1c96caaccSSatish Balay! 2c96caaccSSatish Balay! 3c96caaccSSatish Balay! Fortran kernel for sparse matrix-vector product in the AIJ/CRL format 4c96caaccSSatish Balay! 5c96caaccSSatish Balay#include <petsc/finclude/petscsys.h> 6c96caaccSSatish Balay! 7*0ccf82acSMartin Diehlpure subroutine FortranMultCRL(m,rmax,x,y,icols,acols) 8*0ccf82acSMartin Diehl implicit none (type, external) 9*0ccf82acSMartin Diehl PetscInt, intent(in) :: m,rmax,icols(m,rmax) 10*0ccf82acSMartin Diehl PetscScalar, intent(in) :: x(0:m-1), acols(m,rmax) 11*0ccf82acSMartin Diehl PetscScalar, intent(out) :: y(m) 12c96caaccSSatish Balay 13c96caaccSSatish Balay PetscInt i,j 14c96caaccSSatish Balay 150113e719SMartin Diehl do j=1,m 16c96caaccSSatish Balay y(j) = acols(j,1)*x(icols(j,1)) 170113e719SMartin Diehl end do 18c96caaccSSatish Balay 190113e719SMartin Diehl do i=2,rmax 200113e719SMartin Diehl do j=1,m 21c96caaccSSatish Balay y(j) = y(j) + acols(j,i)*x(icols(j,i)) 220113e719SMartin Diehl end do 230113e719SMartin Diehl end do 240113e719SMartin Diehlend subroutine FortranMultCRL 25