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105 lines
4.0 KiB
C++
105 lines
4.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/FloatingPoint.h"
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#include <math.h>
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using mozilla::DoublesAreIdentical;
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using mozilla::NegativeInfinity;
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using mozilla::PositiveInfinity;
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using mozilla::SpecificNaN;
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using mozilla::UnspecifiedNaN;
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static void
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ShouldBeIdentical(double d1, double d2)
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{
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MOZ_ASSERT(DoublesAreIdentical(d1, d2));
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MOZ_ASSERT(DoublesAreIdentical(d2, d1));
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}
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static void
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ShouldNotBeIdentical(double d1, double d2)
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{
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MOZ_ASSERT(!DoublesAreIdentical(d1, d2));
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MOZ_ASSERT(!DoublesAreIdentical(d2, d1));
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}
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static void
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TestDoublesAreIdentical()
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{
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ShouldBeIdentical(+0.0, +0.0);
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ShouldBeIdentical(-0.0, -0.0);
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ShouldNotBeIdentical(+0.0, -0.0);
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ShouldBeIdentical(1.0, 1.0);
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ShouldNotBeIdentical(-1.0, 1.0);
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ShouldBeIdentical(4294967295.0, 4294967295.0);
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ShouldNotBeIdentical(-4294967295.0, 4294967295.0);
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ShouldBeIdentical(4294967296.0, 4294967296.0);
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ShouldBeIdentical(4294967297.0, 4294967297.0);
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ShouldBeIdentical(1e300, 1e300);
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ShouldBeIdentical(PositiveInfinity(), PositiveInfinity());
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ShouldBeIdentical(NegativeInfinity(), NegativeInfinity());
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ShouldNotBeIdentical(PositiveInfinity(), NegativeInfinity());
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ShouldNotBeIdentical(-0.0, NegativeInfinity());
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ShouldNotBeIdentical(+0.0, NegativeInfinity());
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ShouldNotBeIdentical(1e300, NegativeInfinity());
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ShouldNotBeIdentical(3.141592654, NegativeInfinity());
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ShouldBeIdentical(UnspecifiedNaN(), UnspecifiedNaN());
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ShouldBeIdentical(-UnspecifiedNaN(), UnspecifiedNaN());
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ShouldBeIdentical(UnspecifiedNaN(), -UnspecifiedNaN());
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 42));
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ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(1, 42));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(1, 42));
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ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(0, 42));
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const uint64_t Mask = 0xfffffffffffffULL;
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for (unsigned i = 0; i < 52; i++) {
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for (unsigned j = 0; j < 52; j++) {
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for (unsigned sign = 0; i < 2; i++) {
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ShouldBeIdentical(SpecificNaN(0, 1ULL << i), SpecificNaN(sign, 1ULL << j));
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ShouldBeIdentical(SpecificNaN(1, 1ULL << i), SpecificNaN(sign, 1ULL << j));
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ShouldBeIdentical(SpecificNaN(0, Mask & ~(1ULL << i)),
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SpecificNaN(sign, Mask & ~(1ULL << j)));
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ShouldBeIdentical(SpecificNaN(1, Mask & ~(1ULL << i)),
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SpecificNaN(sign, Mask & ~(1ULL << j)));
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}
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}
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}
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x8000000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x4000000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x2000000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x1000000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0800000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0400000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0200000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0100000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0080000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0040000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0020000000000ULL));
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ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0010000000000ULL));
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ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(0, 0xff0ffffffffffULL));
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ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(0, 0xfffffffffff0fULL));
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ShouldNotBeIdentical(UnspecifiedNaN(), +0.0);
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ShouldNotBeIdentical(UnspecifiedNaN(), -0.0);
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ShouldNotBeIdentical(UnspecifiedNaN(), 1.0);
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ShouldNotBeIdentical(UnspecifiedNaN(), -1.0);
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ShouldNotBeIdentical(UnspecifiedNaN(), PositiveInfinity());
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ShouldNotBeIdentical(UnspecifiedNaN(), NegativeInfinity());
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}
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int
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main()
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{
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TestDoublesAreIdentical();
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}
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