static TOperator getDownConvertOp(const TIntermTyped& intermediate)
{
return getMatrixConstructOp(intermediate);
/* implement EOpConstructMat?x?FromMat if support for glsl <1.20 is needed,
switch (intermediate.getColsCount())
{
case 2:
switch (intermediate.getRowsCount())
{
case 2: return EOpConstructMat2x2FromMat;
case 3: return EOpConstructMat2x3FromMat;
case 4: return EOpConstructMat2x4FromMat;
} break;
case 3:
switch (intermediate.getRowsCount())
{
case 2: return EOpConstructMat3x2FromMat;
case 3: return EOpConstructMat3x3FromMat;
case 4: return EOpConstructMat3x4FromMat;
} break;
case 4:
switch (intermediate.getRowsCount())
{
case 2: return EOpConstructMat4x2FromMat;
case 3: return EOpConstructMat4x3FromMat;
case 4: return EOpConstructMat4x4; //should never need to down convert to mat4
} break;
}
assert(false);
return EOpNull;
*/
}
//
// Establishes the type of the resultant operation, as well as
// makes the operator the correct one for the operands.
//
// Returns false if operator can't work on operands.
//
bool TIntermBinary::promote(TParseContext& ctx)
{
TBasicType type = left->getBasicType();
//
// Arrays have to be exact matches.
//
if ((left->isArray() || right->isArray()) && (left->getType() != right->getType()))
return false;
//
// Base assumption: just make the type the same as the left
// operand. Then only deviations from this need be coded.
//
setType(TType(type, left->getPrecision(), EvqTemporary, left->getColsCount(), left->getRowsCount(), left->isMatrix()));
// The result gets promoted to the highest precision.
TPrecision higherPrecision = GetHigherPrecision(left->getPrecision(), right->getPrecision());
getTypePointer()->setPrecision(higherPrecision);
//
// Array operations.
//
if (left->isArray())
{
switch (op)
{
//
// Promote to conditional
//
case EOpEqual:
case EOpNotEqual:
setType(TType(EbtBool, EbpUndefined));
break;
//
// Set array information.
//
case EOpAssign:
getType().setArraySize(left->getType().getArraySize());
getType().setArrayInformationType(left->getType().getArrayInformationType());
break;
default:
return false;
}
return true;
}
//
// All scalars. Code after this test assumes this case is removed!
//
if (left->isScalar() && right->isScalar())
{
switch (op)
{
//
// Promote to conditional
//
case EOpEqual:
case EOpNotEqual:
case EOpLessThan:
case EOpGreaterThan:
case EOpLessThanEqual:
case EOpGreaterThanEqual:
setType(TType(EbtBool, EbpUndefined));
break;
//
// And and Or operate on conditionals
//
case EOpLogicalAnd:
case EOpLogicalOr:
if (left->getBasicType() != EbtBool || right->getBasicType() != EbtBool)
return false;
setType(TType(EbtBool, EbpUndefined));
break;
//
// Check for integer only operands.
//
case EOpRightShift:
case EOpLeftShift:
case EOpAnd:
case EOpInclusiveOr:
case EOpExclusiveOr:
if (left->getBasicType() != EbtInt || right->getBasicType() != EbtInt)
return false;
break;
case EOpModAssign:
case EOpAndAssign:
case EOpInclusiveOrAssign:
case EOpExclusiveOrAssign:
case EOpLeftShiftAssign:
case EOpRightShiftAssign:
if (left->getBasicType() != EbtInt || right->getBasicType() != EbtInt)
return false;
// fall through
//
// Everything else should have matching types
//
default:
if (left->getBasicType() != right->getBasicType() ||
left->isMatrix() != right->isMatrix())
return false;
}
return true;
}
// this is not an allowed promotion : float3x4 * float4x3
if (left->getRowsCount() != right->getRowsCount() && left->getColsCount() != right->getColsCount() &&
(left->getRowsCount() > right->getRowsCount()) != (left->getColsCount() > right->getColsCount()))
return false;
//determine if this is an assignment
bool assignment = ( op >= EOpAssign && op <= EOpRightShiftAssign) ? true : false;
// find size of the resulting value
int cols = 0;
int rows = 0;
if (!left->isScalar() && !right->isScalar()) // no scalars, so downcast of the larger type
{
cols = std::min(left->getColsCount(), right->getColsCount());
rows = std::min(left->getRowsCount(), right->getRowsCount());
}
else
{
cols = std::max(left->getColsCount(), right->getColsCount());
rows = std::max(left->getRowsCount(), right->getRowsCount());
}
assert(cols > 0);
assert(rows > 0);
//
// Downcast needed ?
