diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index 4b35396f9..8b413ae9a 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -391,6 +391,7 @@ public:
DeclareVertex();
DeclareGeometry();
DeclareRegisters();
+ DeclareCustomVariables();
DeclarePredicates();
DeclareLocalMemory();
DeclareInternalFlags();
@@ -503,6 +504,16 @@ private:
}
}
+ void DeclareCustomVariables() {
+ const u32 cv_num = ir.GetCustomVariablesAmount();
+ for (u32 i = 0; i < cv_num; ++i) {
+ code.AddLine("float {} = 0.0f;", GetCustomVariable(i));
+ }
+ if (cv_num > 0) {
+ code.AddNewLine();
+ }
+ }
+
void DeclarePredicates() {
const auto& predicates = ir.GetPredicates();
for (const auto pred : predicates) {
@@ -780,6 +791,11 @@ private:
return {GetRegister(index), Type::Float};
}
+ if (const auto cv = std::get_if<CustomVarNode>(&*node)) {
+ const u32 index = cv->GetIndex();
+ return {GetCustomVariable(index), Type::Float};
+ }
+
if (const auto immediate = std::get_if<ImmediateNode>(&*node)) {
const u32 value = immediate->GetValue();
if (value < 10) {
@@ -2250,6 +2266,10 @@ private:
return GetDeclarationWithSuffix(index, "gpr");
}
+ std::string GetCustomVariable(u32 index) const {
+ return GetDeclarationWithSuffix(index, "custom_var");
+ }
+
std::string GetPredicate(Tegra::Shader::Pred pred) const {
return GetDeclarationWithSuffix(static_cast<u32>(pred), "pred");
}
diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
index dd6d2ef03..bf797dad3 100644
--- a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
+++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp
@@ -353,6 +353,7 @@ private:
DeclareFragment();
DeclareCompute();
DeclareRegisters();
+ DeclareCustomVariables();
DeclarePredicates();
DeclareLocalMemory();
DeclareSharedMemory();
@@ -587,6 +588,15 @@ private:
}
}
+ void DeclareCustomVariables() {
+ const u32 cv_num = ir.GetCustomVariablesAmount();
+ for (u32 i = 0; i < cv_num; ++i) {
+ const Id id = OpVariable(t_prv_float, spv::StorageClass::Private, v_float_zero);
+ Name(id, fmt::format("custom_var_{}", i));
+ custom_variables.emplace(i, AddGlobalVariable(id));
+ }
+ }
+
void DeclarePredicates() {
for (const auto pred : ir.GetPredicates()) {
const Id id = OpVariable(t_prv_bool, spv::StorageClass::Private, v_false);
@@ -974,6 +984,11 @@ private:
return {OpLoad(t_float, registers.at(index)), Type::Float};
}
+ if (const auto cv = std::get_if<CustomVarNode>(&*node)) {
+ const u32 index = cv->GetIndex();
+ return {OpLoad(t_float, custom_variables.at(index)), Type::Float};
+ }
+
if (const auto immediate = std::get_if<ImmediateNode>(&*node)) {
return {Constant(t_uint, immediate->GetValue()), Type::Uint};
}
@@ -2505,6 +2520,7 @@ private:
Id out_vertex{};
Id in_vertex{};
std::map<u32, Id> registers;
+ std::map<u32, Id> custom_variables;
std::map<Tegra::Shader::Pred, Id> predicates;
std::map<u32, Id> flow_variables;
Id local_memory{};
diff --git a/src/video_core/shader/node.h b/src/video_core/shader/node.h
index 2f29b9506..db06767f6 100644
--- a/src/video_core/shader/node.h
+++ b/src/video_core/shader/node.h
@@ -212,6 +212,7 @@ enum class MetaStackClass {
class OperationNode;
class ConditionalNode;
class GprNode;
+class CustomVarNode;
class ImmediateNode;
class InternalFlagNode;
class PredicateNode;
@@ -223,7 +224,7 @@ class SmemNode;
class GmemNode;
class CommentNode;
-using NodeData = std::variant<OperationNode, ConditionalNode, GprNode, ImmediateNode,
+using NodeData = std::variant<OperationNode, ConditionalNode, GprNode, CustomVarNode, ImmediateNode,
InternalFlagNode, PredicateNode, AbufNode, PatchNode, CbufNode,
LmemNode, SmemNode, GmemNode, CommentNode>;
using Node = std::shared_ptr<NodeData>;
@@ -550,6 +551,20 @@ private:
Tegra::Shader::Register index{};
};
+/// A custom variable
+class CustomVarNode final {
+public:
+ explicit constexpr CustomVarNode(u32 index) : index{index} {}
+
+ u32 GetIndex() const {
+ return index;
+ }
+
+private:
+ u32 index{};
+};
+
+
/// A 32-bits value that represents an immediate value
class ImmediateNode final {
public:
diff --git a/src/video_core/shader/shader_ir.cpp b/src/video_core/shader/shader_ir.cpp
index a186e22b2..94972d57f 100644
--- a/src/video_core/shader/shader_ir.cpp
+++ b/src/video_core/shader/shader_ir.cpp
@@ -39,6 +39,10 @@ Node ShaderIR::GetRegister(Register reg) {
return MakeNode<GprNode>(reg);
}
+Node ShaderIR::GetCustomVariable(u32 id) {
+ return MakeNode<CustomVarNode>(id);
+}
+
Node ShaderIR::GetImmediate19(Instruction instr) {
return Immediate(instr.alu.GetImm20_19());
}
@@ -453,4 +457,9 @@ std::size_t ShaderIR::DeclareAmend(Node new_amend) {
return id;
}
+u32 ShaderIR::NewCustomVariable() {
+ const u32 id = num_custom_variables++;
+ return id;
+}
+
} // namespace VideoCommon::Shader
diff --git a/src/video_core/shader/shader_ir.h b/src/video_core/shader/shader_ir.h
index 121528346..2fe14e815 100644
--- a/src/video_core/shader/shader_ir.h
+++ b/src/video_core/shader/shader_ir.h
@@ -180,6 +180,10 @@ public:
return amend_code[index];
}
+ u32 GetCustomVariablesAmount() const {
+ return num_custom_variables;
+ }
+
private:
friend class ASTDecoder;
@@ -236,6 +240,8 @@ private:
/// Generates a node for a passed register.
Node GetRegister(Tegra::Shader::Register reg);
+ /// Generates a node for a custom variable
+ Node GetCustomVariable(u32 id);
/// Generates a node representing a 19-bit immediate value
Node GetImmediate19(Tegra::Shader::Instruction instr);
/// Generates a node representing a 32-bit immediate value
@@ -403,6 +409,8 @@ private:
/// Register new amending code and obtain the reference id.
std::size_t DeclareAmend(Node new_amend);
+ u32 NewCustomVariable();
+
const ProgramCode& program_code;
const u32 main_offset;
const CompilerSettings settings;
@@ -418,6 +426,7 @@ private:
NodeBlock global_code;
ASTManager program_manager{true, true};
std::vector<Node> amend_code;
+ u32 num_custom_variables{};
std::set<u32> used_registers;
std::set<Tegra::Shader::Pred> used_predicates;