/// <summary cref="IValueVisitor.Visit(ViewCast)"/>
public void Visit(ViewCast value)
{
var target = AllocateView(value);
var source = LoadView(value.Value);
// Declare view
Declare(target);
using (var statement = BeginStatement(target, target.PointerFieldIndex))
{
statement.AppendPointerCast(TypeGenerator[target.ElementType]);
statement.Append(source);
statement.AppendField(source.PointerFieldIndex);
}
var sourceElementSize = ABI.GetSizeOf(value.SourceElementType);
var targetElementSize = ABI.GetSizeOf(value.TargetElementType);
// var newLength = length * sourceElementSize / targetElementSize;
using (var statement = BeginStatement(target, target.LengthFieldIndex))
{
statement.OpenParen();
statement.Append(source);
statement.AppendField(source.LengthFieldIndex);
statement.AppendOperation(
CLInstructions.GetArithmeticOperation(
BinaryArithmeticKind.Mul,
false,
out bool _));
statement.AppendConstant(sourceElementSize);
statement.CloseParen();
statement.AppendOperation(
CLInstructions.GetArithmeticOperation(
BinaryArithmeticKind.Div,
false,
out bool _));
statement.AppendConstant(targetElementSize);
}
}
/// <summary cref="IValueVisitor.Visit(ViewCast)"/>
public void Visit(ViewCast value)
{
var source = LoadAs <ViewVariable>(value.Value);
var pointer = source.Pointer;
var length = source.Length;
var sourceElementSize = ABI.GetSizeOf(value.SourceElementType);
var targetElementSize = ABI.GetSizeOf(value.TargetElementType);
// var newLength = length * sourceElementSize / targetElementSize;
var newLength = AllocateType(BasicValueType.Int32) as PrimitiveVariable;
using (var statement = BeginStatement(newLength))
{
statement.OpenParen();
statement.Append(length);
statement.AppendOperation(
CLInstructions.GetArithmeticOperation(
BinaryArithmeticKind.Mul,
false,
out bool _));
statement.AppendConstant(sourceElementSize);
statement.CloseParen();
statement.AppendOperation(
CLInstructions.GetArithmeticOperation(
BinaryArithmeticKind.Div,
false,
out bool _));
statement.AppendConstant(targetElementSize);
}
var newView = new ViewVariable(
value.Type as ViewType,
pointer,
newLength);
Bind(value, newView);
}
/// <summary cref="IIntrinsicSpecializerConfiguration.TryGetSizeOf(TypeNode, out int)"/>
public bool TryGetSizeOf(TypeNode type, out int size)
{
size = ABI.GetSizeOf(type);
return(true);
}
