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shader_decode: Implement LEA

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This commit is contained in:
ReinUsesLisp 2018-12-19 00:43:23 -03:00
parent 4fd06efeb9
commit c9cf899d18
1 changed files with 55 additions and 0 deletions
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55
src/video_core/shader/decode/arithmetic_integer.cpp
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@ -12,6 +12,7 @@ namespace VideoCommon::Shader {
using Tegra::Shader::IAdd3Height;
using Tegra::Shader::Instruction;
using Tegra::Shader::OpCode;
using Tegra::Shader::Pred;
using Tegra::Shader::Register;
u32 ShaderIR::DecodeArithmeticInteger(BasicBlock& bb, u32 pc) {
@ -175,6 +176,60 @@ u32 ShaderIR::DecodeArithmeticInteger(BasicBlock& bb, u32 pc) {
SetRegister(bb, instr.gpr0, value);
break;
}
case OpCode::Id::LEA_R2:
case OpCode::Id::LEA_R1:
case OpCode::Id::LEA_IMM:
case OpCode::Id::LEA_RZ:
case OpCode::Id::LEA_HI: {
const auto [op_a, op_b, op_c] = [&]() -> std::tuple<Node, Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::LEA_R2: {
return {GetRegister(instr.gpr20), GetRegister(instr.gpr39),
Immediate(static_cast<u32>(instr.lea.r2.entry_a))};
}
case OpCode::Id::LEA_R1: {
const bool neg = instr.lea.r1.neg != 0;
return {GetOperandAbsNegInteger(GetRegister(instr.gpr8), false, neg, true),
GetRegister(instr.gpr20),
Immediate(static_cast<u32>(instr.lea.r1.entry_a))};
}
case OpCode::Id::LEA_IMM: {
const bool neg = instr.lea.imm.neg != 0;
return {Immediate(static_cast<u32>(instr.lea.imm.entry_a)),
GetOperandAbsNegInteger(GetRegister(instr.gpr8), false, neg, true),
Immediate(static_cast<u32>(instr.lea.imm.entry_b))};
}
case OpCode::Id::LEA_RZ: {
const bool neg = instr.lea.rz.neg != 0;
return {GetConstBuffer(instr.lea.rz.cb_index, instr.lea.rz.cb_offset),
GetOperandAbsNegInteger(GetRegister(instr.gpr8), false, neg, true),
Immediate(static_cast<u32>(instr.lea.rz.entry_a))};
}
case OpCode::Id::LEA_HI:
default:
UNIMPLEMENTED_MSG("Unhandled LEA subinstruction: {}", opcode->get().GetName());
return {Immediate(static_cast<u32>(instr.lea.imm.entry_a)), GetRegister(instr.gpr8),
Immediate(static_cast<u32>(instr.lea.imm.entry_b))};
}
}();
UNIMPLEMENTED_IF_MSG(instr.lea.pred48 != static_cast<u64>(Pred::UnusedIndex),
"Unhandled LEA Predicate");
const Node shifted_c =
Operation(OperationCode::ILogicalShiftLeft, NO_PRECISE, Immediate(1), op_c);
const Node mul_bc = Operation(OperationCode::IMul, NO_PRECISE, op_b, shifted_c);
const Node value = Operation(OperationCode::IAdd, NO_PRECISE, op_a, mul_bc);
SetRegister(bb, instr.gpr0, value);
break;
}
default:
UNIMPLEMENTED_MSG("Unhandled ArithmeticInteger instruction: {}", opcode->get().GetName());
}