type_t* fortran_get_n_ranked_type_with_descriptor(type_t* scalar_type, int rank, decl_context_t decl_context)
{
scalar_type = no_ref(scalar_type);
ERROR_CONDITION(fortran_is_array_type(scalar_type), "This is not a scalar type!", 0);
if (rank == 0)
{
return scalar_type;
}
else if (rank > 0)
{
return get_array_type_bounds_with_descriptor(
fortran_get_n_ranked_type_with_descriptor(scalar_type, rank-1, decl_context), nodecl_null(), nodecl_null(), decl_context);
}
else
{
internal_error("Invalid rank %d\n", rank);
}
}
void LoweringVisitor::reduction_initialization_code(
OutlineInfo& outline_info,
Nodecl::NodeclBase ref_tree,
Nodecl::NodeclBase construct)
{
ERROR_CONDITION(ref_tree.is_null(), "Invalid tree", 0);
if (!Nanos::Version::interface_is_at_least("master", 5023))
{
running_error("%s: error: a newer version of Nanos++ (>=5023) is required for reductions support\n",
construct.get_locus_str().c_str());
}
TL::ObjectList<OutlineDataItem*> reduction_items = outline_info.get_data_items().filter(
predicate(lift_pointer(functor(&OutlineDataItem::is_reduction))));
ERROR_CONDITION (reduction_items.empty(), "No reductions to process", 0);
Source result;
Source reduction_declaration,
thread_initializing_reduction_info,
thread_fetching_reduction_info;
result
<< reduction_declaration
<< "{"
<< as_type(get_bool_type()) << " red_single_guard;"
<< "nanos_err_t err;"
<< "err = nanos_enter_sync_init(&red_single_guard);"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< "if (red_single_guard)"
<< "{"
<< "int nanos_num_threads = nanos_omp_get_num_threads();"
<< thread_initializing_reduction_info
<< "err = nanos_release_sync_init();"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< "}"
<< "else"
<< "{"
<< "err = nanos_wait_sync_init();"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< thread_fetching_reduction_info
<< "}"
<< "}"
;
for (TL::ObjectList<OutlineDataItem*>::iterator it = reduction_items.begin();
it != reduction_items.end();
it++)
{
std::string nanos_red_name = "nanos_red_" + (*it)->get_symbol().get_name();
std::pair<OpenMP::Reduction*, TL::Type> reduction_info = (*it)->get_reduction_info();
OpenMP::Reduction* reduction = reduction_info.first;
TL::Type reduction_type = reduction_info.second;
if (reduction_type.is_any_reference())
reduction_type = reduction_type.references_to();
TL::Type reduction_element_type = reduction_type;
if (IS_FORTRAN_LANGUAGE)
{
while (reduction_element_type.is_fortran_array())
reduction_element_type = reduction_element_type.array_element();
}
else
{
while (reduction_element_type.is_array())
reduction_element_type = reduction_element_type.array_element();
}
Source element_size;
if (IS_FORTRAN_LANGUAGE)
{
if (reduction_type.is_fortran_array())
{
// We need to parse this bit in Fortran
Source number_of_bytes;
number_of_bytes << "SIZE(" << (*it)->get_symbol().get_name() << ") * " << reduction_element_type.get_size();
element_size << as_expression(number_of_bytes.parse_expression(construct));
}
else
{
element_size << "sizeof(" << as_type(reduction_type) << ")";
}
}
else
{
element_size << "sizeof(" << as_type(reduction_type) << ")";
}
reduction_declaration
<< "nanos_reduction_t* " << nanos_red_name << ";"
;
Source allocate_private_buffer, cleanup_code;
Source num_scalars;
TL::Symbol basic_reduction_function, vector_reduction_function;
create_reduction_function(reduction, construct, reduction_type, basic_reduction_function, vector_reduction_function);
(*it)->reduction_set_basic_function(basic_reduction_function);
thread_initializing_reduction_info
<< "err = nanos_malloc((void**)&" << nanos_red_name << ", sizeof(nanos_reduction_t), "
<< "\"" << construct.get_filename() << "\", " << construct.get_line() << ");"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< nanos_red_name << "->original = (void*)"
<< (reduction_type.is_array() ? "" : "&") << (*it)->get_symbol().get_name() << ";"
<< allocate_private_buffer
<< nanos_red_name << "->vop = "
<< (vector_reduction_function.is_valid() ? as_symbol(vector_reduction_function) : "0") << ";"
