4 |
---|
| 1464 | END DO |
---|
| 1465 | ibase = ibase + inc1 |
---|
| 1466 | jbase = jbase + inc2 |
---|
| 1467 | END DO |
---|
| 1468 | |
---|
| 1469 | GO TO 170 |
---|
| 1470 | 90 CONTINUE |
---|
| 1471 | DO l = 1, la |
---|
| 1472 | i = ibase |
---|
| 1473 | j = jbase |
---|
| 1474 | !DIR$ IVDEP |
---|
| 1475 | !CDIR NODEP |
---|
| 1476 | !OCL NOVREC |
---|
| 1477 | DO ijk = 1, lot |
---|
| 1478 | c(ja+j) = 2.0*((a(ia+i)+a(ic+i))+a(ib+i)) |
---|
| 1479 | c(jb+j) = 2.0*((a(ia+i)-a(ic+i))-b(ib+i)) |
---|
| 1480 | c(jc+j) = 2.0*((a(ia+i)+a(ic+i))-a(ib+i)) |
---|
| 1481 | c(jd+j) = 2.0*((a(ia+i)-a(ic+i))+b(ib+i)) |
---|
| 1482 | i = i + inc3 |
---|
| 1483 | j = j + inc4 |
---|
| 1484 | END DO |
---|
| 1485 | ibase = ibase + inc1 |
---|
| 1486 | jbase = jbase + inc2 |
---|
| 1487 | END DO |
---|
| 1488 | |
---|
| 1489 | ! Coding for factor 5 |
---|
| 1490 | |
---|
| 1491 | GO TO 170 |
---|
| 1492 | 100 CONTINUE |
---|
| 1493 | ia = 1 |
---|
| 1494 | ib = ia + (2*m-la)*inc1 |
---|
| 1495 | ic = ib + 2*m*inc1 |
---|
| 1496 | id = ic |
---|
| 1497 | ie = ib |
---|
| 1498 | ja = 1 |
---|
| 1499 | jb = ja + jink |
---|
| 1500 | jc = jb + jink |
---|
| 1501 | jd = jc + jink |
---|
| 1502 | je = jd + jink |
---|
| 1503 | |
---|
| 1504 | IF (la==m) GO TO 120 |
---|
| 1505 | |
---|
| 1506 | DO l = 1, la |
---|
| 1507 | i = ibase |
---|
| 1508 | j = jbase |
---|
| 1509 | !DIR$ IVDEP |
---|
| 1510 | !CDIR NODEP |
---|
| 1511 | !OCL NOVREC |
---|
| 1512 | DO ijk = 1, lot |
---|
| 1513 | c(ja+j) = a(ia+i) + (a(ib+i)+a(ic+i)) |
---|
| 1514 | c(jb+j) = ((a(ia+i)-0.25*(a(ib+i)+a(ic+i)))+qrt5*(a(ib+i)-a(ic+i))) - & |
---|
| 1515 | & (sin72*b(ib+i)+sin36*b(ic+i)) |
---|
| 1516 | c(jc+j) = ((a(ia+i)-0.25*(a(ib+i)+a(ic+i)))-qrt5*(a(ib+i)-a(ic+i))) - & |
---|
| 1517 | & (sin36*b(ib+i)-sin72*b(ic+i)) |
---|
| 1518 | c(jd+j) = ((a(ia+i)-0.25*(a(ib+i)+a(ic+i)))-qrt5*(a(ib+i)-a(ic+i))) + & |
---|
| 1519 | & (sin36*b(ib+i)-sin72*b(ic+i)) |
---|
| 1520 | c(je+j) = ((a(ia+i)-0.25*(a(ib+i)+a(ic+i)))+qrt5*(a(ib+i)-a(ic+i))) + & |
---|
| 1521 | & (sin72*b(ib+i)+sin36*b(ic+i)) |
---|
| 1522 | i = i + inc3 |
---|
| 1523 | j = j + inc4 |
---|
| 1524 | END DO |
---|
| 1525 | ibase = ibase + inc1 |
---|
| 1526 | jbase = jbase + inc2 |
---|
| 1527 | END DO |
---|
| 1528 | ia = ia + iink |
---|
| 1529 | iink = 2*iink |
---|
| 1530 | ib = ib + iink |
---|
| 1531 | ic = ic + iink |
---|
| 1532 | id = id - iink |
---|
| 1533 | ie = ie - iink |
---|
