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- started refactoring binary operators by starting to movw the relevant parts or ResolveLR into the respective Resolve methods. FxAddSub complete.

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This one-size-fits all function has become too unwieldy with all its special cases and makes improvements harder than necessary.
This commit is contained in:
Christoph Oelckers 2016-11-18 11:28:15 +01:00
parent 8650d6806e
commit a00181c899
1 changed files with 45 additions and 27 deletions
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72
src/scripting/codegeneration/codegen.cpp
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@ -2377,10 +2377,6 @@ bool FxBinary::ResolveLR(FCompileContext& ctx, bool castnumeric)
{
switch (Operator)
{
case '+':
// later
break;
case '<':
case '>':
case TK_Geq:
@ -2421,22 +2417,6 @@ bool FxBinary::ResolveLR(FCompileContext& ctx, bool castnumeric)
{
switch (Operator)
{
case '+':
case '-':
// a vector2 can be added to or subtracted from a vector 3 but it needs to be the right operand.
if (left->ValueType == right->ValueType || (left->ValueType == TypeVector3 && right->ValueType == TypeVector2))
{
ValueType = left->ValueType;
return true;
}
else
{
ScriptPosition.Message(MSG_ERROR, "Incompatible operands for operator %c", Operator);
delete this;
return false;
}
break;
case '/':
if (right->IsVector())
{
@ -2592,16 +2572,55 @@ FxAddSub::FxAddSub(int o, FxExpression *l, FxExpression *r)
FxExpression *FxAddSub::Resolve(FCompileContext& ctx)
{
CHECKRESOLVED();
if (!ResolveLR(ctx, true))
return nullptr;
if (!IsNumeric() && !IsVector())
RESOLVE(left, ctx);
RESOLVE(right, ctx);
if (!left || !right)
{
ScriptPosition.Message(MSG_ERROR, "Numeric type expected");
delete this;
return nullptr;
return false;
}
else if (left->isConstant() && right->isConstant())
if (left->IsVector() && right->IsVector())
{
// a vector2 can be added to or subtracted from a vector 3 but it needs to be the right operand.
if (left->ValueType == right->ValueType || (left->ValueType == TypeVector3 && right->ValueType == TypeVector2))
{
ValueType = left->ValueType;
}
else
{
ScriptPosition.Message(MSG_ERROR, "Incompatible operands for %s", Operator == '+' ? "addition" : "subtraction");
delete this;
return nullptr;
}
}
else if (left->IsNumeric() && right->IsNumeric())
{
// Addition and subtraction of unsigned ints results in an unsigned int. (16 and 8 bit values never get here, they get promoted to regular ints elsewhere already.)
if (left->ValueType == TypeUInt32 && right->ValueType == TypeUInt32)
{
ValueType = TypeUInt32;
}
else if (left->ValueType->GetRegType() == REGT_INT && right->ValueType->GetRegType() == REGT_INT)
{
ValueType = TypeSInt32; // Addition and subtraction forces all integer-derived types to signed int.
}
else
{
ValueType = TypeFloat64;
Promote(ctx);
}
}
else
{
// To check: It may be that this could pass in DECORATE, although setting TypeVoid here would pretty much prevent that.
ScriptPosition.Message(MSG_ERROR, "Incompatible operands for %s", Operator == '+' ? "addition" : "subtraction");
delete this;
return false;
}
if (left->isConstant() && right->isConstant())
{
if (IsFloat())
{
@ -2631,7 +2650,6 @@ FxExpression *FxAddSub::Resolve(FCompileContext& ctx)
}
}
Promote(ctx);
return this;
}