mirror of https://github.com/pfloos/quack
80 lines
1.7 KiB
Fortran
80 lines
1.7 KiB
Fortran
subroutine form_v(nC,nO,nV,nR,X1,X2,X3,X4,t2,v)
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! Form quadratic array in CCD
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implicit none
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! Input variables
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integer,intent(in) :: nC,nO,nV,nR
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double precision,intent(in) :: t2(nO-nC,nO-nC,nV-nR,nV-nR)
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double precision,intent(in) :: X1(nO-nC,nO-nC,nO-nC,nO-nC)
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double precision,intent(in) :: X2(nV-nR,nV-nR)
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double precision,intent(in) :: X3(nO-nC,nO-nC)
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double precision,intent(in) :: X4(nO-nC,nO-nC,nV-nR,nV-nR)
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! Local variables
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integer :: i,j,k,l
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integer :: a,b,c,d
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! Output variables
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double precision,intent(out) :: v(nO-nC,nO-nC,nV-nR,nV-nR)
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v(:,:,:,:) = 0d0
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do i=1,nO-nC
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do j=1,nO-nC
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do a=1,nV-nR
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do b=1,nV-nR
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do k=1,nO-nC
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do l=1,nO-nC
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v(i,j,a,b) = v(i,j,a,b) + 0.25d0*X1(k,l,i,j)*t2(k,l,a,b)
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end do
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end do
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end do
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end do
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end do
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end do
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do i=1,nO-nC
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do j=1,nO-nC
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do a=1,nV-nR
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do b=1,nV-nR
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do c=1,nV-nR
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v(i,j,a,b) = v(i,j,a,b) - 0.5d0*(X2(b,c)*t2(i,j,a,c) + X2(a,c)*t2(i,j,c,b))
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end do
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end do
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end do
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end do
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end do
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do i=1,nO-nC
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do j=1,nO-nC
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do a=1,nV-nR
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do b=1,nV-nR
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do k=1,nO-nC
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v(i,j,a,b) = v(i,j,a,b) - 0.5d0*(X3(k,j)*t2(i,k,a,b) + X3(k,i)*t2(k,j,a,b))
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end do
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end do
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end do
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end do
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end do
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do i=1,nO-nC
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do j=1,nO-nC
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do a=1,nV-nR
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do b=1,nV-nR
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do k=1,nO-nC
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do c=1,nV-nR
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v(i,j,a,b) = v(i,j,a,b) + (X4(i,k,a,c)*t2(j,k,b,c) + X4(i,k,b,c)*t2(k,j,a,c))
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end do
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end do
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end do
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end do
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end do
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end do
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end subroutine
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