[1] | 1 | MODULE temperton_fft |
---|
| 2 | |
---|
| 3 | !------------------------------------------------------------------------------! |
---|
[258] | 4 | ! Current revisions: |
---|
[1] | 5 | ! ----------------- |
---|
[1343] | 6 | ! |
---|
| 7 | ! |
---|
[1321] | 8 | ! Former revisions: |
---|
| 9 | ! ----------------- |
---|
| 10 | ! $Id: temperton_fft.f90 1343 2014-03-26 17:07:58Z maronga $ |
---|
| 11 | ! |
---|
[1343] | 12 | ! 1342 2014-03-26 17:04:47Z kanani |
---|
| 13 | ! REAL constants defined as wp-kind |
---|
| 14 | ! |
---|
[1323] | 15 | ! 1322 2014-03-20 16:38:49Z raasch |
---|
| 16 | ! REAL constants defined as wp-kind |
---|
| 17 | ! |
---|
[1321] | 18 | ! 1320 2014-03-20 08:40:49Z raasch |
---|
[1320] | 19 | ! ONLY-attribute added to USE-statements, |
---|
| 20 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
---|
| 21 | ! kinds are defined in new module kinds, |
---|
| 22 | ! old module precision_kind is removed, |
---|
| 23 | ! revision history before 2012 removed, |
---|
| 24 | ! comment fields (!:) to be used for variable explanations added to |
---|
| 25 | ! all variable declaration statements |
---|
[1] | 26 | ! |
---|
| 27 | ! Revision 1.1 2003/03/12 16:41:59 raasch |
---|
| 28 | ! Initial revision |
---|
| 29 | ! |
---|
| 30 | ! |
---|
| 31 | ! Description: |
---|
| 32 | ! ------------ |
---|
| 33 | ! Fast Fourier transformation developed by Clive Temperton, ECMWF. |
---|
| 34 | !------------------------------------------------------------------------------! |
---|
| 35 | |
---|
[1320] | 36 | USE kinds |
---|
| 37 | |
---|
[1] | 38 | IMPLICIT NONE |
---|
| 39 | |
---|
| 40 | PRIVATE |
---|
| 41 | |
---|
| 42 | PUBLIC set99, fft991cy |
---|
| 43 | |
---|
| 44 | |
---|
[1320] | 45 | INTEGER(iwp) :: nfax(10) !: array used by *fft991*. |
---|
| 46 | REAL(wp), ALLOCATABLE :: trig(:) !: array used by *fft991*. |
---|
[1] | 47 | |
---|
| 48 | ! |
---|
| 49 | !-- nfft: maximum length of calls to *fft. |
---|
| 50 | #if defined( __nec ) |
---|
[1320] | 51 | INTEGER(iwp), PARAMETER :: nfft = 256 !: |
---|
[1] | 52 | #else |
---|
[1320] | 53 | INTEGER(iwp), PARAMETER :: nfft = 32 !: |
---|
[1] | 54 | #endif |
---|
| 55 | |
---|
[1320] | 56 | INTEGER(iwp), PARAMETER :: nout = 6 !: standard output stream |
---|
[1] | 57 | |
---|
| 58 | CONTAINS |
---|
| 59 | |
---|
| 60 | SUBROUTINE fft991cy(a,work,trigs,ifax,inc,jump,n,lot,isign) |
---|
| 61 | |
---|
| 62 | ! Description: |
---|
| 63 | ! |
---|
| 64 | ! Calls fortran-versions of fft's. |
---|
| 65 | ! |
---|
| 66 | ! Method: |
---|
| 67 | ! |
---|
| 68 | ! Subroutine 'fft991cy' - multiple fast real periodic transform |
---|
| 69 | ! supersedes previous routine 'fft991cy'. |
---|
| 70 | ! |
---|
| 71 | ! Real transform of length n performed by removing redundant |
---|
| 72 | ! operations from complex transform of length n. |
---|
| 73 | ! |
---|
| 74 | ! a is the array containing input & output data. |
---|
| 75 | ! work is an area of size (n+1)*min(lot,nfft). |
---|
| 76 | ! trigs is a previously prepared list of trig function values. |
---|
| 77 | ! ifax is a previously prepared list of factors of n. |
---|
| 78 | ! inc is the increment within each data 'vector' |
---|
| 79 | ! (e.g. inc=1 for consecutively stored data). |
---|
| 80 | ! jump is the increment between the start of each data vector. |
---|
| 81 | ! n is the length of the data vectors. |
---|
| 82 | ! lot is the number of data vectors. |
---|
| 83 | ! isign = +1 for transform from spectral to gridpoint |
---|
| 84 | ! = -1 for transform from gridpoint to spectral. |
---|
| 85 | ! |
---|
| 86 | ! ordering of coefficients: |
---|
| 87 | ! a(0),b(0),a(1),b(1),a(2),b(2),.,a(n/2),b(n/2) |
---|
| 88 | ! where b(0)=b(n/2)=0; (n+2) locations required. |
---|
| 89 | ! |
---|
| 90 | ! ordering of data: |
---|
| 91 | ! x(0),x(1),x(2),.,x(n-1), 0 , 0 ; (n+2) locations required. |
---|
| 92 | ! |
---|
| 93 | ! Vectorization is achieved on cray by doing the transforms |
---|
| 94 | ! in parallel. |
---|
| 95 | ! |
---|
| 96 | ! n must be composed of factors 2,3 & 5 but does not have to be even. |
---|
| 97 | ! |
---|
| 98 | ! definition of transforms: |
---|
| 99 | ! |
---|
| 100 | ! isign=+1: x(j)=sum(k=0,.,n-1)(c(k)*exp(2*i*j*k*pi/n)) |
---|
| 101 | ! where c(k)=a(k)+i*b(k) and c(n-k)=a(k)-i*b(k) |
---|
| 102 | |
---|
| 103 | ! isign=-1: a(k)=(1/n)*sum(j=0,.,n-1)(x(j)*cos(2*j*k*pi/n)) |
---|
| 104 | ! b(k)=-(1/n)*sum(j=0,.,n-1)(x(j)*sin(2*j*k*pi/n)) |
---|
| 105 | |
---|
| 106 | ! calls fortran-versions of fft's !!! |
---|
| 107 | ! dimension a(n),work(n),trigs(n),ifax(1) |
---|
| 108 | |
---|
[1320] | 109 | USE kinds |
---|
[1] | 110 | |
---|
| 111 | IMPLICIT NONE |
---|
| 112 | |
---|
| 113 | ! Scalar arguments |
---|
[1320] | 114 | INTEGER(iwp) :: inc !: |
---|
| 115 | INTEGER(iwp) :: isign !: |
---|
| 116 | INTEGER(iwp) :: jump !: |
---|
| 117 | INTEGER(iwp) :: lot !: |
---|
| 118 | INTEGER(iwp) :: n !: |
---|
[1] | 119 | |
---|
| 120 | ! Array arguments |
---|
[1320] | 121 | REAL(wp) :: a(*) !: |
---|
| 122 | REAL(wp) :: trigs(*) !: |
---|
| 123 | REAL(wp) :: work(*) !: |
---|
| 124 | INTEGER(iwp) :: ifax(*) !: |
---|
[1] | 125 | |
---|
| 126 | ! Local scalars: |
---|
[1320] | 127 | INTEGER(iwp) :: i !: |
---|
| 128 | INTEGER(iwp) :: ia !: |
---|
| 129 | INTEGER(iwp) :: ibase !: |
---|
| 130 | INTEGER(iwp) :: ierr !: |
---|
| 131 | INTEGER(iwp) :: ifac !: |
---|
| 132 | INTEGER(iwp) :: igo !: |
---|
| 133 | INTEGER(iwp) :: ii !: |
---|
| 134 | INTEGER(iwp) :: istart !: |
---|
| 135 | INTEGER(iwp) :: ix !: |
---|
| 136 | INTEGER(iwp) :: iz !: |
---|
| 137 | INTEGER(iwp) :: j !: |
---|
| 138 | INTEGER(iwp) :: jbase !: |
---|
| 139 | INTEGER(iwp) :: jj !: |
---|
| 140 | INTEGER(iwp) :: k !: |
---|
| 141 | INTEGER(iwp) :: la !: |
---|
| 142 | INTEGER(iwp) :: nb !: |
---|
| 143 | INTEGER(iwp) :: nblox !: |
---|
| 144 | INTEGER(iwp) :: nfax !: |
---|
| 145 | INTEGER(iwp) :: nvex !: |
---|
| 146 | INTEGER(iwp) :: nx !: |
---|
[1] | 147 | |
---|
| 148 | ! Intrinsic functions |
---|
[1320] | 149 | ! INTRINSIC MOD |
---|
[1] | 150 | |
---|
| 151 | |
---|
| 152 | ! Executable statements |
---|
| 153 | |
---|
| 154 | IF (ifax(10)/=n) CALL set99(trigs,ifax,n) |
---|
| 155 | nfax = ifax(1) |
---|
| 156 | nx = n + 1 |
---|
| 157 | IF (MOD(n,2)==1) nx = n |
---|
| 158 | nblox = 1 + (lot-1)/nfft |
---|
| 159 | nvex = lot - (nblox-1)*nfft |
---|
| 160 | IF (isign==-1) GO TO 50 |
---|
| 161 | |
---|
| 162 | ! isign=+1, spectral to gridpoint transform |
---|
| 163 | |
---|
| 164 | istart = 1 |
---|
| 165 | DO nb = 1, nblox |
---|
| 166 | ia = istart |
---|
| 167 | i = istart |
---|
| 168 | !DIR$ IVDEP |
---|
| 169 | !CDIR NODEP |
---|
| 170 | !OCL NOVREC |
---|
| 171 | DO j = 1, nvex |
---|
[1342] | 172 | a(i+inc) = 0.5_wp*a(i) |
---|
[1] | 173 | i = i + jump |
---|
| 174 | END DO |
---|
| 175 | IF (MOD(n,2)==1) GO TO 10 |
---|
| 176 | i = istart + n*inc |
---|
| 177 | DO j = 1, nvex |
---|
[1342] | 178 | a(i) = 0.5_wp*a(i) |
---|
[1] | 179 | i = i + jump |
---|
| 180 | END DO |
---|
| 181 | 10 CONTINUE |
---|
| 182 | ia = istart + inc |
---|
| 183 | la = 1 |
---|
| 184 | igo = + 1 |
---|
| 185 | |
---|
| 186 | DO k = 1, nfax |
---|
| 187 | ifac = ifax(k+1) |
---|
| 188 | ierr = -1 |
---|
| 189 | IF (igo==-1) GO TO 20 |
---|
| 190 | CALL rpassm(a(ia),a(ia+la*inc),work(1),work(ifac*la+1),trigs,inc,1, & |
---|
| 191 | & jump,nx,nvex,n,ifac,la,ierr) |
---|
| 192 | GO TO 30 |
---|
| 193 | 20 CONTINUE |
---|
| 194 | CALL rpassm(work(1),work(la+1),a(ia),a(ia+ifac*la*inc),trigs,1,inc,nx, & |
---|
| 195 | & jump,nvex,n,ifac,la,ierr) |
---|
| 196 | 30 CONTINUE |
---|
| 197 | IF (ierr/=0) GO TO 100 |
---|
| 198 | la = ifac*la |
---|
| 199 | igo = -igo |
---|
| 200 | ia = istart |
---|
| 201 | END DO |
---|
| 202 | |
---|
| 203 | ! If necessary, copy results back to a |
---|
| 204 | |
---|
| 205 | IF (MOD(nfax,2)==0) GO TO 40 |
---|
| 206 | ibase = 1 |
---|
| 207 | jbase = ia |
---|
| 208 | DO jj = 1, nvex |
---|
| 209 | i = ibase |
---|
| 210 | j = jbase |
---|
| 211 | DO ii = 1, n |
---|
| 212 | a(j) = work(i) |
---|
| 213 | i = i + 1 |
---|
| 214 | j = j + inc |
---|
| 215 | END DO |
---|
| 216 | ibase = ibase + nx |
---|
| 217 | jbase = jbase + jump |
---|
| 218 | END DO |
---|
| 219 | 40 CONTINUE |
---|
| 220 | |
---|
| 221 | ! Fill in zeros at end |
---|
| 222 | |
---|
| 223 | ix = istart + n*inc |
---|
| 224 | !DIR$ IVDEP |
---|
| 225 | !CDIR NODEP |
---|
| 226 | !OCL NOVREC |
---|
| 227 | DO j = 1, nvex |
---|
[1342] | 228 | a(ix) = 0.0_wp |
---|
| 229 | a(ix+inc) = 0.0_wp |
---|
[1] | 230 | ix = ix + jump |
---|
| 231 | END DO |
---|
| 232 | |
---|
| 233 | istart = istart + nvex*jump |
---|
| 234 | nvex = nfft |
---|
| 235 | END DO |
---|
| 236 | RETURN |
---|
| 237 | |
---|
| 238 | ! isign=-1, gridpoint to spectral transform |
---|
| 239 | |
---|
| 240 | 50 CONTINUE |
---|
| 241 | istart = 1 |
---|
| 242 | DO nb = 1, nblox |
---|
| 243 | ia = istart |
---|
| 244 | la = n |
---|
| 245 | igo = + 1 |
---|
| 246 | |
---|
| 247 | DO k = 1, nfax |
---|
| 248 | ifac = ifax(nfax+2-k) |
---|
| 249 | la = la/ifac |
---|
| 250 | ierr = -1 |
---|
| 251 | IF (igo==-1) GO TO 60 |
---|
| 252 | CALL qpassm(a(ia),a(ia+ifac*la*inc),work(1),work(la+1),trigs,inc,1, & |
---|
| 253 | & jump,nx,nvex,n,ifac,la,ierr) |
---|
| 254 | GO TO 70 |
---|
| 255 | 60 CONTINUE |
---|
| 256 | CALL qpassm(work(1),work(ifac*la+1),a(ia),a(ia+la*inc),trigs,1,inc,nx, & |
---|
| 257 | & jump,nvex,n,ifac,la,ierr) |
---|
| 258 | 70 CONTINUE |
---|
| 259 | IF (ierr/=0) GO TO 100 |
---|
| 260 | igo = -igo |
---|
| 261 | ia = istart + inc |
---|
| 262 | END DO |
---|
| 263 | |
---|
| 264 | ! If necessary, copy results back to a |
---|
| 265 | |
---|
| 266 | IF (MOD(nfax,2)==0) GO TO 80 |
---|
| 267 | ibase = 1 |
---|
| 268 | jbase = ia |
---|
| 269 | DO jj = 1, nvex |
---|
| 270 | i = ibase |
