ashutosh-arm commented on a change in pull request #8951:
URL: https://github.com/apache/tvm/pull/8951#discussion_r710106598
##########
File path: src/relay/backend/contrib/cmsisnn/codegen_cmsisnn.cc
##########
@@ -16,190 +16,36 @@
* specific language governing permissions and limitations
* under the License.
*/
-#include <cmath>
-#include <fstream>
-#include <map>
-#include <sstream>
-#include <string>
-#include <vector>
-
-#include "../../../../runtime/file_utils.h"
-#include "../../../../target/source/codegen_c.h"
-#include "../../../qnn/utils.h"
+#include <tvm/relay/transform.h>
+#include <tvm/runtime/module.h>
+#include <tvm/runtime/registry.h>
namespace tvm {
-namespace runtime {
-
-using namespace tir;
-
-class CodeGenCMSISNN : public tvm::codegen::CodeGenC {
- public:
- void Init(bool output_ssa) {
- decl_stream << "#include <stdio.h>\n";
- decl_stream << "#include <stdlib.h>\n";
- decl_stream << "#include <dlpack/dlpack.h>\n";
- decl_stream << "#include <tvm/runtime/crt/module.h>\n";
- decl_stream << "#include <arm_nnfunctions.h>\n";
- CodeGenC::Init(output_ssa);
- }
-
- /*!
- * \brief Emit code that offloads a subgraph to the Cortex-M
- *
- * \return string of code that offloads a subgraph to the Cortex-M
- */
- void AddFunction(const PrimFunc& prim_func) {
- PrintExternCPrefix(stream);
- CodeGenC::AddFunction(prim_func);
- PrintExternCPostfix(stream);
- }
-
- private:
- void VisitExpr_(const CallNode* op, std::ostream& os) { // NOLINT(*)
- if (!op->op.same_as(builtin::call_extern())) {
- return;
- }
- std::string cmsis_func_name = op->args[0].as<StringImmNode>()->value;
- if (cmsis_func_name == "arm_softmax_s8") {
- EmitSoftmax(op);
- }
- return;
- }
-
- /*! * \brief Creates a cplusplus guard prefix for extern "C" printing */
- void PrintExternCPrefix(std::ostringstream& ss) {
- PrintIndent();
- ss << "#ifdef __cplusplus\n";
- ss << "extern \"C\" {\n";
- ss << "#endif\n";
- }
-
- /*! * \brief Creates a cplusplus guard postfix for extern "C" printing */
- void PrintExternCPostfix(std::ostringstream& ss) {
- PrintIndent();
- ss << "#ifdef __cplusplus\n";
- ss << "}\n";
- ss << "#endif\n";
- }
-
- /*! * \brief Emits CMSIS-NN code block for softmax */
- void EmitSoftmax(const CallNode* op) {
- // @tir.call_extern("arm_softmax_s8", buffer_0, num_rows, row_size, scale,
buffer_1, dtype=int8)
- std::string cmsis_func_name = op->args[0].as<StringImmNode>()->value;
- int32_t num_rows = op->args[2].as<IntImmNode>()->value;
- int32_t row_size = op->args[3].as<IntImmNode>()->value;
- float quant_scale = op->args[4].as<FloatImmNode>()->value;
-
- // calculate multiplier and shift for CMSIS-NN softmax API
- // Note: tfl micro assumptions
- // TF_LITE_ENSURE_TYPES_EQ(context, output->type, kTfLiteInt8);
- // TF_LITE_ENSURE_EQ(context, output->params.zero_point, -128);
- // TF_LITE_ENSURE(context, output->params.scale == 1.f / 256);
- double beta = 1.0;
- int32_t input_bits = 5;
- double beta_multiplier = (beta * quant_scale * (1 << (31 - input_bits)));
- beta_multiplier = std::min<double>(beta_multiplier, (1ll << 31) - 1.0);
- auto mult_shift_pair =
tvm::relay::qnn::GetFixedPointMultiplierShift(beta_multiplier);
- int32_t mult = std::get<0>(mult_shift_pair);
- int32_t shift = std::get<1>(mult_shift_pair);
- int32_t diff_min = (1 << 5) - 1;
- diff_min <<= (31 - 5);
- diff_min >>= shift;
- diff_min *= -1;
-
- PrintIndent();
- stream << "int32_t num_rows = " << num_rows << ";\n";
- PrintIndent();
- stream << "int32_t row_size = " << row_size << ";\n";
- PrintIndent();
- stream << "int32_t mult = " << mult << ";\n";
- PrintIndent();
- stream << "int32_t shift = " << shift << ";\n";
