diff options
Diffstat (limited to 'src/video_core/shader/decode/register_set_predicate.cpp')
-rw-r--r-- | src/video_core/shader/decode/register_set_predicate.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/video_core/shader/decode/register_set_predicate.cpp b/src/video_core/shader/decode/register_set_predicate.cpp new file mode 100644 index 000000000..bdb4424a6 --- /dev/null +++ b/src/video_core/shader/decode/register_set_predicate.cpp @@ -0,0 +1,51 @@ +// 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; + +u32 ShaderIR::DecodeRegisterSetPredicate(BasicBlock& bb, const BasicBlock& code, u32 pc) { + const Instruction instr = {program_code[pc]}; + const auto opcode = OpCode::Decode(instr); + + 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 = 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); + + 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 code = Operation(OperationCode::LogicalAssign, GetPredicate(pred), value); + bb.push_back(Conditional(condition, {code})); + } + + return pc; +} + +} // namespace VideoCommon::Shader
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