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shader: Fix control flow

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This commit is contained in:
ReinUsesLisp
2021-02-24 05:21:30 -03:00
committed by ameerj
parent 9d6a98d950
commit e87a502da2
8 changed files with 39 additions and 20 deletions
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27
src/shader_recompiler/frontend/ir/ir_emitter.cpp
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@@ -134,18 +134,27 @@ void IREmitter::SetOFlag(const U1& value) {
Inst(Opcode::SetOFlag, value);
}
U1 IREmitter::Condition(IR::Condition cond) {
if (cond == IR::Condition{true}) {
return Imm1(true);
} else if (cond == IR::Condition{false}) {
return Imm1(false);
static U1 GetFlowTest(IREmitter& ir, FlowTest flow_test) {
switch (flow_test) {
case FlowTest::T:
return ir.Imm1(true);
case FlowTest::F:
return ir.Imm1(false);
case FlowTest::EQ:
// TODO: Test this
return ir.GetZFlag();
case FlowTest::NE:
// TODO: Test this
return ir.LogicalNot(ir.GetZFlag());
default:
throw NotImplementedException("Flow test {}", flow_test);
}
}
U1 IREmitter::Condition(IR::Condition cond) {
const FlowTest flow_test{cond.FlowTest()};
const auto [pred, is_negated]{cond.Pred()};
if (flow_test == FlowTest::T) {
return GetPred(pred, is_negated);
}
throw NotImplementedException("Condition {}", cond);
return LogicalAnd(GetPred(pred, is_negated), GetFlowTest(*this, flow_test));
}
F32 IREmitter::GetAttribute(IR::Attribute attribute) {

2
src/shader_recompiler/frontend/ir/opcodes.inc
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@@ -4,8 +4,8 @@
// opcode name, return type, arg1 type, arg2 type, arg3 type, arg4 type, ...
OPCODE(Phi, Opaque, )
OPCODE(Void, Void, )
OPCODE(Identity, Opaque, Opaque, )
OPCODE(Void, Void, )
// Control flow
OPCODE(Branch, Void, Label, )

15
src/shader_recompiler/frontend/ir/structured_control_flow.cpp
View File

@@ -329,7 +329,6 @@ private:
if (!sibling) {
throw LogicError("Not siblings");
}
// goto_stmt and label_stmt are guaranteed to be siblings, eliminate
if (std::next(goto_stmt) == label_stmt) {
// Simply eliminate the goto if the label is next to it
@@ -351,9 +350,14 @@ private:
const std::unordered_map labels_map{BuildLabels(blocks)};
Tree& root{root_stmt.children};
auto insert_point{root.begin()};
// Skip all goto variables zero-initialization
std::advance(insert_point, labels_map.size());
for (Block* const block : blocks) {
++insert_point; // Skip label
++insert_point; // Skip set variable
// Skip label
++insert_point;
// Skip set variable
++insert_point;
root.insert(insert_point, *pool.Create(block, &root_stmt));
if (block->IsTerminationBlock()) {
@@ -391,6 +395,7 @@ private:
labels_map.emplace(block, root.insert(root.end(), *label));
Statement* const false_stmt{pool.Create(Identity{}, Condition{false})};
root.push_back(*pool.Create(SetVariable{}, label_id, false_stmt, &root_stmt));
root.push_front(*pool.Create(SetVariable{}, label_id, false_stmt, &root_stmt));
++label_id;
}
return labels_map;
@@ -457,10 +462,10 @@ private:
}
body.erase(goto_stmt);
// Update nested if condition
switch (label_nested_stmt->type) {
case StatementType::If:
label_nested_stmt->cond = pool.Create(Or{}, neg_var, label_nested_stmt->cond);
// Update nested if condition
label_nested_stmt->cond = pool.Create(Or{}, variable, label_nested_stmt->cond);
break;
case StatementType::Loop:
break;

6
src/shader_recompiler/frontend/ir/value.cpp
View File

@@ -36,6 +36,10 @@ bool Value::IsIdentity() const noexcept {
return type == Type::Opaque && inst->Opcode() == Opcode::Identity;
}
bool Value::IsPhi() const noexcept {
return type == Type::Opaque && inst->Opcode() == Opcode::Phi;
}
bool Value::IsEmpty() const noexcept {
return type == Type::Void;
}
@@ -52,7 +56,7 @@ bool Value::IsLabel() const noexcept {
}
IR::Type Value::Type() const noexcept {
if (IsIdentity()) {
if (IsIdentity() || IsPhi()) {
return inst->Arg(0).Type();
}
if (type == Type::Opaque) {

1
src/shader_recompiler/frontend/ir/value.h
View File

@@ -33,6 +33,7 @@ public:
explicit Value(f64 value) noexcept;
[[nodiscard]] bool IsIdentity() const noexcept;
[[nodiscard]] bool IsPhi() const noexcept;
[[nodiscard]] bool IsEmpty() const noexcept;
[[nodiscard]] bool IsImmediate() const noexcept;
[[nodiscard]] bool IsLabel() const noexcept;

2
src/shader_recompiler/frontend/maxwell/control_flow.cpp
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@@ -354,7 +354,7 @@ void CFG::AnalyzeCondInst(Block* block, FunctionId function_id, Location pc,
// Impersonate the visited block with a virtual block
*block = std::move(virtual_block);
// Set the end properties of the conditional instruction
conditional_block->end = pc;
conditional_block->end = pc + 1;
conditional_block->end_class = insn_end_class;
// Add a label to the instruction after the conditional instruction
Block* const endif_block{AddLabel(conditional_block, block->stack, pc + 1, function_id)};

2
src/shader_recompiler/frontend/maxwell/translate/impl/impl.h
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@@ -209,7 +209,7 @@ public:
void P2R_cbuf(u64 insn);
void P2R_imm(u64 insn);
void PBK();
void PCNT(u64 insn);
void PCNT();
void PEXIT(u64 insn);
void PIXLD(u64 insn);
void PLONGJMP(u64 insn);

4
src/shader_recompiler/frontend/maxwell/translate/impl/not_implemented.cpp
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@@ -637,8 +637,8 @@ void TranslatorVisitor::PBK() {
// PBK is a no-op
}
void TranslatorVisitor::PCNT(u64) {
ThrowNotImplemented(Opcode::PCNT);
void TranslatorVisitor::PCNT() {
// PCNT is a no-op
}
void TranslatorVisitor::PEXIT(u64) {