//
if ( left->getColsCount() > cols || left->getRowsCount() > rows)
{
if (assignment)
return false; //can't promote the destination
//down convert left to match right
TOperator convert = EOpNull;
if (left->getTypePointer()->isMatrix())
{
convert = getMatrixConstructOp(*right, ctx);
if (convert == EOpNull)
return false;
}
else if (left->getTypePointer()->isVector())
{
switch (right->getTypePointer()->getBasicType())
{
case EbtBool: convert = TOperator( EOpConstructBVec2 + rows - 2); break;
case EbtInt: convert = TOperator( EOpConstructIVec2 + rows - 2); break;
case EbtFloat: convert = TOperator( EOpConstructVec2 + rows - 2); break;
default: break;
}
}
else
{
assert(0); //size 1 case should have been handled
}
TIntermAggregate *node = new TIntermAggregate(convert);
node->setLine(left->getLine());
node->setType(TType(left->getBasicType(), left->getPrecision(), EvqTemporary,
right->getColsCount(), right->getRowsCount(), left->isMatrix()));
node->getNodes().push_back(left);
left = node;
//now reset this node's type
setType(TType(left->getBasicType(), left->getPrecision(), EvqTemporary,
right->getColsCount(), right->getRowsCount(), left->isMatrix()));
}
else if ( right->getColsCount() > cols || right->getRowsCount() > rows)
{
//down convert right to match left
TOperator convert = EOpNull;
if (right->getTypePointer()->isMatrix())
{
convert = getMatrixConstructOp(*left, ctx);
if (convert == EOpNull)
return false;
}
else if (right->getTypePointer()->isVector())
{
switch (left->getTypePointer()->getBasicType())
{
case EbtBool: convert = TOperator( EOpConstructBVec2 + rows - 2); break;
case EbtInt: convert = TOperator( EOpConstructIVec2 + rows - 2); break;
case EbtFloat: convert = TOperator( EOpConstructVec2 + rows - 2); break;
default: break;
}
}
else
{
assert(0); //size 1 case should have been handled
}
TIntermAggregate *node = new TIntermAggregate(convert);
node->setLine(right->getLine());
node->setType(TType(right->getBasicType(), right->getPrecision(), EvqTemporary,
left->getColsCount(), left->getRowsCount(), right->isMatrix()));
node->getNodes().push_back(right);
right = node;
}
//
// Can these two operands be combined?
