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THE SOFTWARE. ! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! subroutine HIP_CHECK(stat) use iso_c_binding implicit none integer(c_int) :: stat if(stat /= 0) then write(*,*) 'Error: hip error' stop end if end subroutine HIP_CHECK subroutine ROCSPARSE_CHECK(stat) use iso_c_binding implicit none integer(c_int) :: stat if(stat /= 0) then write(*,*) 'Error: rocsparse error' stop end if end subroutine ROCSPARSE_CHECK program example_fortran_csrsm use iso_c_binding use rocsparse implicit none interface function hipMalloc(ptr, size) & bind(c, name = 'hipMalloc') use iso_c_binding implicit none integer :: hipMalloc type(c_ptr) :: ptr integer(c_size_t), value :: size end function hipMalloc function hipFree(ptr) & bind(c, name = 'hipFree') use iso_c_binding implicit none integer :: hipFree type(c_ptr), value :: ptr end function hipFree function hipMemcpy(dst, src, size, kind) & bind(c, name = 'hipMemcpy') use iso_c_binding implicit none integer :: hipMemcpy type(c_ptr), value :: dst type(c_ptr), intent(in), value :: src integer(c_size_t), value :: size integer(c_int), value :: kind end function hipMemcpy function hipMemset(dst, val, size) & bind(c, name = 'hipMemset') use iso_c_binding implicit none integer :: hipMemset type(c_ptr), value :: dst integer(c_int), value :: val integer(c_size_t), value :: size end function hipMemset function hipDeviceSynchronize() & bind(c, name = 'hipDeviceSynchronize') use iso_c_binding implicit none integer :: hipDeviceSynchronize end function hipDeviceSynchronize function hipDeviceReset() & bind(c, name = 'hipDeviceReset') use iso_c_binding implicit none integer :: hipDeviceReset end function hipDeviceReset end interface integer, target :: h_csr_row_ptr(4), h_csr_col_ind(6) real(8), target :: h_csr_val(6), h_B(12) type(c_ptr) :: d_csr_row_ptr type(c_ptr) :: d_csr_col_ind type(c_ptr) :: d_csr_val type(c_ptr) :: d_B type(c_ptr) :: temp_buffer integer :: i, j integer(c_int) :: M, N, nnz integer(c_int) :: ldb, nrhs integer(c_int) :: stat integer(c_int), target :: pivot integer(c_size_t), target :: buffer_size real(c_double), target :: alpha type(c_ptr) :: handle type(c_ptr) :: descr type(c_ptr) :: info integer :: version character(len=12) :: rev ! Input data ! ( 1 0 0 ) ! A = ( 2 3 0 ) ! ( 4 5 6 ) ! Number of rows and columns M = 3 N = 3 ! Number of non-zero entries nnz = 6 ! Fill CSR structure h_csr_row_ptr = (/0, 1, 3, 6/) h_csr_col_ind = (/0, 0, 1, 0, 1, 2/) h_csr_val = (/1, 2, 3, 4, 5, 6/) ! Scalar alpha alpha = 1.0 ! B (nrhs rhs vectors) ldb = m nrhs = 4 h_B = (/1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12/) ! Allocate device memory call HIP_CHECK(hipMalloc(d_csr_row_ptr, (int(M, c_size_t) + 1) * 4)) call HIP_CHECK(hipMalloc(d_csr_col_ind, int(nnz, c_size_t) * 4)) call HIP_CHECK(hipMalloc(d_csr_val, int(nnz, c_size_t) * 8)) call HIP_CHECK(hipMalloc(d_B, int(M * nrhs, c_size_t) * 8)) ! Copy host data to device call HIP_CHECK(hipMemcpy(d_csr_row_ptr, c_loc(h_csr_row_ptr), (int(M, c_size_t) + 1) * 