math-fround.js - mozsearch

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// |jit-test| --canonicalize-nan-at-uses=on

load(libdir + "nans.js");

function testUnary(fn) {

  testWithFloatTypedArrays((FloatArray, UintArray, NaNs, UnaryMath) => {

    var f = new FloatArray(2);

    var u = new UintArray(f.buffer);

    for (var i = 0; i < 100; ++i) {

      u[0] = NaNs[i % NaNs.length];

      var x = UnaryMath(f[0]);

      // Store possibly tainted value.

      f[1] = x;

      assertEq(f[1], NaN);

      assertEq(x, NaN);

      // We can't assert same NaN payload, because rounding modifies the payload.

  }, fn);

testUnary(Math.fround);

testUnary(Math.f16round);