---|
| 271 | j = jbase |
---|
| 272 | DO ii = 1, n |
---|
| 273 | a(j) = work(i) |
---|
| 274 | i = i + 1 |
---|
| 275 | j = j + inc |
---|
| 276 | END DO |
---|
| 277 | ibase = ibase + nx |
---|
| 278 | jbase = jbase + jump |
---|
| 279 | END DO |
---|
| 280 | 80 CONTINUE |
---|
| 281 | |
---|
| 282 | ! Shift a(0) & fill in zero imag parts |
---|
| 283 | |
---|
| 284 | ix = istart |
---|
| 285 | !DIR$ IVDEP |
---|
| 286 | !CDIR NODEP |
---|
| 287 | !OCL NOVREC |
---|
| 288 | DO j = 1, nvex |
---|
| 289 | a(ix) = a(ix+inc) |
---|
[1342] | 290 | a(ix+inc) = 0.0_wp |
---|
[1] | 291 | ix = ix + jump |
---|
| 292 | END DO |
---|
| 293 | IF (MOD(n,2)==1) GO TO 90 |
---|
| 294 | iz = istart + (n+1)*inc |
---|
| 295 | DO j = 1, nvex |
---|
[1342] | 296 | a(iz) = 0.0_wp |
---|
[1] | 297 | iz = iz + jump |
---|
| 298 | END DO |
---|
| 299 | 90 CONTINUE |
---|
| 300 | |
---|
| 301 | istart = istart + nvex*jump |
---|
| 302 | nvex = nfft |
---|
| 303 | END DO |
---|
| 304 | RETURN |
---|
| 305 | |
---|
| 306 | ! Error messages |
---|
| 307 | |
---|
| 308 | 100 CONTINUE |
---|
| 309 | |
---|
| 310 | SELECT CASE (ierr) |
---|
| 311 | CASE (:-1) |
---|
| 312 | WRITE (nout,'(A,I5,A)') ' Vector length =',nvex,', greater than nfft' |
---|
| 313 | CASE (0) |
---|
| 314 | WRITE (nout,'(A,I3,A)') ' Factor =',ifac,', not catered for' |
---|
| 315 | CASE (1:) |
---|
| 316 | WRITE (nout,'(A,I3,A)') ' Factor =',ifac,', only catered for if la*ifac=n' |
---|
| 317 | END SELECT |
---|
| 318 | |
---|
| 319 | RETURN |
---|
| 320 | END SUBROUTINE fft991cy |
---|
| 321 | |
---|
| 322 | SUBROUTINE qpassm(a,b,c,d,trigs,inc1,inc2,inc3,inc4,lot,n,ifac,la,ierr) |
---|
| 323 | |
---|
| 324 | ! Description: |
---|
| 325 | ! |
---|
| 326 | ! Performs one pass through data as part of |
---|
| 327 | ! multiple real fft (fourier analysis) routine. |
---|
| 328 | ! |
---|
| 329 | ! Method: |
---|
| 330 | ! |
---|
| 331 | ! a is first real input vector |
---|
| 332 | ! equivalence b(1) with a(ifac*la*inc1+1) |
---|
| 333 | ! c is first real output vector |
---|
| 334 | ! equivalence d(1) with c(la*inc2+1) |
---|
| 335 | ! trigs is a precalculated list of sines & cosines |
---|
| 336 | ! inc1 is the addressing increment for a |
---|
| 337 | ! inc2 is the addressing increment for c |
---|
| 338 | ! inc3 is the increment between input vectors a |
---|
| 339 | ! inc4 is the increment between output vectors c |
---|
| 340 | ! lot is the number of vectors |
---|
| 341 | ! n is the length of the vectors |
---|
| 342 | ! ifac is the current factor of n |
---|
| 343 | ! la = n/(product of factors used so far) |
---|
| 344 | ! ierr is an error indicator: |
---|
| 345 | ! 0 - pass completed without error |
---|
| 346 | ! 1 - lot greater than nfft |
---|
| 347 | ! 2 - ifac not catered for |
---|
| 348 | ! 3 - ifac only catered for if la=n/ifac |
---|
| 349 | ! |
---|
| 350 | |
---|
[1320] | 351 | USE kinds |
---|
[1] | 352 | |
---|
[1320] | 353 | IMPLICIT NONE |
---|
| 354 | |
---|
[1] | 355 | ! Scalar arguments |
---|
[1320] | 356 | INTEGER(iwp) :: ierr !: |
---|
| 357 | INTEGER(iwp) :: ifac !: |
---|
| 358 | INTEGER(iwp) :: inc1 !: |
---|
| 359 | INTEGER(iwp) :: inc2 !: |
---|
| 360 | INTEGER(iwp) :: inc3 !: |
---|
| 361 | INTEGER(iwp) :: inc4 !: |
---|
| 362 | INTEGER(iwp) :: la !: |
---|
| 363 | INTEGER(iwp) :: lot !: |
---|
| 364 | INTEGER(iwp) :: n !: |
---|
[1] | 365 | |
---|
| 366 | ! Array arguments |
---|
| 367 | ! REAL :: a(n),b(n),c(n),d(n),trigs(n) |
---|
[1320] | 368 | REAL(wp) :: a(*) !: |
---|
| 369 | REAL(wp) :: b(*) !: |
---|
| 370 | REAL(wp) :: c(*) !: |
---|
| 371 | REAL(wp) :: d(*) !: |
---|
| 372 | REAL(wp) :: trigs(*) !: |
---|
| 373 | |
---|
[1] | 374 | ! Local scalars: |
---|
[1320] | 375 | REAL(wp) :: a0 !: |
---|
| 376 | REAL(wp) :: a1 !: |
---|
| 377 | REAL(wp) :: a10 !: |
---|
| 378 | REAL(wp) :: a11 !: |
---|
| 379 | REAL(wp) :: a2 !: |
---|
| 380 | REAL(wp) :: a20 !: |
---|
| 381 | REAL(wp) :: a21 !: |
---|
| 382 | REAL(wp) :: a3 !: |
---|
| 383 | REAL(wp) :: a4 !: |
---|
| 384 | REAL(wp) :: a5 !: |
---|
| 385 | REAL(wp) :: a6 !: |
---|
| 386 | REAL(wp) :: b0 !: |
---|
| 387 | REAL(wp) :: b1 !: |
---|
| 388 | REAL(wp) :: b10 !: |
---|
| 389 | REAL(wp) :: b11 !: |
---|
| 390 | REAL(wp) :: b2 !: |
---|
| 391 | REAL(wp) :: b20 !: |
---|
| 392 | REAL(wp) :: b21 !: |
---|
| 393 | REAL(wp) :: b3 !: |
---|
| 394 | REAL(wp) :: b4 !: |
---|
| 395 | REAL(wp) :: b5 !: |
---|
| 396 | REAL(wp) :: b6 !: |
---|
| 397 | REAL(wp) :: c1 !: |
---|
| 398 | REAL(wp) :: c2 !: |
---|
| 399 | REAL(wp) :: c3 !: |
---|
| 400 | REAL(wp) :: c4 !: |
---|
| 401 | REAL(wp) :: c5 !: |
---|
| 402 | REAL(wp) :: qrt5 !: |
---|
| 403 | REAL(wp) :: s1 !: |
---|
| 404 | REAL(wp) :: s2 !: |
---|
| 405 | REAL(wp) :: s3 !: |
---|
| 406 | REAL(wp) :: s4 !: |
---|
| 407 | REAL(wp) :: s5 !: |
---|
| 408 | REAL(wp) :: sin36 !: |
---|
| 409 | REAL(wp) :: sin45 !: |
---|
| 410 | REAL(wp) :: sin60 !: |
---|
| 411 | REAL(wp) :: sin72 !: |
---|
| 412 | REAL(wp) :: z !: |
---|
| 413 | REAL(wp) :: zqrt5 !: |
---|
| 414 | REAL(wp) :: zsin36 !: |
---|
| 415 | REAL(wp) :: zsin45 !: |
---|
| 416 | REAL(wp) :: zsin60 !: |
---|
| 417 | REAL(wp) :: zsin72 !: |
---|
[1] | 418 | |
---|
[1320] | 419 | INTEGER(iwp) :: i !: |
---|
| 420 | INTEGER(iwp) :: ia !: |
---|
| 421 | INTEGER(iwp) :: ib !: |
---|
| 422 | INTEGER(iwp) :: ibad !: |
---|
| 423 | INTEGER(iwp) :: ibase !: |
---|
| 424 | INTEGER(iwp) :: ic !: |
---|
| 425 | INTEGER(iwp) :: id !: |
---|
| 426 | INTEGER(iwp) :: ie !: |
---|
| 427 | INTEGER(iwp) :: if !: |
---|
| 428 | INTEGER(iwp) :: ig !: |
---|
| 429 | INTEGER(iwp) :: igo !: |
---|
| 430 | INTEGER(iwp) :: ih !: |
---|
| 431 | INTEGER(iwp) :: iink !: |
---|
| 432 | INTEGER(iwp) :: ijk !: |
---|
| 433 | INTEGER(iwp) :: ijump !: |
---|
| 434 | INTEGER(iwp) :: j !: |
---|
| 435 | INTEGER(iwp) :: ja !: |
---|
| 436 | INTEGER(iwp) :: jb !: |
---|
| 437 | INTEGER(iwp) :: jbase !: |
---|
| 438 | INTEGER(iwp) :: jc !: |
---|
| 439 | INTEGER(iwp) :: jd !: |
---|
| 440 | INTEGER(iwp) :: je !: |
---|
| 441 | INTEGER(iwp) :: jf !: |
---|
| 442 | INTEGER(iwp) :: jink !: |
---|
| 443 | INTEGER(iwp) :: k !: |
---|
| 444 | INTEGER(iwp) :: kb !: |
---|
| 445 | INTEGER(iwp) :: kc !: |
---|
| 446 | INTEGER(iwp) :: kd !: |
---|
| 447 | INTEGER(iwp) :: ke !: |
---|
| 448 | INTEGER(iwp) :: kf !: |
---|
| 449 | INTEGER(iwp) :: kstop !: |
---|
| 450 | INTEGER(iwp) :: l !: |
---|
| 451 | INTEGER(iwp) :: m !: |
---|
| 452 | |
---|
[1] | 453 | ! Intrinsic functions |
---|
[1320] | 454 | ! INTRINSIC REAL, SQRT |
---|
[1] | 455 | |
---|
| 456 | ! Data statements |
---|
[1320] | 457 | DATA sin36/0.587785252292473_wp/, sin72/0.951056516295154_wp/, & |
---|
| 458 | & qrt5/0.559016994374947_wp/, sin60/0.866025403784437_wp/ |
---|
[1] | 459 | |
---|
| 460 | |
---|
| 461 | ! Executable statements |
---|
| 462 | |
---|
| 463 | m = n/ifac |
---|
| 464 | iink = la*inc1 |
---|
| 465 | jink = la*inc2 |
---|
| 466 | ijump = (ifac-1)*iink |
---|
| 467 | kstop = (n-ifac)/(2*ifac) |
---|
| 468 | |
---|
| 469 | ibad = 1 |
---|
| 470 | IF (lot>nfft) GO TO 180 |
---|
| 471 | ibase = 0 |
---|
| 472 | jbase = 0 |
---|
| 473 | igo = ifac - 1 |
---|
| 474 | IF (igo==7) igo = 6 |
---|
| 475 | ibad = 2 |
---|
| 476 | IF (igo<1 .OR. igo>6) GO TO 180 |
---|
| 477 | GO TO (10,40,70,100,130,160) igo |
---|
| 478 | |
---|
| 479 | ! Coding for factor 2 |
---|
| 480 | |
---|
| 481 | 10 CONTINUE |
---|
| 482 | ia = 1 |
---|
| 483 | ib = ia + iink |
---|
| 484 | ja = 1 |
---|
| 485 | jb = ja + (2*m-la)*inc2 |
---|
| 486 | |
---|
| 487 | IF (la==m) GO TO 30 |
---|
| 488 | |
---|
| 489 | DO l = 1, la |
---|
| 490 | i = ibase |
---|
| 491 | j = jbase |
---|
| 492 | !DIR$ IVDEP |
---|
| 493 | !CDIR NODEP |
---|
| 494 | !OCL NOVREC |
---|
| 495 | DO ijk = 1, lot |
---|
| 496 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 497 | c(jb+j) = a(ia+i) - a(ib+i) |
---|
| 498 | i = i + inc3 |
---|
| 499 | j = j + inc4 |
---|
| 500 | END DO |
---|
| 501 | ibase = ibase + inc1 |
---|
| 502 | jbase = jbase + inc2 |
---|
| 503 | END DO |
---|
| 504 | ja = ja + jink |
---|
| 505 | jink = 2*jink |
---|
| 506 | jb = jb - jink |
---|
| 507 | ibase = ibase + ijump |
---|
| 508 | ijump = 2*ijump + iink |
---|
| 509 | IF (ja==jb) GO TO 20 |
---|
| 510 | DO k = la, kstop, la |
---|
| 511 | kb = k + k |
---|
| 512 | c1 = trigs(kb+1) |
---|
| 513 | s1 = trigs(kb+2) |
---|
| 514 | jbase = 0 |
---|
| 515 | DO l = 1, la |
---|
| 516 | i = ibase |
---|
| 517 | j = jbase |
---|
| 518 | !DIR$ IVDEP |
---|
| 519 | !CDIR NODEP |
---|
| 520 | !OCL NOVREC |
---|
| 521 | DO ijk = 1, lot |
---|
| 522 | c(ja+j) = a(ia+i) + (c1*a(ib+i)+s1*b(ib+i)) |
---|
| 523 | c(jb+j) = a(ia+i) - (c1*a(ib+i)+s1*b(ib+i)) |
---|
| 524 | d(ja+j) = (c1*b(ib+i)-s1*a(ib+i)) + b(ia+i) |
---|
| 525 | d(jb+j) = (c1*b(ib+i)-s1*a(ib+i)) - b(ia+i) |
---|
| 526 | i = i + inc3 |
---|
| 527 | j = j + inc4 |
---|
| 528 | END DO |
---|
| 529 | ibase = ibase + inc1 |
---|
| 530 | jbase = jbase + inc2 |
---|
| 531 | END DO |
---|
| 532 | ibase = ibase + ijump |
---|
| 533 | ja = ja + jink |
---|
| 534 | jb = jb - jink |
---|
| 535 | END DO |
---|
| 536 | IF (ja>jb) GO TO 170 |
---|
| 537 | 20 CONTINUE |
---|
| 538 | jbase = 0 |
---|
| 539 | DO l = 1, la |
---|
| 540 | i = ibase |
---|
| 541 | j = jbase |
---|
| 542 | !DIR$ IVDEP |
---|
| 543 | !CDIR NODEP |
---|
| 544 | !OCL NOVREC |
---|
| 545 | DO ijk = 1, lot |
---|
| 546 | c(ja+j) = a(ia+i) |
---|
| 547 | d(ja+j) = -a(ib+i) |
---|
| 548 | i = i + inc3 |
---|
| 549 | j = j + inc4 |
---|
| 550 | END DO |
---|
| 551 | ibase = ibase + inc1 |
---|
| 552 | jbase = jbase + inc2 |
---|
| 553 | END DO |
---|
| 554 | |
---|
| 555 | GO TO 170 |
---|
| 556 | 30 CONTINUE |
---|
[1342] | 557 | z = 1.0_wp/REAL(n,KIND=wp) |
---|
[1] | 558 | DO l = 1, la |
---|
| 559 | i = ibase |
---|
| 560 | j = jbase |
