本文整理汇总了C++中mozilla::SpecificFloatNaN方法的典型用法代码示例。如果您正苦于以下问题：C++ mozilla::SpecificFloatNaN方法的具体用法？C++ mozilla::SpecificFloatNaN怎么用？C++ mozilla::SpecificFloatNaN使用的例子？那么, 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::SpecificFloatNaN方法的2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::visitAbsF(LAbsF *ins)
{
FloatRegister input = ToFloatRegister(ins->input());
JS_ASSERT(input == ToFloatRegister(ins->output()));
// Same trick as visitAbsD above.
masm.loadConstantFloat32(SpecificFloatNaN(0, FloatSignificandBits), ScratchFloatReg);
masm.andps(ScratchFloatReg, input);
return true;
}示例2: SpecificFloatNaN
static void
TestFloatsAreApproximatelyEqual()
{
float epsilon = mozilla::detail::FuzzyEqualsEpsilon<float>::value();
float lessThanEpsilon = epsilon / 2.0f;
float moreThanEpsilon = epsilon * 2.0f;
// Additive tests using the default epsilon
// ... around 1.0
MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f - lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f + epsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0f, 1.0f - epsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0f, 1.0f + moreThanEpsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0f, 1.0f - moreThanEpsilon));
// ... around 1.0e2 (this is near the upper bound of the range where
// adding moreThanEpsilon will still be representable and return false)
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e2f, 1.0e2f + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e2f, 1.0e2f + epsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e2f, 1.0e2f + moreThanEpsilon));
// ... around 1.0e-10
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-10f, 1.0e-10f + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-10f, 1.0e-10f + epsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-10f, 1.0e-10f + moreThanEpsilon));
// ... straddling 0
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-6f, -1.0e-6f));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-5f, -1.0e-5f));
// Using a small epsilon
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-9f));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-11f));
// Using a big epsilon
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e20f, 1.0e20f + 1.0e15f, 1.0e16f));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e20f, 1.0e20f + 1.0e15f, 1.0e14f));
// Multiplicative tests using the default epsilon
// ... around 1.0
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 1.0f + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 1.0f - lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 1.0f + epsilon));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 1.0f - epsilon));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 1.0f + moreThanEpsilon));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 1.0f - moreThanEpsilon));
// ... around 1.0e10
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e10f, 1.0e10f + (lessThanEpsilon * 1.0e10f)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e10f, 1.0e10f + (moreThanEpsilon * 1.0e10f)));
// ... around 1.0e-10
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-10f, 1.0e-10f + (lessThanEpsilon * 1.0e-10f)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-10f, 1.0e-10f + (moreThanEpsilon * 1.0e-10f)));
// ... straddling 0
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-6f, -1.0e-6f));
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-6f, -1.0e-6f, 1.0e2f));
// Using a small epsilon
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-4f));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-5f, 1.0e-5f + 1.0e-10f, 1.0e-5f));
// Using a big epsilon
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0f, 2.0f, 1.0f));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0f, 2.0f, 0.1f));
// "real world case"
float oneThird = 10.0f / 3.0f;
MOZ_ASSERT(FuzzyEqualsAdditive(10.0f, 3.0f * oneThird));
MOZ_ASSERT(FuzzyEqualsMultiplicative(10.0f, 3.0f * oneThird));
// NaN check
MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificFloatNaN(1, 1), SpecificFloatNaN(1, 1)));
MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificFloatNaN(1, 2), SpecificFloatNaN(0, 8)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificFloatNaN(1, 1), SpecificFloatNaN(1, 1)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificFloatNaN(1, 2), SpecificFloatNaN(0, 200)));
}