feat: optimize VM using dispatch table

src/vm/handlers/master.c

@@ -0,0 +1,81 @@
+#include <vm/internals/opcode.h>
+
+// Stack-relative opcodes group
+const opcode_handler group_stack[] = {
+    [1] = op_loadconst,
+    [2] = op_call_builtin,
+    [3] = op_pushnum,
+    [4] = op_pushbool,
+};
+
+// Context-relative opcodes group
+const opcode_handler group_ctx[] = {
+    [1] = op_mk_envtable, [2] = op_rm_envtable, [3] = op_store,
+    [4] = op_lookup_env,  [5] = op_write,
+};
+
+// Flow-relative opcodes group
+const opcode_handler group_flow[] = {
+    [1] = op_jmp,
+    [2] = op_jz,
+};
+
+// Function-relative opcodes group
+const opcode_handler group_fn[] = {
+    [1] = op_call,
+    [2] = op_ret,
+};
+
+// Object-relative opcodes group
+const opcode_handler group_obj[] = {
+    [1] = op_alloc_object,  [2] = op_get_field,   [3] = op_set_field,
+    [4] = op_escape_object, [5] = op_dereference,
+};
+
+// Math-relative opcodes group
+const opcode_handler group_math[] = {
+    [1] = op_add, [2] = op_sub, [3] = op_mul, [4] = op_div,
+    [5] = op_pow, [6] = op_mod, [7] = op_neg,
+};
+
+// String-relative opcodes group
+const opcode_handler group_str[] = {
+    [1] = op_build_str,
+};
+
+// Basic comparison
+const opcode_handler group_cmp[] = {
+    [1] = op_cmp_eq,   [2] = op_cmp_neq, [3] = op_cmp_lt,
+    [4] = op_cmp_lteq, [5] = op_cmp_gt,  [6] = op_cmp_gteq,
+};
+
+// Strings comparison
+const opcode_handler group_strcmp[] = {
+    [1] = op_cmp_eq_str,
+    [2] = op_cmp_neq_str,
+};
+
+// Object comparison
+const opcode_handler group_objcmp[] = {
+    [1] = op_cmp_eq_obj,
+    [2] = op_cmp_neq_obj,
+};
+
+// AND / OR opcodes
+const opcode_handler group_and_or[] = {
+    [1] = op_and,
+    [2] = op_or,
+};
+
+// NOT opcode
+const opcode_handler group_not[] = {
+    [1] = op_not,
+};
+
+// Master table
+const opcode_handler *const master_tbl[] = {
+    [0xF0] = group_stack,  [0xF1] = group_ctx,    [0xF2] = group_flow,
+    [0xF3] = group_fn,     [0xFA] = group_obj,    [0xA0] = group_math,
+    [0xA1] = group_str,    [0xB0] = group_cmp,    [0xB1] = group_strcmp,
+    [0xB2] = group_objcmp, [0xC0] = group_and_or, [0xD0] = group_not,
+};