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function test() {
const ta = new TypedArray(1);
const T = ta[0].constructor;
const zero = T(0);
const one = T(1);
function cmpxchg_oldval(oldval) {
// Set |oldval| to ensure we don't simply return the MParameter instruction.
oldval = oldval | zero;
// Perform the compare-exchange operation.
Atomics.compareExchange(ta, 0, oldval, zero);
// Return |oldval| to check LCompareExchangeTypedArrayElement didn't modify
// the register value.
return oldval;
}
function cmpxchg_newval(newval) {
// Set |newval| to ensure we don't simply return the MParameter instruction.
newval = newval | zero;
// Perform the compare-exchange operation.
Atomics.compareExchange(ta, 0, zero, newval);
// Return |newval| to check LCompareExchangeTypedArrayElement didn't modify
// the register value.
return newval;
}
for (let i = 0; i < 2; ++i) {
for (let k = 0; k <= 65; ++k) {
let v = one << T(k);
assertEq(cmpxchg_oldval(v), v | zero);
assertEq(cmpxchg_newval(v), v | zero);
}
}
}
const TypedArrays = [
Int8Array,
Uint8Array,
Int16Array,
Uint16Array,
Int32Array,
Uint32Array,
BigInt64Array,
BigUint64Array,
];
for (let TA of TypedArrays) {
let f = Function(`return ${test}`.replaceAll("TypedArray", TA.name))();
f();
}