Assemblyscript: How to share u16/u32/f64... ect on memory?

I just use codes like MDN Example to access memory from AS and JS.
But except u8/i8, all test pattern failed and I saw data shown by JS are different from which shown by AS.

How can I store data in float?

My codes like:

```index.ts
// assembly/index.ts

export function readMemoryU8(offset: usize): u8 {
return load(offset)
}

export function writeMemoryU8(offset: usize, value: u8): void {
store(offset, value)
}

export function readMemoryU16(offset: usize): u16 {
return load(offset)
}

export function writeMemoryU16(offset: usize, value: u16): void {
store(offset, value)
}

export function readMemoryF64(offset: usize): f64 {
return load(offset)
}

export function writeMemoryF64(offset: usize, value: f64): void {
store(offset, value)
}

// ...

```index.js
// index.js

const fs = require("fs");
const compiled = new WebAssembly.Module(fs.readFileSync(__dirname + "/build/optimized.wasm"));
const imports = {};
Object.defineProperty(module, "exports", {
  get: () => new WebAssembly.Instance(compiled, imports).exports
});

```index.test.js
// __tests__/index.test.js

const wasm = require('../index');
const memory = wasm.memory;

describe('Test WASM', () => {
beforeAll(() => {
const mem = new Uint8Array(memory.buffer);
if (mem.length < 1) {
memory.grow(1);
}
wasm.memory.grow(1);
});

test('read / write uint8', () => {
const mem = new Uint8Array(memory.buffer);

mem.set([1, 3, 5]);
console.log([0, 1, 2, 3, 4, 5].map(wasm.readMemoryU8));
// [ 1, 3, 5, 0, 0, 0 ]
console.log(mem.subarray(0, 6));
//Uint8Array [ 1, 3, 5, 0, 0, 0 ]
expect(wasm.readMemoryU8(1)).toBe(3);
wasm.writeMemoryU8(1, 6);
expect(wasm.readMemoryU8(1)).toBe(6);
expect(mem[1]).toBe(6);
expect(wasm.readMemoryU8(0)).toBe(1);
expect(wasm.readMemoryU8(2)).toBe(5);

});

test('read / write uint16', () => {
const mem = new Uint16Array(memory.buffer);

mem.set([1, 3, 257]);
console.log([0, 1, 2, 3, 4, 5].map(wasm.readMemoryU16)); 
// [ 1, 768, 3, 256, 257 ]
console.log(mem.subarray(0, 6)); 
// Uint16Array [ 1, 3, 257, 0, 0, 0 ]
expect(wasm.readMemoryU16(0)).toBe(1);
expect(wasm.readMemoryU16(1)).toBe(3); // failed
wasm.writeMemoryU16(1, 6);
expect(wasm.readMemoryU16(1)).toBe(6);
expect(mem[1]).toBe(6);
expect(wasm.readMemoryU16(2)).toBe(5);

});

test('read / write float64', () => {
const mem = new Float64Array(memory.buffer);

mem.set([1, -3.2, 25.8]);

console.log([0, 1, 2, 3, 4, 5].map(wasm.readMemoryF64));
// [ 1,
//  -3.0065162379579438e-182,
//  -2.413170169815393e-185,
//  -2.3536706995205933e-185,
//  -2.3534382797147542e-185,
//  -2.3534373718248877e-185 ]
console.log(mem.subarray(0, 6));
// Float64Array [ 1, -3.2, 25.8, 0, 0, 0 ]
expect(wasm.readMemoryF64(0)).toBe(1);
expect(wasm.readMemoryF64(1)).toBe(-3.2); // failed
wasm.writeMemoryI16(1, -6.5);
expect(wasm.readMemoryF64(1)).toBe(-6.5);
expect(mem[1]).toBe(-6.5);
expect(wasm.readMemoryI16(2)).toBe(25.8);

});
});

```