+++ /dev/null
-c---------------------------------------------------------------------
-c---------------------------------------------------------------------
-
- subroutine blts ( ldmx, ldmy, ldmz,
- > nx, ny, nz, k,
- > omega,
- > v,
- > ldz, ldy, ldx, d,
- > ist, iend, jst, jend,
- > nx0, ny0, ipt, jpt)
-
-c---------------------------------------------------------------------
-c---------------------------------------------------------------------
-
-c---------------------------------------------------------------------
-c
-c compute the regular-sparse, block lower triangular solution:
-c
-c v <-- ( L-inv ) * v
-c
-c---------------------------------------------------------------------
-
- implicit none
-
-c---------------------------------------------------------------------
-c input parameters
-c---------------------------------------------------------------------
- integer ldmx, ldmy, ldmz
- integer nx, ny, nz
- integer k
- double precision omega
- double precision v( 5, -1:ldmx+2, -1:ldmy+2, *),
- > ldz( 5, 5, ldmx, ldmy),
- > ldy( 5, 5, ldmx, ldmy),
- > ldx( 5, 5, ldmx, ldmy),
- > d( 5, 5, ldmx, ldmy)
- integer ist, iend
- integer jst, jend
- integer nx0, ny0
- integer ipt, jpt
-
-c---------------------------------------------------------------------
-c local variables
-c---------------------------------------------------------------------
- integer i, j, m
- integer iex
- double precision tmp, tmp1
- double precision tmat(5,5)
-
-
-c---------------------------------------------------------------------
-c receive data from north and west
-c---------------------------------------------------------------------
- iex = 0
- call exchange_1( v,k,iex )
-
-
- do j = jst, jend
- do i = ist, iend
- do m = 1, 5
-
- v( m, i, j, k ) = v( m, i, j, k )
- > - omega * ( ldz( m, 1, i, j ) * v( 1, i, j, k-1 )
- > + ldz( m, 2, i, j ) * v( 2, i, j, k-1 )
- > + ldz( m, 3, i, j ) * v( 3, i, j, k-1 )
- > + ldz( m, 4, i, j ) * v( 4, i, j, k-1 )
- > + ldz( m, 5, i, j ) * v( 5, i, j, k-1 ) )
-
- end do
- end do
- end do
-
-
- do j=jst,jend
- do i = ist, iend
-
- do m = 1, 5
-
- v( m, i, j, k ) = v( m, i, j, k )
- > - omega * ( ldy( m, 1, i, j ) * v( 1, i, j-1, k )
- > + ldx( m, 1, i, j ) * v( 1, i-1, j, k )
- > + ldy( m, 2, i, j ) * v( 2, i, j-1, k )
- > + ldx( m, 2, i, j ) * v( 2, i-1, j, k )
- > + ldy( m, 3, i, j ) * v( 3, i, j-1, k )
- > + ldx( m, 3, i, j ) * v( 3, i-1, j, k )
- > + ldy( m, 4, i, j ) * v( 4, i, j-1, k )
- > + ldx( m, 4, i, j ) * v( 4, i-1, j, k )
- > + ldy( m, 5, i, j ) * v( 5, i, j-1, k )
- > + ldx( m, 5, i, j ) * v( 5, i-1, j, k ) )
-
- end do
-
-c---------------------------------------------------------------------
-c diagonal block inversion
-c
-c forward elimination
-c---------------------------------------------------------------------
- do m = 1, 5
- tmat( m, 1 ) = d( m, 1, i, j )
- tmat( m, 2 ) = d( m, 2, i, j )
- tmat( m, 3 ) = d( m, 3, i, j )
- tmat( m, 4 ) = d( m, 4, i, j )
- tmat( m, 5 ) = d( m, 5, i, j )
- end do
-
- tmp1 = 1.0d+00 / tmat( 1, 1 )
- tmp = tmp1 * tmat( 2, 1 )
- tmat( 2, 2 ) = tmat( 2, 2 )
- > - tmp * tmat( 1, 2 )
- tmat( 2, 3 ) = tmat( 2, 3 )
- > - tmp * tmat( 1, 3 )
- tmat( 2, 4 ) = tmat( 2, 4 )
- > - tmp * tmat( 1, 4 )
- tmat( 2, 5 ) = tmat( 2, 5 )
- > - tmp * tmat( 1, 5 )
- v( 2, i, j, k ) = v( 2, i, j, k )
- > - v( 1, i, j, k ) * tmp
-
- tmp = tmp1 * tmat( 3, 1 )
- tmat( 3, 2 ) = tmat( 3, 2 )
- > - tmp * tmat( 1, 2 )
- tmat( 3, 3 ) = tmat( 3, 3 )
- > - tmp * tmat( 1, 3 )
