From 3f1136ac6f39e3d0e0f2c250905a79c9b47aa28c Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Sun, 23 Dec 2018 17:14:43 -0300
Subject: [PATCH] shader_decode: Implement CSETP

---
 .../shader/decode/predicate_set_predicate.cpp | 51 ++++++++++++++-----
 1 file changed, 37 insertions(+), 14 deletions(-)

diff --git a/src/video_core/shader/decode/predicate_set_predicate.cpp b/src/video_core/shader/decode/predicate_set_predicate.cpp
index 24352170dc..6ea6dacebe 100644
--- a/src/video_core/shader/decode/predicate_set_predicate.cpp
+++ b/src/video_core/shader/decode/predicate_set_predicate.cpp
@@ -17,25 +17,48 @@ u32 ShaderIR::DecodePredicateSetPredicate(BasicBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 
-    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);
+    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));
+        // 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 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);
+        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));
+        // 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));
+        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;