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HLSL: Support 1.#INF and -1.#INF syntax.

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This commit is contained in:
John Kessenich 2017-04-12 13:26:57 -06:00
parent b5e739c20e
commit 776c515ea5
8 changed files with 256 additions and 16 deletions
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39
glslang/MachineIndependent/intermOut.cpp
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@ -45,11 +45,31 @@
namespace {
bool is_positive_infinity(double x) {
bool IsInfinity(double x) {
#ifdef _MSC_VER
return _fpclass(x) == _FPCLASS_PINF;
switch (_fpclass(x)) {
case _FPCLASS_NINF:
case _FPCLASS_PINF:
return true;
default:
return false;
}
#else
return std::isinf(x) && (x >= 0);
return std::isinf(x);
#endif
}
bool IsNan(double x) {
#ifdef _MSC_VER
switch (_fpclass(x)) {
case _FPCLASS_SNAN:
case _FPCLASS_QNAN:
return true;
default:
return false;
}
#else
return std::isnan(x);
#endif
}
@ -694,11 +714,14 @@ static void OutputConstantUnion(TInfoSink& out, const TIntermTyped* node, const
#endif
{
const double value = constUnion[i].getDConst();
// Print infinity in a portable way, for test stability.
// Other cases may be needed in the future: negative infinity,
// and NaNs.
if (is_positive_infinity(value))
out.debug << "inf\n";
// Print infinities and NaNs in a portable way.
if (IsInfinity(value)) {
if (value < 0)
out.debug << "-1.#INF\n";
else
out.debug << "+1.#INF\n";
} else if (IsNan(value))
out.debug << "1.#IND\n";
else {
const int maxSize = 300;
char buf[maxSize];