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Shader_IR: Implement Fast BRX and allow multi-branches in the CFG.

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This commit is contained in:
Fernando Sahmkow
2019-09-23 22:55:25 -04:00
committed by FernandoS27
parent acd6441134
commit 8909f52166
7 changed files with 260 additions and 132 deletions
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34
src/video_core/shader/decode.cpp
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@ -198,24 +198,38 @@ void ShaderIR::InsertControlFlow(NodeBlock& bb, const ShaderBlock& block) {
}
return result;
};
if (block.branch.address < 0) {
if (block.branch.kills) {
Node n = Operation(OperationCode::Discard);
n = apply_conditions(block.branch.cond, n);
if (std::holds_alternative<SingleBranch>(*block.branch)) {
auto branch = std::get_if<SingleBranch>(block.branch.get());
if (branch->address < 0) {
if (branch->kill) {
Node n = Operation(OperationCode::Discard);
n = apply_conditions(branch->condition, n);
bb.push_back(n);
global_code.push_back(n);
return;
}
Node n = Operation(OperationCode::Exit);
n = apply_conditions(branch->condition, n);
bb.push_back(n);
global_code.push_back(n);
return;
}
Node n = Operation(OperationCode::Exit);
n = apply_conditions(block.branch.cond, n);
Node n = Operation(OperationCode::Branch, Immediate(branch->address));
n = apply_conditions(branch->condition, n);
bb.push_back(n);
global_code.push_back(n);
return;
}
Node n = Operation(OperationCode::Branch, Immediate(block.branch.address));
n = apply_conditions(block.branch.cond, n);
bb.push_back(n);
global_code.push_back(n);
auto multi_branch = std::get_if<MultiBranch>(block.branch.get());
Node op_a = GetRegister(multi_branch->gpr);
for (auto& branch_case : multi_branch->branches) {
Node n = Operation(OperationCode::Branch, Immediate(branch_case.address));
Node op_b = Immediate(branch_case.cmp_value);
Node condition = GetPredicateComparisonInteger(Tegra::Shader::PredCondition::Equal, false, op_a, op_b);
auto result = Conditional(condition, {n});
bb.push_back(result);
global_code.push_back(result);
}
}
u32 ShaderIR::DecodeInstr(NodeBlock& bb, u32 pc) {