add swap_ops utility macro

Author: Robbepop

crates/wasmi/src/engine/translator/func2/utils.rs

@@ -17,6 +17,17 @@ macro_rules! bail_unreachable {
     }};
 }
 
+/// Used to swap operands of binary [`Instruction`] constructor.
+///
+/// [`Instruction`]: crate::ir::Instruction
+macro_rules! swap_ops {
+    ($make_instr:path) => {
+        |result: $crate::ir::Reg, lhs, rhs| -> $crate::ir::Instruction {
+            $make_instr(result, rhs, lhs)
+        }
+    };
+}
+
 /// Implemented by types that can be reset for reuse.
 pub trait Reset: Sized {
     /// Resets `self` for reuse.