cookie-cutter: add bin for asm analysis

cookie-cutter/Cargo.toml

@@ -6,3 +6,18 @@ edition = "2021"
 [dependencies]
 macros = { path = "../macros", version = "0.1.0" }
 fill-array = "0.2.1"
+
+# for binary
+panic-halt = { version = "1.0.0", optional = true }
+cortex-m = { version = "0.7.7", optional = true }
+cortex-m-rt = { version = "0.7.3", optional = true }
+
+[features]
+binary = ["dep:panic-halt", "dep:cortex-m", "cortex-m-rt"]
+cortex-m-rt = ["dep:cortex-m-rt"]
+
+[[bin]]
+name = "test"
+bench = false
+test = false
+required-features = ["binary"]

cookie-cutter/src/bin/test.rs

@@ -0,0 +1,40 @@
+#![no_std]
+#![no_main]
+
+use core::ptr::{null, null_mut, read_volatile, write_volatile};
+
+use panic_halt as _;
+
+use cookie_cutter::{encoding::vanilla, SerializeIter};
+use cortex_m_rt::entry;
+
+#[derive(vanilla::SerializeIter)]
+struct Foo {
+    a: u32,
+    b: u16,
+}
+
+#[inline(never)]
+fn deserialize<const N: usize>(buf: &[u8; N]) -> Foo {
+    unsafe { Foo::deserialize_iter(buf).unwrap_unchecked() }
+}
+
+#[inline(never)]
+fn serialize<const N: usize>(foo: Foo, buf: &mut [u8; N]) {
+    unsafe { foo.serialize_iter(buf).unwrap_unchecked() }
+}
+
+#[entry]
+fn main() -> ! {
+    let buf = unsafe { read_volatile(null() as *const [u8; 20]) };
+
+    let foo = deserialize(&buf);
+
+    let mut buf = [0; 20];
+
+    serialize(foo, &mut buf);
+
+    unsafe { write_volatile(null_mut(), buf) };
+
+    loop {}
+}