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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "generic_rename.h"
#include <vespa/eval/eval/value_builder_factory.h>
#include <vespa/eval/eval/wrap_param.h>
#include <vespa/vespalib/util/stash.h>
#include <vespa/vespalib/util/typify.h>
#include <cassert>
using namespace vespalib::eval::tensor_function;
namespace vespalib::eval::instruction {
using State = InterpretedFunction::State;
using Instruction = InterpretedFunction::Instruction;
namespace {
const vespalib::string &
find_rename(const vespalib::string & original,
const std::vector<vespalib::string> &from,
const std::vector<vespalib::string> &to)
{
for (size_t i = 0; i < from.size(); ++i) {
if (original == from[i]) {
return to[i];
}
}
return original;
}
size_t
find_index_of(const vespalib::string & name,
const std::vector<ValueType::Dimension> & dims)
{
for (size_t i = 0; i < dims.size(); ++i) {
if (name == dims[i].name) {
return i;
}
}
abort(); // should not happen
}
struct RenameParam {
ValueType res_type;
SparseRenamePlan sparse_plan;
DenseRenamePlan dense_plan;
const ValueBuilderFactory &factory;
RenameParam(const ValueType &lhs_type,
const std::vector<vespalib::string> &rename_dimension_from,
const std::vector<vespalib::string> &rename_dimension_to,
const ValueBuilderFactory &factory_in)
: res_type(lhs_type.rename(rename_dimension_from, rename_dimension_to)),
sparse_plan(lhs_type, res_type, rename_dimension_from, rename_dimension_to),
dense_plan(lhs_type, res_type, rename_dimension_from, rename_dimension_to),
factory(factory_in)
{
assert(!res_type.is_error());
assert(lhs_type.cell_type() == res_type.cell_type());
}
~RenameParam();
};
RenameParam::~RenameParam() = default;
template <typename CT>
std::unique_ptr<Value>
generic_rename(const Value &a,
const SparseRenamePlan &sparse_plan, const DenseRenamePlan &dense_plan,
const ValueType &res_type, const ValueBuilderFactory &factory)
{
auto cells = a.cells().typify<CT>();
SmallVector<string_id> output_address(sparse_plan.mapped_dims);
SmallVector<string_id*> input_address;
for (size_t maps_to : sparse_plan.output_dimensions) {
input_address.emplace_back(&output_address[maps_to]);
}
auto builder = factory.create_transient_value_builder<CT>(res_type,
sparse_plan.mapped_dims,
dense_plan.subspace_size,
a.index().size());
auto view = a.index().create_view({});
view->lookup({});
size_t subspace;
while (view->next_result(input_address, subspace)) {
CT *dst = builder->add_subspace(output_address).begin();
size_t input_offset = dense_plan.subspace_size * subspace;
auto copy_cells = [&](size_t input_idx) { *dst++ = cells[input_idx]; };
dense_plan.execute(input_offset, copy_cells);
}
return builder->build(std::move(builder));
}
template <typename CT>
void my_generic_rename_op(State &state, uint64_t param_in) {
const auto ¶m = unwrap_param<RenameParam>(param_in);
const Value &a = state.peek(0);
auto res_value = generic_rename<CT>(a, param.sparse_plan, param.dense_plan,
param.res_type, param.factory);
auto &result = state.stash.create<std::unique_ptr<Value>>(std::move(res_value));
const Value &result_ref = *(result.get());
state.pop_push(result_ref);
}
template <typename CT>
void my_mixed_rename_dense_only_op(State &state, uint64_t param_in) {
const auto ¶m = unwrap_param<RenameParam>(param_in);
const DenseRenamePlan &dense_plan = param.dense_plan;
const auto &index = state.peek(0).index();
auto lhs_cells = state.peek(0).cells().typify<CT>();
size_t num_subspaces = index.size();
size_t num_out_cells = dense_plan.subspace_size * num_subspaces;
ArrayRef<CT> out_cells = state.stash.create_uninitialized_array<CT>(num_out_cells);
CT *dst = out_cells.begin();