| 1534 | jbase = jbase + jump |
---|
| 1535 | jump = 2*jump + jink |
---|
| 1536 | IF (ib==id) GO TO 110 |
---|
| 1537 | DO k = la, kstop, la |
---|
| 1538 | kb = k + k |
---|
| 1539 | kc = kb + kb |
---|
| 1540 | kd = kc + kb |
---|
| 1541 | ke = kd + kb |
---|
| 1542 | c1 = trigs(kb+1) |
---|
| 1543 | s1 = trigs(kb+2) |
---|
| 1544 | c2 = trigs(kc+1) |
---|
| 1545 | s2 = trigs(kc+2) |
---|
| 1546 | c3 = trigs(kd+1) |
---|
| 1547 | s3 = trigs(kd+2) |
---|
| 1548 | c4 = trigs(ke+1) |
---|
| 1549 | s4 = trigs(ke+2) |
---|
| 1550 | ibase = 0 |
---|
| 1551 | DO l = 1, la |
---|
| 1552 | i = ibase |
---|
| 1553 | j = jbase |
---|
| 1554 | !DIR$ IVDEP |
---|
| 1555 | !CDIR NODEP |
---|
| 1556 | !OCL NOVREC |
---|
| 1557 | DO ijk = 1, lot |
---|
| 1558 | |
---|
| 1559 | a10(ijk) = (a(ia+i)-0.25*((a(ib+i)+a(ie+i))+(a(ic+i)+a(id+i)))) + & |
---|
| 1560 | & qrt5*((a(ib+i)+a(ie+i))-(a(ic+i)+a(id+i))) |
---|
| 1561 | a20(ijk) = (a(ia+i)-0.25*((a(ib+i)+a(ie+i))+(a(ic+i)+a(id+i)))) - & |
---|
| 1562 | & qrt5*((a(ib+i)+a(ie+i))-(a(ic+i)+a(id+i))) |
---|
| 1563 | b10(ijk) = (b(ia+i)-0.25*((b(ib+i)-b(ie+i))+(b(ic+i)-b(id+i)))) + & |
---|
| 1564 | & qrt5*((b(ib+i)-b(ie+i))-(b(ic+i)-b(id+i))) |
---|
| 1565 | b20(ijk) = (b(ia+i)-0.25*((b(ib+i)-b(ie+i))+(b(ic+i)-b(id+i)))) - & |
---|
| 1566 | & qrt5*((b(ib+i)-b(ie+i))-(b(ic+i)-b(id+i))) |
---|
| 1567 | a11(ijk) = sin72*(b(ib+i)+b(ie+i)) + sin36*(b(ic+i)+b(id+i)) |
---|
| 1568 | a21(ijk) = sin36*(b(ib+i)+b(ie+i)) - sin72*(b(ic+i)+b(id+i)) |
---|
| 1569 | b11(ijk) = sin72*(a(ib+i)-a(ie+i)) + sin36*(a(ic+i)-a(id+i)) |
---|
| 1570 | b21(ijk) = sin36*(a(ib+i)-a(ie+i)) - sin72*(a(ic+i)-a(id+i)) |
---|
| 1571 | |
---|
| 1572 | c(ja+j) = a(ia+i) + ((a(ib+i)+a(ie+i))+(a(ic+i)+a(id+i))) |
---|
| 1573 | d(ja+j) = b(ia+i) + ((b(ib+i)-b(ie+i))+(b(ic+i)-b(id+i))) |
---|
| 1574 | c(jb+j) = c1*(a10(ijk)-a11(ijk)) - s1*(b10(ijk)+b11(ijk)) |
---|
| 1575 | d(jb+j) = s1*(a10(ijk)-a11(ijk)) + c1*(b10(ijk)+b11(ijk)) |
---|
| 1576 | c(je+j) = c4*(a10(ijk)+a11(ijk)) - s4*(b10(ijk)-b11(ijk)) |
---|
| 1577 | d(je+j) = s4*(a10(ijk)+a11(ijk)) + c4*(b10(ijk)-b11(ijk)) |
---|
| 1578 | c(jc+j) = c2*(a20(ijk)-a21(ijk)) - s2*(b20(ijk)+b21(ijk)) |
---|
| 1579 | d(jc+j) = s2*(a20(ijk)-a21(ijk)) + c2*(b20(ijk)+b21(ijk)) |
---|
| 1580 | c(jd+j) = c3*(a20(ijk)+a21(ijk)) - s3*(b20(ijk)-b21(ijk)) |
---|
| 1581 | d(jd+j) = s3*(a20(ijk)+a21(ijk)) + c3*(b20(ijk)-b21(ijk)) |
---|
| 1582 | |
---|
| 1583 | i = i + inc3 |
---|
| 1584 | j = j + inc4 |
