mirror of https://gitlab.com/QEF/q-e.git
35 lines
927 B
Fortran
35 lines
927 B
Fortran
!
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! Copyright (C) 2001 PWSCF group
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! This file is distributed under the terms of the
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! GNU General Public License. See the file `License'
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! in the root directory of the present distribution,
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! or http://www.gnu.org/copyleft/gpl.txt .
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!
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subroutine vpack (ndim, ndimx, nspin, vin, vout, iflag)
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USE kinds
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implicit none
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integer :: ndim, ndimx, nspin, iflag, n
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real(DP) :: vin (ndimx * nspin), vout (ndimx * nspin)
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if (nspin.eq.1.or.ndim.eq.ndimx) return
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if (iflag.eq.1) then
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do n = 1, ndim
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vin (n + ndim) = vin (n + ndimx)
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vout (n + ndim) = vout (n + ndimx)
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enddo
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elseif (iflag.eq. - 1) then
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do n = ndim, 1, - 1
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vin (n + ndimx) = vin (n + ndim)
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vout (n + ndimx) = vout (n + ndim)
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enddo
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do n = ndim + 1, ndimx
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vin (n) = 0.d0
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vout (n) = 0.d0
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enddo
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else
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call errore ('vpack', ' wrong flag ', 1)
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endif
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return
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end subroutine vpack
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