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/interp/global/CMakeLists.txt | 11 +++++++++++
 src/interp/global/load.c         | 34 ++++++++++++++++++++++++++++++++++
 src/interp/global/store.c        | 34 ++++++++++++++++++++++++++++++++++
 3 files changed, 79 insertions(+)
 create mode 100644 src/interp/global/CMakeLists.txt
 create mode 100644 src/interp/global/load.c
 create mode 100644 src/interp/global/store.c

(limited to 'src/interp/global')

diff --git a/src/interp/global/CMakeLists.txt b/src/interp/global/CMakeLists.txt
new file mode 100644
index 0000000..0f0e056
--- /dev/null
+++ b/src/interp/global/CMakeLists.txt
@@ -0,0 +1,11 @@
+# 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/.
+
+target_sources(${PROJECT_NAME} PRIVATE
+    load.c
+    store.c
+)
diff --git a/src/interp/global/load.c b/src/interp/global/load.c
new file mode 100644
index 0000000..26d8c8d
--- /dev/null
+++ b/src/interp/global/load.c
@@ -0,0 +1,34 @@
+/*
+ * 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/global.h>
+#include <nw/mem.h>
+#include <nw/log.h>
+
+enum nw_state nwp_global_load(struct nw_interp *const i,
+    struct nw_sm_io *const io, const nw_varuint32 index)
+{
+    const struct nw_interp_cfg *const cfg = &i->cfg;
+    const size_t offset = index * sizeof (struct nw_global);
+    const enum nw_state n = nwp_mem_load(&cfg->global, io, offset, cfg->user);
+
+    if (n == NW_FATAL)
+    {
+        static const char *const exc = "failed to load from global memory";
+
+#ifdef NW_LOG
+        nwp_log("%s\n", exc);
+#endif
+        i->exception = exc;
+    }
+
+    return n;
+}
diff --git a/src/interp/global/store.c b/src/interp/global/store.c
new file mode 100644
index 0000000..91550d4
--- /dev/null
+++ b/src/interp/global/store.c
@@ -0,0 +1,34 @@
+/*
+ * 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/global.h>
+#include <nw/interp.h>
+#include <nw/mem.h>
+#include <nw/log.h>
+
+enum nw_state nwp_global_store(struct nw_interp *const i,
+    struct nw_sm_io *const io, const nw_varuint32 index)
+{
+    const struct nw_interp_cfg *const cfg = &i->cfg;
+    const size_t offset = index * sizeof (struct nw_global);
+    const enum nw_state n = nwp_mem_store(&cfg->global, io, offset, cfg->user);
+
+    if (n == NW_FATAL)
+    {
+        static const char *const exc = "failed to store into global memory";
+
+#ifdef NW_LOG
+        nwp_log("%s\n", exc);
+#endif
+        i->exception = exc;
+    }
+
+    return n;
+}
-- 
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