const CT *lhs = lhs_cells.begin();
auto copy_cells = [&](size_t input_idx) { *dst++ = lhs[input_idx]; };
for (size_t i = 0; i < num_subspaces; ++i) {
dense_plan.execute(0, copy_cells);
lhs += dense_plan.subspace_size;
}
assert(lhs == lhs_cells.end());
assert(dst == out_cells.end());
state.pop_push(state.stash.create<ValueView>(param.res_type, index, TypedCells(out_cells)));
}
struct SelectGenericRenameOp {
template <typename CM> static auto invoke(const RenameParam ¶m) {
using CT = CellValueType<CM::value.cell_type>;
if (param.sparse_plan.can_forward_index) {
return my_mixed_rename_dense_only_op<CT>;
}
return my_generic_rename_op<CT>;
}
};
} // namespace <unnamed>
//-----------------------------------------------------------------------------
SparseRenamePlan::SparseRenamePlan(const ValueType &input_type,
const ValueType &output_type,
const std::vector<vespalib::string> &from,
const std::vector<vespalib::string> &to)
: output_dimensions(), can_forward_index(true)
{
const auto in_dims = input_type.mapped_dimensions();
const auto out_dims = output_type.mapped_dimensions();
mapped_dims = in_dims.size();
assert(mapped_dims == out_dims.size());
for (const auto & dim : in_dims) {
const auto & renamed_to = find_rename(dim.name, from, to);
size_t index = find_index_of(renamed_to, out_dims);
assert(index < mapped_dims);
if (index != output_dimensions.size()) {
can_forward_index = false;
}
output_dimensions.emplace_back(index);
}
assert(output_dimensions.size() == mapped_dims);
}
SparseRenamePlan::~SparseRenamePlan() = default;
DenseRenamePlan::DenseRenamePlan(const ValueType &lhs_type,
const ValueType &output_type,
const std::vector<vespalib::string> &from,
const std::vector<vespalib::string> &to)
: loop_cnt(),
stride(),
subspace_size(output_type.dense_subspace_size())
{
assert (subspace_size == lhs_type.dense_subspace_size());
const auto lhs_dims = lhs_type.nontrivial_indexed_dimensions();
const auto out_dims = output_type.nontrivial_indexed_dimensions();
size_t num_dense_dims = lhs_dims.size();
assert(num_dense_dims == out_dims.size());
SmallVector<size_t> lhs_loopcnt(num_dense_dims);
SmallVector<size_t> lhs_stride(num_dense_dims, 1);
size_t lhs_size = 1;
for (size_t i = num_dense_dims; i-- > 0; ) {
lhs_stride[i] = lhs_size;
lhs_loopcnt[i] = lhs_dims[i].size;
lhs_size *= lhs_loopcnt[i];
}
assert(lhs_size == subspace_size);
size_t prev_index = num_dense_dims;
for (const auto & dim : out_dims) {
const auto & renamed_from = find_rename(dim.name, to, from);
size_t index = find_index_of(renamed_from, lhs_dims);
assert(index < num_dense_dims);
if (prev_index + 1 == index) {
assert(stride.back() == lhs_stride[index] * lhs_loopcnt[index]);
loop_cnt.back() *= lhs_loopcnt[index];
stride.back() = lhs_stride[index];
} else {
loop_cnt.emplace_back(lhs_loopcnt[index]);
stride.emplace_back(lhs_stride[index]);
}
prev_index = index;
}
}
DenseRenamePlan::~DenseRenamePlan() = default;
InterpretedFunction::Instruction
GenericRename::make_instruction(const ValueType &result_type,
const ValueType &input_type,
const std::vector<vespalib::string> &rename_dimension_from,
const std::vector<vespalib::string> &rename_dimension_to,
const ValueBuilderFactory &factory, Stash &stash)
{
auto ¶m = stash.create<RenameParam>(input_type,
rename_dimension_from, rename_dimension_to,
factory);
assert(result_type == param.res_type);
assert(result_type.cell_meta().eq(input_type.cell_meta()));
auto fun = typify_invoke<1,TypifyCellMeta,SelectGenericRenameOp>(param.res_type.cell_meta().not_scalar(), param);
return Instruction(fun, wrap_param<RenameParam>(param));
}
} // namespace
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