---|
| 561 | !DIR$ IVDEP |
---|
| 562 | !CDIR NODEP |
---|
| 563 | !OCL NOVREC |
---|
| 564 | DO ijk = 1, lot |
---|
| 565 | c(ja+j) = z*(a(ia+i)+a(ib+i)) |
---|
| 566 | c(jb+j) = z*(a(ia+i)-a(ib+i)) |
---|
| 567 | i = i + inc3 |
---|
| 568 | j = j + inc4 |
---|
| 569 | END DO |
---|
| 570 | ibase = ibase + inc1 |
---|
| 571 | jbase = jbase + inc2 |
---|
| 572 | END DO |
---|
| 573 | GO TO 170 |
---|
| 574 | |
---|
| 575 | ! Coding for factor 3 |
---|
| 576 | |
---|
| 577 | 40 CONTINUE |
---|
| 578 | ia = 1 |
---|
| 579 | ib = ia + iink |
---|
| 580 | ic = ib + iink |
---|
| 581 | ja = 1 |
---|
| 582 | jb = ja + (2*m-la)*inc2 |
---|
| 583 | jc = jb |
---|
| 584 | |
---|
| 585 | IF (la==m) GO TO 60 |
---|
| 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(ib+i)+a(ic+i)) |
---|
[1342] | 595 | c(jb+j) = a(ia+i) - 0.5_wp*(a(ib+i)+a(ic+i)) |
---|
[1] | 596 | d(jb+j) = sin60*(a(ic+i)-a(ib+i)) |
---|
| 597 | i = i + inc3 |
---|
| 598 | j = j + inc4 |
---|
| 599 | END DO |
---|
| 600 | ibase = ibase + inc1 |
---|
| 601 | jbase = jbase + inc2 |
---|
| 602 | END DO |
---|
| 603 | ja = ja + jink |
---|
| 604 | jink = 2*jink |
---|
| 605 | jb = jb + jink |
---|
| 606 | jc = jc - jink |
---|
| 607 | ibase = ibase + ijump |
---|
| 608 | ijump = 2*ijump + iink |
---|
| 609 | IF (ja==jc) GO TO 50 |
---|
| 610 | DO k = la, kstop, la |
---|
| 611 | kb = k + k |
---|
| 612 | kc = kb + kb |
---|
| 613 | c1 = trigs(kb+1) |
---|
| 614 | s1 = trigs(kb+2) |
---|
| 615 | c2 = trigs(kc+1) |
---|
| 616 | s2 = trigs(kc+2) |
---|
| 617 | jbase = 0 |
---|
| 618 | DO l = 1, la |
---|
| 619 | i = ibase |
---|
| 620 | j = jbase |
---|
| 621 | !DIR$ IVDEP |
---|
| 622 | !CDIR NODEP |
---|
| 623 | !OCL NOVREC |
---|
| 624 | DO ijk = 1, lot |
---|
| 625 | a1 = (c1*a(ib+i)+s1*b(ib+i)) + (c2*a(ic+i)+s2*b(ic+i)) |
---|
| 626 | b1 = (c1*b(ib+i)-s1*a(ib+i)) + (c2*b(ic+i)-s2*a(ic+i)) |
---|
[1342] | 627 | a2 = a(ia+i) - 0.5_wp*a1 |
---|
| 628 | b2 = b(ia+i) - 0.5_wp*b1 |
---|
[1] | 629 | a3 = sin60*((c1*a(ib+i)+s1*b(ib+i))-(c2*a(ic+i)+s2*b(ic+i))) |
---|
| 630 | b3 = sin60*((c1*b(ib+i)-s1*a(ib+i))-(c2*b(ic+i)-s2*a(ic+i))) |
---|
| 631 | c(ja+j) = a(ia+i) + a1 |
---|
| 632 | d(ja+j) = b(ia+i) + b1 |
---|
| 633 | c(jb+j) = a2 + b3 |
---|
| 634 | d(jb+j) = b2 - a3 |
---|
| 635 | c(jc+j) = a2 - b3 |
---|
| 636 | d(jc+j) = -(b2+a3) |
---|
| 637 | i = i + inc3 |
---|
| 638 | j = j + inc4 |
---|
| 639 | END DO |
---|
| 640 | ibase = ibase + inc1 |
---|
| 641 | jbase = jbase + inc2 |
---|
| 642 | END DO |
---|
| 643 | ibase = ibase + ijump |
---|
| 644 | ja = ja + jink |
---|
| 645 | jb = jb + jink |
---|
| 646 | jc = jc - jink |
---|
| 647 | END DO |
---|
| 648 | IF (ja>jc) GO TO 170 |
---|
| 649 | 50 CONTINUE |
---|
| 650 | jbase = 0 |
---|
| 651 | DO l = 1, la |
---|
| 652 | i = ibase |
---|
| 653 | j = jbase |
---|
| 654 | !DIR$ IVDEP |
---|
| 655 | !CDIR NODEP |
---|
| 656 | !OCL NOVREC |
---|
| 657 | DO ijk = 1, lot |
---|
[1342] | 658 | c(ja+j) = a(ia+i) + 0.5_wp*(a(ib+i)-a(ic+i)) |
---|
[1] | 659 | d(ja+j) = -sin60*(a(ib+i)+a(ic+i)) |
---|
| 660 | c(jb+j) = a(ia+i) - (a(ib+i)-a(ic+i)) |
---|
| 661 | i = i + inc3 |
---|
| 662 | j = j + inc4 |
---|
| 663 | END DO |
---|
| 664 | ibase = ibase + inc1 |
---|
| 665 | jbase = jbase + inc2 |
---|
| 666 | END DO |
---|
| 667 | |
---|
| 668 | GO TO 170 |
---|
| 669 | 60 CONTINUE |
---|
[1342] | 670 | z = 1.0_wp/REAL(n,KIND=wp) |
---|
[1] | 671 | zsin60 = z*sin60 |
---|
| 672 | DO l = 1, la |
---|
| 673 | i = ibase |
---|
| 674 | j = jbase |
---|
| 675 | !DIR$ IVDEP |
---|
| 676 | !CDIR NODEP |
---|
| 677 | !OCL NOVREC |
---|
| 678 | DO ijk = 1, lot |
---|
| 679 | c(ja+j) = z*(a(ia+i)+(a(ib+i)+a(ic+i))) |
---|
[1342] | 680 | c(jb+j) = z*(a(ia+i)-0.5_wp*(a(ib+i)+a(ic+i))) |
---|
[1] | 681 | d(jb+j) = zsin60*(a(ic+i)-a(ib+i)) |
---|
| 682 | i = i + inc3 |
---|
| 683 | j = j + inc4 |
---|
| 684 | END DO |
---|
| 685 | ibase = ibase + inc1 |
---|
| 686 | jbase = jbase + inc2 |
---|
| 687 | END DO |
---|
| 688 | GO TO 170 |
---|
| 689 | |
---|
| 690 | ! Coding for factor 4 |
---|
| 691 | |
---|
| 692 | 70 CONTINUE |
---|
| 693 | ia = 1 |
---|
| 694 | ib = ia + iink |
---|
| 695 | ic = ib + iink |
---|
| 696 | id = ic + iink |
---|
| 697 | ja = 1 |
---|
| 698 | jb = ja + (2*m-la)*inc2 |
---|
| 699 | jc = jb + 2*m*inc2 |
---|
| 700 | jd = jb |
---|
| 701 | |
---|
| 702 | IF (la==m) GO TO 90 |
---|
| 703 | |
---|
| 704 | DO l = 1, la |
---|
| 705 | i = ibase |
---|
| 706 | j = jbase |
---|
| 707 | !DIR$ IVDEP |
---|
| 708 | !CDIR NODEP |
---|
| 709 | !OCL NOVREC |
---|
| 710 | DO ijk = 1, lot |
---|
| 711 | c(ja+j) = (a(ia+i)+a(ic+i)) + (a(ib+i)+a(id+i)) |
---|
| 712 | c(jc+j) = (a(ia+i)+a(ic+i)) - (a(ib+i)+a(id+i)) |
---|
| 713 | c(jb+j) = a(ia+i) - a(ic+i) |
---|
| 714 | d(jb+j) = a(id+i) - a(ib+i) |
---|
| 715 | i = i + inc3 |
---|
| 716 | j = j + inc4 |
---|
| 717 | END DO |
---|
| 718 | ibase = ibase + inc1 |
---|
| 719 | jbase = jbase + inc2 |
---|
| 720 | END DO |
---|
| 721 | ja = ja + jink |
---|
| 722 | jink = 2*jink |
---|
| 723 | jb = jb + jink |
---|
| 724 | jc = jc - jink |
---|
| 725 | jd = jd - jink |
---|
| 726 | ibase = ibase + ijump |
---|
| 727 | ijump = 2*ijump + iink |
---|
| 728 | IF (jb==jc) GO TO 80 |
---|
| 729 | DO k = la, kstop, la |
---|
| 730 | kb = k + k |
---|
| 731 | kc = kb + kb |
---|
| 732 | kd = kc + kb |
---|
| 733 | c1 = trigs(kb+1) |
---|
| 734 | s1 = trigs(kb+2) |
---|
| 735 | c2 = trigs(kc+1) |
---|
| 736 | s2 = trigs(kc+2) |
---|
| 737 | c3 = trigs(kd+1) |
---|
| 738 | s3 = trigs(kd+2) |
---|
| 739 | jbase = 0 |
---|
| 740 | DO l = 1, la |
---|
| 741 | i = ibase |
---|
| 742 | j = jbase |
---|
| 743 | !DIR$ IVDEP |
---|
| 744 | !CDIR NODEP |
---|
| 745 | !OCL NOVREC |
---|
| 746 | DO ijk = 1, lot |
---|
| 747 | a0 = a(ia+i) + (c2*a(ic+i)+s2*b(ic+i)) |
---|
| 748 | a2 = a(ia+i) - (c2*a(ic+i)+s2*b(ic+i)) |
---|
| 749 | a1 = (c1*a(ib+i)+s1*b(ib+i)) + (c3*a(id+i)+s3*b(id+i)) |
---|
| 750 | a3 = (c1*a(ib+i)+s1*b(ib+i)) - (c3*a(id+i)+s3*b(id+i)) |
---|
| 751 | b0 = b(ia+i) + (c2*b(ic+i)-s2*a(ic+i)) |
---|
| 752 | b2 = b(ia+i) - (c2*b(ic+i)-s2*a(ic+i)) |
---|
| 753 | b1 = (c1*b(ib+i)-s1*a(ib+i)) + (c3*b(id+i)-s3*a(id+i)) |
---|
| 754 | b3 = (c1*b(ib+i)-s1*a(ib+i)) - (c3*b(id+i)-s3*a(id+i)) |
---|
| 755 | c(ja+j) = a0 + a1 |
---|
| 756 | c(jc+j) = a0 - a1 |
---|
| 757 | d(ja+j) = b0 + b1 |
---|
| 758 | d(jc+j) = b1 - b0 |
---|
| 759 | c(jb+j) = a2 + b3 |
---|
| 760 | c(jd+j) = a2 - b3 |
---|
| 761 | d(jb+j) = b2 - a3 |
---|
| 762 | d(jd+j) = -(b2+a3) |
---|
| 763 | i = i + inc3 |
---|
| 764 | j = j + inc4 |
---|
| 765 | END DO |
---|
| 766 | ibase = ibase + inc1 |
---|
| 767 | jbase = jbase + inc2 |
---|
| 768 | END DO |
---|
| 769 | ibase = ibase + ijump |
---|
| 770 | ja = ja + jink |
---|
| 771 | jb = jb + jink |
---|
| 772 | jc = jc - jink |
---|
| 773 | jd = jd - jink |
---|
| 774 | END DO |
---|
| 775 | IF (jb>jc) GO TO 170 |
---|
| 776 | 80 CONTINUE |
---|
[1320] | 777 | sin45 = SQRT(0.5_wp) |
---|
[1] | 778 | jbase = 0 |
---|
| 779 | DO l = 1, la |
---|
| 780 | i = ibase |
---|
| 781 | j = jbase |
---|
| 782 | !DIR$ IVDEP |
---|
| 783 | !CDIR NODEP |
---|
| 784 | !OCL NOVREC |
---|
| 785 | DO ijk = 1, lot |
---|
| 786 | c(ja+j) = a(ia+i) + sin45*(a(ib+i)-a(id+i)) |
---|
| 787 | c(jb+j) = a(ia+i) - sin45*(a(ib+i)-a(id+i)) |
---|
| 788 | d(ja+j) = -a(ic+i) - sin45*(a(ib+i)+a(id+i)) |
---|
| 789 | d(jb+j) = a(ic+i) - sin45*(a(ib+i)+a(id+i)) |
---|
| 790 | i = i + inc3 |
---|
| 791 | j = j + inc4 |
---|
| 792 | END DO |
---|
| 793 | ibase = ibase + inc1 |
---|
| 794 | jbase = jbase + inc2 |
---|
| 795 | END DO |
---|
| 796 | |
---|
| 797 | GO TO 170 |
---|
| 798 | 90 CONTINUE |
---|
[1342] | 799 | z = 1.0_wp/REAL(n,KIND=wp) |
---|
[1] | 800 | DO l = 1, la |
---|
| 801 | i = ibase |
---|
| 802 | j = jbase |
---|
| 803 | !DIR$ IVDEP |
---|
| 804 | !CDIR NODEP |
---|
| 805 | !OCL NOVREC |
---|
| 806 | DO ijk = 1, lot |
---|
| 807 | c(ja+j) = z*((a(ia+i)+a(ic+i))+(a(ib+i)+a(id+i))) |
---|
| 808 | c(jc+j) = z*((a(ia+i)+a(ic+i))-(a(ib+i)+a(id+i))) |
---|
| 809 | c(jb+j) = z*(a(ia+i)-a(ic+i)) |
---|
| 810 | d(jb+j) = z*(a(id+i)-a(ib+i)) |
---|
| 811 | i = i + inc3 |
---|
| 812 | j = j + inc4 |
---|
| 813 | END DO |
---|
| 814 | ibase = ibase + inc1 |
---|
| 815 | jbase = jbase + inc2 |
---|
| 816 | END DO |
---|
| 817 | GO TO 170 |
---|
| 818 | |
---|
| 819 | ! Coding for factor 5 |
---|
| 820 | |
---|
| 821 | 100 CONTINUE |
---|
| 822 | ia = 1 |
---|
| 823 | ib = ia + iink |
---|
| 824 | ic = ib + iink |
---|
| 825 | id = ic + iink |
---|
| 826 | ie = id + iink |
---|
| 827 | ja = 1 |
---|
| 828 | jb = ja + (2*m-la)*inc2 |
---|
| 829 | jc = jb + 2*m*inc2 |
---|
| 830 | jd = jc |
---|
| 831 | je = jb |
---|
| 832 | |
---|
| 833 | IF (la==m) GO TO 120 |
---|
| 834 | |
---|
| 835 | DO l = 1, la |
---|
| 836 | i = ibase |
---|
| 837 | j = jbase |
---|
| 838 | !DIR$ IVDEP |
---|
| 839 | !CDIR NODEP |
---|
| 840 | !OCL NOVREC |
---|
| 841 | DO ijk = 1, lot |
---|
| 842 | a1 = a(ib+i) + a(ie+i) |
---|
| 843 | a3 = a(ib+i) - a(ie+i) |
---|
| 844 | a2 = a(ic+i) + a(id+i) |
---|
| 845 | a4 = a(ic+i) - a(id+i) |
---|
[1342] | 846 | a5 = a(ia+i) - 0.25_wp*(a1+a2) |
---|
[1] | 847 | a6 = qrt5*(a1-a2) |
---|
| 848 | c(ja+j) = a(ia+i) + (a1+a2) |
---|
| 849 | c(jb+j) = a5 + a6 |
---|
| 850 | c(jc+j) = a5 - a6 |
---|
| 851 | d(jb+j) = -sin72*a3 - sin36*a4 |
---|
| 852 | d(jc+j) = -sin36*a3 + sin72*a4 |
---|
| 853 | i = i + inc3 |
---|
| 854 | j = j + inc4 |
---|
| 855 | END DO |
---|
| 856 | ibase = ibase + inc1 |
---|
| 857 | jbase = jbase + inc2 |
---|
| 858 | END DO |
---|
| 859 | ja = ja + jink |
---|
| 860 | jink = 2*jink |
---|
| 861 | jb = jb + jink |
---|
| 862 | jc = jc + jink |
---|
| 863 | jd = jd - jink |
---|
| 864 | je = je - jink |
---|
| 865 | ibase = ibase + ijump |
---|
| 866 | ijump = 2*ijump + iink |
---|
