87 lines
1.8 KiB
Fortran
87 lines
1.8 KiB
Fortran
!DIR$ attributes forceinline :: transpose
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recursive subroutine transpose(A,LDA,B,LDB,d1,d2)
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implicit none
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BEGIN_DOC
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! Transpose input matrix A into output matrix B
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END_DOC
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integer, intent(in) :: d1, d2, LDA, LDB
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real, intent(in) :: A(LDA,d2)
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real, intent(out) :: B(LDB,d1)
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integer :: i,j,k
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if ( d2 < 32 ) then
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do j=1,d1
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!DIR$ LOOP COUNT (16)
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do i=1,d2
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B(i,j ) = A(j ,i)
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enddo
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enddo
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return
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else if (d1 > d2) then
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!DIR$ forceinline
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k=d1/2
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!DIR$ forceinline recursive
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call transpose(A(1,1),LDA,B(1,1),LDB,k,d2)
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!DIR$ forceinline recursive
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call transpose(A(k+1,1),LDA,B(1,k+1),LDB,d1-k,d2)
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return
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else
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!DIR$ forceinline
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k=d2/2
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!DIR$ forceinline recursive
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call transpose(A(1,k+1),LDA,B(k+1,1),LDB,d1,d2-k)
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!DIR$ forceinline recursive
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call transpose(A(1,1),LDA,B(1,1),LDB,d1,k)
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return
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endif
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end
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!DIR$ attributes forceinline :: dtranspose
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recursive subroutine dtranspose(A,LDA,B,LDB,d1,d2)
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implicit none
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BEGIN_DOC
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! Transpose input matrix A into output matrix B
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END_DOC
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integer, intent(in) :: d1, d2, LDA, LDB
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double precision, intent(in) :: A(LDA,d2)
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double precision, intent(out) :: B(LDB,d1)
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! do j=1,d1
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! do i=1,d2
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! B(i,j ) = A(j ,i)
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! enddo
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! enddo
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! return
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integer :: i,j,k
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if ( d2 < 32 ) then
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do j=1,d1
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!DIR$ LOOP COUNT (16)
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do i=1,d2
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B(i,j ) = A(j ,i)
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enddo
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enddo
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return
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else if (d1 > d2) then
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!DIR$ forceinline
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k=d1/2
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!DIR$ forceinline recursive
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call dtranspose(A(1,1),LDA,B(1,1),LDB,k,d2)
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!DIR$ forceinline recursive
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call dtranspose(A(k+1,1),LDA,B(1,k+1),LDB,d1-k,d2)
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return
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else
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!DIR$ forceinline
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k=d2/2
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!DIR$ forceinline recursive
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call dtranspose(A(1,k+1),LDA,B(k+1,1),LDB,d1,d2-k)
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!DIR$ forceinline recursive
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call dtranspose(A(1,1),LDA,B(1,1),LDB,d1,k)
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return
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endif
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end
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