- PrintIndent();
- stream << "int32_t diff_min = " << diff_min << ";\n";
- PrintIndent();
- stream << cmsis_func_name << "(buffer,";
- PrintIndent();
- stream << " num_rows, row_size, mult, shift, diff_min, buffer1);\n";
- PrintIndent();
- stream << "return;\n";
- }
-};
-
-class CMSISNNModuleNode : public runtime::ModuleNode {
- public:
- CMSISNNModuleNode(const std::string& code, const std::string& fmt,
- const Array<String>& func_names)
- : code_(code), fmt_(fmt), func_names_(func_names) {}
-
- std::string GetSource(const std::string& format) final { return code_; }
-
- const char* type_key() const { return "c"; }
-
- PackedFunc GetFunction(const std::string& name, const ObjectPtr<Object>&
sptr_to_self) final {
- if (name == "get_symbol") {
- return PackedFunc(
- [sptr_to_self, this](TVMArgs args, TVMRetValue* rv) { *rv =
this->func_names_[0]; });
- } else if (name == "get_func_names") {
- return PackedFunc(
- [sptr_to_self, this](TVMArgs args, TVMRetValue* rv) { *rv =
this->func_names_; });
- } else {
- return PackedFunc(nullptr);
- }
- }
-
- void SaveToFile(const std::string& file_name, const std::string& format)
final {
- std::string fmt = GetFileFormat(file_name, format);
- std::string meta_file = GetMetaFilePath(file_name);
- if (fmt == "c" || fmt == "cu") {
- ICHECK_NE(code_.length(), 0);
- SaveBinaryToFile(file_name, code_);
- } else {
- ICHECK_EQ(fmt, fmt_) << "Can only save to format=" << fmt_;
- }
- }
-
- protected:
- std::string code_;
- std::string fmt_;
- Array<String> func_names_;
-};
-
-class CMSISNNModule : public Module {
- public:
- CMSISNNModule() {}
- explicit CMSISNNModule(ObjectPtr<Object> n) : Module(n) {}
- inline CMSISNNModuleNode* operator->();
- inline const CMSISNNModuleNode* operator->() const;
-};
-
-inline CMSISNNModuleNode* CMSISNNModule::operator->() {
- return static_cast<CMSISNNModuleNode*>(get_mutable());
-}
-
-static Module CMSISNNModuleNodeCreate(IRModule mod) {
- bool output_ssa = false;
- CodeGenCMSISNN cg;
- Array<String> function_names;
- cg.Init(output_ssa);
- ICHECK(mod->functions.size() == 1) << "Supports modules with single
PrimFunc.";
- for (auto kv : mod->functions) {
- ICHECK(kv.second->IsInstance<PrimFuncNode>()) << "CodegenCHost: Can only
take PrimFunc";
- auto f = Downcast<PrimFunc>(kv.second);
- auto global_symbol = f->GetAttr<String>(tvm::attr::kGlobalSymbol);
- ICHECK(global_symbol.defined())
- << "CodeGenCHost: Expect PrimFunc to have the global_symbol attribute";
- function_names.push_back(global_symbol.value());
- cg.AddFunction(f);
- }
- std::string code = cg.Finish();
- auto n = make_object<CMSISNNModuleNode>(code, "c", function_names);
- return Module(n);
+namespace relay {
+namespace contrib {
+namespace cmsisnn {
+
+transform::Pass RelayToTIR();
+
+runtime::Module CompileCMSISNN(const ObjectRef& ref) {
+ IRModule relay_mod;
+ Function relay_func = Downcast<Function>(ref);
+ auto func_name = relay_func->GetAttr<String>(tvm::attr::kGlobalSymbol);
+ GlobalVar var = GlobalVar(func_name.value());
+ relay_mod->Add(var, relay_func);
+ relay_mod = transform::InferType()(relay_mod);
+
+ Array<transform::Pass> pass_seqs{transform::InferType(), RelayToTIR()};
+ transform::Sequential seq(pass_seqs);
+ IRModule tir_mod = seq(relay_mod);
+
+ const auto* pf = runtime::Registry::Get("runtime.CMSISNNModuleNodeCreate");
Review comment:
I wanted to do that, Just didn't do it because the definition
CMSISNNModuleNodeCreate is in cc file not in the header. This block of code
inside codegen_cmsisnn.py should go away later with target hooks later on.
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