| 867 | IF (jb==jd) GO TO 110 |
---|
| 868 | DO k = la, kstop, la |
---|
| 869 | kb = k + k |
---|
| 870 | kc = kb + kb |
---|
| 871 | kd = kc + kb |
---|
| 872 | ke = kd + kb |
---|
| 873 | c1 = trigs(kb+1) |
---|
| 874 | s1 = trigs(kb+2) |
---|
| 875 | c2 = trigs(kc+1) |
---|
| 876 | s2 = trigs(kc+2) |
---|
| 877 | c3 = trigs(kd+1) |
---|
| 878 | s3 = trigs(kd+2) |
---|
| 879 | c4 = trigs(ke+1) |
---|
| 880 | s4 = trigs(ke+2) |
---|
| 881 | jbase = 0 |
---|
| 882 | DO l = 1, la |
---|
| 883 | i = ibase |
---|
| 884 | j = jbase |
---|
| 885 | !DIR$ IVDEP |
---|
| 886 | !CDIR NODEP |
---|
| 887 | !OCL NOVREC |
---|
| 888 | DO ijk = 1, lot |
---|
| 889 | a1 = (c1*a(ib+i)+s1*b(ib+i)) + (c4*a(ie+i)+s4*b(ie+i)) |
---|
| 890 | a3 = (c1*a(ib+i)+s1*b(ib+i)) - (c4*a(ie+i)+s4*b(ie+i)) |
---|
| 891 | a2 = (c2*a(ic+i)+s2*b(ic+i)) + (c3*a(id+i)+s3*b(id+i)) |
---|
| 892 | a4 = (c2*a(ic+i)+s2*b(ic+i)) - (c3*a(id+i)+s3*b(id+i)) |
---|
| 893 | b1 = (c1*b(ib+i)-s1*a(ib+i)) + (c4*b(ie+i)-s4*a(ie+i)) |
---|
| 894 | b3 = (c1*b(ib+i)-s1*a(ib+i)) - (c4*b(ie+i)-s4*a(ie+i)) |
---|
| 895 | b2 = (c2*b(ic+i)-s2*a(ic+i)) + (c3*b(id+i)-s3*a(id+i)) |
---|
| 896 | b4 = (c2*b(ic+i)-s2*a(ic+i)) - (c3*b(id+i)-s3*a(id+i)) |
---|
[1342] | 897 | a5 = a(ia+i) - 0.25_wp*(a1+a2) |
---|
[1] | 898 | a6 = qrt5*(a1-a2) |
---|
[1342] | 899 | b5 = b(ia+i) - 0.25_wp*(b1+b2) |
---|
[1] | 900 | b6 = qrt5*(b1-b2) |
---|
| 901 | a10 = a5 + a6 |
---|
| 902 | a20 = a5 - a6 |
---|
| 903 | b10 = b5 + b6 |
---|
| 904 | b20 = b5 - b6 |
---|
| 905 | a11 = sin72*b3 + sin36*b4 |
---|
| 906 | a21 = sin36*b3 - sin72*b4 |
---|
| 907 | b11 = sin72*a3 + sin36*a4 |
---|
| 908 | b21 = sin36*a3 - sin72*a4 |
---|
| 909 | c(ja+j) = a(ia+i) + (a1+a2) |
---|
| 910 | c(jb+j) = a10 + a11 |
---|
| 911 | c(je+j) = a10 - a11 |
---|
| 912 | c(jc+j) = a20 + a21 |
---|
| 913 | c(jd+j) = a20 - a21 |
---|
| 914 | d(ja+j) = b(ia+i) + (b1+b2) |
---|
| 915 | d(jb+j) = b10 - b11 |
---|
| 916 | d(je+j) = -(b10+b11) |
---|
| 917 | d(jc+j) = b20 - b21 |
---|
| 918 | d(jd+j) = -(b20+b21) |
---|
| 919 | i = i + inc3 |
---|
| 920 | j = j + inc4 |
---|
| 921 | END DO |
---|
| 922 | ibase = ibase + inc1 |
---|
| 923 | jbase = jbase + inc2 |
---|
| 924 | END DO |
---|
| 925 | ibase = ibase + ijump |
---|
| 926 | ja = ja + jink |
---|
| 927 | jb = jb + jink |
---|
| 928 | jc = jc + jink |
---|
| 929 | jd = jd - jink |
---|
| 930 | je = je - jink |
---|
| 931 | END DO |
---|
| 932 | IF (jb>jd) GO TO 170 |
---|
| 933 | 110 CONTINUE |
---|
| 934 | jbase = 0 |
---|
| 935 | DO l = 1, la |
---|
| 936 | i = ibase |
---|
| 937 | j = jbase |
---|
| 938 | !DIR$ IVDEP |
---|
| 939 | !CDIR NODEP |
---|
| 940 | !OCL NOVREC |
---|
| 941 | DO ijk = 1, lot |
---|
| 942 | a1 = a(ib+i) + a(ie+i) |
---|
| 943 | a3 = a(ib+i) - a(ie+i) |
---|
| 944 | a2 = a(ic+i) + a(id+i) |
---|
| 945 | a4 = a(ic+i) - a(id+i) |
---|
[1342] | 946 | a5 = a(ia+i) + 0.25_wp*(a3-a4) |
---|
[1] | 947 | a6 = qrt5*(a3+a4) |
---|
| 948 | c(ja+j) = a5 + a6 |
---|
| 949 | c(jb+j) = a5 - a6 |
---|
| 950 | c(jc+j) = a(ia+i) - (a3-a4) |
---|
| 951 | d(ja+j) = -sin36*a1 - sin72*a2 |
---|
| 952 | d(jb+j) = -sin72*a1 + sin36*a2 |
---|
| 953 | i = i + inc3 |
---|
| 954 | j = j + inc4 |
---|
| 955 | END DO |
---|
| 956 | ibase = ibase + inc1 |
---|
| 957 | jbase = jbase + inc2 |
---|
| 958 | END DO |
---|
| 959 | |
---|
| 960 | GO TO 170 |
---|
| 961 | 120 CONTINUE |
---|
[1342] | 962 | z = 1.0_wp/REAL(n,KIND=wp) |
---|
[1] | 963 | zqrt5 = z*qrt5 |
---|
| 964 | zsin36 = z*sin36 |
---|
| 965 | zsin72 = z*sin72 |
---|
| 966 | DO l = 1, la |
---|
| 967 | i = ibase |
---|
| 968 | j = jbase |
---|
| 969 | !DIR$ IVDEP |
---|
| 970 | !CDIR NODEP |
---|
| 971 | !OCL NOVREC |
---|
| 972 | DO ijk = 1, lot |
---|
| 973 | a1 = a(ib+i) + a(ie+i) |
---|
| 974 | a3 = a(ib+i) - a(ie+i) |
---|
| 975 | a2 = a(ic+i) + a(id+i) |
---|
| 976 | a4 = a(ic+i) - a(id+i) |
---|
[1342] | 977 | a5 = z*(a(ia+i)-0.25_wp*(a1+a2)) |
---|
[1] | 978 | a6 = zqrt5*(a1-a2) |
---|
| 979 | c(ja+j) = z*(a(ia+i)+(a1+a2)) |
---|
| 980 | c(jb+j) = a5 + a6 |
---|
| 981 | c(jc+j) = a5 - a6 |
---|
| 982 | d(jb+j) = -zsin72*a3 - zsin36*a4 |
---|
| 983 | d(jc+j) = -zsin36*a3 + zsin72*a4 |
---|
| 984 | i = i + inc3 |
---|
| 985 | j = j + inc4 |
---|
| 986 | END DO |
---|
| 987 | ibase = ibase + inc1 |
---|
| 988 | jbase = jbase + inc2 |
---|
| 989 | END DO |
---|
| 990 | GO TO 170 |
---|
| 991 | |
---|
| 992 | ! Coding for factor 6 |
---|
| 993 | |
---|
| 994 | 130 CONTINUE |
---|
| 995 | ia = 1 |
---|
| 996 | ib = ia + iink |
---|
| 997 | ic = ib + iink |
---|
| 998 | id = ic + iink |
---|
| 999 | ie = id + iink |
---|
| 1000 | if = ie + iink |
---|
| 1001 | ja = 1 |
---|
| 1002 | jb = ja + (2*m-la)*inc2 |
---|
| 1003 | jc = jb + 2*m*inc2 |
---|
| 1004 | jd = jc + 2*m*inc2 |
---|
| 1005 | je = jc |
---|
| 1006 | jf = jb |
---|
| 1007 | |
---|
| 1008 | IF (la==m) GO TO 150 |
---|
| 1009 | |
---|
| 1010 | DO l = 1, la |
---|
| 1011 | i = ibase |
---|
| 1012 | j = jbase |
---|
| 1013 | !DIR$ IVDEP |
---|
| 1014 | !CDIR NODEP |
---|
| 1015 | !OCL NOVREC |
---|
| 1016 | DO ijk = 1, lot |
---|
| 1017 | a11 = (a(ic+i)+a(if+i)) + (a(ib+i)+a(ie+i)) |
---|
| 1018 | c(ja+j) = (a(ia+i)+a(id+i)) + a11 |
---|
[1342] | 1019 | c(jc+j) = (a(ia+i)+a(id+i)-0.5_wp*a11) |
---|
[1] | 1020 | d(jc+j) = sin60*((a(ic+i)+a(if+i))-(a(ib+i)+a(ie+i))) |
---|
| 1021 | a11 = (a(ic+i)-a(if+i)) + (a(ie+i)-a(ib+i)) |
---|
[1342] | 1022 | c(jb+j) = (a(ia+i)-a(id+i)) - 0.5_wp*a11 |
---|
[1] | 1023 | d(jb+j) = sin60*((a(ie+i)-a(ib+i))-(a(ic+i)-a(if+i))) |
---|
| 1024 | c(jd+j) = (a(ia+i)-a(id+i)) + a11 |
---|
| 1025 | i = i + inc3 |
---|
| 1026 | j = j + inc4 |
---|
| 1027 | END DO |
---|
| 1028 | ibase = ibase + inc1 |
---|
| 1029 | jbase = jbase + inc2 |
---|
| 1030 | END DO |
---|
| 1031 | ja = ja + jink |
---|
| 1032 | jink = 2*jink |
---|
| 1033 | jb = jb + jink |
---|
| 1034 | jc = jc + jink |
---|
| 1035 | jd = jd - jink |
---|
| 1036 | je = je - jink |
---|
| 1037 | jf = jf - jink |
---|
| 1038 | ibase = ibase + ijump |
---|
| 1039 | ijump = 2*ijump + iink |
---|
| 1040 | IF (jc==jd) GO TO 140 |
---|
| 1041 | DO k = la, kstop, la |
---|
| 1042 | kb = k + k |
---|
| 1043 | kc = kb + kb |
---|
| 1044 | kd = kc + kb |
---|
| 1045 | ke = kd + kb |
---|
| 1046 | kf = ke + kb |
---|
| 1047 | c1 = trigs(kb+1) |
---|
| 1048 | s1 = trigs(kb+2) |
---|
| 1049 | c2 = trigs(kc+1) |
---|
| 1050 | s2 = trigs(kc+2) |
---|
| 1051 | c3 = trigs(kd+1) |
---|
| 1052 | s3 = trigs(kd+2) |
---|
| 1053 | c4 = trigs(ke+1) |
---|
| 1054 | s4 = trigs(ke+2) |
---|
| 1055 | c5 = trigs(kf+1) |
---|
| 1056 | s5 = trigs(kf+2) |
---|
| 1057 | jbase = 0 |
---|
| 1058 | DO l = 1, la |
---|
| 1059 | i = ibase |
---|
| 1060 | j = jbase |
---|
| 1061 | !DIR$ IVDEP |
---|
| 1062 | !CDIR NODEP |
---|
| 1063 | !OCL NOVREC |
---|
| 1064 | DO ijk = 1, lot |
---|
| 1065 | a1 = c1*a(ib+i) + s1*b(ib+i) |
---|
| 1066 | b1 = c1*b(ib+i) - s1*a(ib+i) |
---|
| 1067 | a2 = c2*a(ic+i) + s2*b(ic+i) |
---|
| 1068 | b2 = c2*b(ic+i) - s2*a(ic+i) |
---|
| 1069 | a3 = c3*a(id+i) + s3*b(id+i) |
---|
| 1070 | b3 = c3*b(id+i) - s3*a(id+i) |
---|
| 1071 | a4 = c4*a(ie+i) + s4*b(ie+i) |
---|
| 1072 | b4 = c4*b(ie+i) - s4*a(ie+i) |
---|
| 1073 | a5 = c5*a(if+i) + s5*b(if+i) |
---|
| 1074 | b5 = c5*b(if+i) - s5*a(if+i) |
---|
| 1075 | a11 = (a2+a5) + (a1+a4) |
---|
[1342] | 1076 | a20 = (a(ia+i)+a3) - 0.5_wp*a11 |
---|
[1] | 1077 | a21 = sin60*((a2+a5)-(a1+a4)) |
---|
| 1078 | b11 = (b2+b5) + (b1+b4) |
---|
[1342] | 1079 | b20 = (b(ia+i)+b3) - 0.5_wp*b11 |
---|
[1] | 1080 | b21 = sin60*((b2+b5)-(b1+b4)) |
---|
| 1081 | c(ja+j) = (a(ia+i)+a3) + a11 |
---|
| 1082 | d(ja+j) = (b(ia+i)+b3) + b11 |
---|
| 1083 | c(jc+j) = a20 - b21 |
---|
| 1084 | d(jc+j) = a21 + b20 |
---|
| 1085 | c(je+j) = a20 + b21 |
---|
| 1086 | d(je+j) = a21 - b20 |
---|
| 1087 | a11 = (a2-a5) + (a4-a1) |
---|
[1342] | 1088 | a20 = (a(ia+i)-a3) - 0.5_wp*a11 |
---|
[1] | 1089 | a21 = sin60*((a4-a1)-(a2-a5)) |
---|
| 1090 | b11 = (b5-b2) - (b4-b1) |
---|
[1342] | 1091 | b20 = (b3-b(ia+i)) - 0.5_wp*b11 |
---|
[1] | 1092 | b21 = sin60*((b5-b2)+(b4-b1)) |
---|
| 1093 | c(jb+j) = a20 - b21 |
---|
| 1094 | d(jb+j) = a21 - b20 |
---|
| 1095 | c(jd+j) = a11 + (a(ia+i)-a3) |
---|
| 1096 | d(jd+j) = b11 + (b3-b(ia+i)) |
---|
| 1097 | c(jf+j) = a20 + b21 |
---|
| 1098 | d(jf+j) = a21 + b20 |
---|
| 1099 | i = i + inc3 |
---|
| 1100 | j = j + inc4 |
---|
| 1101 | END DO |
---|
| 1102 | ibase = ibase + inc1 |
---|
| 1103 | jbase = jbase + inc2 |
---|
| 1104 | END DO |
---|
| 1105 | ibase = ibase + ijump |
---|
| 1106 | ja = ja + jink |
---|
| 1107 | jb = jb + jink |
---|
| 1108 | jc = jc + jink |
---|
| 1109 | jd = jd - jink |
---|
| 1110 | je = je - jink |
---|
| 1111 | jf = jf - jink |
---|
| 1112 | END DO |
---|
| 1113 | IF (jc>jd) GO TO 170 |
---|
| 1114 | 140 CONTINUE |
---|
| 1115 | jbase = 0 |
---|
| 1116 | DO l = 1, la |
---|
| 1117 | i = ibase |
---|
| 1118 | j = jbase |
---|
| 1119 | !DIR$ IVDEP |
---|
| 1120 | !CDIR NODEP |
---|
| 1121 | !OCL NOVREC |
---|
| 1122 | DO ijk = 1, lot |
---|
[1342] | 1123 | c(ja+j) = (a(ia+i)+0.5_wp*(a(ic+i)-a(ie+i))) + sin60*(a(ib+i)-a(if+i)) |
---|
| 1124 | d(ja+j) = -(a(id+i)+0.5_wp*(a(ib+i)+a(if+i))) - sin60*(a(ic+i)+a(ie+i)) |
---|
[1] | 1125 | c(jb+j) = a(ia+i) - (a(ic+i)-a(ie+i)) |
---|
| 1126 | d(jb+j) = a(id+i) - (a(ib+i)+a(if+i)) |
---|
[1342] | 1127 | c(jc+j) = (a(ia+i)+0.5_wp*(a(ic+i)-a(ie+i))) - sin60*(a(ib+i)-a(if+i)) |
---|
| 1128 | d(jc+j) = -(a(id+i)+0.5_wp*(a(ib+i)+a(if+i))) + sin60*(a(ic+i)+a(ie+i)) |
---|
[1] | 1129 | i = i + inc3 |
---|
| 1130 | j = j + inc4 |
---|
| 1131 | END DO |
---|
| 1132 | ibase = ibase + inc1 |
---|
| 1133 | jbase = jbase + inc2 |
---|
| 1134 | END DO |
---|
| 1135 | |
---|
| 1136 | GO TO 170 |
---|
| 1137 | 150 CONTINUE |
---|
[1342] | 1138 | z = 1.0_wp/REAL(n,KIND=wp) |
---|
[1] | 1139 | zsin60 = z*sin60 |
