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gl_shader_decompiler: Implement GLSL physical attributes

This commit is contained in:
ReinUsesLisp 2019-04-30 19:36:18 -03:00
parent 71aa9d0877
commit c6f9e651b2
2 changed files with 101 additions and 66 deletions
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165
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -165,6 +165,7 @@ public:
DeclareConstantBuffers();
DeclareGlobalMemory();
DeclareSamplers();
DeclarePhysicalAttributeReader();
code.AddLine("void execute_" + suffix + "() {");
++code.scope;
@ -330,8 +331,7 @@ private:
void DeclareInputAttributes() {
if (ir.HasPhysicalAttributes()) {
const u32 num_inputs{stage == ShaderStage::Vertex ? GetNumPhysicalAttributes()
: GetNumPhysicalVaryings()};
const u32 num_inputs{GetNumPhysicalInputAttributes()};
for (u32 i = 0; i < num_inputs; ++i) {
DeclareInputAttribute(ToGenericAttribute(i));
}
@ -374,7 +374,7 @@ private:
}
void DeclareOutputAttributes() {
if (ir.HasPhysicalAttributes()) {
if (ir.HasPhysicalAttributes() && stage != ShaderStage::Fragment) {
for (u32 i = 0; i < GetNumPhysicalVaryings(); ++i) {
DeclareOutputAttribute(ToGenericAttribute(i));
}
@ -461,6 +461,31 @@ private:
code.AddNewLine();
}
void DeclarePhysicalAttributeReader() {
if (!ir.HasPhysicalAttributes()) {
return;
}
code.AddLine("float readPhysicalAttribute(uint physical_address) {");
++code.scope;
code.AddLine("switch (physical_address) {");
// Just declare generic attributes for now.
const auto num_attributes{static_cast<u32>(GetNumPhysicalAttributes())};
for (u32 index = 0; index < num_attributes; ++index) {
for (u32 element = 0; element < 4; ++element) {
code.AddLine(fmt::format("case 0x{:x}: return {};", 0x80 + index * 16 + element * 4,
ReadAttribute(ToGenericAttribute(index), element)));
}
}
code.AddLine("default: return 0;");
code.AddLine('}');
--code.scope;
code.AddLine('}');
code.AddNewLine();
}
void VisitBlock(const NodeBlock& bb) {
for (const Node node : bb) {
if (const std::string expr = Visit(node); !expr.empty()) {
@ -515,69 +540,12 @@ private:
return value;
} else if (const auto abuf = std::get_if<AbufNode>(node)) {
const auto attribute = abuf->GetIndex();
const auto element = abuf->GetElement();
const auto GeometryPass = [&](const std::string& name) {
if (stage == ShaderStage::Geometry && abuf->GetBuffer()) {
// TODO(Rodrigo): Guard geometry inputs against out of bound reads. Some games
// set an 0x80000000 index for those and the shader fails to build. Find out why
// this happens and what's its intent.
return "gs_" + name + "[ftou(" + Visit(abuf->GetBuffer()) +
") % MAX_VERTEX_INPUT]";
}
return name;
};
switch (attribute) {
case Attribute::Index::Position:
if (stage != ShaderStage::Fragment) {
return GeometryPass("position") + GetSwizzle(element);
} else {
return element == 3 ? "1.0f" : "gl_FragCoord" + GetSwizzle(element);
}
case Attribute::Index::PointCoord:
switch (element) {
case 0:
return "gl_PointCoord.x";
case 1:
return "gl_PointCoord.y";
case 2:
case 3:
return "0";
}
UNREACHABLE();
return "0";
case Attribute::Index::TessCoordInstanceIDVertexID:
// TODO(Subv): Find out what the values are for the first two elements when inside a
// vertex shader, and what's the value of the fourth element when inside a Tess Eval
// shader.
ASSERT(stage == ShaderStage::Vertex);
switch (element) {
case 2:
// Config pack's first value is instance_id.
return "uintBitsToFloat(config_pack[0])";
case 3:
return "uintBitsToFloat(gl_VertexID)";
}
UNIMPLEMENTED_MSG("Unmanaged TessCoordInstanceIDVertexID element={}", element);
return "0";
case Attribute::Index::FrontFacing:
// TODO(Subv): Find out what the values are for the other elements.
