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qp2/src/utils/transpose.irp.f

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2019-01-25 11:39:31 +01:00
!DIR$ attributes forceinline :: transpose
recursive subroutine transpose(A,LDA,B,LDB,d1,d2)
implicit none
BEGIN_DOC
! Transpose input matrix A into output matrix B
END_DOC
integer, intent(in) :: d1, d2, LDA, LDB
real, intent(in) :: A(LDA,d2)
real, intent(out) :: B(LDB,d1)
integer :: i,j,k
if ( d2 < 32 ) then
do j=1,d1
!DIR$ LOOP COUNT (16)
do i=1,d2
B(i,j ) = A(j ,i)
enddo
enddo
return
else if (d1 > d2) then
!DIR$ forceinline
k=d1/2
!DIR$ forceinline recursive
call transpose(A(1,1),LDA,B(1,1),LDB,k,d2)
!DIR$ forceinline recursive
call transpose(A(k+1,1),LDA,B(1,k+1),LDB,d1-k,d2)
return
else
!DIR$ forceinline
k=d2/2
!DIR$ forceinline recursive
call transpose(A(1,k+1),LDA,B(k+1,1),LDB,d1,d2-k)
!DIR$ forceinline recursive
call transpose(A(1,1),LDA,B(1,1),LDB,d1,k)
return
endif
end
!DIR$ attributes forceinline :: dtranspose
recursive subroutine dtranspose(A,LDA,B,LDB,d1,d2)
implicit none
BEGIN_DOC
! Transpose input matrix A into output matrix B
END_DOC
integer, intent(in) :: d1, d2, LDA, LDB
double precision, intent(in) :: A(LDA,d2)
double precision, intent(out) :: B(LDB,d1)
! do j=1,d1
! do i=1,d2
! B(i,j ) = A(j ,i)
! enddo
! enddo
! return
integer :: i,j,k
if ( d2 < 32 ) then
do j=1,d1
!DIR$ LOOP COUNT (16)
do i=1,d2
B(i,j ) = A(j ,i)
enddo
enddo
return
else if (d1 > d2) then
!DIR$ forceinline
k=d1/2
!DIR$ forceinline recursive
call dtranspose(A(1,1),LDA,B(1,1),LDB,k,d2)
!DIR$ forceinline recursive
call dtranspose(A(k+1,1),LDA,B(1,k+1),LDB,d1-k,d2)
return
else
!DIR$ forceinline
k=d2/2
!DIR$ forceinline recursive
call dtranspose(A(1,k+1),LDA,B(k+1,1),LDB,d1,d2-k)
!DIR$ forceinline recursive
call dtranspose(A(1,1),LDA,B(1,1),LDB,d1,k)
return
endif
end