shadPS4/src/shader_recompiler/frontend/fetch_shader.h
TheTurtle 399a725343
shader_recompiler: Replace buffer pulling with attribute divisor for instance step rates (#3238)
* shader_recompiler: Replace buffer pulling with attribute divisor for instance step rates

* flatten_extended_userdata: Remove special step rate buffer handling

* Review comments

* spirv_emit_context: Name all instance rate attribs properly

* spirv: Merge ReadConstBuffer again

template function only has 1 user now

* attribute: Add missing attributes

* translate: Reimplement step rate instance id

* Resolve validation warnings

* shader_recompiler: Separate vertex inputs from LS stage, cleanup tess
2025-07-14 00:32:02 +03:00

60 lines
2.1 KiB
C++

// SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <vector>
#include "common/types.h"
#include "shader_recompiler/info.h"
namespace Shader::Gcn {
struct VertexAttribute {
enum InstanceIdType : u8 {
None = 0,
OverStepRate0 = 1,
OverStepRate1 = 2,
Plain = 3,
};
u8 semantic; ///< Semantic index of the attribute
u8 dest_vgpr; ///< Destination VGPR to load first component.
u8 num_elements; ///< Number of components to load
u8 sgpr_base; ///< SGPR that contains the pointer to the list of vertex V#
u8 dword_offset; ///< The dword offset of the V# that describes this attribute.
u8 instance_data; ///< Indicates that the buffer will be accessed in instance rate
[[nodiscard]] InstanceIdType GetStepRate() const {
return static_cast<InstanceIdType>(instance_data);
}
[[nodiscard]] constexpr AmdGpu::Buffer GetSharp(const Shader::Info& info) const noexcept {
return info.ReadUdReg<AmdGpu::Buffer>(sgpr_base, dword_offset);
}
bool operator==(const VertexAttribute& other) const {
return semantic == other.semantic && dest_vgpr == other.dest_vgpr &&
num_elements == other.num_elements && sgpr_base == other.sgpr_base &&
dword_offset == other.dword_offset && instance_data == other.instance_data;
}
};
struct FetchShaderData {
const u32* code;
u32 size = 0;
std::vector<VertexAttribute> attributes;
s8 vertex_offset_sgpr = -1; ///< SGPR of vertex offset from VADDR
s8 instance_offset_sgpr = -1; ///< SGPR of instance offset from VADDR
bool operator==(const FetchShaderData& other) const {
return attributes == other.attributes && vertex_offset_sgpr == other.vertex_offset_sgpr &&
instance_offset_sgpr == other.instance_offset_sgpr;
}
};
const u32* GetFetchShaderCode(const Info& info, u32 sgpr_base);
std::optional<FetchShaderData> ParseFetchShader(const Shader::Info& info);
} // namespace Shader::Gcn