1 files changed, 56 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/float_set_predicate.cpp b/src/video_core/shader/decode/float_set_predicate.cpp
new file mode 100644
index 000000000..e88b04d18
--- /dev/null
+++ b/src/video_core/shader/decode/float_set_predicate.cpp
@@ -0,0 +1,56 @@
+// 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::DecodeFloatSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) {
+    const Instruction instr = {program_code[pc]};
+    const auto opcode = OpCode::Decode(instr);
+
+    const Node op_a = GetOperandAbsNegFloat(GetRegister(instr.gpr8), instr.fsetp.abs_a != 0,
+                                            instr.fsetp.neg_a != 0);
+    Node op_b = [&]() {
+        if (instr.is_b_imm) {
+            return GetImmediate19(instr);
+        } else if (instr.is_b_gpr) {
+            return GetRegister(instr.gpr20);
+        } else {
+            return GetConstBuffer(instr.cbuf34.index, instr.cbuf34.offset);
+        }
+    }();
+    op_b = GetOperandAbsNegFloat(op_b, instr.fsetp.abs_b, false);
+
+    // We can't use the constant predicate as destination.
+    ASSERT(instr.fsetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
+
+    const Node predicate = GetPredicateComparisonFloat(instr.fsetp.cond, op_a, op_b);
+    const Node second_pred = GetPredicate(instr.fsetp.pred39, instr.fsetp.neg_pred != 0);
+
+    const OperationCode combiner = GetPredicateCombiner(instr.fsetp.op);
+    const Node value = Operation(combiner, predicate, second_pred);
+
+    // Set the primary predicate to the result of Predicate OP SecondPredicate
+    SetPredicate(bb, instr.fsetp.pred3, value);
+
+    if (instr.fsetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
+        // Set the secondary predicate to the result of !Predicate OP SecondPredicate,
+        // if enabled
+        const Node negated_pred = Operation(OperationCode::LogicalNegate, predicate);
+        const Node second_value = Operation(combiner, negated_pred, second_pred);
+        SetPredicate(bb, instr.fsetp.pred0, second_value);
+    }
+
+    return pc;
+}
+
+} // namespace VideoCommon::Shader
+\ No newline at end of file