Flattened package hierarchy

src/x64/ExtendRAXToRDX.go

@@ -0,0 +1,7 @@
+package x64
+
+// ExtendRAXToRDX doubles the size of RAX by sign-extending it to RDX.
+// This is also known as CQO.
+func ExtendRAXToRDX(code []byte) []byte {
+	return append(code, 0x48, 0x99)
+}