OR

The or instructions, are used for performing a bitwise OR, similar to the | operator in other languages.

Try it

(module (func (export "or") (param $a i32) (param $b i32) (result i32) ;; load both numbers onto the stack local.get $a local.get $b ;; `or` both numbers and return the result i32.or ) ) 
const url = "{%wasm-url%}"; await WebAssembly.instantiateStreaming(fetch(url), { console }).then( (result) => { const or = result.instance.exports.or; const res = or(0b10000010, 0b01101111); console.log(numToBin(res)); // Expected output: "11101111" }, ); function numToBin(num) { return (num >>> 0).toString(2).padStart(8, "0"); } 

Syntax

wat
;; load two numbers onto the stack i32.const 5 ;; 00000101 i32.const 3 ;; 00000011 ;; perform a bitwise OR i32.or ;; the top item on the stack will now be 7 (00000111) 
Instruction Binary opcode
i32.or 0x72
i64.or 0x84