1 files changed, 46 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/predicate_set_register.cpp b/src/video_core/shader/decode/predicate_set_register.cpp
new file mode 100644
index 000000000..8bd15fb00
--- /dev/null
+++ b/src/video_core/shader/decode/predicate_set_register.cpp
@@ -0,0 +1,46 @@
+// 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;
+
+u32 ShaderIR::DecodePredicateSetRegister(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    UNIMPLEMENTED_IF_MSG(instr.generates_cc,
+                         "Condition codes generation in PSET is not implemented");
+
+    const Node op_a = GetPredicate(instr.pset.pred12, instr.pset.neg_pred12 != 0);
+    const Node op_b = GetPredicate(instr.pset.pred29, instr.pset.neg_pred29 != 0);
+    const Node first_pred = Operation(GetPredicateCombiner(instr.pset.cond), op_a, op_b);
+
+    const Node second_pred = GetPredicate(instr.pset.pred39, instr.pset.neg_pred39 != 0);
+
+    const OperationCode combiner = GetPredicateCombiner(instr.pset.op);
+    const Node predicate = Operation(combiner, first_pred, second_pred);
+
+    const Node true_value = instr.pset.bf ? Immediate(1.0f) : Immediate(0xffffffff);
+    const Node false_value = instr.pset.bf ? Immediate(0.0f) : Immediate(0);
+    const Node value =
+        Operation(OperationCode::Select, PRECISE, predicate, true_value, false_value);
+
+    if (instr.pset.bf) {
+        SetInternalFlagsFromFloat(bb, value, instr.generates_cc);
+    } else {
+        SetInternalFlagsFromInteger(bb, value, instr.generates_cc);
+    }
+    SetRegister(bb, instr.gpr0, value);
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
+\ No newline at end of file