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Merge pull request #1244 from FernandoS27/ipa 

shader_decompiler: Implemented IPA Properly (Stage 1)
This commit is contained in:
bunnei 2018-09-05 21:20:40 -04:00 committed by GitHub
parent 94f193af65 e63b229f4a
commit 6f09c5b128
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 98 additions and 47 deletions
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12
src/video_core/engines/shader_bytecode.h
View File

@ -76,6 +76,7 @@ union Attribute {
Position = 7,
Attribute_0 = 8,
Attribute_31 = 39,
PointCoord = 46,
// This attribute contains a tuple of (~, ~, InstanceId, VertexId) when inside a vertex
// shader, and a tuple of (TessCoord.x, TessCoord.y, TessCoord.z, ~) when inside a Tess Eval
// shader.
@ -246,6 +247,17 @@ enum class TextureType : u64 {
enum class IpaInterpMode : u64 { Linear = 0, Perspective = 1, Flat = 2, Sc = 3 };
enum class IpaSampleMode : u64 { Default = 0, Centroid = 1, Offset = 2 };
struct IpaMode {
IpaInterpMode interpolation_mode;
IpaSampleMode sampling_mode;
inline bool operator==(const IpaMode& a) {
return (a.interpolation_mode == interpolation_mode) && (a.sampling_mode == sampling_mode);
}
inline bool operator!=(const IpaMode& a) {
return !((*this) == a);
}
};
union Instruction {
Instruction& operator=(const Instruction& instr) {
value = instr.value;