ASSERT(stage == ShaderStage::Fragment);
switch (element) {
case 3:
return "itof(gl_FrontFacing ? -1 : 0)";
}
UNIMPLEMENTED_MSG("Unmanaged FrontFacing element={}", element);
return "0";
default:
if (IsGenericAttribute(attribute)) {
return GeometryPass(GetInputAttribute(attribute)) + GetSwizzle(element);
}
break;
UNIMPLEMENTED_IF_MSG(abuf->IsPhysicalBuffer() && stage == ShaderStage::Geometry,
"Physical attributes in geometry shaders are not implemented");
if (abuf->IsPhysicalBuffer()) {
return "readPhysicalAttribute(ftou(" + Visit(abuf->GetPhysicalAddress()) + "))";
}
UNIMPLEMENTED_MSG("Unhandled input attribute: {}", static_cast<u32>(attribute));
return ReadAttribute(abuf->GetIndex(), abuf->GetElement(), abuf->GetBuffer());
} else if (const auto cbuf = std::get_if<CbufNode>(node)) {
const Node offset = cbuf->GetOffset();
@ -629,6 +597,69 @@ private:
return {};
}
std::string ReadAttribute(Attribute::Index attribute, u32 element, Node buffer = {}) {
const auto GeometryPass = [&](std::string name) {
if (stage == ShaderStage::Geometry && buffer) {
// TODO(Rodrigo): Guard geometry inputs against out of bound reads. Some games
// set an 0x80000000 index for those and the shader fails to build. Find out why
// this happens and what's its intent.
return "gs_" + std::move(name) + "[ftou(" + Visit(buffer) + ") % MAX_VERTEX_INPUT]";
}
return name;
};
switch (attribute) {
case Attribute::Index::Position:
if (stage != ShaderStage::Fragment) {
return GeometryPass("position") + GetSwizzle(element);
} else {
return element == 3 ? "1.0f" : "gl_FragCoord" + GetSwizzle(element);
}
case Attribute::Index::PointCoord:
switch (element) {
case 0:
return "gl_PointCoord.x";
case 1:
return "gl_PointCoord.y";
case 2:
case 3:
return "0";
}
UNREACHABLE();
return "0";
case Attribute::Index::TessCoordInstanceIDVertexID:
// TODO(Subv): Find out what the values are for the first two elements when inside a
// vertex shader, and what's the value of the fourth element when inside a Tess Eval
// shader.
ASSERT(stage == ShaderStage::Vertex);
switch (element) {
case 2:
// Config pack's first value is instance_id.
return "uintBitsToFloat(config_pack[0])";
case 3:
return "uintBitsToFloat(gl_VertexID)";
}
UNIMPLEMENTED_MSG("Unmanaged TessCoordInstanceIDVertexID element={}", element);
return "0";
case Attribute::Index::FrontFacing:
// TODO(Subv): Find out what the values are for the other elements.
ASSERT(stage == ShaderStage::Fragment);
switch (element) {
case 3:
return "itof(gl_FrontFacing ? -1 : 0)";
}
UNIMPLEMENTED_MSG("Unmanaged FrontFacing element={}", element);
return "0";
default:
if (IsGenericAttribute(attribute)) {
return GeometryPass(GetInputAttribute(attribute)) + GetSwizzle(element);
}
break;
}
UNIMPLEMENTED_MSG("Unhandled input attribute: {}", static_cast<u32>(attribute));
return "0";
}
std::string ApplyPrecise(Operation operation, const std::string& value) {
if (!IsPrecise(operation)) {
return value;
@ -1677,6 +1708,10 @@ private:
return name + '_' + std::to_string(index) + '_' + suffix;
}
u32 GetNumPhysicalInputAttributes() const {
return stage == ShaderStage::Vertex ? GetNumPhysicalAttributes() : GetNumPhysicalVaryings();
}
u32 GetNumPhysicalAttributes() const {
return std::min<u32>(device.GetMaxVertexAttributes(), Maxwell::NumVertexAttributes);
}

2
src/video_core/shader/shader_ir.h
View File

@ -885,7 +885,7 @@ private:
std::set<Sampler> used_samplers;
std::array<bool, Tegra::Engines::Maxwell3D::Regs::NumClipDistances> used_clip_distances{};
std::map<GlobalMemoryBase, GlobalMemoryUsage> used_global_memory;
bool use_physical_attributes = true; // Shader uses AL2P
bool use_physical_attributes{}; // Shader uses AL2P or physical attribute read/writes
Tegra::Shader::Header header;
};