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Constant.cpp Floating point divide by zero

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Constant.cpp will throw a floating point divide by zero if floating point exceptions are enabled in Win32 causing the program to crash. This fix manually checks the right-hand argument of the division and sets appropriate Infinity, Negative Infinity, or NAN as if the floating point exceptions were disabled.
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Haydn Trigg 2018-06-29 13:55:06 -04:00 • committed by GitHub
parent 0b964b3c35
commit e826286f99
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GPG key ID: 4AEE18F83AFDEB23
1 changed files with 21 additions and 1 deletions
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22
glslang/MachineIndependent/Constant.cpp
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@ -179,7 +179,27 @@ TIntermTyped* TIntermConstantUnion::fold(TOperator op, const TIntermTyped* right
case EbtDouble:
case EbtFloat:
case EbtFloat16:
newConstArray[i].setDConst(leftUnionArray[i].getDConst() / rightUnionArray[i].getDConst());
{
auto right = rightUnionArray[i].getDConst();
auto left = leftUnionArray[i].getDConst();
if (right)
{
newConstArray[i].setDConst(left / right);
}
else if (left > 0)
{
newConstArray[i].setDConst((double)INFINITY);
}
else if (left < 0)
{
newConstArray[i].setDConst((double)-INFINITY);
}
else
{
newConstArray[i].setDConst((double)NAN);
}
}
break;
case EbtInt8:
if (rightUnionArray[i] == (signed char)0)