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C++ mozilla::NegativeInfinity方法代码示例

本文整理汇总了C++中mozilla::NegativeInfinity方法的典型用法代码示例。如果您正苦于以下问题：C++ mozilla::NegativeInfinity方法的具体用法？C++ mozilla::NegativeInfinity怎么用？C++ mozilla::NegativeInfinity使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类mozilla的用法示例。


在下文中一共展示了mozilla::NegativeInfinity方法的5个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: ToFloatRegister

bool
CodeGeneratorX86Shared::visitPowHalfD(LPowHalfD *ins)
{
    FloatRegister input = ToFloatRegister(ins->input());
    JS_ASSERT(input == ToFloatRegister(ins->output()));

    Label done, sqrt;

    // Branch if not -Infinity.
    masm.loadConstantDouble(NegativeInfinity(), ScratchFloatReg);
    masm.branchDouble(Assembler::DoubleNotEqualOrUnordered, input, ScratchFloatReg, &sqrt);

    // Math.pow(-Infinity, 0.5) == Infinity.
    masm.xorpd(input, input);
    masm.subsd(ScratchFloatReg, input);
    masm.jump(&done);

    // Math.pow(-0, 0.5) == 0 == Math.pow(0, 0.5). Adding 0 converts any -0 to 0.
    masm.bind(&sqrt);
    masm.xorpd(ScratchFloatReg, ScratchFloatReg);
    masm.addsd(ScratchFloatReg, input);
    masm.sqrtsd(input, input);

    masm.bind(&done);
    return true;
}
开发者ID:jonathanmarvens，项目名称:mozilla-central，代码行数:26，代码来源:CodeGenerator-x86-shared.cpp

示例2: 

static void
TestExponentComponent()
{
  MOZ_ASSERT(ExponentComponent(0.0) == -int_fast16_t(DoubleExponentBias));
  MOZ_ASSERT(ExponentComponent(-0.0) == -int_fast16_t(DoubleExponentBias));
  MOZ_ASSERT(ExponentComponent(0.125) == -3);
  MOZ_ASSERT(ExponentComponent(0.5) == -1);
  MOZ_ASSERT(ExponentComponent(1.0) == 0);
  MOZ_ASSERT(ExponentComponent(1.5) == 0);
  MOZ_ASSERT(ExponentComponent(2.0) == 1);
  MOZ_ASSERT(ExponentComponent(7) == 2);
  MOZ_ASSERT(ExponentComponent(PositiveInfinity()) == DoubleExponentBias + 1);
  MOZ_ASSERT(ExponentComponent(NegativeInfinity()) == DoubleExponentBias + 1);
  MOZ_ASSERT(ExponentComponent(UnspecifiedNaN()) == DoubleExponentBias + 1);
}
开发者ID:，项目名称:，代码行数:15，代码来源:

示例3: CallArgsFromVp

bool
js_math_max(JSContext *cx, unsigned argc, Value *vp)
{
    CallArgs args = CallArgsFromVp(argc, vp);

    double maxval = NegativeInfinity();
    for (unsigned i = 0; i < args.length(); i++) {
        double x;
        if (!ToNumber(cx, args[i], &x))
            return false;
        // Math.max(num, NaN) => NaN, Math.max(-0, +0) => +0
        if (x > maxval || IsNaN(x) || (x == maxval && IsNegative(maxval)))
            maxval = x;
    }
    args.rval().setNumber(maxval);
    return true;
}
开发者ID:，项目名称:，代码行数:17，代码来源:

示例4: mainThread


//.........这里部分代码省略.........
    gcAbortSweepAfterCurrentGroup(false),
    gcArenasAllocatedDuringSweep(nullptr),
#ifdef DEBUG
    gcMarkingValidator(nullptr),
#endif
    gcInterFrameGC(0),
    gcSliceBudget(SliceBudget::Unlimited),
    gcIncrementalEnabled(true),
    gcGenerationalEnabled(true),
    gcManipulatingDeadZones(false),
    gcObjectsMarkedInDeadZones(0),
    gcPoke(false),
    heapState(Idle),
#ifdef JSGC_GENERATIONAL
    gcNursery(thisFromCtor()),
    gcStoreBuffer(thisFromCtor(), gcNursery),
#endif
#ifdef JS_GC_ZEAL
    gcZeal_(0),
    gcZealFrequency(0),
    gcNextScheduled(0),
    gcDeterministicOnly(false),
    gcIncrementalLimit(0),
#endif
    gcValidate(true),
    gcFullCompartmentChecks(false),
    gcCallback(nullptr),
    gcSliceCallback(nullptr),
    gcFinalizeCallback(nullptr),
    gcMallocBytes(0),
    gcMallocGCTriggered(false),
    scriptAndCountsVector(nullptr),
    NaNValue(DoubleNaNValue()),
    negativeInfinityValue(DoubleValue(NegativeInfinity())),
    positiveInfinityValue(DoubleValue(PositiveInfinity())),
    emptyString(nullptr),
    debugMode(false),
    spsProfiler(thisFromCtor()),
    profilingScripts(false),
    alwaysPreserveCode(false),
    hadOutOfMemory(false),
    haveCreatedContext(false),
    data(nullptr),
    gcLock(nullptr),
    gcLockOwner(nullptr),
    gcHelperThread(thisFromCtor()),
    signalHandlersInstalled_(false),
    defaultFreeOp_(thisFromCtor(), false),
    debuggerMutations(0),
    securityCallbacks(const_cast<JSSecurityCallbacks *>(&NullSecurityCallbacks)),
    DOMcallbacks(nullptr),
    destroyPrincipals(nullptr),
    structuredCloneCallbacks(nullptr),
    telemetryCallback(nullptr),
    propertyRemovals(0),
#if !EXPOSE_INTL_API
    thousandsSeparator(0),
    decimalSeparator(0),
    numGrouping(0),
#endif
    heapProtected_(false),
    mathCache_(nullptr),
    activeCompilations_(0),
    keepAtoms_(0),
    trustedPrincipals_(nullptr),
    atomsCompartment_(nullptr),
开发者ID:，项目名称:，代码行数:67，代码来源:

示例5: ShouldBeIdentical

static void
TestDoublesAreIdentical()
{
  ShouldBeIdentical(+0.0, +0.0);
  ShouldBeIdentical(-0.0, -0.0);
  ShouldNotBeIdentical(+0.0, -0.0);

  ShouldBeIdentical(1.0, 1.0);
  ShouldNotBeIdentical(-1.0, 1.0);
  ShouldBeIdentical(4294967295.0, 4294967295.0);
  ShouldNotBeIdentical(-4294967295.0, 4294967295.0);
  ShouldBeIdentical(4294967296.0, 4294967296.0);
  ShouldBeIdentical(4294967297.0, 4294967297.0);
  ShouldBeIdentical(1e300, 1e300);

  ShouldBeIdentical(PositiveInfinity(), PositiveInfinity());
  ShouldBeIdentical(NegativeInfinity(), NegativeInfinity());
  ShouldNotBeIdentical(PositiveInfinity(), NegativeInfinity());

  ShouldNotBeIdentical(-0.0, NegativeInfinity());
  ShouldNotBeIdentical(+0.0, NegativeInfinity());
  ShouldNotBeIdentical(1e300, NegativeInfinity());
  ShouldNotBeIdentical(3.141592654, NegativeInfinity());

  ShouldBeIdentical(UnspecifiedNaN(), UnspecifiedNaN());
  ShouldBeIdentical(-UnspecifiedNaN(), UnspecifiedNaN());
  ShouldBeIdentical(UnspecifiedNaN(), -UnspecifiedNaN());

  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 42));
  ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(1, 42));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(1, 42));
  ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(0, 42));

  const uint64_t Mask = 0xfffffffffffffULL;
  for (unsigned i = 0; i < 52; i++) {
    for (unsigned j = 0; j < 52; j++) {
      for (unsigned sign = 0; i < 2; i++) {
        ShouldBeIdentical(SpecificNaN(0, 1ULL << i), SpecificNaN(sign, 1ULL << j));
        ShouldBeIdentical(SpecificNaN(1, 1ULL << i), SpecificNaN(sign, 1ULL << j));

        ShouldBeIdentical(SpecificNaN(0, Mask & ~(1ULL << i)),
                          SpecificNaN(sign, Mask & ~(1ULL << j)));
        ShouldBeIdentical(SpecificNaN(1, Mask & ~(1ULL << i)),
                          SpecificNaN(sign, Mask & ~(1ULL << j)));
      }
    }
  }
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x8000000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x4000000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x2000000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x1000000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0800000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0400000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0200000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0100000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0080000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0040000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0020000000000ULL));
  ShouldBeIdentical(SpecificNaN(0, 17), SpecificNaN(0, 0x0010000000000ULL));
  ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(0, 0xff0ffffffffffULL));
  ShouldBeIdentical(SpecificNaN(1, 17), SpecificNaN(0, 0xfffffffffff0fULL));

  ShouldNotBeIdentical(UnspecifiedNaN(), +0.0);
  ShouldNotBeIdentical(UnspecifiedNaN(), -0.0);
  ShouldNotBeIdentical(UnspecifiedNaN(), 1.0);
  ShouldNotBeIdentical(UnspecifiedNaN(), -1.0);
  ShouldNotBeIdentical(UnspecifiedNaN(), PositiveInfinity());
  ShouldNotBeIdentical(UnspecifiedNaN(), NegativeInfinity());
}
开发者ID:bcharbonnier，项目名称:mozilla-central，代码行数:69，代码来源:TestFloatingPoint.cpp


注：本文中的mozilla::NegativeInfinity方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。