First commit

1 files changed, 76 insertions, 0 deletions

diff --git a/src/op/memory/i32_load.c b/src/op/memory/i32_load.c
new file mode 100644
index 0000000..04dbec7
--- /dev/null
+++ b/src/op/memory/i32_load.c
@@ -0,0 +1,76 @@
+/*
+ * 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 <nw/log.h>
+#include <nw/ops.h>
+#include <nanowasm/nw.h>
+#include <nw/interp.h>
+#include <nw/types.h>
+#include <stddef.h>
+#include <stdio.h>
+
+static int load(struct nw_interp *const i, const varuint32 flags,
+    const varuint32 offset)
+{
+    enum {ALIGN = 2};
+    int32_t value;
+
+    if (flags != ALIGN)
+    {
+        LOG("%s: expected 32-bit alignment (%d), got %lu\n",
+            __func__, ALIGN, (unsigned long)flags);
+        i->exception = "unaligned access";
+        return -1;
+    }
+    else if (interp_heap_load(i, offset, &value, sizeof value))
+    {
+        LOG("%s: interp_heap_load failed\n", __func__);
+        return -1;
+    }
+    else if (interp_stack_push(i, &value, sizeof value))
+    {
+        LOG("%s: interp_stack_push failed\n", __func__);
+        return -1;
+    }
+
+    return 0;
+}
+
+static int op(struct nw_interp *const i, FILE *const f)
+{
+    varint32 flags, offset;
+
+    if (varint32_read(f, &flags))
+    {
+        LOG("%s: varint32_read flags failed\n", __func__);
+        return 1;
+    }
+    else if (varint32_read(f, &offset))
+    {
+        LOG("%s: varint32_read offset failed\n", __func__);
+        return 1;
+    }
+    else if (i && load(i, flags, offset))
+    {
+        LOG("%s: load failed\n", __func__);
+        return -1;
+    }
+
+    return 0;
+}
+
+int op_i32_load(struct nw_interp *const i)
+{
+    return op(i, i->f);
+}
+
+int check_i32_load(FILE *const f)
+{
+    return op(NULL, f);
+}