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// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once
#include <algorithm>
#include <cstdlib>
#include <cstring>
#include <limits>
#include <optional>
#include "video_core/engines/maxwell_3d.h"
namespace Vulkan {
constexpr bool VertexRepackInputSupported(bool dynamic_input, bool experimental_static) {
return dynamic_input || experimental_static;
}
// Pipelines without dynamic vertex input repack when the device cannot fetch the 69-byte stride.
// EGLANTINE_EXPERIMENTAL_STATIC_VERTEX_REPACK=1 forces the repack on, =0 forces it off.
inline bool StaticVertexRepackSelected(const char* override_value, u32 stride_alignment) {
if (override_value && std::strcmp(override_value, "1") == 0) {
return true;
}
if (override_value && std::strcmp(override_value, "0") == 0) {
return false;
}
return stride_alignment > 1 && 69 % stride_alignment != 0;
}
inline bool StaticVertexRepackEnabled(u32 stride_alignment) {
return StaticVertexRepackSelected(std::getenv("EGLANTINE_EXPERIMENTAL_STATIC_VERTEX_REPACK"),
stride_alignment);
}
struct VertexRepackParameters {
u32 vertices;
u32 output_size;
u32 source_base;
u32 source_bias;
u32 source_range;
u32 dispatch_groups;
};
inline std::optional<VertexRepackParameters> MakeVertexRepackParameters(u32 offset, u32 size,
u64 alignment,
u64 max_storage_range,
u32 max_dispatch_groups,
u64 buffer_size) {
if (size == 0 || alignment == 0) {
return std::nullopt;
}
const u64 vertices = (u64{size} + 68) / 69;
const u64 output_size = vertices * 72;
const u64 base = u64{offset} / alignment * alignment;
const u64 bias = offset - base;
// The word-rounded range must not run past the end of the source buffer
const u64 available = buffer_size > base ? buffer_size - base : 0;
const u64 range = (std::min)((bias + size + 3) / 4 * 4, available);
const u64 groups = (vertices * 18 + 127) / 128;
if (range < bias + size || output_size > std::numeric_limits<u32>::max() ||
range > std::numeric_limits<u32>::max() || output_size > max_storage_range ||
range > max_storage_range || groups > max_dispatch_groups) {
return std::nullopt;
}
return VertexRepackParameters{static_cast<u32>(vertices), static_cast<u32>(output_size),
static_cast<u32>(base), static_cast<u32>(bias),
static_cast<u32>(range), static_cast<u32>(groups)};
}
inline bool VertexRepackEnabled() {
static const bool enabled = [] {
const char* value = std::getenv("EGLANTINE_TEST_VERTEX_REPACK");
return !value || std::strcmp(value, "0") != 0;
}();
return enabled;
}
inline u32 VertexRepackMask(const Tegra::Engines::Maxwell3D::Regs& regs) {
using Attribute = Tegra::Engines::Maxwell3D::Regs::VertexAttribute;
if (!VertexRepackEnabled()) {
return 0;
}
u32 candidates = 0;
u32 excluded = 0;
for (const auto& attribute : regs.vertex_attrib_format) {
const u32 binding = attribute.buffer;
if (attribute.constant || regs.vertex_streams[binding].stride != 69) {
continue;
}
if (attribute.size == Attribute::Size::Invalid) {
excluded |= 1U << binding;
continue;
}
const u32 offset = attribute.offset;
const u32 size = attribute.SizeInBytes();
if (offset == 65 && size == 4) {
candidates |= 1U << binding;
}
if (offset + size > 69 || (offset < 65 && offset + size > 65)) {
excluded |= 1U << binding;
}
}
return candidates & ~excluded;
}
inline u32 RepackedVertexOffset(u32 mask, u32 binding, u32 offset) {
return offset + ((mask & (1U << binding)) && offset >= 65 ? 3U : 0U);
}
inline u32 RepackedVertexStride(u32 mask, u32 binding, u32 stride) {
return mask & (1U << binding) ? 72U : stride;
}
} // namespace Vulkan
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