---|
| 1585 | END DO |
---|
| 1586 | ibase = ibase + inc1 |
---|
| 1587 | jbase = jbase + inc2 |
---|
| 1588 | END DO |
---|
| 1589 | ia = ia + iink |
---|
| 1590 | ib = ib + iink |
---|
| 1591 | ic = ic + iink |
---|
| 1592 | id = id - iink |
---|
| 1593 | ie = ie - iink |
---|
| 1594 | jbase = jbase + jump |
---|
| 1595 | END DO |
---|
| 1596 | IF (ib>id) GO TO 170 |
---|
| 1597 | 110 CONTINUE |
---|
| 1598 | ibase = 0 |
---|
| 1599 | DO l = 1, la |
---|
| 1600 | i = ibase |
---|
| 1601 | j = jbase |
---|
| 1602 | !DIR$ IVDEP |
---|
| 1603 | !CDIR NODEP |
---|
| 1604 | !OCL NOVREC |
---|
| 1605 | DO ijk = 1, lot |
---|
| 1606 | c(ja+j) = (a(ia+i)+a(ib+i)) + a(ic+i) |
---|
| 1607 | c(jb+j) = (qrt5*(a(ia+i)-a(ib+i))+(0.25*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
| 1608 | & (sin36*b(ia+i)+sin72*b(ib+i)) |
---|
| 1609 | c(je+j) = -(qrt5*(a(ia+i)-a(ib+i))+(0.25*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
| 1610 | & (sin36*b(ia+i)+sin72*b(ib+i)) |
---|
| 1611 | c(jc+j) = (qrt5*(a(ia+i)-a(ib+i))-(0.25*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
| 1612 | & (sin72*b(ia+i)-sin36*b(ib+i)) |
---|
| 1613 | c(jd+j) = -(qrt5*(a(ia+i)-a(ib+i))-(0.25*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
| 1614 | & (sin72*b(ia+i)-sin36*b(ib+i)) |
---|
| 1615 | i = i + inc3 |
---|
| 1616 | j = j + inc4 |
---|
| 1617 | END DO |
---|
| 1618 | ibase = ibase + inc1 |
---|
| 1619 | jbase = jbase + inc2 |
---|
| 1620 | END DO |
---|
| 1621 | |
---|
| 1622 | GO TO 170 |
---|
| 1623 | 120 CONTINUE |
---|
| 1624 | qqrt5 = 2.0*qrt5 |
---|
| 1625 | ssin36 = 2.0*sin36 |
---|
| 1626 | ssin72 = 2.0*sin72 |
---|
| 1627 | DO l = 1, la |
---|
| 1628 | i = ibase |
---|
| 1629 | j = jbase |
---|
| 1630 | !DIR$ IVDEP |
---|
| 1631 | !CDIR NODEP |
---|
| 1632 | !OCL NOVREC |
---|
| 1633 | DO ijk = 1, lot |
---|
| 1634 | c(ja+j) = 2.0*(a(ia+i)+(a(ib+i)+a(ic+i))) |
---|
| 1635 | c(jb+j) = (2.0*(a(ia+i)-0.25*(a(ib+i)+a(ic+i)))+qqrt5*(a(ib+i)-a(ic+ & |
---|
| 1636 | & i))) - (ssin72*b(ib+i)+ssin36*b(ic+i)) |
---|
| 1637 | c(jc+j) = (2.0*(a(ia+i)-0.25*(a(ib+i)+a(ic+i)))-qqrt5*(a(ib+i)-a(ic+ & |
---|
| 1638 | & i))) - (ssin36*b(ib+i)-ssin72*b(ic+i)) |
---|
| 1639 | c(jd+j) = (2.0*(a(ia+i)-0.25*(a(ib+i)+a(ic+i)))-qqrt5*(a(ib+i)-a(ic+ & |
---|
| 1640 | & i))) + (ssin36*b(ib+i)-ssin72*b(ic+i)) |
---|
| 1641 | c(je+j) = (2.0*(a(ia+i)-0.25*(a(ib+i)+a(ic+i)))+qqrt5*(a(ib+i)-a(ic+ & |
---|
| 1642 | & i))) + (ssin72*b(ib+i)+ssin36*b(ic+i)) |
