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59 lines
1.1 KiB
Fortran
59 lines
1.1 KiB
Fortran
! @@name: udr.4.f90
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! @@type: F-free
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! @@compilable: yes
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! @@linkable: yes
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! @@expect: success
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module data_red
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! Declare data type.
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type dt
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real :: r1
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real :: r2
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end type
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! Declare the user-defined operator .add.
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interface operator(.add.)
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module procedure addc
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end interface
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! Declare the user-defined reduction operator .add.
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!$omp declare reduction(.add.:dt:omp_out=omp_out.add.omp_in) &
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!$omp& initializer(dt_init(omp_priv))
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contains
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! Declare the initialization routine.
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subroutine dt_init(u)
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type(dt) :: u
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u%r1 = 0.0
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u%r2 = 0.0
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end subroutine
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! Declare the specific procedure for the .add. operator.
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function addc(x1, x2) result(xresult)
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type(dt), intent(in) :: x1, x2
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type(dt) :: xresult
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xresult%r1 = x1%r1 + x2%r2
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xresult%r2 = x1%r2 + x2%r1
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end function
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end module data_red
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program main
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use data_red, only : dt, dt_init, operator(.add.)
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type(dt) :: xdt1, xdt2
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integer :: i
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xdt1 = dt(1.0,2.0)
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xdt2 = dt(2.0,3.0)
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! The reduction operation
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!$omp parallel do reduction(.add.: xdt1)
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do i = 1, 10
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xdt1 = xdt1 .add. xdt2
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end do
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!$omp end parallel do
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print *, xdt1
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end program
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