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Allow for implicit int conversion to larger type

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nub31
2025-09-08 22:09:25 +02:00
parent f332856dd7
commit 9c9578f526
4 changed files with 86 additions and 39 deletions
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55
src/compiler/NubLang/Generation/QBE/QBEGenerator.cs
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@@ -600,6 +600,8 @@ public class QBEGenerator
FuncCallNode funcCall => EmitFuncCall(funcCall),
InterfaceFuncCallNode interfaceFuncCall => EmitInterfaceFuncCall(interfaceFuncCall),
InterfaceInitializerNode interfaceInitializer => EmitInterfaceInitializer(interfaceInitializer),
ConvertIntNode convertInt => EmitConvertInt(convertInt),
ConvertFloatNode convertFloat => EmitConvertFloat(convertFloat),
ExternFuncIdentNode externFuncIdent => EmitExternFuncIdent(externFuncIdent),
LocalFuncIdentNode localFuncIdent => EmitLocalFuncIdent(localFuncIdent),
VariableIdentNode variableIdent => EmitVariableIdent(variableIdent),
@@ -1118,6 +1120,59 @@ public class QBEGenerator
return destination;
}
private string EmitConvertInt(ConvertIntNode convertInt)
{
var value = EmitExpression(convertInt.Value);
if (convertInt.ValueType == convertInt.TargetType || convertInt.ValueType.Width > convertInt.TargetType.Width)
{
return value;
}
var method = convertInt.ValueType.Signed switch
{
true => convertInt.ValueType.Width switch
{
8 => "extsb",
16 => "extsh",
32 => "extsw",
_ => throw new ArgumentOutOfRangeException()
},
false => convertInt.ValueType.Width switch
{
8 => "extub",
16 => "extuh",
32 => "extuw",
_ => throw new ArgumentOutOfRangeException()
}
};
var result = TmpName();
_writer.Indented($"{result} {QBEAssign(convertInt.TargetType)} {method} {value}");
return result;
}
private string EmitConvertFloat(ConvertFloatNode convertFloat)
{
var value = EmitExpression(convertFloat.Value);
if (convertFloat.ValueType == convertFloat.TargetType)
{
return value;
}
var method = convertFloat.ValueType.Width switch
{
32 => "exts",
64 => "truncd",
_ => throw new ArgumentOutOfRangeException()
};
var result = TmpName();
_writer.Indented($"{result} {QBEAssign(convertFloat.TargetType)} {method} {value}");
return result;
}
private string EmitFuncCall(FuncCallNode funcCall)
{
var funcPointer = EmitExpression(funcCall.Expression);