---|
| 1643 | i = i + inc3 |
---|
| 1644 | j = j + inc4 |
---|
| 1645 | END DO |
---|
| 1646 | ibase = ibase + inc1 |
---|
| 1647 | jbase = jbase + inc2 |
---|
| 1648 | END DO |
---|
| 1649 | GO TO 170 |
---|
| 1650 | |
---|
| 1651 | ! Coding for factor 6 |
---|
| 1652 | |
---|
| 1653 | 130 CONTINUE |
---|
| 1654 | ia = 1 |
---|
| 1655 | ib = ia + (2*m-la)*inc1 |
---|
| 1656 | ic = ib + 2*m*inc1 |
---|
| 1657 | id = ic + 2*m*inc1 |
---|
| 1658 | ie = ic |
---|
| 1659 | if = ib |
---|
| 1660 | ja = 1 |
---|
| 1661 | jb = ja + jink |
---|
| 1662 | jc = jb + jink |
---|
| 1663 | jd = jc + jink |
---|
| 1664 | je = jd + jink |
---|
| 1665 | jf = je + jink |
---|
| 1666 | |
---|
| 1667 | IF (la==m) GO TO 150 |
---|
| 1668 | |
---|
| 1669 | DO l = 1, la |
---|
| 1670 | i = ibase |
---|
| 1671 | j = jbase |
---|
| 1672 | !DIR$ IVDEP |
---|
| 1673 | !CDIR NODEP |
---|
| 1674 | !OCL NOVREC |
---|
| 1675 | DO ijk = 1, lot |
---|
| 1676 | c(ja+j) = (a(ia+i)+a(id+i)) + (a(ib+i)+a(ic+i)) |
---|
| 1677 | c(jd+j) = (a(ia+i)-a(id+i)) - (a(ib+i)-a(ic+i)) |
---|
| 1678 | c(jb+j) = ((a(ia+i)-a(id+i))+0.5*(a(ib+i)-a(ic+i))) - (sin60*(b(ib+ & |
---|
| 1679 | & i)+b(ic+i))) |
---|
| 1680 | c(jf+j) = ((a(ia+i)-a(id+i))+0.5*(a(ib+i)-a(ic+i))) + (sin60*(b(ib+ & |
---|
| 1681 | & i)+b(ic+i))) |
---|
| 1682 | c(jc+j) = ((a(ia+i)+a(id+i))-0.5*(a(ib+i)+a(ic+i))) - (sin60*(b(ib+ & |
---|
| 1683 | & i)-b(ic+i))) |
---|
| 1684 | c(je+j) = ((a(ia+i)+a(id+i))-0.5*(a(ib+i)+a(ic+i))) + (sin60*(b(ib+ & |
---|
| 1685 | & i)-b(ic+i))) |
---|
| 1686 | i = i + inc3 |
---|
| 1687 | j = j + inc4 |
---|
| 1688 | END DO |
---|
| 1689 | ibase = ibase + inc1 |
---|
| 1690 | jbase = jbase + inc2 |
---|
| 1691 | END DO |
---|
| 1692 | ia = ia + iink |
---|
| 1693 | iink = 2*iink |
---|
| 1694 | ib = ib + iink |
---|
| 1695 | ic = ic + iink |
---|
| 1696 | id = id - iink |
---|
| 1697 | ie = ie - iink |
---|
| 1698 | if = if - iink |
---|
| 1699 | jbase = jbase + jump |
---|
| 1700 | jump = 2*jump + jink |
---|
| 1701 | IF (ic==id) GO TO 140 |
---|
| 1702 | DO k = la, kstop, la |
---|
| 1703 | kb = k + k |
---|
| 1704 | kc = kb + kb |
---|
| 1705 | kd = kc + kb |
---|
| 1706 | ke = kd + kb |
---|
| 1707 | kf = ke + kb |
---|
| 1708 | c1 = trigs(kb+1) |
---|
| 1709 | s1 = trigs(kb+2) |
---|
| 1710 | c2 = trigs(kc+1) |
---|
| 1711 | s2 = trigs(kc+2) |
---|
| 1712 | c3 = trigs(kd+1) |
---|
| 1713 | s3 = trigs(kd+2) |
---|
| 1714 | c4 = trigs(ke+1) |
---|
| 1715 | s4 = trigs(ke+2) |
---|
| 1716 | c5 = trigs(kf+1) |
---|
| 1717 | s5 = trigs(kf+2) |
---|
| 1718 | ibase = 0 |
---|
| 1719 | DO l = 1, la |
---|
| 1720 | i = ibase |
---|
| 1721 | j = jbase |
---|
| 1722 | !DIR$ IVDEP |
---|
| 1723 | !CDIR NODEP |
---|
| 1724 | !OCL NOVREC |
---|
| 1725 | DO ijk = 1, lot |
---|
| 1726 | |
---|
| 1727 | a11(ijk) = (a(ie+i)+a(ib+i)) + (a(ic+i)+a(if+i)) |
---|
| 1728 | a20(ijk) = (a(ia+i)+a(id+i)) - 0.5*a11(ijk) |
---|
| 1729 | a21(ijk) = sin60*((a(ie+i)+a(ib+i))-(a(ic+i)+a(if+i))) |
---|
| 1730 | b11(ijk) = (b(ib+i)-b(ie+i)) + (b(ic+i)-b(if+i)) |
---|
| 1731 | b20(ijk) = (b(ia+i)-b(id+i)) - 0.5*b11(ijk) |
---|
| 1732 | b21(ijk) = sin60*((b(ib+i)-b(ie+i))-(b(ic+i)-b(if+i))) |
---|
| 1733 | |
---|
| 1734 | c(ja+j) = (a(ia+i)+a(id+i)) + a11(ijk) |
---|
| 1735 | d(ja+j) = (b(ia+i)-b(id+i)) + b11(ijk) |
---|
| 1736 | c(jc+j) = c2*(a20(ijk)-b21(ijk)) - s2*(b20(ijk)+a21(ijk)) |
---|
| 1737 | d(jc+j) = s2*(a20(ijk)-b21(ijk)) + c2*(b20(ijk)+a21(ijk)) |
---|
| 1738 | c(je+j) = c4*(a20(ijk)+b21(ijk)) - s4*(b20(ijk)-a21(ijk)) |
---|
| 1739 | d(je+j) = s4*(a20(ijk)+b21(ijk)) + c4*(b20(ijk)-a21(ijk)) |
---|
| 1740 | |
---|
| 1741 | a11(ijk) = (a(ie+i)-a(ib+i)) + (a(ic+i)-a(if+i)) |
---|
| 1742 | b11(ijk) = (b(ie+i)+b(ib+i)) - (b(ic+i)+b(if+i)) |
---|
| 1743 | a20(ijk) = (a(ia+i)-a(id+i)) - 0.5*a11(ijk) |
---|
| 1744 | a21(ijk) = sin60*((a(ie+i)-a(ib+i))-(a(ic+i)-a(if+i))) |
---|
| 1745 | b20(ijk) = (b(ia+i)+b(id+i)) + 0.5*b11(ijk) |
---|
| 1746 | b21(ijk) = sin60*((b(ie+i)+b(ib+i))+(b(ic+i)+b(if+i))) |
---|
| 1747 | |
---|
| 1748 | c(jd+j) = c3*((a(ia+i)-a(id+i))+a11(ijk)) - s3*((b(ia+i)+b(id+ & |
---|
| 1749 | & i))-b11(ijk)) |
---|
| 1750 | d(jd+j) = s3*((a(ia+i)-a(id+i))+a11(ijk)) + c3*((b(ia+i)+b(id+ & |
---|
| 1751 | & i))-b11(ijk)) |
---|
| 1752 | c(jb+j) = c1*(a20(ijk)-b21(ijk)) - s1*(b20(ijk)-a21(ijk)) |
---|
| 1753 | d(jb+j) = s1*(a20(ijk)-b21(ijk)) + c1*(b20(ijk)-a21(ijk)) |
---|
| 1754 | c(jf+j) = c5*(a20(ijk)+b21(ijk)) - s5*(b20(ijk)+a21(ijk)) |
---|
| 1755 | d(jf+j) = s5*(a20(ijk)+b21(ijk)) + c5*(b20(ijk)+a21(ijk)) |
---|
| 1756 | |
---|
| 1757 | i = i + inc3 |
---|
| 1758 | j = j + inc4 |
---|
| 1759 | END DO |
---|
| 1760 | ibase = ibase + inc1 |
---|
| 1761 | jbase = jbase + inc2 |
---|
| 1762 | END DO |
---|
| 1763 | ia = ia + iink |
---|
| 1764 | ib = ib + iink |
---|
| 1765 | ic = ic + iink |
---|
| 1766 | id = id - iink |
---|
| 1767 | ie = ie - iink |
---|
| 1768 | if = if - iink |
---|
| 1769 | jbase = jbase + jump |
---|
| 1770 | END DO |
---|
| 1771 | IF (ic>id) GO TO 170 |
---|
| 1772 | 140 CONTINUE |
---|
| 1773 | ibase = 0 |
---|
| 1774 | DO l = 1, la |
---|
| 1775 | i = ibase |
---|
| 1776 | j = jbase |
---|
| 1777 | !DIR$ IVDEP |
---|
| 1778 | !CDIR NODEP |
---|
| 1779 | !OCL NOVREC |
---|
| 1780 | DO ijk = 1, lot |
---|
| 1781 | c(ja+j) = a(ib+i) + (a(ia+i)+a(ic+i)) |
---|
| 1782 | c(jd+j) = b(ib+i) - (b(ia+i)+b(ic+i)) |
---|
| 1783 | c(jb+j) = (sin60*(a(ia+i)-a(ic+i))) - (0.5*(b(ia+i)+b(ic+i))+b(ib+i)) |
---|
| 1784 | c(jf+j) = -(sin60*(a(ia+i)-a(ic+i))) - (0.5*(b(ia+i)+b(ic+i))+b(ib+i)) |
---|
| 1785 | c(jc+j) = sin60*(b(ic+i)-b(ia+i)) + (0.5*(a(ia+i)+a(ic+i))-a(ib+i)) |
---|
| 1786 | c(je+j) = sin60*(b(ic+i)-b(ia+i)) - (0.5*(a(ia+i)+a(ic+i))-a(ib+i)) |
---|
| 1787 | i = i + inc3 |
---|
| 1788 | j = j + inc4 |
---|
| 1789 | END DO |
---|
| 1790 | ibase = ibase + inc1 |
---|
| 1791 | jbase = jbase + inc2 |
---|
| 1792 | END DO |
---|
| 1793 | |
---|
| 1794 | GO TO 170 |
---|
| 1795 | 150 CONTINUE |
---|
| 1796 | ssin60 = 2.0*sin60 |
---|
| 1797 | DO l = 1, la |
---|
| 1798 | i = ibase |
---|
| 1799 | j = jbase |
---|
| 1800 | !DIR$ IVDEP |
---|
| 1801 | !CDIR NODEP |
---|
| 1802 | !OCL NOVREC |
---|
| 1803 | DO ijk = 1, lot |
---|
| 1804 | c(ja+j) = (2.0*(a(ia+i)+a(id+i))) + (2.0*(a(ib+i)+a(ic+i))) |
---|
| 1805 | c(jd+j) = (2.0*(a(ia+i)-a(id+i))) - (2.0*(a(ib+i)-a(ic+i))) |
---|
| 1806 | c(jb+j) = (2.0*(a(ia+i)-a(id+i))+(a(ib+i)-a(ic+i))) - (ssin60*(b(ib+ & |
---|
| 1807 | & i)+b(ic+i))) |
---|
| 1808 | c(jf+j) = (2.0*(a(ia+i)-a(id+i))+(a(ib+i)-a(ic+i))) + (ssin60*(b(ib+ & |
---|
| 1809 | & i)+b(ic+i))) |
---|
| 1810 | c(jc+j) = (2.0*(a(ia+i)+a(id+i))-(a(ib+i)+a(ic+i))) - (ssin60*(b(ib+ & |
---|
| 1811 | & i)-b(ic+i))) |
---|
| 1812 | c(je+j) = (2.0*(a(ia+i)+a(id+i))-(a(ib+i)+a(ic+i))) + (ssin60*(b(ib+ & |
---|
| 1813 | & i)-b(ic+i))) |
---|
| 1814 | i = i + inc3 |
---|
| 1815 | j = j + inc4 |
---|
| 1816 | END DO |
---|
| 1817 | ibase = ibase + inc1 |
---|
| 1818 | jbase = jbase + inc2 |
---|
| 1819 | END DO |
---|
| 1820 | GO TO 170 |
---|
| 1821 | |
---|
| 1822 | ! Coding for factor 8 |
---|
| 1823 | |
---|
| 1824 | 160 CONTINUE |
---|
| 1825 | ibad = 3 |
---|
| 1826 | IF (la/=m) GO TO 180 |
---|
| 1827 | ia = 1 |
---|
| 1828 | ib = ia + la*inc1 |
---|
| 1829 | ic = ib + 2*la*inc1 |
---|
| 1830 | id = ic + 2*la*inc1 |
---|
| 1831 | ie = id + 2*la*inc1 |
---|
| 1832 | ja = 1 |
---|