<< nanos_red_name << "->bop = (void(*)(void*,void*,int))" << as_symbol(basic_reduction_function) << ";"
<< nanos_red_name << "->element_size = " << element_size << ";"
<< nanos_red_name << "->num_scalars = " << num_scalars << ";"
<< cleanup_code
<< "err = nanos_register_reduction(" << nanos_red_name << ");"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
;
if (IS_C_LANGUAGE
|| IS_CXX_LANGUAGE)
{
if (reduction_type.is_array())
{
num_scalars << "sizeof(" << as_type(reduction_type) << ") / sizeof(" << as_type(reduction_element_type) <<")";
}
else
{
num_scalars << "1";
}
allocate_private_buffer
<< "err = nanos_malloc(&" << nanos_red_name << "->privates, sizeof(" << as_type(reduction_type) << ") * nanos_num_threads, "
<< "\"" << construct.get_filename() << "\", " << construct.get_line() << ");"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< nanos_red_name << "->descriptor = " << nanos_red_name << "->privates;"
<< "rdv_" << (*it)->get_field_name() << " = (" << as_type( (*it)->get_private_type().get_pointer_to() ) << ")" << nanos_red_name << "->privates;"
;
thread_fetching_reduction_info
<< "err = nanos_reduction_get(&" << nanos_red_name << ", "
<< (reduction_type.is_array() ? "" : "&") << (*it)->get_symbol().get_name() << ");"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< "rdv_" << (*it)->get_field_name() << " = (" << as_type( (*it)->get_private_type().get_pointer_to() ) << ")" << nanos_red_name << "->privates;"
;
cleanup_code
<< nanos_red_name << "->cleanup = nanos_free0;"
;
}
else if (IS_FORTRAN_LANGUAGE)
{
Type private_reduction_vector_type;
Source extra_dims;
{
TL::Type t = (*it)->get_symbol().get_type().no_ref();
int rank = 0;
if (t.is_fortran_array())
{
rank = t.fortran_rank();
}
if (rank != 0)
{
// We need to parse this bit in Fortran
Source size_call;
size_call << "SIZE(" << (*it)->get_symbol().get_name() << ")";
num_scalars << as_expression(size_call.parse_expression(construct));
}
else
{
num_scalars << "1";
}
private_reduction_vector_type = fortran_get_n_ranked_type_with_descriptor(
get_void_type(), rank + 1, construct.retrieve_context().get_decl_context());
int i;
for (i = 0; i < rank; i++)
{
Source lbound_src;
lbound_src << "LBOUND(" << (*it)->get_symbol().get_name() << ", DIM = " << (rank - i) << ")";
Source ubound_src;
ubound_src << "UBOUND(" << (*it)->get_symbol().get_name() << ", DIM = " << (rank - i) << ")";
extra_dims
<< "["
<< as_expression(lbound_src.parse_expression(construct))
<< ":"
<< as_expression(ubound_src.parse_expression(construct))
<< "]";
t = t.array_element();
}
}
allocate_private_buffer
<< "@FORTRAN_ALLOCATE@((*rdv_" << (*it)->get_field_name() << ")[0:(nanos_num_threads-1)]" << extra_dims <<");"
<< nanos_red_name << "->privates = &(*rdv_" << (*it)->get_field_name() << ");"
<< "err = nanos_malloc(&" << nanos_red_name << "->descriptor, sizeof(" << as_type(private_reduction_vector_type) << "), "
<< "\"" << construct.get_filename() << "\", " << construct.get_line() << ");"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< "err = nanos_memcpy(" << nanos_red_name << "->descriptor, "
"&rdv_" << (*it)->get_field_name() << ", sizeof(" << as_type(private_reduction_vector_type) << "));"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
;
thread_fetching_reduction_info
<< "err = nanos_reduction_get(&" << nanos_red_name << ", &" << (*it)->get_symbol().get_name() << ");"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
<< "err = nanos_memcpy("
<< "&rdv_" << (*it)->get_field_name() << ","
<< nanos_red_name << "->descriptor, "
<< "sizeof(" << as_type(private_reduction_vector_type) << "));"
<< "if (err != NANOS_OK)"
<< "nanos_handle_error(err);"
;
TL::Symbol reduction_cleanup = create_reduction_cleanup_function(reduction, construct);
cleanup_code
<< nanos_red_name << "->cleanup = " << as_symbol(reduction_cleanup) << ";"
;
}
else
{
internal_error("Code unreachable", 0);
}
}
FORTRAN_LANGUAGE()
{
Source::source_language = SourceLanguage::C;
}
ref_tree.replace(result.parse_statement(ref_tree));
FORTRAN_LANGUAGE()
{
Source::source_language = SourceLanguage::Current;
}
}
