1 files changed, 67 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/predicate_set_predicate.cpp b/src/video_core/shader/decode/predicate_set_predicate.cpp
new file mode 100644
index 000000000..1717f0653
--- /dev/null
+++ b/src/video_core/shader/decode/predicate_set_predicate.cpp
@@ -0,0 +1,67 @@
+// Copyright 2018 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "common/assert.h"
+#include "common/common_types.h"
+#include "video_core/engines/shader_bytecode.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+using Tegra::Shader::Pred;
+
+u32 ShaderIR::DecodePredicateSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    switch (opcode->get().GetId()) {
+    case OpCode::Id::PSETP: {
+        const Node op_a = GetPredicate(instr.psetp.pred12, instr.psetp.neg_pred12 != 0);
+        const Node op_b = GetPredicate(instr.psetp.pred29, instr.psetp.neg_pred29 != 0);
+
+        // We can't use the constant predicate as destination.
+        ASSERT(instr.psetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
+
+        const Node second_pred = GetPredicate(instr.psetp.pred39, instr.psetp.neg_pred39 != 0);
+
+        const OperationCode combiner = GetPredicateCombiner(instr.psetp.op);
+        const Node predicate = Operation(combiner, op_a, op_b);
+
+        // Set the primary predicate to the result of Predicate OP SecondPredicate
+        SetPredicate(bb, instr.psetp.pred3, Operation(combiner, predicate, second_pred));
+
+        if (instr.psetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
+            // Set the secondary predicate to the result of !Predicate OP SecondPredicate, if
+            // enabled
+            SetPredicate(bb, instr.psetp.pred0,
+                         Operation(combiner, Operation(OperationCode::LogicalNegate, predicate),
+                                   second_pred));
+        }
+        break;
+    }
+    case OpCode::Id::CSETP: {
+        const Node pred = GetPredicate(instr.csetp.pred39, instr.csetp.neg_pred39 != 0);
+        const Node condition_code = GetConditionCode(instr.csetp.cc);
+
+        const OperationCode combiner = GetPredicateCombiner(instr.csetp.op);
+
+        if (instr.csetp.pred3 != static_cast<u64>(Pred::UnusedIndex)) {
+            SetPredicate(bb, instr.csetp.pred3, Operation(combiner, condition_code, pred));
+        }
+        if (instr.csetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
+            const Node neg_cc = Operation(OperationCode::LogicalNegate, condition_code);
+            SetPredicate(bb, instr.csetp.pred0, Operation(combiner, neg_cc, pred));
+        }
+        break;
+    }
+    default:
+        UNIMPLEMENTED_MSG("Unhandled predicate instruction: {}", opcode->get().GetName());
+    }
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
+\ No newline at end of file