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Merge pull request #1103 from Subv/lop_pred

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Shader: Implemented the predicate and mode arguments of LOP.
This commit is contained in:
bunnei 2018-08-19 13:19:16 -04:00 committed by GitHub
commit d6cb22b0df
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 39 additions and 11 deletions
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7
src/video_core/engines/shader_bytecode.h
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@ -214,6 +214,11 @@ enum class FlowCondition : u64 {
Fcsm_Tr = 0x1C, // TODO(bunnei): What is this used for?
};
enum class PredicateResultMode : u64 {
None = 0x0,
NotZero = 0x3,
};
union Instruction {
Instruction& operator=(const Instruction& instr) {
value = instr.value;
@ -254,7 +259,7 @@ union Instruction {
BitField<39, 1, u64> invert_a;
BitField<40, 1, u64> invert_b;
BitField<41, 2, LogicOperation> operation;
BitField<44, 2, u64> unk44;
BitField<44, 2, PredicateResultMode> pred_result_mode;
BitField<48, 3, Pred> pred48;
} lop;

43
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View File

@ -756,28 +756,51 @@ private:
}
void WriteLogicOperation(Register dest, LogicOperation logic_op, const std::string& op_a,
const std::string& op_b) {
const std::string& op_b,
Tegra::Shader::PredicateResultMode predicate_mode,
Tegra::Shader::Pred predicate) {
std::string result{};
switch (logic_op) {
case LogicOperation::And: {
regs.SetRegisterToInteger(dest, true, 0, '(' + op_a + " & " + op_b + ')', 1, 1);
result = '(' + op_a + " & " + op_b + ')';
break;
}
case LogicOperation::Or: {
regs.SetRegisterToInteger(dest, true, 0, '(' + op_a + " | " + op_b + ')', 1, 1);
result = '(' + op_a + " | " + op_b + ')';
break;
}
case LogicOperation::Xor: {
regs.SetRegisterToInteger(dest, true, 0, '(' + op_a + " ^ " + op_b + ')', 1, 1);
result = '(' + op_a + " ^ " + op_b + ')';
break;
}
case LogicOperation::PassB: {
regs.SetRegisterToInteger(dest, true, 0, op_b, 1, 1);
result = op_b;
break;
}
default:
LOG_CRITICAL(HW_GPU, "Unimplemented logic operation: {}", static_cast<u32>(logic_op));
UNREACHABLE();
}
if (dest != Tegra::Shader::Register::ZeroIndex) {
regs.SetRegisterToInteger(dest, true, 0, result, 1, 1);
}
using Tegra::Shader::PredicateResultMode;
// Write the predicate value depending on the predicate mode.
switch (predicate_mode) {
case PredicateResultMode::None:
// Do nothing.
return;
case PredicateResultMode::NotZero:
// Set the predicate to true if the result is not zero.
SetPredicate(static_cast<u64>(predicate), '(' + result + ") != 0");
break;
default:
LOG_CRITICAL(HW_GPU, "Unimplemented predicate result mode: {}",
static_cast<u32>(predicate_mode));
UNREACHABLE();
}
}
void WriteTexsInstruction(const Instruction& instr, const std::string& coord,
@ -1099,7 +1122,9 @@ private:
if (instr.alu.lop32i.invert_b)
op_b = "~(" + op_b + ')';
WriteLogicOperation(instr.gpr0, instr.alu.lop32i.operation, op_a, op_b);
WriteLogicOperation(instr.gpr0, instr.alu.lop32i.operation, op_a, op_b,
Tegra::Shader::PredicateResultMode::None,
Tegra::Shader::Pred::UnusedIndex);
break;
}
default: {
@ -1165,16 +1190,14 @@ private:
case OpCode::Id::LOP_C:
case OpCode::Id::LOP_R:
case OpCode::Id::LOP_IMM: {
ASSERT_MSG(!instr.alu.lop.unk44, "Unimplemented");
ASSERT_MSG(instr.alu.lop.pred48 == Pred::UnusedIndex, "Unimplemented");
if (instr.alu.lop.invert_a)
op_a = "~(" + op_a + ')';
if (instr.alu.lop.invert_b)
op_b = "~(" + op_b + ')';
WriteLogicOperation(instr.gpr0, instr.alu.lop.operation, op_a, op_b);
WriteLogicOperation(instr.gpr0, instr.alu.lop.operation, op_a, op_b,
instr.alu.lop.pred_result_mode, instr.alu.lop.pred48);
break;
}
case OpCode::Id::IMNMX_C: