/// <summary>
/// Creates an address-space cast conversion.
/// </summary>
/// <param name="sourceRegister">The source register.</param>
/// <param name="targetRegister">The target register.</param>
/// <param name="sourceAddressSpace">The source address space.</param>
/// <param name="targetAddressSpace">The target address space.</param>
private void CreateAddressSpaceCast(
PrimitiveRegister sourceRegister,
HardwareRegister targetRegister,
MemoryAddressSpace sourceAddressSpace,
MemoryAddressSpace targetAddressSpace)
{
var toGeneric = targetAddressSpace == MemoryAddressSpace.Generic;
var addressSpaceOperation = PTXInstructions.GetAddressSpaceCast(toGeneric);
var addressSpaceOperationSuffix =
PTXInstructions.GetAddressSpaceCastSuffix(Backend);
using var command = BeginCommand(addressSpaceOperation);
command.AppendAddressSpace(
toGeneric ? sourceAddressSpace : targetAddressSpace);
command.AppendSuffix(addressSpaceOperationSuffix);
command.AppendArgument(targetRegister);
command.AppendArgument(sourceRegister);
}
/// <summary cref="IBackendCodeGenerator.GenerateCode(AddressSpaceCast)"/>
public void GenerateCode(AddressSpaceCast value)
{
var sourceType = value.SourceType as AddressSpaceType;
var targetAdressRegister = AllocatePlatformRegister(
value,
out RegisterDescription _);
Debug.Assert(value.IsPointerCast, "Invalid pointer access");
var address = LoadPrimitive(value.Value);
var toGeneric = value.TargetAddressSpace == MemoryAddressSpace.Generic;
var addressSpaceOperation = PTXInstructions.GetAddressSpaceCast(toGeneric);
var addressSpaceOperationSuffix =
PTXInstructions.GetAddressSpaceCastSuffix(Backend);
using var command = BeginCommand(addressSpaceOperation);
command.AppendAddressSpace(
toGeneric ? sourceType.AddressSpace : value.TargetAddressSpace);
command.AppendSuffix(addressSpaceOperationSuffix);
command.AppendArgument(targetAdressRegister);
command.AppendArgument(address);
}
/// <summary cref="IValueVisitor.Visit(AddressSpaceCast)"/>
public void Visit(AddressSpaceCast value)
{
var sourceType = value.SourceType as AddressSpaceType;
var targetAdressRegister = AllocatePlatformRegister(value, out RegisterDescription _);
PrimitiveRegister address;
if (value.IsPointerCast)
{
address = LoadPrimitive(value.Value);
}
else
{
var viewSource = LoadAs <ViewImplementationRegister>(value.Value);
address = viewSource.Pointer;
// Reuse the existing length register since we don't modify the result
var viewTarget = new ViewImplementationRegister(
value.Type as ViewType,
targetAdressRegister,
viewSource.Length);
Bind(value, viewTarget);
}
var toGeneric = value.TargetAddressSpace == MemoryAddressSpace.Generic;
var addressSpaceOperation = PTXInstructions.GetAddressSpaceCast(toGeneric);
var addressSpaceOperationSuffix = PTXInstructions.GetAddressSpaceCastSuffix(ABI);
using (var command = BeginCommand(addressSpaceOperation))
{
command.AppendAddressSpace(
toGeneric ? sourceType.AddressSpace : value.TargetAddressSpace);
command.AppendSuffix(addressSpaceOperationSuffix);
command.AppendArgument(targetAdressRegister);
command.AppendArgument(address);
}
}
