docs: Create compiletime README

runtime/compiletime/README.md

@@ -0,0 +1,5 @@
+A WebAssembly module instance is statically linked with the backing functions implementing the wasm32 ABI, yielding a *.so file that SLEdge can execute. This ensures that the instance is able to aggressively inline and optimize this code.
+
+They are broken into instruction types as on https://webassembly.github.io/spec/core/exec/instructions.html. They depend on common headers for the WebAssembly types located in the WebAssembly instance struct. These are located in runtime/include/common.
+
+The stubs correspond to awsm/src/codegen/runtime_stubs.rs

runtime/compiletime/table_instructions.c

@@ -1,11 +1,6 @@
 
 #include "types.h"
 
-/* This file contains the stub functions that the aWsm compiler expects
- * This corresponds to awsm/src/codegen/runtime_stubs.rs
- * This should be linked with the *.bc file generated by aWsm in order to compile a module as a *.so
- */
-
 extern thread_local struct wasm_module_instance current_wasm_module_instance;
 
 INLINE void
@@ -24,13 +19,6 @@ add_function_to_table(uint32_t idx, uint32_t type_id, char *pointer)
 	};
 }
 
-/*
- * Table handling functionality
- * This was moved from compiletime in order to place the
- * function in the callstack in GDB. It can be moved back
- * to runtime/compiletime/memory/64bit_nix.c to remove the
- * additional function call
- */
 INLINE char *
 get_function_from_table(uint32_t idx, uint32_t type_id)
 {