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-rw-r--r--src/video_core/shader/decode/warp.cpp55
1 files changed, 55 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/warp.cpp b/src/video_core/shader/decode/warp.cpp
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index 000000000..04ca74f46
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+++ b/src/video_core/shader/decode/warp.cpp
@@ -0,0 +1,55 @@
+// Copyright 2019 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/node_helper.h"
+#include "video_core/shader/shader_ir.h"
+
+namespace VideoCommon::Shader {
+
+using Tegra::Shader::Instruction;
+using Tegra::Shader::OpCode;
+using Tegra::Shader::Pred;
+using Tegra::Shader::VoteOperation;
+
+namespace {
+OperationCode GetOperationCode(VoteOperation vote_op) {
+ switch (vote_op) {
+ case VoteOperation::All:
+ return OperationCode::VoteAll;
+ case VoteOperation::Any:
+ return OperationCode::VoteAny;
+ case VoteOperation::Eq:
+ return OperationCode::VoteEqual;
+ default:
+ UNREACHABLE_MSG("Invalid vote operation={}", static_cast<u64>(vote_op));
+ return OperationCode::VoteAll;
+ }
+}
+} // Anonymous namespace
+
+u32 ShaderIR::DecodeWarp(NodeBlock& bb, u32 pc) {
+ const Instruction instr = {program_code[pc]};
+ const auto opcode = OpCode::Decode(instr);
+
+ switch (opcode->get().GetId()) {
+ case OpCode::Id::VOTE: {
+ const Node value = GetPredicate(instr.vote.value, instr.vote.negate_value != 0);
+ const Node active = Operation(OperationCode::BallotThread, value);
+ const Node vote = Operation(GetOperationCode(instr.vote.operation), value);
+ SetRegister(bb, instr.gpr0, active);
+ SetPredicate(bb, instr.vote.dest_pred, vote);
+ break;
+ }
+ default:
+ UNIMPLEMENTED_MSG("Unhandled warp instruction: {}", opcode->get().GetName());
+ break;
+ }
+
+ return pc;
+}
+
+} // namespace VideoCommon::Shader