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Decompose OpIsFinite to avoid capability restrictions

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OpIsFinite is not available everywhere: decompose isfinite
to !isinf && !isnan.
This commit is contained in:
steve-lunarg
2017-04-03 20:05:21 -06:00
parent b68b9a8b23
commit 13975525d7
4 changed files with 192 additions and 0 deletions
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42
hlsl/hlslParseHelper.cpp
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@@ -3860,6 +3860,48 @@ void HlslParseContext::decomposeIntrinsic(const TSourceLoc& loc, TIntermTyped*&
break;
}
case EOpIsFinite:
{
// Since OPIsFinite in SPIR-V is only supported with the Kernel capability, we translate
// it to !isnan && !isinf
TIntermTyped* arg0 = node->getAsUnaryNode()->getOperand();
// We'll make a temporary in case the RHS is cmoplex
TVariable* tempArg = makeInternalVariable("@finitetmp", arg0->getType());
tempArg->getWritableType().getQualifier().makeTemporary();
TIntermTyped* tmpArgAssign = intermediate.addAssign(EOpAssign,
intermediate.addSymbol(*tempArg, loc),
arg0, loc);
TIntermAggregate* compoundStatement = intermediate.makeAggregate(tmpArgAssign, loc);
TIntermTyped* isnan = handleUnaryMath(loc, "isnan", EOpIsNan, intermediate.addSymbol(*tempArg, loc));
isnan->setType(TType(EbtBool));
TIntermTyped* notnan = handleUnaryMath(loc, "!", EOpLogicalNot, isnan);
notnan->setType(TType(EbtBool));
TIntermTyped* isinf = handleUnaryMath(loc, "isinf", EOpIsInf, intermediate.addSymbol(*tempArg, loc));
isinf->setType(TType(EbtBool));
TIntermTyped* notinf = handleUnaryMath(loc, "!", EOpLogicalNot, isinf);
notinf->setType(TType(EbtBool));
TIntermTyped* andNode = handleBinaryMath(loc, "and", EOpLogicalAnd, notnan, notinf);
andNode->setType(TType(EbtBool));
compoundStatement = intermediate.growAggregate(compoundStatement, andNode);
compoundStatement->setOperator(EOpSequence);
compoundStatement->setLoc(loc);
compoundStatement->setType(TType(EbtVoid));
node = compoundStatement;
break;
}
default:
break; // most pass through unchanged
}