video_core: Rewrite the texture cache

The current texture cache has several points that hurt maintainability
and performance. It's easy to break unrelated parts of the cache
when doing minor changes. The cache can easily forget valuable
information about the cached textures by CPU writes or simply by its
normal usage.The current texture cache has several points that hurt
maintainability and performance. It's easy to break unrelated parts
of the cache when doing minor changes. The cache can easily forget
valuable information about the cached textures by CPU writes or simply
by its normal usage.

This commit aims to address those issues.

1 files changed, 70 insertions, 0 deletions

diff --git a/src/video_core/texture_cache/accelerated_swizzle.cpp b/src/video_core/texture_cache/accelerated_swizzle.cpp
new file mode 100644
index 000000000..a4fc1184b
--- /dev/null
+++ b/src/video_core/texture_cache/accelerated_swizzle.cpp
@@ -0,0 +1,70 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <array>
+#include <bit>
+
+#include "common/alignment.h"
+#include "common/common_types.h"
+#include "common/div_ceil.h"
+#include "video_core/surface.h"
+#include "video_core/texture_cache/accelerated_swizzle.h"
+#include "video_core/texture_cache/util.h"
+#include "video_core/textures/decoders.h"
+
+namespace VideoCommon::Accelerated {
+
+using Tegra::Texture::GOB_SIZE_SHIFT;
+using Tegra::Texture::GOB_SIZE_X;
+using Tegra::Texture::GOB_SIZE_X_SHIFT;
+using Tegra::Texture::GOB_SIZE_Y_SHIFT;
+using VideoCore::Surface::BytesPerBlock;
+
+BlockLinearSwizzle2DParams MakeBlockLinearSwizzle2DParams(const SwizzleParameters& swizzle,
+                                                          const ImageInfo& info) {
+    const Extent3D block = swizzle.block;
+    const Extent3D num_tiles = swizzle.num_tiles;
+    const u32 bytes_per_block = BytesPerBlock(info.format);
+    const u32 stride_alignment = CalculateLevelStrideAlignment(info, swizzle.level);
+    const u32 stride = Common::AlignBits(num_tiles.width, stride_alignment) * bytes_per_block;
+    const u32 gobs_in_x = Common::DivCeilLog2(stride, GOB_SIZE_X_SHIFT);
+    return BlockLinearSwizzle2DParams{
+        .origin{0, 0, 0},
+        .destination{0, 0, 0},
+        .bytes_per_block_log2 = static_cast<u32>(std::countr_zero(bytes_per_block)),
+        .layer_stride = info.layer_stride,
+        .block_size = gobs_in_x << (GOB_SIZE_SHIFT + block.height + block.depth),
+        .x_shift = GOB_SIZE_SHIFT + block.height + block.depth,
+        .block_height = block.height,
+        .block_height_mask = (1U << block.height) - 1,
+    };
+}
+
+BlockLinearSwizzle3DParams MakeBlockLinearSwizzle3DParams(const SwizzleParameters& swizzle,
+                                                          const ImageInfo& info) {
+    const Extent3D block = swizzle.block;
+    const Extent3D num_tiles = swizzle.num_tiles;
+    const u32 bytes_per_block = BytesPerBlock(info.format);
+    const u32 stride_alignment = CalculateLevelStrideAlignment(info, swizzle.level);
+    const u32 stride = Common::AlignBits(num_tiles.width, stride_alignment) * bytes_per_block;
+
+    const u32 gobs_in_x = (stride + GOB_SIZE_X - 1) >> GOB_SIZE_X_SHIFT;
+    const u32 block_size = gobs_in_x << (GOB_SIZE_SHIFT + block.height + block.depth);
+    const u32 slice_size =
+        Common::DivCeilLog2(num_tiles.height, block.height + GOB_SIZE_Y_SHIFT) * block_size;
+    return BlockLinearSwizzle3DParams{
+        .origin{0, 0, 0},
+        .destination{0, 0, 0},
+        .bytes_per_block_log2 = static_cast<u32>(std::countr_zero(bytes_per_block)),
+        .slice_size = slice_size,
+        .block_size = block_size,
+        .x_shift = GOB_SIZE_SHIFT + block.height + block.depth,
+        .block_height = block.height,
+        .block_height_mask = (1U << block.height) - 1,
+        .block_depth = block.depth,
+        .block_depth_mask = (1U << block.depth) - 1,
+    };
+}
+
+} // namespace VideoCommon::Accelerated
\ No newline at end of file