| 1833 | jb = ja + jink |
---|
| 1834 | jc = jb + jink |
---|
| 1835 | jd = jc + jink |
---|
| 1836 | je = jd + jink |
---|
| 1837 | jf = je + jink |
---|
| 1838 | jg = jf + jink |
---|
| 1839 | jh = jg + jink |
---|
| 1840 | ssin45 = SQRT(2.0) |
---|
| 1841 | |
---|
| 1842 | DO l = 1, la |
---|
| 1843 | i = ibase |
---|
| 1844 | j = jbase |
---|
| 1845 | !DIR$ IVDEP |
---|
| 1846 | !CDIR NODEP |
---|
| 1847 | !OCL NOVREC |
---|
| 1848 | DO ijk = 1, lot |
---|
| 1849 | c(ja+j) = 2.0*(((a(ia+i)+a(ie+i))+a(ic+i))+(a(ib+i)+a(id+i))) |
---|
| 1850 | c(je+j) = 2.0*(((a(ia+i)+a(ie+i))+a(ic+i))-(a(ib+i)+a(id+i))) |
---|
| 1851 | c(jc+j) = 2.0*(((a(ia+i)+a(ie+i))-a(ic+i))-(b(ib+i)-b(id+i))) |
---|
| 1852 | c(jg+j) = 2.0*(((a(ia+i)+a(ie+i))-a(ic+i))+(b(ib+i)-b(id+i))) |
---|
| 1853 | c(jb+j) = 2.0*((a(ia+i)-a(ie+i))-b(ic+i)) + ssin45*((a(ib+i)-a(id+ & |
---|
| 1854 | & i))-(b(ib+i)+b(id+i))) |
---|
| 1855 | c(jf+j) = 2.0*((a(ia+i)-a(ie+i))-b(ic+i)) - ssin45*((a(ib+i)-a(id+ & |
---|
| 1856 | & i))-(b(ib+i)+b(id+i))) |
---|
| 1857 | c(jd+j) = 2.0*((a(ia+i)-a(ie+i))+b(ic+i)) - ssin45*((a(ib+i)-a(id+ & |
---|
| 1858 | & i))+(b(ib+i)+b(id+i))) |
---|
| 1859 | c(jh+j) = 2.0*((a(ia+i)-a(ie+i))+b(ic+i)) + ssin45*((a(ib+i)-a(id+ & |
---|
| 1860 | & i))+(b(ib+i)+b(id+i))) |
---|
| 1861 | i = i + inc3 |
---|
| 1862 | j = j + inc4 |
---|
| 1863 | END DO |
---|
| 1864 | ibase = ibase + inc1 |
---|
| 1865 | jbase = jbase + inc2 |
---|
| 1866 | END DO |
---|
| 1867 | |
---|
| 1868 | ! Return |
---|
| 1869 | |
---|
| 1870 | 170 CONTINUE |
---|
| 1871 | ibad = 0 |
---|
| 1872 | 180 CONTINUE |
---|
| 1873 | ierr = ibad |
---|
| 1874 | RETURN |
---|
| 1875 | END SUBROUTINE rpassm |
---|
| 1876 | |
---|
| 1877 | SUBROUTINE set99(trigs,ifax,n) |
---|
| 1878 | |
---|
| 1879 | ! Description: |
---|
| 1880 | ! |
---|
| 1881 | ! Computes factors of n & trigonometric functins required by fft99 & fft991cy |
---|
| 1882 | ! |
---|
| 1883 | ! Method: |
---|
| 1884 | ! |
---|
| 1885 | ! Dimension trigs(n),ifax(1),jfax(10),lfax(7) |
---|
| 1886 | ! |
---|
| 1887 | ! subroutine 'set99' - computes factors of n & trigonometric |
---|
| 1888 | ! functins required by fft99 & fft991cy |
---|
| 1889 | |
---|
| 1890 | |
---|
[258] | 1891 | USE control_parameters |
---|
[1] | 1892 | USE pegrid |
---|
| 1893 | |
---|
| 1894 | IMPLICIT NONE |
---|
| 1895 | |
---|
| 1896 | ! Scalar arguments |
---|
| 1897 | INTEGER :: n |
---|
| 1898 | |
---|
| 1899 | ! Array arguments |
