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MaxwellDMA: Optimize micro copies.
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commit
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@ -90,7 +90,47 @@ void MaxwellDMA::HandleCopy() {
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ASSERT(regs.exec.enable_2d == 1);
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if (regs.exec.is_dst_linear && !regs.exec.is_src_linear) {
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ASSERT(regs.src_params.BlockDepth() == 0);
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// Optimized path for micro copies.
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if (regs.dst_pitch * regs.y_count < Texture::GetGOBSize() && regs.dst_pitch <= 64) {
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const u32 bytes_per_pixel = regs.dst_pitch / regs.x_count;
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const std::size_t src_size = Texture::GetGOBSize();
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const std::size_t dst_size = regs.dst_pitch * regs.y_count;
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u32 pos_x = regs.src_params.pos_x;
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u32 pos_y = regs.src_params.pos_y;
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const u64 offset =
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Texture::GetGOBOffset(regs.src_params.size_x, regs.src_params.size_y, pos_x, pos_y,
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regs.src_params.BlockDepth(), bytes_per_pixel);
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const u32 x_in_gob = 64 / bytes_per_pixel;
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pos_x = pos_x % x_in_gob;
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pos_y = pos_y % 8;
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if (read_buffer.size() < src_size) {
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read_buffer.resize(src_size);
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}
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if (write_buffer.size() < dst_size) {
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write_buffer.resize(dst_size);
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}
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if (Settings::IsGPULevelExtreme()) {
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memory_manager.ReadBlock(source + offset, read_buffer.data(), src_size);
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memory_manager.ReadBlock(dest, write_buffer.data(), dst_size);
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} else {
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memory_manager.ReadBlockUnsafe(source + offset, read_buffer.data(), src_size);
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memory_manager.ReadBlockUnsafe(dest, write_buffer.data(), dst_size);
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}
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Texture::UnswizzleSubrect(regs.x_count, regs.y_count, regs.dst_pitch,
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regs.src_params.size_x, bytes_per_pixel, read_buffer.data(),
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write_buffer.data(), regs.src_params.BlockHeight(), pos_x,
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pos_y);
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memory_manager.WriteBlock(dest, write_buffer.data(), dst_size);
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return;
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}
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// If the input is tiled and the output is linear, deswizzle the input and copy it over.
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const u32 bytes_per_pixel = regs.dst_pitch / regs.x_count;
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const std::size_t src_size = Texture::CalculateSize(
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@ -382,4 +382,18 @@ std::size_t CalculateSize(bool tiled, u32 bytes_per_pixel, u32 width, u32 height
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}
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}
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u64 GetGOBOffset(u32 width, u32 height, u32 dst_x, u32 dst_y, u32 block_height,
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u32 bytes_per_pixel) {
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auto div_ceil = [](const u32 x, const u32 y) { return ((x + y - 1) / y); };
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const u32 gobs_in_block = 1 << block_height;
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const u32 y_blocks = gob_size_y << block_height;
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const u32 x_per_gob = gob_size_x / bytes_per_pixel;
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const u32 x_blocks = div_ceil(width, x_per_gob);
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const u32 block_size = gob_size * gobs_in_block;
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const u32 stride = block_size * x_blocks;
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const u32 base = (dst_y / y_blocks) * stride + (dst_x / x_per_gob) * block_size;
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const u32 relative_y = dst_y % y_blocks;
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return base + (relative_y / gob_size_y) * gob_size;
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}
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} // namespace Tegra::Texture
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@ -59,4 +59,7 @@ void UnswizzleSubrect(u32 subrect_width, u32 subrect_height, u32 dest_pitch, u32
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void SwizzleKepler(u32 width, u32 height, u32 dst_x, u32 dst_y, u32 block_height,
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std::size_t copy_size, const u8* source_data, u8* swizzle_data);
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u64 GetGOBOffset(u32 width, u32 height, u32 dst_x, u32 dst_y, u32 block_height,
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u32 bytes_per_pixel);
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} // namespace Tegra::Texture
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