拓展 TVM C++ 功能

在 C++ 中定义加法算子：

C++

#include <tvm/runtime/packed_func.h>
#include <tvm/runtime/registry.h>
#include <tvm/tir/op.h>

using namespace tvm::runtime;

namespace tvm_ext {
TVM_REGISTER_GLOBAL("tvm_ext.sym_add").set_body([](TVMArgs args, TVMRetValue* rv) {
  tvm::tir::Var a = args[0];
  tvm::tir::Var b = args[1];
  *rv = a + b;
});
} // namespace tvm_ext

MAKEFILE

# 部署 TVM 模块 的 Makefile 样例
# =================================================================================
IDIR = include
TVM_ROOT=$(shell cd /media/pc/data/lxw/ai/tvm; pwd)
PKG_CXXFLAGS = -std=c++17 -O2 -fPIC\
	-I${TVM_ROOT}/include\
	-I${TVM_ROOT}/3rdparty/dmlc-core/include\
	-I${TVM_ROOT}/3rdparty/dlpack/include\
	-I${IDIR}\
	-DDMLC_USE_LOGGING_LIBRARY=\<tvm/runtime/logging.h\>

PKG_LDFLAGS = -ldl -pthread
UNAME_S := $(shell uname -s)
ifeq ($(UNAME_S), Darwin)
	PKG_LDFLAGS += -undefined dynamic_lookup
endif

.PHONY: clean all

all: outputs/libs/libtvm_ext.so

# 定制 tvm 拓展运行时
# =================================================================================
outputs/libs/libtvm_ext.so: src/tvm_ext.cc
	@mkdir -p $(@D)
	$(CXX) $(PKG_CXXFLAGS) -shared -o $@ $^ $(PKG_LDFLAGS) -L${TVM_ROOT}/build

clean:
	rm -rf outputs/*

编译：

!cd ../cpp/sym_add && make clean && make

rm -rf outputs/*
g++ -std=c++17 -O2 -fPIC -I/media/pc/data/lxw/ai/tvm/include -I/media/pc/data/lxw/ai/tvm/3rdparty/dmlc-core/include -I/media/pc/data/lxw/ai/tvm/3rdparty/dlpack/include -Iinclude -DDMLC_USE_LOGGING_LIBRARY=\<tvm/runtime/logging.h\> -shared -o outputs/libs/libtvm_ext.so src/tvm_ext.cc -ldl -pthread -L/media/pc/data/lxw/ai/tvm/build

查看编译后的动态库：

!ls ../cpp/sym_add/outputs/libs

libtvm_ext.so