---|
| 1140 | DO l = 1, la |
---|
| 1141 | i = ibase |
---|
| 1142 | j = jbase |
---|
| 1143 | !DIR$ IVDEP |
---|
| 1144 | !CDIR NODEP |
---|
| 1145 | !OCL NOVREC |
---|
| 1146 | DO ijk = 1, lot |
---|
| 1147 | a11 = (a(ic+i)+a(if+i)) + (a(ib+i)+a(ie+i)) |
---|
| 1148 | c(ja+j) = z*((a(ia+i)+a(id+i))+a11) |
---|
[1342] | 1149 | c(jc+j) = z*((a(ia+i)+a(id+i))-0.5_wp*a11) |
---|
[1] | 1150 | d(jc+j) = zsin60*((a(ic+i)+a(if+i))-(a(ib+i)+a(ie+i))) |
---|
| 1151 | a11 = (a(ic+i)-a(if+i)) + (a(ie+i)-a(ib+i)) |
---|
[1342] | 1152 | c(jb+j) = z*((a(ia+i)-a(id+i))-0.5_wp*a11) |
---|
[1] | 1153 | d(jb+j) = zsin60*((a(ie+i)-a(ib+i))-(a(ic+i)-a(if+i))) |
---|
| 1154 | c(jd+j) = z*((a(ia+i)-a(id+i))+a11) |
---|
| 1155 | i = i + inc3 |
---|
| 1156 | j = j + inc4 |
---|
| 1157 | END DO |
---|
| 1158 | ibase = ibase + inc1 |
---|
| 1159 | jbase = jbase + inc2 |
---|
| 1160 | END DO |
---|
| 1161 | GO TO 170 |
---|
| 1162 | |
---|
| 1163 | ! Coding for factor 8 |
---|
| 1164 | |
---|
| 1165 | 160 CONTINUE |
---|
| 1166 | ibad = 3 |
---|
| 1167 | IF (la/=m) GO TO 180 |
---|
| 1168 | ia = 1 |
---|
| 1169 | ib = ia + iink |
---|
| 1170 | ic = ib + iink |
---|
| 1171 | id = ic + iink |
---|
| 1172 | ie = id + iink |
---|
| 1173 | if = ie + iink |
---|
| 1174 | ig = if + iink |
---|
| 1175 | ih = ig + iink |
---|
| 1176 | ja = 1 |
---|
| 1177 | jb = ja + la*inc2 |
---|
| 1178 | jc = jb + 2*m*inc2 |
---|
| 1179 | jd = jc + 2*m*inc2 |
---|
| 1180 | je = jd + 2*m*inc2 |
---|
[1342] | 1181 | z = 1.0_wp/REAL(n,KIND=wp) |
---|
[1322] | 1182 | zsin45 = z*SQRT(0.5_wp) |
---|
[1] | 1183 | |
---|
| 1184 | DO l = 1, la |
---|
| 1185 | i = ibase |
---|
| 1186 | j = jbase |
---|
| 1187 | !DIR$ IVDEP |
---|
| 1188 | !CDIR NODEP |
---|
| 1189 | !OCL NOVREC |
---|
| 1190 | DO ijk = 1, lot |
---|
| 1191 | c(ja+j) = z*(((a(ia+i)+a(ie+i))+(a(ic+i)+a(ig+i)))+((a(id+i)+ & |
---|
| 1192 | & a(ih+i))+(a(ib+i)+a(if+i)))) |
---|
| 1193 | c(je+j) = z*(((a(ia+i)+a(ie+i))+(a(ic+i)+a(ig+i)))-((a(id+i)+ & |
---|
| 1194 | & a(ih+i))+(a(ib+i)+a(if+i)))) |
---|
| 1195 | c(jc+j) = z*((a(ia+i)+a(ie+i))-(a(ic+i)+a(ig+i))) |
---|
| 1196 | d(jc+j) = z*((a(id+i)+a(ih+i))-(a(ib+i)+a(if+i))) |
---|
| 1197 | c(jb+j) = z*(a(ia+i)-a(ie+i)) + zsin45*((a(ih+i)-a(id+i))-(a(if+ & |
---|
| 1198 | & i)-a(ib+i))) |
---|
| 1199 | c(jd+j) = z*(a(ia+i)-a(ie+i)) - zsin45*((a(ih+i)-a(id+i))-(a(if+ & |
---|
| 1200 | & i)-a(ib+i))) |
---|
| 1201 | d(jb+j) = zsin45*((a(ih+i)-a(id+i))+(a(if+i)-a(ib+i))) + & |
---|
| 1202 | & z*(a(ig+i)-a(ic+i)) |
---|
| 1203 | d(jd+j) = zsin45*((a(ih+i)-a(id+i))+(a(if+i)-a(ib+i))) - & |
---|
| 1204 | & z*(a(ig+i)-a(ic+i)) |
---|
| 1205 | i = i + inc3 |
---|
| 1206 | j = j + inc4 |
---|
| 1207 | END DO |
---|
| 1208 | ibase = ibase + inc1 |
---|
| 1209 | jbase = jbase + inc2 |
---|
| 1210 | END DO |
---|
| 1211 | |
---|
| 1212 | ! Return |
---|
| 1213 | |
---|
| 1214 | 170 CONTINUE |
---|
| 1215 | ibad = 0 |
---|
| 1216 | 180 CONTINUE |
---|
| 1217 | ierr = ibad |
---|
| 1218 | RETURN |
---|
| 1219 | END SUBROUTINE qpassm |
---|
| 1220 | |
---|
| 1221 | SUBROUTINE rpassm(a,b,c,d,trigs,inc1,inc2,inc3,inc4,lot,n,ifac,la,ierr) |
---|
| 1222 | ! Dimension a(n),b(n),c(n),d(n),trigs(n) |
---|
| 1223 | |
---|
[1320] | 1224 | USE kinds |
---|
| 1225 | |
---|
[1] | 1226 | IMPLICIT NONE |
---|
| 1227 | |
---|
| 1228 | ! Scalar arguments |
---|
[1320] | 1229 | INTEGER(iwp) :: ierr !: |
---|
| 1230 | INTEGER(iwp) :: ifac !: |
---|
| 1231 | INTEGER(iwp) :: inc1 !: |
---|
| 1232 | INTEGER(iwp) :: inc2 !: |
---|
| 1233 | INTEGER(iwp) :: inc3 !: |
---|
| 1234 | INTEGER(iwp) :: inc4 !: |
---|
| 1235 | INTEGER(iwp) :: la !: |
---|
| 1236 | INTEGER(iwp) :: lot !: |
---|
| 1237 | INTEGER(iwp) :: n !: |
---|
[1] | 1238 | |
---|
| 1239 | ! Array arguments |
---|
[1320] | 1240 | REAL(wp) :: a(*) !: |
---|
| 1241 | REAL(wp) :: b(*) !: |
---|
| 1242 | REAL(wp) :: c(*) !: |
---|
| 1243 | REAL(wp) :: d(*) !: |
---|
| 1244 | REAL(wp) :: trigs(*) !: |
---|
[1] | 1245 | |
---|
| 1246 | ! Local scalars: |
---|
[1320] | 1247 | REAL(wp) :: c1 !: |
---|
| 1248 | REAL(wp) :: c2 !: |
---|
| 1249 | REAL(wp) :: c3 !: |
---|
| 1250 | REAL(wp) :: c4 !: |
---|
| 1251 | REAL(wp) :: c5 !: |
---|
| 1252 | REAL(wp) :: qqrt5 !: |
---|
| 1253 | REAL(wp) :: qrt5 !: |
---|
| 1254 | REAL(wp) :: s1 !: |
---|
| 1255 | REAL(wp) :: s2 !: |
---|
| 1256 | REAL(wp) :: s3 !: |
---|
| 1257 | REAL(wp) :: s4 !: |
---|
| 1258 | REAL(wp) :: s5 !: |
---|
| 1259 | REAL(wp) :: sin36 !: |
---|
| 1260 | REAL(wp) :: sin45 !: |
---|
| 1261 | REAL(wp) :: sin60 !: |
---|
| 1262 | REAL(wp) :: sin72 !: |
---|
| 1263 | REAL(wp) :: ssin36 !: |
---|
| 1264 | REAL(wp) :: ssin45 !: |
---|
| 1265 | REAL(wp) :: ssin60 !: |
---|
| 1266 | REAL(wp) :: ssin72 !: |
---|
[1] | 1267 | |
---|
[1320] | 1268 | INTEGER(iwp) :: i !: |
---|
| 1269 | INTEGER(iwp) :: ia !: |
---|
| 1270 | INTEGER(iwp) :: ib !: |
---|
| 1271 | INTEGER(iwp) :: ibad !: |
---|
| 1272 | INTEGER(iwp) :: ibase !: |
---|
| 1273 | INTEGER(iwp) :: ic !: |
---|
| 1274 | INTEGER(iwp) :: id !: |
---|
| 1275 | INTEGER(iwp) :: ie !: |
---|
| 1276 | INTEGER(iwp) :: if !: |
---|
| 1277 | INTEGER(iwp) :: igo !: |
---|
| 1278 | INTEGER(iwp) :: iink !: |
---|
| 1279 | INTEGER(iwp) :: ijk !: |
---|
| 1280 | INTEGER(iwp) :: j !: |
---|
| 1281 | INTEGER(iwp) :: ja !: |
---|
| 1282 | INTEGER(iwp) :: jb !: |
---|
| 1283 | INTEGER(iwp) :: jbase !: |
---|
| 1284 | INTEGER(iwp) :: jc !: |
---|
| 1285 | INTEGER(iwp) :: jd !: |
---|
| 1286 | INTEGER(iwp) :: je !: |
---|
| 1287 | INTEGER(iwp) :: jf !: |
---|
| 1288 | INTEGER(iwp) :: jg !: |
---|
| 1289 | INTEGER(iwp) :: jh !: |
---|
| 1290 | INTEGER(iwp) :: jink !: |
---|
| 1291 | INTEGER(iwp) :: jump !: |
---|
| 1292 | INTEGER(iwp) :: k !: |
---|
| 1293 | INTEGER(iwp) :: kb !: |
---|
| 1294 | INTEGER(iwp) :: kc !: |
---|
| 1295 | INTEGER(iwp) :: kd !: |
---|
| 1296 | INTEGER(iwp) :: ke !: |
---|
| 1297 | INTEGER(iwp) :: kf !: |
---|
| 1298 | INTEGER(iwp) :: kstop !: |
---|
| 1299 | INTEGER(iwp) :: l !: |
---|
| 1300 | INTEGER(iwp) :: m !: |
---|
| 1301 | |
---|
[1] | 1302 | ! Local arrays: |
---|
[1320] | 1303 | REAL(wp) :: a10(nfft) !: |
---|
| 1304 | REAL(wp) :: a11(nfft) !: |
---|
| 1305 | REAL(wp) :: a20(nfft) !: |
---|
| 1306 | REAL(wp) :: a21(nfft) !: |
---|
| 1307 | REAL(wp) :: b10(nfft) !: |
---|
| 1308 | REAL(wp) :: b11(nfft) !: |
---|
| 1309 | REAL(wp) :: b20(nfft) !: |
---|
| 1310 | REAL(wp) :: b21(nfft) !: |
---|
[1] | 1311 | |
---|
| 1312 | ! Intrinsic functions |
---|
[1320] | 1313 | ! INTRINSIC SQRT |
---|
[1] | 1314 | |
---|
| 1315 | ! Data statements |
---|
[1320] | 1316 | DATA sin36/0.587785252292473_wp/, sin72/0.951056516295154_wp/, & |
---|
| 1317 | & qrt5/0.559016994374947_wp/, sin60/0.866025403784437_wp/ |
---|
[1] | 1318 | |
---|
| 1319 | |
---|
| 1320 | ! Executable statements |
---|
| 1321 | |
---|
| 1322 | m = n/ifac |
---|
| 1323 | iink = la*inc1 |
---|
| 1324 | jink = la*inc2 |
---|
| 1325 | jump = (ifac-1)*jink |
---|
| 1326 | kstop = (n-ifac)/(2*ifac) |
---|
| 1327 | |
---|
| 1328 | ibad = 1 |
---|
| 1329 | IF (lot>nfft) GO TO 180 |
---|
| 1330 | ibase = 0 |
---|
| 1331 | jbase = 0 |
---|
| 1332 | igo = ifac - 1 |
---|
| 1333 | IF (igo==7) igo = 6 |
---|
| 1334 | ibad = 2 |
---|
| 1335 | IF (igo<1 .OR. igo>6) GO TO 180 |
---|
| 1336 | GO TO (10,40,70,100,130,160) igo |
---|
| 1337 | |
---|
| 1338 | ! Coding for factor 2 |
---|
| 1339 | |
---|
| 1340 | 10 CONTINUE |
---|
| 1341 | ia = 1 |
---|
| 1342 | ib = ia + (2*m-la)*inc1 |
---|
| 1343 | ja = 1 |
---|
| 1344 | jb = ja + jink |
---|
| 1345 | |
---|
| 1346 | IF (la==m) GO TO 30 |
---|
| 1347 | |
---|
| 1348 | DO l = 1, la |
---|
| 1349 | i = ibase |
---|
| 1350 | j = jbase |
---|
| 1351 | !DIR$ IVDEP |
---|
| 1352 | !CDIR NODEP |
---|
| 1353 | !OCL NOVREC |
---|
| 1354 | DO ijk = 1, lot |
---|
| 1355 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1356 | c(jb+j) = a(ia+i) - a(ib+i) |
---|
| 1357 | i = i + inc3 |
---|
| 1358 | j = j + inc4 |
---|
| 1359 | END DO |
---|
| 1360 | ibase = ibase + inc1 |
---|
| 1361 | jbase = jbase + inc2 |
---|
| 1362 | END DO |
---|
| 1363 | ia = ia + iink |
---|
| 1364 | iink = 2*iink |
---|
| 1365 | ib = ib - iink |
---|
| 1366 | ibase = 0 |
---|
| 1367 | jbase = jbase + jump |
---|
| 1368 | jump = 2*jump + jink |
---|
| 1369 | IF (ia==ib) GO TO 20 |
---|
| 1370 | DO k = la, kstop, la |
---|
| 1371 | kb = k + k |
---|
| 1372 | c1 = trigs(kb+1) |
---|
| 1373 | s1 = trigs(kb+2) |
---|
| 1374 | ibase = 0 |
---|
| 1375 | DO l = 1, la |
---|
| 1376 | i = ibase |
---|
| 1377 | j = jbase |
---|
| 1378 | !DIR$ IVDEP |
---|
| 1379 | !CDIR NODEP |
---|
| 1380 | !OCL NOVREC |
---|
| 1381 | DO ijk = 1, lot |
---|
| 1382 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1383 | d(ja+j) = b(ia+i) - b(ib+i) |
---|
| 1384 | c(jb+j) = c1*(a(ia+i)-a(ib+i)) - s1*(b(ia+i)+b(ib+i)) |
---|
| 1385 | d(jb+j) = s1*(a(ia+i)-a(ib+i)) + c1*(b(ia+i)+b(ib+i)) |
---|
| 1386 | i = i + inc3 |
---|
| 1387 | j = j + inc4 |
---|
| 1388 | END DO |
---|
| 1389 | ibase = ibase + inc1 |
---|
| 1390 | jbase = jbase + inc2 |
---|
| 1391 | END DO |
---|
| 1392 | ia = ia + iink |
---|
| 1393 | ib = ib - iink |
---|
| 1394 | jbase = jbase + jump |
---|
| 1395 | END DO |
---|
| 1396 | IF (ia>ib) GO TO 170 |
---|
| 1397 | 20 CONTINUE |
---|
| 1398 | ibase = 0 |
---|
| 1399 | DO l = 1, la |
---|
| 1400 | i = ibase |
---|
| 1401 | j = jbase |
---|
| 1402 | !DIR$ IVDEP |
---|
| 1403 | !CDIR NODEP |
---|
| 1404 | !OCL NOVREC |
---|
| 1405 | DO ijk = 1, lot |
---|
| 1406 | c(ja+j) = a(ia+i) |
---|
| 1407 | c(jb+j) = -b(ia+i) |
---|
| 1408 | i = i + inc3 |
---|
| 1409 | j = j + inc4 |
---|
| 1410 | END DO |
---|
| 1411 | ibase = ibase + inc1 |
---|
| 1412 | jbase = jbase + inc2 |
---|
| 1413 | END DO |
---|
| 1414 | |
---|
| 1415 | GO TO 170 |
---|
| 1416 | 30 CONTINUE |
---|
| 1417 | DO l = 1, la |
---|
| 1418 | i = ibase |