4, 1)) call HIP_CHECK(hipMemcpy(d_csr_col_ind, c_loc(h_csr_col_ind), int(nnz, c_size_t) * 4, 1)) call HIP_CHECK(hipMemcpy(d_csr_val, c_loc(h_csr_val), int(nnz, c_size_t) * 8, 1)) call HIP_CHECK(hipMemcpy(d_B, c_loc(h_B), int(M * nrhs, c_size_t) * 8, 1)) ! Create rocSPARSE handle call ROCSPARSE_CHECK(rocsparse_create_handle(handle)) ! Get rocSPARSE version call ROCSPARSE_CHECK(rocsparse_get_version(handle, version)) call ROCSPARSE_CHECK(rocsparse_get_git_rev(handle, rev)) ! Print version on screen write(*,fmt='(A,I0,A,I0,A,I0,A,A)') 'rocSPARSE version: ', version / 100000, '.', & mod(version / 100, 1000), '.', mod(version, 100), '-', rev ! Create matrix descriptor call ROCSPARSE_CHECK(rocsparse_create_mat_descr(descr)) ! Matrix fill mode call ROCSPARSE_CHECK(rocsparse_set_mat_fill_mode(descr, rocsparse_fill_mode_lower)) ! Matrix diagonal type call ROCSPARSE_CHECK(rocsparse_set_mat_diag_type(descr, rocsparse_diag_type_non_unit)) ! Create matrix info structure call ROCSPARSE_CHECK(rocsparse_create_mat_info(info)) ! Obtain required buffer size call ROCSPARSE_CHECK(rocsparse_dcsrsm_buffer_size(handle, & rocsparse_operation_none, & rocsparse_operation_none, & M, & nrhs, & nnz, & c_loc(alpha), & descr, & d_csr_val, & d_csr_row_ptr, & d_csr_col_ind, & d_B, & ldb, & info, & rocsparse_solve_policy_auto, & c_loc(buffer_size))) ! Allocate temporary buffer write(*,fmt='(A,I0,A)') 'Allocating ', buffer_size / 1024, 'kB temporary storage buffer' call HIP_CHECK(hipMalloc(temp_buffer, buffer_size)) ! Perform analysis step call ROCSPARSE_CHECK(rocsparse_dcsrsm_analysis(handle, & rocsparse_operation_none, & rocsparse_operation_none, & M, & nrhs, & nnz, & c_loc(alpha), & descr, & d_csr_val, & d_csr_row_ptr, & d_csr_col_ind, & d_B, & ldb, & info, & rocsparse_analysis_policy_reuse, & rocsparse_solve_policy_auto, & temp_buffer)) ! Call dcsrsm to perform lower triangular solve Ly = x call ROCSPARSE_CHECK(rocsparse_dcsrsm_solve(handle, & rocsparse_operation_none, & rocsparse_operation_none, & M, & nrhs, & nnz, & c_loc(alpha), & descr, & d_csr_val, & d_csr_row_ptr, & d_csr_col_ind, & d_B, & ldb, & info, & rocsparse_solve_policy_auto, & temp_buffer)) ! Check for zero pivots stat = rocsparse_csrsm_zero_pivot(handle, info, c_loc(pivot)) if(stat .eq. rocsparse_status_zero_pivot) then write(*,fmt='(A,I0)') 'Found zero pivot in matrix row ', pivot end if ! Print result call HIP_CHECK(hipMemcpy(c_loc(h_B), d_B, int(m * nrhs, c_size_t) * 8, 2)) do i = 0, nrhs - 1 write(*,fmt='(A,I0,A)', advance='no') 'B(', i + 1, '):' do j = 1, M write(*,fmt='(A,F0.5)', advance='no') ' ', h_B(i * ldb + j) end do write(*,*) end do ! Clear rocSPARSE call ROCSPARSE_CHECK(rocsparse_destroy_mat_info(info)) call ROCSPARSE_CHECK(rocsparse_destroy_mat_descr(descr)) call ROCSPARSE_CHECK(rocsparse_destroy_handle(handle)) ! Clear device memory call HIP_CHECK(hipFree(d_csr_row_ptr)) call HIP_CHECK(hipFree(d_csr_col_ind)) call HIP_CHECK(hipFree(d_csr_val)) call HIP_CHECK(hipFree(d_B)) call HIP_CHECK(hipFree(temp_buffer)) end program example_fortran_csrsm