Left rotate

(module (func (export "rotate_left") (param $num i32) (param $by i32) (result i32) ;; load the number to rotate and the by how many spots local.get $num local.get $by ;; rotate and return the result i32.rotl ) ) 

const url = "{%wasm-url%}"; await WebAssembly.instantiateStreaming(fetch(url), { console }).then( (result) => { const rotate_left = result.instance.exports.rotate_left; const res = rotate_left(0b11100000_00000000_00000000_00000000, 1); console.log(numToBin(res)); // Expected output: "11000000_00000000_00000000_00000001" }, ); function numToBin(num) { return (num >>> 0) .toString(2) .padStart(32, "0") .match(/.{1,8}/g) .join("_"); } 

;; load two numbers onto the stack i32.const 3758096384 ;; 11100000_00000000_00000000_00000000 i32.const 1 ;; left rotate one spot ;; perform a bitwise left-rotate i32.rotl ;; the top item on the stack will now be 3221225473 ;; (11000000_00000000_00000000_00000001)