AND
Die and
-Anweisungen werden verwendet, um eine Bitweise-UND-Operation durchzuführen, ähnlich dem &
-Operator in anderen Programmiersprachen.
Probieren Sie es aus
(module
(func (export "and") (param $a i32) (param $b i32) (result i32)
;; load both numbers onto the stack
local.get $a
local.get $b
;; `and` both numbers and return the result
i32.and
)
)
const url = "{%wasm-url%}";
await WebAssembly.instantiateStreaming(fetch(url), { console }).then(
(result) => {
const and = result.instance.exports.and;
const res = and(0b10000010, 0b01101111);
console.log(numToBin(res));
// Expected output: "00000010"
},
);
function numToBin(num) {
return (num >>> 0).toString(2).padStart(8, "0");
}
Syntax
wasm
;; load two numbers onto the stack
i32.const 5 ;; 00000101
i32.const 3 ;; 00000011
;; perform a bitwise AND
i32.and
;; the top item on the stack will now be 1 (00000001)
Anweisung | Binärer Opcode |
---|---|
i32.and |
0x71 |
i64.and |
0x83 |