| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| subroutine ninvr(c) |
| |
| c--------------------------------------------------------------------- |
| c--------------------------------------------------------------------- |
| |
| c--------------------------------------------------------------------- |
| c block-diagonal matrix-vector multiplication |
| c--------------------------------------------------------------------- |
| |
| include 'header.h' |
| |
| integer c, i, j, k |
| double precision r1, r2, r3, r4, r5, t1, t2 |
| |
| c--------------------------------------------------------------------- |
| c treat only one cell |
| c--------------------------------------------------------------------- |
| do k = start(3,c), cell_size(3,c)-end(3,c)-1 |
| do j = start(2,c), cell_size(2,c)-end(2,c)-1 |
| do i = start(1,c), cell_size(1,c)-end(1,c)-1 |
| |
| r1 = rhs(i,j,k,1,c) |
| r2 = rhs(i,j,k,2,c) |
| r3 = rhs(i,j,k,3,c) |
| r4 = rhs(i,j,k,4,c) |
| r5 = rhs(i,j,k,5,c) |
| |
| t1 = bt * r3 |
| t2 = 0.5d0 * ( r4 + r5 ) |
| |
| rhs(i,j,k,1,c) = -r2 |
| rhs(i,j,k,2,c) = r1 |
| rhs(i,j,k,3,c) = bt * ( r4 - r5 ) |
| rhs(i,j,k,4,c) = -t1 + t2 |
| rhs(i,j,k,5,c) = t1 + t2 |
| enddo |
| enddo |
| enddo |
| |
| return |
| end |
