Function memory64

deps/v8/test/mjsunit/wasm/multi-memory64.js:222–223

(offset, size)

  let memory32 = (offset, size) =>
      Array.from(new Uint8Array(mem32.buffer.slice(offset, offset + size)));
  let memory64 = (offset, size) =>
      Array.from(new Uint8Array(mem64.buffer.slice(offset, offset + size)));

  // Init mem32[3] to 11.
  new Uint8Array(mem32.buffer)[3] = 11;