82 lines
2.3 KiB
C++
82 lines
2.3 KiB
C++
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// Copyright 2020 yuzu Emulator Project
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#pragma once
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#include <algorithm>
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#include <vector>
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#include "common/common_types.h"
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#include "common/div_ceil.h"
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#include "video_core/memory_manager.h"
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#include "video_core/rasterizer_interface.h"
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namespace VideoCommon {
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template <typename Descriptor>
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class DescriptorTable {
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public:
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explicit DescriptorTable(Tegra::MemoryManager& gpu_memory_) : gpu_memory{gpu_memory_} {}
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[[nodiscard]] bool Synchornize(GPUVAddr gpu_addr, u32 limit) {
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[[likely]] if (current_gpu_addr == gpu_addr && current_limit == limit) {
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return false;
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}
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Refresh(gpu_addr, limit);
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return true;
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}
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void Invalidate() noexcept {
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std::ranges::fill(read_descriptors, 0);
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}
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[[nodiscard]] std::pair<Descriptor, bool> Read(u32 index) {
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DEBUG_ASSERT(index <= current_limit);
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const GPUVAddr gpu_addr = current_gpu_addr + index * sizeof(Descriptor);
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std::pair<Descriptor, bool> result;
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gpu_memory.ReadBlockUnsafe(gpu_addr, &result.first, sizeof(Descriptor));
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if (IsDescriptorRead(index)) {
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result.second = result.first != descriptors[index];
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} else {
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MarkDescriptorAsRead(index);
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result.second = true;
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}
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if (result.second) {
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descriptors[index] = result.first;
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}
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return result;
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}
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[[nodiscard]] u32 Limit() const noexcept {
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return current_limit;
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}
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private:
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void Refresh(GPUVAddr gpu_addr, u32 limit) {
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current_gpu_addr = gpu_addr;
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current_limit = limit;
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const size_t num_descriptors = static_cast<size_t>(limit) + 1;
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read_descriptors.clear();
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read_descriptors.resize(Common::DivCeil(num_descriptors, 64U), 0);
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descriptors.resize(num_descriptors);
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}
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void MarkDescriptorAsRead(u32 index) noexcept {
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read_descriptors[index / 64] |= 1ULL << (index % 64);
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}
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[[nodiscard]] bool IsDescriptorRead(u32 index) const noexcept {
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return (read_descriptors[index / 64] & (1ULL << (index % 64))) != 0;
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}
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Tegra::MemoryManager& gpu_memory;
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GPUVAddr current_gpu_addr{};
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u32 current_limit{};
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std::vector<u64> read_descriptors;
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std::vector<Descriptor> descriptors;
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};
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} // namespace VideoCommon
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