/*! * Copyright (c) 2018 by Contributors * * \file src/relay/op/device_copy.cc * \brief Crossing device data copy operator. * * The pattern of this operator is registered as kOpaque. Hence, it could be * used as "barrier" to avoid fusing operators belonging to differen devices. */ #include <tvm/relay/attrs/device_copy.h> #include <tvm/relay/expr.h> #include <tvm/relay/op.h> #include <tvm/relay/op_attr_types.h> #include "type_relations.h" #include "../pass/alter_op_layout.h" namespace tvm { namespace relay { // relay.device_copy TVM_REGISTER_NODE_TYPE(DeviceCopyAttrs); TVM_REGISTER_API("relay.op._make.device_copy") .set_body_typed<Expr(Expr, int, int)>([](Expr data, int src_dev_type, int dst_dev_type) { auto attrs = make_node<DeviceCopyAttrs>(); attrs->src_dev_type = src_dev_type; attrs->dst_dev_type = dst_dev_type; static const Op& op = Op::Get("device_copy"); return CallNode::make(op, {data}, Attrs(attrs), {}); }); RELAY_REGISTER_OP("device_copy") .describe(R"code( Copy data from one tensor to another. The source and destination might be on different devices. )code" TVM_ADD_FILELINE) .set_num_inputs(1) .set_support_level(10) .add_type_rel("Identity", IdentityRel) .set_attr<TOpPattern>("TOpPattern", kOpaque) .set_attr<TOpIsStateful>("TOpIsStateful", false) .set_attr<FInferCorrectLayout>("FInferCorrectLayout", ElemwiseArbitraryLayout); } // namespace relay } // namespace tvm