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Add a GetSpan method to the memory manager and use it on GPU (#877)

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gdkchan 2020-01-12 20:27:50 -03:00 • committed by jduncanator
parent 8b90924c1e
commit b8e3909d80
20 changed files with 93 additions and 48 deletions
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45
ARMeilleure/Memory/MemoryManager.cs
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@ -1,6 +1,7 @@
using ARMeilleure.State;
using System;
using System.Collections.Generic;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Threading;
@ -552,6 +553,50 @@ namespace ARMeilleure.Memory
return data;
}
public ReadOnlySpan<byte> GetSpan(ulong address, ulong size)
{
if (IsContiguous(address, size))
{
return new ReadOnlySpan<byte>((void*)Translate((long)address), (int)size);
}
else
{
return ReadBytes((long)address, (long)size);
}
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
private bool IsContiguous(ulong address, ulong size)
{
if (!IsValidPosition((long)address))
{
return false;
}
ulong endVa = (address + size + PageMask) & ~(ulong)PageMask;
address &= ~(ulong)PageMask;
int pages = (int)((endVa - address) / PageSize);
for (int page = 0; page < pages - 1; page++)
{
if (!IsValidPosition((long)address + PageSize))
{
return false;
}
if (GetPtEntry((long)address) + PageSize != GetPtEntry((long)address + PageSize))
{
return false;
}
address += PageSize;
}
return true;
}
public void WriteSByte(long position, sbyte value)
{
WriteByte(position, (byte)value);