//
switch (op)
{
case EOpMul:
if (!left->isMatrix() && right->isMatrix())
{
if (left->isVector())
op = EOpVectorTimesMatrix;
else
{
op = EOpMatrixTimesScalar;
setType(TType(type, higherPrecision, EvqTemporary, cols, rows, true));
}
}
else if (left->isMatrix() && !right->isMatrix())
{
if (right->isVector())
{
op = EOpMatrixTimesVector;
setType(TType(type, higherPrecision, EvqTemporary, cols, rows, false));
}
else
{
op = EOpMatrixTimesScalar;
}
}
else if (left->isMatrix() && right->isMatrix())
{
op = EOpMatrixTimesMatrix;
}
else if (!left->isMatrix() && !right->isMatrix())
{
if (left->isVector() && right->isVector())
{
// leave as component product
}
else if (left->isVector() || right->isVector())
{
op = EOpVectorTimesScalar;
setType(TType(type, higherPrecision, EvqTemporary, cols, rows, false));
}
}
else
{
ctx.infoSink.info.message(EPrefixInternalError, "Missing elses", getLine());
return false;
}
break;
case EOpMulAssign:
if (!left->isMatrix() && right->isMatrix())
{
if (left->isVector())
op = EOpVectorTimesMatrixAssign;
else
{
return false;
}
}
else if (left->isMatrix() && !right->isMatrix())
{
if (right->isVector())
{
return false;
}
else
{
op = EOpMatrixTimesScalarAssign;
}
}
else if (left->isMatrix() && right->isMatrix())
{
op = EOpMatrixTimesMatrixAssign;
}
else if (!left->isMatrix() && !right->isMatrix())
{
if (left->isVector() && right->isVector())
{
// leave as component product
}
else if (left->isVector() || right->isVector())
{
if (! left->isVector())
return false;
op = EOpVectorTimesScalarAssign;
setType(TType(type, higherPrecision, EvqTemporary, cols, rows, false));
}
}
else
{
ctx.infoSink.info.message(EPrefixInternalError, "Missing elses", getLine());
return false;
}
break;
case EOpAssign:
if ( left->getColsCount() != right->getColsCount() ||
left->getRowsCount() != right->getRowsCount())
{
//right needs to be forced to match left
TOperator convert = EOpNull;
if (left->isMatrix() )
{
convert = getMatrixConstructOp(*left, ctx);
if (convert == EOpNull)
return false;
}
else if (left->isVector() )
{
switch (left->getTypePointer()->getBasicType())
{
case EbtBool: convert = TOperator( EOpConstructBVec2 + left->getRowsCount() - 2); break;
case EbtInt: convert = TOperator( EOpConstructIVec2 + left->getRowsCount() - 2); break;
case EbtFloat: convert = TOperator( EOpConstructVec2 + left->getRowsCount() - 2); break;
default: break;
}
}
else
{
switch (left->getTypePointer()->getBasicType())
{
case EbtBool: convert = EOpConstructBool; break;
case EbtInt: convert = EOpConstructInt; break;
case EbtFloat: convert = EOpConstructFloat; break;
default: break;
}
}
assert( convert != EOpNull);
TIntermAggregate *node = new TIntermAggregate(convert);
node->setLine(right->getLine());
node->setType(TType(left->getBasicType(), left->getPrecision(), right->getQualifier() == EvqConst ? EvqConst : EvqTemporary,
left->getColsCount(), left->getRowsCount(), left->isMatrix()));
node->getNodes().push_back(right);
right = node;
cols = right->getColsCount();
rows = right->getRowsCount();
}
// fall through
case EOpMod:
case EOpAdd:
case EOpSub:
case EOpDiv:
case EOpAddAssign:
case EOpSubAssign:
case EOpDivAssign:
case EOpModAssign:
if (op == EOpMod)
type = EbtFloat;
if ((left->isMatrix() && right->isVector()) ||
(left->isVector() && right->isMatrix()) ||
left->getBasicType() != right->getBasicType())
return false;
setType(TType(type, left->getPrecision(), EvqTemporary, cols, rows, left->isMatrix() || right->isMatrix()));
break;
case EOpEqual:
case EOpNotEqual:
case EOpLessThan:
case EOpGreaterThan:
case EOpLessThanEqual:
case EOpGreaterThanEqual:
if ((left->isMatrix() && right->isVector()) ||
(left->isVector() && right->isMatrix()) ||
left->getBasicType() != right->getBasicType())
return false;
setType(TType(EbtBool, higherPrecision, EvqTemporary, cols, rows, false));
break;
default:
return false;
}
//
// One more check for assignment. The Resulting type has to match the left operand.
//
switch (op)
{
case EOpAssign:
case EOpAddAssign:
case EOpSubAssign:
case EOpMulAssign:
case EOpDivAssign:
case EOpModAssign:
case EOpAndAssign:
case EOpInclusiveOrAssign:
case EOpExclusiveOrAssign:
case EOpLeftShiftAssign:
case EOpRightShiftAssign:
if (getType() != left->getType())
return false;
break;
default:
break;
}
return true;
}