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program unsigned_test
implicit none
! 4 byte unsigned int
type(unsigned) :: x
integer(kind=4) :: y
integer :: i
x = 1
y = 1
do i = 1, 30
x = x * _lfortran_unsigned(2)
y = y * 2
if ( x < _lfortran_unsigned(0) ) error stop
if ( y < 0 ) error stop
end do
x = x * _lfortran_unsigned(2)
y = y * 2
if ( x < _lfortran_unsigned(0) ) error stop
if ( y > 0 ) error stop
x = x * _lfortran_unsigned(2)
y = y * 2
if ( x /= _lfortran_unsigned(0) ) error stop
if ( y /= 0 ) error stop
end program unsigned_test
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