Initial reorg.

This is largely the same as #305, but updated for the current tree.

crates/misc/py/examples/gcd/.gitignore

@@ -0,0 +1 @@
+gcd.wasm

crates/misc/py/examples/gcd/README.md

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+# Build example's file
+
+To build `gcd.wasm` use rustc (nightly) for wasm32 target with debug information:
+
+```
+rustc +nightly --target=wasm32-unknown-unknown -g gcd.rs --crate-type=cdylib
+```
+
+# Run example
+
+Point path to the built wasmtime_py library location when running python, e.g.
+
+```
+PYTHONPATH=../../target/debug python3 run.py
+```

crates/misc/py/examples/gcd/gcd.rs

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+
+#[inline(never)]
+#[no_mangle]
+pub extern fn gcd(m_: u32, n_: u32) -> u32
+{
+        let mut m = m_;
+        let mut n = n_;
+        while m > 0 {
+                let tmp = m;
+                m = n % m;
+                n = tmp;
+        }       
+        return n;
+}
+
+#[no_mangle]
+pub extern fn test() -> u32 {
+  gcd(24, 9)
+}

crates/misc/py/examples/gcd/run.py

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+import wasmtime
+import gcd
+
+print("gcd(27, 6) =", gcd.gcd(27, 6))
+