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-rw-r--r--src/video_core/shader/decode/register_set_predicate.cpp29
1 files changed, 28 insertions, 1 deletions
diff --git a/src/video_core/shader/decode/register_set_predicate.cpp b/src/video_core/shader/decode/register_set_predicate.cpp
index 29a348cf5..796039cd9 100644
--- a/src/video_core/shader/decode/register_set_predicate.cpp
+++ b/src/video_core/shader/decode/register_set_predicate.cpp
@@ -16,7 +16,34 @@ u32 ShaderIR::DecodeRegisterSetPredicate(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
- UNIMPLEMENTED();
+ UNIMPLEMENTED_IF(instr.r2p.mode != Tegra::Shader::R2pMode::Pr);
+
+ const Node apply_mask = [&]() {
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::R2P_IMM:
+ return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
+ default:
+ UNREACHABLE();
+ return Immediate(static_cast<u32>(instr.r2p.immediate_mask));
+ }
+ }();
+ const Node mask =
+ Operation(OperationCode::ULogicalShiftRight, NO_PRECISE, GetRegister(instr.gpr8),
+ Immediate(static_cast<u32>(instr.r2p.byte)));
+
+ constexpr u32 programmable_preds = 7;
+ for (u64 pred = 0; pred < programmable_preds; ++pred) {
+ const Node shift = Immediate(1u << static_cast<u32>(pred));
+
+ const Node apply_compare = Operation(OperationCode::UBitwiseAnd, NO_PRECISE, apply_mask, shift);
+ const Node condition = Operation(OperationCode::LogicalUEqual, apply_compare, Immediate(0));
+
+ const Node value_compare = Operation(OperationCode::UBitwiseAnd, NO_PRECISE, mask, shift);
+ const Node value = Operation(OperationCode::LogicalUEqual, value_compare, Immediate(0));
+
+ const Node code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value);
+ bb.push_back(Conditional(condition, {code}));
+ }
return pc;
}