From cf27b59493501787320764889a0375711c3f68e1 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Fri, 20 Dec 2019 17:41:27 -0300
Subject: shader/r2p: Refactor P2R to support P2R

---
 .../shader/decode/register_set_predicate.cpp       | 46 ++++++++++++++--------
 1 file changed, 30 insertions(+), 16 deletions(-)

(limited to 'src/video_core/shader/decode')

diff --git a/src/video_core/shader/decode/register_set_predicate.cpp b/src/video_core/shader/decode/register_set_predicate.cpp
index e6c9d287e..ff8245020 100644
--- a/src/video_core/shader/decode/register_set_predicate.cpp
+++ b/src/video_core/shader/decode/register_set_predicate.cpp
@@ -13,37 +13,51 @@ namespace VideoCommon::Shader {
 using Tegra::Shader::Instruction;
 using Tegra::Shader::OpCode;
 
+namespace {
+constexpr u64 NUM_PROGRAMMABLE_PREDICATES = 7;
+}
+
 u32 ShaderIR::DecodeRegisterSetPredicate(NodeBlock& bb, u32 pc) {
     const Instruction instr = {program_code[pc]};
     const auto opcode = OpCode::Decode(instr);
 
-    UNIMPLEMENTED_IF(instr.r2p.mode != Tegra::Shader::R2pMode::Pr);
+    UNIMPLEMENTED_IF(instr.p2r_r2p.mode != Tegra::Shader::R2pMode::Pr);
 
-    const Node apply_mask = [&]() {
+    const Node apply_mask = [&] {
         switch (opcode->get().GetId()) {
         case OpCode::Id::R2P_IMM:
-            return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
+        case OpCode::Id::P2R_IMM:
+            return Immediate(static_cast<u32>(instr.p2r_r2p.immediate_mask));
         default:
             UNREACHABLE();
-            return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
+            return Immediate(0);
         }
     }();
-    const Node mask = GetRegister(instr.gpr8);
-    const auto offset = static_cast<u32>(instr.r2p.byte) * 8;
 
-    constexpr u32 programmable_preds = 7;
-    for (u64 pred = 0; pred < programmable_preds; ++pred) {
-        const auto shift = static_cast<u32>(pred);
+    switch (opcode->get().GetId()) {
+    case OpCode::Id::R2P_IMM: {
+        const Node mask = GetRegister(instr.gpr8);
+        const auto offset = static_cast<u32>(instr.p2r_r2p.byte) * 8;
+
+        for (u64 pred = 0; pred < NUM_PROGRAMMABLE_PREDICATES; ++pred) {
+            const auto shift = static_cast<u32>(pred);
 
-        const Node apply_compare = BitfieldExtract(apply_mask, shift, 1);
-        const Node condition =
-            Operation(OperationCode::LogicalUNotEqual, apply_compare, Immediate(0));
+            const Node apply_compare = BitfieldExtract(apply_mask, shift, 1);
+            const Node condition =
+                Operation(OperationCode::LogicalUNotEqual, apply_compare, Immediate(0));
 
-        const Node value_compare = BitfieldExtract(mask, offset + shift, 1);
-        const Node value = Operation(OperationCode::LogicalUNotEqual, value_compare, Immediate(0));
+            const Node value_compare = BitfieldExtract(mask, offset + shift, 1);
+            const Node value =
+                Operation(OperationCode::LogicalUNotEqual, value_compare, Immediate(0));
 
-        const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
-        bb.push_back(Conditional(condition, {code}));
+            const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
+            bb.push_back(Conditional(condition, {code}));
+        }
+        break;
+    }
+    default:
+        UNIMPLEMENTED_MSG("Unhandled P2R/R2R instruction: {}", opcode->get().GetName());
+        break;
     }
 
     return pc;
-- 
cgit v1.2.3