webgpu-sandbox/float3test.html at main · jowens/webgpu-sandbox · GitHub

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<!DOCTYPE html>

<html>
  <head>
    <meta charset="utf-8" />
    <title>Float 3 Adds Test</title>
  </head>

  <body>
    <script type="module">
      const a = 0.7221859097480774;
      const b = 0.1175905168056488;
      const c = -0.8397552371025085;
      const ar = Math.fround(a);
      const br = Math.fround(b);
      const cr = Math.fround(c);
      console.log("a b c", a, b, c);
      console.log("a+b+c", a + b + c);
      console.log("a+(b+c)", a + (b + c));
      console.log("ar+br+cr", ar + br + cr);
      console.log("ar+(br+cr)", ar + (br + cr));

      let f32a = new Float32Array([
        0.7221859097480774, 0.1175905168056488, -0.8397552371025085,
      ]);
      console.log("f32a: a+b+c", f32a[0] + f32a[1] + f32a[2]);

      const sm = 0.000001;
      const lg = 1000000;
      console.log("sm + lg", sm + lg);
      const smr = Math.fround(sm);
      const lgr = Math.fround(lg);
      console.log("smr + lgr", smr + lgr);
      let smlg = new Float32Array([sm, lg]);
      let smlgout = new Float32Array(1);
      console.log("f32: sm + lg", smlg[0] + smlg[1]);
      smlgout[0] = smlg[0] + smlg[1];
      console.log("f32: Float32Array(sm + lg)", smlgout[0]);

      const f32array = new Float32Array(3);
      const op = (a, b) => {
        f32array[1] = a;
        f32array[2] = b;
        f32array[0] = f32array[1] + f32array[2];
        return f32array[0];
      };
      console.log("op: f32: Float32Array(sm + lg)", op(sm, lg));

      const t0 = new Float32Array(1);
      const t1 = new Float32Array(1);
      const t2 = new Float32Array(1);
      function fadd(a, b) {
        t0[0] = a;
        t1[0] = b;
        t2[0] = t0[0] + t1[0];
        return t2[0];
      }
      console.log("fadd op: f32: Float32Array(sm + lg)", fadd(sm, lg));
    </script>
  </body>
</html>