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Interpreter: simplify fres

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This commit is contained in:
Tillmann Karras 2015-06-25 22:29:31 +02:00
parent 174ada3a62
commit b78310bbe5
1 changed files with 4 additions and 4 deletions
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8
Source/Core/Common/MathUtil.cpp
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@ -209,23 +209,23 @@ double ApproximateReciprocal(double val)
// Special case 0
if (mantissa == 0 && exponent == 0)
return sign ? -std::numeric_limits<double>::infinity() : std::numeric_limits<double>::infinity();
return std::copysign(std::numeric_limits<double>::infinity(), valf);
// Special case NaN-ish numbers
if (exponent == (0x7FFLL << 52))
{
if (mantissa == 0)
return sign ? -0.0 : 0.0;
return std::copysign(0.0, valf);
return 0.0 + valf;
}
// Special case small inputs
if (exponent < (895LL << 52))
return sign ? -std::numeric_limits<float>::max() : std::numeric_limits<float>::max();
return std::copysign(std::numeric_limits<float>::max(), valf);
// Special case large inputs
if (exponent >= (1149LL << 52))
return sign ? -0.0f : 0.0f;
return std::copysign(0.0, valf);
exponent = (0x7FDLL << 52) - exponent;