131
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -247,6 +247,7 @@ public:
const Maxwell3D::Regs::ShaderStage& stage, const std::string& suffix)
: shader{shader}, declarations{declarations}, stage{stage}, suffix{suffix} {
BuildRegisterList();
BuildInputList();
}
/**
@ -343,9 +344,10 @@ public:
* @param elem The element to use for the operation.
* @param attribute The input attribute to use as the source value.
*/
void SetRegisterToInputAttibute(const Register& reg, u64 elem, Attribute::Index attribute) {
void SetRegisterToInputAttibute(const Register& reg, u64 elem, Attribute::Index attribute,
const Tegra::Shader::IpaMode& input_mode) {
std::string dest = GetRegisterAsFloat(reg);
std::string src = GetInputAttribute(attribute) + GetSwizzle(elem);
std::string src = GetInputAttribute(attribute, input_mode) + GetSwizzle(elem);
shader.AddLine(dest + " = " + src + ';');
}
@ -412,12 +414,13 @@ public:
}
declarations.AddNewLine();
for (const auto& index : declr_input_attribute) {
for (const auto element : declr_input_attribute) {
// TODO(bunnei): Use proper number of elements for these
declarations.AddLine("layout(location = " +
std::to_string(static_cast<u32>(index) -
static_cast<u32>(Attribute::Index::Attribute_0)) +
") in vec4 " + GetInputAttribute(index) + ';');
u32 idx =
static_cast<u32>(element.first) - static_cast<u32>(Attribute::Index::Attribute_0);
declarations.AddLine("layout(location = " + std::to_string(idx) + ")" +
GetInputFlags(element.first) + "in vec4 " +
GetInputAttribute(element.first, element.second) + ';');
}
declarations.AddNewLine();
@ -532,11 +535,24 @@ private:
}
}
void BuildInputList() {
const u32 size = static_cast<u32>(Attribute::Index::Attribute_31) -
static_cast<u32>(Attribute::Index::Attribute_0) + 1;
declr_input_attribute.reserve(size);
}
/// Generates code representing an input attribute register.
std::string GetInputAttribute(Attribute::Index attribute) {
std::string GetInputAttribute(Attribute::Index attribute,
const Tegra::Shader::IpaMode& input_mode) {
switch (attribute) {
case Attribute::Index::Position:
if (stage != Maxwell3D::Regs::ShaderStage::Fragment) {
return "position";
} else {
return "vec4(gl_FragCoord.x, gl_FragCoord.y, gl_FragCoord.z, 1.0)";
}
case Attribute::Index::PointCoord:
return "vec4(gl_PointCoord.x, gl_PointCoord.y, 0, 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
@ -552,7 +568,14 @@ private:
static_cast<u32>(Attribute::Index::Attribute_0)};
if (attribute >= Attribute::Index::Attribute_0 &&
attribute <= Attribute::Index::Attribute_31) {
declr_input_attribute.insert(attribute);
if (declr_input_attribute.count(attribute) == 0) {
declr_input_attribute[attribute] = input_mode;
} else {
if (declr_input_attribute[attribute] != input_mode) {
LOG_CRITICAL(HW_GPU, "Same Input multiple input modes");
UNREACHABLE();
}
}
return "input_attribute_" + std::to_string(index);
}
@ -563,6 +586,49 @@ private:
return "vec4(0, 0, 0, 0)";
}
std::string GetInputFlags(const Attribute::Index attribute) {
const Tegra::Shader::IpaSampleMode sample_mode =
declr_input_attribute[attribute].sampling_mode;
const Tegra::Shader::IpaInterpMode interp_mode =
declr_input_attribute[attribute].interpolation_mode;
std::string out;
switch (interp_mode) {
case Tegra::Shader::IpaInterpMode::Flat: {
out += "flat ";
break;
}
case Tegra::Shader::IpaInterpMode::Linear: {
out += "noperspective ";
break;
}
case Tegra::Shader::IpaInterpMode::Perspective: {
// Default, Smooth
break;
}
default: {
LOG_CRITICAL(HW_GPU, "Unhandled Ipa InterpMode: {}", static_cast<u32>(interp_mode));
UNREACHABLE();
}
}
switch (sample_mode) {
case Tegra::Shader::IpaSampleMode::Centroid: {
// Note not implemented, it can be implemented with the "centroid " keyword in glsl;
LOG_CRITICAL(HW_GPU, "Ipa Sampler Mode: centroid, not implemented");
UNREACHABLE();
break;
}
case Tegra::Shader::IpaSampleMode::Default: {
// Default, n/a
break;
}
default: {
LOG_CRITICAL(HW_GPU, "Unhandled Ipa SampleMode: {}", static_cast<u32>(sample_mode));
UNREACHABLE();
}
}
return out;
}
/// Generates code representing an output attribute register.
std::string GetOutputAttribute(Attribute::Index attribute) {
switch (attribute) {
@ -593,7 +659,7 @@ private:
ShaderWriter& shader;
ShaderWriter& declarations;
std::vector<GLSLRegister> regs;
std::set<Attribute::Index> declr_input_attribute;
std::unordered_map<Attribute::Index, Tegra::Shader::IpaMode> declr_input_attribute;
std::set<Attribute::Index> declr_output_attribute;
std::array<ConstBufferEntry, Maxwell3D::Regs::MaxConstBuffers> declr_const_buffers;
std::vector<SamplerEntry> used_samplers;
@ -1634,8 +1700,12 @@ private:
switch (opcode->GetId()) {
case OpCode::Id::LD_A: {
ASSERT_MSG(instr.attribute.fmt20.size == 0, "untested");
// Note: Shouldn't this be interp mode flat? As in no interpolation made.
Tegra::Shader::IpaMode input_mode{Tegra::Shader::IpaInterpMode::Perspective,
Tegra::Shader::IpaSampleMode::Default};
regs.SetRegisterToInputAttibute(instr.gpr0, instr.attribute.fmt20.element,
instr.attribute.fmt20.index);
instr.attribute.fmt20.index, input_mode);
break;
}
case OpCode::Id::LD_C: {
@ -2127,42 +2197,11 @@ private:
case OpCode::Id::IPA: {
const auto& attribute = instr.attribute.fmt28;
const auto& reg = instr.gpr0;
ASSERT_MSG(instr.ipa.sample_mode == Tegra::Shader::IpaSampleMode::Default,
"Unhandled IPA sample mode: {}",
static_cast<u32>(instr.ipa.sample_mode.Value()));
ASSERT_MSG(instr.ipa.saturate == 0, "IPA saturate not implemented");
switch (instr.ipa.interp_mode) {
case Tegra::Shader::IpaInterpMode::Linear:
if (stage == Maxwell3D::Regs::ShaderStage::Fragment &&
attribute.index == Attribute::Index::Position) {
switch (attribute.element) {
case 0:
shader.AddLine(regs.GetRegisterAsFloat(reg) + " = gl_FragCoord.x;");
break;
case 1:
shader.AddLine(regs.GetRegisterAsFloat(reg) + " = gl_FragCoord.y;");
break;
case 2:
shader.AddLine(regs.GetRegisterAsFloat(reg) + " = gl_FragCoord.z;");
break;
case 3:
shader.AddLine(regs.GetRegisterAsFloat(reg) + " = 1.0;");
break;
}
} else {
regs.SetRegisterToInputAttibute(reg, attribute.element, attribute.index);
}
break;
case Tegra::Shader::IpaInterpMode::Perspective:
regs.SetRegisterToInputAttibute(reg, attribute.element, attribute.index);
break;
default:
LOG_CRITICAL(HW_GPU, "Unhandled IPA mode: {}",
static_cast<u32>(instr.ipa.interp_mode.Value()));
UNREACHABLE();
regs.SetRegisterToInputAttibute(reg, attribute.element, attribute.index);
}
Tegra::Shader::IpaMode input_mode{instr.ipa.interp_mode.Value(),
instr.ipa.sample_mode.Value()};
regs.SetRegisterToInputAttibute(reg, attribute.element, attribute.index,
input_mode);
break;
}
case OpCode::Id::SSY: {