Bytecode interpreter init

code_generating_script.py

@@ -0,0 +1,68 @@
+result = """
+//
+// Generated using code_generating_script.py
+//
+"""
+
+types = ["S64", "S32", "S16", "S8", "U64", "U32", "U16", "U8", "F32", "F64"]
+
+#
+# Generate utility functions
+#
+if False:
+  for T in types:
+    t = T.lower()
+    result += f"""
+
+  force_inline void
+  stack_push_{t}(Bc *b, {T} value){{
+    U64 allocation_size = 2*sizeof(U64);
+    auto data = (U8 *)arena_push_size(&b->stack, allocation_size);
+
+    C({T}, data) = value;
+    data += sizeof(U64);
+
+    C(U64, data) = TYPE_{T};
+
+    b->stack_pointer += allocation_size;
+  }}
+
+  force_inline void
+  emit_push_{t}(Bc *bc, {T} emit_value){{
+    U8 *instruction = (U8 *)arena_push_size(&bc->instructions, sizeof(U8)+sizeof({T}));
+    *instruction = INS_PUSH_{T};
+
+    {T} *value = ({T} *)(instruction + 1);
+    *value = emit_value;
+  }}
+    """
+
+#
+# Generate switch cases
+#
+if True:
+  for T in types:
+    t = T.lower()
+    result += f"""
+case INS_PUSH_{T}:{{
+  // Fetch value from instruction
+  // instructions are tightly packed so we
+  // move pointer by the type size
+  auto value = ({T} *)b->ins_pointer;
+  b->ins_pointer += sizeof({T});
+  stack_push_{t}(b, *value);
+}} break;
+    """
+
+result += """
+//
+// **End** of generated using code_generating_script.py
+//
+"""
+
+#
+# Copy to **WINDOWS** clipboard
+#
+import subprocess
+subprocess.run("clip", universal_newlines=True, input=result)
+