67 lines
1.8 KiB
Fortran
67 lines
1.8 KiB
Fortran
! { dg-do run }
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! PR 34566 - logical matmul used to give the wrong result.
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! We check this by running through every permutation in
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! multiplying two 3*3 matrices, and all permutations of multiplying
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! a 3-vector and a 3*3 matrices and checking against equivalence
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! with integer matrix multiply.
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program main
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implicit none
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integer, parameter :: ki=4
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integer, parameter :: dimen=3
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integer :: i, j, k
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real, dimension(dimen,dimen) :: r1, r2
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integer, dimension(dimen,dimen) :: m1, m2
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logical(kind=ki), dimension(dimen,dimen) :: l1, l2
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logical(kind=ki), dimension(dimen*dimen) :: laux
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logical(kind=ki), dimension(dimen) :: lv
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integer, dimension(dimen) :: iv
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do i=0,2**(dimen*dimen)-1
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forall (k=1:dimen*dimen)
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laux(k) = btest(i, k-1)
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end forall
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l1 = reshape(laux,shape(l1))
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m1 = ltoi(l1)
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! Check matrix*matrix multiply
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do j=0,2**(dimen*dimen)-1
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forall (k=1:dimen*dimen)
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laux(k) = btest(i, k-1)
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end forall
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l2 = reshape(laux,shape(l2))
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m2 = ltoi(l2)
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if (any(matmul(l1,l2) .neqv. (matmul(m1,m2) /= 0))) then
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call abort
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end if
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end do
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! Check vector*matrix and matrix*vector multiply.
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do j=0,2**dimen-1
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forall (k=1:dimen)
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lv(k) = btest(j, k-1)
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end forall
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iv = ltoi(lv)
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if (any(matmul(lv,l1) .neqv. (matmul(iv,m1) /=0))) then
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call abort
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end if
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if (any(matmul(l1,lv) .neqv. (matmul(m1,iv) /= 0))) then
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call abort
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end if
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end do
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end do
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contains
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elemental function ltoi(v)
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implicit none
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integer :: ltoi
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real :: rtoi
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logical(kind=4), intent(in) :: v
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if (v) then
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ltoi = 1
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else
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ltoi = 0
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end if
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end function ltoi
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end program main
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