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shader_decode: Implement BFI

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This commit is contained in:
ReinUsesLisp 2018-12-17 17:09:23 -03:00
parent 078ba28e13
commit 80183de884
1 changed files with 22 additions and 1 deletions
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23
src/video_core/shader/decode/bfi.cpp
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@ -16,7 +16,28 @@ u32 ShaderIR::DecodeBfi(BasicBlock& bb, u32 pc) {
const Instruction instr = {program_code[pc]};
const auto opcode = OpCode::Decode(instr);
UNIMPLEMENTED();
UNIMPLEMENTED_IF(instr.generates_cc);
const auto [base, packed_shift] = [&]() -> std::tuple<Node, Node> {
switch (opcode->get().GetId()) {
case OpCode::Id::BFI_IMM_R:
return {GetRegister(instr.gpr39), Immediate(instr.alu.GetSignedImm20_20())};
default:
UNREACHABLE();
}
}();
const Node insert = GetRegister(instr.gpr8);
const Node offset =
Operation(OperationCode::UBitwiseAnd, NO_PRECISE, packed_shift, Immediate(0xff));
Node bits =
Operation(OperationCode::ULogicalShiftRight, NO_PRECISE, packed_shift, Immediate(8));
bits = Operation(OperationCode::UBitwiseAnd, NO_PRECISE, bits, Immediate(0xff));
const Node value =
Operation(OperationCode::UBitfieldInsert, PRECISE, base, insert, offset, bits);
SetRegister(bb, instr.gpr0, value);
return pc;
}