bool
CodeGeneratorX86Shared::visitAbsD(LAbsD *ins)
{
FloatRegister input = ToFloatRegister(ins->input());
JS_ASSERT(input == ToFloatRegister(ins->output()));
// Load a value which is all ones except for the sign bit.
masm.loadConstantDouble(SpecificNaN(0, DoubleSignificandBits), ScratchFloatReg);
masm.andpd(ScratchFloatReg, input);
return true;
}
static void
TestDoublesAreApproximatelyEqual()
{
double epsilon = mozilla::detail::FuzzyEqualsEpsilon<double>::value();
double lessThanEpsilon = epsilon / 2.0;
double moreThanEpsilon = epsilon * 2.0;
// Additive tests using the default epsilon
// ... around 1.0
MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 - lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 + epsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0, 1.0 - epsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0, 1.0 + moreThanEpsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0, 1.0 - moreThanEpsilon));
// ... around 1.0e4 (this is near the upper bound of the range where
// adding moreThanEpsilon will still be representable and return false)
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e4, 1.0e4 + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e4, 1.0e4 + epsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e4, 1.0e4 + moreThanEpsilon));
// ... around 1.0e-25
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-25, 1.0e-25 + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-25, 1.0e-25 + epsilon));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-25, 1.0e-25 + moreThanEpsilon));
// ... straddling 0
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-13, -1.0e-13));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-12, -1.0e-12));
// Using a small epsilon
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-29));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-31));
// Using a big epsilon
MOZ_ASSERT(FuzzyEqualsAdditive(1.0e40, 1.0e40 + 1.0e25, 1.0e26));
MOZ_ASSERT(!FuzzyEqualsAdditive(1.0e40, 1.0e40 + 1.0e25, 1.0e24));
// Multiplicative tests using the default epsilon
// ... around 1.0
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0, 1.0 + lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0, 1.0 - lessThanEpsilon));
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0, 1.0 + epsilon));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0, 1.0 - epsilon));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0, 1.0 + moreThanEpsilon));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0, 1.0 - moreThanEpsilon));
// ... around 1.0e30
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e30, 1.0e30 + (lessThanEpsilon * 1.0e30)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e30, 1.0e30 + (moreThanEpsilon * 1.0e30)));
// ... around 1.0e-30
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-30, 1.0e-30 + (lessThanEpsilon * 1.0e-30)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-30, 1.0e-30 + (moreThanEpsilon * 1.0e-30)));
// ... straddling 0
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-6, -1.0e-6));
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-6, -1.0e-6, 1.0e2));
// Using a small epsilon
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-15));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e-15, 1.0e-15 + 1.0e-30, 1.0e-16));
// Using a big epsilon
