| 1 |
guez |
121 |
module fxhyp_loop_ik_m |
| 2 |
|
|
|
| 3 |
|
|
implicit none |
| 4 |
|
|
|
| 5 |
|
|
INTEGER, PARAMETER:: nmax = 30000 |
| 6 |
|
|
|
| 7 |
|
|
contains |
| 8 |
|
|
|
| 9 |
guez |
127 |
subroutine fxhyp_loop_ik(xf, xtild, Xprimt, xlon, xprimm, xuv) |
| 10 |
guez |
121 |
|
| 11 |
|
|
use coefpoly_m, only: coefpoly |
| 12 |
|
|
USE dimens_m, ONLY: iim |
| 13 |
guez |
124 |
use nr_util, only: pi_d, twopi_d |
| 14 |
guez |
127 |
use serre, only: clon |
| 15 |
guez |
121 |
|
| 16 |
|
|
DOUBLE PRECISION, intent(in):: Xf(0:), xtild(0:), Xprimt(0:) ! (0:2 * nmax) |
| 17 |
guez |
124 |
real, intent(out):: xlon(:), xprimm(:) ! (iim) |
| 18 |
guez |
121 |
|
| 19 |
|
|
DOUBLE PRECISION, intent(in):: xuv |
| 20 |
|
|
! 0. si calcul aux points scalaires |
| 21 |
|
|
! 0.5 si calcul aux points U |
| 22 |
|
|
|
| 23 |
|
|
! Local: |
| 24 |
guez |
126 |
DOUBLE PRECISION xo1, Xfi, a0, a1, a2, a3, Xf1, Xprimin |
| 25 |
|
|
integer i, it, iter |
| 26 |
|
|
DOUBLE PRECISION, parameter:: my_eps = 1d-6 |
| 27 |
guez |
121 |
|
| 28 |
guez |
126 |
DOUBLE PRECISION xxprim(iim), xvrai(iim) |
| 29 |
|
|
! intermediary variables because xlon and xprimm are simple precision |
| 30 |
|
|
|
| 31 |
guez |
121 |
!------------------------------------------------------------------ |
| 32 |
|
|
|
| 33 |
guez |
126 |
DO i = 1, iim |
| 34 |
|
|
Xfi = - pi_d + (i + xuv - 0.75d0) * twopi_d / iim |
| 35 |
guez |
121 |
|
| 36 |
|
|
it = 2 * nmax |
| 37 |
|
|
do while (xfi < xf(it) .and. it >= 1) |
| 38 |
|
|
it = it - 1 |
| 39 |
|
|
end do |
| 40 |
|
|
|
| 41 |
guez |
126 |
! Calcul de Xf(xvrai(i)) |
| 42 |
guez |
121 |
|
| 43 |
guez |
126 |
xvrai(i) = xtild(it) |
| 44 |
guez |
121 |
|
| 45 |
|
|
IF (it == 2 * nmax) THEN |
| 46 |
|
|
it = 2 * nmax -1 |
| 47 |
|
|
END IF |
| 48 |
|
|
|
| 49 |
|
|
CALL coefpoly(Xf(it), Xf(it + 1), Xprimt(it), Xprimt(it + 1), & |
| 50 |
|
|
xtild(it), xtild(it + 1), a0, a1, a2, a3) |
| 51 |
|
|
Xf1 = Xf(it) |
| 52 |
guez |
126 |
Xprimin = a1 + xvrai(i) * (2d0 * a2 + xvrai(i) * 3d0 * a3) |
| 53 |
|
|
xo1 = xvrai(i) |
| 54 |
guez |
121 |
iter = 1 |
| 55 |
|
|
|
| 56 |
|
|
do |
| 57 |
guez |
126 |
xvrai(i) = xvrai(i) - (Xf1 - Xfi) / Xprimin |
| 58 |
|
|
IF (ABS(xvrai(i) - xo1) <= my_eps .or. iter == 300) exit |
| 59 |
|
|
xo1 = xvrai(i) |
| 60 |
|
|
Xf1 = a0 + xvrai(i) * (a1 + xvrai(i) * (a2 + xvrai(i) * a3)) |
| 61 |
|
|
Xprimin = a1 + xvrai(i) * (2d0 * a2 + xvrai(i) * 3d0 * a3) |
| 62 |
guez |
121 |
end DO |
| 63 |
|
|
|
| 64 |
guez |
126 |
if (ABS(xvrai(i) - xo1) > my_eps) then |
| 65 |
guez |
121 |
! iter == 300 |
| 66 |
|
|
print *, 'Pas de solution.' |
| 67 |
|
|
print *, i, xfi |
| 68 |
|
|
STOP 1 |
| 69 |
|
|
end if |
| 70 |
|
|
|
| 71 |
guez |
126 |
xxprim(i) = twopi_d / (iim * Xprimin) |
| 72 |
guez |
121 |
end DO |
| 73 |
|
|
|
| 74 |
|
|
DO i = 1, iim -1 |
| 75 |
|
|
IF (xvrai(i + 1) < xvrai(i)) THEN |
| 76 |
guez |
124 |
print *, 'xvrai(', i + 1, ') < xvrai(', i, ')' |
| 77 |
guez |
121 |
STOP 1 |
| 78 |
|
|
END IF |
| 79 |
|
|
END DO |
| 80 |
|
|
|
| 81 |
guez |
127 |
xlon = xvrai + clon |
| 82 |
guez |
126 |
xprimm = xxprim |
| 83 |
guez |
121 |
|
| 84 |
|
|
end subroutine fxhyp_loop_ik |
| 85 |
|
|
|
| 86 |
|
|
end module fxhyp_loop_ik_m |
Parent Directory
| 
Revision Log