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gl_shader_decompiler: Implement LOP instructions.

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This commit is contained in:
bunnei 2018-06-17 13:26:11 -04:00
parent 5673ce39c7
commit afdd657d30
2 changed files with 42 additions and 6 deletions
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14
src/video_core/engines/shader_bytecode.h
View file

@ -229,6 +229,14 @@ union Instruction {
BitField<42, 1, u64> negate_pred;
} fmnmx;
union {
BitField<39, 1, u64> invert_a;
BitField<40, 1, u64> invert_b;
BitField<41, 2, LogicOperation> operation;
BitField<44, 2, u64> unk44;
BitField<48, 3, Pred> pred48;
} lop;
union {
BitField<53, 2, LogicOperation> operation;
BitField<55, 1, u64> invert_a;
@ -476,6 +484,9 @@ public:
I2I_C,
I2I_R,
I2I_IMM,
LOP_C,
LOP_R,
LOP_IMM,
LOP32I,
MOV_C,
MOV_R,
@ -675,6 +686,9 @@ private:
INST("0100110000000---", Id::BFE_C, Type::Bfe, "BFE_C"),
INST("0101110000000---", Id::BFE_R, Type::Bfe, "BFE_R"),
INST("0011100-00000---", Id::BFE_IMM, Type::Bfe, "BFE_IMM"),
INST("0100110001000---", Id::LOP_C, Type::ArithmeticInteger, "LOP_C"),
INST("0101110001000---", Id::LOP_R, Type::ArithmeticInteger, "LOP_R"),
INST("0011100001000---", Id::LOP_IMM, Type::ArithmeticInteger, "LOP_IMM"),
INST("000001----------", Id::LOP32I, Type::ArithmeticIntegerImmediate, "LOP32I"),
INST("0100110001001---", Id::SHL_C, Type::Shift, "SHL_C"),
INST("0101110001001---", Id::SHL_R, Type::Shift, "SHL_R"),

34
src/video_core/renderer_opengl/gl_shader_decompiler.cpp
View file

@ -1043,12 +1043,7 @@ private:
}
case OpCode::Type::ArithmeticInteger: {
std::string op_a = regs.GetRegisterAsInteger(instr.gpr8);
if (instr.alu_integer.negate_a)
op_a = '-' + op_a;
std::string op_b = instr.alu_integer.negate_b ? "-" : "";
std::string op_b;
if (instr.is_b_imm) {
op_b += '(' + std::to_string(instr.alu.GetSignedImm20_20()) + ')';
} else {
@ -1064,6 +1059,12 @@ private:
case OpCode::Id::IADD_C:
case OpCode::Id::IADD_R:
case OpCode::Id::IADD_IMM: {
if (instr.alu_integer.negate_a)
op_a = "-(" + op_a + ')';
if (instr.alu_integer.negate_b)
op_b = "-(" + op_b + ')';
regs.SetRegisterToInteger(instr.gpr0, true, 0, op_a + " + " + op_b, 1, 1,
instr.alu.saturate_d);
break;
@ -1071,12 +1072,33 @@ private:
case OpCode::Id::ISCADD_C:
case OpCode::Id::ISCADD_R:
case OpCode::Id::ISCADD_IMM: {
if (instr.alu_integer.negate_a)
op_a = "-(" + op_a + ')';
if (instr.alu_integer.negate_b)
op_b = "-(" + op_b + ')';
std::string shift = std::to_string(instr.alu_integer.shift_amount.Value());
regs.SetRegisterToInteger(instr.gpr0, true, 0,
"((" + op_a + " << " + shift + ") + " + op_b + ')', 1, 1);
break;
}
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);
break;
}
default: {
NGLOG_CRITICAL(HW_GPU, "Unhandled ArithmeticInteger instruction: {}",
opcode->GetName());