diff --git a/src/dynarmic/backend/arm64/emit_arm64_saturation.cpp b/src/dynarmic/backend/arm64/emit_arm64_saturation.cpp index b55660b0..84b85e5c 100644 --- a/src/dynarmic/backend/arm64/emit_arm64_saturation.cpp +++ b/src/dynarmic/backend/arm64/emit_arm64_saturation.cpp @@ -20,10 +20,22 @@ using namespace oaknut::util; template<> void EmitIR(oaknut::CodeGenerator& code, EmitContext& ctx, IR::Inst* inst) { - (void)code; - (void)ctx; - (void)inst; - ASSERT_FALSE("Unimplemented"); + const auto overflow_inst = inst->GetAssociatedPseudoOperation(IR::Opcode::GetOverflowFromOp); + ASSERT(overflow_inst); + + auto args = ctx.reg_alloc.GetArgumentInfo(inst); + auto Wresult = ctx.reg_alloc.WriteW(inst); + auto Wa = ctx.reg_alloc.ReadW(args[0]); + auto Wb = ctx.reg_alloc.ReadW(args[1]); + auto Woverflow = ctx.reg_alloc.WriteW(overflow_inst); + RegAlloc::Realize(Wresult, Wa, Wb, Woverflow); + ctx.reg_alloc.SpillFlags(); + + code.ADDS(Wresult, *Wa, Wb); + code.ASR(Wscratch0, Wresult, 31); + code.EOR(Wscratch0, Wscratch0, 0x8000'0000); + code.CSEL(Wresult, Wresult, Wscratch0, VC); + code.CSET(Woverflow, VS); } template<>