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! { dg-do run }
! Test CSHIFT with array argument for shift
module rnd
implicit none
contains
subroutine fill(a,n)
integer, intent(out), dimension(:,:) :: a
integer, intent(in) :: n
real, dimension(size(a,1),size(a,2)) :: r
call random_number(r)
a = int(2*n*r-n)
end subroutine fill
end module rnd
module csh
implicit none
contains
subroutine emul_cshift(a,sh_in,dim, c)
integer, dimension(:,:,:), intent(in) :: a
integer, dimension(:,:,:), intent(out) :: c
integer, dimension(:,:), intent(in) :: sh_in
integer, intent(in) :: dim
integer :: sh, rsh
integer :: s1, s2, s3, n, i
integer :: n1, n2, n3
n1 = size(a,1)
n2 = size(a,2)
n3 = size(a,3)
if (dim == 1) then
n = n1
do s2=1,n2
do s3=1,n3
sh = modulo(sh_in(s2,s3), n)
rsh = n - sh
do i=1,rsh
c(i,s2,s3) = a(i+sh,s2,s3)
end do
do i=rsh+1,n
c(i,s2,s3) = a(i-rsh,s2,s3)
end do
end do
end do
else if (dim == 2) then
n = n2
do s3=1,n3
do s1=1,n1
sh = modulo(sh_in(s1,s3),n)
rsh = n - sh
do i=1,rsh
c(s1,i,s3) = a(s1,i+sh,s3)
end do
do i=rsh+1,n
c(s1,i,s3) = a(s1,i-rsh,s3)
end do
end do
end do
else if (dim == 3) then
n = n3
do s2=1,n2
do s1=1,n1
sh = modulo(sh_in(s1,s2),n)
rsh = n - sh
do i=1,rsh
c(s1,s2,i) = a(s1,s2,i+sh)
end do
do i=rsh+1,n
c(s1,s2,i) = a(s1,s2,i-rsh)
end do
end do
end do
else
stop "Illegal dim"
end if
end subroutine emul_cshift
end module csh
program main
use csh
use rnd
implicit none
integer, parameter :: n1=30,n2=40,n3=50
integer, dimension(n1,n2,n3) :: a, b,c
integer :: s1, s2, s3
integer :: dim
integer, dimension(:,:), allocatable :: sh1, sh2, sh3
integer, dimension(:), allocatable :: sh_shift
integer :: sh, rsh
integer :: i,j,k,v
type t
integer :: i1, i2, i3
end type t
type(t), dimension(n1,n2,n3) :: ta, tb
v = 1
do k=1,n3
do j=1,n2
do i=1,n1
a(i,j,k) = v
v = v + 1
end do
end do
end do
ta%i1 = a
ta%i2 = a+a
ta%i3 = a+a+a
allocate(sh1(n2,n3))
allocate(sh2(n1,n3))
allocate(sh3(n1,n2))
call fill(sh1,10)
call fill(sh2,10)
call fill(sh3,10)
b = cshift(a,sh1,1)
call emul_cshift(a,sh1,1,c)
if (any(b /= c)) then
print *,b
print *,c
call abort
end if
tb = cshift(ta,sh1,1)
if (any(tb%i1 /= c)) call abort
b = cshift(a,sh2,2)
call emul_cshift(a,sh2,2,c)
if (any(b /= c)) call abort
tb = cshift(ta,sh2,2)
if (any (tb%i2 /= c*2)) call abort
b = cshift(a,sh3,3)
call emul_cshift(a,sh3,3,c)
if (any(b /= c)) call abort
tb = cshift(ta,sh3,3)
if (any(tb%i3 /= c*3)) call abort
b = -42
c = -42
b(1:n1:2,:,:) = cshift(a(1:n1/2,:,:),sh1,1)
call emul_cshift(a(1:n1/2,:,:), sh1, 1, c(1:n1:2,:,:))
if (any(b /= c)) call abort
tb%i1 = -42
tb%i2 = -2*42
tb%i3 = -3*42
tb(1:n1:2,:,:) = cshift(ta(1:n1/2,:,:),sh1,1)
if (any(tb%i1 /= b)) call abort
if (any(tb%i2 /= 2*b)) call abort
if (any(tb%i3 /= 3*b)) call abort
9000 format (99(3(I3,1X),2X))
end program main
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