---|
| 1900 | REAL :: trigs(*) |
---|
| 1901 | INTEGER :: ifax(*) |
---|
| 1902 | |
---|
| 1903 | ! Local scalars: |
---|
| 1904 | REAL :: angle, del |
---|
| 1905 | INTEGER :: i, ifac, ixxx, k, l, nfax, nhl, nil, nu |
---|
| 1906 | |
---|
| 1907 | ! Local arrays: |
---|
| 1908 | INTEGER :: jfax(10), lfax(7) |
---|
| 1909 | |
---|
| 1910 | ! Intrinsic functions |
---|
| 1911 | INTRINSIC ASIN, COS, MOD, REAL, SIN |
---|
| 1912 | |
---|
| 1913 | ! Data statements |
---|
| 1914 | DATA lfax/6, 8, 5, 4, 3, 2, 1/ |
---|
| 1915 | |
---|
| 1916 | |
---|
| 1917 | ! Executable statements |
---|
| 1918 | ixxx = 1 |
---|
| 1919 | |
---|
| 1920 | del = 4.0*ASIN(1.0)/REAL(n) |
---|
| 1921 | nil = 0 |
---|
| 1922 | nhl = (n/2) - 1 |
---|
| 1923 | DO k = nil, nhl |
---|
| 1924 | angle = REAL(k)*del |
---|
| 1925 | trigs(2*k+1) = COS(angle) |
---|
| 1926 | trigs(2*k+2) = SIN(angle) |
---|
| 1927 | END DO |
---|
| 1928 | |
---|
| 1929 | ! Find factors of n (8,6,5,4,3,2; only one 8 allowed) |
---|
| 1930 | ! Look for sixes first, store factors in descending order |
---|
| 1931 | nu = n |
---|
| 1932 | ifac = 6 |
---|
| 1933 | k = 0 |
---|
| 1934 | l = 1 |
---|
| 1935 | 10 CONTINUE |
---|
| 1936 | IF (MOD(nu,ifac)/=0) GO TO 30 |
---|
| 1937 | k = k + 1 |
---|
| 1938 | jfax(k) = ifac |
---|
| 1939 | IF (ifac/=8) GO TO 20 |
---|
| 1940 | IF (k==1) GO TO 20 |
---|
| 1941 | jfax(1) = 8 |
---|
| 1942 | jfax(k) = 6 |
---|
| 1943 | 20 CONTINUE |
---|
| 1944 | nu = nu/ifac |
---|
| 1945 | IF (nu==1) GO TO 40 |
---|
| 1946 | IF (ifac/=8) GO TO 10 |
---|
| 1947 | 30 CONTINUE |
---|
| 1948 | l = l + 1 |
---|
| 1949 | ifac = lfax(l) |
---|
| 1950 | IF (ifac>1) GO TO 10 |
---|
| 1951 | |
---|
| 1952 | ! WRITE (nout,'(A,I4,A)') ' n =',n,' - Contains illegal factors' |
---|
[258] | 1953 | message_string = 'number of gridpoints along x or/and y ' // & |
---|
| 1954 | 'contain illegal factors' // & |
---|
| 1955 | '&only factors 8,6,5,4,3,2 are allowed' |
---|
| 1956 | CALL message( 'temperton_fft', 'PA0311', 1, 2, 0, 6, 0 ) |
---|
[1] | 1957 | |
---|
| 1958 | RETURN |
---|
| 1959 | |
---|
| 1960 | ! Now reverse order of factors |
---|
| 1961 | 40 CONTINUE |
---|
| 1962 | nfax = k |
---|
| 1963 | ifax(1) = nfax |
---|
| 1964 | DO i = 1, nfax |
---|
| 1965 | ifax(nfax+2-i) = jfax(i) |
---|
| 1966 | END DO |
---|
| 1967 | ifax(10) = n |
---|
| 1968 | RETURN |
---|
| 1969 | END SUBROUTINE set99 |
---|
| 1970 | |
---|
| 1971 | END MODULE temperton_fft |
---|