quantum-espresso/CPV/main_loops.f90

57 lines
1.3 KiB
Fortran

!
! Copyright (C) 2002-2005 Quantum ESPRESSO group
! This file is distributed under the terms of the
! GNU General Public License. See the file `License'
! in the root directory of the present distribution,
! or http://www.gnu.org/copyleft/gpl.txt .
!
! ... This file contains "sub-main" subroutines that drive the different
! ... kinds of "meta"/"non-meta" dynamics
!
! ... set ion_positions = 'from_input' and rd_pos = +your_positions+
! ... to force cprmain to compute forces for +your_position+ configuration
!
!----------------------------------------------------------------------------
SUBROUTINE cpr_loop( nloop )
!----------------------------------------------------------------------------
!
USE kinds, ONLY : DP
USE ions_base, ONLY : nat
!
IMPLICIT NONE
!
INTEGER, INTENT(IN) :: nloop
!
INTEGER :: iloop
REAL(DP), ALLOCATABLE :: tau(:,:)
REAL(DP), ALLOCATABLE :: fion(:,:)
REAL(DP) :: etot
!
!
IF ( nat > 0 ) THEN
!
ALLOCATE( tau( 3, nat ) )
ALLOCATE( fion( 3, nat ) )
!
ELSE
!
CALL errore( ' cpr_loop ', ' nat less or equal 0 ', 1 )
!
END IF
!
CALL init_run()
!
DO iloop = 1, nloop
!
CALL cprmain( tau, fion, etot )
!
END DO
!
CALL terminate_run()
!
DEALLOCATE( tau, fion )
!
RETURN
!
END SUBROUTINE cpr_loop