gl_shader_decompiler: Refactor LOP32I instruction a bit in support of LOP.
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3c43ea5c68
commit
5673ce39c7
2 changed files with 42 additions and 57 deletions
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@ -16,6 +16,7 @@ namespace Decompiler {
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using Tegra::Shader::Attribute;
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using Tegra::Shader::Instruction;
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using Tegra::Shader::LogicOperation;
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using Tegra::Shader::OpCode;
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using Tegra::Shader::Register;
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using Tegra::Shader::Sampler;
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@ -759,6 +760,31 @@ private:
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return (absolute_offset % SchedPeriod) == 0;
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}
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void WriteLogicOperation(Register dest, LogicOperation logic_op, const std::string& op_a,
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const std::string& op_b) {
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switch (logic_op) {
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case LogicOperation::And: {
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regs.SetRegisterToInteger(dest, true, 0, '(' + op_a + " & " + op_b + ')', 1, 1);
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break;
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}
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case LogicOperation::Or: {
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regs.SetRegisterToInteger(dest, true, 0, '(' + op_a + " | " + op_b + ')', 1, 1);
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break;
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}
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case LogicOperation::Xor: {
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regs.SetRegisterToInteger(dest, true, 0, '(' + op_a + " ^ " + op_b + ')', 1, 1);
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break;
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}
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case LogicOperation::PassB: {
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regs.SetRegisterToInteger(dest, true, 0, op_b, 1, 1);
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break;
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}
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default:
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NGLOG_CRITICAL(HW_GPU, "Unimplemented logic operation: {}", static_cast<u32>(logic_op));
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UNREACHABLE();
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}
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}
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/**
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* Compiles a single instruction from Tegra to GLSL.
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* @param offset the offset of the Tegra shader instruction.
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@ -942,55 +968,6 @@ private:
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break;
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}
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case OpCode::Type::Logic: {
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std::string op_a = regs.GetRegisterAsInteger(instr.gpr8, 0, true);
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if (instr.alu.lop.invert_a)
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op_a = "~(" + op_a + ')';
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switch (opcode->GetId()) {
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case OpCode::Id::LOP32I: {
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u32 imm = static_cast<u32>(instr.alu.imm20_32.Value());
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if (instr.alu.lop.invert_b)
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imm = ~imm;
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std::string op_b = std::to_string(imm);
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switch (instr.alu.lop.operation) {
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case Tegra::Shader::LogicOperation::And: {
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regs.SetRegisterToInteger(instr.gpr0, true, 0, '(' + op_a + " & " + op_b + ')',
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1, 1);
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break;
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}
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case Tegra::Shader::LogicOperation::Or: {
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regs.SetRegisterToInteger(instr.gpr0, true, 0, '(' + op_a + " | " + op_b + ')',
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1, 1);
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break;
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}
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case Tegra::Shader::LogicOperation::Xor: {
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regs.SetRegisterToInteger(instr.gpr0, true, 0, '(' + op_a + " ^ " + op_b + ')',
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1, 1);
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break;
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}
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case Tegra::Shader::LogicOperation::PassB: {
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regs.SetRegisterToInteger(instr.gpr0, true, 0, op_b, 1, 1);
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break;
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}
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default:
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NGLOG_CRITICAL(HW_GPU, "Unimplemented lop32i operation: {}",
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static_cast<u32>(instr.alu.lop.operation.Value()));
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UNREACHABLE();
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}
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break;
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}
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default: {
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NGLOG_CRITICAL(HW_GPU, "Unhandled logic instruction: {}", opcode->GetName());
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UNREACHABLE();
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}
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}
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break;
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}
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case OpCode::Type::Shift: {
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std::string op_a = regs.GetRegisterAsInteger(instr.gpr8, 0, true);
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@ -1036,17 +1013,26 @@ private:
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case OpCode::Type::ArithmeticIntegerImmediate: {
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std::string op_a = regs.GetRegisterAsInteger(instr.gpr8);
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if (instr.iadd32i.negate_a)
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op_a = '-' + op_a;
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std::string op_b = '(' + std::to_string(instr.alu.imm20_32.Value()) + ')';
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std::string op_b = std::to_string(instr.alu.imm20_32.Value());
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switch (opcode->GetId()) {
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case OpCode::Id::IADD32I:
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if (instr.iadd32i.negate_a)
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op_a = "-(" + op_a + ')';
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regs.SetRegisterToInteger(instr.gpr0, true, 0, op_a + " + " + op_b, 1, 1,
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instr.iadd32i.saturate != 0);
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break;
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case OpCode::Id::LOP32I: {
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if (instr.alu.lop32i.invert_a)
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op_a = "~(" + op_a + ')';
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if (instr.alu.lop32i.invert_b)
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op_b = "~(" + op_b + ')';
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WriteLogicOperation(instr.gpr0, instr.alu.lop32i.operation, op_a, op_b);
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break;
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}
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default: {
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NGLOG_CRITICAL(HW_GPU, "Unhandled ArithmeticIntegerImmediate instruction: {}",
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opcode->GetName());
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