MOZ_ASSERT(FuzzyEqualsMultiplicative(1.0e40, 2.0e40, 1.0));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(1.0e40, 2.0e40, 0.1));
// "real world case"
double oneThird = 10.0 / 3.0;
MOZ_ASSERT(FuzzyEqualsAdditive(10.0, 3.0 * oneThird));
MOZ_ASSERT(FuzzyEqualsMultiplicative(10.0, 3.0 * oneThird));
// NaN check
MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificNaN(1, 1), SpecificNaN(1, 1)));
MOZ_ASSERT(!FuzzyEqualsAdditive(SpecificNaN(1, 2), SpecificNaN(0, 8)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificNaN(1, 1), SpecificNaN(1, 1)));
MOZ_ASSERT(!FuzzyEqualsMultiplicative(SpecificNaN(1, 2), SpecificNaN(0, 200)));
}
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());
}
static void
TestPredicates()
{
MOZ_ASSERT(IsNaN(UnspecifiedNaN()));
MOZ_ASSERT(IsNaN(SpecificNaN(1, 17)));;
MOZ_ASSERT(IsNaN(SpecificNaN(0, 0xfffffffffff0fULL)));
MOZ_ASSERT(!IsNaN(0));
MOZ_ASSERT(!IsNaN(-0.0));
MOZ_ASSERT(!IsNaN(1.0));
MOZ_ASSERT(!IsNaN(PositiveInfinity()));
MOZ_ASSERT(!IsNaN(NegativeInfinity()));
MOZ_ASSERT(IsInfinite(PositiveInfinity()));
MOZ_ASSERT(IsInfinite(NegativeInfinity()));
MOZ_ASSERT(!IsInfinite(UnspecifiedNaN()));
MOZ_ASSERT(!IsInfinite(0));
MOZ_ASSERT(!IsInfinite(-0.0));
MOZ_ASSERT(!IsInfinite(1.0));
MOZ_ASSERT(!IsFinite(PositiveInfinity()));
MOZ_ASSERT(!IsFinite(NegativeInfinity()));
MOZ_ASSERT(!IsFinite(UnspecifiedNaN()));
MOZ_ASSERT(IsFinite(0));
MOZ_ASSERT(IsFinite(-0.0));
MOZ_ASSERT(IsFinite(1.0));
MOZ_ASSERT(!IsNegative(PositiveInfinity()));
MOZ_ASSERT(IsNegative(NegativeInfinity()));
MOZ_ASSERT(IsNegative(-0.0));
MOZ_ASSERT(!IsNegative(0.0));
MOZ_ASSERT(IsNegative(-1.0));
MOZ_ASSERT(!IsNegative(1.0));
MOZ_ASSERT(!IsNegativeZero(PositiveInfinity()));
MOZ_ASSERT(!IsNegativeZero(NegativeInfinity()));
MOZ_ASSERT(!IsNegativeZero(SpecificNaN(1, 17)));;
MOZ_ASSERT(!IsNegativeZero(SpecificNaN(1, 0xfffffffffff0fULL)));
MOZ_ASSERT(!IsNegativeZero(SpecificNaN(0, 17)));;
MOZ_ASSERT(!IsNegativeZero(SpecificNaN(0, 0xfffffffffff0fULL)));
MOZ_ASSERT(!IsNegativeZero(UnspecifiedNaN()));
MOZ_ASSERT(IsNegativeZero(-0.0));
MOZ_ASSERT(!IsNegativeZero(0.0));
MOZ_ASSERT(!IsNegativeZero(-1.0));
MOZ_ASSERT(!IsNegativeZero(1.0));
int32_t i;
MOZ_ASSERT(DoubleIsInt32(0.0, &i)); MOZ_ASSERT(i == 0);
MOZ_ASSERT(!DoubleIsInt32(-0.0, &i));
MOZ_ASSERT(DoubleEqualsInt32(0.0, &i)); MOZ_ASSERT(i == 0);
MOZ_ASSERT(DoubleEqualsInt32(-0.0, &i)); MOZ_ASSERT(i == 0);
MOZ_ASSERT(DoubleIsInt32(INT32_MIN, &i)); MOZ_ASSERT(i == INT32_MIN);
MOZ_ASSERT(DoubleIsInt32(INT32_MAX, &i)); MOZ_ASSERT(i == INT32_MAX);
MOZ_ASSERT(DoubleEqualsInt32(INT32_MIN, &i)); MOZ_ASSERT(i == INT32_MIN);
MOZ_ASSERT(DoubleEqualsInt32(INT32_MAX, &i)); MOZ_ASSERT(i == INT32_MAX);
MOZ_ASSERT(!DoubleIsInt32(0.5, &i));
MOZ_ASSERT(!DoubleIsInt32(double(INT32_MAX) + 0.1, &i));
MOZ_ASSERT(!DoubleIsInt32(double(INT32_MIN) - 0.1, &i));
MOZ_ASSERT(!DoubleIsInt32(NegativeInfinity(), &i));
MOZ_ASSERT(!DoubleIsInt32(PositiveInfinity(), &i));
MOZ_ASSERT(!DoubleIsInt32(UnspecifiedNaN(), &i));
MOZ_ASSERT(!DoubleEqualsInt32(0.5, &i));
MOZ_ASSERT(!DoubleEqualsInt32(double(INT32_MAX) + 0.1, &i));
MOZ_ASSERT(!DoubleEqualsInt32(double(INT32_MIN) - 0.1, &i));
MOZ_ASSERT(!DoubleEqualsInt32(NegativeInfinity(), &i));
MOZ_ASSERT(!DoubleEqualsInt32(PositiveInfinity(), &i));
MOZ_ASSERT(!DoubleEqualsInt32(UnspecifiedNaN(), &i));
}