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emit_arm64_data_processing: Implement RotateRightExtended

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Merry 2022-07-30 19:11:18 +01:00 committed by merry
parent 22d87bcbe5
commit f642f49b93
1 changed files with 26 additions and 4 deletions
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30
src/dynarmic/backend/arm64/emit_arm64_data_processing.cpp
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@ -645,10 +645,32 @@ void EmitIR<IR::Opcode::RotateRight64>(oaknut::CodeGenerator& code, EmitContext&
template<> template<>
void EmitIR<IR::Opcode::RotateRightExtended>(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst) { void EmitIR<IR::Opcode::RotateRightExtended>(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst) {
(void)code; const auto carry_inst = inst->GetAssociatedPseudoOperation(IR::Opcode::GetCarryFromOp);
(void)ctx;
(void)inst; auto args = ctx.reg_alloc.GetArgumentInfo(inst);
ASSERT_FALSE("Unimplemented"); auto Wresult = ctx.reg_alloc.WriteW(inst);
auto Woperand = ctx.reg_alloc.ReadW(args[0]);
if (args[1].IsImmediate()) {
RegAlloc::Realize(Wresult, Woperand);
code.LSR(Wresult, Woperand, 1);
if (args[1].GetImmediateU1()) {
code.ORR(Wresult, Wresult, 0x8000'0000);
}
} else {
auto Wcarry_in = ctx.reg_alloc.ReadW(args[1]);
RegAlloc::Realize(Wresult, Woperand, Wcarry_in);
code.LSR(Wscratch0, Wcarry_in, 29);
code.EXTR(Wresult, Wscratch0, Woperand, 1);
}
if (carry_inst) {
auto Wcarry_out = ctx.reg_alloc.WriteW(carry_inst);
RegAlloc::Realize(Wcarry_out);
code.UBFIZ(Wcarry_out, Woperand, 29, 1);
}
} }
template<> template<>