---|
| 1419 | j = jbase |
---|
| 1420 | !DIR$ IVDEP |
---|
| 1421 | !CDIR NODEP |
---|
| 1422 | !OCL NOVREC |
---|
| 1423 | DO ijk = 1, lot |
---|
[1342] | 1424 | c(ja+j) = 2.0_wp*(a(ia+i)+a(ib+i)) |
---|
| 1425 | c(jb+j) = 2.0_wp*(a(ia+i)-a(ib+i)) |
---|
[1] | 1426 | i = i + inc3 |
---|
| 1427 | j = j + inc4 |
---|
| 1428 | END DO |
---|
| 1429 | ibase = ibase + inc1 |
---|
| 1430 | jbase = jbase + inc2 |
---|
| 1431 | END DO |
---|
| 1432 | GO TO 170 |
---|
| 1433 | |
---|
| 1434 | ! Coding for factor 3 |
---|
| 1435 | |
---|
| 1436 | 40 CONTINUE |
---|
| 1437 | ia = 1 |
---|
| 1438 | ib = ia + (2*m-la)*inc1 |
---|
| 1439 | ic = ib |
---|
| 1440 | ja = 1 |
---|
| 1441 | jb = ja + jink |
---|
| 1442 | jc = jb + jink |
---|
| 1443 | |
---|
| 1444 | IF (la==m) GO TO 60 |
---|
| 1445 | |
---|
| 1446 | DO l = 1, la |
---|
| 1447 | i = ibase |
---|
| 1448 | j = jbase |
---|
| 1449 | !DIR$ IVDEP |
---|
| 1450 | !CDIR NODEP |
---|
| 1451 | !OCL NOVREC |
---|
| 1452 | DO ijk = 1, lot |
---|
| 1453 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
[1342] | 1454 | c(jb+j) = (a(ia+i)-0.5_wp*a(ib+i)) - (sin60*(b(ib+i))) |
---|
| 1455 | c(jc+j) = (a(ia+i)-0.5_wp*a(ib+i)) + (sin60*(b(ib+i))) |
---|
[1] | 1456 | i = i + inc3 |
---|
| 1457 | j = j + inc4 |
---|
| 1458 | END DO |
---|
| 1459 | ibase = ibase + inc1 |
---|
| 1460 | jbase = jbase + inc2 |
---|
| 1461 | END DO |
---|
| 1462 | ia = ia + iink |
---|
| 1463 | iink = 2*iink |
---|
| 1464 | ib = ib + iink |
---|
| 1465 | ic = ic - iink |
---|
| 1466 | jbase = jbase + jump |
---|
| 1467 | jump = 2*jump + jink |
---|
| 1468 | IF (ia==ic) GO TO 50 |
---|
| 1469 | DO k = la, kstop, la |
---|
| 1470 | kb = k + k |
---|
| 1471 | kc = kb + kb |
---|
| 1472 | c1 = trigs(kb+1) |
---|
| 1473 | s1 = trigs(kb+2) |
---|
| 1474 | c2 = trigs(kc+1) |
---|
| 1475 | s2 = trigs(kc+2) |
---|
| 1476 | ibase = 0 |
---|
| 1477 | DO l = 1, la |
---|
| 1478 | i = ibase |
---|
| 1479 | j = jbase |
---|
| 1480 | !DIR$ IVDEP |
---|
| 1481 | !CDIR NODEP |
---|
| 1482 | !OCL NOVREC |
---|
| 1483 | DO ijk = 1, lot |
---|
| 1484 | c(ja+j) = a(ia+i) + (a(ib+i)+a(ic+i)) |
---|
| 1485 | d(ja+j) = b(ia+i) + (b(ib+i)-b(ic+i)) |
---|
[1342] | 1486 | c(jb+j) = c1*((a(ia+i)-0.5_wp*(a(ib+i)+a(ic+i)))-(sin60*(b(ib+i)+ & |
---|
| 1487 | & b(ic+i)))) & |
---|
| 1488 | & - s1*((b(ia+i)-0.5_wp*(b(ib+i)-b(ic+i)))+(sin60*(a(ib+i)- & |
---|
[1] | 1489 | & a(ic+i)))) |
---|
[1342] | 1490 | d(jb+j) = s1*((a(ia+i)-0.5_wp*(a(ib+i)+a(ic+i)))-(sin60*(b(ib+i)+ & |
---|
| 1491 | & b(ic+i)))) & |
---|
| 1492 | & + c1*((b(ia+i)-0.5_wp*(b(ib+i)-b(ic+i)))+(sin60*(a(ib+i)- & |
---|
[1] | 1493 | & a(ic+i)))) |
---|
[1342] | 1494 | c(jc+j) = c2*((a(ia+i)-0.5_wp*(a(ib+i)+a(ic+i)))+(sin60*(b(ib+i)+ & |
---|
| 1495 | & b(ic+i)))) & |
---|
| 1496 | & - s2*((b(ia+i)-0.5_wp*(b(ib+i)-b(ic+i)))-(sin60*(a(ib+i)- & |
---|
[1] | 1497 | & a(ic+i)))) |
---|
[1342] | 1498 | d(jc+j) = s2*((a(ia+i)-0.5_wp*(a(ib+i)+a(ic+i)))+(sin60*(b(ib+i)+ & |
---|
| 1499 | & b(ic+i)))) & |
---|
| 1500 | & + c2*((b(ia+i)-0.5_wp*(b(ib+i)-b(ic+i)))-(sin60*(a(ib+i)- & |
---|
[1] | 1501 | & a(ic+i)))) |
---|
| 1502 | i = i + inc3 |
---|
| 1503 | j = j + inc4 |
---|
| 1504 | END DO |
---|
| 1505 | ibase = ibase + inc1 |
---|
| 1506 | jbase = jbase + inc2 |
---|
| 1507 | END DO |
---|
| 1508 | ia = ia + iink |
---|
| 1509 | ib = ib + iink |
---|
| 1510 | ic = ic - iink |
---|
| 1511 | jbase = jbase + jump |
---|
| 1512 | END DO |
---|
| 1513 | IF (ia>ic) GO TO 170 |
---|
| 1514 | 50 CONTINUE |
---|
| 1515 | ibase = 0 |
---|
| 1516 | DO l = 1, la |
---|
| 1517 | i = ibase |
---|
| 1518 | j = jbase |
---|
| 1519 | !DIR$ IVDEP |
---|
| 1520 | !CDIR NODEP |
---|
| 1521 | !OCL NOVREC |
---|
| 1522 | DO ijk = 1, lot |
---|
| 1523 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
[1342] | 1524 | c(jb+j) = (0.5_wp*a(ia+i)-a(ib+i)) - (sin60*b(ia+i)) |
---|
| 1525 | c(jc+j) = -(0.5_wp*a(ia+i)-a(ib+i)) - (sin60*b(ia+i)) |
---|
[1] | 1526 | i = i + inc3 |
---|
| 1527 | j = j + inc4 |
---|
| 1528 | END DO |
---|
| 1529 | ibase = ibase + inc1 |
---|
| 1530 | jbase = jbase + inc2 |
---|
| 1531 | END DO |
---|
| 1532 | |
---|
| 1533 | GO TO 170 |
---|
| 1534 | 60 CONTINUE |
---|
[1342] | 1535 | ssin60 = 2.0_wp*sin60 |
---|
[1] | 1536 | DO l = 1, la |
---|
| 1537 | i = ibase |
---|
| 1538 | j = jbase |
---|
| 1539 | !DIR$ IVDEP |
---|
| 1540 | !CDIR NODEP |
---|
| 1541 | !OCL NOVREC |
---|
| 1542 | DO ijk = 1, lot |
---|
[1342] | 1543 | c(ja+j) = 2.0_wp*(a(ia+i)+a(ib+i)) |
---|
| 1544 | c(jb+j) = (2.0_wp*a(ia+i)-a(ib+i)) - (ssin60*b(ib+i)) |
---|
| 1545 | c(jc+j) = (2.0_wp*a(ia+i)-a(ib+i)) + (ssin60*b(ib+i)) |
---|
[1] | 1546 | i = i + inc3 |
---|
| 1547 | j = j + inc4 |
---|
| 1548 | END DO |
---|
| 1549 | ibase = ibase + inc1 |
---|
| 1550 | jbase = jbase + inc2 |
---|
| 1551 | END DO |
---|
| 1552 | GO TO 170 |
---|
| 1553 | |
---|
| 1554 | ! Coding for factor 4 |
---|
| 1555 | |
---|
| 1556 | 70 CONTINUE |
---|
| 1557 | ia = 1 |
---|
| 1558 | ib = ia + (2*m-la)*inc1 |
---|
| 1559 | ic = ib + 2*m*inc1 |
---|
| 1560 | id = ib |
---|
| 1561 | ja = 1 |
---|
| 1562 | jb = ja + jink |
---|
| 1563 | jc = jb + jink |
---|
| 1564 | jd = jc + jink |
---|
| 1565 | |
---|
| 1566 | IF (la==m) GO TO 90 |
---|
| 1567 | |
---|
| 1568 | DO l = 1, la |
---|
| 1569 | i = ibase |
---|
| 1570 | j = jbase |
---|
| 1571 | !DIR$ IVDEP |
---|
| 1572 | !CDIR NODEP |
---|
| 1573 | !OCL NOVREC |
---|
| 1574 | DO ijk = 1, lot |
---|
| 1575 | c(ja+j) = (a(ia+i)+a(ic+i)) + a(ib+i) |
---|
| 1576 | c(jb+j) = (a(ia+i)-a(ic+i)) - b(ib+i) |
---|
| 1577 | c(jc+j) = (a(ia+i)+a(ic+i)) - a(ib+i) |
---|
| 1578 | c(jd+j) = (a(ia+i)-a(ic+i)) + b(ib+i) |
---|
| 1579 | i = i + inc3 |
---|
| 1580 | j = j + inc4 |
---|
| 1581 | END DO |
---|
| 1582 | ibase = ibase + inc1 |
---|
| 1583 | jbase = jbase + inc2 |
---|
| 1584 | END DO |
---|
| 1585 | ia = ia + iink |
---|
| 1586 | iink = 2*iink |
---|
| 1587 | ib = ib + iink |
---|
| 1588 | ic = ic - iink |
---|
| 1589 | id = id - iink |
---|
| 1590 | jbase = jbase + jump |
---|
| 1591 | jump = 2*jump + jink |
---|
| 1592 | IF (ib==ic) GO TO 80 |
---|
| 1593 | DO k = la, kstop, la |
---|
| 1594 | kb = k + k |
---|
| 1595 | kc = kb + kb |
---|
| 1596 | kd = kc + kb |
---|
| 1597 | c1 = trigs(kb+1) |
---|
| 1598 | s1 = trigs(kb+2) |
---|
| 1599 | c2 = trigs(kc+1) |
---|
| 1600 | s2 = trigs(kc+2) |
---|
| 1601 | c3 = trigs(kd+1) |
---|
| 1602 | s3 = trigs(kd+2) |
---|
| 1603 | ibase = 0 |
---|
| 1604 | DO l = 1, la |
---|
| 1605 | i = ibase |
---|
| 1606 | j = jbase |
---|
| 1607 | !DIR$ IVDEP |
---|
| 1608 | !CDIR NODEP |
---|
| 1609 | !OCL NOVREC |
---|
| 1610 | DO ijk = 1, lot |
---|
| 1611 | c(ja+j) = (a(ia+i)+a(ic+i)) + (a(ib+i)+a(id+i)) |
---|
| 1612 | d(ja+j) = (b(ia+i)-b(ic+i)) + (b(ib+i)-b(id+i)) |
---|
| 1613 | c(jc+j) = c2*((a(ia+i)+a(ic+i))-(a(ib+i)+a(id+i))) - s2*((b(ia+ & |
---|
| 1614 | & i)-b(ic+i))-(b(ib+i)-b(id+i))) |
---|
| 1615 | d(jc+j) = s2*((a(ia+i)+a(ic+i))-(a(ib+i)+a(id+i))) + c2*((b(ia+ & |
---|
| 1616 | & i)-b(ic+i))-(b(ib+i)-b(id+i))) |
---|
| 1617 | c(jb+j) = c1*((a(ia+i)-a(ic+i))-(b(ib+i)+b(id+i))) - s1*((b(ia+ & |
---|
| 1618 | & i)+b(ic+i))+(a(ib+i)-a(id+i))) |
---|
| 1619 | d(jb+j) = s1*((a(ia+i)-a(ic+i))-(b(ib+i)+b(id+i))) + c1*((b(ia+ & |
---|
| 1620 | & i)+b(ic+i))+(a(ib+i)-a(id+i))) |
---|
| 1621 | c(jd+j) = c3*((a(ia+i)-a(ic+i))+(b(ib+i)+b(id+i))) - s3*((b(ia+ & |
---|
| 1622 | & i)+b(ic+i))-(a(ib+i)-a(id+i))) |
---|
| 1623 | d(jd+j) = s3*((a(ia+i)-a(ic+i))+(b(ib+i)+b(id+i))) + c3*((b(ia+ & |
---|
| 1624 | & i)+b(ic+i))-(a(ib+i)-a(id+i))) |
---|
| 1625 | i = i + inc3 |
---|
| 1626 | j = j + inc4 |
---|
| 1627 | END DO |
---|
| 1628 | ibase = ibase + inc1 |
---|
| 1629 | jbase = jbase + inc2 |
---|
| 1630 | END DO |
---|
| 1631 | ia = ia + iink |
---|
| 1632 | ib = ib + iink |
---|
| 1633 | ic = ic - iink |
---|
| 1634 | id = id - iink |
---|
| 1635 | jbase = jbase + jump |
---|
| 1636 | END DO |
---|
| 1637 | IF (ib>ic) GO TO 170 |
---|
| 1638 | 80 CONTINUE |
---|
| 1639 | ibase = 0 |
---|
[1322] | 1640 | sin45 = SQRT(0.5_wp) |
---|
[1] | 1641 | DO l = 1, la |
---|
| 1642 | i = ibase |
---|
| 1643 | j = jbase |
---|
| 1644 | !DIR$ IVDEP |
---|
| 1645 | !CDIR NODEP |
---|
| 1646 | !OCL NOVREC |
---|
| 1647 | DO ijk = 1, lot |
---|
| 1648 | c(ja+j) = a(ia+i) + a(ib+i) |
---|
| 1649 | c(jb+j) = sin45*((a(ia+i)-a(ib+i))-(b(ia+i)+b(ib+i))) |
---|
| 1650 | c(jc+j) = b(ib+i) - b(ia+i) |
---|
| 1651 | c(jd+j) = -sin45*((a(ia+i)-a(ib+i))+(b(ia+i)+b(ib+i))) |
---|
| 1652 | i = i + inc3 |
---|
| 1653 | j = j + inc4 |
---|
| 1654 | END DO |
---|
| 1655 | ibase = ibase + inc1 |
---|
| 1656 | jbase = jbase + inc2 |
---|
| 1657 | END DO |
---|
| 1658 | |
---|
| 1659 | GO TO 170 |
---|
| 1660 | 90 CONTINUE |
---|
| 1661 | DO l = 1, la |
---|
| 1662 | i = ibase |
---|
| 1663 | j = jbase |
---|
| 1664 | !DIR$ IVDEP |
---|
| 1665 | !CDIR NODEP |
---|
| 1666 | !OCL NOVREC |
---|
| 1667 | DO ijk = 1, lot |
---|
[1342] | 1668 | c(ja+j) = 2.0_wp*((a(ia+i)+a(ic+i))+a(ib+i)) |
---|
| 1669 | c(jb+j) = 2.0_wp*((a(ia+i)-a(ic+i))-b(ib+i)) |
---|
| 1670 | c(jc+j) = 2.0_wp*((a(ia+i)+a(ic+i))-a(ib+i)) |
---|
| 1671 | c(jd+j) = 2.0_wp*((a(ia+i)-a(ic+i))+b(ib+i)) |
---|
[1] | 1672 | i = i + inc3 |
---|
| 1673 | j = j + inc4 |
---|
| 1674 | END DO |
---|
| 1675 | ibase = ibase + inc1 |
---|
| 1676 | jbase = jbase + inc2 |
---|
| 1677 | END DO |
---|
| 1678 | |
---|
| 1679 | ! Coding for factor 5 |
---|
| 1680 | |
---|
| 1681 | GO TO 170 |
---|
| 1682 | 100 CONTINUE |
---|
| 1683 | ia = 1 |
---|
| 1684 | ib = ia + (2*m-la)*inc1 |
---|
| 1685 | ic = ib + 2*m*inc1 |
---|
| 1686 | id = ic |
---|
| 1687 | ie = ib |
---|
| 1688 | ja = 1 |
---|
| 1689 | jb = ja + jink |
---|
| 1690 | jc = jb + jink |
---|
| 1691 | jd = jc + jink |
---|
| 1692 | je = jd + jink |
---|
| 1693 | |
---|
| 1694 | IF (la==m) GO TO 120 |