- tmat( 3, 4 ) = tmat( 3, 4 )
- > - tmp * tmat( 1, 4 )
- tmat( 3, 5 ) = tmat( 3, 5 )
- > - tmp * tmat( 1, 5 )
- v( 3, i, j, k ) = v( 3, i, j, k )
- > - v( 1, i, j, k ) * tmp
-
- tmp = tmp1 * tmat( 4, 1 )
- tmat( 4, 2 ) = tmat( 4, 2 )
- > - tmp * tmat( 1, 2 )
- tmat( 4, 3 ) = tmat( 4, 3 )
- > - tmp * tmat( 1, 3 )
- tmat( 4, 4 ) = tmat( 4, 4 )
- > - tmp * tmat( 1, 4 )
- tmat( 4, 5 ) = tmat( 4, 5 )
- > - tmp * tmat( 1, 5 )
- v( 4, i, j, k ) = v( 4, i, j, k )
- > - v( 1, i, j, k ) * tmp
-
- tmp = tmp1 * tmat( 5, 1 )
- tmat( 5, 2 ) = tmat( 5, 2 )
- > - tmp * tmat( 1, 2 )
- tmat( 5, 3 ) = tmat( 5, 3 )
- > - tmp * tmat( 1, 3 )
- tmat( 5, 4 ) = tmat( 5, 4 )
- > - tmp * tmat( 1, 4 )
- tmat( 5, 5 ) = tmat( 5, 5 )
- > - tmp * tmat( 1, 5 )
- v( 5, i, j, k ) = v( 5, i, j, k )
- > - v( 1, i, j, k ) * tmp
-
-
-
- tmp1 = 1.0d+00 / tmat( 2, 2 )
- tmp = tmp1 * tmat( 3, 2 )
- tmat( 3, 3 ) = tmat( 3, 3 )
- > - tmp * tmat( 2, 3 )
- tmat( 3, 4 ) = tmat( 3, 4 )
- > - tmp * tmat( 2, 4 )
- tmat( 3, 5 ) = tmat( 3, 5 )
- > - tmp * tmat( 2, 5 )
- v( 3, i, j, k ) = v( 3, i, j, k )
- > - v( 2, i, j, k ) * tmp
-
- tmp = tmp1 * tmat( 4, 2 )
- tmat( 4, 3 ) = tmat( 4, 3 )
- > - tmp * tmat( 2, 3 )
- tmat( 4, 4 ) = tmat( 4, 4 )
- > - tmp * tmat( 2, 4 )
- tmat( 4, 5 ) = tmat( 4, 5 )
- > - tmp * tmat( 2, 5 )
- v( 4, i, j, k ) = v( 4, i, j, k )
- > - v( 2, i, j, k ) * tmp
-
- tmp = tmp1 * tmat( 5, 2 )
- tmat( 5, 3 ) = tmat( 5, 3 )
- > - tmp * tmat( 2, 3 )
- tmat( 5, 4 ) = tmat( 5, 4 )
- > - tmp * tmat( 2, 4 )
- tmat( 5, 5 ) = tmat( 5, 5 )
- > - tmp * tmat( 2, 5 )
- v( 5, i, j, k ) = v( 5, i, j, k )
- > - v( 2, i, j, k ) * tmp
-
-
-
- tmp1 = 1.0d+00 / tmat( 3, 3 )
- tmp = tmp1 * tmat( 4, 3 )
- tmat( 4, 4 ) = tmat( 4, 4 )
- > - tmp * tmat( 3, 4 )
- tmat( 4, 5 ) = tmat( 4, 5 )
- > - tmp * tmat( 3, 5 )
- v( 4, i, j, k ) = v( 4, i, j, k )
- > - v( 3, i, j, k ) * tmp
-
- tmp = tmp1 * tmat( 5, 3 )
- tmat( 5, 4 ) = tmat( 5, 4 )
- > - tmp * tmat( 3, 4 )
- tmat( 5, 5 ) = tmat( 5, 5 )
- > - tmp * tmat( 3, 5 )
- v( 5, i, j, k ) = v( 5, i, j, k )
- > - v( 3, i, j, k ) * tmp
-
-
-
- tmp1 = 1.0d+00 / tmat( 4, 4 )
- tmp = tmp1 * tmat( 5, 4 )
- tmat( 5, 5 ) = tmat( 5, 5 )
- > - tmp * tmat( 4, 5 )
- v( 5, i, j, k ) = v( 5, i, j, k )
- > - v( 4, i, j, k ) * tmp
-
-c---------------------------------------------------------------------
-c back substitution
-c---------------------------------------------------------------------
- v( 5, i, j, k ) = v( 5, i, j, k )
- > / tmat( 5, 5 )
-
- v( 4, i, j, k ) = v( 4, i, j, k )
- > - tmat( 4, 5 ) * v( 5, i, j, k )
- v( 4, i, j, k ) = v( 4, i, j, k )
- > / tmat( 4, 4 )
-
- v( 3, i, j, k ) = v( 3, i, j, k )
- > - tmat( 3, 4 ) * v( 4, i, j, k )
- > - tmat( 3, 5 ) * v( 5, i, j, k )
- v( 3, i, j, k ) = v( 3, i, j, k )
- > / tmat( 3, 3 )
-
- v( 2, i, j, k ) = v( 2, i, j, k )
- > - tmat( 2, 3 ) * v( 3, i, j, k )
- > - tmat( 2, 4 ) * v( 4, i, j, k )
- > - tmat( 2, 5 ) * v( 5, i, j, k )
- v( 2, i, j, k ) = v( 2, i, j, k )
- > / tmat( 2, 2 )
-
- v( 1, i, j, k ) = v( 1, i, j, k )
- > - tmat( 1, 2 ) * v( 2, i, j, k )
- > - tmat( 1, 3 ) * v( 3, i, j, k )
- > - tmat( 1, 4 ) * v( 4, i, j, k )
- > - tmat( 1, 5 ) * v( 5, i, j, k )
- v( 1, i, j, k ) = v( 1, i, j, k )
- > / tmat( 1, 1 )
-
-
- enddo
- enddo
-
-c---------------------------------------------------------------------
-c send data to east and south
-c---------------------------------------------------------------------
- iex = 2
- call exchange_1( v,k,iex )
-
- return
- end
-
-
