shader: Implement S2R Tid{XYZ} and CtaId{XYZ}

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -1513,6 +1513,16 @@ private:
         return "uintBitsToFloat(config_pack[2])";
     }
 
+    template <u32 element>
+    std::string LocalInvocationId(Operation) {
+        return "utof(gl_LocalInvocationID"s + GetSwizzle(element) + ')';
+    }
+
+    template <u32 element>
+    std::string WorkGroupId(Operation) {
+        return "utof(gl_WorkGroupID"s + GetSwizzle(element) + ')';
+    }
+
     static constexpr OperationDecompilersArray operation_decompilers = {
         &GLSLDecompiler::Assign,
 
@@ -1652,6 +1662,12 @@ private:
         &GLSLDecompiler::EndPrimitive,
 
         &GLSLDecompiler::YNegate,
+        &GLSLDecompiler::LocalInvocationId<0>,
+        &GLSLDecompiler::LocalInvocationId<1>,
+        &GLSLDecompiler::LocalInvocationId<2>,
+        &GLSLDecompiler::WorkGroupId<0>,
+        &GLSLDecompiler::WorkGroupId<1>,
+        &GLSLDecompiler::WorkGroupId<2>,
     };
 
     std::string GetRegister(u32 index) const {

src/video_core/renderer_vulkan/vk_shader_decompiler.cpp

@@ -1035,6 +1035,18 @@ private:
         return {};
     }
 
+    template <u32 element>
+    Id LocalInvocationId(Operation) {
+        UNIMPLEMENTED();
+        return {};
+    }
+
+    template <u32 element>
+    Id WorkGroupId(Operation) {
+        UNIMPLEMENTED();
+        return {};
+    }
+
     Id DeclareBuiltIn(spv::BuiltIn builtin, spv::StorageClass storage, Id type,
                       const std::string& name) {
         const Id id = OpVariable(type, storage);
@@ -1291,6 +1303,12 @@ private:
         &SPIRVDecompiler::EndPrimitive,
 
         &SPIRVDecompiler::YNegate,
+        &SPIRVDecompiler::LocalInvocationId<0>,
+        &SPIRVDecompiler::LocalInvocationId<1>,
+        &SPIRVDecompiler::LocalInvocationId<2>,
+        &SPIRVDecompiler::WorkGroupId<0>,
+        &SPIRVDecompiler::WorkGroupId<1>,
+        &SPIRVDecompiler::WorkGroupId<2>,
     };
 
     const ShaderIR& ir;

src/video_core/shader/decode/other.cpp

@@ -13,6 +13,7 @@ using Tegra::Shader::ConditionCode;
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 using Tegra::Shader::Register;
+using Tegra::Shader::SystemVariable;
 
 u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
@@ -58,20 +59,33 @@ u32 ShaderIR::DecodeOther(NodeBlock& bb, u32 pc) {
         break;
     }
     case OpCode::Id::MOV_SYS: {
+        const Node value = [&]() {
             switch (instr.sys20) {
-        case Tegra::Shader::SystemVariable::InvocationInfo: {
+            case SystemVariable::Ydirection:
+                return Operation(OperationCode::YNegate);
+            case SystemVariable::InvocationInfo:
                 LOG_WARNING(HW_GPU, "MOV_SYS instruction with InvocationInfo is incomplete");
-            SetRegister(bb, instr.gpr0, Immediate(0u));
+                return Immediate(0u);
-            break;
+            case SystemVariable::TidX:
-        }
+                return Operation(OperationCode::LocalInvocationIdX);
-        case Tegra::Shader::SystemVariable::Ydirection: {
+            case SystemVariable::TidY:
-            // Config pack's third value is Y_NEGATE's state.
+                return Operation(OperationCode::LocalInvocationIdY);
-            SetRegister(bb, instr.gpr0, Operation(OperationCode::YNegate));
+            case SystemVariable::TidZ:
-            break;
+                return Operation(OperationCode::LocalInvocationIdZ);
-        }
+            case SystemVariable::CtaIdX:
+                return Operation(OperationCode::WorkGroupIdX);
+            case SystemVariable::CtaIdY:
+                return Operation(OperationCode::WorkGroupIdY);
+            case SystemVariable::CtaIdZ:
+                return Operation(OperationCode::WorkGroupIdZ);
             default:
-            UNIMPLEMENTED_MSG("Unhandled system move: {}", static_cast<u32>(instr.sys20.Value()));
+                UNIMPLEMENTED_MSG("Unhandled system move: {}",
+                                  static_cast<u32>(instr.sys20.Value()));
+                return Immediate(0u);
             }
+        }();
+        SetRegister(bb, instr.gpr0, value);
+
         break;
     }
     case OpCode::Id::BRA: {

src/video_core/shader/shader_ir.h

@@ -182,6 +182,12 @@ enum class OperationCode {
     EndPrimitive, /// () -> void
 
     YNegate,            /// () -> float
+    LocalInvocationIdX, /// () -> uint
+    LocalInvocationIdY, /// () -> uint
+    LocalInvocationIdZ, /// () -> uint
+    WorkGroupIdX,       /// () -> uint
+    WorkGroupIdY,       /// () -> uint
+    WorkGroupIdZ,       /// () -> uint
 
     Amount,
 };