simd-test.js

var a = SIMD.Float32x4(1.0,2.0,3.0,4.0);
var b = SIMD.Float32x4(5.0,6.0,7.0,8.0);
var c = SIMD.Float32x4.add(a,b);
console.log(SIMD.Float32x4.extractLane(c, 0));
console.log(SIMD.Float32x4.extractLane(c, 1));
console.log(SIMD.Float32x4.extractLane(c, 2));
console.log(SIMD.Float32x4.extractLane(c, 3));

var a = SIMD.Int32x4(1,2,3,4);
var b = SIMD.Int32x4(5,6,7,8);
var c = SIMD.Int32x4.add(a,b);
console.log(SIMD.Int32x4.extractLane(c, 0));
console.log(SIMD.Int32x4.extractLane(c, 1));
console.log(SIMD.Int32x4.extractLane(c, 2));
console.log(SIMD.Int32x4.extractLane(c, 3));

var a = SIMD.Float64x2(1.0,2.0);
var b = SIMD.Float64x2(5.0,6.0);
var c = SIMD.Float64x2.add(a,b);
console.log(SIMD.Float64x2.extractLane(c, 0));
console.log(SIMD.Float64x2.extractLane(c, 1));

var N = 16;
var ary = new Int32Array(N);
for (var i = 0; i < N; i++) {
  ary[i] = i;
}

var a = SIMD.Int32x4.load(ary, 0);
var b = SIMD.Int32x4.load(ary, 4);
var c = SIMD.Int32x4.add(a, b);
SIMD.Int32x4.store(ary, 8, c);
console.log(ary);