1 files changed, 59 insertions, 0 deletions
diff --git a/src/interp/check_opcode.c b/src/interp/check_opcode.c
new file mode 100644
index 0000000..b10b927
--- /dev/null
+++ b/src/interp/check_opcode.c
@@ -0,0 +1,59 @@
+/*
+ * nanowasm, a tiny WebAssembly/Wasm interpreter
+ * Copyright (C) 2023-2024  Xavier Del Campo Romero
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+
+#include <nanowasm/nw.h>
+#include <nw/interp.h>
+#include <nw/io.h>
+#include <nw/log.h>
+#include <nw/opcodes.h>
+
+int nwp_interp_check_opcode(const uint8_t op, FILE *const f)
+{
+    static int (*const checks[])(FILE *) =
+    {
+        [OP_UNREACHABLE] = check_unreachable,
+        [OP_NOP] = check_nop,
+        [OP_BLOCK] = check_block,
+        [OP_LOOP] = check_loop,
+        [OP_IF] = check_if,
+        [OP_ELSE] = check_else,
+        [OP_END] = check_end,
+        [OP_BR] = check_br,
+        [OP_BR_IF] = check_br_if,
+        [OP_BR_TABLE] = check_br_table,
+        [OP_RETURN] = check_return,
+        [OP_CALL] = check_call,
+        [OP_CALL_INDIRECT] = check_call_indirect,
+        [OP_GET_LOCAL] = check_get_local,
+        [OP_SET_LOCAL] = check_set_local,
+        [OP_TEE_LOCAL] = check_tee_local,
+        [OP_GET_GLOBAL] = check_get_global,
+        [OP_SET_GLOBAL] = check_set_global,
+        [OP_I32_LOAD] = check_i32_load,
+        [OP_I32_STORE] = check_i32_store,
+        [OP_I32_CONST] = check_i32_const,
+        [OP_I64_CONST] = check_i64_const,
+        [OP_F32_CONST] = check_f32_const,
+        [OP_F64_CONST] = check_f64_const,
+        [OP_I32_SUB] = check_i32_sub
+    };
+
+    if (op >= sizeof checks / sizeof *checks)
+    {
+        LOG("%s: invalid opcode %#" PRIx8 "\n", __func__, op);
+        return 1;
+    }
+    else if (!checks[op])
+    {
+        LOG("%s: unsupported opcode %#" PRIx8 "\n", __func__, op);
+        return 1;
+    }
+
+    return checks[op](f);
+}