---|
| 1695 | |
---|
| 1696 | DO l = 1, la |
---|
| 1697 | i = ibase |
---|
| 1698 | j = jbase |
---|
| 1699 | !DIR$ IVDEP |
---|
| 1700 | !CDIR NODEP |
---|
| 1701 | !OCL NOVREC |
---|
| 1702 | DO ijk = 1, lot |
---|
| 1703 | c(ja+j) = a(ia+i) + (a(ib+i)+a(ic+i)) |
---|
[1342] | 1704 | c(jb+j) = ((a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))+qrt5*(a(ib+i)-a(ic+i))) - & |
---|
[1] | 1705 | & (sin72*b(ib+i)+sin36*b(ic+i)) |
---|
[1342] | 1706 | c(jc+j) = ((a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))-qrt5*(a(ib+i)-a(ic+i))) - & |
---|
[1] | 1707 | & (sin36*b(ib+i)-sin72*b(ic+i)) |
---|
[1342] | 1708 | c(jd+j) = ((a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))-qrt5*(a(ib+i)-a(ic+i))) + & |
---|
[1] | 1709 | & (sin36*b(ib+i)-sin72*b(ic+i)) |
---|
[1342] | 1710 | c(je+j) = ((a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))+qrt5*(a(ib+i)-a(ic+i))) + & |
---|
[1] | 1711 | & (sin72*b(ib+i)+sin36*b(ic+i)) |
---|
| 1712 | i = i + inc3 |
---|
| 1713 | j = j + inc4 |
---|
| 1714 | END DO |
---|
| 1715 | ibase = ibase + inc1 |
---|
| 1716 | jbase = jbase + inc2 |
---|
| 1717 | END DO |
---|
| 1718 | ia = ia + iink |
---|
| 1719 | iink = 2*iink |
---|
| 1720 | ib = ib + iink |
---|
| 1721 | ic = ic + iink |
---|
| 1722 | id = id - iink |
---|
| 1723 | ie = ie - iink |
---|
| 1724 | jbase = jbase + jump |
---|
| 1725 | jump = 2*jump + jink |
---|
| 1726 | IF (ib==id) GO TO 110 |
---|
| 1727 | DO k = la, kstop, la |
---|
| 1728 | kb = k + k |
---|
| 1729 | kc = kb + kb |
---|
| 1730 | kd = kc + kb |
---|
| 1731 | ke = kd + kb |
---|
| 1732 | c1 = trigs(kb+1) |
---|
| 1733 | s1 = trigs(kb+2) |
---|
| 1734 | c2 = trigs(kc+1) |
---|
| 1735 | s2 = trigs(kc+2) |
---|
| 1736 | c3 = trigs(kd+1) |
---|
| 1737 | s3 = trigs(kd+2) |
---|
| 1738 | c4 = trigs(ke+1) |
---|
| 1739 | s4 = trigs(ke+2) |
---|
| 1740 | ibase = 0 |
---|
| 1741 | DO l = 1, la |
---|
| 1742 | i = ibase |
---|
| 1743 | j = jbase |
---|
| 1744 | !DIR$ IVDEP |
---|
| 1745 | !CDIR NODEP |
---|
| 1746 | !OCL NOVREC |
---|
| 1747 | DO ijk = 1, lot |
---|
| 1748 | |
---|
[1342] | 1749 | a10(ijk) = (a(ia+i)-0.25_wp*((a(ib+i)+a(ie+i))+(a(ic+i)+a(id+i)))) + & |
---|
[1] | 1750 | & qrt5*((a(ib+i)+a(ie+i))-(a(ic+i)+a(id+i))) |
---|
[1342] | 1751 | a20(ijk) = (a(ia+i)-0.25_wp*((a(ib+i)+a(ie+i))+(a(ic+i)+a(id+i)))) - & |
---|
[1] | 1752 | & qrt5*((a(ib+i)+a(ie+i))-(a(ic+i)+a(id+i))) |
---|
[1342] | 1753 | b10(ijk) = (b(ia+i)-0.25_wp*((b(ib+i)-b(ie+i))+(b(ic+i)-b(id+i)))) + & |
---|
[1] | 1754 | & qrt5*((b(ib+i)-b(ie+i))-(b(ic+i)-b(id+i))) |
---|
[1342] | 1755 | b20(ijk) = (b(ia+i)-0.25_wp*((b(ib+i)-b(ie+i))+(b(ic+i)-b(id+i)))) - & |
---|
[1] | 1756 | & qrt5*((b(ib+i)-b(ie+i))-(b(ic+i)-b(id+i))) |
---|
| 1757 | a11(ijk) = sin72*(b(ib+i)+b(ie+i)) + sin36*(b(ic+i)+b(id+i)) |
---|
| 1758 | a21(ijk) = sin36*(b(ib+i)+b(ie+i)) - sin72*(b(ic+i)+b(id+i)) |
---|
| 1759 | b11(ijk) = sin72*(a(ib+i)-a(ie+i)) + sin36*(a(ic+i)-a(id+i)) |
---|
| 1760 | b21(ijk) = sin36*(a(ib+i)-a(ie+i)) - sin72*(a(ic+i)-a(id+i)) |
---|
| 1761 | |
---|
| 1762 | c(ja+j) = a(ia+i) + ((a(ib+i)+a(ie+i))+(a(ic+i)+a(id+i))) |
---|
| 1763 | d(ja+j) = b(ia+i) + ((b(ib+i)-b(ie+i))+(b(ic+i)-b(id+i))) |
---|
| 1764 | c(jb+j) = c1*(a10(ijk)-a11(ijk)) - s1*(b10(ijk)+b11(ijk)) |
---|
| 1765 | d(jb+j) = s1*(a10(ijk)-a11(ijk)) + c1*(b10(ijk)+b11(ijk)) |
---|
| 1766 | c(je+j) = c4*(a10(ijk)+a11(ijk)) - s4*(b10(ijk)-b11(ijk)) |
---|
| 1767 | d(je+j) = s4*(a10(ijk)+a11(ijk)) + c4*(b10(ijk)-b11(ijk)) |
---|
| 1768 | c(jc+j) = c2*(a20(ijk)-a21(ijk)) - s2*(b20(ijk)+b21(ijk)) |
---|
| 1769 | d(jc+j) = s2*(a20(ijk)-a21(ijk)) + c2*(b20(ijk)+b21(ijk)) |
---|
| 1770 | c(jd+j) = c3*(a20(ijk)+a21(ijk)) - s3*(b20(ijk)-b21(ijk)) |
---|
| 1771 | d(jd+j) = s3*(a20(ijk)+a21(ijk)) + c3*(b20(ijk)-b21(ijk)) |
---|
| 1772 | |
---|
| 1773 | i = i + inc3 |
---|
| 1774 | j = j + inc4 |
---|
| 1775 | END DO |
---|
| 1776 | ibase = ibase + inc1 |
---|
| 1777 | jbase = jbase + inc2 |
---|
| 1778 | END DO |
---|
| 1779 | ia = ia + iink |
---|
| 1780 | ib = ib + iink |
---|
| 1781 | ic = ic + iink |
---|
| 1782 | id = id - iink |
---|
| 1783 | ie = ie - iink |
---|
| 1784 | jbase = jbase + jump |
---|
| 1785 | END DO |
---|
| 1786 | IF (ib>id) GO TO 170 |
---|
| 1787 | 110 CONTINUE |
---|
| 1788 | ibase = 0 |
---|
| 1789 | DO l = 1, la |
---|
| 1790 | i = ibase |
---|
| 1791 | j = jbase |
---|
| 1792 | !DIR$ IVDEP |
---|
| 1793 | !CDIR NODEP |
---|
| 1794 | !OCL NOVREC |
---|
| 1795 | DO ijk = 1, lot |
---|
| 1796 | c(ja+j) = (a(ia+i)+a(ib+i)) + a(ic+i) |
---|
[1342] | 1797 | c(jb+j) = (qrt5*(a(ia+i)-a(ib+i))+(0.25_wp*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
[1] | 1798 | & (sin36*b(ia+i)+sin72*b(ib+i)) |
---|
[1342] | 1799 | c(je+j) = -(qrt5*(a(ia+i)-a(ib+i))+(0.25_wp*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
[1] | 1800 | & (sin36*b(ia+i)+sin72*b(ib+i)) |
---|
[1342] | 1801 | c(jc+j) = (qrt5*(a(ia+i)-a(ib+i))-(0.25_wp*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
[1] | 1802 | & (sin72*b(ia+i)-sin36*b(ib+i)) |
---|
[1342] | 1803 | c(jd+j) = -(qrt5*(a(ia+i)-a(ib+i))-(0.25_wp*(a(ia+i)+a(ib+i))-a(ic+i))) - & |
---|
[1] | 1804 | & (sin72*b(ia+i)-sin36*b(ib+i)) |
---|
| 1805 | i = i + inc3 |
---|
| 1806 | j = j + inc4 |
---|
| 1807 | END DO |
---|
| 1808 | ibase = ibase + inc1 |
---|
| 1809 | jbase = jbase + inc2 |
---|
| 1810 | END DO |
---|
| 1811 | |
---|
| 1812 | GO TO 170 |
---|
| 1813 | 120 CONTINUE |
---|
[1320] | 1814 | qqrt5 = 2.0_wp*qrt5 |
---|
| 1815 | ssin36 = 2.0_wp*sin36 |
---|
| 1816 | ssin72 = 2.0_wp*sin72 |
---|
[1] | 1817 | DO l = 1, la |
---|
| 1818 | i = ibase |
---|
| 1819 | j = jbase |
---|
| 1820 | !DIR$ IVDEP |
---|
| 1821 | !CDIR NODEP |
---|
| 1822 | !OCL NOVREC |
---|
| 1823 | DO ijk = 1, lot |
---|
[1342] | 1824 | c(ja+j) = 2.0_wp*(a(ia+i)+(a(ib+i)+a(ic+i))) |
---|
| 1825 | c(jb+j) = (2.0_wp*(a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))+qqrt5*(a(ib+i)-a(ic+ & |
---|
[1] | 1826 | & i))) - (ssin72*b(ib+i)+ssin36*b(ic+i)) |
---|
[1342] | 1827 | c(jc+j) = (2.0_wp*(a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))-qqrt5*(a(ib+i)-a(ic+ & |
---|
[1] | 1828 | & i))) - (ssin36*b(ib+i)-ssin72*b(ic+i)) |
---|
[1342] | 1829 | c(jd+j) = (2.0_wp*(a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))-qqrt5*(a(ib+i)-a(ic+ & |
---|
[1] | 1830 | & i))) + (ssin36*b(ib+i)-ssin72*b(ic+i)) |
---|
[1342] | 1831 | c(je+j) = (2.0_wp*(a(ia+i)-0.25_wp*(a(ib+i)+a(ic+i)))+qqrt5*(a(ib+i)-a(ic+ & |
---|
[1] | 1832 | & i))) + (ssin72*b(ib+i)+ssin36*b(ic+i)) |
---|
| 1833 | i = i + inc3 |
---|
| 1834 | j = j + inc4 |
---|
| 1835 | END DO |
---|
| 1836 | ibase = ibase + inc1 |
---|
| 1837 | jbase = jbase + inc2 |
---|
| 1838 | END DO |
---|
| 1839 | GO TO 170 |
---|
| 1840 | |
---|
| 1841 | ! Coding for factor 6 |
---|
| 1842 | |
---|
| 1843 | 130 CONTINUE |
---|
| 1844 | ia = 1 |
---|
| 1845 | ib = ia + (2*m-la)*inc1 |
---|
| 1846 | ic = ib + 2*m*inc1 |
---|
| 1847 | id = ic + 2*m*inc1 |
---|
| 1848 | ie = ic |
---|
| 1849 | if = ib |
---|
| 1850 | ja = 1 |
---|
| 1851 | jb = ja + jink |
---|
| 1852 | jc = jb + jink |
---|
| 1853 | jd = jc + jink |
---|
| 1854 | je = jd + jink |
---|
| 1855 | jf = je + jink |
---|
| 1856 | |
---|
| 1857 | IF (la==m) GO TO 150 |
---|
| 1858 | |
---|
| 1859 | DO l = 1, la |
---|
| 1860 | i = ibase |
---|
| 1861 | j = jbase |
---|
| 1862 | !DIR$ IVDEP |
---|
| 1863 | !CDIR NODEP |
---|
| 1864 | !OCL NOVREC |
---|
| 1865 | DO ijk = 1, lot |
---|
| 1866 | c(ja+j) = (a(ia+i)+a(id+i)) + (a(ib+i)+a(ic+i)) |
---|
| 1867 | c(jd+j) = (a(ia+i)-a(id+i)) - (a(ib+i)-a(ic+i)) |
---|
[1342] | 1868 | c(jb+j) = ((a(ia+i)-a(id+i))+0.5_wp*(a(ib+i)-a(ic+i))) - (sin60*(b(ib+ & |
---|
[1] | 1869 | & i)+b(ic+i))) |
---|
[1342] | 1870 | c(jf+j) = ((a(ia+i)-a(id+i))+0.5_wp*(a(ib+i)-a(ic+i))) + (sin60*(b(ib+ & |
---|
[1] | 1871 | & i)+b(ic+i))) |
---|
[1342] | 1872 | c(jc+j) = ((a(ia+i)+a(id+i))-0.5_wp*(a(ib+i)+a(ic+i))) - (sin60*(b(ib+ & |
---|
[1] | 1873 | & i)-b(ic+i))) |
---|
[1342] | 1874 | c(je+j) = ((a(ia+i)+a(id+i))-0.5_wp*(a(ib+i)+a(ic+i))) + (sin60*(b(ib+ & |
---|
[1] | 1875 | & i)-b(ic+i))) |
---|
| 1876 | i = i + inc3 |
---|
| 1877 | j = j + inc4 |
---|
| 1878 | END DO |
---|
| 1879 | ibase = ibase + inc1 |
---|
| 1880 | jbase = jbase + inc2 |
---|
| 1881 | END DO |
---|
| 1882 | ia = ia + iink |
---|
| 1883 | iink = 2*iink |
---|
| 1884 | ib = ib + iink |
---|
| 1885 | ic = ic + iink |
---|
| 1886 | id = id - iink |
---|
| 1887 | ie = ie - iink |
---|
| 1888 | if = if - iink |
---|
| 1889 | jbase = jbase + jump |
---|
| 1890 | jump = 2*jump + jink |
---|
| 1891 | IF (ic==id) GO TO 140 |
---|
| 1892 | DO k = la, kstop, la |
---|
| 1893 | kb = k + k |
---|
| 1894 | kc = kb + kb |
---|
| 1895 | kd = kc + kb |
---|
| 1896 | ke = kd + kb |
---|
| 1897 | kf = ke + kb |
---|
| 1898 | c1 = trigs(kb+1) |
---|
| 1899 | s1 = trigs(kb+2) |
---|
| 1900 | c2 = trigs(kc+1) |
---|
| 1901 | s2 = trigs(kc+2) |
---|
| 1902 | c3 = trigs(kd+1) |
---|
| 1903 | s3 = trigs(kd+2) |
---|
| 1904 | c4 = trigs(ke+1) |
---|
| 1905 | s4 = trigs(ke+2) |
---|
| 1906 | c5 = trigs(kf+1) |
---|
| 1907 | s5 = trigs(kf+2) |
---|
| 1908 | ibase = 0 |
---|
| 1909 | DO l = 1, la |
---|
| 1910 | i = ibase |
---|
| 1911 | j = jbase |
---|
| 1912 | !DIR$ IVDEP |
---|
| 1913 | !CDIR NODEP |
---|
| 1914 | !OCL NOVREC |
---|
| 1915 | DO ijk = 1, lot |
---|
| 1916 | |
---|
| 1917 | a11(ijk) = (a(ie+i)+a(ib+i)) + (a(ic+i)+a(if+i)) |
---|
[1342] | 1918 | a20(ijk) = (a(ia+i)+a(id+i)) - 0.5_wp*a11(ijk) |
---|
[1] | 1919 | a21(ijk) = sin60*((a(ie+i)+a(ib+i))-(a(ic+i)+a(if+i))) |
---|
| 1920 | b11(ijk) = (b(ib+i)-b(ie+i)) + (b(ic+i)-b(if+i)) |
---|
[1342] | 1921 | b20(ijk) = (b(ia+i)-b(id+i)) - 0.5_wp*b11(ijk) |
---|
[1] | 1922 | b21(ijk) = sin60*((b(ib+i)-b(ie+i))-(b(ic+i)-b(if+i))) |
---|
| 1923 | |
---|
| 1924 | c(ja+j) = (a(ia+i)+a(id+i)) + a11(ijk) |
