First commit

1 files changed, 36 insertions, 0 deletions

diff --git a/src/op/br.c b/src/op/br.c
new file mode 100644
index 0000000..83ceca7
--- /dev/null
+++ b/src/op/br.c
@@ -0,0 +1,36 @@
+/*
+ * 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/interp.h>
+#include <nw/io.h>
+#include <nw/ops.h>
+#include <nw/routines.h>
+
+static enum nw_state get_relative_depth(struct nw_interp *const i)
+{
+    struct nw_i_sm_br *const b = &i->sm.br;
+    const struct nw_io_cfg *const cfg = &i->cfg.io;
+    const enum nw_state n = nwp_varuint32(cfg, &b->leb128,
+        &b->relative_depth, cfg->user);
+
+    if (n)
+        return n;
+
+    nwp_break(i, b->relative_depth);
+    return NW_AGAIN;
+}
+
+void nwp_op_br(struct nw_interp *const i)
+{
+    static const struct nw_i_sm_br b = {0};
+
+    i->next = get_relative_depth;
+    i->sm.br = b;
+}