From 6d9d80362f9932bbc87e162b8ef7df06c73e27e1 Mon Sep 17 00:00:00 2001
From: Xavier Del Campo Romero <xavi.dcr@tutanota.com>
Date: Sat, 7 Sep 2024 00:04:38 +0200
Subject: First commit

---
 src/op/call.c | 50 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 src/op/call.c

(limited to 'src/op/call.c')

diff --git a/src/op/call.c b/src/op/call.c
new file mode 100644
index 0000000..11a9183
--- /dev/null
+++ b/src/op/call.c
@@ -0,0 +1,50 @@
+/*
+ * 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>
+#include <nw/types.h>
+
+static enum nw_state get_pc(struct nw_interp *const i)
+{
+    struct nw_i_sm_call *const c = &i->sm.call;
+    const struct nw_io_cfg *const cfg = &i->cfg.io;
+    const enum nw_state n = cfg->tell(&i->fr.pc, cfg->user);
+
+    if (n)
+        return n;
+
+    nwp_call(i, c->index);
+    return NW_AGAIN;
+}
+
+static enum nw_state get_index(struct nw_interp *const i)
+{
+    struct nw_i_sm_call *const c = &i->sm.call;
+    struct nw_sm_leb128 *const l = &c->leb128;
+    const struct nw_io_cfg *const cfg = &i->cfg.io;
+    const enum nw_state n = nwp_varuint32(cfg, l, &c->index, cfg->user);
+
+    if (n)
+        return n;
+
+    i->next = get_pc;
+    return NW_AGAIN;
+}
+
+void nwp_op_call(struct nw_interp *const i)
+{
+    static const struct nw_i_sm_call c = {0};
+
+    i->sm.call = c;
+    i->next = get_index;
+}
-- 
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