Update wasi nn definition

core/iwasm/libraries/wasi-nn/wasi_nn.c

@@ -5,64 +5,61 @@
 #include <string.h>
 #include <stdlib.h>
 
-#include <tensorflow/lite/interpreter.h>
-#include <tensorflow/lite/kernels/register.h>
-#include <tensorflow/lite/model.h>
-#include <tensorflow/lite/optional_debug_tools.h> 
+#include "wasm_export.h"
 
-std::unique_ptr<tflite::Interpreter> interpreter = NULL;
-std::unique_ptr<tflite::FlatBufferModel> model =NULL;
+// #include <tensorflow/lite/interpreter.h>
+// #include <tensorflow/lite/kernels/register.h>
+// #include <tensorflow/lite/model.h>
+// #include <tensorflow/lite/optional_debug_tools.h> 
 
-º
-void load(graph_builder_array builder, graph_encoding encoding)
+// std::unique_ptr<tflite::Interpreter> interpreter = NULL;
+// std::unique_ptr<tflite::FlatBufferModel> model = NULL;
+
+void wasi_nn_load(wasm_exec_env_t exec_env, graph_builder_array builder, graph_encoding encoding)
 {
-    model = tflite::FlatBufferModel::BuildFromBuffer(builder[0]);
-    tflite::ops::builtin::BuiltinOpResolver resolver;
-	tflite::InterpreterBuilder builder(*model, resolver);
-	builder(&interpreter);
-
+    // tflite::ErrorReporter *error_reporter;
+    // model = tflite::FlatBufferModel::BuildFromBuffer(
+    //     (const char *)builder[0],
+    //     1000, // TODO: find how to pass buffer size
+    //     error_reporter
+    // );
+    // tflite::ops::builtin::BuiltinOpResolver resolver;
+	// tflite::InterpreterBuilder(*model, resolver)(&interpreter);
+    printf("Inside wasi_nn_load!\n\n");
 }
 
-void init_execution_context()
+void wasi_nn_init_execution_context()
 {
 
 }
 
-//run inference functions
-
-void set_input()
+void wasi_nn_set_input()
 {
-    interpreter->AllocateTensors() ;
-
+    // interpreter->AllocateTensors();
 }
 
-void compute (graph_execution_context context )
-{
-
-    return 
-}
-
-
-void get_output()
+void wasi_nn_compute()
 {
 
 }
 
-/*
+void wasi_nn_get_output()
+{
+
+}
+
+/* clang-format off */
+#define REG_NATIVE_FUNC(func_name, signature) \
+    { #func_name, wasi_nn_##func_name, signature, NULL }
+/* clang-format on */
+
 static NativeSymbol native_symbols_wasi_nn[] = {
-    REG_NATIVE_FUNC(args_get, "(**)i"),
-    REG_NATIVE_FUNC(args_sizes_get, "(**)i"),
-    REG_NATIVE_FUNC(clock_res_get, "(i*)i"),
-    REG_NATIVE_FUNC(clock_time_get, "(iI*)i"),
-    REG_NATIVE_FUNC(environ_get, "(**)i"),
-    REG_NATIVE_FUNC(environ_sizes_get, "(**)i"),
+    REG_NATIVE_FUNC(load, "(ii)"),
 };
-*/
 
-
-uint32
+uint32_t
 get_wasi_nn_export_apis(NativeSymbol **p_libc_wasi_apis)
 {
-    *p_libc_wasi_apis = native_symbols_libc_wasi;
-    return sizeof(native_symbols_libc_wasi) / sizeof(NativeSymbol);
+    *p_libc_wasi_apis = native_symbols_wasi_nn;
+    return sizeof(native_symbols_wasi_nn) / sizeof(NativeSymbol);
 }

core/iwasm/libraries/wasi-nn/wasi_nn.cmake

@@ -1,9 +1,7 @@
-# Copyright (C) 2019 Intel Corporation.  All rights reserved.
-# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+set (WASI_NN_DIR ${CMAKE_CURRENT_LIST_DIR})
 
-cmake_minimum_required (VERSION 2.8...3.16)
+add_definitions (-DWASM_ENABLE_WASI_NN=1)
 
-project(wasi_nn)
+file (GLOB_RECURSE source_all ${WASI_NN_DIR}/*.c)
 
-add_library(${PROJECT_NAME} STATIC ${CMAKE_CURRENT_LIST_DIR}/wasi_nn.c)
-target_include_directories(${PROJECT_NAME} PUBLIC ${CMAKE_CURRENT_LIST_DIR})
+set (LIBC_WASI_NN_SOURCE ${source_all})

core/iwasm/libraries/wasi-nn/wasi_nn.h

@@ -1,36 +1,63 @@
-/*
- * Copyright (C) 2019 Intel Corporation.  All rights reserved.
- * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
- */
+#ifndef WASI_NN_H
+#define WASI_NN_H
 
-#ifndef _WASI_SOCKET_EXT_H_
-#define _WASI_SOCKET_EXT_H_
-
-#include <stddef.h>
 #include <stdint.h>
 
+/**
+ * Following definition from:
+ * https://github.com/WebAssembly/wasi-nn/blob/c557b2e9f84b6630f13b3185b43607f0388343b2/phases/ephemeral/witx/wasi_ephemeral_nn.witx
+ */
+
 typedef uint32_t buffer_size;
 
-typedef enum:uint16_t {sucess, invalid_argument, missing_memory, busy } nn_erno; 
+typedef enum {
+    suces = 0,
+    invalid_argument,
+    missing_memory,
+    busy
+} nn_erno; 
 
 typedef uint32_t *  tensor_dimensions;
 
-typedef enum:uint8_t {f16, f32, u8, i32};
+typedef enum {
+    f16 = 0,
+    f32,
+    u8,
+    i32
+} tensor_type;
+
+typedef uint8_t* tensor_data;
 
 typedef struct {
-
     tensor_dimensions dimensions;
-
     tensor_type type;
-
     tensor_data data;
-
 } tensor;
 
 typedef uint8_t * graph_builder;
 
 typedef graph_builder * graph_builder_array;
 
-typedef handle graph;
+typedef enum {
+    openvino = 0,
+    tensorflow,
+    onnx
+} graph_encoding;
 
-typedef enum {openvino=0, tensorflow,onnx } graph_encoding;
+typedef enum {
+    cpu = 0,
+    gpu,
+    tpu
+} execution_target;
+
+void load(graph_builder_array builder, graph_encoding encoding);
+
+void init_execution_context();
+
+void set_input();
+
+void compute();
+
+void get_output();
+
+#endif