Merge pull request #1763 from ReinUsesLisp/bfi
gl_shader_decompiler: Implement BFI_IMM_R
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commit
f9a211220c
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@ -1269,6 +1269,7 @@ public:
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BFE_C,
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BFE_R,
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BFE_IMM,
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BFI_IMM_R,
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BRA,
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PBK,
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LD_A,
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@ -1410,6 +1411,7 @@ public:
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ArithmeticHalf,
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ArithmeticHalfImmediate,
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Bfe,
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Bfi,
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Shift,
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Ffma,
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Hfma2,
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@ -1628,6 +1630,7 @@ private:
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INST("0100110000000---", Id::BFE_C, Type::Bfe, "BFE_C"),
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INST("0101110000000---", Id::BFE_R, Type::Bfe, "BFE_R"),
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INST("0011100-00000---", Id::BFE_IMM, Type::Bfe, "BFE_IMM"),
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INST("0011011-11110---", Id::BFI_IMM_R, Type::Bfi, "BFI_IMM_R"),
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INST("0100110001000---", Id::LOP_C, Type::ArithmeticInteger, "LOP_C"),
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INST("0101110001000---", Id::LOP_R, Type::ArithmeticInteger, "LOP_R"),
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INST("0011100001000---", Id::LOP_IMM, Type::ArithmeticInteger, "LOP_IMM"),
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@ -1721,6 +1721,26 @@ private:
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break;
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}
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case OpCode::Type::Bfi: {
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UNIMPLEMENTED_IF(instr.generates_cc);
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const auto [base, packed_shift] = [&]() -> std::tuple<std::string, std::string> {
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switch (opcode->get().GetId()) {
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case OpCode::Id::BFI_IMM_R:
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return {regs.GetRegisterAsInteger(instr.gpr39, 0, false),
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std::to_string(instr.alu.GetSignedImm20_20())};
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default:
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UNREACHABLE();
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}
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}();
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const std::string offset = '(' + packed_shift + " & 0xff)";
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const std::string bits = "((" + packed_shift + " >> 8) & 0xff)";
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const std::string insert = regs.GetRegisterAsInteger(instr.gpr8, 0, false);
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regs.SetRegisterToInteger(
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instr.gpr0, false, 0,
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"bitfieldInsert(" + base + ", " + insert + ", " + offset + ", " + bits + ')', 1, 1);
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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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std::string op_b;
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