src/v8/test/mjsunit/asm/math-max.js

// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

function Module(stdlib) {
  "use asm";

  var max = stdlib.Math.max;
  var fround = stdlib.Math.fround;

  // f: double, double -> double
  function f(a, b) {
    a = +a; b = +b;
    return +max(a, b);
  }

  // g: signed, signed -> signed
  function g(a, b) {
    a = a | 0; b = b | 0;
    return max(a >> 0, b >> 0) | 0;
  }

  // h: float, float -> float
  function h(a, b) {
    a = fround(a); b = fround(b);
    return fround(max(a, b));
  }

  return { f: f, g: g, h: h };
}

var m = Module({ Math: Math });
var f = m.f;
var g = m.g;
var h = m.h;

assertTrue(isNaN(f(0, NaN)));
assertFalse(isFinite(f(0, Infinity)));
assertTrue(isFinite(f(0, -Infinity)));

assertTrue(Object.is(+0, f(-0, +0)));
assertTrue(Object.is(+0, f(+0, -0)));

assertEquals(0.1,  f( 0,    0.1));
assertEquals(0.5,  f( 0.1,  0.5));
assertEquals(0.5,  f( 0.5, -0.1));
assertEquals(-0.1, f(-0.1, -0.5));
assertEquals(1,    f(-0.5,  1));
assertEquals(1.1,  f( 1,    1.1));
assertEquals(1.1,  f( 1.1, -1));
assertEquals(-1,   f(-1,   -1.1));
assertEquals(0,    f(-1.1,  0));

assertEquals( 1, g( 0,  1));
assertEquals( 5, g( 1,  5));
assertEquals( 5, g( 5, -1));
assertEquals(-1, g(-1, -5));
assertEquals( 1, g(-5,  1));
assertEquals( 1, g( 1, -1));
assertEquals( 0, g(-1,  0));

assertEquals(Math.fround(0.1),  h( 0,    0.1));
assertEquals(Math.fround(0.5),  h( 0.1,  0.5));
assertEquals(Math.fround(0.5),  h( 0.5, -0.1));
assertEquals(Math.fround(-0.1), h(-0.1, -0.5));
assertEquals(Math.fround(1),    h(-0.5,  1));
assertEquals(Math.fround(1.1),  h( 1,    1.1));
assertEquals(Math.fround(1.1),  h( 1.1, -1));
assertEquals(Math.fround(-1),   h(-1,   -1.1));
assertEquals(Math.fround(0),    h(-1.1,  0));

assertEquals(1, g(0, Number.MIN_SAFE_INTEGER));
assertEquals(0, g(0, Number.MAX_SAFE_INTEGER));

assertEquals(Number.MAX_VALUE, f(Number.MIN_VALUE, Number.MAX_VALUE));
assertEquals(Number.MAX_VALUE, f(Number.MAX_VALUE, Number.MIN_VALUE));
assertEquals(Number.POSITIVE_INFINITY, f(Number.POSITIVE_INFINITY, 0));
assertEquals(0, f(Number.NEGATIVE_INFINITY, 0));