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Merge pull request #1279 from FernandoS27/csetp

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shader_decompiler: Implemented (Partialy) Control Codes and CSETP
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bunnei 2018-09-18 22:10:48 -04:00 • committed by GitHub
commit 0284cbe7ec
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 133 additions and 21 deletions
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107
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
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@ -236,6 +236,14 @@ private:
const std::string& suffix;
};
enum class InternalFlag : u64 {
ZeroFlag = 0,
CarryFlag = 1,
OverflowFlag = 2,
NaNFlag = 3,
Amount
};
/**
* Used to manage shader registers that are emulated with GLSL. This class keeps track of the state
* of all registers (e.g. whether they are currently being used as Floats or Integers), and
@ -329,13 +337,19 @@ public:
void SetRegisterToInteger(const Register& reg, bool is_signed, u64 elem,
const std::string& value, u64 dest_num_components,
u64 value_num_components, bool is_saturated = false,
u64 dest_elem = 0, Register::Size size = Register::Size::Word) {
u64 dest_elem = 0, Register::Size size = Register::Size::Word,
bool sets_cc = false) {
ASSERT_MSG(!is_saturated, "Unimplemented");
const std::string func{is_signed ? "intBitsToFloat" : "uintBitsToFloat"};
SetRegister(reg, elem, func + '(' + ConvertIntegerSize(value, size) + ')',
dest_num_components, value_num_components, dest_elem);
if (sets_cc) {
const std::string zero_condition = "( " + ConvertIntegerSize(value, size) + " == 0 )";
SetInternalFlag(InternalFlag::ZeroFlag, zero_condition);
}
}
/**
@ -352,6 +366,26 @@ public:
shader.AddLine(dest + " = " + src + ';');
}
std::string GetControlCode(const Tegra::Shader::ControlCode cc) const {
switch (cc) {
case Tegra::Shader::ControlCode::NEU:
return "!(" + GetInternalFlag(InternalFlag::ZeroFlag) + ')';
default:
LOG_CRITICAL(HW_GPU, "Unimplemented Control Code {}", static_cast<u32>(cc));
UNREACHABLE();
return "false";
}
}
std::string GetInternalFlag(const InternalFlag ii) const {
const u32 code = static_cast<u32>(ii);
return "internalFlag_" + std::to_string(code) + suffix;
}
void SetInternalFlag(const InternalFlag ii, const std::string& value) const {
shader.AddLine(GetInternalFlag(ii) + " = " + value + ';');
}
/**
* Writes code that does a output attribute assignment to register operation. Output attributes
* are stored as floats, so this may require conversion.
@ -415,6 +449,12 @@ public:
}
declarations.AddNewLine();
for (u32 ii = 0; ii < static_cast<u64>(InternalFlag::Amount); ii++) {
const InternalFlag code = static_cast<InternalFlag>(ii);
declarations.AddLine("bool " + GetInternalFlag(code) + " = false;");
}
declarations.AddNewLine();
for (const auto element : declr_input_attribute) {
// TODO(bunnei): Use proper number of elements for these
u32 idx =
@ -1620,7 +1660,8 @@ private:
}
regs.SetRegisterToInteger(instr.gpr0, instr.conversion.is_output_signed, 0, op_a, 1,
1, instr.alu.saturate_d, 0, instr.conversion.dest_size);
1, instr.alu.saturate_d, 0, instr.conversion.dest_size,
instr.generates_cc.Value() != 0);
break;
}
case OpCode::Id::I2F_R:
@ -2277,31 +2318,55 @@ private:
break;
}
case OpCode::Type::PredicateSetPredicate: {
const std::string op_a =
GetPredicateCondition(instr.psetp.pred12, instr.psetp.neg_pred12 != 0);
const std::string op_b =
GetPredicateCondition(instr.psetp.pred29, instr.psetp.neg_pred29 != 0);
switch (opcode->GetId()) {
case OpCode::Id::PSETP: {
const std::string op_a =
GetPredicateCondition(instr.psetp.pred12, instr.psetp.neg_pred12 != 0);
const std::string op_b =
GetPredicateCondition(instr.psetp.pred29, instr.psetp.neg_pred29 != 0);
// We can't use the constant predicate as destination.
ASSERT(instr.psetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
// We can't use the constant predicate as destination.
ASSERT(instr.psetp.pred3 != static_cast<u64>(Pred::UnusedIndex));
const std::string second_pred =
GetPredicateCondition(instr.psetp.pred39, instr.psetp.neg_pred39 != 0);
const std::string second_pred =
GetPredicateCondition(instr.psetp.pred39, instr.psetp.neg_pred39 != 0);
const std::string combiner = GetPredicateCombiner(instr.psetp.op);
const std::string combiner = GetPredicateCombiner(instr.psetp.op);
const std::string predicate =
'(' + op_a + ") " + GetPredicateCombiner(instr.psetp.cond) + " (" + op_b + ')';
const std::string predicate =
'(' + op_a + ") " + GetPredicateCombiner(instr.psetp.cond) + " (" + op_b + ')';
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(instr.psetp.pred3,
'(' + predicate + ") " + combiner + " (" + second_pred + ')');
// Set the primary predicate to the result of Predicate OP SecondPredicate
SetPredicate(instr.psetp.pred3,
'(' + predicate + ") " + combiner + " (" + second_pred + ')');
if (instr.psetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
// if enabled
SetPredicate(instr.psetp.pred0,
"!(" + predicate + ") " + combiner + " (" + second_pred + ')');
if (instr.psetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
// Set the secondary predicate to the result of !Predicate OP SecondPredicate,
// if enabled
SetPredicate(instr.psetp.pred0,
"!(" + predicate + ") " + combiner + " (" + second_pred + ')');
}
break;
}
case OpCode::Id::CSETP: {
const std::string pred =
GetPredicateCondition(instr.csetp.pred39, instr.csetp.neg_pred39 != 0);
const std::string combiner = GetPredicateCombiner(instr.csetp.op);
const std::string controlCode = regs.GetControlCode(instr.csetp.cc);
if (instr.csetp.pred3 != static_cast<u64>(Pred::UnusedIndex)) {
SetPredicate(instr.csetp.pred3,
'(' + controlCode + ") " + combiner + " (" + pred + ')');
}
if (instr.csetp.pred0 != static_cast<u64>(Pred::UnusedIndex)) {
SetPredicate(instr.csetp.pred0,
"!(" + controlCode + ") " + combiner + " (" + pred + ')');
}
break;
}
default: {
LOG_CRITICAL(HW_GPU, "Unhandled predicate instruction: {}", opcode->GetName());
UNREACHABLE();
}
}
break;
}