1 files changed, 22 insertions, 0 deletions
diff --git a/src/op/i32_eqz.c b/src/op/i32_eqz.c
new file mode 100644
index 0000000..cd533fd
--- /dev/null
+++ b/src/op/i32_eqz.c
@@ -0,0 +1,22 @@
+/*
+ * nanowasm, a tiny WebAssembly/Wasm interpreter
+ * Copyright (C) 2023-2025  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/routines.h>
+
+static int eqz(const union nw_value *const in, union nw_value *const out)
+{
+    out->i32 = !in->i32;
+    return 0;
+}
+
+void nwp_op_i32_eqz(struct nw_interp *const i)
+{
+    nwp_unary(i, NW_TYPE_I32, eqz);
+}