Import SIMD feature and add some workload samples (#438)

core/iwasm/compilation/simd/simd_common.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2019 Intel Corporation. All rights reserved.
+ * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+ */
+
+#ifndef _SIMD_COMMON_H_
+#define _SIMD_COMMON_H_
+
+#include "../aot_compiler.h"
+
+LLVMValueRef
+simd_pop_v128_and_bitcast(const AOTCompContext *comp_ctx,
+                          const AOTFuncContext *func_ctx,
+                          LLVMTypeRef vec_type,
+                          const char *name);
+
+bool
+simd_bitcast_and_push_v128(const AOTCompContext *comp_ctx,
+                           const AOTFuncContext *func_ctx,
+                           LLVMValueRef vector,
+                           const char *name);
+
+#endif /* _SIMD_COMMON_H_ */