diff options
| author | gdkchan <gab.dark.100@gmail.com> | 2020-04-22 03:00:11 -0300 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-04-22 16:00:11 +1000 |
| commit | 6bfe4715f05be10c73a788abd8727293a7eca77e (patch) | |
| tree | 2cb319f53b0c4b846352a9836772c3eff4b1db1d /Ryujinx.Graphics.Gpu/Memory/CounterCache.cs | |
| parent | c46edfab858051e4b800b2705df2c019c1d975cd (diff) | |
Initial conditional rendering support (#1012)
* Initial conditional rendering support
* Properly reset state
* Support conditional modes and skeleton a counter cache for future host conditional rendering
* Address PR feedback
Diffstat (limited to 'Ryujinx.Graphics.Gpu/Memory/CounterCache.cs')
| -rw-r--r-- | Ryujinx.Graphics.Gpu/Memory/CounterCache.cs | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/Ryujinx.Graphics.Gpu/Memory/CounterCache.cs b/Ryujinx.Graphics.Gpu/Memory/CounterCache.cs new file mode 100644 index 00000000..3110cdcc --- /dev/null +++ b/Ryujinx.Graphics.Gpu/Memory/CounterCache.cs @@ -0,0 +1,140 @@ +using System.Collections.Generic; + +namespace Ryujinx.Graphics.Gpu.Memory +{ + /// <summary> + /// Represents the GPU counter cache. + /// </summary> + class CounterCache + { + private struct CounterEntry + { + public ulong Address { get; } + + public CounterEntry(ulong address) + { + Address = address; + } + } + + private readonly List<CounterEntry> _items; + + /// <summary> + /// Creates a new instance of the GPU counter cache. + /// </summary> + public CounterCache() + { + _items = new List<CounterEntry>(); + } + + /// <summary> + /// Adds a new counter to the counter cache, or updates a existing one. + /// </summary> + /// <param name="gpuVa">GPU virtual address where the counter will be written in memory</param> + public void AddOrUpdate(ulong gpuVa) + { + int index = BinarySearch(gpuVa); + + CounterEntry entry = new CounterEntry(gpuVa); + + if (index < 0) + { + _items.Insert(~index, entry); + } + else + { + _items[index] = entry; + } + } + + /// <summary> + /// Handles removal of counters written to a memory region being unmapped. + /// </summary> + /// <param name="sender">Sender object</param> + /// <param name="e">Event arguments</param> + public void MemoryUnmappedHandler(object sender, UnmapEventArgs e) => RemoveRange(e.Address, e.Size); + + private void RemoveRange(ulong gpuVa, ulong size) + { + int index = BinarySearch(gpuVa + size - 1); + + if (index < 0) + { + index = ~index; + } + + if (index >= _items.Count || !InRange(gpuVa, size, _items[index].Address)) + { + return; + } + + int count = 1; + + while (index > 0 && InRange(gpuVa, size, _items[index - 1].Address)) + { + index--; + count++; + } + + _items.RemoveRange(index, count); + } + + /// <summary> + /// Checks whenever an address falls inside a given range. + /// </summary> + /// <param name="startVa">Range start address</param> + /// <param name="size">Range size</param> + /// <param name="gpuVa">Address being checked</param> + /// <returns>True if the address falls inside the range, false otherwise</returns> + private static bool InRange(ulong startVa, ulong size, ulong gpuVa) + { + return gpuVa >= startVa && gpuVa < startVa + size; + } + + /// <summary> + /// Check if any counter value was written to the specified GPU virtual memory address. + /// </summary> + /// <param name="gpuVa">GPU virtual address</param> + /// <returns>True if any counter value was written on the specified address, false otherwise</returns> + public bool Contains(ulong gpuVa) + { + return BinarySearch(gpuVa) >= 0; + } + + /// <summary> + /// Performs binary search of an address on the list. + /// </summary> + /// <param name="address">Address to search</param> + /// <returns>Index of the item, or complement of the index of the nearest item with lower value</returns> + private int BinarySearch(ulong address) + { + int left = 0; + int right = _items.Count - 1; + + while (left <= right) + { + int range = right - left; + + int middle = left + (range >> 1); + + CounterEntry item = _items[middle]; + + if (item.Address == address) + { + return middle; + } + + if (address < item.Address) + { + right = middle - 1; + } + else + { + left = middle + 1; + } + } + + return ~left; + } + } +} |