---|
| 1925 | d(ja+j) = (b(ia+i)-b(id+i)) + b11(ijk) |
---|
| 1926 | c(jc+j) = c2*(a20(ijk)-b21(ijk)) - s2*(b20(ijk)+a21(ijk)) |
---|
| 1927 | d(jc+j) = s2*(a20(ijk)-b21(ijk)) + c2*(b20(ijk)+a21(ijk)) |
---|
| 1928 | c(je+j) = c4*(a20(ijk)+b21(ijk)) - s4*(b20(ijk)-a21(ijk)) |
---|
| 1929 | d(je+j) = s4*(a20(ijk)+b21(ijk)) + c4*(b20(ijk)-a21(ijk)) |
---|
| 1930 | |
---|
| 1931 | a11(ijk) = (a(ie+i)-a(ib+i)) + (a(ic+i)-a(if+i)) |
---|
| 1932 | b11(ijk) = (b(ie+i)+b(ib+i)) - (b(ic+i)+b(if+i)) |
---|
[1342] | 1933 | a20(ijk) = (a(ia+i)-a(id+i)) - 0.5_wp*a11(ijk) |
---|
[1] | 1934 | a21(ijk) = sin60*((a(ie+i)-a(ib+i))-(a(ic+i)-a(if+i))) |
---|
[1342] | 1935 | b20(ijk) = (b(ia+i)+b(id+i)) + 0.5_wp*b11(ijk) |
---|
[1] | 1936 | b21(ijk) = sin60*((b(ie+i)+b(ib+i))+(b(ic+i)+b(if+i))) |
---|
| 1937 | |
---|
| 1938 | c(jd+j) = c3*((a(ia+i)-a(id+i))+a11(ijk)) - s3*((b(ia+i)+b(id+ & |
---|
| 1939 | & i))-b11(ijk)) |
---|
| 1940 | d(jd+j) = s3*((a(ia+i)-a(id+i))+a11(ijk)) + c3*((b(ia+i)+b(id+ & |
---|
| 1941 | & i))-b11(ijk)) |
---|
| 1942 | c(jb+j) = c1*(a20(ijk)-b21(ijk)) - s1*(b20(ijk)-a21(ijk)) |
---|
| 1943 | d(jb+j) = s1*(a20(ijk)-b21(ijk)) + c1*(b20(ijk)-a21(ijk)) |
---|
| 1944 | c(jf+j) = c5*(a20(ijk)+b21(ijk)) - s5*(b20(ijk)+a21(ijk)) |
---|
| 1945 | d(jf+j) = s5*(a20(ijk)+b21(ijk)) + c5*(b20(ijk)+a21(ijk)) |
---|
| 1946 | |
---|
| 1947 | i = i + inc3 |
---|
| 1948 | j = j + inc4 |
---|
| 1949 | END DO |
---|
| 1950 | ibase = ibase + inc1 |
---|
| 1951 | jbase = jbase + inc2 |
---|
| 1952 | END DO |
---|
| 1953 | ia = ia + iink |
---|
| 1954 | ib = ib + iink |
---|
| 1955 | ic = ic + iink |
---|
| 1956 | id = id - iink |
---|
| 1957 | ie = ie - iink |
---|
| 1958 | if = if - iink |
---|
| 1959 | jbase = jbase + jump |
---|
| 1960 | END DO |
---|
| 1961 | IF (ic>id) GO TO 170 |
---|
| 1962 | 140 CONTINUE |
---|
| 1963 | ibase = 0 |
---|
| 1964 | DO l = 1, la |
---|
| 1965 | i = ibase |
---|
| 1966 | j = jbase |
---|
| 1967 | !DIR$ IVDEP |
---|
| 1968 | !CDIR NODEP |
---|
| 1969 | !OCL NOVREC |
---|
| 1970 | DO ijk = 1, lot |
---|
| 1971 | c(ja+j) = a(ib+i) + (a(ia+i)+a(ic+i)) |
---|
| 1972 | c(jd+j) = b(ib+i) - (b(ia+i)+b(ic+i)) |
---|
[1342] | 1973 | c(jb+j) = (sin60*(a(ia+i)-a(ic+i))) - (0.5_wp*(b(ia+i)+b(ic+i))+b(ib+i)) |
---|
| 1974 | c(jf+j) = -(sin60*(a(ia+i)-a(ic+i))) - (0.5_wp*(b(ia+i)+b(ic+i))+b(ib+i)) |
---|
| 1975 | c(jc+j) = sin60*(b(ic+i)-b(ia+i)) + (0.5_wp*(a(ia+i)+a(ic+i))-a(ib+i)) |
---|
| 1976 | c(je+j) = sin60*(b(ic+i)-b(ia+i)) - (0.5_wp*(a(ia+i)+a(ic+i))-a(ib+i)) |
---|
[1] | 1977 | i = i + inc3 |
---|
| 1978 | j = j + inc4 |
---|
| 1979 | END DO |
---|
| 1980 | ibase = ibase + inc1 |
---|
| 1981 | jbase = jbase + inc2 |
---|
| 1982 | END DO |
---|
| 1983 | |
---|
| 1984 | GO TO 170 |
---|
| 1985 | 150 CONTINUE |
---|
[1342] | 1986 | ssin60 = 2.0_wp*sin60 |
---|
[1] | 1987 | DO l = 1, la |
---|
| 1988 | i = ibase |
---|
| 1989 | j = jbase |
---|
| 1990 | !DIR$ IVDEP |
---|
| 1991 | !CDIR NODEP |
---|
| 1992 | !OCL NOVREC |
---|
| 1993 | DO ijk = 1, lot |
---|
[1342] | 1994 | c(ja+j) = (2.0_wp*(a(ia+i)+a(id+i))) + (2.0_wp*(a(ib+i)+a(ic+i))) |
---|
| 1995 | c(jd+j) = (2.0_wp*(a(ia+i)-a(id+i))) - (2.0_wp*(a(ib+i)-a(ic+i))) |
---|
| 1996 | c(jb+j) = (2.0_wp*(a(ia+i)-a(id+i))+(a(ib+i)-a(ic+i))) - (ssin60*(b(ib+ & |
---|
[1] | 1997 | & i)+b(ic+i))) |
---|
[1342] | 1998 | c(jf+j) = (2.0_wp*(a(ia+i)-a(id+i))+(a(ib+i)-a(ic+i))) + (ssin60*(b(ib+ & |
---|
[1] | 1999 | & i)+b(ic+i))) |
---|
[1342] | 2000 | c(jc+j) = (2.0_wp*(a(ia+i)+a(id+i))-(a(ib+i)+a(ic+i))) - (ssin60*(b(ib+ & |
---|
[1] | 2001 | & i)-b(ic+i))) |
---|
[1342] | 2002 | c(je+j) = (2.0_wp*(a(ia+i)+a(id+i))-(a(ib+i)+a(ic+i))) + (ssin60*(b(ib+ & |
---|
[1] | 2003 | & i)-b(ic+i))) |
---|
| 2004 | i = i + inc3 |
---|
| 2005 | j = j + inc4 |
---|
| 2006 | END DO |
---|
| 2007 | ibase = ibase + inc1 |
---|
| 2008 | jbase = jbase + inc2 |
---|
| 2009 | END DO |
---|
| 2010 | GO TO 170 |
---|
| 2011 | |
---|
| 2012 | ! Coding for factor 8 |
---|
| 2013 | |
---|
| 2014 | 160 CONTINUE |
---|
| 2015 | ibad = 3 |
---|
| 2016 | IF (la/=m) GO TO 180 |
---|
| 2017 | ia = 1 |
---|
| 2018 | ib = ia + la*inc1 |
---|
| 2019 | ic = ib + 2*la*inc1 |
---|
| 2020 | id = ic + 2*la*inc1 |
---|
| 2021 | ie = id + 2*la*inc1 |
---|
| 2022 | ja = 1 |
---|
| 2023 | jb = ja + jink |
---|
| 2024 | jc = jb + jink |
---|
| 2025 | jd = jc + jink |
---|
| 2026 | je = jd + jink |
---|
| 2027 | jf = je + jink |
---|
| 2028 | jg = jf + jink |
---|
| 2029 | jh = jg + jink |
---|
[1320] | 2030 | ssin45 = SQRT(2.0_wp) |
---|
[1] | 2031 | |
---|
| 2032 | DO l = 1, la |
---|
| 2033 | i = ibase |
---|
| 2034 | j = jbase |
---|
| 2035 | !DIR$ IVDEP |
---|
| 2036 | !CDIR NODEP |
---|
| 2037 | !OCL NOVREC |
---|
| 2038 | DO ijk = 1, lot |
---|
[1342] | 2039 | c(ja+j) = 2.0_wp*(((a(ia+i)+a(ie+i))+a(ic+i))+(a(ib+i)+a(id+i))) |
---|
| 2040 | c(je+j) = 2.0_wp*(((a(ia+i)+a(ie+i))+a(ic+i))-(a(ib+i)+a(id+i))) |
---|
| 2041 | c(jc+j) = 2.0_wp*(((a(ia+i)+a(ie+i))-a(ic+i))-(b(ib+i)-b(id+i))) |
---|
| 2042 | c(jg+j) = 2.0_wp*(((a(ia+i)+a(ie+i))-a(ic+i))+(b(ib+i)-b(id+i))) |
---|
| 2043 | c(jb+j) = 2.0_wp*((a(ia+i)-a(ie+i))-b(ic+i)) + ssin45*((a(ib+i)-a(id+ & |
---|
| 2044 | & i))-(b(ib+i)+b(id+i))) |
---|
| 2045 | c(jf+j) = 2.0_wp*((a(ia+i)-a(ie+i))-b(ic+i)) - ssin45*((a(ib+i)-a(id+ & |
---|
| 2046 | & i))-(b(ib+i)+b(id+i))) |
---|
| 2047 | c(jd+j) = 2.0_wp*((a(ia+i)-a(ie+i))+b(ic+i)) - ssin45*((a(ib+i)-a(id+ & |
---|
| 2048 | & i))+(b(ib+i)+b(id+i))) |
---|
| 2049 | c(jh+j) = 2.0_wp*((a(ia+i)-a(ie+i))+b(ic+i)) + ssin45*((a(ib+i)-a(id+ & |
---|
| 2050 | & i))+(b(ib+i)+b(id+i))) |
---|
[1] | 2051 | i = i + inc3 |
---|
| 2052 | j = j + inc4 |
---|
| 2053 | END DO |
---|
| 2054 | ibase = ibase + inc1 |
---|
| 2055 | jbase = jbase + inc2 |
---|
| 2056 | END DO |
---|
| 2057 | |
---|
| 2058 | ! Return |
---|
| 2059 | |
---|
| 2060 | 170 CONTINUE |
---|
| 2061 | ibad = 0 |
---|
| 2062 | 180 CONTINUE |
---|
| 2063 | ierr = ibad |
---|
| 2064 | RETURN |
---|
| 2065 | END SUBROUTINE rpassm |
---|
| 2066 | |
---|
| 2067 | SUBROUTINE set99(trigs,ifax,n) |
---|
| 2068 | |
---|
| 2069 | ! Description: |
---|
| 2070 | ! |
---|
| 2071 | ! Computes factors of n & trigonometric functins required by fft99 & fft991cy |
---|
| 2072 | ! |
---|
| 2073 | ! Method: |
---|
| 2074 | ! |
---|
| 2075 | ! Dimension trigs(n),ifax(1),jfax(10),lfax(7) |
---|
| 2076 | ! |
---|
| 2077 | ! subroutine 'set99' - computes factors of n & trigonometric |
---|
| 2078 | ! functins required by fft99 & fft991cy |
---|
| 2079 | |
---|
| 2080 | |
---|
[1320] | 2081 | USE control_parameters, & |
---|
| 2082 | ONLY: message_string |
---|
[1] | 2083 | |
---|
[1320] | 2084 | USE kinds |
---|
| 2085 | |
---|
[1] | 2086 | IMPLICIT NONE |
---|
| 2087 | |
---|
| 2088 | ! Scalar arguments |
---|
[1320] | 2089 | INTEGER(iwp) :: n !: |
---|
[1] | 2090 | |
---|
| 2091 | ! Array arguments |
---|
[1320] | 2092 | INTEGER(iwp) :: ifax(*) !: |
---|
| 2093 | REAL(wp) :: trigs(*) !: |
---|
[1] | 2094 | |
---|
[1320] | 2095 | |
---|
[1] | 2096 | ! Local scalars: |
---|
[1320] | 2097 | REAL(wp) :: angle !: |
---|
| 2098 | REAL(wp) :: del !: |
---|
| 2099 | INTEGER(iwp) :: i !: |
---|
| 2100 | INTEGER(iwp) :: ifac !: |
---|
| 2101 | INTEGER(iwp) :: ixxx !: |
---|
| 2102 | INTEGER(iwp) :: k !: |
---|
| 2103 | INTEGER(iwp) :: l !: |
---|
| 2104 | INTEGER(iwp) :: nfax !: |
---|
| 2105 | INTEGER(iwp) :: nhl !: |
---|
| 2106 | INTEGER(iwp) :: nil !: |
---|
| 2107 | INTEGER(iwp) :: nu !: |
---|
[1] | 2108 | |
---|
| 2109 | ! Local arrays: |
---|
[1320] | 2110 | INTEGER(iwp) :: jfax(10) !: |
---|
| 2111 | INTEGER(iwp) :: lfax(7) !: |
---|
[1] | 2112 | |
---|
| 2113 | ! Intrinsic functions |
---|
[1320] | 2114 | ! INTRINSIC ASIN, COS, MOD, REAL, SIN |
---|
[1] | 2115 | |
---|
| 2116 | ! Data statements |
---|
| 2117 | DATA lfax/6, 8, 5, 4, 3, 2, 1/ |
---|
| 2118 | |
---|
| 2119 | |
---|
| 2120 | ! Executable statements |
---|
| 2121 | ixxx = 1 |
---|
| 2122 | |
---|
[1342] | 2123 | del = 4.0_wp*ASIN(1.0_wp)/REAL(n,KIND=wp) |
---|
[1] | 2124 | nil = 0 |
---|
| 2125 | nhl = (n/2) - 1 |
---|
| 2126 | DO k = nil, nhl |
---|
[1342] | 2127 | angle = REAL(k,KIND=wp)*del |
---|
[1] | 2128 | trigs(2*k+1) = COS(angle) |
---|
| 2129 | trigs(2*k+2) = SIN(angle) |
---|
| 2130 | END DO |
---|
| 2131 | |
---|
| 2132 | ! Find factors of n (8,6,5,4,3,2; only one 8 allowed) |
---|
| 2133 | ! Look for sixes first, store factors in descending order |
---|
| 2134 | nu = n |
---|
| 2135 | ifac = 6 |
---|
| 2136 | k = 0 |
---|
| 2137 | l = 1 |
---|
| 2138 | 10 CONTINUE |
---|
| 2139 | IF (MOD(nu,ifac)/=0) GO TO 30 |
---|
| 2140 | k = k + 1 |
---|
| 2141 | jfax(k) = ifac |
---|
| 2142 | IF (ifac/=8) GO TO 20 |
---|
| 2143 | IF (k==1) GO TO 20 |
---|
| 2144 | jfax(1) = 8 |
---|
| 2145 | jfax(k) = 6 |
---|
| 2146 | 20 CONTINUE |
---|
| 2147 | nu = nu/ifac |
---|
| 2148 | IF (nu==1) GO TO 40 |
---|
| 2149 | IF (ifac/=8) GO TO 10 |
---|
| 2150 | 30 CONTINUE |
---|
| 2151 | l = l + 1 |
---|
| 2152 | ifac = lfax(l) |
---|
| 2153 | IF (ifac>1) GO TO 10 |
---|
| 2154 | |
---|
| 2155 | ! WRITE (nout,'(A,I4,A)') ' n =',n,' - Contains illegal factors' |
---|
[258] | 2156 | message_string = 'number of gridpoints along x or/and y ' // & |
---|
| 2157 | 'contain illegal factors' // & |
---|
| 2158 | '&only factors 8,6,5,4,3,2 are allowed' |
---|
| 2159 | CALL message( 'temperton_fft', 'PA0311', 1, 2, 0, 6, 0 ) |
---|
[1] | 2160 | |
---|
| 2161 | RETURN |
---|
| 2162 | |
---|
| 2163 | ! Now reverse order of factors |
---|
| 2164 | 40 CONTINUE |
---|
| 2165 | nfax = k |
---|
| 2166 | ifax(1) = nfax |
---|
| 2167 | DO i = 1, nfax |
---|
| 2168 | ifax(nfax+2-i) = jfax(i) |
---|
| 2169 | END DO |
---|
| 2170 | ifax(10) = n |
---|
| 2171 | RETURN |
---|
| 2172 | END SUBROUTINE set99 |
---|
| 2173 | |
---|
| 2174 | END MODULE temperton_fft |
---|